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Overview
Comment:Update the SQLite build to version 3.6.14.
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1:e6cd5e74a29681f883e68269b59f6193dd65646d
User & Date: drh 2009-05-06 16:58:58
Context
2009-06-23
14:56
Update to the latest version of SQLite. check-in: 62082e8586 user: drh tags: trunk
2009-05-06
16:58
Update the SQLite build to version 3.6.14. check-in: e6cd5e74a2 user: drh tags: trunk
2009-03-31
13:02
Update the SQLite core to version 3.6.12. check-in: c3a3dfe2cb user: drh tags: trunk
Changes
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17689

17690
17691
17692
17693
17694
17695
17696
.....
17717
17718
17719
17720
17721
17722
17723



17724
17725








17726
17727
17728
17729
17730
17731
17732
17733
.....
17741
17742
17743
17744
17745
17746
17747





17748
17749
17750
17751
17752
17753




17754
17755
17756
17757
17758
17759
17760
17761
17762
17763
17764
17765
17766
17767
17768
17769
17770
17771
17772
17773
17774
17775
17776
17777
17778
17779
17780
17781
17782
17783
17784
17785
.....
17830
17831
17832
17833
17834
17835
17836

17837
17838
17839
17840
17841
17842
17843
.....
17853
17854
17855
17856
17857
17858
17859







17860
17861
17862
17863
17864
17865
17866
17867
17868
17869
17870
17871
17872
17873
17874
17875
17876
17877
17878
17879
17880
17881
17882
17883
17884
17885
17886
17887
17888
17889


17890
17891
17892
17893
17894
17895
17896
.....
17908
17909
17910
17911
17912
17913
17914
17915
17916



17917
17918



17919
17920
17921
17922
17923
17924
17925
17926
17927
17928
17929
17930
17931
17932
17933
17934
17935
17936
17937
17938
17939
17940
17941
17942
17943
17944
17945
17946
17947
17948
17949
17950
.....
18095
18096
18097
18098
18099
18100
18101
18102
18103
18104
18105
18106
18107
18108
18109


18110

18111
18112
18113
18114
18115

18116
18117
18118
18119
18120
18121
18122
18123
18124
18125
18126
18127
.....
18418
18419
18420
18421
18422
18423
18424


18425
18426
18427
18428
18429

18430
18431
18432
18433
18434

18435
18436
18437
18438
18439

18440
18441
18442
18443
18444
18445

18446
18447
18448
18449
18450
18451

18452
18453
18454
18455
18456
18457
18458


























18459
18460
18461
18462
18463
18464

18465
18466
18467
18468
18469
18470
18471
18472
18473
18474
18475
18476
18477

18478
18479
18480
18481
18482
18483
18484
.....
18492
18493
18494
18495
18496
18497
18498

18499
18500
18501
18502
18503
18504
18505
18506
18507
18508
18509
18510
18511
18512
18513
18514
18515
18516
18517
.....
18641
18642
18643
18644
18645
18646
18647
18648

18649




18650

18651
18652
18653
18654
18655
18656
18657
18658
18659
18660
18661
.....
18671
18672
18673
18674
18675
18676
18677
18678
18679
18680
18681
18682
18683
18684
18685
18686
18687
18688
18689
18690
18691
18692
18693
18694
18695
18696
18697
.....
18705
18706
18707
18708
18709
18710
18711
18712
18713
18714
18715
18716
18717
18718
18719
18720
18721
18722
18723
18724
18725
18726
18727

18728
18729
18730
18731
18732
18733
18734
18735
18736
18737
18738
18739
18740

18741
18742
18743
18744
18745
18746
18747



18748



18749
18750
18751
18752
18753
18754
18755
18756
18757
18758
18759
18760
18761
18762
18763
18764
18765
18766
18767
18768


18769
18770
18771
18772
18773
18774
18775
18776
18777
18778
18779
18780
18781
18782
18783
18784
18785
18786
18787
18788
18789
18790
18791
18792
18793

18794
18795
18796
18797
18798

18799
18800
18801
18802
18803
18804
18805
18806
18807
18808
18809
18810
18811
18812
18813
18814
18815
18816
18817




18818
18819

18820
18821
18822
18823
18824
18825
18826
18827
18828
18829
18830
18831
18832
18833
18834
18835
18836
18837
18838
18839
18840
18841
18842
18843
18844

18845
18846
18847
18848
18849
18850
18851
18852
18853
18854
18855
18856
18857
18858
18859
18860
18861
18862
18863
18864
18865
18866
18867
18868
18869
18870
18871
18872
18873
18874
18875
18876
18877
18878
18879
18880
18881
18882
18883
18884
18885
18886










18887
18888
18889
18890
18891
18892
18893
18894
18895
18896
18897
18898
18899
18900
18901
18902
18903
18904
18905
18906
18907
18908
18909
18910
18911
18912

18913
18914



18915
18916
18917
18918
18919
18920
18921
18922
18923
18924
18925
18926
18927
18928
18929
18930
18931
18932
18933
18934
18935
18936
18937
18938
18939
18940
18941
18942
18943

18944


18945
18946
18947
18948
18949
18950
18951
18952
18953
18954
18955
18956
18957
18958
18959
18960
18961
18962



18963
18964
18965
18966
18967
18968
18969
.....
18977
18978
18979
18980
18981
18982
18983
18984
18985
18986
18987
18988
18989
18990
18991
18992
18993
18994
18995
18996
18997
18998
18999
19000
19001
19002
19003
19004
19005
19006
19007
19008
19009
19010
19011
19012
19013
19014
19015
19016
19017
19018
19019
19020
19021
19022
19023
19024
19025
19026
19027
19028
19029
19030
19031
19032
19033
19034
19035
19036
19037
19038
19039
19040
19041
19042
19043
19044
19045
19046
19047
19048
19049
19050
19051
19052
19053
19054
19055
19056
19057
19058
19059
19060
19061
19062
19063
19064
19065
19066
19067
19068
19069
19070
19071
19072
19073
19074
19075
19076
19077
19078
19079
19080
19081
19082
19083
19084
19085
19086
19087
19088
19089
19090
19091
19092
.....
20513
20514
20515
20516
20517
20518
20519
20520
20521
20522
20523
20524
20525
20526
20527
.....
22903
22904
22905
22906
22907
22908
22909
22910
22911

22912
22913
22914
22915
22916
22917
22918
.....
23897
23898
23899
23900
23901
23902
23903
23904
23905
23906
23907
23908
23909
23910
23911
.....
24021
24022
24023
24024
24025
24026
24027






































24028
24029
24030
24031
24032
24033
24034
.....
24303
24304
24305
24306
24307
24308
24309
24310
24311
24312
24313
24314
24315
24316
24317
.....
24406
24407
24408
24409
24410
24411
24412
24413
24414
24415
24416
24417
24418
24419
24420
.....
25751
25752
25753
25754
25755
25756
25757
25758
25759
25760
25761
25762
25763
25764
25765
25766
25767
25768
25769

25770

25771
25772
25773
25774
25775
25776
25777
.....
25808
25809
25810
25811
25812
25813
25814
25815
25816
25817
25818
25819
25820
25821
25822
.....
27329
27330
27331
27332
27333
27334
27335









27336

27337
27338

27339
27340
27341
27342
27343
27344
27345
27346
27347
27348
27349
27350
27351
27352
.....
27604
27605
27606
27607
27608
27609
27610
27611
27612
27613
27614
27615
27616
27617
27618
27619
27620
27621
27622
27623
27624
27625
27626
27627

27628
27629
27630
27631
27632
27633
27634
27635

27636
27637

27638
27639
27640
27641
27642
27643
27644

27645
27646
27647
27648
27649
27650
27651
27652

27653
27654

27655
27656
27657
27658
27659
27660
27661
27662
.....
27930
27931
27932
27933
27934
27935
27936
27937
27938
27939
27940
27941
27942
27943
27944
.....
27989
27990
27991
27992
27993
27994
27995
27996
27997

27998
27999
28000
28001
28002
28003
28004
.....
28272
28273
28274
28275
28276
28277
28278
28279

28280
28281
28282
28283
28284
28285
28286
.....
28892
28893
28894
28895
28896
28897
28898
28899
28900
28901
28902
28903
28904
28905
28906
.....
29402
29403
29404
29405
29406
29407
29408
29409
29410
29411
29412
29413
29414
29415
29416
.....
29640
29641
29642
29643
29644
29645
29646
29647
29648
29649
29650
29651
29652
29653
29654

29655
29656
29657
29658

29659
29660




29661































29662
29663
29664

29665





29666
29667
29668

29669
29670
29671
29672
29673
29674
29675
29676

29677
29678
29679
29680
29681
29682
29683
29684
29685
29686
29687
29688
29689
29690
29691
29692
29693
29694
29695
29696
29697
29698
29699
29700

29701
29702

29703
29704
29705
29706
29707
29708
29709
.....
29718
29719
29720
29721
29722
29723
29724

29725
29726
29727

29728
29729
29730
29731
29732


29733
29734
29735
29736
29737
29738
29739
29740
29741
29742
29743

29744
29745
29746
29747
29748
29749
29750
29751
29752
29753
29754
29755
29756
29757
29758
29759
29760
29761
29762
29763
29764
29765
29766
29767
29768
29769
29770
29771
29772
29773
29774
29775
29776
29777
29778
29779
29780
29781
29782
29783
29784
29785
29786
29787
29788

29789
29790
29791
29792
29793
29794
29795
29796
29797
29798
29799
29800
29801
29802
29803
29804
29805
29806
29807
29808
29809
29810
29811
29812
29813
29814
29815
29816
29817
29818
29819
29820
29821
29822
29823
29824
29825
29826
29827
29828
29829
29830
29831
29832
29833
29834
29835
29836
29837
29838
29839
29840
29841
29842
29843
29844
29845
29846
29847
29848
29849
29850
29851

29852










































































































29853
29854
29855



29856
29857
29858
29859
29860

29861
29862
29863
29864
29865
29866
29867
29868
29869
29870
29871




























29872
29873
29874
29875
29876
29877
29878
.....
29888
29889
29890
29891
29892
29893
29894
29895
29896
29897
29898
29899
29900
29901
29902
.....
30098
30099
30100
30101
30102
30103
30104






30105
30106
30107
30108
30109
30110
30111
.....
30131
30132
30133
30134
30135
30136
30137

30138
30139
30140
30141
30142
30143
30144
.....
30910
30911
30912
30913
30914
30915
30916

30917
30918
30919
30920
30921
30922
30923
30924
30925
30926
30927
30928
30929
30930
30931
30932
30933
30934
30935
30936
30937
.....
31159
31160
31161
31162
31163
31164
31165



31166

31167
31168
31169
31170
31171
31172
31173
.....
31893
31894
31895
31896
31897
31898
31899
31900
31901

31902
31903
31904
31905
31906
31907
31908
31909
31910
31911
.....
32983
32984
32985
32986
32987
32988
32989
32990
32991
32992
32993
32994
32995
32996
32997
32998
32999
.....
33041
33042
33043
33044
33045
33046
33047
33048
33049
33050
33051
33052
33053
33054

33055
33056
33057
33058
33059
33060
33061
33062
33063
33064

33065
33066
33067
33068
33069
33070
33071
.....
33531
33532
33533
33534
33535
33536
33537




33538
33539
33540


33541
33542
33543
33544
33545
33546
33547
.....
33761
33762
33763
33764
33765
33766
33767
33768
33769
33770
33771
33772
33773
33774
33775
.....
33880
33881
33882
33883
33884
33885
33886








33887
33888
33889
33890

33891
33892
33893
33894
33895
33896
33897
.....
33968
33969
33970
33971
33972
33973
33974
33975
33976
33977
33978
33979
33980
33981
33982
.....
34943
34944
34945
34946
34947
34948
34949

34950
34951
34952
34953
34954
34955
34956
34957
34958
34959
34960
34961
34962
34963
34964
.....
35054
35055
35056
35057
35058
35059
35060
35061
35062

35063





35064
35065
35066
35067
35068
35069
35070
35071
35072
35073
35074
35075
35076
35077

35078





35079

35080
35081
35082
35083
35084
35085



35086
35087
35088
35089
35090
35091
35092
.....
35113
35114
35115
35116
35117
35118
35119
35120
35121
35122
35123
35124
35125
35126
35127
.....
35765
35766
35767
35768
35769
35770
35771
35772

35773




























35774
35775
35776
35777
35778
35779
35780
.....
35804
35805
35806
35807
35808
35809
35810




35811
35812
35813
35814
35815
35816
35817
35818
35819

35820
35821
35822
35823
35824
35825
35826
.....
35827
35828
35829
35830
35831
35832
35833
35834
35835
35836
35837
35838
35839

35840
35841
35842
35843

35844
35845
35846
35847
35848
35849
35850
35851
35852
35853
35854
35855
35856
35857
35858
35859
35860
35861
35862
35863
35864
35865
35866
35867
35868
35869
35870
35871
35872
35873

35874



35875
35876
35877
35878
35879
35880
35881
.....
35907
35908
35909
35910
35911
35912
35913

35914
35915
35916
35917
35918
35919
35920
35921
35922
35923
35924
35925
35926
35927
35928
35929
35930
35931
35932
35933
35934
35935
.....
35938
35939
35940
35941
35942
35943
35944
35945
35946
35947
35948
35949
35950
35951
35952
35953
35954
.....
36029
36030
36031
36032
36033
36034
36035
36036
36037
36038
36039
36040
36041
36042
36043
36044
.....
36052
36053
36054
36055
36056
36057
36058
36059
36060
36061
36062
36063
36064



36065










36066
36067
36068
36069
36070
36071
36072
36073
.....
36074
36075
36076
36077
36078
36079
36080
36081
36082
36083
36084
36085
36086
36087
36088
.....
36167
36168
36169
36170
36171
36172
36173







36174
36175
36176
36177
36178
36179
36180
.....
36202
36203
36204
36205
36206
36207
36208











36209
36210
36211
36212
36213
36214
36215
36216
36217
.....
36295
36296
36297
36298
36299
36300
36301




36302
36303
36304
36305
36306
36307
36308

36309
36310
36311
36312

36313
36314
36315
36316
36317
36318
36319
.....
36803
36804
36805
36806
36807
36808
36809
36810
36811
36812
36813

36814
36815


36816
36817

36818
36819



































36820
36821





36822
36823
36824
36825
36826
36827
36828
.....
36912
36913
36914
36915
36916
36917
36918
36919


36920
36921
36922
36923


36924
36925
36926
36927
36928



36929
36930
36931
36932
36933



36934
36935
36936
36937
36938
36939
36940
36941
36942
36943
36944
36945
36946

36947





36948

36949
36950


36951
36952
36953




36954
36955
36956
36957
36958



36959
36960
36961
36962


36963

36964
36965
36966
36967
36968
36969
36970
36971
36972
36973
36974
36975
36976
36977
36978
36979
36980
36981
36982
36983
36984
36985
36986
36987
36988
36989
36990
36991
.....
37365
37366
37367
37368
37369
37370
37371

37372
37373
37374
37375
37376
37377
37378
37379
37380
37381
37382
.....
37398
37399
37400
37401
37402
37403
37404






37405
37406
37407
37408
37409
37410
37411
.....
37443
37444
37445
37446
37447
37448
37449
37450
37451
37452
37453
37454
37455
37456
37457
37458
37459
37460
.....
37466
37467
37468
37469
37470
37471
37472











37473
37474
37475
37476
37477
37478
37479
.....
37511
37512
37513
37514
37515
37516
37517

37518
37519
37520
37521
37522
37523
37524
37525
37526
37527
37528
37529
37530
37531
37532
37533
37534
37535
37536
.....
37544
37545
37546
37547
37548
37549
37550


37551
37552
37553
37554
37555
37556
37557
37558
37559
37560
.....
37688
37689
37690
37691
37692
37693
37694
37695
37696
37697
37698
37699
37700
37701
37702
.....
37798
37799
37800
37801
37802
37803
37804


37805
37806
37807
37808
37809
37810
37811
37812
37813
37814
37815
37816



37817
37818
37819
37820
37821
37822
37823
37824
37825
.....
37833
37834
37835
37836
37837
37838
37839

37840
37841
37842
37843
37844
37845
37846
.....
37933
37934
37935
37936
37937
37938
37939
37940
37941
37942
37943
37944
37945
37946
37947
.....
37985
37986
37987
37988
37989
37990
37991
37992

37993
37994
37995
37996
37997
37998
37999
.....
38064
38065
38066
38067
38068
38069
38070
38071
38072
38073
38074
38075
38076
38077
38078
38079
38080
38081
38082
38083
38084
38085
.....
38161
38162
38163
38164
38165
38166
38167
38168
38169
38170
38171
38172
38173
38174
38175
.....
38202
38203
38204
38205
38206
38207
38208
38209
38210
38211




38212
38213
38214
38215
38216
38217
38218
38219
38220
38221
38222
38223
38224
38225
38226
.....
38305
38306
38307
38308
38309
38310
38311
38312
38313
38314
38315
38316
38317
38318
38319
.....
38468
38469
38470
38471
38472
38473
38474

38475
38476
38477
38478
38479
38480
38481
38482
38483
38484
38485
38486
38487
38488
38489
.....
38576
38577
38578
38579
38580
38581
38582
38583
38584
38585
38586
38587
38588
38589
38590
.....
38613
38614
38615
38616
38617
38618
38619
38620




38621
38622
38623
38624
38625
38626
38627
38628
38629
38630
38631
38632
38633
38634
38635
38636
.....
38660
38661
38662
38663
38664
38665
38666
38667
38668
38669
38670
38671
38672
38673
38674
.....
38681
38682
38683
38684
38685
38686
38687
38688
38689
38690
38691
38692
38693
38694
38695
.....
38701
38702
38703
38704
38705
38706
38707
38708
38709
38710
38711
38712
38713

38714
38715
38716
38717
38718
38719
38720
38721
38722
38723
38724
38725
38726
38727
38728
38729
.....
38732
38733
38734
38735
38736
38737
38738
38739
38740
38741
38742
38743
38744
38745
38746

38747
38748
38749
38750
38751
38752
38753
38754
38755
38756
38757
38758
38759
38760
.....
38841
38842
38843
38844
38845
38846
38847
38848
38849
38850
38851
38852
38853
38854
38855
.....
38856
38857
38858
38859
38860
38861
38862
38863
38864
38865
38866
38867
38868
38869
38870
.....
38878
38879
38880
38881
38882
38883
38884

38885
38886
38887
38888
38889
38890
38891
.....
38916
38917
38918
38919
38920
38921
38922
38923
38924
38925
38926
38927
38928
38929
38930
.....
38955
38956
38957
38958
38959
38960
38961
38962
38963
38964
38965
38966
38967
38968
38969
.....
39072
39073
39074
39075
39076
39077
39078
39079
39080
39081
39082
39083
39084
39085
39086
.....
39130
39131
39132
39133
39134
39135
39136
39137
39138
39139
39140
39141
39142
39143
39144
.....
39907
39908
39909
39910
39911
39912
39913
















39914
39915
39916
39917
39918
39919
39920
39921
39922
39923
39924
39925
39926
39927
39928
39929
39930
.....
40007
40008
40009
40010
40011
40012
40013
40014
40015
40016


40017
40018
40019
40020
40021
40022
40023
40024
40025
40026
40027
40028
40029
40030
40031
40032
40033
40034


40035
40036
40037
40038
40039











40040






40041








40042
40043
40044
40045
40046
40047
40048
40049
40050
40051
40052
40053
40054
40055
40056
40057
40058
40059
40060
40061
.....
40064
40065
40066
40067
40068
40069
40070
40071
40072
40073
40074
40075
40076
40077
40078
.....
40108
40109
40110
40111
40112
40113
40114
40115

40116
40117
40118
40119
40120
40121
40122
.....
40709
40710
40711
40712
40713
40714
40715
40716



40717
40718
40719
40720
40721
40722
40723
.....
41021
41022
41023
41024
41025
41026
41027
41028
41029
41030
41031
41032
41033
41034
41035
.....
41044
41045
41046
41047
41048
41049
41050
41051
41052
41053
41054
41055
41056
41057
41058
41059
41060
41061
41062
41063
41064
41065
41066
41067
41068
41069
41070
41071
41072
41073
41074
41075
41076
41077
41078
41079
41080
41081
41082
41083
41084
41085
41086
41087
41088
41089
41090
.....
41388
41389
41390
41391
41392
41393
41394
41395
41396
41397
41398
41399
41400
41401
41402
41403
41404
41405
41406
41407
41408
.....
42108
42109
42110
42111
42112
42113
42114











42115
42116
42117
42118
42119
42120
42121

42122
42123
42124
42125
42126
42127
42128
42129
42130
42131
.....
42140
42141
42142
42143
42144
42145
42146
42147
42148










42149
42150
42151
42152
42153
42154
42155
42156
42157
42158
42159
.....
42191
42192
42193
42194
42195
42196
42197























42198


42199


42200
42201

42202
42203
42204
42205
42206
42207
42208
42209
42210
42211
42212
42213
42214
42215
.....
42380
42381
42382
42383
42384
42385
42386
42387
42388
42389
42390
42391
42392
42393
42394
42395
.....
42545
42546
42547
42548
42549
42550
42551
42552
42553
42554
42555
42556
42557
42558
42559
.....
42617
42618
42619
42620
42621
42622
42623
42624
42625
42626
42627
42628
42629
42630
42631
.....
42759
42760
42761
42762
42763
42764
42765
42766
42767
42768
42769
42770
42771
42772
42773
.....
42783
42784
42785
42786
42787
42788
42789
42790
42791
42792
42793
42794
42795
42796
42797
.....
42832
42833
42834
42835
42836
42837
42838
42839





42840

42841
42842
42843
42844
42845
42846
42847
.....
42848
42849
42850
42851
42852
42853
42854
42855
42856
42857
42858
42859
42860
42861
42862
.....
43032
43033
43034
43035
43036
43037
43038
43039
43040
43041
43042
43043
43044
43045
43046
.....
43159
43160
43161
43162
43163
43164
43165
43166
43167
43168
43169
43170
43171
43172
43173
.....
43322
43323
43324
43325
43326
43327
43328
43329
43330
43331
43332
43333
43334
43335
43336
.....
44232
44233
44234
44235
44236
44237
44238
44239
44240
44241
44242
44243
44244
44245
44246
.....
44424
44425
44426
44427
44428
44429
44430

44431
44432
44433
44434
44435
44436
44437
.....
44484
44485
44486
44487
44488
44489
44490

44491
44492
44493
44494
44495
44496
44497
44498
44499
44500

44501
44502
44503
44504
44505
44506
44507
.....
44560
44561
44562
44563
44564
44565
44566

44567
44568
44569
44570
44571
44572
44573
.....
44588
44589
44590
44591
44592
44593
44594

44595
44596
44597
44598
44599
44600
44601
.....
44618
44619
44620
44621
44622
44623
44624

44625
44626
44627
44628
44629
44630
44631
44632
44633
44634
44635
44636
44637


44638
44639
44640
44641
44642
44643
44644
44645
44646
44647
44648


44649
44650
44651
44652
44653
44654
44655
.....
45182
45183
45184
45185
45186
45187
45188
45189
45190
45191
45192
45193
45194



45195
45196
45197
45198
45199
45200
45201
.....
45279
45280
45281
45282
45283
45284
45285
45286
45287
45288
45289
45290
45291
45292
45293
.....
45993
45994
45995
45996
45997
45998
45999
46000
46001
46002
46003
46004
46005
46006
46007
46008
46009
.....
46286
46287
46288
46289
46290
46291
46292

46293
46294
46295
46296
46297
46298
46299
.....
46359
46360
46361
46362
46363
46364
46365



46366
46367
46368
46369
46370
46371
46372
.....
46869
46870
46871
46872
46873
46874
46875



























46876
46877
46878
46879
46880
46881
46882
.....
46918
46919
46920
46921
46922
46923
46924
46925
46926
46927
46928
46929
46930
46931
46932
.....
47172
47173
47174
47175
47176
47177
47178
47179
47180
47181
47182
47183
47184
47185
47186
.....
47234
47235
47236
47237
47238
47239
47240
47241
47242
47243
47244
47245
47246
47247
47248
47249
.....
47579
47580
47581
47582
47583
47584
47585
47586
47587
47588
47589
47590

47591
47592
47593
47594
47595

47596
47597








47598
47599
47600
47601
47602
47603
47604
47605
47606
47607
47608
47609

47610
47611
47612
47613
47614
47615
47616
.....
47717
47718
47719
47720
47721
47722
47723












47724
47725
47726
47727
47728
47729
47730
.....
47918
47919
47920
47921
47922
47923
47924
47925
47926
47927
47928
47929
47930
47931
47932
.....
48303
48304
48305
48306
48307
48308
48309




48310
48311
48312
48313
48314
48315
48316
.....
48346
48347
48348
48349
48350
48351
48352
48353
48354
48355
48356
48357
48358
48359
48360
.....
48462
48463
48464
48465
48466
48467
48468
48469
48470
48471
48472
48473
48474
48475
48476
.....
48521
48522
48523
48524
48525
48526
48527
48528
48529
48530
48531
48532
48533
48534
48535
.....
48667
48668
48669
48670
48671
48672
48673
48674
48675
48676
48677
48678
48679
48680
48681
.....
48807
48808
48809
48810
48811
48812
48813

48814
48815
48816
48817
48818
48819
48820

48821
48822
48823
48824
48825
48826
48827
48828
48829
48830
48831
48832
48833
48834
48835
48836
48837
48838
.....
49056
49057
49058
49059
49060
49061
49062
49063
49064
49065
49066





49067
49068




49069
49070

49071






49072



49073
49074
49075
49076
49077
49078
49079
.....
49095
49096
49097
49098
49099
49100
49101
49102
49103
49104
49105






49106
49107
49108
49109
49110
49111
49112
49113
49114
49115
49116
49117
49118
49119
49120
.....
49151
49152
49153
49154
49155
49156
49157
49158
49159
49160
49161
49162
49163
49164
49165
49166
49167
49168
49169
49170
49171
49172

49173
49174
49175
49176
49177
49178
49179
49180
49181
49182
49183
49184
49185








49186
49187





49188
49189
49190
49191
49192
49193
49194
.....
49270
49271
49272
49273
49274
49275
49276
49277
49278
49279
49280
49281
49282
49283
49284
.....
49653
49654
49655
49656
49657
49658
49659


49660
49661
49662
49663
49664
49665
49666
.....
49878
49879
49880
49881
49882
49883
49884
49885


49886
49887
49888
49889
49890
49891
49892
49893
49894
49895
49896
.....
51681
51682
51683
51684
51685
51686
51687

51688



51689
51690
51691
51692
51693
51694
51695
.....
51772
51773
51774
51775
51776
51777
51778
51779
51780
51781
51782
51783
51784
51785
51786
.....
52646
52647
52648
52649
52650
52651
52652
52653
52654
52655
52656
52657
52658
52659
52660
52661
52662
52663
52664
52665
52666
52667





52668
52669
52670
52671
52672
52673
52674
52675
52676
52677
52678
52679
52680
52681
52682
52683
52684
52685
52686
52687
52688
52689
52690
52691
52692
52693
52694
52695
52696
52697
52698
52699
52700
52701
52702
52703
52704
52705
52706


52707

52708
52709
52710
52711
52712

52713
52714
52715
52716




52717
52718

52719
52720
52721
52722
52723
52724
52725
52726
52727

52728



52729
52730
52731
52732
52733
52734
52735
52736
52737





52738
52739









52740
52741


52742
52743
52744
52745
52746
52747
52748
52749
52750
52751
52752
52753
52754
52755
52756
.....
52773
52774
52775
52776
52777
52778
52779
52780
52781
52782
52783
52784

52785
52786
52787
52788

52789
52790
52791
52792
52793
52794
52795

52796
52797
52798
52799
52800
52801
52802
.....
53031
53032
53033
53034
53035
53036
53037

53038
53039
53040
53041
53042
53043
53044
53045
53046

53047
53048
53049
53050
53051
53052
53053
.....
53203
53204
53205
53206
53207
53208
53209




53210
53211
53212
53213
53214
53215
53216
53217
53218






















53219
53220
53221
53222
53223
53224
53225
53226
53227
53228
53229
53230
53231

53232
53233
53234
53235
53236
53237
53238
.....
53388
53389
53390
53391
53392
53393
53394
53395
53396
53397
53398
53399
53400
53401
53402
.....
53413
53414
53415
53416
53417
53418
53419
53420


53421
53422
53423
53424
53425
53426
53427
.....
53464
53465
53466
53467
53468
53469
53470

53471
53472
53473
53474
53475
53476

53477
53478
53479
53480
53481
53482
53483
.....
53909
53910
53911
53912
53913
53914
53915




















































53916
53917
53918
53919
53920
53921
53922
.....
54340
54341
54342
54343
54344
54345
54346
54347
54348
54349
54350
54351
54352
54353
54354
54355
54356
54357
54358
54359
54360
54361
54362
54363
54364
54365
54366
54367
54368
54369
54370
54371
54372
54373
54374
54375
54376
54377
54378
54379
54380
54381
54382
54383
54384
.....
55340
55341
55342
55343
55344
55345
55346
55347
55348
55349
55350
55351
55352
55353
55354
55355
55356





55357
55358
55359
55360
55361
55362
55363
55364
55365
.....
55388
55389
55390
55391
55392
55393
55394
55395

55396
55397
55398
55399
55400
55401
55402
55403
55404
55405
55406
55407
55408

55409
55410
55411
55412
55413
55414
55415
55416
55417
55418
55419
55420
55421
.....
55447
55448
55449
55450
55451
55452
55453
55454
55455
55456
55457
55458
55459
55460
55461
.....
55510
55511
55512
55513
55514
55515
55516





55517
55518
55519

55520
55521

55522
55523
55524
55525
55526
55527
55528
.....
55549
55550
55551
55552
55553
55554
55555

55556
55557
55558
55559
55560
55561
55562
.....
55585
55586
55587
55588
55589
55590
55591
55592
55593
55594
55595
55596
55597
55598
55599
.....
55611
55612
55613
55614
55615
55616
55617



55618
55619

55620
55621
55622
55623
55624
55625
55626
.....
55722
55723
55724
55725
55726
55727
55728
55729
55730
55731
55732
55733
55734
55735
55736
.....
55953
55954
55955
55956
55957
55958
55959



55960

55961
55962
55963
55964
55965
55966
55967
.....
56024
56025
56026
56027
56028
56029
56030
56031
56032
56033
56034
56035
56036
56037
56038
.....
56892
56893
56894
56895
56896
56897
56898
56899
56900
56901
56902
56903
56904
56905
56906
.....
57286
57287
57288
57289
57290
57291
57292
57293
57294
57295
57296
57297
57298
57299
57300
57301
57302





57303
57304
57305
57306
57307

57308
57309
57310
57311
57312
57313
57314
.....
57508
57509
57510
57511
57512
57513
57514
57515
57516
57517

57518
57519
57520

57521
57522
57523

57524
57525
57526
57527
57528
57529
57530
.....
57534
57535
57536
57537
57538
57539
57540
57541
57542
57543
57544
57545
57546
57547
57548
57549
57550
57551
57552
57553
57554
57555
57556
57557
57558
57559
57560
57561
57562
57563
57564
57565
57566
57567
.....
57570
57571
57572
57573
57574
57575
57576
57577
57578
57579
57580
57581
57582
57583
57584
57585
.....
57587
57588
57589
57590
57591
57592
57593
57594
57595
57596
57597
57598
57599
57600
57601
57602
.....
57615
57616
57617
57618
57619
57620
57621
57622
57623
57624
57625
57626
57627
57628
57629
.....
57633
57634
57635
57636
57637
57638
57639
57640
57641
57642
57643
57644
57645
57646
57647
57648
.....
57666
57667
57668
57669
57670
57671
57672
57673
57674
57675
57676
57677
57678
57679
57680
57681
57682
57683
57684
.....
57685
57686
57687
57688
57689
57690
57691
57692
57693
57694
57695
57696
57697
57698
57699
57700
57701
57702
57703
57704
57705
57706
57707
57708
57709
57710
57711
57712
57713
57714
57715
57716
57717
57718
57719
57720
57721
57722
57723
57724
57725
57726
57727
57728
57729
57730
57731
57732
57733
57734
.....
58224
58225
58226
58227
58228
58229
58230
58231
58232
58233
58234
58235







58236
58237
58238
58239
58240
58241
58242
58243
58244
58245
58246
58247
58248
58249
58250
58251
58252
58253
58254
58255
58256


58257
58258
58259
58260
58261
58262
58263
58264
58265
58266
58267
58268
58269
58270
58271
58272
58273
58274
58275
58276
58277
58278
58279
58280
58281
58282
58283
.....
58339
58340
58341
58342
58343
58344
58345
58346
58347
58348
58349
58350
58351
58352
58353
.....
58446
58447
58448
58449
58450
58451
58452
58453
58454
58455
58456
58457
58458
58459
58460
58461
58462
58463
58464
.....
58475
58476
58477
58478
58479
58480
58481
58482
58483
58484
58485
58486
58487
58488
58489
.....
58504
58505
58506
58507
58508
58509
58510

58511
58512
58513
58514
58515
58516
58517
.....
58581
58582
58583
58584
58585
58586
58587


















































































































58588
58589
58590
58591
58592
58593
58594
.....
58609
58610
58611
58612
58613
58614
58615
58616
58617
58618
58619
58620
58621
58622


58623
58624
58625
58626
58627
58628
58629
58630
58631
58632
58633
58634
58635
58636
58637
58638
58639
58640
58641
58642
58643
58644
58645
58646
58647
58648
58649
58650
58651
58652
58653
58654
58655
58656
58657
58658
58659
58660
58661
58662
58663
58664
58665
58666
58667
58668
58669
58670
58671

58672




58673
58674
58675
58676
58677
58678
58679
58680
58681
58682
58683
58684
58685

58686
58687
58688
58689
58690
58691
58692
58693
58694
58695
58696
58697

58698
58699
58700
58701

58702
58703
58704
58705
58706
58707
58708
58709
58710
.....
58719
58720
58721
58722
58723
58724
58725
58726
58727

58728
58729
58730
58731
58732
58733
58734
58735
58736
58737
58738
58739
58740
58741
58742
58743
58744
58745
58746
58747
58748
58749
58750
58751
58752
58753
58754
58755
58756
58757
58758
.....
58782
58783
58784
58785
58786
58787
58788

58789
58790
58791
58792
58793
58794
58795
.....
58796
58797
58798
58799
58800
58801
58802
58803
58804
58805
58806
58807
58808
58809
58810
58811



58812
58813
58814
58815
58816
58817
58818
.....
58874
58875
58876
58877
58878
58879
58880
58881
58882
58883
58884
58885
58886
58887
58888
58889
.....
59081
59082
59083
59084
59085
59086
59087
59088
59089
59090
59091
59092
59093

59094
59095
59096

59097
59098
59099
59100
59101
59102






59103
59104
59105
59106
59107
59108
59109
59110
59111
59112
59113
59114
59115
59116
59117
59118
59119
.....
59120
59121
59122
59123
59124
59125
59126
59127
59128
59129
59130
59131
59132
59133
59134
59135
59136
59137
59138
59139
59140
59141
59142
59143
59144
59145
59146
59147
59148
59149
59150
59151
59152
59153
59154
59155
59156
59157
59158
.....
59181
59182
59183
59184
59185
59186
59187
59188
59189
59190
59191
59192
59193
59194
59195
59196
59197
.....
59244
59245
59246
59247
59248
59249
59250

59251
59252
59253
59254
59255
59256
59257
.....
59320
59321
59322
59323
59324
59325
59326

59327
59328
59329
59330
59331
59332
59333
.....
59338
59339
59340
59341
59342
59343
59344
59345
59346

59347
59348
59349
59350
59351
59352
59353
59354
59355
59356
59357
59358
59359

59360
59361
59362

59363

59364
59365
59366


59367
59368
59369
59370
59371
59372
59373
59374
59375
59376
59377
59378
59379
59380
59381
59382
59383
59384
59385
59386
59387
59388
59389
59390
.....
59637
59638
59639
59640
59641
59642
59643
59644
59645
59646
59647
59648
59649
59650

59651
59652
59653
59654
59655
59656
59657
59658
59659
59660
59661
59662
59663
59664
59665
59666
59667
.....
59797
59798
59799
59800
59801
59802
59803
59804
59805
59806
59807
59808
59809
59810
59811
59812
59813
59814
59815
59816
59817
59818
59819
59820
59821

59822
59823
59824
59825
59826
59827
59828
.....
60150
60151
60152
60153
60154
60155
60156
60157
60158
60159
60160
60161
60162
60163
60164









60165
60166
60167








60168
60169
60170
60171
60172
60173
60174
.....
60204
60205
60206
60207
60208
60209
60210
60211
60212
60213
60214
60215
60216
60217
60218
.....
60416
60417
60418
60419
60420
60421
60422
60423
60424
60425
60426
60427
60428
60429
60430
.....
60470
60471
60472
60473
60474
60475
60476
60477
60478
60479
60480
60481
60482
60483
60484
.....
60703
60704
60705
60706
60707
60708
60709
60710
60711
60712
60713
60714
60715
60716
60717
.....
60834
60835
60836
60837
60838
60839
60840
60841
60842
60843
60844
60845
60846
60847
60848
.....
60922
60923
60924
60925
60926
60927
60928
60929
60930
60931
60932
60933
60934
60935
60936
.....
61122
61123
61124
61125
61126
61127
61128

61129
61130
61131
61132
61133
61134
61135
61136
61137
61138
61139
61140
61141
61142
.....
61267
61268
61269
61270
61271
61272
61273
61274
61275
61276
61277
61278
61279
61280
61281
.....
61329
61330
61331
61332
61333
61334
61335
61336
61337
61338
61339
61340
61341
61342
61343
.....
61345
61346
61347
61348
61349
61350
61351
61352
61353
61354
61355
61356
61357
61358
61359
61360
61361
61362
61363
61364
61365
61366
61367
61368
61369
61370
61371
61372
61373
61374
.....
61377
61378
61379
61380
61381
61382
61383
61384
61385
61386
61387
61388
61389
61390
61391
61392
61393




61394
61395
61396
61397
61398
61399
61400
61401
61402
61403
61404
61405
61406
61407
61408
61409
.....
61458
61459
61460
61461
61462
61463
61464

61465
61466

61467
61468
61469
61470
61471
61472
61473
61474
61475
61476
61477
61478
61479
61480
61481
61482
61483
61484
61485
61486
61487
61488
.....
61666
61667
61668
61669
61670
61671
61672
61673
61674
61675
61676
61677
61678
61679
61680
.....
61698
61699
61700
61701
61702
61703
61704
61705
61706
61707
61708
61709
61710
61711
61712
.....
61743
61744
61745
61746
61747
61748
61749
61750
61751
61752
61753
61754
61755
61756
61757
.....
61811
61812
61813
61814
61815
61816
61817
61818
61819
61820
61821
61822
61823
61824
61825
.....
61882
61883
61884
61885
61886
61887
61888
61889
61890
61891
61892
61893
61894
61895
61896
61897
61898
61899
.....
61914
61915
61916
61917
61918
61919
61920
61921
61922
61923
61924
61925
61926
61927
61928

61929
61930
61931
61932

61933

61934
61935
61936
61937
61938
61939
61940


61941
61942
61943
61944
61945
61946
61947
.....
61958
61959
61960
61961
61962
61963
61964
61965
61966
61967
61968
61969
61970
61971
61972
.....
61994
61995
61996
61997
61998
61999
62000
62001
62002
62003
62004
62005
62006
62007
62008
.....
62009
62010
62011
62012
62013
62014
62015

62016
62017
62018
62019
62020
62021
62022
62023
62024
62025
62026
62027
.....
62055
62056
62057
62058
62059
62060
62061
62062
62063
62064
62065
62066
62067
62068
62069
.....
62190
62191
62192
62193
62194
62195
62196

62197

62198
62199
62200
62201
62202
62203
62204
.....
62220
62221
62222
62223
62224
62225
62226
62227
62228
62229
62230
62231
62232
62233
62234
.....
62291
62292
62293
62294
62295
62296
62297
62298
62299
62300
62301
62302
62303
62304
62305
.....
62353
62354
62355
62356
62357
62358
62359
62360
62361
62362
62363
62364
62365
62366
62367
.....
62389
62390
62391
62392
62393
62394
62395
62396
62397
62398
62399
62400
62401
62402
62403
.....
62405
62406
62407
62408
62409
62410
62411
62412
62413
62414
62415
62416
62417
62418
62419
62420
.....
62519
62520
62521
62522
62523
62524
62525
62526
62527
62528
62529
62530
62531
62532
62533
62534
.....
62548
62549
62550
62551
62552
62553
62554
62555
62556
62557
62558
62559
62560
62561
62562
62563
62564
62565
62566
62567
62568
.....
62578
62579
62580
62581
62582
62583
62584
62585
62586
62587
62588
62589
62590
62591
62592
62593
62594
62595
62596
62597
62598
62599
62600
62601
62602
62603
62604
62605
62606
62607
62608
62609
62610
62611
62612
62613
62614
62615
62616
62617
62618



62619
62620
62621
62622
62623
62624
62625
62626
62627
62628
62629
62630
62631
62632
62633
62634
62635
.....
63144
63145
63146
63147
63148
63149
63150
63151
63152
63153
63154
63155
63156
63157
63158
63159
63160
.....
63312
63313
63314
63315
63316
63317
63318
63319
63320
63321
63322
63323
63324
63325
63326
.....
63717
63718
63719
63720
63721
63722
63723
63724
63725
63726
63727
63728
63729
63730
63731
63732
63733
63734
63735
63736
63737
63738
63739
63740
63741
63742
63743
63744
63745
63746
63747
63748
63749
63750
.....
64243
64244
64245
64246
64247
64248
64249
64250
64251
64252
64253
64254
64255
64256
64257
64258
64259
.....
64286
64287
64288
64289
64290
64291
64292
64293
64294
64295
64296
64297
64298
64299
64300
64301
64302
64303
64304
64305
64306
64307
64308
64309
64310

64311
64312
64313
64314
64315
64316
64317
64318
64319
.....
64422
64423
64424
64425
64426
64427
64428
64429
64430


64431
64432
64433








64434
64435
64436
64437
64438
64439
64440
64441

64442
64443
64444
64445
64446
64447
64448
.....
64773
64774
64775
64776
64777
64778
64779
64780
64781
64782
64783
64784
64785
64786
64787
.....
65730
65731
65732
65733
65734
65735
65736
65737
65738
65739
65740
65741
65742
65743
65744
65745
65746
65747
65748
65749
65750
65751
65752
65753
65754
65755
.....
65874
65875
65876
65877
65878
65879
65880
65881
65882
65883
65884
65885
65886
65887
65888
.....
66129
66130
66131
66132
66133
66134
66135
66136
66137
66138
66139
66140
66141
66142
66143
66144
66145
66146
66147
66148
66149
66150
.....
66161
66162
66163
66164
66165
66166
66167
66168
66169
66170
66171
66172
66173
66174
66175
66176
66177
66178
.....
66186
66187
66188
66189
66190
66191
66192
66193
66194
66195
66196
66197
66198
66199
66200
.....
66235
66236
66237
66238
66239
66240
66241
66242
66243
66244
66245
66246
66247
66248
66249
66250
66251
66252
66253
66254
66255
66256
66257
66258
66259
66260
66261
66262
66263
66264
66265
66266
66267
66268
.....
66280
66281
66282
66283
66284
66285
66286

66287
66288
66289
66290
66291
66292
66293
.....
66550
66551
66552
66553
66554
66555
66556
66557
66558
66559
66560
66561
66562
66563
66564
66565
66566
66567
66568
66569
66570
66571
66572

66573
66574
66575
66576
66577
66578
66579


66580
66581
66582
66583
66584
66585
66586
.....
66823
66824
66825
66826
66827
66828
66829
66830
66831
66832
66833
66834
66835
66836
66837
.....
67069
67070
67071
67072
67073
67074
67075
67076


67077
67078
67079
67080




67081
67082
67083
67084
67085
67086
67087
67088
67089
67090
67091
67092
.....
67159
67160
67161
67162
67163
67164
67165
67166
67167









67168
67169
67170
67171
67172
67173
67174
.....
67247
67248
67249
67250
67251
67252
67253
67254
67255
67256
67257
67258
67259
67260
67261
.....
67304
67305
67306
67307
67308
67309
67310
67311
67312
67313
67314
67315
67316
67317
67318
67319
67320
67321
67322
67323
67324
67325
67326
67327
67328
67329
67330
67331
67332
67333
67334
67335
67336
67337
67338
67339
67340
67341
67342
67343
67344
67345
67346
67347
67348
67349
67350
67351
67352
67353
67354
67355
67356
67357
67358
67359
67360
67361
67362
67363
67364
67365
67366
67367
67368
67369
67370
67371
67372
67373
67374
67375
67376
67377
67378
67379
67380
67381
67382
67383
67384
67385
67386
67387
67388
67389
67390
67391
67392
67393
67394
67395
67396
67397
.....
67426
67427
67428
67429
67430
67431
67432

67433
67434
67435
67436
67437
67438
67439
67440
67441


67442
67443
67444
67445
67446
67447
67448
67449
.....
67452
67453
67454
67455
67456
67457
67458
67459
67460
67461
67462
67463
67464
67465
67466
.....
67611
67612
67613
67614
67615
67616
67617

67618
67619
67620
67621


67622
67623
67624
67625
67626
67627
67628
.....
67680
67681
67682
67683
67684
67685
67686


67687
67688
67689
67690
67691
67692
67693
67694
.....
67764
67765
67766
67767
67768
67769
67770
67771
67772
67773
67774
67775
67776
67777
67778
.....
67958
67959
67960
67961
67962
67963
67964









67965
67966
67967
67968
67969
67970
67971
.....
68006
68007
68008
68009
68010
68011
68012
68013
68014
68015
68016
68017
68018
68019
68020
.....
68031
68032
68033
68034
68035
68036
68037

68038
68039
68040






68041
68042
68043
68044
68045
68046
68047
.....
68091
68092
68093
68094
68095
68096
68097
68098
68099
68100
68101
68102
68103
68104
68105
.....
68135
68136
68137
68138
68139
68140
68141
68142
68143
68144
68145
68146
68147
68148
68149
.....
68258
68259
68260
68261
68262
68263
68264
68265
68266




















68267
68268
68269
68270
68271
68272
68273
.....
68660
68661
68662
68663
68664
68665
68666
68667
68668
68669
68670
68671
68672
68673
68674
.....
68782
68783
68784
68785
68786
68787
68788

68789
68790
68791
68792
68793
68794
68795
68796
.....
68868
68869
68870
68871
68872
68873
68874
68875
68876
68877
68878
68879
68880
68881
68882
.....
69006
69007
69008
69009
69010
69011
69012


69013
69014
69015
69016
69017
69018

69019
69020
69021
69022
69023
69024
69025
.....
69085
69086
69087
69088
69089
69090
69091
69092
69093
69094
69095
69096
69097
69098
69099
.....
69165
69166
69167
69168
69169
69170
69171

69172
69173
69174
69175
69176
69177
69178
69179
69180
69181
69182
69183
69184
69185
69186
69187
69188
69189

69190
69191
69192
69193
69194
69195
69196
69197
69198
69199
.....
69335
69336
69337
69338
69339
69340
69341
69342

69343
69344
69345
69346

69347
69348
69349
69350
69351
69352
69353
69354
69355
69356
69357
69358
69359
69360
.....
69390
69391
69392
69393
69394
69395
69396

69397
69398
69399
69400
69401
69402
69403
69404
.....
69487
69488
69489
69490
69491
69492
69493
69494
69495
69496
69497


69498

69499
69500
69501
69502
69503
69504
69505
69506
69507
69508
69509
69510
69511
69512
69513
69514
69515
69516

69517
69518
69519
69520
69521
69522
69523
69524
69525
69526
69527
69528
69529
69530
69531
69532
69533
69534
69535
69536
69537
69538
69539
69540
69541
69542
69543
69544
69545
69546
69547
69548
69549
69550
69551
69552
69553
69554
69555

69556
69557
69558
69559
69560
69561
69562
69563
69564
69565




69566
69567
69568
69569
69570
69571
69572
.....
69578
69579
69580
69581
69582
69583
69584
69585

69586
69587
69588
69589
69590
69591
69592
.....
69595
69596
69597
69598
69599
69600
69601



69602
69603
69604
69605
69606
69607
69608
.....
69615
69616
69617
69618
69619
69620
69621



69622
69623
69624
69625
69626
69627
69628
.....
69652
69653
69654
69655
69656
69657
69658
69659
69660
69661
69662
69663
69664
69665
69666
.....
69712
69713
69714
69715
69716
69717
69718
69719
69720
69721
69722
69723
69724
69725
69726
.....
69943
69944
69945
69946
69947
69948
69949
69950
69951
69952
69953
69954
69955
69956
69957
.....
70002
70003
70004
70005
70006
70007
70008
70009
70010
70011
70012
70013
70014
70015
70016
.....
70023
70024
70025
70026
70027
70028
70029
70030
70031
70032
70033
70034
70035
70036

70037
70038
70039
70040
70041
70042
70043
.....
70051
70052
70053
70054
70055
70056
70057
70058
70059
70060
70061
70062
70063
70064
70065
70066

70067
70068
70069
70070
70071
70072
70073
70074
70075
70076
70077
70078
70079
70080
70081
70082
70083
70084
70085
70086
70087
70088
.....
70116
70117
70118
70119
70120
70121
70122
70123
70124
70125
70126
70127
70128
70129
70130
.....
71133
71134
71135
71136
71137
71138
71139
71140
71141
71142
71143
71144
71145
71146
71147
.....
71265
71266
71267
71268
71269
71270
71271
71272
71273
71274
71275
71276



71277
71278
71279
71280
71281
71282
71283
71284
71285
71286
.....
71490
71491
71492
71493
71494
71495
71496
71497
71498
71499
71500
71501
71502
71503
71504
.....
71652
71653
71654
71655
71656
71657
71658
71659
71660
71661
71662
71663
71664
71665
71666
71667
71668
71669
71670
71671
71672
71673
.....
72200
72201
72202
72203
72204
72205
72206
72207
72208
72209
72210
72211
72212
72213
72214
.....
72273
72274
72275
72276
72277
72278
72279
72280
72281
72282
72283
72284
72285
72286
72287
.....
72570
72571
72572
72573
72574
72575
72576
72577
72578
72579
72580
72581
72582
72583
72584
.....
72683
72684
72685
72686
72687
72688
72689

72690
72691
72692
72693
72694
72695
72696
.....
72772
72773
72774
72775
72776
72777
72778

72779
72780
72781
72782
72783
72784
72785
72786
.....
72794
72795
72796
72797
72798
72799
72800
72801
72802
72803
72804
72805
72806
72807
72808
72809
72810
72811
72812
72813
72814
72815
72816
72817
72818
.....
73084
73085
73086
73087
73088
73089
73090
73091
73092
73093
73094
73095

73096
73097
73098
73099
73100
73101
73102
.....
73227
73228
73229
73230
73231
73232
73233


73234
73235
73236
73237
73238
73239
73240
.....
73329
73330
73331
73332
73333
73334
73335


73336
73337
73338
73339
73340
73341
73342
.....
73404
73405
73406
73407
73408
73409
73410
73411
73412
73413
73414
73415
73416
73417
73418
.....
73584
73585
73586
73587
73588
73589
73590
73591
73592
73593
73594
73595
73596
73597
73598
73599
73600
73601
73602
73603
73604
73605
73606
73607
73608
73609
73610
73611
73612
73613
73614
73615
73616
73617
73618
73619
73620
73621
73622
73623
73624
73625
73626
73627
73628
73629
73630
73631
73632
73633
.....
73812
73813
73814
73815
73816
73817
73818

73819
73820
73821
73822
73823
73824
73825
.....
73964
73965
73966
73967
73968
73969
73970

73971
73972
73973
73974
73975
73976
73977
.....
74581
74582
74583
74584
74585
74586
74587
74588
74589
74590
74591
74592
74593
74594
74595
.....
74737
74738
74739
74740
74741
74742
74743

74744
74745
74746
74747
74748
74749
74750
.....
74785
74786
74787
74788
74789
74790
74791

74792
74793
74794
74795
74796
74797
74798
74799
.....
75492
75493
75494
75495
75496
75497
75498
75499
75500
75501
75502
75503
75504
75505
75506
.....
75945
75946
75947
75948
75949
75950
75951






75952
75953
75954
75955
75956
75957
75958
.....
76056
76057
76058
76059
76060
76061
76062



76063
76064
76065
76066
76067
76068
76069
.....
76606
76607
76608
76609
76610
76611
76612
76613
76614
76615
76616
76617
76618
76619
76620
76621
76622
76623
76624
76625
.....
76837
76838
76839
76840
76841
76842
76843

76844
76845
76846
76847
76848
76849
76850
.....
76876
76877
76878
76879
76880
76881
76882

76883
76884
76885
76886
76887
76888

76889
76890
76891
76892
76893
76894
76895
.....
77146
77147
77148
77149
77150
77151
77152
77153
77154
77155
77156
77157
77158
77159
77160
.....
77268
77269
77270
77271
77272
77273
77274
77275
77276
77277
77278
77279
77280
77281
77282
.....
77299
77300
77301
77302
77303
77304
77305

77306
77307
77308
77309
77310
77311
77312
.....
77325
77326
77327
77328
77329
77330
77331

77332
77333
77334
77335
77336
77337
77338
77339

77340
77341
77342
77343
77344
77345
77346
.....
77523
77524
77525
77526
77527
77528
77529
77530
77531
77532
77533
77534
77535
77536
77537
.....
77698
77699
77700
77701
77702
77703
77704
77705
77706
77707
77708
77709
77710
77711
77712
77713
77714
77715
77716
77717
77718
77719
77720
77721
77722
77723
77724
77725
77726
77727
77728
77729
77730
77731
77732
77733
77734
77735
77736
77737
77738
77739
77740
77741
77742
77743
77744
77745
77746
77747
77748
77749
77750
77751
77752
77753
.....
77813
77814
77815
77816
77817
77818
77819
77820
77821
77822
77823
77824
77825
77826
77827
.....
77847
77848
77849
77850
77851
77852
77853
77854
77855
77856
77857
77858
77859
77860
77861
77862
77863
77864
77865
77866
77867
.....
77894
77895
77896
77897
77898
77899
77900
77901
77902
77903
77904
77905
77906
77907
77908
.....
78168
78169
78170
78171
78172
78173
78174
78175
78176
78177
78178
78179
78180
78181
78182
.....
78395
78396
78397
78398
78399
78400
78401
78402
78403
78404
78405
78406
78407
78408
78409
.....
78572
78573
78574
78575
78576
78577
78578
78579
78580
78581
78582
78583
78584
78585
78586
.....
78771
78772
78773
78774
78775
78776
78777
78778
78779
78780
78781
78782
78783
78784
78785
.....
78813
78814
78815
78816
78817
78818
78819

78820
78821
78822
78823
78824
78825
78826
78827
.....
79103
79104
79105
79106
79107
79108
79109
79110
79111
79112
79113
79114
79115
79116
79117
79118
79119
79120
79121
79122
79123
79124
.....
79127
79128
79129
79130
79131
79132
79133
79134
79135
79136
79137
79138
79139
79140
79141
.....
79206
79207
79208
79209
79210
79211
79212
79213
79214
79215
79216
79217
79218
79219
79220
.....
79232
79233
79234
79235
79236
79237
79238
79239
79240
79241
79242
79243
79244
79245
79246
.....
79270
79271
79272
79273
79274
79275
79276
79277
79278
79279
79280
79281
79282
79283
79284
.....
79287
79288
79289
79290
79291
79292
79293
79294
79295
79296
79297
79298
79299
79300
79301
.....
79460
79461
79462
79463
79464
79465
79466
79467
79468
79469
79470
79471
79472
79473
79474
79475

79476
79477
79478
79479
79480
79481
79482

79483
79484
79485
79486
79487
79488
79489
.....
79584
79585
79586
79587
79588
79589
79590
79591
79592
79593
79594
79595
79596
79597
79598
79599
79600
.....
79674
79675
79676
79677
79678
79679
79680
79681
79682
79683
79684
79685
79686
79687
79688
.....
79696
79697
79698
79699
79700
79701
79702


79703
79704
79705
79706
79707
79708
79709
79710
79711
79712
79713
79714
79715
79716
79717
79718
79719
79720
79721
79722
79723
79724
79725
79726
79727
.....
79757
79758
79759
79760
79761
79762
79763
79764
79765
79766
79767





79768
79769
79770
79771
79772
79773
79774
.....
79842
79843
79844
79845
79846
79847
79848

79849
79850
79851
79852
79853
79854
79855
.....
80047
80048
80049
80050
80051
80052
80053
80054
80055
80056
80057
80058
80059
80060
80061
.....
80610
80611
80612
80613
80614
80615
80616
80617
80618
80619
80620
80621
80622
80623
80624
80625
80626
80627
80628
80629
80630
80631
80632
80633
.....
80636
80637
80638
80639
80640
80641
80642
80643
80644
80645
80646
80647
80648
80649
80650
80651
80652
80653
.....
80821
80822
80823
80824
80825
80826
80827
80828
80829
80830

80831
80832
80833
80834
80835
80836
80837
80838
80839
.....
80968
80969
80970
80971
80972
80973
80974
80975
80976
80977
80978
80979
80980
80981
80982
80983
80984

80985
80986
80987
80988
80989
80990
80991
.....
81219
81220
81221
81222
81223
81224
81225

81226
81227
81228
81229
81230
81231
81232
.....
81249
81250
81251
81252
81253
81254
81255
81256
81257
81258
81259

81260


81261
81262
81263
81264
81265
81266
81267
.....
81754
81755
81756
81757
81758
81759
81760
81761
81762
81763
81764
81765
81766
81767
81768
.....
82067
82068
82069
82070
82071
82072
82073
82074






















































































82075

























































































































































82076
82077
82078
82079
82080
82081
82082
.....
82085
82086
82087
82088
82089
82090
82091
82092
82093
82094
82095
82096
82097
82098
82099
82100
82101
82102
82103
82104
82105
82106
82107
82108
82109
82110
82111






82112
82113
82114
82115
82116
82117
82118
82119
82120
82121
82122
82123
82124
82125
82126
82127
82128
82129
82130
82131
82132
82133
82134
82135
82136
82137
82138
82139
82140
82141
82142
82143
82144
82145
82146
82147
82148
82149
82150
82151
82152
82153
82154
82155
82156
82157
82158
82159
82160
82161
82162
82163
82164
82165
82166
82167
82168
82169
82170
82171
82172
82173
82174
82175
82176
82177
82178
82179
82180
82181
82182
82183
82184
82185
82186
82187
82188
82189
82190
82191
82192
82193
82194
82195
82196
82197
82198
82199
82200
82201
82202
82203
82204
82205
82206
.....
82207
82208
82209
82210
82211
82212
82213
82214
82215
82216
82217
82218
82219
82220
82221
82222
82223
82224
82225
82226
82227
82228
.....
82254
82255
82256
82257
82258
82259
82260
82261
82262
82263
82264
82265
82266
82267
82268
82269
82270
82271
82272





82273
82274
82275

82276

82277
82278

82279
82280
82281
82282

82283
82284
82285
82286
82287
82288
82289
82290
82291
82292
82293
82294




82295
82296
82297
82298
82299
82300
82301
.....
82319
82320
82321
82322
82323
82324
82325
82326
82327
82328
82329
82330
82331
82332
82333
.....
82337
82338
82339
82340
82341
82342
82343
82344
82345
82346
82347
82348
82349
82350
82351
.....
82355
82356
82357
82358
82359
82360
82361







82362
82363
82364
82365
82366
82367
82368
.....
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/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.6.12.  By combining all the individual C code files into this 
** single large file, the entire code can be compiled as a one translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% are more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
** programs, you need this file and the "sqlite3.h" header file that defines
** the programming interface to the SQLite library.  (If you do not have 
** the "sqlite3.h" header file at hand, you will find a copy in the first
** 5487 lines past this header comment.)  Additional code files may be
** needed if you want a wrapper to interface SQLite with your choice of
** programming language.  The code for the "sqlite3" command-line shell
** is also in a separate file.  This file contains only code for the core
** SQLite library.
**
** This amalgamation was generated on 2009-03-31 13:00:09 UTC.
*/
#define SQLITE_CORE 1
#define SQLITE_AMALGAMATION 1
#ifndef SQLITE_PRIVATE
# define SQLITE_PRIVATE static
#endif
#ifndef SQLITE_API
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.848 2009/03/25 16:51:43 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
................................................................................
#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+\
    defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+\
    defined(SQLITE_POW2_MEMORY_SIZE)==0
# define SQLITE_SYSTEM_MALLOC 1
#endif

/*
** If SQLITE_MALLOC_SOFT_LIMIT is defined, then try to keep the
** sizes of memory allocations below this value where possible.
*/
#if defined(SQLITE_POW2_MEMORY_SIZE) && !defined(SQLITE_MALLOC_SOFT_LIMIT)
# define SQLITE_MALLOC_SOFT_LIMIT 1024
#endif

/*
** We need to define _XOPEN_SOURCE as follows in order to enable
** recursive mutexes on most Unix systems.  But Mac OS X is different.
** The _XOPEN_SOURCE define causes problems for Mac OS X we are told,
................................................................................
*/
#if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST)
# define TESTONLY(X)  X
#else
# define TESTONLY(X)
#endif















/*
** The ALWAYS and NEVER macros surround boolean expressions which 
** are intended to always be true or false, respectively.  Such
** expressions could be omitted from the code completely.  But they
** are included in a few cases in order to enhance the resilience
** of SQLite to unexpected behavior - to make the code "self-healing"
** or "ductile" rather than being "brittle" and crashing at the first
................................................................................
# define likely(X)    __builtin_expect((X),1)
# define unlikely(X)  __builtin_expect((X),0)
#else
# define likely(X)    !!(X)
# define unlikely(X)  !!(X)
#endif

/*
** Sometimes we need a small amount of code such as a variable initialization
** to setup for a later assert() statement.  We do not want this code to
** appear when assert() is disabled.  The following macro is therefore
** used to contain that setup code.  The "VVA" acronym stands for
** "Verification, Validation, and Accreditation".  In other words, the
** code within VVA_ONLY() will only run during verification processes.
*/
#ifndef NDEBUG
# define VVA_ONLY(X)  X
#else
# define VVA_ONLY(X)
#endif

/************** Include sqlite3.h in the middle of sqliteInt.h ***************/
/************** Begin file sqlite3.h *****************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
................................................................................
** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite.h.in,v 1.436 2009/03/20 13:15:30 drh Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.
................................................................................
** The Z value is the release number and is incremented with
** each release but resets back to 0 whenever Y is incremented.
**
** See also: [sqlite3_libversion()] and [sqlite3_libversion_number()].
**
** Requirements: [H10011] [H10014]
*/
#define SQLITE_VERSION         "3.6.12"
#define SQLITE_VERSION_NUMBER  3006012

/*
** CAPI3REF: Run-Time Library Version Numbers {H10020} <S60100>
** KEYWORDS: sqlite3_version
**
** These features provide the same information as the [SQLITE_VERSION]
** and [SQLITE_VERSION_NUMBER] #defines in the header, but are associated
................................................................................
#define SQLITE_IOERR_BLOCKED           (SQLITE_IOERR | (11<<8))
#define SQLITE_IOERR_NOMEM             (SQLITE_IOERR | (12<<8))
#define SQLITE_IOERR_ACCESS            (SQLITE_IOERR | (13<<8))
#define SQLITE_IOERR_CHECKRESERVEDLOCK (SQLITE_IOERR | (14<<8))
#define SQLITE_IOERR_LOCK              (SQLITE_IOERR | (15<<8))
#define SQLITE_IOERR_CLOSE             (SQLITE_IOERR | (16<<8))
#define SQLITE_IOERR_DIR_CLOSE         (SQLITE_IOERR | (17<<8))

#define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED | (1<<8) )

/*
** CAPI3REF: Flags For File Open Operations {H10230} <H11120> <H12700>
**
** These bit values are intended for use in the
** 3rd parameter to the [sqlite3_open_v2()] interface and
................................................................................
**
** When SQLite invokes the xSync() method of an
** [sqlite3_io_methods] object it uses a combination of
** these integer values as the second argument.
**
** When the SQLITE_SYNC_DATAONLY flag is used, it means that the
** sync operation only needs to flush data to mass storage.  Inode
** information need not be flushed. The SQLITE_SYNC_NORMAL flag means
** to use normal fsync() semantics. The SQLITE_SYNC_FULL flag means

** to use Mac OS X style fullsync instead of fsync().
*/
#define SQLITE_SYNC_NORMAL        0x00002
#define SQLITE_SYNC_FULL          0x00003
#define SQLITE_SYNC_DATAONLY      0x00010

/*
................................................................................
**
** A call to sqlite3_initialize() is an "effective" call if it is
** the first time sqlite3_initialize() is invoked during the lifetime of
** the process, or if it is the first time sqlite3_initialize() is invoked
** following a call to sqlite3_shutdown().  Only an effective call
** of sqlite3_initialize() does any initialization.  All other calls
** are harmless no-ops.





**
** Among other things, sqlite3_initialize() shall invoke
** sqlite3_os_init().  Similarly, sqlite3_shutdown()
** shall invoke sqlite3_os_end().
**
** The sqlite3_initialize() routine returns [SQLITE_OK] on success.
** If for some reason, sqlite3_initialize() is unable to initialize
................................................................................
** This function returns the number of database rows that were changed
** or inserted or deleted by the most recently completed SQL statement
** on the [database connection] specified by the first parameter.
** Only changes that are directly specified by the [INSERT], [UPDATE],
** or [DELETE] statement are counted.  Auxiliary changes caused by
** triggers are not counted. Use the [sqlite3_total_changes()] function
** to find the total number of changes including changes caused by triggers.



**
** A "row change" is a change to a single row of a single table
** caused by an INSERT, DELETE, or UPDATE statement.  Rows that
** are changed as side effects of REPLACE constraint resolution,
** rollback, ABORT processing, DROP TABLE, or by any other
** mechanisms do not count as direct row changes.
**
** A "trigger context" is a scope of execution that begins and

** ends with the script of a trigger.  Most SQL statements are
** evaluated outside of any trigger.  This is the "top level"
** trigger context.  If a trigger fires from the top level, a
** new trigger context is entered for the duration of that one
** trigger.  Subtriggers create subcontexts for their duration.
**
** Calling [sqlite3_exec()] or [sqlite3_step()] recursively does
** not create a new trigger context.
................................................................................
** that also occurred at the top level.  Within the body of a trigger,
** the sqlite3_changes() interface can be called to find the number of
** changes in the most recently completed INSERT, UPDATE, or DELETE
** statement within the body of the same trigger.
** However, the number returned does not include changes
** caused by subtriggers since those have their own context.
**
** SQLite implements the command "DELETE FROM table" without a WHERE clause
** by dropping and recreating the table.  Doing so is much faster than going
** through and deleting individual elements from the table.  Because of this
** optimization, the deletions in "DELETE FROM table" are not row changes and
** will not be counted by the sqlite3_changes() or [sqlite3_total_changes()]
** functions, regardless of the number of elements that were originally
** in the table.  To get an accurate count of the number of rows deleted, use
** "DELETE FROM table WHERE 1" instead.  Or recompile using the
** [SQLITE_OMIT_TRUNCATE_OPTIMIZATION] compile-time option to disable the
** optimization on all queries.

**
** Requirements:
** [H12241] [H12243]
**
** If a separate thread makes changes on the same database connection
** while [sqlite3_changes()] is running then the value returned
** is unpredictable and not meaningful.
*/
SQLITE_API int sqlite3_changes(sqlite3*);

/*
** CAPI3REF: Total Number Of Rows Modified {H12260} <S10600>
**
** This function returns the number of row changes caused by INSERT,
** UPDATE or DELETE statements since the [database connection] was opened.
** The count includes all changes from all trigger contexts.  However,

** the count does not include changes used to implement REPLACE constraints,
** do rollbacks or ABORT processing, or DROP table processing.



** The changes are counted as soon as the statement that makes them is
** completed (when the statement handle is passed to [sqlite3_reset()] or
** [sqlite3_finalize()]).
**
** SQLite implements the command "DELETE FROM table" without a WHERE clause
** by dropping and recreating the table.  (This is much faster than going
** through and deleting individual elements from the table.)  Because of this
** optimization, the deletions in "DELETE FROM table" are not row changes and
** will not be counted by the sqlite3_changes() or [sqlite3_total_changes()]
** functions, regardless of the number of elements that were originally
** in the table.  To get an accurate count of the number of rows deleted, use
** "DELETE FROM table WHERE 1" instead.   Or recompile using the
** [SQLITE_OMIT_TRUNCATE_OPTIMIZATION] compile-time option to disable the
** optimization on all queries.
**
** See also the [sqlite3_changes()] interface.

**
** Requirements:
** [H12261] [H12263]
**
** If a separate thread makes changes on the same database connection
** while [sqlite3_total_changes()] is running then the value
** returned is unpredictable and not meaningful.
................................................................................
** to be interrupted and might continue to completion.
**
** An SQL operation that is interrupted will return [SQLITE_INTERRUPT].
** If the interrupted SQL operation is an INSERT, UPDATE, or DELETE
** that is inside an explicit transaction, then the entire transaction
** will be rolled back automatically.
**








** A call to sqlite3_interrupt() has no effect on SQL statements
** that are started after sqlite3_interrupt() returns.
**
** Requirements:
** [H12271] [H12272]
**
** If the database connection closes while [sqlite3_interrupt()]
** is running then bad things will likely happen.
*/
SQLITE_API void sqlite3_interrupt(sqlite3*);

/*
** CAPI3REF: Determine If An SQL Statement Is Complete {H10510} <S70200>
**
** These routines are useful for command-line input to determine if the
** currently entered text seems to form complete a SQL statement or
** if additional input is needed before sending the text into
** SQLite for parsing.  These routines return true if the input string
** appears to be a complete SQL statement.  A statement is judged to be
** complete if it ends with a semicolon token and is not a fragment of a
** CREATE TRIGGER statement.  Semicolons that are embedded within
** string literals or quoted identifier names or comments are not
** independent tokens (they are part of the token in which they are
** embedded) and thus do not count as a statement terminator.




**
** These routines do not parse the SQL statements thus
** will not detect syntactically incorrect SQL.






**
** Requirements: [H10511] [H10512]
**
** The input to [sqlite3_complete()] must be a zero-terminated
** UTF-8 string.
**
** The input to [sqlite3_complete16()] must be a zero-terminated
................................................................................
** then the [sqlite3_prepare_v2()] or equivalent call that triggered
** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
** requested is ok.  When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v2()] or equivalent call that triggered the
** authorizer will fail with an error message explaining that
** access is denied.  If the authorizer code is [SQLITE_READ]
** and the callback returns [SQLITE_IGNORE] then the
** [prepared statement] statement is constructed to substitute
** a NULL value in place of the table column that would have
** been read if [SQLITE_OK] had been returned.  The [SQLITE_IGNORE]
** return can be used to deny an untrusted user access to individual
** columns of a table.
**
** The first parameter to the authorizer callback is a copy of the third
** parameter to the sqlite3_set_authorizer() interface. The second parameter
** to the callback is an integer [SQLITE_COPY | action code] that specifies
** the particular action to be authorized. The third through sixth parameters
** to the callback are zero-terminated strings that contain additional
** details about the action to be authorized.
**











** An authorizer is used when [sqlite3_prepare | preparing]
** SQL statements from an untrusted source, to ensure that the SQL statements
** do not try to access data they are not allowed to see, or that they do not
** try to execute malicious statements that damage the database.  For
** example, an application may allow a user to enter arbitrary
** SQL queries for evaluation by a database.  But the application does
** not want the user to be able to make arbitrary changes to the
................................................................................
** When [sqlite3_prepare_v2()] is used to prepare a statement, the
** statement might be reprepared during [sqlite3_step()] due to a 
** schema change.  Hence, the application should ensure that the
** correct authorizer callback remains in place during the [sqlite3_step()].
**
** Note that the authorizer callback is invoked only during
** [sqlite3_prepare()] or its variants.  Authorization is not
** performed during statement evaluation in [sqlite3_step()].


**
** Requirements:
** [H12501] [H12502] [H12503] [H12504] [H12505] [H12506] [H12507] [H12510]
** [H12511] [H12512] [H12520] [H12521] [H12522]
*/
SQLITE_API int sqlite3_set_authorizer(
  sqlite3*,
................................................................................
** CAPI3REF: Compiling An SQL Statement {H13010} <S10000>
** KEYWORDS: {SQL statement compiler}
**
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.
**
** The first argument, "db", is a [database connection] obtained from a
** prior call to [sqlite3_open()], [sqlite3_open_v2()] or [sqlite3_open16()].

**
** The second argument, "zSql", is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare() and sqlite3_prepare_v2()
** interfaces use UTF-8, and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16.
**
** If the nByte argument is less than zero, then zSql is read up to the
................................................................................
** zSql string ends at either the first '\000' or '\u0000' character or
** the nByte-th byte, whichever comes first. If the caller knows
** that the supplied string is nul-terminated, then there is a small
** performance advantage to be gained by passing an nByte parameter that
** is equal to the number of bytes in the input string <i>including</i>
** the nul-terminator bytes.
**
** *pzTail is made to point to the first byte past the end of the
** first SQL statement in zSql.  These routines only compile the first
** statement in zSql, so *pzTail is left pointing to what remains
** uncompiled.
**
** *ppStmt is left pointing to a compiled [prepared statement] that can be
** executed using [sqlite3_step()].  If there is an error, *ppStmt is set
** to NULL.  If the input text contains no SQL (if the input is an empty
** string or a comment) then *ppStmt is set to NULL.
** {A13018} The calling procedure is responsible for deleting the compiled
** SQL statement using [sqlite3_finalize()] after it has finished with it.

**
** On success, [SQLITE_OK] is returned, otherwise an [error code] is returned.
**
** The sqlite3_prepare_v2() and sqlite3_prepare16_v2() interfaces are
** recommended for all new programs. The two older interfaces are retained
** for backwards compatibility, but their use is discouraged.
** In the "v2" interfaces, the prepared statement
................................................................................
**
** The name of the new collation sequence is specified as a UTF-8 string
** for sqlite3_create_collation() and sqlite3_create_collation_v2()
** and a UTF-16 string for sqlite3_create_collation16(). In all cases
** the name is passed as the second function argument.
**
** The third argument may be one of the constants [SQLITE_UTF8],
** [SQLITE_UTF16LE] or [SQLITE_UTF16BE], indicating that the user-supplied
** routine expects to be passed pointers to strings encoded using UTF-8,
** UTF-16 little-endian, or UTF-16 big-endian, respectively. The
** third argument might also be [SQLITE_UTF16_ALIGNED] to indicate that


** the routine expects pointers to 16-bit word aligned strings
** of UTF-16 in the native byte order of the host computer.
**
** A pointer to the user supplied routine must be passed as the fifth
** argument.  If it is NULL, this is the same as deleting the collation
** sequence (so that SQLite cannot call it anymore).
** Each time the application supplied function is invoked, it is passed
** as its first parameter a copy of the void* passed as the fourth argument
** to sqlite3_create_collation() or sqlite3_create_collation16().
................................................................................
** except that it takes an extra argument which is a destructor for
** the collation.  The destructor is called when the collation is
** destroyed and is passed a copy of the fourth parameter void* pointer
** of the sqlite3_create_collation_v2().
** Collations are destroyed when they are overridden by later calls to the
** collation creation functions or when the [database connection] is closed
** using [sqlite3_close()].


**
** Requirements:
** [H16603] [H16604] [H16606] [H16609] [H16612] [H16615] [H16618] [H16621]
** [H16624] [H16627] [H16630]
*/
SQLITE_API int sqlite3_create_collation(
  sqlite3*, 
................................................................................
**
** If this global variable is made to point to a string which is
** the name of a folder (a.k.a. directory), then all temporary files
** created by SQLite will be placed in that directory.  If this variable
** is a NULL pointer, then SQLite performs a search for an appropriate
** temporary file directory.
**
** It is not safe to modify this variable once a [database connection]



** has been opened.  It is intended that this variable be set once
** as part of process initialization and before any SQLite interface
** routines have been call and remain unchanged thereafter.











*/
SQLITE_API char *sqlite3_temp_directory;

/*
** CAPI3REF: Test For Auto-Commit Mode {H12930} <S60200>
** KEYWORDS: {autocommit mode}
**
................................................................................
typedef struct sqlite3_vtab sqlite3_vtab;
typedef struct sqlite3_index_info sqlite3_index_info;
typedef struct sqlite3_vtab_cursor sqlite3_vtab_cursor;
typedef struct sqlite3_module sqlite3_module;

/*
** CAPI3REF: Virtual Table Object {H18000} <S20400>
** KEYWORDS: sqlite3_module
** EXPERIMENTAL
**
** A module is a class of virtual tables.  Each module is defined
** by an instance of the following structure.  This structure consists
** mostly of methods for the module.
**
** This interface is experimental and is subject to change or
** removal in future releases of SQLite.





*/
struct sqlite3_module {
  int iVersion;
  int (*xCreate)(sqlite3*, void *pAux,
               int argc, const char *const*argv,
               sqlite3_vtab **ppVTab, char**);
  int (*xConnect)(sqlite3*, void *pAux,
................................................................................

/*
** CAPI3REF: Virtual Table Indexing Information {H18100} <S20400>
** KEYWORDS: sqlite3_index_info
** EXPERIMENTAL
**
** The sqlite3_index_info structure and its substructures is used to
** pass information into and receive the reply from the xBestIndex
** method of an sqlite3_module.  The fields under **Inputs** are the
** inputs to xBestIndex and are read-only.  xBestIndex inserts its
** results into the **Outputs** fields.
**
** The aConstraint[] array records WHERE clause constraints of the form:
**
** <pre>column OP expr</pre>
**
................................................................................
** get as many WHERE clause terms into the form shown above as possible.
** The aConstraint[] array only reports WHERE clause terms in the correct
** form that refer to the particular virtual table being queried.
**
** Information about the ORDER BY clause is stored in aOrderBy[].
** Each term of aOrderBy records a column of the ORDER BY clause.
**
** The xBestIndex method must fill aConstraintUsage[] with information
** about what parameters to pass to xFilter.  If argvIndex>0 then
** the right-hand side of the corresponding aConstraint[] is evaluated
** and becomes the argvIndex-th entry in argv.  If aConstraintUsage[].omit
** is true, then the constraint is assumed to be fully handled by the
** virtual table and is not checked again by SQLite.
**
** The idxNum and idxPtr values are recorded and passed into xFilter.


** sqlite3_free() is used to free idxPtr if needToFreeIdxPtr is true.
**
** The orderByConsumed means that output from xFilter will occur in
** the correct order to satisfy the ORDER BY clause so that no separate
** sorting step is required.
**
** The estimatedCost value is an estimate of the cost of doing the
** particular lookup.  A full scan of a table with N entries should have
** a cost of N.  A binary search of a table of N entries should have a
** cost of approximately log(N).
**
** This interface is experimental and is subject to change or
** removal in future releases of SQLite.
*/
struct sqlite3_index_info {
  /* Inputs */
  int nConstraint;           /* Number of entries in aConstraint */
  struct sqlite3_index_constraint {
     int iColumn;              /* Column on left-hand side of constraint */
     unsigned char op;         /* Constraint operator */
................................................................................
#define SQLITE_INDEX_CONSTRAINT_GE    32
#define SQLITE_INDEX_CONSTRAINT_MATCH 64

/*
** CAPI3REF: Register A Virtual Table Implementation {H18200} <S20400>
** EXPERIMENTAL
**
** This routine is used to register a new module name with a
** [database connection].  Module names must be registered before
** creating new virtual tables on the module, or before using
** preexisting virtual tables of the module.
**
** This interface is experimental and is subject to change or
** removal in future releases of SQLite.








*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_create_module(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *,    /* Methods for the module */
  void *                     /* Client data for xCreate/xConnect */
);

/*
** CAPI3REF: Register A Virtual Table Implementation {H18210} <S20400>
** EXPERIMENTAL
**
** This routine is identical to the [sqlite3_create_module()] method above,
** except that it allows a destructor function to be specified. It is
** even more experimental than the rest of the virtual tables API.


*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_create_module_v2(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *,    /* Methods for the module */
  void *,                    /* Client data for xCreate/xConnect */
  void(*xDestroy)(void*)     /* Module destructor function */
);

/*
** CAPI3REF: Virtual Table Instance Object {H18010} <S20400>
** KEYWORDS: sqlite3_vtab
** EXPERIMENTAL
**
** Every module implementation uses a subclass of the following structure
** to describe a particular instance of the module.  Each subclass will

** be tailored to the specific needs of the module implementation.
** The purpose of this superclass is to define certain fields that are
** common to all module implementations.
**
** Virtual tables methods can set an error message by assigning a
** string obtained from [sqlite3_mprintf()] to zErrMsg.  The method should
** take care that any prior string is freed by a call to [sqlite3_free()]
** prior to assigning a new string to zErrMsg.  After the error message
** is delivered up to the client application, the string will be automatically
** freed by sqlite3_free() and the zErrMsg field will be zeroed.  Note
** that sqlite3_mprintf() and sqlite3_free() are used on the zErrMsg field
** since virtual tables are commonly implemented in loadable extensions which
** do not have access to sqlite3MPrintf() or sqlite3Free().
**
** This interface is experimental and is subject to change or
** removal in future releases of SQLite.
*/
struct sqlite3_vtab {
  const sqlite3_module *pModule;  /* The module for this virtual table */
  int nRef;                       /* Used internally */
  char *zErrMsg;                  /* Error message from sqlite3_mprintf() */
  /* Virtual table implementations will typically add additional fields */
};

/*
** CAPI3REF: Virtual Table Cursor Object  {H18020} <S20400>
** KEYWORDS: sqlite3_vtab_cursor
** EXPERIMENTAL
**
** Every module implementation uses a subclass of the following structure
** to describe cursors that point into the virtual table and are used

** to loop through the virtual table.  Cursors are created using the



** xOpen method of the module.  Each module implementation will define
** the content of a cursor structure to suit its own needs.
**
** This superclass exists in order to define fields of the cursor that
** are common to all implementations.
**
** This interface is experimental and is subject to change or
** removal in future releases of SQLite.
*/
struct sqlite3_vtab_cursor {
  sqlite3_vtab *pVtab;      /* Virtual table of this cursor */
  /* Virtual table implementations will typically add additional fields */
};

/*
** CAPI3REF: Declare The Schema Of A Virtual Table {H18280} <S20400>
** EXPERIMENTAL
**
** The xCreate and xConnect methods of a module use the following API

** to declare the format (the names and datatypes of the columns) of
** the virtual tables they implement.
**
** This interface is experimental and is subject to change or
** removal in future releases of SQLite.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_declare_vtab(sqlite3*, const char *zCreateTable);

/*
** CAPI3REF: Overload A Function For A Virtual Table {H18300} <S20400>
** EXPERIMENTAL
**
** Virtual tables can provide alternative implementations of functions

** using the xFindFunction method.  But global versions of those functions
** must exist in order to be overloaded.
**
** This API makes sure a global version of a function with a particular
** name and number of parameters exists.  If no such function exists
** before this API is called, a new function is created.  The implementation
** of the new function always causes an exception to be thrown.  So
** the new function is not good for anything by itself.  Its only
** purpose is to be a placeholder function that can be overloaded
** by virtual tables.
**
** This API should be considered part of the virtual table interface,
** which is experimental and subject to change.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_overload_function(sqlite3*, const char *zFuncName, int nArg);

/*
** The interface to the virtual-table mechanism defined above (back up
** to a comment remarkably similar to this one) is currently considered
** to be experimental.  The interface might change in incompatible ways.
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the header file for the generic hash-table implemenation
** used in SQLite.
**
** $Id: hash.h,v 1.12 2008/10/10 17:41:29 drh Exp $
*/
#ifndef _SQLITE_HASH_H_
#define _SQLITE_HASH_H_

/* Forward declarations of structures. */
typedef struct Hash Hash;
typedef struct HashElem HashElem;

/* A complete hash table is an instance of the following structure.
** The internals of this structure are intended to be opaque -- client
** code should not attempt to access or modify the fields of this structure
** directly.  Change this structure only by using the routines below.
** However, many of the "procedures" and "functions" for modifying and
** accessing this structure are really macros, so we can't really make
** this structure opaque.













*/
struct Hash {
  unsigned int copyKey: 1;  /* True if copy of key made on insert */
  unsigned int htsize : 31; /* Number of buckets in the hash table */
  unsigned int count;       /* Number of entries in this table */
  HashElem *first;          /* The first element of the array */
  struct _ht {              /* the hash table */
    int count;                 /* Number of entries with this hash */
    HashElem *chain;           /* Pointer to first entry with this hash */
  } *ht;
};
................................................................................
/* Each element in the hash table is an instance of the following 
** structure.  All elements are stored on a single doubly-linked list.
**
** Again, this structure is intended to be opaque, but it can't really
** be opaque because it is used by macros.
*/
struct HashElem {
  HashElem *next, *prev;   /* Next and previous elements in the table */
  void *data;              /* Data associated with this element */
  void *pKey; int nKey;    /* Key associated with this element */
};

/*
** Access routines.  To delete, insert a NULL pointer.
*/
SQLITE_PRIVATE void sqlite3HashInit(Hash*, int copyKey);
SQLITE_PRIVATE void *sqlite3HashInsert(Hash*, const void *pKey, int nKey, void *pData);
SQLITE_PRIVATE void *sqlite3HashFind(const Hash*, const void *pKey, int nKey);
SQLITE_PRIVATE HashElem *sqlite3HashFindElem(const Hash*, const void *pKey, int nKey);
SQLITE_PRIVATE void sqlite3HashClear(Hash*);

/*
** Macros for looping over all elements of a hash table.  The idiom is
** like this:
**
**   Hash h;
................................................................................
**     SomeStructure *pData = sqliteHashData(p);
**     // do something with pData
**   }
*/
#define sqliteHashFirst(H)  ((H)->first)
#define sqliteHashNext(E)   ((E)->next)
#define sqliteHashData(E)   ((E)->data)
#define sqliteHashKey(E)    ((E)->pKey)
#define sqliteHashKeysize(E) ((E)->nKey)

/*
** Number of entries in a hash table
*/
#define sqliteHashCount(H)  ((H)->count)

#endif /* _SQLITE_HASH_H_ */

/************** End of hash.h ************************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include parse.h in the middle of sqliteInt.h *****************/
/************** Begin file parse.h *******************************************/
................................................................................
#define ROUND8(x)     (((x)+7)&~7)

/*
** Round down to the nearest multiple of 8
*/
#define ROUNDDOWN8(x) ((x)&~7)






/*
** An instance of the following structure is used to store the busy-handler
** callback for a given sqlite handle. 
**
** The sqlite.busyHandler member of the sqlite struct contains the busy
** callback for the database handle. Each pager opened via the sqlite
** handle is passed a pointer to sqlite.busyHandler. The busy-handler
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.  See comments in the source code for a detailed description
** of what each interface routine does.
**
** @(#) $Id: btree.h,v 1.111 2009/03/18 10:33:01 danielk1977 Exp $
*/
#ifndef _BTREE_H_
#define _BTREE_H_

/* TODO: This definition is just included so other modules compile. It
** needs to be revisited.
*/
................................................................................
#define BTREE_READWRITE    16  /* Open for both reading and writing */
#define BTREE_CREATE       32  /* Create the database if it does not exist */

SQLITE_PRIVATE int sqlite3BtreeClose(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetCacheSize(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeSetSafetyLevel(Btree*,int,int);
SQLITE_PRIVATE int sqlite3BtreeSyncDisabled(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree*,int,int);
SQLITE_PRIVATE int sqlite3BtreeGetPageSize(Btree*);
SQLITE_PRIVATE int sqlite3BtreeMaxPageCount(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeGetReserve(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetAutoVacuum(Btree *, int);
SQLITE_PRIVATE int sqlite3BtreeGetAutoVacuum(Btree *);
SQLITE_PRIVATE int sqlite3BtreeBeginTrans(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseOne(Btree*, const char *zMaster);
................................................................................
  int bias,
  int *pRes
);
SQLITE_PRIVATE int sqlite3BtreeCursorHasMoved(BtCursor*, int*);
SQLITE_PRIVATE int sqlite3BtreeDelete(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreeInsert(BtCursor*, const void *pKey, i64 nKey,
                                  const void *pData, int nData,
                                  int nZero, int bias);
SQLITE_PRIVATE int sqlite3BtreeFirst(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeEof(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreeFlags(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeKeySize(BtCursor*, i64 *pSize);
................................................................................
#endif

/*
** If we are not using shared cache, then there is no need to
** use mutexes to access the BtShared structures.  So make the
** Enter and Leave procedures no-ops.
*/
#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE
SQLITE_PRIVATE   void sqlite3BtreeEnter(Btree*);
SQLITE_PRIVATE   void sqlite3BtreeLeave(Btree*);
#ifndef NDEBUG
  /* This routine is used inside assert() statements only. */
SQLITE_PRIVATE   int sqlite3BtreeHoldsMutex(Btree*);
#endif



SQLITE_PRIVATE   void sqlite3BtreeEnterCursor(BtCursor*);
SQLITE_PRIVATE   void sqlite3BtreeLeaveCursor(BtCursor*);
SQLITE_PRIVATE   void sqlite3BtreeEnterAll(sqlite3*);
SQLITE_PRIVATE   void sqlite3BtreeLeaveAll(sqlite3*);
#ifndef NDEBUG
  /* This routine is used inside assert() statements only. */
SQLITE_PRIVATE   int sqlite3BtreeHoldsAllMutexes(sqlite3*);
#endif
SQLITE_PRIVATE   void sqlite3BtreeMutexArrayEnter(BtreeMutexArray*);
SQLITE_PRIVATE   void sqlite3BtreeMutexArrayLeave(BtreeMutexArray*);
SQLITE_PRIVATE   void sqlite3BtreeMutexArrayInsert(BtreeMutexArray*, Btree*);
#else
# define sqlite3BtreeEnter(X)
# define sqlite3BtreeLeave(X)
#ifndef NDEBUG
  /* This routine is used inside assert() statements only. */
# define sqlite3BtreeHoldsMutex(X) 1

#endif



# define sqlite3BtreeEnterCursor(X)
# define sqlite3BtreeLeaveCursor(X)
# define sqlite3BtreeEnterAll(X)
# define sqlite3BtreeLeaveAll(X)
#ifndef NDEBUG
  /* This routine is used inside assert() statements only. */
# define sqlite3BtreeHoldsAllMutexes(X) 1
#endif
# define sqlite3BtreeMutexArrayEnter(X)
# define sqlite3BtreeMutexArrayLeave(X)
# define sqlite3BtreeMutexArrayInsert(X,Y)



#endif


#endif /* _BTREE_H_ */

/************** End of btree.h ***********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
................................................................................
*************************************************************************
** Header file for the Virtual DataBase Engine (VDBE)
**
** This header defines the interface to the virtual database engine
** or VDBE.  The VDBE implements an abstract machine that runs a
** simple program to access and modify the underlying database.
**
** $Id: vdbe.h,v 1.140 2009/02/19 14:39:25 danielk1977 Exp $
*/
#ifndef _SQLITE_VDBE_H_
#define _SQLITE_VDBE_H_

/*
** A single VDBE is an opaque structure named "Vdbe".  Only routines
** in the source file sqliteVdbe.c are allowed to see the insides
................................................................................
#define OP_SCopy                                9
#define OP_Eq                                  74   /* same as TK_EQ       */
#define OP_OpenWrite                           10
#define OP_NotNull                             72   /* same as TK_NOTNULL  */
#define OP_If                                  11
#define OP_ToInt                              142   /* same as TK_TO_INT   */
#define OP_String8                             94   /* same as TK_STRING   */
#define OP_VRowid                              12
#define OP_CollSeq                             13
#define OP_OpenRead                            14
#define OP_Expire                              15
#define OP_AutoCommit                          16
#define OP_Gt                                  75   /* same as TK_GT       */
#define OP_Pagecount                           17
#define OP_IntegrityCk                         18
#define OP_Sort                                20
#define OP_Copy                                21
#define OP_Trace                               22
#define OP_Function                            23
#define OP_IfNeg                               24
#define OP_And                                 67   /* same as TK_AND      */
#define OP_Subtract                            85   /* same as TK_MINUS    */
#define OP_Noop                                25
#define OP_Return                              26
#define OP_Remainder                           88   /* same as TK_REM      */
#define OP_NewRowid                            27
#define OP_Multiply                            86   /* same as TK_STAR     */
#define OP_Variable                            28
#define OP_String                              29
#define OP_RealAffinity                        30
#define OP_VRename                             31
#define OP_ParseSchema                         32
#define OP_VOpen                               33
#define OP_Close                               34
#define OP_CreateIndex                         35
#define OP_IsUnique                            36
#define OP_NotFound                            37
#define OP_Int64                               38
#define OP_MustBeInt                           39
#define OP_Halt                                40
#define OP_Rowid                               41
#define OP_IdxLT                               42
#define OP_AddImm                              43
#define OP_Statement                           44
#define OP_RowData                             45
#define OP_MemMax                              46
#define OP_Or                                  66   /* same as TK_OR       */
#define OP_NotExists                           47
#define OP_Gosub                               48
#define OP_Divide                              87   /* same as TK_SLASH    */
#define OP_Integer                             49
#define OP_ToNumeric                          141   /* same as TK_TO_NUMERIC*/
#define OP_Prev                                50
#define OP_RowSetRead                          51
#define OP_Concat                              89   /* same as TK_CONCAT   */
#define OP_RowSetAdd                           52
#define OP_BitAnd                              80   /* same as TK_BITAND   */
#define OP_VColumn                             53
#define OP_CreateTable                         54
#define OP_Last                                55
#define OP_SeekLe                              56
#define OP_IsNull                              71   /* same as TK_ISNULL   */
#define OP_IncrVacuum                          57
#define OP_IdxRowid                            58
#define OP_ShiftRight                          83   /* same as TK_RSHIFT   */
#define OP_ResetCount                          59
#define OP_ContextPush                         60
#define OP_Yield                               61
#define OP_DropTrigger                         62
#define OP_DropIndex                           63
#define OP_IdxGE                               64
#define OP_IdxDelete                           65
#define OP_Vacuum                              68
#define OP_IfNot                               69
#define OP_DropTable                           70
#define OP_SeekLt                              79
#define OP_MakeRecord                          90
#define OP_ToBlob                             140   /* same as TK_TO_BLOB  */
#define OP_ResultRow                           91
#define OP_Delete                              92
#define OP_AggFinal                            95
#define OP_Compare                             96
#define OP_ShiftLeft                           82   /* same as TK_LSHIFT   */
#define OP_Goto                                97
#define OP_TableLock                           98
#define OP_Clear                               99
#define OP_Le                                  76   /* same as TK_LE       */
#define OP_VerifyCookie                       100
#define OP_AggStep                            101
#define OP_ToText                             139   /* same as TK_TO_TEXT  */
#define OP_Not                                 19   /* same as TK_NOT      */
#define OP_ToReal                             143   /* same as TK_TO_REAL  */
#define OP_SetNumColumns                      102
#define OP_Transaction                        103
#define OP_VFilter                            104
#define OP_Ne                                  73   /* same as TK_NE       */
#define OP_VDestroy                           105
#define OP_ContextPop                         106
#define OP_BitOr                               81   /* same as TK_BITOR    */
#define OP_Next                               107
#define OP_Count                              108
#define OP_IdxInsert                          109
#define OP_Lt                                  77   /* same as TK_LT       */
#define OP_SeekGe                             110
#define OP_Insert                             111
#define OP_Destroy                            112
#define OP_ReadCookie                         113

#define OP_LoadAnalysis                       114
#define OP_Explain                            115
#define OP_HaltIfNull                         116
#define OP_OpenPseudo                         117
#define OP_OpenEphemeral                      118
#define OP_Null                               119
#define OP_Move                               120
................................................................................
#define OPFLG_OUT2_PRERELEASE 0x0002  /* out2-prerelease: */
#define OPFLG_IN1             0x0004  /* in1:   P1 is an input */
#define OPFLG_IN2             0x0008  /* in2:   P2 is an input */
#define OPFLG_IN3             0x0010  /* in3:   P3 is an input */
#define OPFLG_OUT3            0x0020  /* out3:  P3 is an output */
#define OPFLG_INITIALIZER {\
/*   0 */ 0x00, 0x01, 0x00, 0x00, 0x10, 0x08, 0x02, 0x00,\
/*   8 */ 0x00, 0x04, 0x00, 0x05, 0x02, 0x00, 0x00, 0x00,\
/*  16 */ 0x00, 0x02, 0x00, 0x04, 0x01, 0x04, 0x00, 0x00,\
/*  24 */ 0x05, 0x00, 0x04, 0x02, 0x00, 0x02, 0x04, 0x00,\
/*  32 */ 0x00, 0x00, 0x00, 0x02, 0x11, 0x11, 0x02, 0x05,\
/*  40 */ 0x00, 0x02, 0x11, 0x04, 0x00, 0x00, 0x0c, 0x11,\
/*  48 */ 0x01, 0x02, 0x01, 0x21, 0x08, 0x00, 0x02, 0x01,\
/*  56 */ 0x11, 0x01, 0x02, 0x00, 0x00, 0x04, 0x00, 0x00,\
/*  64 */ 0x11, 0x00, 0x2c, 0x2c, 0x00, 0x05, 0x00, 0x05,\
/*  72 */ 0x05, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x11,\
/*  80 */ 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c,\
/*  88 */ 0x2c, 0x2c, 0x00, 0x00, 0x00, 0x04, 0x02, 0x00,\
/*  96 */ 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
/* 104 */ 0x01, 0x00, 0x00, 0x01, 0x02, 0x08, 0x11, 0x00,\
/* 112 */ 0x02, 0x02, 0x00, 0x00, 0x10, 0x00, 0x00, 0x02,\
/* 120 */ 0x00, 0x02, 0x01, 0x11, 0x00, 0x00, 0x05, 0x00,\
/* 128 */ 0x11, 0x05, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00,\
/* 136 */ 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04,\
}

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/
................................................................................
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, int);
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*);

#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
SQLITE_PRIVATE int sqlite3VdbeReleaseMemory(int);
#endif
SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack(KeyInfo*,int,const void*,
                                        UnpackedRecord*,int);
SQLITE_PRIVATE void sqlite3VdbeDeleteUnpackedRecord(UnpackedRecord*);
SQLITE_PRIVATE int sqlite3VdbeRecordCompare(int,const void*,UnpackedRecord*);


#ifndef NDEBUG
SQLITE_PRIVATE   void sqlite3VdbeComment(Vdbe*, const char*, ...);
# define VdbeComment(X)  sqlite3VdbeComment X
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite page cache
** subsystem.  The page cache subsystem reads and writes a file a page
** at a time and provides a journal for rollback.
**
** @(#) $Id: pager.h,v 1.100 2009/02/03 16:51:25 danielk1977 Exp $
*/

#ifndef _PAGER_H_
#define _PAGER_H_

/*
** Default maximum size for persistent journal files. A negative 
................................................................................
SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno,int);
SQLITE_PRIVATE int sqlite3PagerPageRefcount(DbPage*);
SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *); 
SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *); 

/* Functions used to manage pager transactions and savepoints. */
SQLITE_PRIVATE int sqlite3PagerPagecount(Pager*, int*);
SQLITE_PRIVATE int sqlite3PagerBegin(Pager*, int exFlag);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, int);
SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager*);
SQLITE_PRIVATE int sqlite3PagerRollback(Pager*);
SQLITE_PRIVATE int sqlite3PagerOpenSavepoint(Pager *pPager, int n);
SQLITE_PRIVATE int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint);

................................................................................
** statements.
*/
struct Schema {
  int schema_cookie;   /* Database schema version number for this file */
  Hash tblHash;        /* All tables indexed by name */
  Hash idxHash;        /* All (named) indices indexed by name */
  Hash trigHash;       /* All triggers indexed by name */
  Hash aFKey;          /* Foreign keys indexed by to-table */
  Table *pSeqTab;      /* The sqlite_sequence table used by AUTOINCREMENT */
  u8 file_format;      /* Schema format version for this file */
  u8 enc;              /* Text encoding used by this database */
  u16 flags;           /* Flags associated with this schema */
  int cache_size;      /* Number of pages to use in the cache */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3 *db;         /* "Owner" connection. See comment above */
................................................................................
  int nSavepoint;               /* Number of non-transaction savepoints */
  int nStatement;               /* Number of nested statement-transactions  */
  u8 isTransactionSavepoint;    /* True if the outermost savepoint is a TS */

#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
  /* The following variables are all protected by the STATIC_MASTER 
  ** mutex, not by sqlite3.mutex. They are used by code in notify.c. 







  */
  sqlite3 *pBlockingConnection; /* Connection that caused SQLITE_LOCKED */
  sqlite3 *pUnlockConnection;           /* Connection to watch for unlock */
  void *pUnlockArg;                     /* Argument to xUnlockNotify */
  void (*xUnlockNotify)(void **, int);  /* Unlock notify callback */
  sqlite3 *pNextBlocked;        /* Next in list of all blocked connections */
#endif
................................................................................
#define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */
#define SQLITE_LegacyFileFmt  0x00008000  /* Create new databases in format 1 */
#define SQLITE_FullFSync      0x00010000  /* Use full fsync on the backend */
#define SQLITE_LoadExtension  0x00020000  /* Enable load_extension */

#define SQLITE_RecoveryMode   0x00040000  /* Ignore schema errors */
#define SQLITE_SharedCache    0x00080000  /* Cache sharing is enabled */
#define SQLITE_Vtab           0x00100000  /* There exists a virtual table */
#define SQLITE_CommitBusy     0x00200000  /* In the process of committing */
#define SQLITE_ReverseOrder   0x00400000  /* Reverse unordered SELECTs */

/*
** Possible values for the sqlite.magic field.
** The numbers are obtained at random and have no special meaning, other
** than being distinct from one another.
................................................................................
**       b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
**     );
**
** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
**
** Each REFERENCES clause generates an instance of the following structure
** which is attached to the from-table.  The to-table need not exist when
** the from-table is created.  The existence of the to-table is not checked
** until an attempt is made to insert data into the from-table.
**
** The sqlite.aFKey hash table stores pointers to this structure
** given the name of a to-table.  For each to-table, all foreign keys
** associated with that table are on a linked list using the FKey.pNextTo
** field.
*/
struct FKey {
  Table *pFrom;     /* The table that contains the REFERENCES clause */
  FKey *pNextFrom;  /* Next foreign key in pFrom */
  char *zTo;        /* Name of table that the key points to */
  FKey *pNextTo;    /* Next foreign key that points to zTo */
  int nCol;         /* Number of columns in this key */
  struct sColMap {  /* Mapping of columns in pFrom to columns in zTo */
    int iFrom;         /* Index of column in pFrom */
    char *zCol;        /* Name of column in zTo.  If 0 use PRIMARY KEY */
  } *aCol;          /* One entry for each of nCol column s */
  u8 isDeferred;    /* True if constraint checking is deferred till COMMIT */
  u8 updateConf;    /* How to resolve conflicts that occur on UPDATE */
  u8 deleteConf;    /* How to resolve conflicts that occur on DELETE */
  u8 insertConf;    /* How to resolve conflicts that occur on INSERT */




};

/*
** SQLite supports many different ways to resolve a constraint
** error.  ROLLBACK processing means that a constraint violation
** causes the operation in process to fail and for the current transaction
** to be rolled back.  ABORT processing means the operation in process
................................................................................
** This structure holds a record that has already been disassembled
** into its constituent fields.
*/
struct UnpackedRecord {
  KeyInfo *pKeyInfo;  /* Collation and sort-order information */
  u16 nField;         /* Number of entries in apMem[] */
  u16 flags;          /* Boolean settings.  UNPACKED_... below */

  Mem *aMem;          /* Values */
};

/*
** Allowed values of UnpackedRecord.flags
*/
#define UNPACKED_NEED_FREE     0x0001  /* Memory is from sqlite3Malloc() */
#define UNPACKED_NEED_DESTROY  0x0002  /* apMem[]s should all be destroyed */
#define UNPACKED_IGNORE_ROWID  0x0004  /* Ignore trailing rowid on key1 */
#define UNPACKED_INCRKEY       0x0008  /* Make this key an epsilon larger */
#define UNPACKED_PREFIX_MATCH  0x0010  /* A prefix match is considered OK */


/*
** Each SQL index is represented in memory by an
** instance of the following structure.
**
** The columns of the table that are to be indexed are described
** by the aiColumn[] field of this structure.  For example, suppose
................................................................................
**
** Note if Token.z==0 then Token.dyn and Token.n are undefined and
** may contain random values.  Do not make any assumptions about Token.dyn
** and Token.n when Token.z==0.
*/
struct Token {
  const unsigned char *z; /* Text of the token.  Not NULL-terminated! */
  unsigned dyn  : 1;      /* True for malloced memory, false for static */

  unsigned n    : 31;     /* Number of characters in this token */
};

/*
** An instance of this structure contains information needed to generate
** code for a SELECT that contains aggregate functions.
**
** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a
................................................................................
**
** If the Expr is of type OP_Column, and the table it is selecting from
** is a disk table or the "old.*" pseudo-table, then pTab points to the
** corresponding table definition.
**
** ALLOCATION NOTES:
**
** Expr structures may be stored as part of the in-memory database schema,
** for example as part of trigger, view or table definitions. In this case,
** the amount of memory consumed by complex expressions may be significant.
** For this reason, less than sizeof(Expr) bytes may be allocated for some 
** Expr structs stored as part of the in-memory database schema.
**
** If the EP_Reduced flag is set in Expr.flags, then only EXPR_REDUCEDSIZE
** bytes of space are allocated for the expression structure. This is enough
** space to store all fields up to and including the "Token span;" field.
**
** If the EP_TokenOnly flag is set in Expr.flags, then only EXPR_TOKENONLYSIZE
** bytes of space are allocated for the expression structure. This is enough
** space to store all fields up to and including the "Token token;" field.
*/
struct Expr {
  u8 op;                 /* Operation performed by this node */
  char affinity;         /* The affinity of the column or 0 if not a column */
  VVA_ONLY(u8 vvaFlags;) /* Flags used for VV&A only.  EVVA_* below. */
  u16 flags;             /* Various flags.  EP_* See below */
  Token token;           /* An operand token */
................................................................................
  /* If the EP_TokenOnly flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction. 
  *********************************************************************/

  Token span;            /* Complete text of the expression */

  /* If the EP_SpanOnly flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction. 
  *********************************************************************/

  Expr *pLeft;           /* Left subnode */
  Expr *pRight;          /* Right subnode */
  union {
................................................................................
*/
#define EP_FromJoin   0x0001  /* Originated in ON or USING clause of a join */
#define EP_Agg        0x0002  /* Contains one or more aggregate functions */
#define EP_Resolved   0x0004  /* IDs have been resolved to COLUMNs */
#define EP_Error      0x0008  /* Expression contains one or more errors */
#define EP_Distinct   0x0010  /* Aggregate function with DISTINCT keyword */
#define EP_VarSelect  0x0020  /* pSelect is correlated, not constant */
#define EP_Dequoted   0x0040  /* True if the string has been dequoted */
#define EP_InfixFunc  0x0080  /* True for an infix function: LIKE, GLOB, etc */
#define EP_ExpCollate 0x0100  /* Collating sequence specified explicitly */
#define EP_AnyAff     0x0200  /* Can take a cached column of any affinity */
#define EP_FixedDest  0x0400  /* Result needed in a specific register */
#define EP_IntValue   0x0800  /* Integer value contained in iTable */
#define EP_xIsSelect  0x1000  /* x.pSelect is valid (otherwise x.pList is) */

#define EP_Reduced    0x2000  /* Expr struct is EXPR_REDUCEDSIZE bytes only */
#define EP_TokenOnly  0x4000  /* Expr struct is EXPR_TOKENONLYSIZE bytes only */
#define EP_SpanOnly   0x8000  /* Expr struct is EXPR_SPANONLYSIZE bytes only */

/*
** The following are the meanings of bits in the Expr.vvaFlags field.
** This information is only used when SQLite is compiled with
** SQLITE_DEBUG defined.
*/
#ifndef NDEBUG
................................................................................
#define ExprClearProperty(E,P)   (E)->flags&=~(P)

/*
** Macros to determine the number of bytes required by a normal Expr 
** struct, an Expr struct with the EP_Reduced flag set in Expr.flags 
** and an Expr struct with the EP_TokenOnly flag set.
*/
#define EXPR_FULLSIZE           sizeof(Expr)
#define EXPR_REDUCEDSIZE        offsetof(Expr,iTable)

#define EXPR_TOKENONLYSIZE      offsetof(Expr,span)
#define EXPR_SPANONLYSIZE       offsetof(Expr,pLeft)

/*
** Flags passed to the sqlite3ExprDup() function. See the header comment 
** above sqlite3ExprDup() for details.
*/
#define EXPRDUP_REDUCE         0x0001
#define EXPRDUP_SPAN           0x0002
#define EXPRDUP_DISTINCTSPAN   0x0004

/*
** A list of expressions.  Each expression may optionally have a
** name.  An expr/name combination can be used in several ways, such
** as the list of "expr AS ID" fields following a "SELECT" or in the
** list of "ID = expr" items in an UPDATE.  A list of expressions can
** also be used as the argument to a function, in which case the a.zName
................................................................................
  ** a convenient place since there is one WhereLevel for each FROM clause
  ** element.
  */
  sqlite3_index_info *pIdxInfo;  /* Index info for n-th source table */
};

/*
** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin().

*/
#define WHERE_ORDERBY_NORMAL   0x0000 /* No-op */
#define WHERE_ORDERBY_MIN      0x0001 /* ORDER BY processing for min() func */
#define WHERE_ORDERBY_MAX      0x0002 /* ORDER BY processing for max() func */
#define WHERE_ONEPASS_DESIRED  0x0004 /* Want to do one-pass UPDATE/DELETE */
#define WHERE_FILL_ROWSET      0x0008  /* Save results in a RowSet object */
#define WHERE_OMIT_OPEN        0x0010  /* Table cursor are already open */
#define WHERE_OMIT_CLOSE       0x0020  /* Omit close of table & index cursors */


/*
** The WHERE clause processing routine has two halves.  The
** first part does the start of the WHERE loop and the second
** half does the tail of the WHERE loop.  An instance of
** this structure is returned by the first half and passed
** into the second half to give some continuity.
*/
struct WhereInfo {
  Parse *pParse;       /* Parsing and code generating context */
  u16 wctrlFlags;      /* Flags originally passed to sqlite3WhereBegin() */
  u8 okOnePass;        /* Ok to use one-pass algorithm for UPDATE or DELETE */
  int regRowSet;                 /* Store rowids in this rowset if >=0 */
  SrcList *pTabList;             /* List of tables in the join */
  int iTop;                      /* The very beginning of the WHERE loop */
  int iContinue;                 /* Jump here to continue with next record */
  int iBreak;                    /* Jump here to break out of the loop */
  int nLevel;                    /* Number of nested loop */
  struct WhereClause *pWC;       /* Decomposition of the WHERE clause */
  WhereLevel a[1];               /* Information about each nest loop in WHERE */
................................................................................
  u8 eDest;         /* How to dispose of the results */
  u8 affinity;      /* Affinity used when eDest==SRT_Set */
  int iParm;        /* A parameter used by the eDest disposal method */
  int iMem;         /* Base register where results are written */
  int nMem;         /* Number of registers allocated */
};








/*
** An SQL parser context.  A copy of this structure is passed through
** the parser and down into all the parser action routine in order to
** carry around information that is global to the entire parse.
**
** The structure is divided into two parts.  When the parser and code
** generate call themselves recursively, the first part of the structure
................................................................................
  int nRangeReg;       /* Size of the temporary register block */
  int iRangeReg;       /* First register in temporary register block */
  int nErr;            /* Number of errors seen */
  int nTab;            /* Number of previously allocated VDBE cursors */
  int nMem;            /* Number of memory cells used so far */
  int nSet;            /* Number of sets used so far */
  int ckBase;          /* Base register of data during check constraints */
  int disableColCache; /* True to disable adding to column cache */

  int nColCache;       /* Number of entries in the column cache */
  int iColCache;       /* Next entry of the cache to replace */
  struct yColCache {
    int iTable;           /* Table cursor number */
    int iColumn;          /* Table column number */
    char affChange;       /* True if this register has had an affinity change */


    int iReg;             /* Register holding value of this column */
  } aColCache[10];     /* One for each valid column cache entry */


  u32 writeMask;       /* Start a write transaction on these databases */
  u32 cookieMask;      /* Bitmask of schema verified databases */
  int cookieGoto;      /* Address of OP_Goto to cookie verifier subroutine */
  int cookieValue[SQLITE_MAX_ATTACHED+2];  /* Values of cookies to verify */
#ifndef SQLITE_OMIT_SHARED_CACHE
  int nTableLock;        /* Number of locks in aTableLock */
  TableLock *aTableLock; /* Required table locks for shared-cache mode */
................................................................................
*/
struct AuthContext {
  const char *zAuthContext;   /* Put saved Parse.zAuthContext here */
  Parse *pParse;              /* The Parse structure */
};

/*
** Bitfield flags for P2 value in OP_Insert and OP_Delete
*/
#define OPFLAG_NCHANGE   1    /* Set to update db->nChange */
#define OPFLAG_LASTROWID 2    /* Set to update db->lastRowid */
#define OPFLAG_ISUPDATE  4    /* This OP_Insert is an sql UPDATE */
#define OPFLAG_APPEND    8    /* This is likely to be an append */


/*
 * Each trigger present in the database schema is stored as an instance of
 * struct Trigger. 
 *
 * Pointers to instances of struct Trigger are stored in two ways.
 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the 
................................................................................

/*
** Internal function prototypes
*/
SQLITE_PRIVATE int sqlite3StrICmp(const char *, const char *);
SQLITE_PRIVATE int sqlite3StrNICmp(const char *, const char *, int);
SQLITE_PRIVATE int sqlite3IsNumber(const char*, int*, u8);
SQLITE_PRIVATE int sqlite3Strlen(sqlite3*, const char*);
SQLITE_PRIVATE int sqlite3Strlen30(const char*);

SQLITE_PRIVATE int sqlite3MallocInit(void);
SQLITE_PRIVATE void sqlite3MallocEnd(void);
SQLITE_PRIVATE void *sqlite3Malloc(int);
SQLITE_PRIVATE void *sqlite3MallocZero(int);
SQLITE_PRIVATE void *sqlite3DbMallocZero(sqlite3*, int);
................................................................................
#endif
#if defined(SQLITE_TEST)
SQLITE_PRIVATE   void *sqlite3TestTextToPtr(const char*);
#endif
SQLITE_PRIVATE void sqlite3SetString(char **, sqlite3*, const char*, ...);
SQLITE_PRIVATE void sqlite3ErrorMsg(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ErrorClear(Parse*);
SQLITE_PRIVATE void sqlite3Dequote(char*);
SQLITE_PRIVATE void sqlite3DequoteExpr(Expr*);
SQLITE_PRIVATE int sqlite3KeywordCode(const unsigned char*, int);
SQLITE_PRIVATE int sqlite3RunParser(Parse*, const char*, char **);
SQLITE_PRIVATE void sqlite3FinishCoding(Parse*);
SQLITE_PRIVATE int sqlite3GetTempReg(Parse*);
SQLITE_PRIVATE void sqlite3ReleaseTempReg(Parse*,int);
SQLITE_PRIVATE int sqlite3GetTempRange(Parse*,int);
SQLITE_PRIVATE void sqlite3ReleaseTempRange(Parse*,int,int);
................................................................................
SQLITE_PRIVATE void sqlite3BitvecDestroy(Bitvec*);
SQLITE_PRIVATE u32 sqlite3BitvecSize(Bitvec*);
SQLITE_PRIVATE int sqlite3BitvecBuiltinTest(int,int*);

SQLITE_PRIVATE RowSet *sqlite3RowSetInit(sqlite3*, void*, unsigned int);
SQLITE_PRIVATE void sqlite3RowSetClear(RowSet*);
SQLITE_PRIVATE void sqlite3RowSetInsert(RowSet*, i64);

SQLITE_PRIVATE int sqlite3RowSetNext(RowSet*, i64*);

SQLITE_PRIVATE void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);

#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
SQLITE_PRIVATE   int sqlite3ViewGetColumnNames(Parse*,Table*);
#else
................................................................................
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse*, Table*, int);
SQLITE_PRIVATE void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY)
SQLITE_PRIVATE Expr *sqlite3LimitWhere(Parse *, SrcList *, Expr *, ExprList *, Expr *, Expr *, char *);
#endif
SQLITE_PRIVATE void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
SQLITE_PRIVATE void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
SQLITE_PRIVATE WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, u8, int);
SQLITE_PRIVATE void sqlite3WhereEnd(WhereInfo*);
SQLITE_PRIVATE int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCodeMove(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCodeCopy(Parse*, int, int, int);

SQLITE_PRIVATE void sqlite3ExprClearColumnCache(Parse*, int);
SQLITE_PRIVATE void sqlite3ExprCacheAffinityChange(Parse*, int, int);

SQLITE_PRIVATE void sqlite3ExprWritableRegister(Parse*,int);

SQLITE_PRIVATE void sqlite3ExprHardCopy(Parse*,int,int);
SQLITE_PRIVATE int sqlite3ExprCode(Parse*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCodeTemp(Parse*, Expr*, int*);
SQLITE_PRIVATE int sqlite3ExprCodeTarget(Parse*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCodeAndCache(Parse*, Expr*, int);
SQLITE_PRIVATE void sqlite3ExprCodeConstants(Parse*, Expr*);
SQLITE_PRIVATE int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int);
................................................................................
SQLITE_PRIVATE int sqlite3ExprIsConstantOrFunction(Expr*);
SQLITE_PRIVATE int sqlite3ExprIsInteger(Expr*, int*);
SQLITE_PRIVATE int sqlite3IsRowid(const char*);
SQLITE_PRIVATE void sqlite3GenerateRowDelete(Parse*, Table*, int, int, int);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int,
                                     int*,int,int,int,int);
SQLITE_PRIVATE void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*, int, int, int);
SQLITE_PRIVATE int sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse*, int, int);
SQLITE_PRIVATE Expr *sqlite3ExprDup(sqlite3*,Expr*,int);
SQLITE_PRIVATE void sqlite3TokenCopy(sqlite3*,Token*,const Token*);
SQLITE_PRIVATE ExprList *sqlite3ExprListDup(sqlite3*,ExprList*,int);
SQLITE_PRIVATE SrcList *sqlite3SrcListDup(sqlite3*,SrcList*,int);
SQLITE_PRIVATE IdList *sqlite3IdListDup(sqlite3*,IdList*);
................................................................................
SQLITE_PRIVATE   void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
#else
# define sqlite3TriggersExist(B,C,D,E,F) 0
# define sqlite3DeleteTrigger(A,B)
# define sqlite3DropTriggerPtr(A,B)
# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I,J,K,L) 0

#endif

SQLITE_PRIVATE int sqlite3JoinType(Parse*, Token*, Token*, Token*);
SQLITE_PRIVATE void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
SQLITE_PRIVATE void sqlite3DeferForeignKey(Parse*, int);
#ifndef SQLITE_OMIT_AUTHORIZATION
SQLITE_PRIVATE   void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*);
................................................................................
SQLITE_PRIVATE int sqlite3FixExprList(DbFixer*, ExprList*);
SQLITE_PRIVATE int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
SQLITE_PRIVATE int sqlite3AtoF(const char *z, double*);
SQLITE_PRIVATE int sqlite3GetInt32(const char *, int*);
SQLITE_PRIVATE int sqlite3FitsIn64Bits(const char *, int);
SQLITE_PRIVATE int sqlite3Utf16ByteLen(const void *pData, int nChar);
SQLITE_PRIVATE int sqlite3Utf8CharLen(const char *pData, int nByte);
SQLITE_PRIVATE int sqlite3Utf8Read(const u8*, const u8*, const u8**);

/*
** Routines to read and write variable-length integers.  These used to
** be defined locally, but now we use the varint routines in the util.c
** file.  Code should use the MACRO forms below, as the Varint32 versions
** are coded to assume the single byte case is already handled (which 
** the MACRO form does).
................................................................................
SQLITE_PRIVATE int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *);
SQLITE_PRIVATE FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*);
SQLITE_PRIVATE void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**);
SQLITE_PRIVATE int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *);
SQLITE_PRIVATE int sqlite3Reprepare(Vdbe*);
SQLITE_PRIVATE void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
SQLITE_PRIVATE CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);




/*
** Available fault injectors.  Should be numbered beginning with 0.
*/
#define SQLITE_FAULTINJECTOR_MALLOC     0
#define SQLITE_FAULTINJECTOR_COUNT      1
................................................................................
** This file contains the C functions that implement date and time
** functions for SQLite.  
**
** There is only one exported symbol in this file - the function
** sqlite3RegisterDateTimeFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: date.c,v 1.103 2009/02/04 03:59:25 shane Exp $
**
** SQLite processes all times and dates as Julian Day numbers.  The
** dates and times are stored as the number of days since noon
** in Greenwich on November 24, 4714 B.C. according to the Gregorian
** calendar system. 
**
** 1970-01-01 00:00:00 is JD 2440587.5
................................................................................
** as there is a year and date.
*/
static int parseDateOrTime(
  sqlite3_context *context, 
  const char *zDate, 
  DateTime *p
){

  if( parseYyyyMmDd(zDate,p)==0 ){
    return 0;
  }else if( parseHhMmSs(zDate, p)==0 ){
    return 0;
  }else if( sqlite3StrICmp(zDate,"now")==0){
    setDateTimeToCurrent(context, p);
    return 0;
  }else if( sqlite3IsNumber(zDate, 0, SQLITE_UTF8) ){
    double r;
    getValue(zDate, &r);
    p->iJD = (sqlite3_int64)(r*86400000.0 + 0.5);
    p->validJD = 1;
    return 0;
  }
  return 1;
................................................................................
      /*
      **    unixepoch
      **
      ** Treat the current value of p->iJD as the number of
      ** seconds since 1970.  Convert to a real julian day number.
      */
      if( strcmp(z, "unixepoch")==0 && p->validJD ){
        p->iJD = p->iJD/86400 + 21086676*(i64)10000000;
        clearYMD_HMS_TZ(p);
        rc = 0;
      }
#ifndef SQLITE_OMIT_LOCALTIME
      else if( strcmp(z, "utc")==0 ){
        sqlite3_int64 c1;
        computeJD(p);
................................................................................
          sqlite3_snprintf(20, &z[j],"%.16g",x.iJD/86400000.0);
          j+=sqlite3Strlen30(&z[j]);
          break;
        }
        case 'm':  sqlite3_snprintf(3, &z[j],"%02d",x.M); j+=2; break;
        case 'M':  sqlite3_snprintf(3, &z[j],"%02d",x.m); j+=2; break;
        case 's': {
          sqlite3_snprintf(30,&z[j],"%d",
                           (int)(x.iJD/1000.0 - 210866760000.0));
          j += sqlite3Strlen30(&z[j]);
          break;
        }
        case 'S':  sqlite3_snprintf(3,&z[j],"%02d",(int)x.s); j+=2; break;
        case 'w': {
          z[j++] = (char)(((x.iJD+129600000)/86400000) % 7) + '0';
          break;
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** Memory allocation functions used throughout sqlite.
**
** $Id: malloc.c,v 1.61 2009/03/24 15:08:10 drh Exp $
*/

/*
** This routine runs when the memory allocator sees that the
** total memory allocation is about to exceed the soft heap
** limit.
*/
................................................................................
*/
SQLITE_PRIVATE char *sqlite3DbStrDup(sqlite3 *db, const char *z){
  char *zNew;
  size_t n;
  if( z==0 ){
    return 0;
  }
  n = (db ? sqlite3Strlen(db, z) : sqlite3Strlen30(z))+1;
  assert( (n&0x7fffffff)==n );
  zNew = sqlite3DbMallocRaw(db, (int)n);
  if( zNew ){
    memcpy(zNew, z, n);
  }
  return zNew;
}
................................................................................
/*
** The "printf" code that follows dates from the 1980's.  It is in
** the public domain.  The original comments are included here for
** completeness.  They are very out-of-date but might be useful as
** an historical reference.  Most of the "enhancements" have been backed
** out so that the functionality is now the same as standard printf().
**
** $Id: printf.c,v 1.99 2008/12/10 19:26:24 drh Exp $
**
**************************************************************************
**
** The following modules is an enhanced replacement for the "printf" subroutines
** found in the standard C library.  The following enhancements are
** supported:
**
................................................................................
                          NULL pointers replaced by SQL NULL.  %Q */
#define etTOKEN      12 /* a pointer to a Token structure */
#define etSRCLIST    13 /* a pointer to a SrcList */
#define etPOINTER    14 /* The %p conversion */
#define etSQLESCAPE3 15 /* %w -> Strings with '\"' doubled */
#define etORDINAL    16 /* %r -> 1st, 2nd, 3rd, 4th, etc.  English only */




/*
** An "etByte" is an 8-bit unsigned value.
*/
typedef unsigned char etByte;

/*
................................................................................
  {  'E',  0, 1, etEXP,        14, 0 },
  {  'G',  0, 1, etGENERIC,    14, 0 },
#endif
  {  'i', 10, 1, etRADIX,      0,  0 },
  {  'n',  0, 0, etSIZE,       0,  0 },
  {  '%',  0, 0, etPERCENT,    0,  0 },
  {  'p', 16, 0, etPOINTER,    0,  1 },



  {  'T',  0, 2, etTOKEN,      0,  0 },
  {  'S',  0, 2, etSRCLIST,    0,  0 },
  {  'r', 10, 3, etORDINAL,    0,  0 },
};

/*
** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
................................................................................
      }else{
        flag_longlong = 0;
      }
    }else{
      flag_long = flag_longlong = 0;
    }
    /* Fetch the info entry for the field */
    infop = 0;

    for(idx=0; idx<ArraySize(fmtinfo); idx++){
      if( c==fmtinfo[idx].fmttype ){
        infop = &fmtinfo[idx];
        if( useExtended || (infop->flags & FLAG_INTERN)==0 ){
          xtype = infop->type;
        }else{
          return;
        }
        break;
      }
    }
    zExtra = 0;
    if( infop==0 ){
      return;
    }


    /* Limit the precision to prevent overflowing buf[] during conversion */
    if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){
      precision = etBUFSIZE-40;
    }

................................................................................
        flag_longlong = sizeof(char*)==sizeof(i64);
        flag_long = sizeof(char*)==sizeof(long int);
        /* Fall through into the next case */
      case etORDINAL:
      case etRADIX:
        if( infop->flags & FLAG_SIGNED ){
          i64 v;
          if( flag_longlong )   v = va_arg(ap,i64);


          else if( flag_long )  v = va_arg(ap,long int);

          else                  v = va_arg(ap,int);

          if( v<0 ){
            longvalue = -v;
            prefix = '-';
          }else{
            longvalue = v;
            if( flag_plussign )        prefix = '+';
            else if( flag_blanksign )  prefix = ' ';
            else                       prefix = 0;
          }
        }else{

          if( flag_longlong )   longvalue = va_arg(ap,u64);

          else if( flag_long )  longvalue = va_arg(ap,unsigned long int);

          else                  longvalue = va_arg(ap,unsigned int);

          prefix = 0;
        }
        if( longvalue==0 ) flag_alternateform = 0;
        if( flag_zeropad && precision<width-(prefix!=0) ){
          precision = width-(prefix!=0);
        }
        bufpt = &buf[etBUFSIZE-1];
................................................................................
        if( pItem->zDatabase ){
          sqlite3StrAccumAppend(pAccum, pItem->zDatabase, -1);
          sqlite3StrAccumAppend(pAccum, ".", 1);
        }
        sqlite3StrAccumAppend(pAccum, pItem->zName, -1);
        length = width = 0;
        break;




      }
    }/* End switch over the format type */
    /*
    ** The text of the conversion is pointed to by "bufpt" and is
    ** "length" characters long.  The field width is "width".  Do
    ** the output.
    */
................................................................................
  }/* End for loop over the format string */
} /* End of function */

/*
** Append N bytes of text from z to the StrAccum object.
*/
SQLITE_PRIVATE void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){

  if( p->tooBig | p->mallocFailed ){


    return;
  }
  if( N<0 ){
    N = sqlite3Strlen30(z);
  }
  if( N==0 || z==0 ){
    return;
  }
  if( p->nChar+N >= p->nAlloc ){
    char *zNew;
    if( !p->useMalloc ){
      p->tooBig = 1;
      N = p->nAlloc - p->nChar - 1;
................................................................................
** Print into memory obtained from sqliteMalloc().  Use the internal
** %-conversion extensions.
*/
SQLITE_PRIVATE char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){
  char *z;
  char zBase[SQLITE_PRINT_BUF_SIZE];
  StrAccum acc;

  sqlite3StrAccumInit(&acc, zBase, sizeof(zBase),
                      db ? db->aLimit[SQLITE_LIMIT_LENGTH] : SQLITE_MAX_LENGTH);
  acc.db = db;
  sqlite3VXPrintf(&acc, 1, zFormat, ap);
  z = sqlite3StrAccumFinish(&acc);
  if( acc.mallocFailed && db ){
    db->mallocFailed = 1;
  }
  return z;
}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used to translate between UTF-8, 
** UTF-16, UTF-16BE, and UTF-16LE.
**
** $Id: utf.c,v 1.71 2009/03/31 03:41:57 shane Exp $
**
** Notes on UTF-8:
**
**   Byte-0    Byte-1    Byte-2    Byte-3    Value
**  0xxxxxxx                                 00000000 00000000 0xxxxxxx
**  110yyyyy  10xxxxxx                       00000000 00000yyy yyxxxxxx
**  1110zzzz  10yyyyyy  10xxxxxx             00000000 zzzzyyyy yyxxxxxx
................................................................................
*************************************************************************
** This is the header file for information that is private to the
** VDBE.  This information used to all be at the top of the single
** source code file "vdbe.c".  When that file became too big (over
** 6000 lines long) it was split up into several smaller files and
** this header information was factored out.
**
** $Id: vdbeInt.h,v 1.166 2009/03/18 10:33:02 danielk1977 Exp $
*/
#ifndef _VDBEINT_H_
#define _VDBEINT_H_

/*
** intToKey() and keyToInt() used to transform the rowid.  But with
** the latest versions of the design they are no-ops.
................................................................................
  char *pData;          /* Data for a NEW or OLD pseudo-table */
  i64 iKey;             /* Key for the NEW or OLD pseudo-table row */
  KeyInfo *pKeyInfo;    /* Info about index keys needed by index cursors */
  int nField;           /* Number of fields in the header */
  i64 seqCount;         /* Sequence counter */
  sqlite3_vtab_cursor *pVtabCursor;  /* The cursor for a virtual table */
  const sqlite3_module *pModule;     /* Module for cursor pVtabCursor */





  /* Cached information about the header for the data record that the
  ** cursor is currently pointing to.  Only valid if cacheValid is true.
  ** aRow might point to (ephemeral) data for the current row, or it might
  ** be NULL.
  */
  int cacheStatus;      /* Cache is valid if this matches Vdbe.cacheCtr */
................................................................................
SQLITE_PRIVATE const char *sqlite3OpcodeName(int);
SQLITE_PRIVATE int sqlite3VdbeOpcodeHasProperty(int, int);
SQLITE_PRIVATE int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);
SQLITE_PRIVATE int sqlite3VdbeCloseStatement(Vdbe *, int);
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
SQLITE_PRIVATE int sqlite3VdbeReleaseBuffers(Vdbe *p);
#endif







SQLITE_PRIVATE int sqlite3VdbeMemTranslate(Mem*, u8);
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE   void sqlite3VdbePrintSql(Vdbe*);
SQLITE_PRIVATE   void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf);
#endif
SQLITE_PRIVATE int sqlite3VdbeMemHandleBom(Mem *pMem);
................................................................................
    *zOut++ = (u8)(c&0x00FF);                                       \
  }                                                                 \
}

#define READ_UTF16LE(zIn, c){                                         \
  c = (*zIn++);                                                       \
  c += ((*zIn++)<<8);                                                 \
  if( c>=0xD800 && c<0xE000 ){                                       \
    int c2 = (*zIn++);                                                \
    c2 += ((*zIn++)<<8);                                              \
    c = (c2&0x03FF) + ((c&0x003F)<<10) + (((c&0x03C0)+0x0040)<<10);   \
    if( (c & 0xFFFF0000)==0 ) c = 0xFFFD;                             \
  }                                                                   \
}

#define READ_UTF16BE(zIn, c){                                         \
  c = ((*zIn++)<<8);                                                  \
  c += (*zIn++);                                                      \
  if( c>=0xD800 && c<0xE000 ){                                       \
    int c2 = ((*zIn++)<<8);                                           \
    c2 += (*zIn++);                                                   \
    c = (c2&0x03FF) + ((c&0x003F)<<10) + (((c&0x03C0)+0x0040)<<10);   \
    if( (c & 0xFFFF0000)==0 ) c = 0xFFFD;                             \
  }                                                                   \
}

/*
** Translate a single UTF-8 character.  Return the unicode value.
**
** During translation, assume that the byte that zTerm points
................................................................................
      c = (c<<6) + (0x3f & *(zIn++));                      \
    }                                                      \
    if( c<0x80                                             \
        || (c&0xFFFFF800)==0xD800                          \
        || (c&0xFFFFFFFE)==0xFFFE ){  c = 0xFFFD; }        \
  }
SQLITE_PRIVATE int sqlite3Utf8Read(
  const unsigned char *z,         /* First byte of UTF-8 character */
  const unsigned char *zTerm,     /* Pretend this byte is 0x00 */
  const unsigned char **pzNext    /* Write first byte past UTF-8 char here */
){
  int c;
  READ_UTF8(z, zTerm, c);














  *pzNext = z;
  return c;
}




/*
................................................................................
** The allocation (static, dynamic etc.) and encoding of the Mem may be
** changed by this function.
*/
SQLITE_PRIVATE int sqlite3VdbeMemHandleBom(Mem *pMem){
  int rc = SQLITE_OK;
  u8 bom = 0;


  if( pMem->n<0 || pMem->n>1 ){
    u8 b1 = *(u8 *)pMem->z;
    u8 b2 = *(((u8 *)pMem->z) + 1);
    if( b1==0xFE && b2==0xFF ){
      bom = SQLITE_UTF16BE;
    }
    if( b1==0xFF && b2==0xFE ){
      bom = SQLITE_UTF16LE;
................................................................................
**
** The translation is done in-place (since it is impossible for the
** correct UTF-8 encoding to be longer than a malformed encoding).
*/
SQLITE_PRIVATE int sqlite3Utf8To8(unsigned char *zIn){
  unsigned char *zOut = zIn;
  unsigned char *zStart = zIn;
  unsigned char *zTerm = &zIn[sqlite3Strlen30((char *)zIn)];
  u32 c;

  while( zIn[0] ){
    c = sqlite3Utf8Read(zIn, zTerm, (const u8**)&zIn);
    if( c!=0xfffd ){
      WRITE_UTF8(zOut, c);
    }
  }
  *zOut = 0;
  return (int)(zOut - zStart);
}
................................................................................
  }
  assert( (m.flags & MEM_Term)!=0 || db->mallocFailed );
  assert( (m.flags & MEM_Str)!=0 || db->mallocFailed );
  return (m.flags & MEM_Dyn)!=0 ? m.z : sqlite3DbStrDup(db, m.z);
}

/*
** pZ is a UTF-16 encoded unicode string. If nChar is less than zero,
** return the number of bytes up to (but not including), the first pair
** of consecutive 0x00 bytes in pZ. If nChar is not less than zero,
** then return the number of bytes in the first nChar unicode characters
** in pZ (or up until the first pair of 0x00 bytes, whichever comes first).

*/
SQLITE_PRIVATE int sqlite3Utf16ByteLen(const void *zIn, int nChar){
  unsigned int c = 1;
  char const *z = zIn;
  int n = 0;
  if( SQLITE_UTF16NATIVE==SQLITE_UTF16BE ){
    /* Using an "if (SQLITE_UTF16NATIVE==SQLITE_UTF16BE)" construct here
    ** and in other parts of this file means that at one branch will
    ** not be covered by coverage testing on any single host. But coverage
    ** will be complete if the tests are run on both a little-endian and 
    ** big-endian host. Because both the UTF16NATIVE and SQLITE_UTF16BE
    ** macros are constant at compile time the compiler can determine
    ** which branch will be followed. It is therefore assumed that no runtime
    ** penalty is paid for this "if" statement.
    */
    while( c && ((nChar<0) || n<nChar) ){
      READ_UTF16BE(z, c);
      n++;
    }
  }else{
    while( c && ((nChar<0) || n<nChar) ){
      READ_UTF16LE(z, c);
      n++;
    }
  }
  return (int)(z-(char const *)zIn)-((c==0)?2:0);
}

#if defined(SQLITE_TEST)
/*
** This routine is called from the TCL test function "translate_selftest".
** It checks that the primitives for serializing and deserializing
** characters in each encoding are inverses of each other.
*/
SQLITE_PRIVATE void sqlite3UtfSelfTest(void){
  unsigned int i, t;
  unsigned char zBuf[20];
  unsigned char *z;
  unsigned char *zTerm;
  int n;
  unsigned int c;

  for(i=0; i<0x00110000; i++){
    z = zBuf;
    WRITE_UTF8(z, i);
    n = (int)(z-zBuf);
    assert( n>0 && n<=4 );
    z[0] = 0;
    zTerm = z;
    z = zBuf;
    c = sqlite3Utf8Read(z, zTerm, (const u8**)&z);
    t = i;
    if( i>=0xD800 && i<=0xDFFF ) t = 0xFFFD;
    if( (i&0xFFFFFFFE)==0xFFFE ) t = 0xFFFD;
    assert( c==t );
    assert( (z-zBuf)==n );
  }
  for(i=0; i<0x00110000; i++){
................................................................................
**
*************************************************************************
** Utility functions used throughout sqlite.
**
** This file contains functions for allocating memory, comparing
** strings, and stuff like that.
**
** $Id: util.c,v 1.249 2009/03/01 22:29:20 drh Exp $
*/


/*
** Routine needed to support the testcase() macro.
*/
#ifdef SQLITE_COVERAGE_TEST
SQLITE_PRIVATE void sqlite3Coverage(int x){
  static int dummy = 0;
................................................................................
  assert( ALWAYS_was_false_or_NEVER_was_true );      /* Always fails */
  return ALWAYS_was_false_or_NEVER_was_true++;       /* Not Reached */
}
#endif

/*
** Return true if the floating point value is Not a Number (NaN).



*/
SQLITE_PRIVATE int sqlite3IsNaN(double x){








  /* This NaN test sometimes fails if compiled on GCC with -ffast-math.
  ** On the other hand, the use of -ffast-math comes with the following
  ** warning:
  **
  **      This option [-ffast-math] should never be turned on by any
  **      -O option since it can result in incorrect output for programs
  **      which depend on an exact implementation of IEEE or ISO 
  **      rules/specifications for math functions.
................................................................................
  **      ...
  */
#ifdef __FAST_MATH__
# error SQLite will not work correctly with the -ffast-math option of GCC.
#endif
  volatile double y = x;
  volatile double z = y;





  return y!=z;
}

/*
** Compute a string length that is limited to what can be stored in
** lower 30 bits of a 32-bit signed integer.




*/
SQLITE_PRIVATE int sqlite3Strlen30(const char *z){
  const char *z2 = z;
  while( *z2 ){ z2++; }
  return 0x3fffffff & (int)(z2 - z);
}

/*
** Return the length of a string, except do not allow the string length
** to exceed the SQLITE_LIMIT_LENGTH setting.
*/
SQLITE_PRIVATE int sqlite3Strlen(sqlite3 *db, const char *z){
  const char *z2 = z;
  int len;
  int x;
  while( *z2 ){ z2++; }
  x = (int)(z2 - z);
  len = 0x7fffffff & x;
  if( len!=x || len > db->aLimit[SQLITE_LIMIT_LENGTH] ){
    return db->aLimit[SQLITE_LIMIT_LENGTH];
  }else{
    return len;
  }
}

/*
** Set the most recent error code and error string for the sqlite
** handle "db". The error code is set to "err_code".
**
** If it is not NULL, string zFormat specifies the format of the
** error string in the style of the printf functions: The following
** format characters are allowed:
................................................................................
** Function sqlite3Error() should be used during statement execution
** (sqlite3_step() etc.).
*/
SQLITE_PRIVATE void sqlite3ErrorMsg(Parse *pParse, const char *zFormat, ...){
  va_list ap;
  sqlite3 *db = pParse->db;
  pParse->nErr++;

  sqlite3DbFree(db, pParse->zErrMsg);
  va_start(ap, zFormat);
  pParse->zErrMsg = sqlite3VMPrintf(db, zFormat, ap);
  va_end(ap);
  if( pParse->rc==SQLITE_OK ){
    pParse->rc = SQLITE_ERROR;
  }
................................................................................
}

/*
** Convert an SQL-style quoted string into a normal string by removing
** the quote characters.  The conversion is done in-place.  If the
** input does not begin with a quote character, then this routine
** is a no-op.







**
** 2002-Feb-14: This routine is extended to remove MS-Access style
** brackets from around identifers.  For example:  "[a-b-c]" becomes
** "a-b-c".
*/
SQLITE_PRIVATE void sqlite3Dequote(char *z){
  char quote;
  int i, j;
  if( z==0 ) return;
  quote = z[0];
  switch( quote ){
    case '\'':  break;
    case '"':   break;
    case '`':   break;                /* For MySQL compatibility */
    case '[':   quote = ']';  break;  /* For MS SqlServer compatibility */
    default:    return;
  }
  for(i=1, j=0; z[i]; i++){
    if( z[i]==quote ){
      if( z[i+1]==quote ){
        z[j++] = quote;
        i++;
      }else{
        z[j++] = 0;
        break;
      }
    }else{
      z[j++] = z[i];
    }
  }


}

/* Convenient short-hand */
#define UpperToLower sqlite3UpperToLower

/*
** Some systems have stricmp().  Others have strcasecmp().  Because
................................................................................
  a = (unsigned char *)zLeft;
  b = (unsigned char *)zRight;
  while( N-- > 0 && *a!=0 && UpperToLower[*a]==UpperToLower[*b]){ a++; b++; }
  return N<0 ? 0 : UpperToLower[*a] - UpperToLower[*b];
}

/*
** Return TRUE if z is a pure numeric string.  Return FALSE if the
** string contains any character which is not part of a number. If



** the string is numeric and contains the '.' character, set *realnum
** to TRUE (otherwise FALSE).



**
** An empty string is considered non-numeric.
*/
SQLITE_PRIVATE int sqlite3IsNumber(const char *z, int *realnum, u8 enc){
  int incr = (enc==SQLITE_UTF8?1:2);
  if( enc==SQLITE_UTF16BE ) z++;
  if( *z=='-' || *z=='+' ) z += incr;
  if( !sqlite3Isdigit(*z) ){
    return 0;
  }
  z += incr;
  if( realnum ) *realnum = 0;
  while( sqlite3Isdigit(*z) ){ z += incr; }
  if( *z=='.' ){
    z += incr;
    if( !sqlite3Isdigit(*z) ) return 0;
    while( sqlite3Isdigit(*z) ){ z += incr; }
    if( realnum ) *realnum = 1;
  }
  if( *z=='e' || *z=='E' ){
    z += incr;
    if( *z=='+' || *z=='-' ) z += incr;
    if( !sqlite3Isdigit(*z) ) return 0;
    while( sqlite3Isdigit(*z) ){ z += incr; }
    if( realnum ) *realnum = 1;
  }
  return *z==0;
}

/*
** The string z[] is an ascii representation of a real number.
** Convert this string to a double.
................................................................................
    ** or 9223372036854775808 if negative.  Note that 9223372036854665808
    ** is 2^63. */
    return compare2pow63(zNum)<neg;
  }
}

/*
** The string zNum represents an integer.  There might be some other
** information following the integer too, but that part is ignored.
** If the integer that the prefix of zNum represents will fit in a
** 64-bit signed integer, return TRUE.  Otherwise return FALSE.
**
** This routine returns FALSE for the string -9223372036854775808 even that
** that number will, in theory fit in a 64-bit integer.  Positive
** 9223373036854775808 will not fit in 64 bits.  So it seems safer to return


** false.

*/
SQLITE_PRIVATE int sqlite3FitsIn64Bits(const char *zNum, int negFlag){
  int i, c;
  int neg = 0;
  if( *zNum=='-' ){

    neg = 1;
    zNum++;
  }else if( *zNum=='+' ){
    zNum++;
  }
  if( negFlag ) neg = 1-neg;
  while( *zNum=='0' ){
    zNum++;   /* Skip leading zeros.  Ticket #2454 */
  }
  for(i=0; (c=zNum[i])>='0' && c<='9'; i++){}
  if( i<19 ){
    /* Guaranteed to fit if less than 19 digits */
................................................................................
** A MACRO version, getVarint32, is provided which inlines the 
** single-byte case.  All code should use the MACRO version as 
** this function assumes the single-byte case has already been handled.
*/
SQLITE_PRIVATE u8 sqlite3GetVarint32(const unsigned char *p, u32 *v){
  u32 a,b;



  a = *p;
  /* a: p0 (unmasked) */
#ifndef getVarint32
  if (!(a&0x80))
  {

    *v = a;
    return 1;
  }
#endif


  p++;
  b = *p;
  /* b: p1 (unmasked) */
  if (!(b&0x80))
  {

    a &= 0x7f;
    a = a<<7;
    *v = a | b;
    return 2;
  }


  p++;
  a = a<<14;
  a |= *p;
  /* a: p0<<14 | p2 (unmasked) */
  if (!(a&0x80))
  {

    a &= (0x7f<<14)|(0x7f);
    b &= 0x7f;
    b = b<<7;
    *v = a | b;
    return 3;
  }



























  p++;
  b = b<<14;
  b |= *p;
  /* b: p1<<14 | p3 (unmasked) */
  if (!(b&0x80))
  {

    b &= (0x7f<<14)|(0x7f);
    a &= (0x7f<<14)|(0x7f);
    a = a<<7;
    *v = a | b;
    return 4;
  }

  p++;
  a = a<<14;
  a |= *p;
  /* a: p0<<28 | p2<<14 | p4 (unmasked) */
  if (!(a&0x80))
  {

    a &= (0x1f<<28)|(0x7f<<14)|(0x7f);
    b &= (0x1f<<28)|(0x7f<<14)|(0x7f);
    b = b<<7;
    *v = a | b;
    return 5;
  }

................................................................................

    p -= 4;
    n = sqlite3GetVarint(p, &v64);
    assert( n>5 && n<=9 );
    *v = (u32)v64;
    return n;
  }

}

/*
** Return the number of bytes that will be needed to store the given
** 64-bit integer.
*/
SQLITE_PRIVATE int sqlite3VarintLen(u64 v){
  int i = 0;
  do{
    i++;
    v >>= 7;
  }while( v!=0 && i<9 );
  return i;
}


/*
** Read or write a four-byte big-endian integer value.
*/
................................................................................
** open properly and is not fit for general use but which can be
** used as an argument to sqlite3_errmsg() or sqlite3_close().
*/
SQLITE_PRIVATE int sqlite3SafetyCheckOk(sqlite3 *db){
  u32 magic;
  if( db==0 ) return 0;
  magic = db->magic;
  if( magic!=SQLITE_MAGIC_OPEN &&

      magic!=SQLITE_MAGIC_BUSY ) return 0;




  return 1;

}
SQLITE_PRIVATE int sqlite3SafetyCheckSickOrOk(sqlite3 *db){
  u32 magic;
  if( db==0 ) return 0;
  magic = db->magic;
  if( magic!=SQLITE_MAGIC_SICK &&
      magic!=SQLITE_MAGIC_OPEN &&
      magic!=SQLITE_MAGIC_BUSY ) return 0;
  return 1;
}

................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the implementation of generic hash-tables
** used in SQLite.
**
** $Id: hash.c,v 1.33 2009/01/09 01:12:28 drh Exp $
*/

/* Turn bulk memory into a hash table object by initializing the
** fields of the Hash structure.
**
** "pNew" is a pointer to the hash table that is to be initialized.
** "copyKey" is true if the hash table should make its own private
** copy of keys and false if it should just use the supplied pointer.
*/
SQLITE_PRIVATE void sqlite3HashInit(Hash *pNew, int copyKey){
  assert( pNew!=0 );
  pNew->copyKey = copyKey!=0;
  pNew->first = 0;
  pNew->count = 0;
  pNew->htsize = 0;
  pNew->ht = 0;
}

/* Remove all entries from a hash table.  Reclaim all memory.
................................................................................
  elem = pH->first;
  pH->first = 0;
  sqlite3_free(pH->ht);
  pH->ht = 0;
  pH->htsize = 0;
  while( elem ){
    HashElem *next_elem = elem->next;
    if( pH->copyKey ){
      sqlite3_free(elem->pKey);
    }
    sqlite3_free(elem);
    elem = next_elem;
  }
  pH->count = 0;
}

/*
** Hash and comparison functions when the mode is SQLITE_HASH_STRING
*/
static int strHash(const void *pKey, int nKey){
  const char *z = (const char *)pKey;
  int h = 0;
  if( nKey<=0 ) nKey = sqlite3Strlen30(z);

  while( nKey > 0  ){
    h = (h<<3) ^ h ^ sqlite3UpperToLower[(unsigned char)*z++];
    nKey--;
  }
  return h & 0x7fffffff;
}
static int strCompare(const void *pKey1, int n1, const void *pKey2, int n2){
  if( n1!=n2 ) return 1;
  return sqlite3StrNICmp((const char*)pKey1,(const char*)pKey2,n1);
}


/* Link an element into the hash table

*/
static void insertElement(
  Hash *pH,              /* The complete hash table */
  struct _ht *pEntry,    /* The entry into which pNew is inserted */
  HashElem *pNew         /* The element to be inserted */
){
  HashElem *pHead;       /* First element already in pEntry */



  pHead = pEntry->chain;



  if( pHead ){
    pNew->next = pHead;
    pNew->prev = pHead->prev;
    if( pHead->prev ){ pHead->prev->next = pNew; }
    else             { pH->first = pNew; }
    pHead->prev = pNew;
  }else{
    pNew->next = pH->first;
    if( pH->first ){ pH->first->prev = pNew; }
    pNew->prev = 0;
    pH->first = pNew;
  }
  pEntry->count++;
  pEntry->chain = pNew;
}


/* Resize the hash table so that it cantains "new_size" buckets.
** "new_size" must be a power of 2.  The hash table might fail 
** to resize if sqlite3_malloc() fails.


*/
static void rehash(Hash *pH, int new_size){
  struct _ht *new_ht;            /* The new hash table */
  HashElem *elem, *next_elem;    /* For looping over existing elements */

#ifdef SQLITE_MALLOC_SOFT_LIMIT
  if( new_size*sizeof(struct _ht)>SQLITE_MALLOC_SOFT_LIMIT ){
    new_size = SQLITE_MALLOC_SOFT_LIMIT/sizeof(struct _ht);
  }
  if( new_size==pH->htsize ) return;
#endif

  /* There is a call to sqlite3_malloc() inside rehash(). If there is
  ** already an allocation at pH->ht, then if this malloc() fails it
  ** is benign (since failing to resize a hash table is a performance
  ** hit only, not a fatal error).
  */
  if( pH->htsize>0 ) sqlite3BeginBenignMalloc();
  new_ht = (struct _ht *)sqlite3MallocZero( new_size*sizeof(struct _ht) );
  if( pH->htsize>0 ) sqlite3EndBenignMalloc();

  if( new_ht==0 ) return;
  sqlite3_free(pH->ht);
  pH->ht = new_ht;
  pH->htsize = new_size;

  for(elem=pH->first, pH->first=0; elem; elem = next_elem){
    int h = strHash(elem->pKey, elem->nKey) & (new_size-1);
    next_elem = elem->next;
    insertElement(pH, &new_ht[h], elem);
  }

}

/* This function (for internal use only) locates an element in an
** hash table that matches the given key.  The hash for this key has
** already been computed and is passed as the 4th parameter.
*/
static HashElem *findElementGivenHash(
  const Hash *pH,     /* The pH to be searched */
  const void *pKey,   /* The key we are searching for */
  int nKey,
  int h               /* The hash for this key. */
){
  HashElem *elem;                /* Used to loop thru the element list */
  int count;                     /* Number of elements left to test */

  if( pH->ht ){
    struct _ht *pEntry = &pH->ht[h];
    elem = pEntry->chain;
    count = pEntry->count;




    while( count-- && elem ){
      if( strCompare(elem->pKey,elem->nKey,pKey,nKey)==0 ){ 

        return elem;
      }
      elem = elem->next;
    }
  }
  return 0;
}

/* Remove a single entry from the hash table given a pointer to that
** element and a hash on the element's key.
*/
static void removeElementGivenHash(
  Hash *pH,         /* The pH containing "elem" */
  HashElem* elem,   /* The element to be removed from the pH */
  int h             /* Hash value for the element */
){
  struct _ht *pEntry;
  if( elem->prev ){
    elem->prev->next = elem->next; 
  }else{
    pH->first = elem->next;
  }
  if( elem->next ){
    elem->next->prev = elem->prev;
  }

  pEntry = &pH->ht[h];
  if( pEntry->chain==elem ){
    pEntry->chain = elem->next;
  }
  pEntry->count--;
  if( pEntry->count<=0 ){
    pEntry->chain = 0;
  }
  if( pH->copyKey ){
    sqlite3_free(elem->pKey);
  }
  sqlite3_free( elem );
  pH->count--;
  if( pH->count<=0 ){
    assert( pH->first==0 );
    assert( pH->count==0 );
    sqlite3HashClear(pH);
  }
}

/* Attempt to locate an element of the hash table pH with a key
** that matches pKey,nKey.  Return a pointer to the corresponding 
** HashElem structure for this element if it is found, or NULL
** otherwise.
*/
SQLITE_PRIVATE HashElem *sqlite3HashFindElem(const Hash *pH, const void *pKey, int nKey){
  int h;             /* A hash on key */
  HashElem *elem;    /* The element that matches key */

  if( pH==0 || pH->ht==0 ) return 0;
  h = strHash(pKey,nKey);
  elem = findElementGivenHash(pH,pKey,nKey, h % pH->htsize);
  return elem;
}

/* Attempt to locate an element of the hash table pH with a key
** that matches pKey,nKey.  Return the data for this element if it is
** found, or NULL if there is no match.
*/
SQLITE_PRIVATE void *sqlite3HashFind(const Hash *pH, const void *pKey, int nKey){
  HashElem *elem;    /* The element that matches key */
  elem = sqlite3HashFindElem(pH, pKey, nKey);










  return elem ? elem->data : 0;
}

/* Insert an element into the hash table pH.  The key is pKey,nKey
** and the data is "data".
**
** If no element exists with a matching key, then a new
** element is created.  A copy of the key is made if the copyKey
** flag is set.  NULL is returned.
**
** If another element already exists with the same key, then the
** new data replaces the old data and the old data is returned.
** The key is not copied in this instance.  If a malloc fails, then
** the new data is returned and the hash table is unchanged.
**
** If the "data" parameter to this function is NULL, then the
** element corresponding to "key" is removed from the hash table.
*/
SQLITE_PRIVATE void *sqlite3HashInsert(Hash *pH, const void *pKey, int nKey, void *data){
  int hraw;             /* Raw hash value of the key */
  int h;                /* the hash of the key modulo hash table size */
  HashElem *elem;       /* Used to loop thru the element list */
  HashElem *new_elem;   /* New element added to the pH */

  assert( pH!=0 );
  hraw = strHash(pKey, nKey);

  if( pH->htsize ){
    h = hraw % pH->htsize;



    elem = findElementGivenHash(pH,pKey,nKey,h);
    if( elem ){
      void *old_data = elem->data;
      if( data==0 ){
        removeElementGivenHash(pH,elem,h);
      }else{
        elem->data = data;
        if( !pH->copyKey ){
          elem->pKey = (void *)pKey;
        }
        assert(nKey==elem->nKey);
      }
      return old_data;
    }
  }
  if( data==0 ) return 0;
  new_elem = (HashElem*)sqlite3Malloc( sizeof(HashElem) );
  if( new_elem==0 ) return data;
  if( pH->copyKey && pKey!=0 ){
    new_elem->pKey = sqlite3Malloc( nKey );
    if( new_elem->pKey==0 ){
      sqlite3_free(new_elem);
      return data;
    }
    memcpy((void*)new_elem->pKey, pKey, nKey);
  }else{
    new_elem->pKey = (void*)pKey;
  }
  new_elem->nKey = nKey;

  pH->count++;


  if( pH->htsize==0 ){
    rehash(pH, 128/sizeof(pH->ht[0]));
    if( pH->htsize==0 ){
      pH->count = 0;
      if( pH->copyKey ){
        sqlite3_free(new_elem->pKey);
      }
      sqlite3_free(new_elem);
      return data;
    }
  }
  if( pH->count > pH->htsize ){
    rehash(pH,pH->htsize*2);
  }
  assert( pH->htsize>0 );
  h = hraw % pH->htsize;
  insertElement(pH, &pH->ht[h], new_elem);
  new_elem->data = data;



  return 0;
}

/************** End of hash.c ************************************************/
/************** Begin file opcodes.c *****************************************/
/* Automatically generated.  Do not edit */
/* See the mkopcodec.awk script for details. */
................................................................................
     /*   5 */ "Seek",
     /*   6 */ "Sequence",
     /*   7 */ "Savepoint",
     /*   8 */ "RowKey",
     /*   9 */ "SCopy",
     /*  10 */ "OpenWrite",
     /*  11 */ "If",
     /*  12 */ "VRowid",
     /*  13 */ "CollSeq",
     /*  14 */ "OpenRead",
     /*  15 */ "Expire",
     /*  16 */ "AutoCommit",
     /*  17 */ "Pagecount",
     /*  18 */ "IntegrityCk",
     /*  19 */ "Not",
     /*  20 */ "Sort",
     /*  21 */ "Copy",
     /*  22 */ "Trace",
     /*  23 */ "Function",
     /*  24 */ "IfNeg",
     /*  25 */ "Noop",
     /*  26 */ "Return",
     /*  27 */ "NewRowid",
     /*  28 */ "Variable",
     /*  29 */ "String",
     /*  30 */ "RealAffinity",
     /*  31 */ "VRename",
     /*  32 */ "ParseSchema",
     /*  33 */ "VOpen",
     /*  34 */ "Close",
     /*  35 */ "CreateIndex",
     /*  36 */ "IsUnique",
     /*  37 */ "NotFound",
     /*  38 */ "Int64",
     /*  39 */ "MustBeInt",
     /*  40 */ "Halt",
     /*  41 */ "Rowid",
     /*  42 */ "IdxLT",
     /*  43 */ "AddImm",
     /*  44 */ "Statement",
     /*  45 */ "RowData",
     /*  46 */ "MemMax",
     /*  47 */ "NotExists",
     /*  48 */ "Gosub",
     /*  49 */ "Integer",
     /*  50 */ "Prev",
     /*  51 */ "RowSetRead",
     /*  52 */ "RowSetAdd",
     /*  53 */ "VColumn",
     /*  54 */ "CreateTable",
     /*  55 */ "Last",
     /*  56 */ "SeekLe",
     /*  57 */ "IncrVacuum",
     /*  58 */ "IdxRowid",
     /*  59 */ "ResetCount",
     /*  60 */ "ContextPush",
     /*  61 */ "Yield",
     /*  62 */ "DropTrigger",
     /*  63 */ "DropIndex",
     /*  64 */ "IdxGE",
     /*  65 */ "IdxDelete",
     /*  66 */ "Or",
     /*  67 */ "And",
     /*  68 */ "Vacuum",
     /*  69 */ "IfNot",
     /*  70 */ "DropTable",
     /*  71 */ "IsNull",
     /*  72 */ "NotNull",
     /*  73 */ "Ne",
     /*  74 */ "Eq",
     /*  75 */ "Gt",
     /*  76 */ "Le",
     /*  77 */ "Lt",
     /*  78 */ "Ge",
     /*  79 */ "SeekLt",
     /*  80 */ "BitAnd",
     /*  81 */ "BitOr",
     /*  82 */ "ShiftLeft",
     /*  83 */ "ShiftRight",
     /*  84 */ "Add",
     /*  85 */ "Subtract",
     /*  86 */ "Multiply",
     /*  87 */ "Divide",
     /*  88 */ "Remainder",
     /*  89 */ "Concat",
     /*  90 */ "MakeRecord",
     /*  91 */ "ResultRow",
     /*  92 */ "Delete",
     /*  93 */ "BitNot",
     /*  94 */ "String8",
     /*  95 */ "AggFinal",
     /*  96 */ "Compare",
     /*  97 */ "Goto",
     /*  98 */ "TableLock",
     /*  99 */ "Clear",
     /* 100 */ "VerifyCookie",
     /* 101 */ "AggStep",
     /* 102 */ "SetNumColumns",
     /* 103 */ "Transaction",
     /* 104 */ "VFilter",
     /* 105 */ "VDestroy",
     /* 106 */ "ContextPop",
     /* 107 */ "Next",
     /* 108 */ "Count",
     /* 109 */ "IdxInsert",
     /* 110 */ "SeekGe",
     /* 111 */ "Insert",
     /* 112 */ "Destroy",
     /* 113 */ "ReadCookie",
     /* 114 */ "LoadAnalysis",
     /* 115 */ "Explain",
     /* 116 */ "HaltIfNull",
     /* 117 */ "OpenPseudo",
     /* 118 */ "OpenEphemeral",
     /* 119 */ "Null",
     /* 120 */ "Move",
................................................................................
**   *  Definitions of sqlite3_io_methods objects for all locking
**      methods plus "finder" functions for each locking method.
**   *  sqlite3_vfs method implementations.
**   *  Locking primitives for the proxy uber-locking-method. (MacOSX only)
**   *  Definitions of sqlite3_vfs objects for all locking methods
**      plus implementations of sqlite3_os_init() and sqlite3_os_end().
**
** $Id: os_unix.c,v 1.248 2009/03/30 07:39:35 danielk1977 Exp $
*/
#if SQLITE_OS_UNIX              /* This file is used on unix only */

/*
** There are various methods for file locking used for concurrency
** control:
**
................................................................................
  if( id ){
    unixFile *pFile = (unixFile*)id;
    semUnlock(id, NO_LOCK);
    assert( pFile );
    unixEnterMutex();
    releaseLockInfo(pFile->pLock);
    releaseOpenCnt(pFile->pOpen);
    closeUnixFile(id);
    unixLeaveMutex();

  }
  return SQLITE_OK;
}

#endif /* OS_VXWORKS */
/*
** Named semaphore locking is only available on VxWorks.
................................................................................
  dotlockIoMethods,         /* sqlite3_io_methods object name */
  dotlockClose,             /* xClose method */
  dotlockLock,              /* xLock method */
  dotlockUnlock,            /* xUnlock method */
  dotlockCheckReservedLock  /* xCheckReservedLock method */
)

#if SQLITE_ENABLE_LOCKING_STYLE
IOMETHODS(
  flockIoFinder,            /* Finder function name */
  flockIoMethods,           /* sqlite3_io_methods object name */
  flockClose,               /* xClose method */
  flockLock,                /* xLock method */
  flockUnlock,              /* xUnlock method */
  flockCheckReservedLock    /* xCheckReservedLock method */
................................................................................
  }
}
static const sqlite3_io_methods *(*const autolockIoFinder)(const char*,int)
        = autolockIoFinderImpl;

#endif /* defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE */







































/*
** An abstract type for a pointer to a IO method finder function:
*/
typedef const sqlite3_io_methods *(*finder_type)(const char*,int);


/****************************************************************************
................................................................................
static int unixOpen(
  sqlite3_vfs *pVfs,           /* The VFS for which this is the xOpen method */
  const char *zPath,           /* Pathname of file to be opened */
  sqlite3_file *pFile,         /* The file descriptor to be filled in */
  int flags,                   /* Input flags to control the opening */
  int *pOutFlags               /* Output flags returned to SQLite core */
){
  int fd = 0;                    /* File descriptor returned by open() */
  int dirfd = -1;                /* Directory file descriptor */
  int openFlags = 0;             /* Flags to pass to open() */
  int eType = flags&0xFFFFFF00;  /* Type of file to open */
  int noLock;                    /* True to omit locking primitives */
  int rc = SQLITE_OK;

  int isExclusive  = (flags & SQLITE_OPEN_EXCLUSIVE);
................................................................................

#ifndef NDEBUG
  if( (flags & SQLITE_OPEN_MAIN_DB)!=0 ){
    ((unixFile*)pFile)->isLockable = 1;
  }
#endif

  assert(fd!=0);
  if( isOpenDirectory ){
    rc = openDirectory(zPath, &dirfd);
    if( rc!=SQLITE_OK ){
      close(fd); /* silently leak if fail, already in error */
      return rc;
    }
  }
................................................................................
  ** All default VFSes for unix are contained in the following array.
  **
  ** Note that the sqlite3_vfs.pNext field of the VFS object is modified
  ** by the SQLite core when the VFS is registered.  So the following
  ** array cannot be const.
  */
  static sqlite3_vfs aVfs[] = {
#if SQLITE_ENABLE_LOCKING_STYLE && defined(__APPLE__)
    UNIXVFS("unix",          autolockIoFinder ),
#else
    UNIXVFS("unix",          posixIoFinder ),
#endif
    UNIXVFS("unix-none",     nolockIoFinder ),
    UNIXVFS("unix-dotfile",  dotlockIoFinder ),
#if OS_VXWORKS
    UNIXVFS("unix-namedsem", semIoFinder ),
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
    UNIXVFS("unix-posix",    posixIoFinder ),

    UNIXVFS("unix-flock",    flockIoFinder ),

#endif
#if SQLITE_ENABLE_LOCKING_STYLE && defined(__APPLE__)
    UNIXVFS("unix-afp",      afpIoFinder ),
    UNIXVFS("unix-proxy",    proxyIoFinder ),
#endif
  };
  unsigned int i;          /* Loop counter */
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains code that is specific to windows.
**
** $Id: os_win.c,v 1.153 2009/03/31 03:41:57 shane Exp $
*/
#if SQLITE_OS_WIN               /* This file is used for windows only */


/*
** A Note About Memory Allocation:
**
................................................................................
  }

  if( flags & SQLITE_OPEN_READWRITE ){
    dwDesiredAccess = GENERIC_READ | GENERIC_WRITE;
  }else{
    dwDesiredAccess = GENERIC_READ;
  }









  if( flags & SQLITE_OPEN_CREATE ){

    dwCreationDisposition = OPEN_ALWAYS;
  }else{

    dwCreationDisposition = OPEN_EXISTING;
  }
  if( flags & SQLITE_OPEN_MAIN_DB ){
    dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
  }else{
    dwShareMode = 0;
  }
  if( flags & SQLITE_OPEN_DELETEONCLOSE ){
#if SQLITE_OS_WINCE
    dwFlagsAndAttributes = FILE_ATTRIBUTE_HIDDEN;
    isTemp = 1;
#else
    dwFlagsAndAttributes = FILE_ATTRIBUTE_TEMPORARY
                               | FILE_ATTRIBUTE_HIDDEN
................................................................................
static int getSectorSize(
    sqlite3_vfs *pVfs,
    const char *zRelative     /* UTF-8 file name */
){
  DWORD bytesPerSector = SQLITE_DEFAULT_SECTOR_SIZE;
  char zFullpath[MAX_PATH+1];
  int rc;
  DWORD dwRet = 0;

  /*
  ** We need to get the full path name of the file
  ** to get the drive letter to look up the sector
  ** size.
  */
  rc = winFullPathname(pVfs, zRelative, MAX_PATH, zFullpath);
  if( rc == SQLITE_OK )
  {
    void *zConverted = convertUtf8Filename(zFullpath);
    if( zConverted ){
      if( isNT() ){
        int i;
        /* trim path to just drive reference */
        WCHAR *p = zConverted;
        for(i=0;i<MAX_PATH;i++){

          if( p[i] == '\\' ){
            i++;
            p[i] = '\0';
            break;
          }
        }
        dwRet = GetDiskFreeSpaceW((WCHAR*)zConverted,
                                  NULL,

                                  &bytesPerSector,
                                  NULL,

                                  NULL);
#if SQLITE_OS_WINCE==0
      }else{
        int i;
        /* trim path to just drive reference */
        CHAR *p = (CHAR *)zConverted;
        for(i=0;i<MAX_PATH;i++){

          if( p[i] == '\\' ){
            i++;
            p[i] = '\0';
            break;
          }
        }
        dwRet = GetDiskFreeSpaceA((CHAR*)zConverted,
                                  NULL,

                                  &bytesPerSector,
                                  NULL,

                                  NULL);
#endif
      }
      free(zConverted);
    }
    if( !dwRet ){
      bytesPerSector = SQLITE_DEFAULT_SECTOR_SIZE;
    }
................................................................................
** Clear operations are exceedingly rare.  There are usually between
** 5 and 500 set operations per Bitvec object, though the number of sets can
** sometimes grow into tens of thousands or larger.  The size of the
** Bitvec object is the number of pages in the database file at the
** start of a transaction, and is thus usually less than a few thousand,
** but can be as large as 2 billion for a really big database.
**
** @(#) $Id: bitvec.c,v 1.13 2009/01/20 17:06:27 danielk1977 Exp $
*/

/* Size of the Bitvec structure in bytes. */
#define BITVEC_SZ        512

/* Round the union size down to the nearest pointer boundary, since that's how 
** it will be aligned within the Bitvec struct. */
................................................................................
** values between 1 and iDivisor.  apSub[1] holds values between
** iDivisor+1 and 2*iDivisor.  apSub[N] holds values between
** N*iDivisor+1 and (N+1)*iDivisor.  Each subbitmap is normalized
** to hold deal with values between 1 and iDivisor.
*/
struct Bitvec {
  u32 iSize;      /* Maximum bit index.  Max iSize is 4,294,967,296. */
  u32 nSet;       /* Number of bits that are set - only valid for aHash element */
                  /* Max nSet is BITVEC_NINT.  For BITVEC_SZ of 512, this would be 125. */

  u32 iDivisor;   /* Number of bits handled by each apSub[] entry. */
                  /* Should >=0 for apSub element. */
                  /* Max iDivisor is max(u32) / BITVEC_NPTR + 1.  */
                  /* For a BITVEC_SZ of 512, this would be 34,359,739. */
  union {
    BITVEC_TELEM aBitmap[BITVEC_NELEM];    /* Bitmap representation */
    u32 aHash[BITVEC_NINT];      /* Hash table representation */
................................................................................

  /* Test to make sure the linear array exactly matches the
  ** Bitvec object.  Start with the assumption that they do
  ** match (rc==0).  Change rc to non-zero if a discrepancy
  ** is found.
  */
  rc = sqlite3BitvecTest(0,0) + sqlite3BitvecTest(pBitvec, sz+1)
          + sqlite3BitvecTest(pBitvec, 0);

  for(i=1; i<=sz; i++){
    if(  (TESTBIT(pV,i))!=sqlite3BitvecTest(pBitvec,i) ){
      rc = i;
      break;
    }
  }

................................................................................
**
** This file implements the default page cache implementation (the
** sqlite3_pcache interface). It also contains part of the implementation
** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features.
** If the default page cache implementation is overriden, then neither of
** these two features are available.
**
** @(#) $Id: pcache1.c,v 1.10 2009/03/23 04:33:33 danielk1977 Exp $
*/


typedef struct PCache1 PCache1;
typedef struct PgHdr1 PgHdr1;
typedef struct PgFreeslot PgFreeslot;

................................................................................

  if( pCache->nPage>=pCache->nHash && pcache1ResizeHash(pCache) ){
    goto fetch_out;
  }

  /* Step 4. Try to recycle a page buffer if appropriate. */
  if( pCache->bPurgeable && pcache1.pLruTail && (
      pCache->nPage>=pCache->nMax-1 || pcache1.nCurrentPage>=pcache1.nMaxPage
  )){
    pPage = pcache1.pLruTail;
    pcache1RemoveFromHash(pPage);
    pcache1PinPage(pPage);
    if( pPage->pCache->szPage!=pCache->szPage ){
      pcache1FreePage(pPage);
      pPage = 0;
................................................................................
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This module implements an object we call a "Row Set".
**
** The RowSet object is a bag of rowids.  Rowids
** are inserted into the bag in an arbitrary order.  Then they are
** pulled from the bag in sorted order.  Rowids only appear in the
** bag once.  If the same rowid is inserted multiple times, the
** second and subsequent inserts make no difference on the output.
**

** This implementation accumulates rowids in a linked list.  For
** output, it first sorts the linked list (removing duplicates during
** the sort) then returns elements one by one by walking the list.
**

** Big chunks of rowid/next-ptr pairs are allocated at a time, to
** reduce the malloc overhead.




**































** $Id: rowset.c,v 1.3 2009/01/13 20:14:16 drh Exp $
*/


/*





** The number of rowset entries per allocation chunk.
*/
#define ROWSET_ENTRY_PER_CHUNK  63


/*
** Each entry in a RowSet is an instance of the following
** structure:
*/
struct RowSetEntry {            
  i64 v;                        /* ROWID value for this entry */
  struct RowSetEntry *pNext;    /* Next entry on a list of all entries */

};

/*
** Index entries are allocated in large chunks (instances of the
** following structure) to reduce memory allocation overhead.  The
** chunks are kept on a linked list so that they can be deallocated
** when the RowSet is destroyed.
*/
struct RowSetChunk {
  struct RowSetChunk *pNext;             /* Next chunk on list of them all */
  struct RowSetEntry aEntry[ROWSET_ENTRY_PER_CHUNK]; /* Allocated entries */
};

/*
** A RowSet in an instance of the following structure.
**
** A typedef of this structure if found in sqliteInt.h.
*/
struct RowSet {
  struct RowSetChunk *pChunk;    /* List of all chunk allocations */
  sqlite3 *db;                   /* The database connection */
  struct RowSetEntry *pEntry;    /* List of entries in the rowset */
  struct RowSetEntry *pLast;     /* Last entry on the pEntry list */
  struct RowSetEntry *pFresh;    /* Source of new entry objects */

  u16 nFresh;                    /* Number of objects on pFresh */
  u8 isSorted;                   /* True if content is sorted */

};

/*
** Turn bulk memory into a RowSet object.  N bytes of memory
** are available at pSpace.  The db pointer is used as a memory context
** for any subsequent allocations that need to occur.
** Return a pointer to the new RowSet object.
................................................................................
  RowSet *p;
  assert( N >= sizeof(*p) );
  p = pSpace;
  p->pChunk = 0;
  p->db = db;
  p->pEntry = 0;
  p->pLast = 0;

  p->pFresh = (struct RowSetEntry*)&p[1];
  p->nFresh = (u16)((N - sizeof(*p))/sizeof(struct RowSetEntry));
  p->isSorted = 1;

  return p;
}

/*
** Deallocate all chunks from a RowSet.


*/
SQLITE_PRIVATE void sqlite3RowSetClear(RowSet *p){
  struct RowSetChunk *pChunk, *pNextChunk;
  for(pChunk=p->pChunk; pChunk; pChunk = pNextChunk){
    pNextChunk = pChunk->pNext;
    sqlite3DbFree(p->db, pChunk);
  }
  p->pChunk = 0;
  p->nFresh = 0;
  p->pEntry = 0;
  p->pLast = 0;

  p->isSorted = 1;
}

/*
** Insert a new value into a RowSet.
**
** The mallocFailed flag of the database connection is set if a
** memory allocation fails.
*/
SQLITE_PRIVATE void sqlite3RowSetInsert(RowSet *p, i64 rowid){
  struct RowSetEntry *pEntry;
  struct RowSetEntry *pLast;
  if( p==0 ) return;  /* Must have been a malloc failure */
  if( p->nFresh==0 ){
    struct RowSetChunk *pNew;
    pNew = sqlite3DbMallocRaw(p->db, sizeof(*pNew));
    if( pNew==0 ){
      return;
    }
    pNew->pNext = p->pChunk;
    p->pChunk = pNew;
    p->pFresh = pNew->aEntry;
    p->nFresh = ROWSET_ENTRY_PER_CHUNK;
  }
  pEntry = p->pFresh++;
  p->nFresh--;
  pEntry->v = rowid;
  pEntry->pNext = 0;
  pLast = p->pLast;
  if( pLast ){
    if( p->isSorted && rowid<=pLast->v ){
      p->isSorted = 0;
    }
    pLast->pNext = pEntry;
  }else{
    assert( p->pEntry==0 );
    p->pEntry = pEntry;
  }
  p->pLast = pEntry;
}

/*
** Merge two lists of RowSet entries.  Remove duplicates.
**
** The input lists are assumed to be in sorted order.

*/
static struct RowSetEntry *boolidxMerge(
  struct RowSetEntry *pA,    /* First sorted list to be merged */
  struct RowSetEntry *pB     /* Second sorted list to be merged */
){
  struct RowSetEntry head;
  struct RowSetEntry *pTail;

  pTail = &head;
  while( pA && pB ){
    assert( pA->pNext==0 || pA->v<=pA->pNext->v );
    assert( pB->pNext==0 || pB->v<=pB->pNext->v );
    if( pA->v<pB->v ){
      pTail->pNext = pA;
      pA = pA->pNext;
      pTail = pTail->pNext;
    }else if( pB->v<pA->v ){
      pTail->pNext = pB;
      pB = pB->pNext;
      pTail = pTail->pNext;
    }else{
      pA = pA->pNext;
    }
  }
  if( pA ){
    assert( pA->pNext==0 || pA->v<=pA->pNext->v );
    pTail->pNext = pA;
  }else{
    assert( pB==0 || pB->pNext==0 || pB->v<=pB->pNext->v );
    pTail->pNext = pB;
  }
  return head.pNext;
}

/*
** Sort all elements of the RowSet into ascending order.
*/ 
static void sqlite3RowSetSort(RowSet *p){
  unsigned int i;
  struct RowSetEntry *pEntry;
  struct RowSetEntry *aBucket[40];

  assert( p->isSorted==0 );
  memset(aBucket, 0, sizeof(aBucket));
  while( p->pEntry ){
    pEntry = p->pEntry;
    p->pEntry = pEntry->pNext;
    pEntry->pNext = 0;
    for(i=0; aBucket[i]; i++){
      pEntry = boolidxMerge(aBucket[i],pEntry);
      aBucket[i] = 0;
    }
    aBucket[i] = pEntry;
  }
  pEntry = 0;
  for(i=0; i<sizeof(aBucket)/sizeof(aBucket[0]); i++){
    pEntry = boolidxMerge(pEntry,aBucket[i]);
  }
  p->pEntry = pEntry;
  p->pLast = 0;
  p->isSorted = 1;
}


/*










































































































** Extract the next (smallest) element from the RowSet.
** Write the element into *pRowid.  Return 1 on success.  Return
** 0 if the RowSet is already empty.



*/
SQLITE_PRIVATE int sqlite3RowSetNext(RowSet *p, i64 *pRowid){
  if( !p->isSorted ){
    sqlite3RowSetSort(p);
  }

  if( p->pEntry ){
    *pRowid = p->pEntry->v;
    p->pEntry = p->pEntry->pNext;
    if( p->pEntry==0 ){
      sqlite3RowSetClear(p);
    }
    return 1;
  }else{
    return 0;
  }
}





























/************** End of rowset.c **********************************************/
/************** Begin file pager.c *******************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.576 2009/03/31 02:54:40 drh Exp $
*/
#ifndef SQLITE_OMIT_DISKIO

/*
** Macros for troubleshooting.  Normally turned off
*/
#if 0
................................................................................
**   This variable is set and cleared by sqlite3PagerWrite().
**
** needSync
**
**   TODO: It might be easier to set this variable in writeJournalHdr()
**   and writeMasterJournal() only. Change its meaning to "unsynced data
**   has been written to the journal".






*/
struct Pager {
  sqlite3_vfs *pVfs;          /* OS functions to use for IO */
  u8 exclusiveMode;           /* Boolean. True if locking_mode==EXCLUSIVE */
  u8 journalMode;             /* On of the PAGER_JOURNALMODE_* values */
  u8 useJournal;              /* Use a rollback journal on this file */
  u8 noReadlock;              /* Do not bother to obtain readlocks */
................................................................................
  u8 dbModified;              /* True if there are any changes to the Db */
  u8 needSync;                /* True if an fsync() is needed on the journal */
  u8 journalStarted;          /* True if header of journal is synced */
  u8 changeCountDone;         /* Set after incrementing the change-counter */
  u8 setMaster;               /* True if a m-j name has been written to jrnl */
  u8 doNotSync;               /* Boolean. While true, do not spill the cache */
  u8 dbSizeValid;             /* Set when dbSize is correct */

  Pgno dbSize;                /* Number of pages in the database */
  Pgno dbOrigSize;            /* dbSize before the current transaction */
  Pgno dbFileSize;            /* Number of pages in the database file */
  int errCode;                /* One of several kinds of errors */
  int nRec;                   /* Pages journalled since last j-header written */
  u32 cksumInit;              /* Quasi-random value added to every checksum */
  u32 nSubRec;                /* Number of records written to sub-journal */
................................................................................
**
** TODO: Why can we not reset the pager while in error state?
*/
static void pager_reset(Pager *pPager){
  if( SQLITE_OK==pPager->errCode ){
    sqlite3BackupRestart(pPager->pBackup);
    sqlite3PcacheClear(pPager->pPCache);

  }
}

/*
** Free all structures in the Pager.aSavepoint[] array and set both
** Pager.aSavepoint and Pager.nSavepoint to zero. Close the sub-journal
** if it is open and the pager is not in exclusive mode.
*/
static void releaseAllSavepoints(Pager *pPager){
  int ii;               /* Iterator for looping through Pager.aSavepoint */
  for(ii=0; ii<pPager->nSavepoint; ii++){
    sqlite3BitvecDestroy(pPager->aSavepoint[ii].pInSavepoint);
  }
  if( !pPager->exclusiveMode ){
    sqlite3OsClose(pPager->sjfd);
  }
  sqlite3_free(pPager->aSavepoint);
  pPager->aSavepoint = 0;
  pPager->nSavepoint = 0;
  pPager->nSubRec = 0;
}
................................................................................
    if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ){
      int isMemoryJournal = sqlite3IsMemJournal(pPager->jfd);
      sqlite3OsClose(pPager->jfd);
      if( !isMemoryJournal ){
        rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
      }
    }else if( pPager->journalMode==PAGER_JOURNALMODE_TRUNCATE ){



      rc = sqlite3OsTruncate(pPager->jfd, 0);

      pPager->journalOff = 0;
      pPager->journalStarted = 0;
    }else if( pPager->exclusiveMode 
     || pPager->journalMode==PAGER_JOURNALMODE_PERSIST
    ){
      rc = zeroJournalHdr(pPager, hasMaster);
      pager_error(pPager, rc);
................................................................................
      rc = pager_playback_one_page(pPager,1,isUnsync,&pPager->journalOff,0,0);
      if( rc!=SQLITE_OK ){
        if( rc==SQLITE_DONE ){
          rc = SQLITE_OK;
          pPager->journalOff = szJ;
          break;
        }else{
          /* If we are unable to rollback, then the database is probably
          ** going to end up being corrupt.  It is corrupt to us, anyhow.

          ** Perhaps the next process to come along can fix it....
          */
          rc = SQLITE_CORRUPT_BKPT;
          goto end_playback;
        }
      }
    }
  }
  /*NOTREACHED*/
  assert( 0 );
................................................................................
  ** is the maximum space required for an in-memory journal file handle 
  ** and a regular journal file-handle. Note that a "regular journal-handle"
  ** may be a wrapper capable of caching the first portion of the journal
  ** file in memory to implement the atomic-write optimization (see 
  ** source file journal.c).
  */
  if( sqlite3JournalSize(pVfs)>sqlite3MemJournalSize() ){
    journalFileSize = sqlite3JournalSize(pVfs);
  }else{
    journalFileSize = sqlite3MemJournalSize();
  }

  /* Set the output variable to NULL in case an error occurs. */
  *ppPager = 0;

  /* Compute and store the full pathname in an allocated buffer pointed
  ** to by zPathname, length nPathname. Or, if this is a temporary file,
................................................................................
  **     Database file handle            (pVfs->szOsFile bytes)
  **     Sub-journal file handle         (journalFileSize bytes)
  **     Main journal file handle        (journalFileSize bytes)
  **     Database file name              (nPathname+1 bytes)
  **     Journal file name               (nPathname+8+1 bytes)
  */
  pPtr = (u8 *)sqlite3MallocZero(
    sizeof(*pPager) +           /* Pager structure */
    pcacheSize      +           /* PCache object */
    pVfs->szOsFile  +           /* The main db file */
    journalFileSize * 2 +       /* The two journal files */ 
    nPathname + 1 +             /* zFilename */
    nPathname + 8 + 1           /* zJournal */
  );

  if( !pPtr ){
    sqlite3_free(zPathname);
    return SQLITE_NOMEM;
  }
  pPager =              (Pager*)(pPtr);
  pPager->pPCache =    (PCache*)(pPtr += sizeof(*pPager));
  pPager->fd =   (sqlite3_file*)(pPtr += pcacheSize);
  pPager->sjfd = (sqlite3_file*)(pPtr += pVfs->szOsFile);
  pPager->jfd =  (sqlite3_file*)(pPtr += journalFileSize);
  pPager->zFilename =    (char*)(pPtr += journalFileSize);


  /* Fill in the Pager.zFilename and Pager.zJournal buffers, if required. */
  if( zPathname ){
    pPager->zJournal =   (char*)(pPtr += nPathname + 1);
    memcpy(pPager->zFilename, zPathname, nPathname);
    memcpy(pPager->zJournal, zPathname, nPathname);
    memcpy(&pPager->zJournal[nPathname], "-journal", 8);
................................................................................
  }
  return rc;
}

/*
** If the reference count has reached zero, rollback any active
** transaction and unlock the pager.




*/ 
static void pagerUnlockIfUnused(Pager *pPager){
  if( sqlite3PcacheRefCount(pPager->pPCache)==0 ){


    pagerUnlockAndRollback(pPager);
  }
}

/*
** Drop a page from the cache using sqlite3PcacheDrop().
**
................................................................................
** SQLITE_OK is returned if everything goes according to plan. 
** An SQLITE_IOERR_XXX error code is returned if a call to 
** sqlite3OsOpen() fails.
*/
static int openSubJournal(Pager *pPager){
  int rc = SQLITE_OK;
  if( isOpen(pPager->jfd) && !isOpen(pPager->sjfd) ){
    if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ){
      sqlite3MemJournalOpen(pPager->sjfd);
    }else{
      rc = pagerOpentemp(pPager, pPager->sjfd, SQLITE_OPEN_SUBJOURNAL);
    }
  }
  return rc;
}
................................................................................
** If this is not a temporary or in-memory file and, the journal file is 
** opened if it has not been already. For a temporary file, the opening 
** of the journal file is deferred until there is an actual need to 
** write to the journal. TODO: Why handle temporary files differently?
**
** If the journal file is opened (or if it is already open), then a
** journal-header is written to the start of it.








*/
SQLITE_PRIVATE int sqlite3PagerBegin(Pager *pPager, int exFlag){
  int rc = SQLITE_OK;
  assert( pPager->state!=PAGER_UNLOCK );

  if( pPager->state==PAGER_SHARED ){
    assert( pPager->pInJournal==0 );
    assert( !MEMDB && !pPager->tempFile );

    /* Obtain a RESERVED lock on the database file. If the exFlag parameter
    ** is true, then immediately upgrade this to an EXCLUSIVE lock. The
    ** busy-handler callback can be used when upgrading to the EXCLUSIVE
................................................................................
    ** written to the transaction journal or the ckeckpoint journal
    ** or both.
    **
    ** First check to see that the transaction journal exists and
    ** create it if it does not.
    */
    assert( pPager->state!=PAGER_UNLOCK );
    rc = sqlite3PagerBegin(pPager, 0);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    assert( pPager->state>=PAGER_RESERVED );
    if( !isOpen(pPager->jfd) && pPager->useJournal
          && pPager->journalMode!=PAGER_JOURNALMODE_OFF ){
      rc = pager_open_journal(pPager);
................................................................................
  ** for the page moved there.
  */
  pPg->flags &= ~PGHDR_NEED_SYNC;
  pPgOld = pager_lookup(pPager, pgno);
  assert( !pPgOld || pPgOld->nRef==1 );
  if( pPgOld ){
    pPg->flags |= (pPgOld->flags&PGHDR_NEED_SYNC);

  }

  origPgno = pPg->pgno;
  sqlite3PcacheMove(pPg, pgno);
  if( pPgOld ){
    sqlite3PcacheDrop(pPgOld);
  }

  sqlite3PcacheMakeDirty(pPg);
  pPager->dbModified = 1;

  if( needSyncPgno ){
    /* If needSyncPgno is non-zero, then the journal file needs to be 
    ** sync()ed before any data is written to database file page needSyncPgno.
    ** Currently, no such page exists in the page-cache and the 
................................................................................
**    PAGER_JOURNALMODE_QUERY
**    PAGER_JOURNALMODE_DELETE
**    PAGER_JOURNALMODE_TRUNCATE
**    PAGER_JOURNALMODE_PERSIST
**    PAGER_JOURNALMODE_OFF
**    PAGER_JOURNALMODE_MEMORY
**
** If the parameter is not _QUERY, then the journal-mode is set to the
** value specified.

**





** The returned indicate the current (possibly updated) journal-mode.
*/
SQLITE_PRIVATE int sqlite3PagerJournalMode(Pager *pPager, int eMode){
  if( !MEMDB ){
    assert( eMode==PAGER_JOURNALMODE_QUERY
              || eMode==PAGER_JOURNALMODE_DELETE
              || eMode==PAGER_JOURNALMODE_TRUNCATE
              || eMode==PAGER_JOURNALMODE_PERSIST
              || eMode==PAGER_JOURNALMODE_OFF 
              || eMode==PAGER_JOURNALMODE_MEMORY );
    assert( PAGER_JOURNALMODE_QUERY<0 );
    if( eMode>=0 ){
      pPager->journalMode = (u8)eMode;
    }else{

      assert( eMode==PAGER_JOURNALMODE_QUERY );





    }

  }
  return (int)pPager->journalMode;
}

/*
** Get/set the size-limit used for persistent journal files.



*/
SQLITE_PRIVATE i64 sqlite3PagerJournalSizeLimit(Pager *pPager, i64 iLimit){
  if( iLimit>=-1 ){
    pPager->journalSizeLimit = iLimit;
  }
  return pPager->journalSizeLimit;
}
................................................................................
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** $Id: btmutex.c,v 1.13 2009/03/05 04:20:32 shane Exp $
**
** This file contains code used to implement mutexes on Btree objects.
** This code really belongs in btree.c.  But btree.c is getting too
** big and we want to break it down some.  This packaged seemed like
** a good breakout.
*/
/************** Include btreeInt.h in the middle of btmutex.c ****************/
................................................................................
SQLITE_PRIVATE int sqlite3BtreeRestoreCursorPosition(BtCursor *pCur);
SQLITE_PRIVATE void sqlite3BtreeGetTempCursor(BtCursor *pCur, BtCursor *pTempCur);
SQLITE_PRIVATE void sqlite3BtreeReleaseTempCursor(BtCursor *pCur);
SQLITE_PRIVATE void sqlite3BtreeMoveToParent(BtCursor *pCur);

/************** End of btreeInt.h ********************************************/
/************** Continuing where we left off in btmutex.c ********************/
#if SQLITE_THREADSAFE && !defined(SQLITE_OMIT_SHARED_CACHE)































/*
** Enter a mutex on the given BTree object.
**
** If the object is not sharable, then no mutex is ever required
** and this routine is a no-op.  The underlying mutex is non-recursive.
** But we keep a reference count in Btree.wantToLock so the behavior
................................................................................
  /* Check for locking consistency */
  assert( !p->locked || p->wantToLock>0 );
  assert( p->sharable || p->wantToLock==0 );

  /* We should already hold a lock on the database connection */
  assert( sqlite3_mutex_held(p->db->mutex) );





  if( !p->sharable ) return;
  p->wantToLock++;
  if( p->locked ) return;

  /* In most cases, we should be able to acquire the lock we
  ** want without having to go throught the ascending lock
  ** procedure that follows.  Just be sure not to block.
  */
  if( sqlite3_mutex_try(p->pBt->mutex)==SQLITE_OK ){

    p->locked = 1;
    return;
  }

  /* To avoid deadlock, first release all locks with a larger
  ** BtShared address.  Then acquire our lock.  Then reacquire
  ** the other BtShared locks that we used to hold in ascending
................................................................................
  ** order.
  */
  for(pLater=p->pNext; pLater; pLater=pLater->pNext){
    assert( pLater->sharable );
    assert( pLater->pNext==0 || pLater->pNext->pBt>pLater->pBt );
    assert( !pLater->locked || pLater->wantToLock>0 );
    if( pLater->locked ){
      sqlite3_mutex_leave(pLater->pBt->mutex);
      pLater->locked = 0;
    }
  }
  sqlite3_mutex_enter(p->pBt->mutex);
  p->locked = 1;

  for(pLater=p->pNext; pLater; pLater=pLater->pNext){
    if( pLater->wantToLock ){
      sqlite3_mutex_enter(pLater->pBt->mutex);
      pLater->locked = 1;

    }
  }
}

/*
** Exit the recursive mutex on a Btree.
*/
SQLITE_PRIVATE void sqlite3BtreeLeave(Btree *p){
  if( p->sharable ){
    assert( p->wantToLock>0 );
    p->wantToLock--;
    if( p->wantToLock==0 ){
      assert( p->locked );
      sqlite3_mutex_leave(p->pBt->mutex);
      p->locked = 0;
    }
  }
}

#ifndef NDEBUG
/*
** Return true if the BtShared mutex is held on the btree.  
**
** This routine makes no determination one way or another if the
** database connection mutex is held.
**
** This routine is used only from within assert() statements.
*/
SQLITE_PRIVATE int sqlite3BtreeHoldsMutex(Btree *p){
  return (p->sharable==0 ||

             (p->locked && p->wantToLock && sqlite3_mutex_held(p->pBt->mutex)));



}
#endif


#ifndef SQLITE_OMIT_INCRBLOB
/*
** Enter and leave a mutex on a Btree given a cursor owned by that
................................................................................
*/
SQLITE_PRIVATE void sqlite3BtreeEnterAll(sqlite3 *db){
  int i;
  Btree *p, *pLater;
  assert( sqlite3_mutex_held(db->mutex) );
  for(i=0; i<db->nDb; i++){
    p = db->aDb[i].pBt;

    if( p && p->sharable ){
      p->wantToLock++;
      if( !p->locked ){
        assert( p->wantToLock==1 );
        while( p->pPrev ) p = p->pPrev;
        while( p->locked && p->pNext ) p = p->pNext;
        for(pLater = p->pNext; pLater; pLater=pLater->pNext){
          if( pLater->locked ){
            sqlite3_mutex_leave(pLater->pBt->mutex);
            pLater->locked = 0;
          }
        }
        while( p ){
          sqlite3_mutex_enter(p->pBt->mutex);
          p->locked++;
          p = p->pNext;
        }
      }
    }
  }
}
SQLITE_PRIVATE void sqlite3BtreeLeaveAll(sqlite3 *db){
................................................................................
  assert( sqlite3_mutex_held(db->mutex) );
  for(i=0; i<db->nDb; i++){
    p = db->aDb[i].pBt;
    if( p && p->sharable ){
      assert( p->wantToLock>0 );
      p->wantToLock--;
      if( p->wantToLock==0 ){
        assert( p->locked );
        sqlite3_mutex_leave(p->pBt->mutex);
        p->locked = 0;
      }
    }
  }
}

#ifndef NDEBUG
/*
................................................................................
    assert( !p->locked || p->wantToLock>0 );

    /* We should already hold a lock on the database connection */
    assert( sqlite3_mutex_held(p->db->mutex) );

    p->wantToLock++;
    if( !p->locked && p->sharable ){
      sqlite3_mutex_enter(p->pBt->mutex);
      p->locked = 1;
    }
  }
}

/*
** Leave the mutex of every btree in the group.
*/
................................................................................
    assert( p->wantToLock>0 );

    /* We should already hold a lock on the database connection */
    assert( sqlite3_mutex_held(p->db->mutex) );

    p->wantToLock--;
    if( p->wantToLock==0 && p->locked ){
      sqlite3_mutex_leave(p->pBt->mutex);
      p->locked = 0;
    }
  }
}















#endif  /* SQLITE_THREADSAFE && !SQLITE_OMIT_SHARED_CACHE */

/************** End of btmutex.c *********************************************/
/************** Begin file btree.c *******************************************/
/*
** 2004 April 6
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.582 2009/03/30 18:50:05 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
** Including a description of file format and an overview of operation.
*/

/*
................................................................................
  BtShared *pBt = p->pBt;
  BtLock *pIter;

  assert( sqlite3BtreeHoldsMutex(p) );
  assert( eLock==READ_LOCK || eLock==WRITE_LOCK );
  assert( p->db!=0 );
  







  /* This is a no-op if the shared-cache is not enabled */
  if( !p->sharable ){
    return SQLITE_OK;
  }

  /* If some other connection is holding an exclusive lock, the
  ** requested lock may not be obtained.
................................................................................
  */
  if( 
    0==(p->db->flags&SQLITE_ReadUncommitted) || 
    eLock==WRITE_LOCK ||
    iTab==MASTER_ROOT
  ){
    for(pIter=pBt->pLock; pIter; pIter=pIter->pNext){











      if( pIter->pBtree!=p && pIter->iTable==iTab && 
          (pIter->eLock!=eLock || eLock!=READ_LOCK) ){
        sqlite3ConnectionBlocked(p->db, pIter->pBtree->db);
        if( eLock==WRITE_LOCK ){
          assert( p==pBt->pWriter );
          pBt->isPending = 1;
        }
        return SQLITE_LOCKED_SHAREDCACHE;
      }
................................................................................
}
#endif /* !SQLITE_OMIT_SHARED_CACHE */

#ifndef SQLITE_OMIT_SHARED_CACHE
/*
** Release all the table locks (locks obtained via calls to
** the setSharedCacheTableLock() procedure) held by Btree handle p.




*/
static void clearAllSharedCacheTableLocks(Btree *p){
  BtShared *pBt = p->pBt;
  BtLock **ppIter = &pBt->pLock;

  assert( sqlite3BtreeHoldsMutex(p) );
  assert( p->sharable || 0==*ppIter );


  while( *ppIter ){
    BtLock *pLock = *ppIter;
    assert( pBt->isExclusive==0 || pBt->pWriter==pLock->pBtree );

    if( pLock->pBtree==p ){
      *ppIter = pLock->pNext;
      sqlite3_free(pLock);
    }else{
      ppIter = &pLock->pNext;
    }
  }
................................................................................

/*
** Compute the total number of bytes that a Cell needs in the cell
** data area of the btree-page.  The return number includes the cell
** data header and the local payload, but not any overflow page or
** the space used by the cell pointer.
*/
#ifndef NDEBUG
static u16 cellSize(MemPage *pPage, int iCell){
  CellInfo info;
  sqlite3BtreeParseCell(pPage, iCell, &info);

  return info.nSize;
}


#endif
static u16 cellSizePtr(MemPage *pPage, u8 *pCell){

  CellInfo info;
  sqlite3BtreeParseCellPtr(pPage, pCell, &info);



































  return info.nSize;
}






#ifndef SQLITE_OMIT_AUTOVACUUM
/*
** If the cell pCell, part of page pPage contains a pointer
** to an overflow page, insert an entry into the pointer-map
** for the overflow page.
*/
................................................................................
  if( cbrk-addr!=pPage->nFree ){
    return SQLITE_CORRUPT_BKPT;
  }
  return SQLITE_OK;
}

/*
** Allocate nByte bytes of space on a page.


**
** Return the index into pPage->aData[] of the first byte of
** the new allocation.  The caller guarantees that there is enough
** space.  This routine will never fail.


**
** If the page contains nBytes of free space but does not contain
** nBytes of contiguous free space, then this routine automatically
** calls defragmentPage() to consolidate all free space before 
** allocating the new chunk.



*/
static int allocateSpace(MemPage *pPage, int nByte){
  int addr, pc, hdr;
  int size;
  int nFrag;



  int top;
  int nCell;
  int cellOffset;
  unsigned char *data;
  
  data = pPage->aData;
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  assert( pPage->pBt );
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( nByte>=0 );  /* Minimum cell size is 4 */
  assert( pPage->nFree>=nByte );
  assert( pPage->nOverflow==0 );
  pPage->nFree -= (u16)nByte;

  hdr = pPage->hdrOffset;







  nFrag = data[hdr+7];
  if( nFrag<60 ){


    /* Search the freelist looking for a slot big enough to satisfy the
    ** space request. */
    addr = hdr+1;




    while( (pc = get2byte(&data[addr]))>0 ){
      size = get2byte(&data[pc+2]);
      if( size>=nByte ){
        int x = size - nByte;
        if( size<nByte+4 ){



          memcpy(&data[addr], &data[pc], 2);
          data[hdr+7] = (u8)(nFrag + x);
          return pc;
        }else{


          put2byte(&data[pc+2], x);

          return pc + x;
        }
      }
      addr = pc;
    }
  }

  /* Allocate memory from the gap in between the cell pointer array
  ** and the cell content area.
  */
  top = get2byte(&data[hdr+5]);
  nCell = get2byte(&data[hdr+3]);
  cellOffset = pPage->cellOffset;
  if( nFrag>=60 || cellOffset + 2*nCell > top - nByte ){
    defragmentPage(pPage);
    top = get2byte(&data[hdr+5]);
  }
  top -= nByte;
  assert( cellOffset + 2*nCell <= top );
  put2byte(&data[hdr+5], top);
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  return top;
}

/*
** Return a section of the pPage->aData to the freelist.
** The first byte of the new free block is pPage->aDisk[start]
** and the size of the block is "size" bytes.
................................................................................
**
** This routine needs to reset the extra data section at the end of the
** page to agree with the restored data.
*/
static void pageReinit(DbPage *pData){
  MemPage *pPage;
  pPage = (MemPage *)sqlite3PagerGetExtra(pData);

  if( pPage->isInit ){
    assert( sqlite3_mutex_held(pPage->pBt->mutex) );
    pPage->isInit = 0;
    if( sqlite3PagerPageRefcount(pData)>0 ){
      /* pPage might not be a btree page;  it might be an overflow page
      ** or ptrmap page or a free page.  In those cases, the following
      ** call to sqlite3BtreeInitPage() will likely return SQLITE_CORRUPT.
      ** But no harm is done by this.  And it is very important that
      ** sqlite3BtreeInitPage() be called on every btree page so we make
      ** the call for every page that comes in for re-initing. */
      sqlite3BtreeInitPage(pPage);
................................................................................
** Open a database file.
** 
** zFilename is the name of the database file.  If zFilename is NULL
** a new database with a random name is created.  This randomly named
** database file will be deleted when sqlite3BtreeClose() is called.
** If zFilename is ":memory:" then an in-memory database is created
** that is automatically destroyed when it is closed.






*/
SQLITE_PRIVATE int sqlite3BtreeOpen(
  const char *zFilename,  /* Name of the file containing the BTree database */
  sqlite3 *db,            /* Associated database handle */
  Btree **ppBtree,        /* Pointer to new Btree object written here */
  int flags,              /* Options */
  int vfsFlags            /* Flags passed through to sqlite3_vfs.xOpen() */
................................................................................
  p->db = db;

#if !defined(SQLITE_OMIT_SHARED_CACHE) && !defined(SQLITE_OMIT_DISKIO)
  /*
  ** If this Btree is a candidate for shared cache, try to find an
  ** existing BtShared object that we can share with
  */
  if( isMemdb==0
   && (db->flags & SQLITE_Vtab)==0
   && zFilename && zFilename[0]
  ){
    if( sqlite3GlobalConfig.sharedCacheEnabled ){
      int nFullPathname = pVfs->mxPathname+1;
      char *zFullPathname = sqlite3Malloc(nFullPathname);
      sqlite3_mutex *mutexShared;
      p->sharable = 1;
      db->flags |= SQLITE_SharedCache;
      if( !zFullPathname ){
................................................................................
      sqlite3_mutex_enter(mutexOpen);
      mutexShared = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
      sqlite3_mutex_enter(mutexShared);
      for(pBt=GLOBAL(BtShared*,sqlite3SharedCacheList); pBt; pBt=pBt->pNext){
        assert( pBt->nRef>0 );
        if( 0==strcmp(zFullPathname, sqlite3PagerFilename(pBt->pPager))
                 && sqlite3PagerVfs(pBt->pPager)==pVfs ){











          p->pBt = pBt;
          pBt->nRef++;
          break;
        }
      }
      sqlite3_mutex_leave(mutexShared);
      sqlite3_free(zFullPathname);
................................................................................
                          EXTRA_SIZE, flags, vfsFlags);
    if( rc==SQLITE_OK ){
      rc = sqlite3PagerReadFileheader(pBt->pPager,sizeof(zDbHeader),zDbHeader);
    }
    if( rc!=SQLITE_OK ){
      goto btree_open_out;
    }

    sqlite3PagerSetBusyhandler(pBt->pPager, btreeInvokeBusyHandler, pBt);
    p->pBt = pBt;
  
    sqlite3PagerSetReiniter(pBt->pPager, pageReinit);
    pBt->pCursor = 0;
    pBt->pPage1 = 0;
    pBt->readOnly = sqlite3PagerIsreadonly(pBt->pPager);
    pBt->pageSize = get2byte(&zDbHeader[16]);
    if( pBt->pageSize<512 || pBt->pageSize>SQLITE_MAX_PAGE_SIZE
         || ((pBt->pageSize-1)&pBt->pageSize)!=0 ){
      pBt->pageSize = 0;
      sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize);
#ifndef SQLITE_OMIT_AUTOVACUUM
      /* If the magic name ":memory:" will create an in-memory database, then
      ** leave the autoVacuum mode at 0 (do not auto-vacuum), even if
      ** SQLITE_DEFAULT_AUTOVACUUM is true. On the other hand, if
      ** SQLITE_OMIT_MEMORYDB has been defined, then ":memory:" is just a
      ** regular file-name. In this case the auto-vacuum applies as per normal.
      */
................................................................................
      nReserve = zDbHeader[20];
      pBt->pageSizeFixed = 1;
#ifndef SQLITE_OMIT_AUTOVACUUM
      pBt->autoVacuum = (get4byte(&zDbHeader[36 + 4*4])?1:0);
      pBt->incrVacuum = (get4byte(&zDbHeader[36 + 7*4])?1:0);
#endif
    }


    pBt->usableSize = pBt->pageSize - nReserve;
    assert( (pBt->pageSize & 7)==0 );  /* 8-byte alignment of pageSize */
    sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize);
   
#if !defined(SQLITE_OMIT_SHARED_CACHE) && !defined(SQLITE_OMIT_DISKIO)
    /* Add the new BtShared object to the linked list sharable BtShareds.
    */
    if( p->sharable ){
      sqlite3_mutex *mutexShared;
      pBt->nRef = 1;
................................................................................
SQLITE_PRIVATE int sqlite3BtreeClose(Btree *p){
  BtShared *pBt = p->pBt;
  BtCursor *pCur;

  /* Close all cursors opened via this handle.  */
  assert( sqlite3_mutex_held(p->db->mutex) );
  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  pCur = pBt->pCursor;
  while( pCur ){
    BtCursor *pTmp = pCur;
    pCur = pCur->pNext;
    if( pTmp->pBtree==p ){
      sqlite3BtreeCloseCursor(pTmp);
    }
................................................................................
  sqlite3BtreeLeave(p);
  return rc;
}

#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) || !defined(SQLITE_OMIT_VACUUM)
/*
** Change the default pages size and the number of reserved bytes per page.


**
** The page size must be a power of 2 between 512 and 65536.  If the page
** size supplied does not meet this constraint then the page size is not
** changed.
**
** Page sizes are constrained to be a power of two so that the region
** of the database file used for locking (beginning at PENDING_BYTE,
** the first byte past the 1GB boundary, 0x40000000) needs to occur
** at the beginning of a page.
**
** If parameter nReserve is less than zero, then the number of reserved
** bytes per page is left unchanged.



*/
SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree *p, int pageSize, int nReserve){
  int rc = SQLITE_OK;
  BtShared *pBt = p->pBt;
  assert( nReserve>=-1 && nReserve<=255 );
  sqlite3BtreeEnter(p);
  if( pBt->pageSizeFixed ){
    sqlite3BtreeLeave(p);
    return SQLITE_READONLY;
................................................................................
    assert( (pageSize & 7)==0 );
    assert( !pBt->pPage1 && !pBt->pCursor );
    pBt->pageSize = (u16)pageSize;
    freeTempSpace(pBt);
    rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize);
  }
  pBt->usableSize = pBt->pageSize - (u16)nReserve;

  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Return the currently defined page size
*/
................................................................................
*/
static int lockBtree(BtShared *pBt){
  int rc;
  MemPage *pPage1;
  int nPage;

  assert( sqlite3_mutex_held(pBt->mutex) );
  if( pBt->pPage1 ) return SQLITE_OK;
  rc = sqlite3BtreeGetPage(pBt, 1, &pPage1, 0);
  if( rc!=SQLITE_OK ) return rc;

  /* Do some checking to help insure the file we opened really is
  ** a valid database file. 
  */
  rc = sqlite3PagerPagecount(pBt->pPager, &nPage);
................................................................................
      ** zero and return SQLITE_OK. The caller will call this function
      ** again with the correct page-size.
      */
      releasePage(pPage1);
      pBt->usableSize = (u16)usableSize;
      pBt->pageSize = (u16)pageSize;
      freeTempSpace(pBt);
      sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize);

      return SQLITE_OK;
    }
    if( usableSize<500 ){
      goto page1_init_failed;
    }
    pBt->pageSize = (u16)pageSize;
    pBt->usableSize = (u16)usableSize;
................................................................................
** If there is a transaction in progress, this routine is a no-op.
*/
static void unlockBtreeIfUnused(BtShared *pBt){
  assert( sqlite3_mutex_held(pBt->mutex) );
  if( pBt->inTransaction==TRANS_NONE && pBt->pCursor==0 && pBt->pPage1!=0 ){
    if( sqlite3PagerRefcount(pBt->pPager)>=1 ){
      assert( pBt->pPage1->aData );
#if 0
      if( pBt->pPage1->aData==0 ){
        MemPage *pPage = pBt->pPage1;
        pPage->aData = sqlite3PagerGetData(pPage->pDbPage);
        pPage->pBt = pBt;
        pPage->pgno = 1;
      }
#endif
      releasePage(pBt->pPage1);
    }
    pBt->pPage1 = 0;
  }
}

/*
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeBeginTrans(Btree *p, int wrflag){
  sqlite3 *pBlock = 0;
  BtShared *pBt = p->pBt;
  int rc = SQLITE_OK;

  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  btreeIntegrity(p);

  /* If the btree is already in a write-transaction, or it
  ** is already in a read-transaction and a read-transaction
  ** is requested, this is a no-op.
  */
  if( p->inTrans==TRANS_WRITE || (p->inTrans==TRANS_READ && !wrflag) ){
................................................................................
    sqlite3ConnectionBlocked(p->db, pBlock);
    rc = SQLITE_LOCKED_SHAREDCACHE;
    goto trans_begun;
  }
#endif

  do {
    if( pBt->pPage1==0 ){
      do{
        rc = lockBtree(pBt);




      }while( pBt->pPage1==0 && rc==SQLITE_OK );
    }

    if( rc==SQLITE_OK && wrflag ){
      if( pBt->readOnly ){
        rc = SQLITE_READONLY;
      }else{
        rc = sqlite3PagerBegin(pBt->pPager, wrflag>1);
        if( rc==SQLITE_OK ){
          rc = newDatabase(pBt);
        }
      }
    }
  
    if( rc!=SQLITE_OK ){
................................................................................

set_child_ptrmaps_out:
  pPage->isInit = isInitOrig;
  return rc;
}

/*
** Somewhere on pPage, which is guarenteed to be a btree page, not an overflow
** page, is a pointer to page iFrom. Modify this pointer so that it points to
** iTo. Parameter eType describes the type of pointer to be modified, as 
** follows:
**
** PTRMAP_BTREE:     pPage is a btree-page. The pointer points at a child 
**                   page of pPage.
**
................................................................................
** number of pages the database file will contain after this 
** process is complete.
*/
static int incrVacuumStep(BtShared *pBt, Pgno nFin, Pgno iLastPg){
  Pgno nFreeList;           /* Number of pages still on the free-list */

  assert( sqlite3_mutex_held(pBt->mutex) );


  if( !PTRMAP_ISPAGE(pBt, iLastPg) && iLastPg!=PENDING_BYTE_PAGE(pBt) ){
    int rc;
    u8 eType;
    Pgno iPtrPage;

    nFreeList = get4byte(&pBt->pPage1->aData[36]);
    if( nFreeList==0 || nFin==iLastPg ){
      return SQLITE_DONE;
    }

    rc = ptrmapGet(pBt, iLastPg, &eType, &iPtrPage);
    if( rc!=SQLITE_OK ){
      return rc;
    }
................................................................................
** SQLITE_OK is returned. Otherwise an SQLite error code. 
*/
SQLITE_PRIVATE int sqlite3BtreeIncrVacuum(Btree *p){
  int rc;
  BtShared *pBt = p->pBt;

  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  assert( pBt->inTransaction==TRANS_WRITE && p->inTrans==TRANS_WRITE );
  if( !pBt->autoVacuum ){
    rc = SQLITE_DONE;
  }else{
    invalidateAllOverflowCache(pBt);
    rc = incrVacuumStep(pBt, 0, pagerPagecount(pBt));
  }
................................................................................
    Pgno nFin;
    Pgno nFree;
    Pgno nPtrmap;
    Pgno iFree;
    const int pgsz = pBt->pageSize;
    Pgno nOrig = pagerPagecount(pBt);

    if( PTRMAP_ISPAGE(pBt, nOrig) ){




      return SQLITE_CORRUPT_BKPT;
    }
    if( nOrig==PENDING_BYTE_PAGE(pBt) ){
      nOrig--;
    }
    nFree = get4byte(&pBt->pPage1->aData[36]);
    nPtrmap = (nFree-nOrig+PTRMAP_PAGENO(pBt, nOrig)+pgsz/5)/(pgsz/5);
    nFin = nOrig - nFree - nPtrmap;
    if( nOrig>PENDING_BYTE_PAGE(pBt) && nFin<=PENDING_BYTE_PAGE(pBt) ){
      nFin--;
    }
    while( PTRMAP_ISPAGE(pBt, nFin) || nFin==PENDING_BYTE_PAGE(pBt) ){
      nFin--;
    }

    for(iFree=nOrig; iFree>nFin && rc==SQLITE_OK; iFree--){
................................................................................
** and populated with enough information so that if a power loss occurs
** the database can be restored to its original state by playing back
** the journal.  Then the contents of the journal are flushed out to
** the disk.  After the journal is safely on oxide, the changes to the
** database are written into the database file and flushed to oxide.
** At the end of this call, the rollback journal still exists on the
** disk and we are still holding all locks, so the transaction has not
** committed.  See sqlite3BtreeCommit() for the second phase of the
** commit process.
**
** This call is a no-op if no write-transaction is currently active on pBt.
**
** Otherwise, sync the database file for the btree pBt. zMaster points to
** the name of a master journal file that should be written into the
** individual journal file, or is NULL, indicating no master journal file 
................................................................................
** the write-transaction for this database file is to delete the journal.
*/
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseOne(Btree *p, const char *zMaster){
  int rc = SQLITE_OK;
  if( p->inTrans==TRANS_WRITE ){
    BtShared *pBt = p->pBt;
    sqlite3BtreeEnter(p);
    pBt->db = p->db;
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( pBt->autoVacuum ){
      rc = autoVacuumCommit(pBt);
      if( rc!=SQLITE_OK ){
        sqlite3BtreeLeave(p);
        return rc;
      }
................................................................................
  return rc;
}

/*
** Commit the transaction currently in progress.
**
** This routine implements the second phase of a 2-phase commit.  The
** sqlite3BtreeSync() routine does the first phase and should be invoked
** prior to calling this routine.  The sqlite3BtreeSync() routine did
** all the work of writing information out to disk and flushing the
** contents so that they are written onto the disk platter.  All this
** routine has to do is delete or truncate the rollback journal
** (which causes the transaction to commit) and drop locks.

**
** This will release the write lock on the database file.  If there
** are no active cursors, it also releases the read lock.
*/
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseTwo(Btree *p){
  BtShared *pBt = p->pBt;

  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  btreeIntegrity(p);

  /* If the handle has a write-transaction open, commit the shared-btrees 
  ** transaction and set the shared state to TRANS_READ.
  */
  if( p->inTrans==TRANS_WRITE ){
    int rc;
................................................................................
    rc = sqlite3PagerCommitPhaseTwo(pBt->pPager);
    if( rc!=SQLITE_OK ){
      sqlite3BtreeLeave(p);
      return rc;
    }
    pBt->inTransaction = TRANS_READ;
  }
  clearAllSharedCacheTableLocks(p);

  /* If the handle has any kind of transaction open, decrement the transaction
  ** count of the shared btree. If the transaction count reaches 0, set
  ** the shared state to TRANS_NONE. The unlockBtreeIfUnused() call below
  ** will unlock the pager.
  */
  if( p->inTrans!=TRANS_NONE ){

    pBt->nTransaction--;
    if( 0==pBt->nTransaction ){
      pBt->inTransaction = TRANS_NONE;
    }
  }

  /* Set the handles current transaction state to TRANS_NONE and unlock
  ** the pager if this call closed the only read or write transaction.
  */
  btreeClearHasContent(pBt);
  p->inTrans = TRANS_NONE;
  unlockBtreeIfUnused(pBt);

  btreeIntegrity(p);
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeRollback(Btree *p){
  int rc;
  BtShared *pBt = p->pBt;
  MemPage *pPage1;

  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  rc = saveAllCursors(pBt, 0, 0);
#ifndef SQLITE_OMIT_SHARED_CACHE
  if( rc!=SQLITE_OK ){
    /* This is a horrible situation. An IO or malloc() error occurred whilst
    ** trying to save cursor positions. If this is an automatic rollback (as
    ** the result of a constraint, malloc() failure or IO error) then 
    ** the cache may be internally inconsistent (not contain valid trees) so
................................................................................
    ** we cannot simply return the error to the caller. Instead, abort 
    ** all queries that may be using any of the cursors that failed to save.
    */
    sqlite3BtreeTripAllCursors(p, rc);
  }
#endif
  btreeIntegrity(p);
  clearAllSharedCacheTableLocks(p);

  if( p->inTrans==TRANS_WRITE ){
    int rc2;

    assert( TRANS_WRITE==pBt->inTransaction );
    rc2 = sqlite3PagerRollback(pBt->pPager);
    if( rc2!=SQLITE_OK ){
................................................................................
      releasePage(pPage1);
    }
    assert( countWriteCursors(pBt)==0 );
    pBt->inTransaction = TRANS_READ;
  }

  if( p->inTrans!=TRANS_NONE ){

    assert( pBt->nTransaction>0 );
    pBt->nTransaction--;
    if( 0==pBt->nTransaction ){
      pBt->inTransaction = TRANS_NONE;
    }
  }

................................................................................
** iStatement is 1. This anonymous savepoint can be released or rolled back
** using the sqlite3BtreeSavepoint() function.
*/
SQLITE_PRIVATE int sqlite3BtreeBeginStmt(Btree *p, int iStatement){
  int rc;
  BtShared *pBt = p->pBt;
  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  assert( p->inTrans==TRANS_WRITE );
  assert( pBt->readOnly==0 );
  assert( iStatement>0 );
  assert( iStatement>p->db->nSavepoint );
  if( NEVER(p->inTrans!=TRANS_WRITE || pBt->readOnly) ){
    rc = SQLITE_INTERNAL;
  }else{
................................................................................
SQLITE_PRIVATE int sqlite3BtreeSavepoint(Btree *p, int op, int iSavepoint){
  int rc = SQLITE_OK;
  if( p && p->inTrans==TRANS_WRITE ){
    BtShared *pBt = p->pBt;
    assert( op==SAVEPOINT_RELEASE || op==SAVEPOINT_ROLLBACK );
    assert( iSavepoint>=0 || (iSavepoint==-1 && op==SAVEPOINT_ROLLBACK) );
    sqlite3BtreeEnter(p);
    pBt->db = p->db;
    rc = sqlite3PagerSavepoint(pBt->pPager, op, iSavepoint);
    if( rc==SQLITE_OK ){
      rc = newDatabase(pBt);
    }
    sqlite3BtreeLeave(p);
  }
  return rc;
................................................................................
  int iTable,                                 /* Root page of table to open */
  int wrFlag,                                 /* 1 to write. 0 read-only */
  struct KeyInfo *pKeyInfo,                   /* First arg to xCompare() */
  BtCursor *pCur                              /* Write new cursor here */
){
  int rc;
  sqlite3BtreeEnter(p);
  p->pBt->db = p->db;
  rc = btreeCursor(p, iTable, wrFlag, pKeyInfo, pCur);
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Return the size of a BtCursor object in bytes.
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeCloseCursor(BtCursor *pCur){
  Btree *pBtree = pCur->pBtree;
  if( pBtree ){
    int i;
    BtShared *pBt = pCur->pBt;
    sqlite3BtreeEnter(pBtree);
    pBt->db = pBtree->db;
    sqlite3BtreeClearCursor(pCur);
    if( pCur->pPrev ){
      pCur->pPrev->pNext = pCur->pNext;
    }else{
      pBt->pCursor = pCur->pNext;
    }
    if( pCur->pNext ){
................................................................................
** or set *pRes to 1 if the table is empty.
*/
SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor *pCur, int *pRes){
  int rc;
 
  assert( cursorHoldsMutex(pCur) );
  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
















  rc = moveToRoot(pCur);
  if( rc==SQLITE_OK ){
    if( CURSOR_INVALID==pCur->eState ){
      assert( pCur->apPage[pCur->iPage]->nCell==0 );
      *pRes = 1;
    }else{
      assert( pCur->eState==CURSOR_VALID );
      *pRes = 0;
      rc = moveToRightmost(pCur);
      getCellInfo(pCur);
      pCur->atLast = rc==SQLITE_OK ?1:0;
    }
  }
  return rc;
}

/* Move the cursor so that it points to an entry near the key 
................................................................................
    }
    if( biasRight ){
      pCur->aiIdx[pCur->iPage] = (u16)upr;
    }else{
      pCur->aiIdx[pCur->iPage] = (u16)((upr+lwr)/2);
    }
    for(;;){
      void *pCellKey;
      i64 nCellKey;
      int idx = pCur->aiIdx[pCur->iPage];


      pCur->info.nSize = 0;
      pCur->validNKey = 1;
      if( pPage->intKey ){
        u8 *pCell;
        pCell = findCell(pPage, idx) + pPage->childPtrSize;
        if( pPage->hasData ){
          u32 dummy;
          pCell += getVarint32(pCell, dummy);
        }
        getVarint(pCell, (u64*)&nCellKey);
        if( nCellKey==intKey ){
          c = 0;
        }else if( nCellKey<intKey ){
          c = -1;
        }else{
          assert( nCellKey>intKey );
          c = +1;
        }


      }else{
        int available;
        pCellKey = (void *)fetchPayload(pCur, &available, 0);
        nCellKey = pCur->info.nKey;
        if( available>=nCellKey ){











          c = sqlite3VdbeRecordCompare((int)nCellKey, pCellKey, pIdxKey);






        }else{








          pCellKey = sqlite3Malloc( (int)nCellKey );
          if( pCellKey==0 ){
            rc = SQLITE_NOMEM;
            goto moveto_finish;
          }
          rc = sqlite3BtreeKey(pCur, 0, (int)nCellKey, (void*)pCellKey);
          c = sqlite3VdbeRecordCompare((int)nCellKey, pCellKey, pIdxKey);
          sqlite3_free(pCellKey);
          if( rc ) goto moveto_finish;
        }
      }
      if( c==0 ){
        pCur->info.nKey = nCellKey;
        if( pPage->intKey && !pPage->leaf ){
          lwr = idx;
          upr = lwr - 1;
          break;
        }else{
          *pRes = 0;
          rc = SQLITE_OK;
................................................................................
      }
      if( c<0 ){
        lwr = idx+1;
      }else{
        upr = idx-1;
      }
      if( lwr>upr ){
        pCur->info.nKey = nCellKey;
        break;
      }
      pCur->aiIdx[pCur->iPage] = (u16)((lwr+upr)/2);
    }
    assert( lwr==upr+1 );
    assert( pPage->isInit );
    if( pPage->leaf ){
................................................................................
  const void *pKey,   /* Packed key if the btree is an index */
  i64 nKey,           /* Integer key for tables.  Size of pKey for indices */
  int bias,           /* Bias search to the high end */
  int *pRes           /* Write search results here */
){
  int rc;                    /* Status code */
  UnpackedRecord *pIdxKey;   /* Unpacked index key */
  UnpackedRecord aSpace[16]; /* Temp space for pIdxKey - to avoid a malloc */


  if( pKey ){
    assert( nKey==(i64)(int)nKey );
    pIdxKey = sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey,
                                      aSpace, sizeof(aSpace));
    if( pIdxKey==0 ) return SQLITE_NOMEM;
  }else{
................................................................................
  assert( pBt->usableSize > 4 );
  ovflPageSize = pBt->usableSize - 4;
  nOvfl = (info.nPayload - info.nLocal + ovflPageSize - 1)/ovflPageSize;
  assert( ovflPgno==0 || nOvfl>0 );
  while( nOvfl-- ){
    Pgno iNext = 0;
    MemPage *pOvfl = 0;
    if( ovflPgno==0 || ovflPgno>pagerPagecount(pBt) ){



      return SQLITE_CORRUPT_BKPT;
    }
    if( nOvfl ){
      rc = getOverflowPage(pBt, ovflPgno, &pOvfl, &iNext);
      if( rc ) return rc;
    }
    rc = freePage2(pBt, pOvfl, ovflPgno);
................................................................................
    if( pPage->pBt->autoVacuum ){
      /* The cell may contain a pointer to an overflow page. If so, write
      ** the entry for the overflow page into the pointer map.
      */
      CellInfo info;
      sqlite3BtreeParseCellPtr(pPage, pCell, &info);
      assert( (info.nData+(pPage->intKey?0:info.nKey))==info.nPayload );
      if( (info.nData+(pPage->intKey?0:info.nKey))>info.nLocal ){
        Pgno pgnoOvfl = get4byte(&pCell[info.iOverflow]);
        rc = ptrmapPut(pPage->pBt, pgnoOvfl, PTRMAP_OVERFLOW1, pPage->pgno);
        if( rc!=SQLITE_OK ) return rc;
      }
    }
#endif
  }
................................................................................
static void assemblePage(
  MemPage *pPage,   /* The page to be assemblied */
  int nCell,        /* The number of cells to add to this page */
  u8 **apCell,      /* Pointers to cell bodies */
  u16 *aSize        /* Sizes of the cells */
){
  int i;            /* Loop counter */
  int totalSize;    /* Total size of all cells */
  int hdr;          /* Index of page header */
  int cellptr;      /* Address of next cell pointer */
  int cellbody;     /* Address of next cell body */
  u8 *data;         /* Data for the page */

  assert( pPage->nOverflow==0 );
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( nCell>=0 && nCell<=MX_CELL(pPage->pBt) && MX_CELL(pPage->pBt)<=5460 );
  totalSize = 0;
  for(i=0; i<nCell; i++){
    totalSize += aSize[i];
  }
  assert( totalSize+2*nCell<=pPage->nFree );
  assert( pPage->nCell==0 );
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  cellptr = pPage->cellOffset;
  data = pPage->aData;
  hdr = pPage->hdrOffset;
  put2byte(&data[hdr+3], nCell);
  if( nCell ){
    cellbody = allocateSpace(pPage, totalSize);
    assert( cellbody>0 );
    assert( pPage->nFree >= 2*nCell );
    pPage->nFree -= 2*nCell;
    for(i=0; i<nCell; i++){
      put2byte(&data[cellptr], cellbody);
      memcpy(&data[cellbody], apCell[i], aSize[i]);
      cellptr += 2;
      cellbody += aSize[i];
    }
    assert( cellbody==pPage->pBt->usableSize );
  }
  pPage->nCell = (u16)nCell;
}

/*
** The following parameters determine how many adjacent pages get involved
** in a balancing operation.  NN is the number of neighbors on either side
** of the page that participate in the balancing operation.  NB is the
................................................................................
  apCell = sqlite3ScratchMalloc( szScratch ); 
  if( apCell==0 ){
    rc = SQLITE_NOMEM;
    goto balance_cleanup;
  }
  szCell = (u16*)&apCell[nMaxCells];
  aCopy[0] = (u8*)&szCell[nMaxCells];
  assert( ((aCopy[0] - (u8*)0) & 7)==0 ); /* 8-byte alignment required */
  for(i=1; i<NB; i++){
    aCopy[i] = &aCopy[i-1][pBt->pageSize+ROUND8(sizeof(MemPage))];
    assert( ((aCopy[i] - (u8*)0) & 7)==0 ); /* 8-byte alignment required */
  }
  aSpace1 = &aCopy[NB-1][pBt->pageSize+ROUND8(sizeof(MemPage))];
  assert( ((aSpace1 - (u8*)0) & 7)==0 ); /* 8-byte alignment required */
  if( ISAUTOVACUUM ){
    aFrom = &aSpace1[pBt->pageSize];
  }
  aSpace2 = sqlite3PageMalloc(pBt->pageSize);
  if( aSpace2==0 ){
    rc = SQLITE_NOMEM;
    goto balance_cleanup;
................................................................................
** Insert a new record into the BTree.  The key is given by (pKey,nKey)
** and the data is given by (pData,nData).  The cursor is used only to
** define what table the record should be inserted into.  The cursor
** is left pointing at a random location.
**
** For an INTKEY table, only the nKey value of the key is used.  pKey is
** ignored.  For a ZERODATA table, the pData and nData are both ignored.











*/
SQLITE_PRIVATE int sqlite3BtreeInsert(
  BtCursor *pCur,                /* Insert data into the table of this cursor */
  const void *pKey, i64 nKey,    /* The key of the new record */
  const void *pData, int nData,  /* The data of the new record */
  int nZero,                     /* Number of extra 0 bytes to append to data */
  int appendBias                 /* True if this is likely an append */

){
  int rc;
  int loc;
  int szNew;
  int idx;
  MemPage *pPage;
  Btree *p = pCur->pBtree;
  BtShared *pBt = p->pBt;
  unsigned char *oldCell;
  unsigned char *newCell = 0;
................................................................................
    assert( rc==SQLITE_LOCKED_SHAREDCACHE );
    return rc;
  }
  if( pCur->eState==CURSOR_FAULT ){
    return pCur->skip;
  }

  /* Save the positions of any other cursors open on this table */
  sqlite3BtreeClearCursor(pCur);










  if( 
    SQLITE_OK!=(rc = saveAllCursors(pBt, pCur->pgnoRoot, pCur)) ||
    SQLITE_OK!=(rc = sqlite3BtreeMoveto(pCur, pKey, nKey, appendBias, &loc))
  ){
    return rc;
  }

  pPage = pCur->apPage[pCur->iPage];
  assert( pPage->intKey || nKey>=0 );
  assert( pPage->leaf || !pPage->intKey );
  TRACE(("INSERT: table=%d nkey=%lld ndata=%d page=%d %s\n",
................................................................................
    idx = ++pCur->aiIdx[pCur->iPage];
    pCur->info.nSize = 0;
    pCur->validNKey = 0;
  }else{
    assert( pPage->leaf );
  }
  rc = insertCell(pPage, idx, newCell, szNew, 0, 0);























  if( rc==SQLITE_OK ){


    rc = balance(pCur, 1);


  }


  /* Must make sure nOverflow is reset to zero even if the balance()
  ** fails.  Internal data structure corruption will result otherwise. */
  pCur->apPage[pCur->iPage]->nOverflow = 0;

  if( rc==SQLITE_OK ){
    moveToRoot(pCur);
  }
end_insert:
  return rc;
}

/*
** Delete the entry that the cursor is pointing to.  The cursor
** is left pointing at a arbitrary location.
................................................................................
        */
        VVA_ONLY( Pgno leafPgno = pLeafPage->pgno );
        rc = saveCursorPosition(&leafCur);
        if( rc==SQLITE_OK ){
          rc = sqlite3BtreeNext(&leafCur, &notUsed);
        }
        pLeafPage = leafCur.apPage[leafCur.iPage];
        assert( pLeafPage->pgno==leafPgno );
        assert( leafCur.aiIdx[leafCur.iPage]==0 );
      }

      if( SQLITE_OK==rc
       && SQLITE_OK==(rc = sqlite3PagerWrite(pLeafPage->pDbPage)) 
      ){
        dropCell(pLeafPage, 0, szNext);
        VVA_ONLY( leafCur.pagesShuffled = 0 );
................................................................................
  sqlite3PagerUnref(pRoot->pDbPage);
  *piTable = (int)pgnoRoot;
  return SQLITE_OK;
}
SQLITE_PRIVATE int sqlite3BtreeCreateTable(Btree *p, int *piTable, int flags){
  int rc;
  sqlite3BtreeEnter(p);
  p->pBt->db = p->db;
  rc = btreeCreateTable(p, piTable, flags);
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Erase the given database page and all its children.  Return
................................................................................
** integer value pointed to by pnChange is incremented by the number of
** entries in the table.
*/
SQLITE_PRIVATE int sqlite3BtreeClearTable(Btree *p, int iTable, int *pnChange){
  int rc;
  BtShared *pBt = p->pBt;
  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  assert( p->inTrans==TRANS_WRITE );
  if( (rc = checkForReadConflicts(p, iTable, 0, 1))!=SQLITE_OK ){
    /* nothing to do */
  }else if( SQLITE_OK!=(rc = saveAllCursors(pBt, iTable, 0)) ){
    /* nothing to do */
  }else{
    rc = clearDatabasePage(pBt, (Pgno)iTable, 0, pnChange);
................................................................................
    releasePage(pPage);
  }
  return rc;  
}
SQLITE_PRIVATE int sqlite3BtreeDropTable(Btree *p, int iTable, int *piMoved){
  int rc;
  sqlite3BtreeEnter(p);
  p->pBt->db = p->db;
  rc = btreeDropTable(p, iTable, piMoved);
  sqlite3BtreeLeave(p);
  return rc;
}


/*
................................................................................
SQLITE_PRIVATE int sqlite3BtreeGetMeta(Btree *p, int idx, u32 *pMeta){
  DbPage *pDbPage = 0;
  int rc;
  unsigned char *pP1;
  BtShared *pBt = p->pBt;

  sqlite3BtreeEnter(p);
  pBt->db = p->db;

  /* Reading a meta-data value requires a read-lock on page 1 (and hence
  ** the sqlite_master table. We grab this lock regardless of whether or
  ** not the SQLITE_ReadUncommitted flag is set (the table rooted at page
  ** 1 is treated as a special case by querySharedCacheTableLock()
  ** and setSharedCacheTableLock()).
  */
................................................................................
  /* If autovacuumed is disabled in this build but we are trying to 
  ** access an autovacuumed database, then make the database readonly. 
  */
#ifdef SQLITE_OMIT_AUTOVACUUM
  if( idx==4 && *pMeta>0 ) pBt->readOnly = 1;
#endif

  /* Grab the read-lock on page 1. */





  rc = setSharedCacheTableLock(p, 1, READ_LOCK);

  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Write meta-information back into the database.  Meta[0] is
** read-only and may not be written.
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeUpdateMeta(Btree *p, int idx, u32 iMeta){
  BtShared *pBt = p->pBt;
  unsigned char *pP1;
  int rc;
  assert( idx>=1 && idx<=15 );
  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  assert( p->inTrans==TRANS_WRITE );
  assert( pBt->pPage1!=0 );
  pP1 = pBt->pPage1->aData;
  rc = sqlite3PagerWrite(pBt->pPage1->pDbPage);
  if( rc==SQLITE_OK ){
    put4byte(&pP1[36 + idx*4], iMeta);
#ifndef SQLITE_OMIT_AUTOVACUUM
................................................................................
){
  int rc;
  u8 ePtrmapType;
  Pgno iPtrmapParent;

  rc = ptrmapGet(pCheck->pBt, iChild, &ePtrmapType, &iPtrmapParent);
  if( rc!=SQLITE_OK ){
    if( rc==SQLITE_NOMEM ) pCheck->mallocFailed = 1;
    checkAppendMsg(pCheck, zContext, "Failed to read ptrmap key=%d", iChild);
    return;
  }

  if( ePtrmapType!=eType || iPtrmapParent!=iParent ){
    checkAppendMsg(pCheck, zContext, 
      "Bad ptr map entry key=%d expected=(%d,%d) got=(%d,%d)", 
................................................................................
  /* Check that the page exists
  */
  pBt = pCheck->pBt;
  usableSize = pBt->usableSize;
  if( iPage==0 ) return 0;
  if( checkRef(pCheck, iPage, zParentContext) ) return 0;
  if( (rc = sqlite3BtreeGetPage(pBt, (Pgno)iPage, &pPage, 0))!=0 ){
    if( rc==SQLITE_NOMEM ) pCheck->mallocFailed = 1;
    checkAppendMsg(pCheck, zContext,
       "unable to get the page. error code=%d", rc);
    return 0;
  }
  if( (rc = sqlite3BtreeInitPage(pPage))!=0 ){
    assert( rc==SQLITE_CORRUPT );  /* The only possible error from InitPage */
    checkAppendMsg(pCheck, zContext, 
................................................................................
  Pgno i;
  int nRef;
  IntegrityCk sCheck;
  BtShared *pBt = p->pBt;
  char zErr[100];

  sqlite3BtreeEnter(p);
  pBt->db = p->db;
  nRef = sqlite3PagerRefcount(pBt->pPager);
  if( lockBtreeWithRetry(p)!=SQLITE_OK ){
    *pnErr = 1;
    sqlite3BtreeLeave(p);
    return sqlite3DbStrDup(0, "cannot acquire a read lock on the database");
  }
  sCheck.pBt = pBt;
................................................................................
*************************************************************************
**
** This file contains code use to manipulate "Mem" structure.  A "Mem"
** stores a single value in the VDBE.  Mem is an opaque structure visible
** only within the VDBE.  Interface routines refer to a Mem using the
** name sqlite_value
**
** $Id: vdbemem.c,v 1.139 2009/03/29 15:12:10 drh Exp $
*/

/*
** Call sqlite3VdbeMemExpandBlob() on the supplied value (type Mem*)
** P if required.
*/
#define expandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0)
................................................................................
  const int nByte = 32;

  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( !(fg&MEM_Zero) );
  assert( !(fg&(MEM_Str|MEM_Blob)) );
  assert( fg&(MEM_Int|MEM_Real) );
  assert( (pMem->flags&MEM_RowSet)==0 );



  if( sqlite3VdbeMemGrow(pMem, nByte, 0) ){
    return SQLITE_NOMEM;
  }

  /* For a Real or Integer, use sqlite3_mprintf() to produce the UTF-8
................................................................................
/*
** If the memory cell contains a string value that must be freed by
** invoking an external callback, free it now. Calling this function
** does not free any Mem.zMalloc buffer.
*/
SQLITE_PRIVATE void sqlite3VdbeMemReleaseExternal(Mem *p){
  assert( p->db==0 || sqlite3_mutex_held(p->db->mutex) );

  if( p->flags&MEM_Agg ){
    sqlite3VdbeMemFinalize(p, p->u.pDef);
    assert( (p->flags & MEM_Agg)==0 );
    sqlite3VdbeMemRelease(p);
  }else if( p->flags&MEM_Dyn && p->xDel ){
    assert( (p->flags&MEM_RowSet)==0 );
    p->xDel((void *)p->z);
    p->xDel = 0;
  }else if( p->flags&MEM_RowSet ){
    sqlite3RowSetClear(p->u.pRowSet);

  }
}

/*
** Release any memory held by the Mem. This may leave the Mem in an
** inconsistent state, for example with (Mem.z==0) and
** (Mem.type==SQLITE_TEXT).
................................................................................
** an SQL-NULL value, return 0.
**
** If pMem represents a string value, its encoding might be changed.
*/
SQLITE_PRIVATE i64 sqlite3VdbeIntValue(Mem *pMem){
  int flags;
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );

  flags = pMem->flags;
  if( flags & MEM_Int ){
    return pMem->u.i;
  }else if( flags & MEM_Real ){
    return doubleToInt64(pMem->r);
  }else if( flags & (MEM_Str|MEM_Blob) ){
    i64 value;
................................................................................
** Return the best representation of pMem that we can get into a
** double.  If pMem is already a double or an integer, return its
** value.  If it is a string or blob, try to convert it to a double.
** If it is a NULL, return 0.0.
*/
SQLITE_PRIVATE double sqlite3VdbeRealValue(Mem *pMem){
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );

  if( pMem->flags & MEM_Real ){
    return pMem->r;
  }else if( pMem->flags & MEM_Int ){
    return (double)pMem->u.i;
  }else if( pMem->flags & (MEM_Str|MEM_Blob) ){
    /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
    double val = (double)0;
................................................................................
** The MEM structure is already a MEM_Real.  Try to also make it a
** MEM_Int if we can.
*/
SQLITE_PRIVATE void sqlite3VdbeIntegerAffinity(Mem *pMem){
  assert( pMem->flags & MEM_Real );
  assert( (pMem->flags & MEM_RowSet)==0 );
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );


  pMem->u.i = doubleToInt64(pMem->r);
  if( pMem->r==(double)pMem->u.i ){
    pMem->flags |= MEM_Int;
  }
}

/*
** Convert pMem to type integer.  Invalidate any prior representations.
*/
SQLITE_PRIVATE int sqlite3VdbeMemIntegerify(Mem *pMem){
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( (pMem->flags & MEM_RowSet)==0 );


  pMem->u.i = sqlite3VdbeIntValue(pMem);
  MemSetTypeFlag(pMem, MEM_Int);
  return SQLITE_OK;
}

/*
** Convert pMem so that it is of type MEM_Real.
** Invalidate any prior representations.
*/
SQLITE_PRIVATE int sqlite3VdbeMemRealify(Mem *pMem){
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );


  pMem->r = sqlite3VdbeRealValue(pMem);
  MemSetTypeFlag(pMem, MEM_Real);
  return SQLITE_OK;
}

/*
** Convert pMem so that it has types MEM_Real or MEM_Int or both.
................................................................................
  }
  op = pExpr->op;

  if( op==TK_STRING || op==TK_FLOAT || op==TK_INTEGER ){
    zVal = sqlite3DbStrNDup(db, (char*)pExpr->token.z, pExpr->token.n);
    pVal = sqlite3ValueNew(db);
    if( !zVal || !pVal ) goto no_mem;
    sqlite3Dequote(zVal);
    sqlite3ValueSetStr(pVal, -1, zVal, SQLITE_UTF8, SQLITE_DYNAMIC);
    if( (op==TK_INTEGER || op==TK_FLOAT ) && affinity==SQLITE_AFF_NONE ){
      sqlite3ValueApplyAffinity(pVal, SQLITE_AFF_NUMERIC, enc);
    }else{
      sqlite3ValueApplyAffinity(pVal, affinity, enc);



    }
  }else if( op==TK_UMINUS ) {
    if( SQLITE_OK==sqlite3ValueFromExpr(db,pExpr->pLeft,enc,affinity,&pVal) ){
      pVal->u.i = -1 * pVal->u.i;
      /* (double)-1 In case of SQLITE_OMIT_FLOATING_POINT... */
      pVal->r = (double)-1 * pVal->r;
    }
................................................................................
**
*************************************************************************
** This file contains code used for creating, destroying, and populating
** a VDBE (or an "sqlite3_stmt" as it is known to the outside world.)  Prior
** to version 2.8.7, all this code was combined into the vdbe.c source file.
** But that file was getting too big so this subroutines were split out.
**
** $Id: vdbeaux.c,v 1.446 2009/03/25 15:43:09 danielk1977 Exp $
*/



/*
** When debugging the code generator in a symbolic debugger, one can
** set the sqlite3VdbeAddopTrace to 1 and all opcodes will be printed
................................................................................

/*
** Declare to the Vdbe that the BTree object at db->aDb[i] is used.
**
*/
SQLITE_PRIVATE void sqlite3VdbeUsesBtree(Vdbe *p, int i){
  int mask;
  assert( i>=0 && i<p->db->nDb );
  assert( i<(int)sizeof(p->btreeMask)*8 );
  mask = 1<<i;
  if( (p->btreeMask & mask)==0 ){
    p->btreeMask |= mask;
    sqlite3BtreeMutexArrayInsert(&p->aMutex, p->db->aDb[i].pBt);
  }
}


................................................................................
static void allocSpace(
  char *pp,            /* IN/OUT: Set *pp to point to allocated buffer */
  int nByte,           /* Number of bytes to allocate */
  u8 **ppFrom,         /* IN/OUT: Allocate from *ppFrom */
  u8 *pEnd,            /* Pointer to 1 byte past the end of *ppFrom buffer */
  int *pnByte          /* If allocation cannot be made, increment *pnByte */
){

  if( (*(void**)pp)==0 ){
    nByte = ROUND8(nByte);
    if( (pEnd - *ppFrom)>=nByte ){
      *(void**)pp = (void *)*ppFrom;
      *ppFrom += nByte;
    }else{
      *pnByte += nByte;
................................................................................
    u8 *zEnd = (u8 *)&p->aOp[p->nOpAlloc];
    int nByte;
    int nArg;       /* Maximum number of args passed to a user function. */
    resolveP2Values(p, &nArg);
    if( isExplain && nMem<10 ){
      nMem = 10;
    }




    do {
      memset(zCsr, 0, zEnd-zCsr);
      nByte = 0;
      allocSpace((char*)&p->aMem, nMem*sizeof(Mem), &zCsr, zEnd, &nByte);
      allocSpace((char*)&p->aVar, nVar*sizeof(Mem), &zCsr, zEnd, &nByte);
      allocSpace((char*)&p->apArg, nArg*sizeof(Mem*), &zCsr, zEnd, &nByte);
................................................................................
    }
    db->nStatement--;
    p->iStatement = 0;
  }
  return rc;
}




























/*
** This routine is called the when a VDBE tries to halt.  If the VDBE
** has made changes and is in autocommit mode, then commit those
** changes.  If a rollback is needed, then do the rollback.
**
** This routine is the only way to move the state of a VM from
** SQLITE_MAGIC_RUN to SQLITE_MAGIC_HALT.  It is harmless to
................................................................................
  /* No commit or rollback needed if the program never started */
  if( p->pc>=0 ){
    int mrc;   /* Primary error code from p->rc */
    int eStatementOp = 0;
    int isSpecialError;            /* Set to true if a 'special' error */

    /* Lock all btrees used by the statement */
    sqlite3BtreeMutexArrayEnter(&p->aMutex);

    /* Check for one of the special errors */
    mrc = p->rc & 0xff;
    isSpecialError = mrc==SQLITE_NOMEM || mrc==SQLITE_IOERR
                     || mrc==SQLITE_INTERRUPT || mrc==SQLITE_FULL;
    if( isSpecialError ){
      /* If the query was read-only, we need do no rollback at all. Otherwise,
................................................................................
** are always destroyed.  To destroy all auxdata entries, call this
** routine with mask==0.
*/
SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(VdbeFunc *pVdbeFunc, int mask){
  int i;
  for(i=0; i<pVdbeFunc->nAux; i++){
    struct AuxData *pAux = &pVdbeFunc->apAux[i];
    if( (i>31 || !(mask&(1<<i))) && pAux->pAux ){
      if( pAux->xDelete ){
        pAux->xDelete(pAux->pAux);
      }
      pAux->pAux = 0;
    }
  }
}
................................................................................
#ifdef SQLITE_TEST
    extern int sqlite3_search_count;
#endif
    assert( p->isTable );
    rc = sqlite3BtreeMovetoUnpacked(p->pCursor, 0, p->movetoTarget, 0, &res);
    if( rc ) return rc;
    p->lastRowid = keyToInt(p->movetoTarget);
    p->rowidIsValid = res==0 ?1:0;
    if( res<0 ){
      rc = sqlite3BtreeNext(p->pCursor, &res);
      if( rc ) return rc;
    }
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif
    p->deferredMoveto = 0;
................................................................................
** The returned structure should be closed by a call to
** sqlite3VdbeDeleteUnpackedRecord().
*/ 
SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack(
  KeyInfo *pKeyInfo,     /* Information about the record format */
  int nKey,              /* Size of the binary record */
  const void *pKey,      /* The binary record */
  UnpackedRecord *pSpace,/* Space available to hold resulting object */
  int szSpace            /* Size of pSpace[] in bytes */
){
  const unsigned char *aKey = (const unsigned char *)pKey;
  UnpackedRecord *p;

  int nByte, d;
  u32 idx;
  u16 u;                 /* Unsigned loop counter */
  u32 szHdr;
  Mem *pMem;

  
  assert( sizeof(Mem)>sizeof(*p) );








  nByte = sizeof(Mem)*(pKeyInfo->nField+2);
  if( nByte>szSpace ){
    p = sqlite3DbMallocRaw(pKeyInfo->db, nByte);
    if( p==0 ) return 0;
    p->flags = UNPACKED_NEED_FREE | UNPACKED_NEED_DESTROY;
  }else{
    p = pSpace;
    p->flags = UNPACKED_NEED_DESTROY;
  }
  p->pKeyInfo = pKeyInfo;
  p->nField = pKeyInfo->nField + 1;
  p->aMem = pMem = &((Mem*)p)[1];

  idx = getVarint32(aKey, szHdr);
  d = szHdr;
  u = 0;
  while( idx<szHdr && u<p->nField ){
    u32 serial_type;

    idx += getVarint32(&aKey[idx], serial_type);
................................................................................
                           i<nField ? pKeyInfo->aColl[i] : 0);
    if( rc!=0 ){
      break;
    }
    i++;
  }
  if( mem1.zMalloc ) sqlite3VdbeMemRelease(&mem1);













  if( rc==0 ){
    /* rc==0 here means that one of the keys ran out of fields and
    ** all the fields up to that point were equal. If the UNPACKED_INCRKEY
    ** flag is set, then break the tie by treating key2 as larger.
    ** If the UPACKED_PREFIX_MATCH flag is set, then keys with common prefixes
    ** are considered to be equal.  Otherwise, the longer key is the 
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains code use to implement APIs that are part of the
** VDBE.
**
** $Id: vdbeapi.c,v 1.156 2009/03/25 15:43:09 danielk1977 Exp $
*/

#if 0 && defined(SQLITE_ENABLE_MEMORY_MANAGEMENT)
/*
** The following structure contains pointers to the end points of a
** doubly-linked list of all compiled SQL statements that may be holding
** buffers eligible for release when the sqlite3_release_memory() interface is
................................................................................
}
SQLITE_API void sqlite3_result_zeroblob(sqlite3_context *pCtx, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetZeroBlob(&pCtx->s, n);
}
SQLITE_API void sqlite3_result_error_code(sqlite3_context *pCtx, int errCode){
  pCtx->isError = errCode;




}

/* Force an SQLITE_TOOBIG error. */
SQLITE_API void sqlite3_result_error_toobig(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE_TOOBIG;
  sqlite3VdbeMemSetStr(&pCtx->s, "string or blob too big", -1, 
................................................................................
  /* Assert that malloc() has not failed */
  db = p->db;
  if( db->mallocFailed ){
    return SQLITE_NOMEM;
  }

  if( p->pc<=0 && p->expired ){
    if( p->rc==SQLITE_OK ){
      p->rc = SQLITE_SCHEMA;
    }
    rc = SQLITE_ERROR;
    goto end_of_step;
  }
  if( sqlite3SafetyOn(db) ){
    p->rc = SQLITE_MISUSE;
................................................................................
    sqlite3_mutex_enter(db->mutex);
    while( (rc = sqlite3Step(v))==SQLITE_SCHEMA
           && cnt++ < 5
           && (rc = vdbeReprepare(v))==SQLITE_OK ){
      sqlite3_reset(pStmt);
      v->expired = 0;
    }
    if( rc==SQLITE_SCHEMA && v->isPrepareV2 && db->pErr ){
      /* This case occurs after failing to recompile an sql statement. 
      ** The error message from the SQL compiler has already been loaded 
      ** into the database handle. This block copies the error message 
      ** from the database handle into the statement and sets the statement
      ** program counter to 0 to ensure that when the statement is 
      ** finalized or reset the parser error message is available via
      ** sqlite3_errmsg() and sqlite3_errcode().
................................................................................
  sqlite3_context *context,  /* The function calling context */
  int NotUsed,               /* Number of arguments to the function */
  sqlite3_value **NotUsed2   /* Value of each argument */
){
  const char *zName = context->pFunc->zName;
  char *zErr;
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  zErr = sqlite3MPrintf(0,
      "unable to use function %s in the requested context", zName);
  sqlite3_result_error(context, zErr, -1);
  sqlite3_free(zErr);
}

/*
** Allocate or return the aggregate context for a user function.  A new
................................................................................
  if( pVm && pVm->pResultSet!=0 && i<pVm->nResColumn && i>=0 ){
    sqlite3_mutex_enter(pVm->db->mutex);
    vals = sqlite3_data_count(pStmt);
    pOut = &pVm->pResultSet[i];
  }else{
    /* ((double)0) In case of SQLITE_OMIT_FLOATING_POINT... */
    static const Mem nullMem = {{0}, (double)0, 0, "", 0, MEM_Null, SQLITE_NULL, 0, 0, 0 };
    if( pVm && pVm->db ){
      sqlite3_mutex_enter(pVm->db->mutex);
      sqlite3Error(pVm->db, SQLITE_RANGE, 0);
    }
    pOut = (Mem*)&nullMem;
  }
  return pOut;
}
................................................................................
  int N,
  const void *(*xFunc)(Mem*),
  int useType
){
  const void *ret = 0;
  Vdbe *p = (Vdbe *)pStmt;
  int n;

  

  if( p!=0 ){
    n = sqlite3_column_count(pStmt);
    if( N<n && N>=0 ){
      N += useType*n;
      sqlite3_mutex_enter(p->db->mutex);

      ret = xFunc(&p->aColName[N]);

      /* A malloc may have failed inside of the xFunc() call. If this
      ** is the case, clear the mallocFailed flag and return NULL.
      */
      if( p->db && p->db->mallocFailed ){
        p->db->mallocFailed = 0;
        ret = 0;
      }
      sqlite3_mutex_leave(p->db->mutex);
    }
  }
  return ret;
}

/*
** Return the name of the Nth column of the result set returned by SQL
** statement pStmt.
................................................................................
  void (*xDel)(void*)
){
  return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF16NATIVE);
}
#endif /* SQLITE_OMIT_UTF16 */
SQLITE_API int sqlite3_bind_value(sqlite3_stmt *pStmt, int i, const sqlite3_value *pValue){
  int rc;
  Vdbe *p = (Vdbe *)pStmt;
  rc = vdbeUnbind(p, i);
  if( rc==SQLITE_OK ){
    rc = sqlite3VdbeMemCopy(&p->aVar[i-1], pValue);





    if( rc==SQLITE_OK ){
      rc = sqlite3VdbeChangeEncoding(&p->aVar[i-1], ENC(p->db));




    }
    sqlite3_mutex_leave(p->db->mutex);

  }






  rc = sqlite3ApiExit(p->db, rc);



  return rc;
}
SQLITE_API int sqlite3_bind_zeroblob(sqlite3_stmt *pStmt, int i, int n){
  int rc;
  Vdbe *p = (Vdbe *)pStmt;
  rc = vdbeUnbind(p, i);
  if( rc==SQLITE_OK ){
................................................................................
/*
** Create a mapping from variable numbers to variable names
** in the Vdbe.azVar[] array, if such a mapping does not already
** exist.
*/
static void createVarMap(Vdbe *p){
  if( !p->okVar ){
    sqlite3_mutex_enter(p->db->mutex);
    if( !p->okVar ){
      int j;
      Op *pOp;






      for(j=0, pOp=p->aOp; j<p->nOp; j++, pOp++){
        if( pOp->opcode==OP_Variable ){
          assert( pOp->p1>0 && pOp->p1<=p->nVar );
          p->azVar[pOp->p1-1] = pOp->p4.z;
        }
      }
      p->okVar = 1;
    }
    sqlite3_mutex_leave(p->db->mutex);
  }
}

/*
** Return the name of a wildcard parameter.  Return NULL if the index
** is out of range or if the wildcard is unnamed.
................................................................................
    }
  }
  return 0;
}

/*
** Transfer all bindings from the first statement over to the second.
** If the two statements contain a different number of bindings, then
** an SQLITE_ERROR is returned.
*/
SQLITE_PRIVATE int sqlite3TransferBindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
  Vdbe *pFrom = (Vdbe*)pFromStmt;
  Vdbe *pTo = (Vdbe*)pToStmt;
  int i, rc = SQLITE_OK;
  if( (pFrom->magic!=VDBE_MAGIC_RUN && pFrom->magic!=VDBE_MAGIC_HALT)
    || (pTo->magic!=VDBE_MAGIC_RUN && pTo->magic!=VDBE_MAGIC_HALT)
    || pTo->db!=pFrom->db ){
    return SQLITE_MISUSE;
  }
  if( pFrom->nVar!=pTo->nVar ){
    return SQLITE_ERROR;
  }

  sqlite3_mutex_enter(pTo->db->mutex);
  for(i=0; rc==SQLITE_OK && i<pFrom->nVar; i++){
    sqlite3VdbeMemMove(&pTo->aVar[i], &pFrom->aVar[i]);
  }
  sqlite3_mutex_leave(pTo->db->mutex);
  assert( rc==SQLITE_OK || rc==SQLITE_NOMEM );
  return rc;
}

#ifndef SQLITE_OMIT_DEPRECATED
/*
** Deprecated external interface.  Internal/core SQLite code
** should call sqlite3TransferBindings.








*/
SQLITE_API int sqlite3_transfer_bindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){





  return sqlite3TransferBindings(pFromStmt, pToStmt);
}
#endif

/*
** Return the sqlite3* database handle to which the prepared statement given
** in the argument belongs.  This is the same database handle that was
................................................................................
**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.828 2009/03/23 17:11:27 danielk1977 Exp $
*/

/*
** The following global variable is incremented every time a cursor
** moves, either by the OP_SeekXX, OP_Next, or OP_Prev opcodes.  The test
** procedures use this information to make sure that indices are
** working correctly.  This variable has no function other than to
................................................................................
    fprintf(out, " NULL");
  }else if( (p->flags & (MEM_Int|MEM_Str))==(MEM_Int|MEM_Str) ){
    fprintf(out, " si:%lld", p->u.i);
  }else if( p->flags & MEM_Int ){
    fprintf(out, " i:%lld", p->u.i);
  }else if( p->flags & MEM_Real ){
    fprintf(out, " r:%g", p->r);


  }else{
    char zBuf[200];
    sqlite3VdbeMemPrettyPrint(p, zBuf);
    fprintf(out, " ");
    fprintf(out, "%s", zBuf);
  }
}
................................................................................
#ifdef VDBE_PROFILE
  u64 start;                 /* CPU clock count at start of opcode */
  int origPc;                /* Program counter at start of opcode */
#endif
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  int nProgressOps = 0;      /* Opcodes executed since progress callback. */
#endif
  UnpackedRecord aTempRec[16]; /* Space to hold a transient UnpackedRecord */



  assert( p->magic==VDBE_MAGIC_RUN );  /* sqlite3_step() verifies this */
  assert( db->magic==SQLITE_MAGIC_BUSY );
  sqlite3BtreeMutexArrayEnter(&p->aMutex);
  if( p->rc==SQLITE_NOMEM ){
    /* This happens if a malloc() inside a call to sqlite3_column_text() or
    ** sqlite3_column_text16() failed.  */
    goto no_mem;
  }
  assert( p->rc==SQLITE_OK || p->rc==SQLITE_BUSY );
  p->rc = SQLITE_OK;
................................................................................
** Store the number of entries (an integer value) in the table or index 
** opened by cursor P1 in register P2
*/
#ifndef SQLITE_OMIT_BTREECOUNT
case OP_Count: {         /* out2-prerelease */
  i64 nEntry;
  BtCursor *pCrsr = p->apCsr[pOp->p1]->pCursor;

  rc = sqlite3BtreeCount(pCrsr, &nEntry);



  pOut->flags = MEM_Int;
  pOut->u.i = nEntry;
  break;
}
#endif

/* Opcode: Statement P1 * * * *
................................................................................
        /* If there is no open transaction, then mark this as a special
        ** "transaction savepoint". */
        if( db->autoCommit ){
          db->autoCommit = 0;
          db->isTransactionSavepoint = 1;
        }else{
          db->nSavepoint++;
	}
    
        /* Link the new savepoint into the database handle's list. */
        pNew->pNext = db->pSavepoint;
        db->pSavepoint = pNew;
      }
    }
  }else{
................................................................................
    if( !alreadyExists ) pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IsUnique P1 P2 P3 P4 *
**
** The P3 register contains an integer record number.  Call this
** record number R.  The P4 register contains an index key created
** using MakeRecord.  Call it K.
**
** P1 is an index.  So it has no data and its key consists of a
** record generated by OP_MakeRecord where the last field is the 
** rowid of the entry that the index refers to.
** 
** This instruction asks if there is an entry in P1 where the
** fields matches K but the rowid is different from R.
** If there is no such entry, then there is an immediate
** jump to P2.  If any entry does exist where the index string
** matches K but the record number is not R, then the record
** number for that entry is written into P3 and control
** falls through to the next instruction.





**
** See also: NotFound, NotExists, Found
*/
case OP_IsUnique: {        /* jump, in3 */
  int i = pOp->p1;
  VdbeCursor *pCx;
  BtCursor *pCrsr;
  Mem *pK;
  i64 R;

  /* Pop the value R off the top of the stack
  */
  assert( pOp->p4type==P4_INT32 );
  assert( pOp->p4.i>0 && pOp->p4.i<=p->nMem );
  pK = &p->aMem[pOp->p4.i];
  sqlite3VdbeMemIntegerify(pIn3);
  R = pIn3->u.i;
  assert( i>=0 && i<p->nCursor );
  pCx = p->apCsr[i];
  assert( pCx!=0 );
  pCrsr = pCx->pCursor;
  if( pCrsr!=0 ){
    int res;
    i64 v;                     /* The record number that matches K */
    UnpackedRecord *pIdxKey;   /* Unpacked version of P4 */

    /* Make sure K is a string and make zKey point to K
    */
    assert( pK->flags & MEM_Blob );
    pIdxKey = sqlite3VdbeRecordUnpack(pCx->pKeyInfo, pK->n, pK->z,
                                      aTempRec, sizeof(aTempRec));
    if( pIdxKey==0 ){
      goto no_mem;
    }
    pIdxKey->flags |= UNPACKED_IGNORE_ROWID;

    /* Search for an entry in P1 where all but the last rowid match K
    ** If there is no such entry, jump immediately to P2.
    */


    assert( pCx->deferredMoveto==0 );

    pCx->cacheStatus = CACHE_STALE;
    rc = sqlite3BtreeMovetoUnpacked(pCrsr, pIdxKey, 0, 0, &res);
    if( rc!=SQLITE_OK ){
      sqlite3VdbeDeleteUnpackedRecord(pIdxKey);
      goto abort_due_to_error;

    }
    if( res<0 ){
      rc = sqlite3BtreeNext(pCrsr, &res);
      if( res ){




        pc = pOp->p2 - 1;
        sqlite3VdbeDeleteUnpackedRecord(pIdxKey);

        break;
      }
    }
    rc = sqlite3VdbeIdxKeyCompare(pCx, pIdxKey, &res); 
    sqlite3VdbeDeleteUnpackedRecord(pIdxKey);
    if( rc!=SQLITE_OK ) goto abort_due_to_error;
    if( res>0 ){
      pc = pOp->p2 - 1;
      break;

    }




    /* At this point, pCrsr is pointing to an entry in P1 where all but
    ** the final entry (the rowid) matches K.  Check to see if the
    ** final rowid column is different from R.  If it equals R then jump
    ** immediately to P2.
    */
    rc = sqlite3VdbeIdxRowid(pCrsr, &v);
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;





    }
    if( v==R ){









      pc = pOp->p2 - 1;
      break;


    }

    /* The final varint of the key is different from R.  Store it back
    ** into register R3.  (The record number of an entry that violates
    ** a UNIQUE constraint.)
    */
    pIn3->u.i = v;
    assert( pIn3->flags&MEM_Int );
  }
  break;
}

/* Opcode: NotExists P1 P2 P3 * *
**
** Use the content of register P3 as a integer key.  If a record 
................................................................................
  assert( p->apCsr[i]!=0 );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    int res = 0;
    u64 iKey;
    assert( pIn3->flags & MEM_Int );
    assert( p->apCsr[i]->isTable );
    iKey = intToKey(pIn3->u.i);
    rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0,&res);
    pC->lastRowid = pIn3->u.i;
    pC->rowidIsValid = res==0 ?1:0;
    pC->nullRow = 0;
    pC->cacheStatus = CACHE_STALE;

    if( res!=0 ){
      pc = pOp->p2 - 1;
      assert( pC->rowidIsValid==0 );
    }

  }else if( !pC->pseudoTable ){
    /* This happens when an attempt to open a read cursor on the 
    ** sqlite_master table returns SQLITE_EMPTY.
    */
    assert( pC->isTable );
    pc = pOp->p2 - 1;
    assert( pC->rowidIsValid==0 );

  }
  break;
}

/* Opcode: Sequence P1 P2 * * *
**
** Find the next available sequence number for cursor P1.
................................................................................
      memcpy(pC->pData, pData->z, pC->nData);
      pC->pData[pC->nData] = 0;
      pC->pData[pC->nData+1] = 0;
    }
    pC->nullRow = 0;
  }else{
    int nZero;

    if( pData->flags & MEM_Zero ){
      nZero = pData->u.nZero;
    }else{
      nZero = 0;
    }
    sqlite3BtreeSetCachedRowid(pC->pCursor, 0);
    rc = sqlite3BtreeInsert(pC->pCursor, 0, iKey,
                            pData->z, pData->n, nZero,
                            pOp->p5 & OPFLAG_APPEND);

  }
  
  pC->rowidIsValid = 0;
  pC->deferredMoveto = 0;
  pC->cacheStatus = CACHE_STALE;

  /* Invoke the update-hook if required. */
................................................................................
  break;
}

/* Opcode: Rowid P1 P2 * * *
**
** Store in register P2 an integer which is the key of the table entry that
** P1 is currently point to.




*/
case OP_Rowid: {                 /* out2-prerelease */
  int i = pOp->p1;
  VdbeCursor *pC;
  i64 v;

  assert( i>=0 && i<p->nCursor );
  pC = p->apCsr[i];
  assert( pC!=0 );






















  rc = sqlite3VdbeCursorMoveto(pC);
  if( rc ) goto abort_due_to_error;
  if( pC->rowidIsValid ){
    v = pC->lastRowid;
  }else if( pC->pseudoTable ){
    v = keyToInt(pC->iKey);
  }else if( pC->nullRow ){
    /* Leave the rowid set to a NULL */
    break;
  }else{
    assert( pC->pCursor!=0 );
    sqlite3BtreeKeySize(pC->pCursor, &v);
    v = keyToInt(v);

  }
  pOut->u.i = v;
  MemSetTypeFlag(pOut, MEM_Int);
  break;
}

/* Opcode: NullRow P1 * * * *
................................................................................
    sqlite3_search_count++;
#endif
  }
  pC->rowidIsValid = 0;
  break;
}

/* Opcode: IdxInsert P1 P2 P3 * *
**
** Register P2 holds a SQL index key made using the
** MakeRecord instructions.  This opcode writes that key
** into the index P1.  Data for the entry is nil.
**
** P3 is a flag that provides a hint to the b-tree layer that this
** insert is likely to be an append.
................................................................................
  assert( pIn2->flags & MEM_Blob );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    assert( pC->isTable==0 );
    rc = ExpandBlob(pIn2);
    if( rc==SQLITE_OK ){
      int nKey = pIn2->n;
      const char *zKey = pIn2->z;
      rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p3);


      assert( pC->deferredMoveto==0 );
      pC->cacheStatus = CACHE_STALE;
    }
  }
  break;
}

................................................................................
**
** See also: Rowid, MakeRecord.
*/
case OP_IdxRowid: {              /* out2-prerelease */
  int i = pOp->p1;
  BtCursor *pCrsr;
  VdbeCursor *pC;


  assert( i>=0 && i<p->nCursor );
  assert( p->apCsr[i]!=0 );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    i64 rowid;


    assert( pC->deferredMoveto==0 );
    assert( pC->isTable==0 );
    if( !pC->nullRow ){
      rc = sqlite3VdbeIdxRowid(pCrsr, &rowid);
      if( rc!=SQLITE_OK ){
        goto abort_due_to_error;
      }
................................................................................
    /* A value was pulled from the index */
    assert( pOp->p3>0 && pOp->p3<=p->nMem );
    sqlite3VdbeMemSetInt64(pOut, val);
  }
  break;
}






















































#ifndef SQLITE_OMIT_TRIGGER
/* Opcode: ContextPush * * * 
**
** Save the current Vdbe context such that it can be restored by a ContextPop
** opcode. The context stores the last insert row id, the last statement change
** count, and the current statement change count.
................................................................................
      pc = pOp->p2 - 1;
    }
  }
  pCur->nullRow = 0;

  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VRowid P1 P2 * * *
**
** Store into register P2  the rowid of
** the virtual-table that the P1 cursor is pointing to.
*/
case OP_VRowid: {             /* out2-prerelease */
  sqlite3_vtab *pVtab;
  const sqlite3_module *pModule;
  sqlite_int64 iRow;
  VdbeCursor *pCur = p->apCsr[pOp->p1];

  assert( pCur->pVtabCursor );
  if( pCur->nullRow ){
    break;
  }
  pVtab = pCur->pVtabCursor->pVtab;
  pModule = pVtab->pModule;
  assert( pModule->xRowid );
  if( sqlite3SafetyOff(db) ) goto abort_due_to_misuse;
  rc = pModule->xRowid(pCur->pVtabCursor, &iRow);
  sqlite3DbFree(db, p->zErrMsg);
  p->zErrMsg = pVtab->zErrMsg;
  pVtab->zErrMsg = 0;
  if( sqlite3SafetyOn(db) ) goto abort_due_to_misuse;
  MemSetTypeFlag(pOut, MEM_Int);
  pOut->u.i = iRow;
  break;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Opcode: VColumn P1 P2 P3 * *
**
** Store the value of the P2-th column of
** the row of the virtual-table that the 
................................................................................
**
*************************************************************************
**
** This file contains code use to implement an in-memory rollback journal.
** The in-memory rollback journal is used to journal transactions for
** ":memory:" databases and when the journal_mode=MEMORY pragma is used.
**
** @(#) $Id: memjournal.c,v 1.8 2008/12/20 02:14:40 drh Exp $
*/

/* Forward references to internal structures */
typedef struct MemJournal MemJournal;
typedef struct FilePoint FilePoint;
typedef struct FileChunk FileChunk;

/* Space to hold the rollback journal is allocated in increments of
** this many bytes.





*/
#define JOURNAL_CHUNKSIZE 1024

/* Macro to find the minimum of two numeric values.
*/
#ifndef MIN
# define MIN(x,y) ((x)<(y)?(x):(y))
#endif

................................................................................
  sqlite3_io_methods *pMethod;    /* Parent class. MUST BE FIRST */
  FileChunk *pFirst;              /* Head of in-memory chunk-list */
  FilePoint endpoint;             /* Pointer to the end of the file */
  FilePoint readpoint;            /* Pointer to the end of the last xRead() */
};

/*
** Read data from the file.

*/
static int memjrnlRead(
  sqlite3_file *pJfd,    /* The journal file from which to read */
  void *zBuf,            /* Put the results here */
  int iAmt,              /* Number of bytes to read */
  sqlite_int64 iOfst     /* Begin reading at this offset */
){
  MemJournal *p = (MemJournal *)pJfd;
  u8 *zOut = zBuf;
  int nRead = iAmt;
  int iChunkOffset;
  FileChunk *pChunk;


  assert( iOfst+iAmt<=p->endpoint.iOffset );

  if( p->readpoint.iOffset!=iOfst || iOfst==0 ){
    sqlite3_int64 iOff = 0;
    for(pChunk=p->pFirst; 
        pChunk && (iOff+JOURNAL_CHUNKSIZE)<=iOfst;
        pChunk=pChunk->pNext
    ){
      iOff += JOURNAL_CHUNKSIZE;
    }
  }else{
    pChunk = p->readpoint.pChunk;
  }
................................................................................
  MemJournal *p = (MemJournal *)pJfd;
  int nWrite = iAmt;
  u8 *zWrite = (u8 *)zBuf;

  /* An in-memory journal file should only ever be appended to. Random
  ** access writes are not required by sqlite.
  */
  assert(iOfst==p->endpoint.iOffset);
  UNUSED_PARAMETER(iOfst);

  while( nWrite>0 ){
    FileChunk *pChunk = p->endpoint.pChunk;
    int iChunkOffset = (int)(p->endpoint.iOffset%JOURNAL_CHUNKSIZE);
    int iSpace = MIN(nWrite, JOURNAL_CHUNKSIZE - iChunkOffset);

................................................................................
  memjrnlTruncate(pJfd, 0);
  return SQLITE_OK;
}


/*
** Sync the file.





*/
static int memjrnlSync(sqlite3_file *NotUsed, int NotUsed2){
  UNUSED_PARAMETER2(NotUsed, NotUsed2);

  return SQLITE_OK;
}


/*
** Query the size of the file in bytes.
*/
static int memjrnlFileSize(sqlite3_file *pJfd, sqlite_int64 *pSize){
  MemJournal *p = (MemJournal *)pJfd;
  *pSize = (sqlite_int64) p->endpoint.iOffset;
................................................................................
};

/* 
** Open a journal file.
*/
SQLITE_PRIVATE void sqlite3MemJournalOpen(sqlite3_file *pJfd){
  MemJournal *p = (MemJournal *)pJfd;

  memset(p, 0, sqlite3MemJournalSize());
  p->pMethod = &MemJournalMethods;
}

/*
** Return true if the file-handle passed as an argument is 
** an in-memory journal 
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for walking the parser tree for
** an SQL statement.
**
** $Id: walker.c,v 1.2 2009/02/19 14:39:25 danielk1977 Exp $
*/


/*
** Walk an expression tree.  Invoke the callback once for each node
** of the expression, while decending.  (In other words, the callback
** is invoked before visiting children.)
................................................................................
**
** The return value from this routine is WRC_Abort to abandon the tree walk
** and WRC_Continue to continue.
*/
SQLITE_PRIVATE int sqlite3WalkExpr(Walker *pWalker, Expr *pExpr){
  int rc;
  if( pExpr==0 ) return WRC_Continue;



  rc = pWalker->xExprCallback(pWalker, pExpr);
  if( rc==WRC_Continue ){

    if( sqlite3WalkExpr(pWalker, pExpr->pLeft) ) return WRC_Abort;
    if( sqlite3WalkExpr(pWalker, pExpr->pRight) ) return WRC_Abort;
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
    }else{
      if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
    }
................................................................................
**
*************************************************************************
**
** This file contains routines used for walking the parser tree and
** resolve all identifiers by associating them with a particular
** table and column.
**
** $Id: resolve.c,v 1.20 2009/03/05 04:23:47 shane Exp $
*/

/*
** Turn the pExpr expression into an alias for the iCol-th column of the
** result set in pEList.
**
** If the result set column is a simple column reference, then this routine
................................................................................
          if( sqlite3StrICmp(pCol->zName, zCol)==0 ){
            cnt++;
            pExpr->iColumn = iCol==pTab->iPKey ? -1 : iCol;
            pExpr->pTab = pTab;
            if( iCol>=0 ){
              testcase( iCol==31 );
              testcase( iCol==32 );



              *piColMask |= ((u32)1<<iCol) | (iCol>=32?0xffffffff:0);

            }
            break;
          }
        }
      }
    }
#endif /* !defined(SQLITE_OMIT_TRIGGER) */
................................................................................
  ** Z is a string literal if it doesn't match any column names.  In that
  ** case, we need to return right away and not make any changes to
  ** pExpr.
  **
  ** Because no reference was made to outer contexts, the pNC->nRef
  ** fields are not changed in any context.
  */
  if( cnt==0 && zTab==0 && pColumnToken->z[0]=='"' ){
    sqlite3DbFree(db, zCol);
    pExpr->op = TK_STRING;
    pExpr->pTab = 0;
    return 0;
  }

  /*
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.424 2009/03/25 16:51:43 drh Exp $
*/

/*
** Return the 'affinity' of the expression pExpr if any.
**
** If pExpr is a column, a reference to a column via an 'AS' alias,
** or a sub-select with a column as the return value, then the 
................................................................................
  pNew->pRight = pRight;
  pNew->iAgg = -1;
  pNew->span.z = (u8*)"";
  if( pToken ){
    int c;
    assert( pToken->dyn==0 );
    pNew->span = *pToken;
 
    /* The pToken->z value is read-only.  But the new expression
    ** node created here might be passed to sqlite3DequoteExpr() which
    ** will attempt to modify pNew->token.z.  Hence, if the token
    ** is quoted, make a copy now so that DequoteExpr() will change
    ** the copy rather than the original text.
    */
    if( pToken->n>=2 
         && ((c = pToken->z[0])=='\'' || c=='"' || c=='[' || c=='`') ){
      sqlite3TokenCopy(db, &pNew->token, pToken);





    }else{
      pNew->token = *pToken;
      pNew->flags |= EP_Dequoted;
      VVA_ONLY( pNew->vvaFlags |= EVVA_ReadOnlyToken; )
    }

  }else if( pLeft ){
    if( pRight ){
      if( pRight->span.dyn==0 && pLeft->span.dyn==0 ){
        sqlite3ExprSpan(pNew, &pLeft->span, &pRight->span);
      }
      if( pRight->flags & EP_ExpCollate ){
        pNew->flags |= EP_ExpCollate;
................................................................................

/*
** Clear an expression structure without deleting the structure itself.
** Substructure is deleted.
*/
SQLITE_PRIVATE void sqlite3ExprClear(sqlite3 *db, Expr *p){
  if( p->token.dyn ) sqlite3DbFree(db, (char*)p->token.z);
  if( !ExprHasAnyProperty(p, EP_TokenOnly|EP_SpanOnly) ){
    if( p->span.dyn ) sqlite3DbFree(db, (char*)p->span.z);
    if( ExprHasProperty(p, EP_Reduced) ){

      if( p->pLeft ) sqlite3ExprClear(db, p->pLeft);
      if( p->pRight ) sqlite3ExprClear(db, p->pRight);
    }else{

      sqlite3ExprDelete(db, p->pLeft);
      sqlite3ExprDelete(db, p->pRight);
    }

    if( ExprHasProperty(p, EP_xIsSelect) ){
      sqlite3SelectDelete(db, p->x.pSelect);
    }else{
      sqlite3ExprListDelete(db, p->x.pList);
    }
  }
}
................................................................................
*/
SQLITE_PRIVATE void sqlite3ExprDelete(sqlite3 *db, Expr *p){
  if( p==0 ) return;
  sqlite3ExprClear(db, p);
  sqlite3DbFree(db, p);
}

/*
** The Expr.token field might be a string literal that is quoted.
** If so, remove the quotation marks.
*/
SQLITE_PRIVATE void sqlite3DequoteExpr(Expr *p){
  if( !ExprHasAnyProperty(p, EP_Dequoted) ){
    ExprSetProperty(p, EP_Dequoted);
    assert( (p->vvaFlags & EVVA_ReadOnlyToken)==0 );
    sqlite3Dequote((char*)p->token.z);
  }
}

/*
** Return the number of bytes allocated for the expression structure 
** passed as the first argument. This is always one of EXPR_FULLSIZE,
** EXPR_REDUCEDSIZE or EXPR_TOKENONLYSIZE.
*/
static int exprStructSize(Expr *p){
  if( ExprHasProperty(p, EP_TokenOnly) ) return EXPR_TOKENONLYSIZE;
  if( ExprHasProperty(p, EP_SpanOnly) ) return EXPR_SPANONLYSIZE;
  if( ExprHasProperty(p, EP_Reduced) ) return EXPR_REDUCEDSIZE;
  return EXPR_FULLSIZE;
}

/*
** sqlite3ExprDup() has been called to create a copy of expression p with
** the EXPRDUP_XXX flags passed as the second argument. This function 
................................................................................
*/
static int dupedExprStructSize(Expr *p, int flags){
  int nSize;
  if( 0==(flags&EXPRDUP_REDUCE) ){
    nSize = EXPR_FULLSIZE;
  }else if( p->pLeft || p->pRight || p->pColl || p->x.pList ){
    nSize = EXPR_REDUCEDSIZE;
  }else if( flags&(EXPRDUP_SPAN|EXPRDUP_DISTINCTSPAN) ){
    nSize = EXPR_SPANONLYSIZE;
  }else{
    nSize = EXPR_TOKENONLYSIZE;
  }
  return nSize;
}

/*
................................................................................
** the EXPRDUP_XXX passed as the second argument. This function returns
** the space in bytes required to store the copy of the Expr structure
** and the copies of the Expr.token.z and Expr.span.z (if applicable)
** string buffers.
*/
static int dupedExprNodeSize(Expr *p, int flags){
  int nByte = dupedExprStructSize(p, flags) + (p->token.z ? p->token.n + 1 : 0);
  if( (flags&EXPRDUP_DISTINCTSPAN)
   || (flags&EXPRDUP_SPAN && (p->token.z!=p->span.z || p->token.n!=p->span.n)) 
  ){
    nByte += p->span.n;
  }
  return ROUND8(nByte);
}

/*
................................................................................
** descended from the Expr.x.pList or Expr.x.pSelect variables).
*/
static int dupedExprSize(Expr *p, int flags){
  int nByte = 0;
  if( p ){
    nByte = dupedExprNodeSize(p, flags);
    if( flags&EXPRDUP_REDUCE ){
      int f = flags&(~(EXPRDUP_SPAN|EXPRDUP_DISTINCTSPAN));
      nByte += dupedExprSize(p->pLeft, f) + dupedExprSize(p->pRight, f);
    }
  }
  return nByte;
}

/*
................................................................................
** (if applicable), and the copies of the p->pLeft and p->pRight expressions,
** if any. Before returning, *pzBuffer is set to the first byte passed the
** portion of the buffer copied into by this function.
*/
static Expr *exprDup(sqlite3 *db, Expr *p, int flags, u8 **pzBuffer){
  Expr *pNew = 0;                      /* Value to return */
  if( p ){
    const int isRequireDistinctSpan = (flags&EXPRDUP_DISTINCTSPAN);
    const int isRequireSpan = (flags&(EXPRDUP_SPAN|EXPRDUP_DISTINCTSPAN));
    const int isReduced = (flags&EXPRDUP_REDUCE);
    u8 *zAlloc;

    assert( pzBuffer==0 || isReduced );

    /* Figure out where to write the new Expr structure. */
    if( pzBuffer ){
................................................................................
      }else{
        int nSize = exprStructSize(p);
        memcpy(zAlloc, p, nSize);
        memset(&zAlloc[nSize], 0, EXPR_FULLSIZE-nSize);
      }

      /* Set the EP_Reduced and EP_TokenOnly flags appropriately. */
      pNew->flags &= ~(EP_Reduced|EP_TokenOnly|EP_SpanOnly);
      switch( nNewSize ){
        case EXPR_REDUCEDSIZE:   pNew->flags |= EP_Reduced; break;
        case EXPR_TOKENONLYSIZE: pNew->flags |= EP_TokenOnly; break;
        case EXPR_SPANONLYSIZE:  pNew->flags |= EP_SpanOnly; break;
      }

      /* Copy the p->token string, if any. */
      if( nToken ){
        unsigned char *zToken = &zAlloc[nNewSize];
        memcpy(zToken, p->token.z, nToken-1);
        zToken[nToken-1] = '\0';
................................................................................
        pNew->token.dyn = 0;
        pNew->token.z = zToken;
      }

      if( 0==((p->flags|pNew->flags) & EP_TokenOnly) ){
        /* Fill in the pNew->span token, if required. */
        if( isRequireSpan ){
          if( isRequireDistinctSpan 
           || p->token.z!=p->span.z || p->token.n!=p->span.n
          ){
            pNew->span.z = &zAlloc[nNewSize+nToken];
            memcpy((char *)pNew->span.z, p->span.z, p->span.n);
            pNew->span.dyn = 0;
          }else{
            pNew->span.z = pNew->token.z;
            pNew->span.n = pNew->token.n;
          }
        }else{
          pNew->span.z = 0;
          pNew->span.n = 0;
        }
      }

      if( 0==((p->flags|pNew->flags) & (EP_TokenOnly|EP_SpanOnly)) ){
        /* Fill in the pNew->x.pSelect or pNew->x.pList member. */
        if( ExprHasProperty(p, EP_xIsSelect) ){
          pNew->x.pSelect = sqlite3SelectDup(db, p->x.pSelect, isReduced);
        }else{
          pNew->x.pList = sqlite3ExprListDup(db, p->x.pList, isReduced);
        }
      }

      /* Fill in pNew->pLeft and pNew->pRight. */
      if( ExprHasAnyProperty(pNew, EP_Reduced|EP_TokenOnly|EP_SpanOnly) ){
        zAlloc += dupedExprNodeSize(p, flags);
        if( ExprHasProperty(pNew, EP_Reduced) ){
          pNew->pLeft = exprDup(db, p->pLeft, EXPRDUP_REDUCE, &zAlloc);
          pNew->pRight = exprDup(db, p->pRight, EXPRDUP_REDUCE, &zAlloc);
        }
        if( pzBuffer ){
          *pzBuffer = zAlloc;
        }
      }else if( !ExprHasAnyProperty(p, EP_TokenOnly|EP_SpanOnly) ){
        pNew->pLeft = sqlite3ExprDup(db, p->pLeft, 0);
        pNew->pRight = sqlite3ExprDup(db, p->pRight, 0);
      }
    }
  }
  return pNew;
}
................................................................................
  **     SELECT <column> FROM <table>
  **
  ** If this is the case, it may be possible to use an existing table
  ** or index instead of generating an epheremal table.
  */
  p = (ExprHasProperty(pX, EP_xIsSelect) ? pX->x.pSelect : 0);
  if( isCandidateForInOpt(p) ){
    sqlite3 *db = pParse->db;
    Index *pIdx;
    Expr *pExpr = p->pEList->a[0].pExpr;
    int iCol = pExpr->iColumn;
    Vdbe *v = sqlite3GetVdbe(pParse);








    /* This function is only called from two places. In both cases the vdbe
    ** has already been allocated. So assume sqlite3GetVdbe() is always
    ** successful here.
    */
    assert(v);
    if( iCol<0 ){
      int iMem = ++pParse->nMem;
      int iAddr;
      Table *pTab = p->pSrc->a[0].pTab;
      int iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
      sqlite3VdbeUsesBtree(v, iDb);

      iAddr = sqlite3VdbeAddOp1(v, OP_If, iMem);
      sqlite3VdbeAddOp2(v, OP_Integer, 1, iMem);

      sqlite3OpenTable(pParse, iTab, iDb, pTab, OP_OpenRead);
      eType = IN_INDEX_ROWID;

      sqlite3VdbeJumpHere(v, iAddr);
    }else{


      /* The collation sequence used by the comparison. If an index is to 
      ** be used in place of a temp-table, it must be ordered according
      ** to this collation sequence.
      */
      CollSeq *pReq = sqlite3BinaryCompareCollSeq(pParse, pX->pLeft, pExpr);

      /* Check that the affinity that will be used to perform the 
      ** comparison is the same as the affinity of the column. If
      ** it is not, it is not possible to use any index.
      */
      Table *pTab = p->pSrc->a[0].pTab;
      char aff = comparisonAffinity(pX);
      int affinity_ok = (pTab->aCol[iCol].affinity==aff||aff==SQLITE_AFF_NONE);

      for(pIdx=pTab->pIndex; pIdx && eType==0 && affinity_ok; pIdx=pIdx->pNext){
        if( (pIdx->aiColumn[0]==iCol)
         && (pReq==sqlite3FindCollSeq(db, ENC(db), pIdx->azColl[0], -1, 0))
         && (!mustBeUnique || (pIdx->nColumn==1 && pIdx->onError!=OE_None))
        ){
          int iDb;
          int iMem = ++pParse->nMem;
          int iAddr;
          char *pKey;
  
          pKey = (char *)sqlite3IndexKeyinfo(pParse, pIdx);
          iDb = sqlite3SchemaToIndex(db, pIdx->pSchema);
          sqlite3VdbeUsesBtree(v, iDb);
................................................................................
  Expr *pExpr, 
  int rMayHaveNull,
  int isRowid
){
  int testAddr = 0;                       /* One-time test address */
  Vdbe *v = sqlite3GetVdbe(pParse);
  if( v==0 ) return;


  /* This code must be run in its entirety every time it is encountered
  ** if any of the following is true:
  **
  **    *  The right-hand side is a correlated subquery
  **    *  The right-hand side is an expression list containing variables
  **    *  We are inside a trigger
................................................................................
          */
          if( testAddr && !sqlite3ExprIsConstant(pE2) ){
            sqlite3VdbeChangeToNoop(v, testAddr-1, 2);
            testAddr = 0;
          }

          /* Evaluate the expression and insert it into the temp table */
          pParse->disableColCache++;
          r3 = sqlite3ExprCodeTarget(pParse, pE2, r1);
          assert( pParse->disableColCache>0 );
          pParse->disableColCache--;

          if( isRowid ){
            sqlite3VdbeAddOp2(v, OP_MustBeInt, r3, sqlite3VdbeCurrentAddr(v)+2);
            sqlite3VdbeAddOp3(v, OP_Insert, pExpr->iTable, r2, r3);
          }else{
            sqlite3VdbeAddOp4(v, OP_MakeRecord, r3, 1, r2, &affinity, 1);
            sqlite3ExprCacheAffinityChange(pParse, r3, 1);
            sqlite3VdbeAddOp2(v, OP_IdxInsert, pExpr->iTable, r2);
................................................................................

    case TK_EXISTS:
    case TK_SELECT: {
      /* This has to be a scalar SELECT.  Generate code to put the
      ** value of this select in a memory cell and record the number
      ** of the memory cell in iColumn.
      */
      static const Token one = { (u8*)"1", 0, 1 };
      Select *pSel;
      SelectDest dest;

      assert( ExprHasProperty(pExpr, EP_xIsSelect) );
      pSel = pExpr->x.pSelect;
      sqlite3SelectDestInit(&dest, 0, ++pParse->nMem);
      if( pExpr->op==TK_SELECT ){
................................................................................
      break;
    }
  }

  if( testAddr ){
    sqlite3VdbeJumpHere(v, testAddr-1);
  }


  return;
}
#endif /* SQLITE_OMIT_SUBQUERY */

/*
** Duplicate an 8-byte value
................................................................................
      sqlite3VdbeAddOp4(v, OP_Int64, 0, iMem, 0, zV, P4_INT64);
    }else{
      codeReal(v, z, n, negFlag, iMem);
    }
  }
}




















































































































/*
** Generate code that will extract the iColumn-th column from
** table pTab and store the column value in a register.  An effort
** is made to store the column value in register iReg, but this is
** not guaranteed.  The location of the column value is returned.
**
................................................................................
  int iReg,        /* Store results here */
  int allowAffChng /* True if prior affinity changes are OK */
){
  Vdbe *v = pParse->pVdbe;
  int i;
  struct yColCache *p;

  for(i=0, p=pParse->aColCache; i<pParse->nColCache; i++, p++){
    if( p->iTable==iTable && p->iColumn==iColumn
           && (!p->affChange || allowAffChng) ){
#if 0
      sqlite3VdbeAddOp0(v, OP_Noop);
      VdbeComment((v, "OPT: tab%d.col%d -> r%d", iTable, iColumn, p->iReg));
#endif


      return p->iReg;
    }
  }  
  assert( v!=0 );
  if( iColumn<0 ){
    int op = (pTab && IsVirtual(pTab)) ? OP_VRowid : OP_Rowid;
    sqlite3VdbeAddOp2(v, op, iTable, iReg);
  }else if( pTab==0 ){
    sqlite3VdbeAddOp3(v, OP_Column, iTable, iColumn, iReg);
  }else{
    int op = IsVirtual(pTab) ? OP_VColumn : OP_Column;
    sqlite3VdbeAddOp3(v, op, iTable, iColumn, iReg);
    sqlite3ColumnDefault(v, pTab, iColumn);
#ifndef SQLITE_OMIT_FLOATING_POINT
    if( pTab->aCol[iColumn].affinity==SQLITE_AFF_REAL ){
      sqlite3VdbeAddOp1(v, OP_RealAffinity, iReg);
    }
#endif
  }
  if( pParse->disableColCache==0 ){
    i = pParse->iColCache;
    p = &pParse->aColCache[i];
    p->iTable = iTable;
    p->iColumn = iColumn;
    p->iReg = iReg;
    p->affChange = 0;
    i++;
    if( i>=ArraySize(pParse->aColCache) ) i = 0;
    if( i>pParse->nColCache ) pParse->nColCache = i;
    pParse->iColCache = i;
  }
  return iReg;
}

/*
** Clear all column cache entries associated with the vdbe
** cursor with cursor number iTable.
*/
SQLITE_PRIVATE void sqlite3ExprClearColumnCache(Parse *pParse, int iTable){
  if( iTable<0 ){
    pParse->nColCache = 0;
    pParse->iColCache = 0;
  }else{
    int i;
    for(i=0; i<pParse->nColCache; i++){
      if( pParse->aColCache[i].iTable==iTable ){
        testcase( i==pParse->nColCache-1 );
        pParse->aColCache[i] = pParse->aColCache[--pParse->nColCache];
        pParse->iColCache = pParse->nColCache;

      }




    }
  }
}

/*
** Record the fact that an affinity change has occurred on iCount
** registers starting with iStart.
*/
SQLITE_PRIVATE void sqlite3ExprCacheAffinityChange(Parse *pParse, int iStart, int iCount){
  int iEnd = iStart + iCount - 1;
  int i;
  for(i=0; i<pParse->nColCache; i++){
    int r = pParse->aColCache[i].iReg;

    if( r>=iStart && r<=iEnd ){
      pParse->aColCache[i].affChange = 1;
    }
  }
}

/*
** Generate code to move content from registers iFrom...iFrom+nReg-1
** over to iTo..iTo+nReg-1. Keep the column cache up-to-date.
*/
SQLITE_PRIVATE void sqlite3ExprCodeMove(Parse *pParse, int iFrom, int iTo, int nReg){
  int i;

  if( iFrom==iTo ) return;
  sqlite3VdbeAddOp3(pParse->pVdbe, OP_Move, iFrom, iTo, nReg);
  for(i=0; i<pParse->nColCache; i++){
    int x = pParse->aColCache[i].iReg;

    if( x>=iFrom && x<iFrom+nReg ){
      pParse->aColCache[i].iReg += iTo-iFrom;
    }
  }
}

/*
** Generate code to copy content from registers iFrom...iFrom+nReg-1
** over to iTo..iTo+nReg-1.
................................................................................

/*
** Return true if any register in the range iFrom..iTo (inclusive)
** is used as part of the column cache.
*/
static int usedAsColumnCache(Parse *pParse, int iFrom, int iTo){
  int i;
  for(i=0; i<pParse->nColCache; i++){
    int r = pParse->aColCache[i].iReg;

    if( r>=iFrom && r<=iTo ) return 1;
  }
  return 0;
}

/*
** There is a value in register iReg.
**
** We are going to modify the value, so we need to make sure it
** is not a cached register.  If iReg is a cached register,
** then clear the corresponding cache line.
*/
SQLITE_PRIVATE void sqlite3ExprWritableRegister(Parse *pParse, int iReg){
  int i;
  if( usedAsColumnCache(pParse, iReg, iReg) ){
    for(i=0; i<pParse->nColCache; i++){
      if( pParse->aColCache[i].iReg==iReg ){
        pParse->aColCache[i] = pParse->aColCache[--pParse->nColCache];
        pParse->iColCache = pParse->nColCache;
      }
    }
  }
}

/*
** If the last instruction coded is an ephemeral copy of any of
** the registers in the nReg registers beginning with iReg, then
** convert the last instruction from OP_SCopy to OP_Copy.
*/
SQLITE_PRIVATE void sqlite3ExprHardCopy(Parse *pParse, int iReg, int nReg){
  int addr;
................................................................................
** of 1 to pParse->nAlias inclusive.  
**
** pParse->aAlias[iAlias-1] records the register number where the value
** of the iAlias-th alias is stored.  If zero, that means that the
** alias has not yet been computed.
*/
static int codeAlias(Parse *pParse, int iAlias, Expr *pExpr, int target){

  sqlite3 *db = pParse->db;
  int iReg;
  if( pParse->nAliasAlloc<pParse->nAlias ){
    pParse->aAlias = sqlite3DbReallocOrFree(db, pParse->aAlias,
                                 sizeof(pParse->aAlias[0])*pParse->nAlias );
    testcase( db->mallocFailed && pParse->nAliasAlloc>0 );
    if( db->mallocFailed ) return 0;
................................................................................
    memset(&pParse->aAlias[pParse->nAliasAlloc], 0,
           (pParse->nAlias-pParse->nAliasAlloc)*sizeof(pParse->aAlias[0]));
    pParse->nAliasAlloc = pParse->nAlias;
  }
  assert( iAlias>0 && iAlias<=pParse->nAlias );
  iReg = pParse->aAlias[iAlias-1];
  if( iReg==0 ){
    if( pParse->disableColCache ){
      iReg = sqlite3ExprCodeTarget(pParse, pExpr, target);
    }else{
      iReg = ++pParse->nMem;
      sqlite3ExprCode(pParse, pExpr, iReg);
      pParse->aAlias[iAlias-1] = iReg;
    }
  }
  return iReg;



}

/*
** Generate code into the current Vdbe to evaluate the given
** expression.  Attempt to store the results in register "target".
** Return the register where results are stored.
**
................................................................................
      break;
    }
    case TK_FLOAT: {
      codeReal(v, (char*)pExpr->token.z, pExpr->token.n, 0, target);
      break;
    }
    case TK_STRING: {
      sqlite3DequoteExpr(pExpr);
      sqlite3VdbeAddOp4(v,OP_String8, 0, target, 0,
                        (char*)pExpr->token.z, pExpr->token.n);
      break;
    }
    case TK_NULL: {
      sqlite3VdbeAddOp2(v, OP_Null, 0, target);
      break;
    }
................................................................................
      }else{
        inReg = pInfo->aFunc[pExpr->iAgg].iMem;
      }
      break;
    }
    case TK_CONST_FUNC:
    case TK_FUNCTION: {
      ExprList *pList = (
        ExprHasAnyProperty(pExpr, EP_TokenOnly|EP_SpanOnly) ? 0 : pExpr->x.pList
      );
      int nExpr = pList ? pList->nExpr : 0;
      FuncDef *pDef;
      int nId;

      const char *zId;
      int constMask = 0;
      int i;

      u8 enc = ENC(db);
      CollSeq *pColl = 0;

      assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
      testcase( op==TK_CONST_FUNC );
      testcase( op==TK_FUNCTION );






      zId = (char*)pExpr->token.z;
      nId = pExpr->token.n;
      pDef = sqlite3FindFunction(db, zId, nId, nExpr, enc, 0);
      assert( pDef!=0 );
      if( pList ){
        nExpr = pList->nExpr;
        r1 = sqlite3GetTempRange(pParse, nExpr);
        sqlite3ExprCodeExprList(pParse, pList, r1, 1);
      }else{
        nExpr = r1 = 0;
      }
#ifndef SQLITE_OMIT_VIRTUALTABLE
      /* Possibly overload the function if the first argument is
      ** a virtual table column.
      **
      ** For infix functions (LIKE, GLOB, REGEXP, and MATCH) use the
      ** second argument, not the first, as the argument to test to
................................................................................
      ** see if it is a column in a virtual table.  This is done because
      ** the left operand of infix functions (the operand we want to
      ** control overloading) ends up as the second argument to the
      ** function.  The expression "A glob B" is equivalent to 
      ** "glob(B,A).  We want to use the A in "A glob B" to test
      ** for function overloading.  But we use the B term in "glob(B,A)".
      */
      if( nExpr>=2 && (pExpr->flags & EP_InfixFunc) ){
        pDef = sqlite3VtabOverloadFunction(db, pDef, nExpr, pList->a[1].pExpr);
      }else if( nExpr>0 ){
        pDef = sqlite3VtabOverloadFunction(db, pDef, nExpr, pList->a[0].pExpr);
      }
#endif
      for(i=0; i<nExpr && i<32; i++){
        if( sqlite3ExprIsConstant(pList->a[i].pExpr) ){
          constMask |= (1<<i);
        }
        if( (pDef->flags & SQLITE_FUNC_NEEDCOLL)!=0 && !pColl ){
          pColl = sqlite3ExprCollSeq(pParse, pList->a[i].pExpr);
        }
      }
      if( pDef->flags & SQLITE_FUNC_NEEDCOLL ){
        if( !pColl ) pColl = db->pDfltColl; 
        sqlite3VdbeAddOp4(v, OP_CollSeq, 0, 0, 0, (char *)pColl, P4_COLLSEQ);
      }
      sqlite3VdbeAddOp4(v, OP_Function, constMask, r1, target,
                        (char*)pDef, P4_FUNCDEF);
      sqlite3VdbeChangeP5(v, (u8)nExpr);
      if( nExpr ){
        sqlite3ReleaseTempRange(pParse, r1, nExpr);
      }
      sqlite3ExprCacheAffinityChange(pParse, r1, nExpr);
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY
    case TK_EXISTS:
    case TK_SELECT: {
      testcase( op==TK_EXISTS );
      testcase( op==TK_SELECT );
................................................................................
      */
      affinity = comparisonAffinity(pExpr);


      /* Code the <expr> from "<expr> IN (...)". The temporary table
      ** pExpr->iTable contains the values that make up the (...) set.
      */
      pParse->disableColCache++;
      sqlite3ExprCode(pParse, pExpr->pLeft, target);
      pParse->disableColCache--;
      j2 = sqlite3VdbeAddOp1(v, OP_IsNull, target);
      if( eType==IN_INDEX_ROWID ){
        j3 = sqlite3VdbeAddOp1(v, OP_MustBeInt, target);
        j4 = sqlite3VdbeAddOp3(v, OP_NotExists, pExpr->iTable, 0, target);
        sqlite3VdbeAddOp2(v, OP_Integer, 1, target);
        j5 = sqlite3VdbeAddOp0(v, OP_Goto);
        sqlite3VdbeJumpHere(v, j3);
................................................................................
          ** expression.
          */
          sqlite3VdbeAddOp2(v, OP_Copy, rNotFound, target);
        }
      }
      sqlite3VdbeJumpHere(v, j2);
      sqlite3VdbeJumpHere(v, j5);

      VdbeComment((v, "end IN expr r%d", target));
      break;
    }
#endif
    /*
    **    x BETWEEN y AND z
    **
................................................................................
      int i;                            /* Loop counter */
      ExprList *pEList;                 /* List of WHEN terms */
      struct ExprList_item *aListelem;  /* Array of WHEN terms */
      Expr opCompare;                   /* The X==Ei expression */
      Expr cacheX;                      /* Cached expression X */
      Expr *pX;                         /* The X expression */
      Expr *pTest = 0;                  /* X==Ei (form A) or just Ei (form B) */


      assert( !ExprHasProperty(pExpr, EP_xIsSelect) && pExpr->x.pList );
      assert((pExpr->x.pList->nExpr % 2) == 0);
      assert(pExpr->x.pList->nExpr > 0);
      pEList = pExpr->x.pList;
      aListelem = pEList->a;
      nExpr = pEList->nExpr;
................................................................................
        cacheX.iTable = sqlite3ExprCodeTemp(pParse, pX, &regFree1);
        testcase( regFree1==0 );
        cacheX.op = TK_REGISTER;
        opCompare.op = TK_EQ;
        opCompare.pLeft = &cacheX;
        pTest = &opCompare;
      }
      pParse->disableColCache++;
      for(i=0; i<nExpr; i=i+2){

        if( pX ){
          assert( pTest!=0 );
          opCompare.pRight = aListelem[i].pExpr;
        }else{
          pTest = aListelem[i].pExpr;
        }
        nextCase = sqlite3VdbeMakeLabel(v);
        testcase( pTest->op==TK_COLUMN || pTest->op==TK_REGISTER );
        sqlite3ExprIfFalse(pParse, pTest, nextCase, SQLITE_JUMPIFNULL);
        testcase( aListelem[i+1].pExpr->op==TK_COLUMN );
        testcase( aListelem[i+1].pExpr->op==TK_REGISTER );
        sqlite3ExprCode(pParse, aListelem[i+1].pExpr, target);
        sqlite3VdbeAddOp2(v, OP_Goto, 0, endLabel);

        sqlite3VdbeResolveLabel(v, nextCase);
      }
      if( pExpr->pRight ){

        sqlite3ExprCode(pParse, pExpr->pRight, target);

      }else{
        sqlite3VdbeAddOp2(v, OP_Null, 0, target);
      }


      sqlite3VdbeResolveLabel(v, endLabel);
      assert( pParse->disableColCache>0 );
      pParse->disableColCache--;
      break;
    }
#ifndef SQLITE_OMIT_TRIGGER
    case TK_RAISE: {
      if( !pParse->trigStack ){
        sqlite3ErrorMsg(pParse,
                       "RAISE() may only be used within a trigger-program");
        return 0;
      }
      if( pExpr->affinity!=OE_Ignore ){
         assert( pExpr->affinity==OE_Rollback ||
                 pExpr->affinity == OE_Abort ||
                 pExpr->affinity == OE_Fail );
         sqlite3DequoteExpr(pExpr);
         sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, pExpr->affinity, 0,
                        (char*)pExpr->token.z, pExpr->token.n);
      } else {
         assert( pExpr->affinity == OE_Ignore );
         sqlite3VdbeAddOp2(v, OP_ContextPop, 0, 0);
         sqlite3VdbeAddOp2(v, OP_Goto, 0, pParse->trigStack->ignoreJump);
         VdbeComment((v, "raise(IGNORE)"));
................................................................................
  assert( jumpIfNull==SQLITE_JUMPIFNULL || jumpIfNull==0 );
  if( v==0 || pExpr==0 ) return;
  op = pExpr->op;
  switch( op ){
    case TK_AND: {
      int d2 = sqlite3VdbeMakeLabel(v);
      testcase( jumpIfNull==0 );
      testcase( pParse->disableColCache==0 );
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, d2,jumpIfNull^SQLITE_JUMPIFNULL);
      pParse->disableColCache++;
      sqlite3ExprIfTrue(pParse, pExpr->pRight, dest, jumpIfNull);
      assert( pParse->disableColCache>0 );
      pParse->disableColCache--;
      sqlite3VdbeResolveLabel(v, d2);

      break;
    }
    case TK_OR: {
      testcase( jumpIfNull==0 );
      testcase( pParse->disableColCache==0 );
      sqlite3ExprIfTrue(pParse, pExpr->pLeft, dest, jumpIfNull);
      pParse->disableColCache++;
      sqlite3ExprIfTrue(pParse, pExpr->pRight, dest, jumpIfNull);
      assert( pParse->disableColCache>0 );
      pParse->disableColCache--;
      break;
    }
    case TK_NOT: {
      testcase( jumpIfNull==0 );
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, dest, jumpIfNull);
      break;
    }
................................................................................
  assert( pExpr->op!=TK_LE || op==OP_Gt );
  assert( pExpr->op!=TK_GT || op==OP_Le );
  assert( pExpr->op!=TK_GE || op==OP_Lt );

  switch( pExpr->op ){
    case TK_AND: {
      testcase( jumpIfNull==0 );
      testcase( pParse->disableColCache==0 );
      sqlite3ExprIfFalse(pParse, pExpr->pLeft, dest, jumpIfNull);
      pParse->disableColCache++;
      sqlite3ExprIfFalse(pParse, pExpr->pRight, dest, jumpIfNull);
      assert( pParse->disableColCache>0 );
      pParse->disableColCache--;
      break;
    }
    case TK_OR: {
      int d2 = sqlite3VdbeMakeLabel(v);
      testcase( jumpIfNull==0 );
      testcase( pParse->disableColCache==0 );
      sqlite3ExprIfTrue(pParse, pExpr->pLeft, d2, jumpIfNull^SQLITE_JUMPIFNULL);
      pParse->disableColCache++;
      sqlite3ExprIfFalse(pParse, pExpr->pRight, dest, jumpIfNull);
      assert( pParse->disableColCache>0 );
      pParse->disableColCache--;
      sqlite3VdbeResolveLabel(v, d2);

      break;
    }
    case TK_NOT: {
      sqlite3ExprIfTrue(pParse, pExpr->pLeft, dest, jumpIfNull);
      break;
    }
    case TK_LT:
................................................................................
    for(pItem=pList->a, i=0; i<pList->nExpr; i++, pItem++){
      sqlite3ExprAnalyzeAggregates(pNC, pItem->pExpr);
    }
  }
}

/*
** Allocate or deallocate temporary use registers during code generation.
*/
SQLITE_PRIVATE int sqlite3GetTempReg(Parse *pParse){
  if( pParse->nTempReg==0 ){
    return ++pParse->nMem;
  }
  return pParse->aTempReg[--pParse->nTempReg];
}









SQLITE_PRIVATE void sqlite3ReleaseTempReg(Parse *pParse, int iReg){
  if( iReg && pParse->nTempReg<ArraySize(pParse->aTempReg) ){
    sqlite3ExprWritableRegister(pParse, iReg);








    pParse->aTempReg[pParse->nTempReg++] = iReg;
  }
}

/*
** Allocate or deallocate a block of nReg consecutive registers
*/
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that used to generate VDBE code
** that implements the ALTER TABLE command.
**
** $Id: alter.c,v 1.55 2009/03/24 15:08:10 drh Exp $
*/

/*
** The code in this file only exists if we are not omitting the
** ALTER TABLE logic from the build.
*/
#ifndef SQLITE_OMIT_ALTERTABLE
................................................................................
  char *zWhere;
  int iDb;                   /* Index of database containing pTab */
#ifndef SQLITE_OMIT_TRIGGER
  Trigger *pTrig;
#endif

  v = sqlite3GetVdbe(pParse);
  if( !v ) return;
  assert( sqlite3BtreeHoldsAllMutexes(pParse->db) );
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  assert( iDb>=0 );

#ifndef SQLITE_OMIT_TRIGGER
  /* Drop any table triggers from the internal schema. */
  for(pTrig=sqlite3TriggerList(pParse, pTab); pTrig; pTrig=pTrig->pNext){
................................................................................
  const char *zTabName;     /* Original name of the table */
  Vdbe *v;
#ifndef SQLITE_OMIT_TRIGGER
  char *zWhere = 0;         /* Where clause to locate temp triggers */
#endif
  int isVirtualRename = 0;  /* True if this is a v-table with an xRename() */
  
  if( db->mallocFailed ) goto exit_rename_table;
  assert( pSrc->nSrc==1 );
  assert( sqlite3BtreeHoldsAllMutexes(pParse->db) );

  pTab = sqlite3LocateTable(pParse, 0, pSrc->a[0].zName, pSrc->a[0].zDatabase);
  if( !pTab ) goto exit_rename_table;
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  zDb = db->aDb[iDb].zName;
................................................................................
    sqlite3ValueFree(pVal);
  }

  /* Modify the CREATE TABLE statement. */
  zCol = sqlite3DbStrNDup(db, (char*)pColDef->z, pColDef->n);
  if( zCol ){
    char *zEnd = &zCol[pColDef->n-1];
    while( (zEnd>zCol && *zEnd==';') || sqlite3Isspace(*zEnd) ){
      *zEnd-- = '\0';
    }
    sqlite3NestedParse(pParse, 
        "UPDATE \"%w\".%s SET "
          "sql = substr(sql,1,%d) || ', ' || %Q || substr(sql,%d) "
        "WHERE type = 'table' AND name = %Q", 
      zDb, SCHEMA_TABLE(iDb), pNew->addColOffset, zCol, pNew->addColOffset+1,
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code associated with the ANALYZE command.
**
** @(#) $Id: analyze.c,v 1.51 2009/02/28 10:47:42 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_ANALYZE

/*
** This routine generates code that opens the sqlite_stat1 table on cursor
** iStatCur.
**
................................................................................
  int i;           /* Loop counter */
  int topOfLoop;   /* The top of the loop */
  int endOfLoop;   /* The end of the loop */
  int addr;        /* The address of an instruction */
  int iDb;         /* Index of database containing pTab */

  v = sqlite3GetVdbe(pParse);
  if( v==0 || pTab==0 || pTab->pIndex==0 ){
    /* Do no analysis for tables that have no indices */
    return;
  }
  assert( sqlite3BtreeHoldsAllMutexes(pParse->db) );
  iDb = sqlite3SchemaToIndex(pParse->db, pTab->pSchema);
  assert( iDb>=0 );
#ifndef SQLITE_OMIT_AUTHORIZATION
................................................................................
  /* Read the database schema. If an error occurs, leave an error message
  ** and code in pParse and return NULL. */
  assert( sqlite3BtreeHoldsAllMutexes(pParse->db) );
  if( SQLITE_OK!=sqlite3ReadSchema(pParse) ){
    return;
  }


  if( pName1==0 ){
    /* Form 1:  Analyze everything */
    for(i=0; i<db->nDb; i++){
      if( i==1 ) continue;  /* Do not analyze the TEMP database */
      analyzeDatabase(pParse, i);
    }
  }else if( pName2==0 || pName2->n==0 ){
    /* Form 2:  Analyze the database or table named */
    iDb = sqlite3FindDb(db, pName1);
    if( iDb>=0 ){
      analyzeDatabase(pParse, iDb);
    }else{
      z = sqlite3NameFromToken(db, pName1);
      if( z ){
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the ATTACH and DETACH commands.
**
** $Id: attach.c,v 1.83 2009/02/19 14:39:25 danielk1977 Exp $
*/

#ifndef SQLITE_OMIT_ATTACH
/*
** Resolve an expression that was part of an ATTACH or DETACH statement. This
** is slightly different from resolving a normal SQL expression, because simple
** identifiers are treated as strings, not possible column names or aliases.
................................................................................
  int i;
  int rc = 0;
  sqlite3 *db = sqlite3_context_db_handle(context);
  const char *zName;
  const char *zFile;
  Db *aNew;
  char *zErrDyn = 0;
  char zErr[128];

  UNUSED_PARAMETER(NotUsed);

  zFile = (const char *)sqlite3_value_text(argv[0]);
  zName = (const char *)sqlite3_value_text(argv[1]);
  if( zFile==0 ) zFile = "";
  if( zName==0 ) zName = "";
................................................................................
  /* Check for the following errors:
  **
  **     * Too many attached databases,
  **     * Transaction currently open
  **     * Specified database name already being used.
  */
  if( db->nDb>=db->aLimit[SQLITE_LIMIT_ATTACHED]+2 ){
    sqlite3_snprintf(
      sizeof(zErr), zErr, "too many attached databases - max %d", 
      db->aLimit[SQLITE_LIMIT_ATTACHED]
    );
    goto attach_error;
  }
  if( !db->autoCommit ){
    sqlite3_snprintf(sizeof(zErr), zErr,
                     "cannot ATTACH database within transaction");
    goto attach_error;
  }
  for(i=0; i<db->nDb; i++){
    char *z = db->aDb[i].zName;
    if( z && zName && sqlite3StrICmp(z, zName)==0 ){
      sqlite3_snprintf(sizeof(zErr), zErr, 
                       "database %s is already in use", zName);
      goto attach_error;
    }
  }

  /* Allocate the new entry in the db->aDb[] array and initialise the schema
  ** hash tables.
  */
................................................................................
    if( aNew==0 ) return;
    memcpy(aNew, db->aDb, sizeof(db->aDb[0])*2);
  }else{
    aNew = sqlite3DbRealloc(db, db->aDb, sizeof(db->aDb[0])*(db->nDb+1) );
    if( aNew==0 ) return;
  }
  db->aDb = aNew;
  aNew = &db->aDb[db->nDb++];
  memset(aNew, 0, sizeof(*aNew));

  /* Open the database file. If the btree is successfully opened, use
  ** it to obtain the database schema. At this point the schema may
  ** or may not be initialised.
  */
  rc = sqlite3BtreeFactory(db, zFile, 0, SQLITE_DEFAULT_CACHE_SIZE,
                           db->openFlags | SQLITE_OPEN_MAIN_DB,
                           &aNew->pBt);




  if( rc==SQLITE_OK ){
    Pager *pPager;
    aNew->pSchema = sqlite3SchemaGet(db, aNew->pBt);
    if( !aNew->pSchema ){
      rc = SQLITE_NOMEM;
    }else if( aNew->pSchema->file_format && aNew->pSchema->enc!=ENC(db) ){
      sqlite3_snprintf(sizeof(zErr), zErr, 
        "attached databases must use the same text encoding as main database");
      goto attach_error;
    }
    pPager = sqlite3BtreePager(aNew->pBt);
    sqlite3PagerLockingMode(pPager, db->dfltLockMode);
    sqlite3PagerJournalMode(pPager, db->dfltJournalMode);
  }
  aNew->zName = sqlite3DbStrDup(db, zName);
  aNew->safety_level = 3;
................................................................................
      db->aDb[iDb].pBt = 0;
      db->aDb[iDb].pSchema = 0;
    }
    sqlite3ResetInternalSchema(db, 0);
    db->nDb = iDb;
    if( rc==SQLITE_NOMEM || rc==SQLITE_IOERR_NOMEM ){
      db->mallocFailed = 1;

      sqlite3_snprintf(sizeof(zErr),zErr, "out of memory");
    }else{

      sqlite3_snprintf(sizeof(zErr),zErr, "unable to open database: %s", zFile);
    }
    goto attach_error;
  }
  
  return;

attach_error:
  /* Return an error if we get here */
  if( zErrDyn ){
    sqlite3_result_error(context, zErrDyn, -1);
    sqlite3DbFree(db, zErrDyn);
  }else{
    zErr[sizeof(zErr)-1] = 0;
    sqlite3_result_error(context, zErr, -1);
  }
  if( rc ) sqlite3_result_error_code(context, rc);
}

/*
** An SQL user-function registered to do the work of an DETACH statement. The
** three arguments to the function come directly from a detach statement:
................................................................................
  Parse *pParse,      /* Error messages will be written here */
  int iDb,            /* This is the database that must be used */
  const char *zType,  /* "view", "trigger", or "index" */
  const Token *pName  /* Name of the view, trigger, or index */
){
  sqlite3 *db;

  if( iDb<0 || iDb==1 ) return 0;
  db = pParse->db;
  assert( db->nDb>iDb );
  pFix->pParse = pParse;
  pFix->zDb = db->aDb[iDb].zName;
  pFix->zType = zType;
  pFix->pName = pName;
  return 1;
................................................................................
  DbFixer *pFix,       /* Context of the fixation */
  SrcList *pList       /* The Source list to check and modify */
){
  int i;
  const char *zDb;
  struct SrcList_item *pItem;

  if( pList==0 ) return 0;
  zDb = pFix->zDb;
  for(i=0, pItem=pList->a; i<pList->nSrc; i++, pItem++){
    if( pItem->zDatabase==0 ){
      pItem->zDatabase = sqlite3DbStrDup(pFix->pParse->db, zDb);
    }else if( sqlite3StrICmp(pItem->zDatabase,zDb)!=0 ){
      sqlite3ErrorMsg(pFix->pParse,
         "%s %T cannot reference objects in database %s",
................................................................................
  return 0;
}
SQLITE_PRIVATE int sqlite3FixExpr(
  DbFixer *pFix,     /* Context of the fixation */
  Expr *pExpr        /* The expression to be fixed to one database */
){
  while( pExpr ){
    if( ExprHasAnyProperty(pExpr, EP_TokenOnly|EP_SpanOnly) ) break;
    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
      if( sqlite3FixSelect(pFix, pExpr->x.pSelect) ) return 1;
    }else{
      if( sqlite3FixExprList(pFix, pExpr->x.pList) ) return 1;
    }
    if( sqlite3FixExpr(pFix, pExpr->pRight) ){
      return 1;
................................................................................
**
*************************************************************************
** This file contains code used to implement the sqlite3_set_authorizer()
** API.  This facility is an optional feature of the library.  Embedded
** systems that do not need this facility may omit it by recompiling
** the library with -DSQLITE_OMIT_AUTHORIZATION=1
**
** $Id: auth.c,v 1.29 2007/09/18 15:55:07 drh Exp $
*/

/*
** All of the code in this file may be omitted by defining a single
** macro.
*/
#ifndef SQLITE_OMIT_AUTHORIZATION
................................................................................
  return SQLITE_OK;
}

/*
** Write an error message into pParse->zErrMsg that explains that the
** user-supplied authorization function returned an illegal value.
*/
static void sqliteAuthBadReturnCode(Parse *pParse, int rc){
  sqlite3ErrorMsg(pParse, "illegal return value (%d) from the "
    "authorization function - should be SQLITE_OK, SQLITE_IGNORE, "
    "or SQLITE_DENY", rc);
  pParse->rc = SQLITE_ERROR;
}

/*
** The pExpr should be a TK_COLUMN expression.  The table referred to
** is in pTabList or else it is the NEW or OLD table of a trigger.  
** Check to see if it is OK to read this particular column.
................................................................................
  const char *zCol;     /* Name of the column of the table */
  int iSrc;             /* Index in pTabList->a[] of table being read */
  const char *zDBase;   /* Name of database being accessed */
  TriggerStack *pStack; /* The stack of current triggers */
  int iDb;              /* The index of the database the expression refers to */

  if( db->xAuth==0 ) return;
  if( pExpr->op!=TK_COLUMN ) return;
  iDb = sqlite3SchemaToIndex(pParse->db, pSchema);
  if( iDb<0 ){
    /* An attempt to read a column out of a subquery or other
    ** temporary table. */
    return;
  }
  for(iSrc=0; pTabList && iSrc<pTabList->nSrc; iSrc++){

    if( pExpr->iTable==pTabList->a[iSrc].iCursor ) break;
  }
  if( iSrc>=0 && pTabList && iSrc<pTabList->nSrc ){
    pTab = pTabList->a[iSrc].pTab;

  }else if( (pStack = pParse->trigStack)!=0 ){

    /* This must be an attempt to read the NEW or OLD pseudo-tables
    ** of a trigger.
    */
    assert( pExpr->iTable==pStack->newIdx || pExpr->iTable==pStack->oldIdx );
    pTab = pStack->pTab;
  }
  if( pTab==0 ) return;


  if( pExpr->iColumn>=0 ){
    assert( pExpr->iColumn<pTab->nCol );
    zCol = pTab->aCol[pExpr->iColumn].zName;
  }else if( pTab->iPKey>=0 ){
    assert( pTab->iPKey<pTab->nCol );
    zCol = pTab->aCol[pTab->iPKey].zName;
  }else{
................................................................................
      sqlite3ErrorMsg(pParse, "access to %s.%s.%s is prohibited", 
         zDBase, pTab->zName, zCol);
    }else{
      sqlite3ErrorMsg(pParse, "access to %s.%s is prohibited",pTab->zName,zCol);
    }
    pParse->rc = SQLITE_AUTH;
  }else if( rc!=SQLITE_OK ){
    sqliteAuthBadReturnCode(pParse, rc);
  }
}

/*
** Do an authorization check using the code and arguments given.  Return
** either SQLITE_OK (zero) or SQLITE_IGNORE or SQLITE_DENY.  If SQLITE_DENY
** is returned, then the error count and error message in pParse are
................................................................................
  }
  rc = db->xAuth(db->pAuthArg, code, zArg1, zArg2, zArg3, pParse->zAuthContext);
  if( rc==SQLITE_DENY ){
    sqlite3ErrorMsg(pParse, "not authorized");
    pParse->rc = SQLITE_AUTH;
  }else if( rc!=SQLITE_OK && rc!=SQLITE_IGNORE ){
    rc = SQLITE_DENY;
    sqliteAuthBadReturnCode(pParse, rc);
  }
  return rc;
}

/*
** Push an authorization context.  After this routine is called, the
** zArg3 argument to authorization callbacks will be zContext until
................................................................................
** popped.  Or if pParse==0, this routine is a no-op.
*/
SQLITE_PRIVATE void sqlite3AuthContextPush(
  Parse *pParse,
  AuthContext *pContext, 
  const char *zContext
){

  pContext->pParse = pParse;
  if( pParse ){
    pContext->zAuthContext = pParse->zAuthContext;
    pParse->zAuthContext = zContext;
  }
}

/*
** Pop an authorization context that was previously pushed
** by sqlite3AuthContextPush
*/
SQLITE_PRIVATE void sqlite3AuthContextPop(AuthContext *pContext){
................................................................................
**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.527 2009/03/31 03:41:57 shane Exp $
*/

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.
*/
SQLITE_PRIVATE void sqlite3BeginParse(Parse *pParse, int explainFlag){
................................................................................
      u32 mask;
      int iDb;
      sqlite3VdbeJumpHere(v, pParse->cookieGoto-1);
      for(iDb=0, mask=1; iDb<db->nDb; mask<<=1, iDb++){
        if( (mask & pParse->cookieMask)==0 ) continue;
        sqlite3VdbeUsesBtree(v, iDb);
        sqlite3VdbeAddOp2(v,OP_Transaction, iDb, (mask & pParse->writeMask)!=0);

        sqlite3VdbeAddOp2(v,OP_VerifyCookie, iDb, pParse->cookieValue[iDb]);

      }
#ifndef SQLITE_OMIT_VIRTUALTABLE
      {
        int i;
        for(i=0; i<pParse->nVtabLock; i++){
          char *vtab = (char *)pParse->apVtabLock[i]->pVtab;
          sqlite3VdbeAddOp4(v, OP_VBegin, 0, 0, 0, vtab, P4_VTAB);
................................................................................
  /* Get the VDBE program ready for execution
  */
  if( v && pParse->nErr==0 && !db->mallocFailed ){
#ifdef SQLITE_DEBUG
    FILE *trace = (db->flags & SQLITE_VdbeTrace)!=0 ? stdout : 0;
    sqlite3VdbeTrace(v, trace);
#endif
    assert( pParse->disableColCache==0 );  /* Disables and re-enables match */
    sqlite3VdbeMakeReady(v, pParse->nVar, pParse->nMem,
                         pParse->nTab, pParse->explain);
    pParse->rc = SQLITE_DONE;
    pParse->colNamesSet = 0;
  }else if( pParse->rc==SQLITE_OK ){
    pParse->rc = SQLITE_ERROR;
  }
................................................................................
** See also sqlite3LocateTable().
*/
SQLITE_PRIVATE Table *sqlite3FindTable(sqlite3 *db, const char *zName, const char *zDatabase){
  Table *p = 0;
  int i;
  int nName;
  assert( zName!=0 );
  nName = sqlite3Strlen(db, zName) + 1;
  for(i=OMIT_TEMPDB; i<db->nDb; i++){
    int j = (i<2) ? i^1 : i;   /* Search TEMP before MAIN */
    if( zDatabase!=0 && sqlite3StrICmp(zDatabase, db->aDb[j].zName) ) continue;
    p = sqlite3HashFind(&db->aDb[j].pSchema->tblHash, zName, nName);
    if( p ) break;
  }
  return p;
................................................................................
** for duplicate index names is done.)  The search order is
** TEMP first, then MAIN, then any auxiliary databases added
** using the ATTACH command.
*/
SQLITE_PRIVATE Index *sqlite3FindIndex(sqlite3 *db, const char *zName, const char *zDb){
  Index *p = 0;
  int i;
  int nName = sqlite3Strlen(db, zName)+1;
  for(i=OMIT_TEMPDB; i<db->nDb; i++){
    int j = (i<2) ? i^1 : i;  /* Search TEMP before MAIN */
    Schema *pSchema = db->aDb[j].pSchema;
    if( zDb && sqlite3StrICmp(zDb, db->aDb[j].zName) ) continue;
    assert( pSchema || (j==1 && !db->aDb[1].pBt) );
    if( pSchema ){
      p = sqlite3HashFind(&pSchema->idxHash, zName, nName);
................................................................................
** Unlinking from the Table must be done by the calling function.
*/
static void sqlite3DeleteIndex(Index *p){
  Index *pOld;
  const char *zName = p->zName;

  pOld = sqlite3HashInsert(&p->pSchema->idxHash, zName,
                           sqlite3Strlen30(zName)+1, 0);
  assert( pOld==0 || pOld==p );
  freeIndex(p);
}

/*
** For the index called zIdxName which is found in the database iDb,
** unlike that index from its Table then remove the index from
................................................................................
** with the index.
*/
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteIndex(sqlite3 *db, int iDb, const char *zIdxName){
  Index *pIndex;
  int len;
  Hash *pHash = &db->aDb[iDb].pSchema->idxHash;

  len = sqlite3Strlen(db, zIdxName);
  pIndex = sqlite3HashInsert(pHash, zIdxName, len+1, 0);
  if( pIndex ){
    if( pIndex->pTable->pIndex==pIndex ){
      pIndex->pTable->pIndex = pIndex->pNext;
    }else{
      Index *p;
      for(p=pIndex->pTable->pIndex; p && p->pNext!=pIndex; p=p->pNext){}
      if( p && p->pNext==pIndex ){
................................................................................
}

/*
** Remove the memory data structures associated with the given
** Table.  No changes are made to disk by this routine.
**
** This routine just deletes the data structure.  It does not unlink
** the table data structure from the hash table.  Nor does it remove
** foreign keys from the sqlite.aFKey hash table.  But it does destroy
** memory structures of the indices and foreign keys associated with 
** the table.
*/
SQLITE_PRIVATE void sqlite3DeleteTable(Table *pTable){
  Index *pIndex, *pNext;
  FKey *pFKey, *pNextFKey;
  sqlite3 *db;
................................................................................
  for(pIndex = pTable->pIndex; pIndex; pIndex=pNext){
    pNext = pIndex->pNext;
    assert( pIndex->pSchema==pTable->pSchema );
    sqlite3DeleteIndex(pIndex);
  }

#ifndef SQLITE_OMIT_FOREIGN_KEY
  /* Delete all foreign keys associated with this table.  The keys
  ** should have already been unlinked from the pSchema->aFKey hash table 
  */
  for(pFKey=pTable->pFKey; pFKey; pFKey=pNextFKey){
    pNextFKey = pFKey->pNextFrom;
    assert( sqlite3HashFind(&pTable->pSchema->aFKey,
                           pFKey->zTo, sqlite3Strlen30(pFKey->zTo)+1)!=pFKey );
    sqlite3DbFree(db, pFKey);
  }
#endif

  /* Delete the Table structure itself.
  */
  sqliteResetColumnNames(pTable);
................................................................................

/*
** Unlink the given table from the hash tables and the delete the
** table structure with all its indices and foreign keys.
*/
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteTable(sqlite3 *db, int iDb, const char *zTabName){
  Table *p;
  FKey *pF1, *pF2;
  Db *pDb;

  assert( db!=0 );
  assert( iDb>=0 && iDb<db->nDb );
  assert( zTabName && zTabName[0] );
  pDb = &db->aDb[iDb];
  p = sqlite3HashInsert(&pDb->pSchema->tblHash, zTabName,
                        sqlite3Strlen30(zTabName)+1,0);
  if( p ){
#ifndef SQLITE_OMIT_FOREIGN_KEY
    for(pF1=p->pFKey; pF1; pF1=pF1->pNextFrom){
      int nTo = sqlite3Strlen30(pF1->zTo) + 1;
      pF2 = sqlite3HashFind(&pDb->pSchema->aFKey, pF1->zTo, nTo);
      if( pF2==pF1 ){
        sqlite3HashInsert(&pDb->pSchema->aFKey, pF1->zTo, nTo, pF1->pNextTo);
      }else{
        while( pF2 && pF2->pNextTo!=pF1 ){ pF2=pF2->pNextTo; }
        if( pF2 ){
          pF2->pNextTo = pF1->pNextTo;
        }
      }
    }
#endif
    sqlite3DeleteTable(p);
  }
  db->flags |= SQLITE_InternChanges;
}

/*
** Given a token, return a string that consists of the text of that
** token with any quotations removed.  Space to hold the returned string
** is obtained from sqliteMalloc() and must be freed by the calling
** function.



**
** Tokens are often just pointers into the original SQL text and so
** are not \000 terminated and are not persistent.  The returned string
** is \000 terminated and is persistent.
*/
SQLITE_PRIVATE char *sqlite3NameFromToken(sqlite3 *db, Token *pName){
  char *zName;
  if( pName ){
    zName = sqlite3DbStrNDup(db, (char*)pName->z, pName->n);
    sqlite3Dequote(zName);
  }else{
    zName = 0;
  }
  return zName;
}

/*
................................................................................
          pCol->zName);
    }else{
      /* A copy of pExpr is used instead of the original, as pExpr contains
      ** tokens that point to volatile memory. The 'span' of the expression
      ** is required by pragma table_info.
      */
      sqlite3ExprDelete(db, pCol->pDflt);
      pCol->pDflt = sqlite3ExprDup(
          db, pExpr, EXPRDUP_REDUCE|EXPRDUP_DISTINCTSPAN
      );
    }
  }
  sqlite3ExprDelete(db, pExpr);
}

/*
** Designate the PRIMARY KEY for the table.  pList is a list of names 
................................................................................
  CollSeq *pColl;

  pColl = sqlite3FindCollSeq(db, enc, zName, nName, initbusy);
  if( !initbusy && (!pColl || !pColl->xCmp) ){
    pColl = sqlite3GetCollSeq(db, pColl, zName, nName);
    if( !pColl ){
      if( nName<0 ){
        nName = sqlite3Strlen(db, zName);
      }
      sqlite3ErrorMsg(pParse, "no such collation sequence: %.*s", nName, zName);
      pColl = 0;
    }
  }

  return pColl;
................................................................................
  }


  /* Add the table to the in-memory representation of the database.
  */
  if( db->init.busy && pParse->nErr==0 ){
    Table *pOld;
    FKey *pFKey; 
    Schema *pSchema = p->pSchema;
    pOld = sqlite3HashInsert(&pSchema->tblHash, p->zName,
                             sqlite3Strlen30(p->zName)+1,p);
    if( pOld ){
      assert( p==pOld );  /* Malloc must have failed inside HashInsert() */
      db->mallocFailed = 1;
      return;
    }
#ifndef SQLITE_OMIT_FOREIGN_KEY
    for(pFKey=p->pFKey; pFKey; pFKey=pFKey->pNextFrom){
      void *data;
      int nTo = sqlite3Strlen30(pFKey->zTo) + 1;
      pFKey->pNextTo = sqlite3HashFind(&pSchema->aFKey, pFKey->zTo, nTo);
      data = sqlite3HashInsert(&pSchema->aFKey, pFKey->zTo, nTo, pFKey);
      if( data==(void *)pFKey ){
        db->mallocFailed = 1;
      }
    }
#endif
    pParse->pNewTable = 0;
    db->nTable++;
    db->flags |= SQLITE_InternChanges;

#ifndef SQLITE_OMIT_ALTERTABLE
    if( !p->pSelect ){
      const char *zName = (const char *)pParse->sNameToken.z;
................................................................................
** connect the key to the last column inserted.  pTo is the name of
** the table referred to.  pToCol is a list of tables in the other
** pTo table that the foreign key points to.  flags contains all
** information about the conflict resolution algorithms specified
** in the ON DELETE, ON UPDATE and ON INSERT clauses.
**
** An FKey structure is created and added to the table currently
** under construction in the pParse->pNewTable field.  The new FKey
** is not linked into db->aFKey at this point - that does not happen
** until sqlite3EndTable().
**
** The foreign key is set for IMMEDIATE processing.  A subsequent call
** to sqlite3DeferForeignKey() might change this to DEFERRED.
*/
SQLITE_PRIVATE void sqlite3CreateForeignKey(
  Parse *pParse,       /* Parsing context */
  ExprList *pFromCol,  /* Columns in this table that point to other table */
................................................................................
    sqlite3ErrorMsg(pParse,
        "number of columns in foreign key does not match the number of "
        "columns in the referenced table");
    goto fk_end;
  }else{
    nCol = pFromCol->nExpr;
  }
  nByte = sizeof(*pFKey) + nCol*sizeof(pFKey->aCol[0]) + pTo->n + 1;
  if( pToCol ){
    for(i=0; i<pToCol->nExpr; i++){
      nByte += sqlite3Strlen30(pToCol->a[i].zName) + 1;
    }
  }
  pFKey = sqlite3DbMallocZero(db, nByte );
  if( pFKey==0 ){
    goto fk_end;
  }
  pFKey->pFrom = p;
  pFKey->pNextFrom = p->pFKey;
  z = (char*)&pFKey[1];
  pFKey->aCol = (struct sColMap*)z;
  z += sizeof(struct sColMap)*nCol;
  pFKey->zTo = z;
  memcpy(z, pTo->z, pTo->n);
  z[pTo->n] = 0;

  z += pTo->n+1;
  pFKey->pNextTo = 0;
  pFKey->nCol = nCol;
  if( pFromCol==0 ){
    pFKey->aCol[0].iFrom = p->nCol-1;
  }else{
    for(i=0; i<nCol; i++){
      int j;
      for(j=0; j<p->nCol; j++){
................................................................................
    sqlite3VdbeChangeP5(v, 1);
  }
  sqlite3OpenTable(pParse, iTab, iDb, pTab, OP_OpenRead);
  addr1 = sqlite3VdbeAddOp2(v, OP_Rewind, iTab, 0);
  regRecord = sqlite3GetTempReg(pParse);
  regIdxKey = sqlite3GenerateIndexKey(pParse, pIndex, iTab, regRecord, 1);
  if( pIndex->onError!=OE_None ){
    int j1, j2;
    int regRowid;



    regRowid = regIdxKey + pIndex->nColumn;
    j1 = sqlite3VdbeAddOp3(v, OP_IsNull, regIdxKey, 0, pIndex->nColumn);








    j2 = sqlite3VdbeAddOp4(v, OP_IsUnique, iIdx,
                           0, regRowid, SQLITE_INT_TO_PTR(regRecord), P4_INT32);
    sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, OE_Abort, 0,
                    "indexed columns are not unique", P4_STATIC);
    sqlite3VdbeJumpHere(v, j1);
    sqlite3VdbeJumpHere(v, j2);
  }
  sqlite3VdbeAddOp2(v, OP_IdxInsert, iIdx, regRecord);

  sqlite3ReleaseTempReg(pParse, regRecord);
  sqlite3VdbeAddOp2(v, OP_Next, iTab, addr1+1);
  sqlite3VdbeJumpHere(v, addr1);
  sqlite3VdbeAddOp1(v, OP_Close, iTab);
  sqlite3VdbeAddOp1(v, OP_Close, iIdx);
}

................................................................................

  /* Link the new Index structure to its table and to the other
  ** in-memory database structures. 
  */
  if( db->init.busy ){
    Index *p;
    p = sqlite3HashInsert(&pIndex->pSchema->idxHash, 
                          pIndex->zName, sqlite3Strlen30(pIndex->zName)+1,
                          pIndex);
    if( p ){
      assert( p==pIndex );  /* Malloc must have failed */
      db->mallocFailed = 1;
      goto exit_create_index;
    }
    db->flags |= SQLITE_InternChanges;
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains functions used to access the internal hash tables
** of user defined functions and collation sequences.
**
** $Id: callback.c,v 1.37 2009/03/24 15:08:10 drh Exp $
*/


/*
** Invoke the 'collation needed' callback to request a collation sequence
** in the database text encoding of name zName, length nName.
** If the collation sequence
*/
static void callCollNeeded(sqlite3 *db, const char *zName, int nName){
  assert( !db->xCollNeeded || !db->xCollNeeded16 );
  if( nName<0 ) nName = sqlite3Strlen(db, zName);
  if( db->xCollNeeded ){
    char *zExternal = sqlite3DbStrNDup(db, zName, nName);
    if( !zExternal ) return;
    db->xCollNeeded(db->pCollNeededArg, db, (int)ENC(db), zExternal);
    sqlite3DbFree(db, zExternal);
  }
#ifndef SQLITE_OMIT_UTF16
................................................................................
static CollSeq *findCollSeqEntry(
  sqlite3 *db,
  const char *zName,
  int nName,
  int create
){
  CollSeq *pColl;
  if( nName<0 ) nName = sqlite3Strlen(db, zName);
  pColl = sqlite3HashFind(&db->aCollSeq, zName, nName);

  if( 0==pColl && create ){
    pColl = sqlite3DbMallocZero(db, 3*sizeof(*pColl) + nName + 1 );
    if( pColl ){
      CollSeq *pDel = 0;
      pColl[0].zName = (char*)&pColl[3];
................................................................................
  Hash temp1;
  Hash temp2;
  HashElem *pElem;
  Schema *pSchema = (Schema *)p;

  temp1 = pSchema->tblHash;
  temp2 = pSchema->trigHash;
  sqlite3HashInit(&pSchema->trigHash, 0);
  sqlite3HashClear(&pSchema->aFKey);
  sqlite3HashClear(&pSchema->idxHash);
  for(pElem=sqliteHashFirst(&temp2); pElem; pElem=sqliteHashNext(pElem)){
    sqlite3DeleteTrigger(0, (Trigger*)sqliteHashData(pElem));
  }
  sqlite3HashClear(&temp2);
  sqlite3HashInit(&pSchema->tblHash, 0);
  for(pElem=sqliteHashFirst(&temp1); pElem; pElem=sqliteHashNext(pElem)){
    Table *pTab = sqliteHashData(pElem);
    assert( pTab->dbMem==0 );
    sqlite3DeleteTable(pTab);
  }
  sqlite3HashClear(&temp1);
  pSchema->pSeqTab = 0;
................................................................................
    p = (Schema *)sqlite3BtreeSchema(pBt, sizeof(Schema), sqlite3SchemaFree);
  }else{
    p = (Schema *)sqlite3MallocZero(sizeof(Schema));
  }
  if( !p ){
    db->mallocFailed = 1;
  }else if ( 0==p->file_format ){
    sqlite3HashInit(&p->tblHash, 0);
    sqlite3HashInit(&p->idxHash, 0);
    sqlite3HashInit(&p->trigHash, 0);
    sqlite3HashInit(&p->aFKey, 1);
    p->enc = SQLITE_UTF8;
  }
  return p;
}

/************** End of callback.c ********************************************/
/************** Begin file delete.c ******************************************/
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.198 2009/03/05 03:48:07 shane Exp $
*/

/*
** Look up every table that is named in pSrc.  If any table is not found,
** add an error message to pParse->zErrMsg and return NULL.  If all tables
** are found, return a pointer to the last table.
*/
................................................................................
    sqlite3ErrorMsg(pParse,"cannot modify %s because it is a view",pTab->zName);
    return 1;
  }
#endif
  return 0;
}

/*
** Generate code that will open a table for reading.
*/
SQLITE_PRIVATE void sqlite3OpenTable(
  Parse *p,       /* Generate code into this VDBE */
  int iCur,       /* The cursor number of the table */
  int iDb,        /* The database index in sqlite3.aDb[] */
  Table *pTab,    /* The table to be opened */
  int opcode      /* OP_OpenRead or OP_OpenWrite */
){
  Vdbe *v;
  if( IsVirtual(pTab) ) return;
  v = sqlite3GetVdbe(p);
  assert( opcode==OP_OpenWrite || opcode==OP_OpenRead );
  sqlite3TableLock(p, iDb, pTab->tnum, (opcode==OP_OpenWrite)?1:0, pTab->zName);
  sqlite3VdbeAddOp3(v, opcode, iCur, pTab->tnum, iDb);
  sqlite3VdbeChangeP4(v, -1, SQLITE_INT_TO_PTR(pTab->nCol), P4_INT32);
  VdbeComment((v, "%s", pTab->zName));
}


#if !defined(SQLITE_OMIT_VIEW) && !defined(SQLITE_OMIT_TRIGGER)
/*
** Evaluate a view and store its result in an ephemeral table.  The
** pWhere argument is an optional WHERE clause that restricts the
** set of rows in the view that are to be added to the ephemeral table.
*/
................................................................................
  if( pWhere ){
    SrcList *pFrom;
    Token viewName;
    
    pWhere = sqlite3ExprDup(db, pWhere, 0);
    viewName.z = (u8*)pView->zName;
    viewName.n = (unsigned int)sqlite3Strlen30((const char*)viewName.z);

    pFrom = sqlite3SrcListAppendFromTerm(pParse, 0, 0, 0, &viewName, pDup, 0,0);
    pDup = sqlite3SelectNew(pParse, 0, pFrom, pWhere, 0, 0, 0, 0, 0, 0);
  }
  sqlite3SelectDestInit(&dest, SRT_EphemTab, iCur);
  sqlite3Select(pParse, pDup, &dest);
  sqlite3SelectDelete(db, pDup);
}
................................................................................
#ifndef SQLITE_OMIT_TRUNCATE_OPTIMIZATION
  /* Special case: A DELETE without a WHERE clause deletes everything.
  ** It is easier just to erase the whole table.  Note, however, that
  ** this means that the row change count will be incorrect.
  */
  if( rcauth==SQLITE_OK && pWhere==0 && !pTrigger && !IsVirtual(pTab) ){
    assert( !isView );
    sqlite3VdbeAddOp3(v, OP_Clear, pTab->tnum, iDb, memCnt);
    if( !pParse->nested ){
      sqlite3VdbeChangeP4(v, -1, pTab->zName, P4_STATIC);
    }
    for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
      assert( pIdx->pSchema==pTab->pSchema );
      sqlite3VdbeAddOp2(v, OP_Clear, pIdx->tnum, iDb);
    }
  }else
#endif /* SQLITE_OMIT_TRUNCATE_OPTIMIZATION */
  /* The usual case: There is a WHERE clause so we have to scan through
  ** the table and pick which records to delete.
  */
  {
    int iRowid = ++pParse->nMem;    /* Used for storing rowid values. */
    int iRowSet = ++pParse->nMem;   /* Register for rowset of rows to delete */


    /* Collect rowids of every row to be deleted.
    */
    sqlite3VdbeAddOp2(v, OP_Null, 0, iRowSet);
    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0,
                               WHERE_FILL_ROWSET, iRowSet);
    if( pWInfo==0 ) goto delete_from_cleanup;


    if( db->flags & SQLITE_CountRows ){
      sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1);
    }
    sqlite3WhereEnd(pWInfo);

    /* Open the pseudo-table used to store OLD if there are triggers.
    */
................................................................................
** This file contains the C functions that implement various SQL
** functions of SQLite.  
**
** There is only one exported symbol in this file - the function
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: func.c,v 1.225 2009/03/27 15:26:03 danielk1977 Exp $
*/

/*
** Return the collating function associated with a function.
*/
static CollSeq *sqlite3GetFuncCollSeq(sqlite3_context *context){
  return context->pColl;
................................................................................
  sqlite3_result_double(context, r);
}
#endif

/*
** Allocate nByte bytes of space using sqlite3_malloc(). If the
** allocation fails, call sqlite3_result_error_nomem() to notify
** the database handle that malloc() has failed.


*/
static void *contextMalloc(sqlite3_context *context, i64 nByte){
  char *z;
  if( nByte>sqlite3_context_db_handle(context)->aLimit[SQLITE_LIMIT_LENGTH] ){




    sqlite3_result_error_toobig(context);
    z = 0;
  }else{
    z = sqlite3Malloc((int)nByte);
    if( !z && nByte>0 ){
      sqlite3_result_error_nomem(context);
    }
  }
  return z;
}

/*
................................................................................
  sqlite3_context *context,
  int NotUsed,
  sqlite3_value **NotUsed2
){
  sqlite_int64 r;
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  sqlite3_randomness(sizeof(r), &r);
  if( (r<<1)==0 ) r = 0;  /* Prevent 0x8000.... as the result so that we */
                          /* can always do abs() of the result */









  sqlite3_result_int64(context, r);
}

/*
** Implementation of randomblob(N).  Return a random blob
** that is N bytes long.
*/
................................................................................
/*
** For LIKE and GLOB matching on EBCDIC machines, assume that every
** character is exactly one byte in size.  Also, all characters are
** able to participate in upper-case-to-lower-case mappings in EBCDIC
** whereas only characters less than 0x80 do in ASCII.
*/
#if defined(SQLITE_EBCDIC)
# define sqlite3Utf8Read(A,B,C)  (*(A++))
# define GlogUpperToLower(A)     A = sqlite3UpperToLower[A]
#else
# define GlogUpperToLower(A)     if( A<0x80 ){ A = sqlite3UpperToLower[A]; }
#endif

static const struct compareInfo globInfo = { '*', '?', '[', 0 };
/* The correct SQL-92 behavior is for the LIKE operator to ignore
................................................................................
  int seen;
  u8 matchOne = pInfo->matchOne;
  u8 matchAll = pInfo->matchAll;
  u8 matchSet = pInfo->matchSet;
  u8 noCase = pInfo->noCase; 
  int prevEscape = 0;     /* True if the previous character was 'escape' */

  while( (c = sqlite3Utf8Read(zPattern,0,&zPattern))!=0 ){
    if( !prevEscape && c==matchAll ){
      while( (c=sqlite3Utf8Read(zPattern,0,&zPattern)) == matchAll
               || c == matchOne ){
        if( c==matchOne && sqlite3Utf8Read(zString, 0, &zString)==0 ){
          return 0;
        }
      }
      if( c==0 ){
        return 1;
      }else if( c==esc ){
        c = sqlite3Utf8Read(zPattern, 0, &zPattern);
        if( c==0 ){
          return 0;
        }
      }else if( c==matchSet ){
        assert( esc==0 );         /* This is GLOB, not LIKE */
        assert( matchSet<0x80 );  /* '[' is a single-byte character */
        while( *zString && patternCompare(&zPattern[-1],zString,pInfo,esc)==0 ){
          SQLITE_SKIP_UTF8(zString);
        }
        return *zString!=0;
      }
      while( (c2 = sqlite3Utf8Read(zString,0,&zString))!=0 ){
        if( noCase ){
          GlogUpperToLower(c2);
          GlogUpperToLower(c);
          while( c2 != 0 && c2 != c ){
            c2 = sqlite3Utf8Read(zString, 0, &zString);
            GlogUpperToLower(c2);
          }
        }else{
          while( c2 != 0 && c2 != c ){
            c2 = sqlite3Utf8Read(zString, 0, &zString);
          }
        }
        if( c2==0 ) return 0;
        if( patternCompare(zPattern,zString,pInfo,esc) ) return 1;
      }
      return 0;
    }else if( !prevEscape && c==matchOne ){
      if( sqlite3Utf8Read(zString, 0, &zString)==0 ){
        return 0;
      }
    }else if( c==matchSet ){
      int prior_c = 0;
      assert( esc==0 );    /* This only occurs for GLOB, not LIKE */
      seen = 0;
      invert = 0;
      c = sqlite3Utf8Read(zString, 0, &zString);
      if( c==0 ) return 0;
      c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
      if( c2=='^' ){
        invert = 1;
        c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
      }
      if( c2==']' ){
        if( c==']' ) seen = 1;
        c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
      }
      while( c2 && c2!=']' ){
        if( c2=='-' && zPattern[0]!=']' && zPattern[0]!=0 && prior_c>0 ){
          c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
          if( c>=prior_c && c<=c2 ) seen = 1;
          prior_c = 0;
        }else{
          if( c==c2 ){
            seen = 1;
          }
          prior_c = c2;
        }
        c2 = sqlite3Utf8Read(zPattern, 0, &zPattern);
      }
      if( c2==0 || (seen ^ invert)==0 ){
        return 0;
      }
    }else if( esc==c && !prevEscape ){
      prevEscape = 1;
    }else{
      c2 = sqlite3Utf8Read(zString, 0, &zString);
      if( noCase ){
        GlogUpperToLower(c);
        GlogUpperToLower(c2);
      }
      if( c!=c2 ){
        return 0;
      }
................................................................................
static void likeFunc(
  sqlite3_context *context, 
  int argc, 
  sqlite3_value **argv
){
  const unsigned char *zA, *zB;
  int escape = 0;

  sqlite3 *db = sqlite3_context_db_handle(context);

  zB = sqlite3_value_text(argv[0]);
  zA = sqlite3_value_text(argv[1]);

  /* Limit the length of the LIKE or GLOB pattern to avoid problems
  ** of deep recursion and N*N behavior in patternCompare().
  */
  if( sqlite3_value_bytes(argv[0]) >


        db->aLimit[SQLITE_LIMIT_LIKE_PATTERN_LENGTH] ){
    sqlite3_result_error(context, "LIKE or GLOB pattern too complex", -1);
    return;
  }
  assert( zB==sqlite3_value_text(argv[0]) );  /* Encoding did not change */

  if( argc==3 ){
    /* The escape character string must consist of a single UTF-8 character.
................................................................................
    const unsigned char *zEsc = sqlite3_value_text(argv[2]);
    if( zEsc==0 ) return;
    if( sqlite3Utf8CharLen((char*)zEsc, -1)!=1 ){
      sqlite3_result_error(context, 
          "ESCAPE expression must be a single character", -1);
      return;
    }
    escape = sqlite3Utf8Read(zEsc, 0, &zEsc);
  }
  if( zA && zB ){
    struct compareInfo *pInfo = sqlite3_user_data(context);
#ifdef SQLITE_TEST
    sqlite3_like_count++;
#endif
    
................................................................................
*/
static void zeroblobFunc(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  i64 n;

  assert( argc==1 );
  UNUSED_PARAMETER(argc);
  n = sqlite3_value_int64(argv[0]);
  if( n>SQLITE_MAX_LENGTH ){


    sqlite3_result_error_toobig(context);
  }else{
    sqlite3_result_zeroblob(context, (int)n);
  }
}

/*
................................................................................
  for(i=j=0; i<=loopLimit; i++){
    if( zStr[i]!=zPattern[0] || memcmp(&zStr[i], zPattern, nPattern) ){
      zOut[j++] = zStr[i];
    }else{
      u8 *zOld;
      sqlite3 *db = sqlite3_context_db_handle(context);
      nOut += nRep - nPattern;


      if( nOut>=db->aLimit[SQLITE_LIMIT_LENGTH] ){
        sqlite3_result_error_toobig(context);
        sqlite3DbFree(db, zOut);
        return;
      }
      zOld = zOut;
      zOut = sqlite3_realloc(zOut, (int)nOut);
      if( zOut==0 ){
................................................................................
  if( nChar>0 ){
    flags = SQLITE_PTR_TO_INT(sqlite3_user_data(context));
    if( flags & 1 ){
      while( nIn>0 ){
        int len = 0;
        for(i=0; i<nChar; i++){
          len = aLen[i];
          if( memcmp(zIn, azChar[i], len)==0 ) break;
        }
        if( i>=nChar ) break;
        zIn += len;
        nIn -= len;
      }
    }
    if( flags & 2 ){
................................................................................
*/
static void countStep(sqlite3_context *context, int argc, sqlite3_value **argv){
  CountCtx *p;
  p = sqlite3_aggregate_context(context, sizeof(*p));
  if( (argc==0 || SQLITE_NULL!=sqlite3_value_type(argv[0])) && p ){
    p->n++;
  }









}   
static void countFinalize(sqlite3_context *context){
  CountCtx *p;
  p = sqlite3_aggregate_context(context, 0);
  sqlite3_result_int64(context, p ? p->n : 0);
}

................................................................................
    sqlite3VdbeMemCopy(pBest, pArg);
  }
}
static void minMaxFinalize(sqlite3_context *context){
  sqlite3_value *pRes;
  pRes = (sqlite3_value *)sqlite3_aggregate_context(context, 0);
  if( pRes ){
    if( pRes->flags ){
      sqlite3_result_value(context, pRes);
    }
    sqlite3VdbeMemRelease(pRes);
  }
}

/*
................................................................................
  int nVal, nSep;
  assert( argc==1 || argc==2 );
  if( sqlite3_value_type(argv[0])==SQLITE_NULL ) return;
  pAccum = (StrAccum*)sqlite3_aggregate_context(context, sizeof(*pAccum));

  if( pAccum ){
    sqlite3 *db = sqlite3_context_db_handle(context);

    pAccum->useMalloc = 1;
    pAccum->mxAlloc = db->aLimit[SQLITE_LIMIT_LENGTH];
    if( pAccum->nChar ){






      if( argc==2 ){
        zSep = (char*)sqlite3_value_text(argv[1]);
        nSep = sqlite3_value_bytes(argv[1]);
      }else{
        zSep = ",";
        nSep = 1;
      }
................................................................................
/*
** Set the LIKEOPT flag on the 2-argument function with the given name.
*/
static void setLikeOptFlag(sqlite3 *db, const char *zName, u8 flagVal){
  FuncDef *pDef;
  pDef = sqlite3FindFunction(db, zName, sqlite3Strlen30(zName),
                             2, SQLITE_UTF8, 0);
  if( pDef ){
    pDef->flags = flagVal;
  }
}

/*
** Register the built-in LIKE and GLOB functions.  The caseSensitive
** parameter determines whether or not the LIKE operator is case
................................................................................
   || pExpr->x.pList->nExpr!=2
  ){
    return 0;
  }
  assert( !ExprHasProperty(pExpr, EP_xIsSelect) );
  pDef = sqlite3FindFunction(db, (char*)pExpr->token.z, pExpr->token.n, 2,
                             SQLITE_UTF8, 0);
  if( pDef==0 || (pDef->flags & SQLITE_FUNC_LIKE)==0 ){
    return 0;
  }

  /* The memcpy() statement assumes that the wildcard characters are
  ** the first three statements in the compareInfo structure.  The
  ** asserts() that follow verify that assumption
  */
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.260 2009/02/28 10:47:42 danielk1977 Exp $
*/





















/*
** Set P4 of the most recently inserted opcode to a column affinity
** string for index pIdx. A column affinity string has one character
** for each column in the table, according to the affinity of the column:
**
**  Character      Column affinity
................................................................................
    goto insert_cleanup;
  }

  /* Locate the table into which we will be inserting new information.
  */
  assert( pTabList->nSrc==1 );
  zTab = pTabList->a[0].zName;
  if( zTab==0 ) goto insert_cleanup;
  pTab = sqlite3SrcListLookup(pParse, pTabList);
  if( pTab==0 ){
    goto insert_cleanup;
  }
  iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
  assert( iDb<db->nDb );
  pDb = &db->aDb[iDb];
................................................................................
    addrSelect = sqlite3VdbeCurrentAddr(v)+2;
    sqlite3VdbeAddOp2(v, OP_Integer, addrSelect-1, dest.iParm);
    j1 = sqlite3VdbeAddOp2(v, OP_Goto, 0, 0);
    VdbeComment((v, "Jump over SELECT coroutine"));

    /* Resolve the expressions in the SELECT statement and execute it. */
    rc = sqlite3Select(pParse, pSelect, &dest);

    if( rc || pParse->nErr || db->mallocFailed ){
      goto insert_cleanup;
    }
    sqlite3VdbeAddOp2(v, OP_Integer, 1, regEof);         /* EOF <- 1 */
    sqlite3VdbeAddOp1(v, OP_Yield, dest.iParm);   /* yield X */
    sqlite3VdbeAddOp2(v, OP_Halt, SQLITE_INTERNAL, OE_Abort);
    VdbeComment((v, "End of SELECT coroutine"));
    sqlite3VdbeJumpHere(v, j1);                          /* label B: */
................................................................................
    for(i=0; i<pTab->nCol; i++){
      nHidden += (IsHiddenColumn(&pTab->aCol[i]) ? 1 : 0);
    }
  }
  if( pColumn==0 && nColumn && nColumn!=(pTab->nCol-nHidden) ){
    sqlite3ErrorMsg(pParse, 
       "table %S has %d columns but %d values were supplied",
       pTabList, 0, pTab->nCol, nColumn);
    goto insert_cleanup;
  }
  if( pColumn!=0 && nColumn!=pColumn->nId ){
    sqlite3ErrorMsg(pParse, "%d values for %d columns", nColumn, pColumn->nId);
    goto insert_cleanup;
  }

................................................................................
    ** translated into a unique ID for the row.  But on a BEFORE trigger,
    ** we do not know what the unique ID will be (because the insert has
    ** not happened yet) so we substitute a rowid of -1
    */
    regTrigRowid = sqlite3GetTempReg(pParse);
    if( keyColumn<0 ){
      sqlite3VdbeAddOp2(v, OP_Integer, -1, regTrigRowid);


    }else if( useTempTable ){
      sqlite3VdbeAddOp3(v, OP_Column, srcTab, keyColumn, regTrigRowid);
    }else{
      int j1;
      assert( pSelect==0 );  /* Otherwise useTempTable is true */
      sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr, regTrigRowid);

      j1 = sqlite3VdbeAddOp1(v, OP_NotNull, regTrigRowid);
      sqlite3VdbeAddOp2(v, OP_Integer, -1, regTrigRowid);
      sqlite3VdbeJumpHere(v, j1);
      sqlite3VdbeAddOp1(v, OP_MustBeInt, regTrigRowid);
    }

    /* Cannot have triggers on a virtual table. If it were possible,
................................................................................
        sqlite3VdbeAddOp3(v, OP_Column, srcTab, keyColumn, regRowid);
      }else if( pSelect ){
        sqlite3VdbeAddOp2(v, OP_SCopy, regFromSelect+keyColumn, regRowid);
      }else{
        VdbeOp *pOp;
        sqlite3ExprCode(pParse, pList->a[keyColumn].pExpr, regRowid);
        pOp = sqlite3VdbeGetOp(v, sqlite3VdbeCurrentAddr(v) - 1);
        if( pOp && pOp->opcode==OP_Null && !IsVirtual(pTab) ){
          appendFlag = 1;
          pOp->opcode = OP_NewRowid;
          pOp->p1 = baseCur;
          pOp->p2 = regRowid;
          pOp->p3 = regAutoinc;
        }
      }
................................................................................
    if( IsVirtual(pTab) ){
      sqlite3VtabMakeWritable(pParse, pTab);
      sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, regIns,
                     (const char*)pTab->pVtab, P4_VTAB);
    }else
#endif
    {

      sqlite3GenerateConstraintChecks(
          pParse,
          pTab,
          baseCur,
          regIns,
          aRegIdx,
          keyColumn>=0,
          0,
          onError,
          endOfLoop
      );
      sqlite3CompleteInsertion(
          pParse,
          pTab,
          baseCur,
          regIns,
          aRegIdx,
          0,

          (tmask&TRIGGER_AFTER) ? newIdx : -1,
          appendFlag
       );
    }
  }

  /* Update the count of rows that are inserted
  */
  if( (db->flags & SQLITE_CountRows)!=0 ){
    sqlite3VdbeAddOp2(v, OP_AddImm, regRowCount, 1);
................................................................................
  Table *pTab,        /* the table into which we are inserting */
  int baseCur,        /* Index of a read/write cursor pointing at pTab */
  int regRowid,       /* Index of the range of input registers */
  int *aRegIdx,       /* Register used by each index.  0 for unused indices */
  int rowidChng,      /* True if the rowid might collide with existing entry */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int overrideError,  /* Override onError to this if not OE_Default */
  int ignoreDest      /* Jump to this label on an OE_Ignore resolution */

){
  int i;
  Vdbe *v;
  int nCol;

  int onError;
  int j1;             /* Addresss of jump instruction */
  int j2 = 0, j3;     /* Addresses of jump instructions */
  int regData;        /* Register containing first data column */
  int iCur;
  Index *pIdx;
  int seenReplace = 0;
  int hasTwoRowids = (isUpdate && rowidChng);

  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  nCol = pTab->nCol;
  regData = regRowid + 1;
................................................................................
        sqlite3VdbeChangeP4(v, -1, zMsg, P4_DYNAMIC);
        break;
      }
      case OE_Ignore: {
        sqlite3VdbeAddOp2(v, OP_IsNull, regData+i, ignoreDest);
        break;
      }

      case OE_Replace: {
        j1 = sqlite3VdbeAddOp1(v, OP_NotNull, regData+i);
        sqlite3ExprCode(pParse, pTab->aCol[i].pDflt, regData+i);
        sqlite3VdbeJumpHere(v, j1);
        break;
      }
    }
  }
................................................................................
        sqlite3VdbeAddOp2(v, OP_SCopy, regData+idx, regIdx+i);
      }
    }
    sqlite3VdbeAddOp2(v, OP_SCopy, regRowid, regIdx+i);
    sqlite3VdbeAddOp3(v, OP_MakeRecord, regIdx, pIdx->nColumn+1, aRegIdx[iCur]);
    sqlite3IndexAffinityStr(v, pIdx);
    sqlite3ExprCacheAffinityChange(pParse, regIdx, pIdx->nColumn+1);
    sqlite3ReleaseTempRange(pParse, regIdx, pIdx->nColumn+1);

    /* Find out what action to take in case there is an indexing conflict */
    onError = pIdx->onError;


    if( onError==OE_None ) continue;  /* pIdx is not a UNIQUE index */

    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    if( seenReplace ){
      if( onError==OE_Ignore ) onError = OE_Replace;
      else if( onError==OE_Fail ) onError = OE_Abort;
    }
    

    /* Check to see if the new index entry will be unique */
    j2 = sqlite3VdbeAddOp3(v, OP_IsNull, regIdx, 0, pIdx->nColumn);
    regR = sqlite3GetTempReg(pParse);
    sqlite3VdbeAddOp2(v, OP_SCopy, regRowid-hasTwoRowids, regR);
    j3 = sqlite3VdbeAddOp4(v, OP_IsUnique, baseCur+iCur+1, 0,
                           regR, SQLITE_INT_TO_PTR(aRegIdx[iCur]),
                           P4_INT32);


    /* Generate code that executes if the new index entry is not unique */
    assert( onError==OE_Rollback || onError==OE_Abort || onError==OE_Fail
        || onError==OE_Ignore || onError==OE_Replace );
    switch( onError ){
      case OE_Rollback:
      case OE_Abort:
      case OE_Fail: {
        int j, n1, n2;
        char zErrMsg[200];
        sqlite3_snprintf(ArraySize(zErrMsg), zErrMsg,
                         pIdx->nColumn>1 ? "columns " : "column ");
        n1 = sqlite3Strlen30(zErrMsg);
        for(j=0; j<pIdx->nColumn && n1<ArraySize(zErrMsg)-30; j++){
          char *zCol = pTab->aCol[pIdx->aiColumn[j]].zName;
          n2 = sqlite3Strlen30(zCol);
          if( j>0 ){
            sqlite3_snprintf(ArraySize(zErrMsg)-n1, &zErrMsg[n1], ", ");
            n1 += 2;
          }
          if( n1+n2>ArraySize(zErrMsg)-30 ){
            sqlite3_snprintf(ArraySize(zErrMsg)-n1, &zErrMsg[n1], "...");
            n1 += 3;
            break;
          }else{
            sqlite3_snprintf(ArraySize(zErrMsg)-n1, &zErrMsg[n1], "%s", zCol);
            n1 += n2;
          }
        }
        sqlite3_snprintf(ArraySize(zErrMsg)-n1, &zErrMsg[n1], 
            pIdx->nColumn>1 ? " are not unique" : " is not unique");
        sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, onError, 0, zErrMsg,0);
        break;
      }
      case OE_Ignore: {
        assert( seenReplace==0 );
        sqlite3VdbeAddOp2(v, OP_Goto, 0, ignoreDest);
        break;
      }

      case OE_Replace: {
        sqlite3GenerateRowDelete(pParse, pTab, baseCur, regR, 0);
        seenReplace = 1;
        break;
      }
    }
    sqlite3VdbeJumpHere(v, j2);
    sqlite3VdbeJumpHere(v, j3);
    sqlite3ReleaseTempReg(pParse, regR);
  }




}

/*
** This routine generates code to finish the INSERT or UPDATE operation
** that was started by a prior call to sqlite3GenerateConstraintChecks.
** A consecutive range of registers starting at regRowid contains the
** rowid and the content to be inserted.
................................................................................
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int baseCur,        /* Index of a read/write cursor pointing at pTab */
  int regRowid,       /* Range of content */
  int *aRegIdx,       /* Register used by each index.  0 for unused indices */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int newIdx,         /* Index of NEW table for triggers.  -1 if none */
  int appendBias      /* True if this is likely to be an append */

){
  int i;
  Vdbe *v;
  int nIdx;
  Index *pIdx;
  u8 pik_flags;
  int regData;
................................................................................
  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  for(nIdx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, nIdx++){}
  for(i=nIdx-1; i>=0; i--){
    if( aRegIdx[i]==0 ) continue;
    sqlite3VdbeAddOp2(v, OP_IdxInsert, baseCur+i+1, aRegIdx[i]);



  }
  regData = regRowid + 1;
  regRec = sqlite3GetTempReg(pParse);
  sqlite3VdbeAddOp3(v, OP_MakeRecord, regData, pTab->nCol, regRec);
  sqlite3TableAffinityStr(v, pTab);
  sqlite3ExprCacheAffinityChange(pParse, regData, pTab->nCol);
#ifndef SQLITE_OMIT_TRIGGER
................................................................................
  }else{
    pik_flags = OPFLAG_NCHANGE;
    pik_flags |= (isUpdate?OPFLAG_ISUPDATE:OPFLAG_LASTROWID);
  }
  if( appendBias ){
    pik_flags |= OPFLAG_APPEND;
  }



  sqlite3VdbeAddOp3(v, OP_Insert, baseCur, regRec, regRowid);
  if( !pParse->nested ){
    sqlite3VdbeChangeP4(v, -1, pTab->zName, P4_STATIC);
  }
  sqlite3VdbeChangeP5(v, pik_flags);
}

................................................................................
  for(i=1, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    KeyInfo *pKey = sqlite3IndexKeyinfo(pParse, pIdx);
    assert( pIdx->pSchema==pTab->pSchema );
    sqlite3VdbeAddOp4(v, op, i+baseCur, pIdx->tnum, iDb,
                      (char*)pKey, P4_KEYINFO_HANDOFF);
    VdbeComment((v, "%s", pIdx->zName));
  }
  if( pParse->nTab<=baseCur+i ){
    pParse->nTab = baseCur+i;
  }
  return i-1;
}


#ifdef SQLITE_TEST
................................................................................
  for(i=0; i<pSrc->nColumn; i++){
    if( pSrc->aiColumn[i]!=pDest->aiColumn[i] ){
      return 0;   /* Different columns indexed */
    }
    if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
      return 0;   /* Different sort orders */
    }
    if( pSrc->azColl[i]!=pDest->azColl[i] ){
      return 0;   /* Different collating sequences */
    }
  }

  /* If no test above fails then the indices must be compatible */
  return 1;
}
................................................................................
  sqlite3VdbeAddOp2(v, OP_RowData, iSrc, regData);
  sqlite3VdbeAddOp3(v, OP_Insert, iDest, regData, regRowid);
  sqlite3VdbeChangeP5(v, OPFLAG_NCHANGE|OPFLAG_LASTROWID|OPFLAG_APPEND);
  sqlite3VdbeChangeP4(v, -1, pDest->zName, 0);
  sqlite3VdbeAddOp2(v, OP_Next, iSrc, addr1);
  autoIncEnd(pParse, iDbDest, pDest, regAutoinc);
  for(pDestIdx=pDest->pIndex; pDestIdx; pDestIdx=pDestIdx->pNext){
    for(pSrcIdx=pSrc->pIndex; pSrcIdx; pSrcIdx=pSrcIdx->pNext){
      if( xferCompatibleIndex(pDestIdx, pSrcIdx) ) break;
    }
    assert( pSrcIdx );
    sqlite3VdbeAddOp2(v, OP_Close, iSrc, 0);
    sqlite3VdbeAddOp2(v, OP_Close, iDest, 0);
    pKey = sqlite3IndexKeyinfo(pParse, pSrcIdx);
    sqlite3VdbeAddOp4(v, OP_OpenRead, iSrc, pSrcIdx->tnum, iDbSrc,
................................................................................
**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: legacy.c,v 1.32 2009/03/19 18:51:07 danielk1977 Exp $
*/


/*
** Execute SQL code.  Return one of the SQLITE_ success/failure
** codes.  Also write an error message into memory obtained from
** malloc() and make *pzErrMsg point to that message.
................................................................................
SQLITE_API int sqlite3_exec(
  sqlite3 *db,                /* The database on which the SQL executes */
  const char *zSql,           /* The SQL to be executed */
  sqlite3_callback xCallback, /* Invoke this callback routine */
  void *pArg,                 /* First argument to xCallback() */
  char **pzErrMsg             /* Write error messages here */
){
  int rc = SQLITE_OK;
  const char *zLeftover;
  sqlite3_stmt *pStmt = 0;
  char **azCols = 0;

  int nRetry = 0;
  int nCallback;


  if( zSql==0 ) zSql = "";

  sqlite3_mutex_enter(db->mutex);
  sqlite3Error(db, SQLITE_OK, 0);
  while( (rc==SQLITE_OK || (rc==SQLITE_SCHEMA && (++nRetry)<2)) && zSql[0] ){
    int nCol;
................................................................................
    }
    if( !pStmt ){
      /* this happens for a comment or white-space */
      zSql = zLeftover;
      continue;
    }

    nCallback = 0;
    nCol = sqlite3_column_count(pStmt);

    while( 1 ){
      int i;
      rc = sqlite3_step(pStmt);

      /* Invoke the callback function if required */
      if( xCallback && (SQLITE_ROW==rc || 

          (SQLITE_DONE==rc && !nCallback && db->flags&SQLITE_NullCallback)) ){
        if( 0==nCallback ){
          if( azCols==0 ){
            azCols = sqlite3DbMallocZero(db, 2*nCol*sizeof(const char*) + 1);
            if( azCols==0 ){
              goto exec_out;
            }
          }
          for(i=0; i<nCol; i++){
            azCols[i] = (char *)sqlite3_column_name(pStmt, i);
            /* sqlite3VdbeSetColName() installs column names as UTF8
            ** strings so there is no way for sqlite3_column_name() to fail. */
            assert( azCols[i]!=0 );
          }
          nCallback++;
        }
        if( rc==SQLITE_ROW ){
          azVals = &azCols[nCol];
          for(i=0; i<nCol; i++){
            azVals[i] = (char *)sqlite3_column_text(pStmt, i);
            if( !azVals[i] && sqlite3_column_type(pStmt, i)!=SQLITE_NULL ){
              db->mallocFailed = 1;
................................................................................
  }

exec_out:
  if( pStmt ) sqlite3VdbeFinalize((Vdbe *)pStmt);
  sqlite3DbFree(db, azCols);

  rc = sqlite3ApiExit(db, rc);
  if( rc!=SQLITE_OK && rc==sqlite3_errcode(db) && pzErrMsg ){
    int nErrMsg = 1 + sqlite3Strlen30(sqlite3_errmsg(db));
    *pzErrMsg = sqlite3Malloc(nErrMsg);
    if( *pzErrMsg ){
      memcpy(*pzErrMsg, sqlite3_errmsg(db), nErrMsg);
    }
  }else if( pzErrMsg ){
    *pzErrMsg = 0;
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
**
** $Id: pragma.c,v 1.204 2009/02/23 16:52:08 drh Exp $
*/

/* Ignore this whole file if pragmas are disabled
*/
#if !defined(SQLITE_OMIT_PRAGMA) && !defined(SQLITE_OMIT_PARSER)

/*
................................................................................
  return SQLITE_OK;
}
#endif /* SQLITE_PAGER_PRAGMAS */

/*
** Generate code to return a single integer value.
*/
static void returnSingleInt(Parse *pParse, const char *zLabel, int value){
  Vdbe *v = sqlite3GetVdbe(pParse);
  int mem = ++pParse->nMem;
  sqlite3VdbeAddOp2(v, OP_Integer, value, mem);
  if( pParse->explain==0 ){



    sqlite3VdbeSetNumCols(v, 1);
    sqlite3VdbeSetColName(v, 0, COLNAME_NAME, zLabel, SQLITE_STATIC);
  }
  sqlite3VdbeAddOp2(v, OP_ResultRow, mem, 1);
}

#ifndef SQLITE_OMIT_FLAG_PRAGMAS
/*
** Check to see if zRight and zLeft refer to a pragma that queries
** or changes one of the flags in db->flags.  Return 1 if so and 0 if not.
................................................................................
      int size = ALWAYS(pBt) ? sqlite3BtreeGetPageSize(pBt) : 0;
      returnSingleInt(pParse, "page_size", size);
    }else{
      /* Malloc may fail when setting the page-size, as there is an internal
      ** buffer that the pager module resizes using sqlite3_realloc().
      */
      db->nextPagesize = atoi(zRight);
      if( SQLITE_NOMEM==sqlite3BtreeSetPageSize(pBt, db->nextPagesize, -1) ){
        db->mallocFailed = 1;
      }
    }
  }else

  /*
  **  PRAGMA [database.]max_page_count
................................................................................
  **
  ** Get or set the size limit on rollback journal files.
  */
  if( sqlite3StrICmp(zLeft,"journal_size_limit")==0 ){
    Pager *pPager = sqlite3BtreePager(pDb->pBt);
    i64 iLimit = -2;
    if( zRight ){
      int iLimit32 = atoi(zRight);
      if( iLimit32<-1 ){
        iLimit32 = -1;
      }
      iLimit = iLimit32;
    }
    iLimit = sqlite3PagerJournalSizeLimit(pPager, iLimit);
    returnSingleInt(pParse, "journal_size_limit", (int)iLimit);
  }else

#endif /* SQLITE_OMIT_PAGER_PRAGMAS */

  /*
  **  PRAGMA [database.]auto_vacuum
  **  PRAGMA [database.]auto_vacuum=N
................................................................................
        sqlite3VdbeAddOp2(v, OP_Integer, pTab->tnum, 2+cnt);
        cnt++;
        for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
          sqlite3VdbeAddOp2(v, OP_Integer, pIdx->tnum, 2+cnt);
          cnt++;
        }
      }
      if( cnt==0 ) continue;

      /* Make sure sufficient number of registers have been allocated */
      if( pParse->nMem < cnt+4 ){
        pParse->nMem = cnt+4;
      }

      /* Do the b-tree integrity checks */
................................................................................
             { OP_Eq,           2,  0,  3},  /* 4 */
             { OP_AddImm,       1, -1,  0},
             { OP_String8,      0,  2,  0},  /* 6 */
             { OP_String8,      0,  3,  0},  /* 7 */
             { OP_Concat,       3,  2,  2},
             { OP_ResultRow,    2,  1,  0},
          };
          if( pIdx->tnum==0 ) continue;
          addr = sqlite3VdbeAddOp1(v, OP_IfPos, 1);
          sqlite3VdbeAddOp2(v, OP_Halt, 0, 0);
          sqlite3VdbeJumpHere(v, addr);
          addr = sqlite3VdbeAddOpList(v, ArraySize(cntIdx), cntIdx);
          sqlite3VdbeChangeP1(v, addr+1, j+2);
          sqlite3VdbeChangeP2(v, addr+1, addr+4);
          sqlite3VdbeChangeP1(v, addr+3, j+2);
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains the implementation of the sqlite3_prepare()
** interface, and routines that contribute to loading the database schema
** from disk.
**
** $Id: prepare.c,v 1.114 2009/03/24 15:08:10 drh Exp $
*/

/*
** Fill the InitData structure with an error message that indicates
** that the database is corrupt.
*/
static void corruptSchema(
................................................................................
** database file is given by iDb.  iDb==0 is used for the main
** database.  iDb==1 should never be used.  iDb>=2 is used for
** auxiliary databases.  Return one of the SQLITE_ error codes to
** indicate success or failure.
*/
static int sqlite3InitOne(sqlite3 *db, int iDb, char **pzErrMsg){
  int rc;

  BtCursor *curMain;
  int size;
  Table *pTab;
  Db *pDb;
  char const *azArg[4];
  int meta[10];
  InitData initData;
................................................................................
  curMain = sqlite3MallocZero(sqlite3BtreeCursorSize());
  if( !curMain ){
    rc = SQLITE_NOMEM;
    goto error_out;
  }
  sqlite3BtreeEnter(pDb->pBt);
  rc = sqlite3BtreeCursor(pDb->pBt, MASTER_ROOT, 0, 0, curMain);

  if( rc!=SQLITE_OK && rc!=SQLITE_EMPTY ){
    sqlite3SetString(pzErrMsg, db, "%s", sqlite3ErrStr(rc));
    goto initone_error_out;
  }

  /* Get the database meta information.
  **
  ** Meta values are as follows:
................................................................................
  **    meta[7]
  **    meta[8]
  **    meta[9]
  **
  ** Note: The #defined SQLITE_UTF* symbols in sqliteInt.h correspond to
  ** the possible values of meta[4].
  */
  if( rc==SQLITE_OK ){
    int i;
    for(i=0; i<ArraySize(meta); i++){
      rc = sqlite3BtreeGetMeta(pDb->pBt, i+1, (u32 *)&meta[i]);
      if( rc ){
        sqlite3SetString(pzErrMsg, db, "%s", sqlite3ErrStr(rc));
        goto initone_error_out;
      }
    }
  }else{
    memset(meta, 0, sizeof(meta));
  }
  pDb->pSchema->schema_cookie = meta[0];

  /* If opening a non-empty database, check the text encoding. For the
  ** main database, set sqlite3.enc to the encoding of the main database.
  ** For an attached db, it is an error if the encoding is not the same
  ** as sqlite3.enc.
................................................................................
  const char **pzTail       /* OUT: End of parsed string */
){
  Parse sParse;
  char *zErrMsg = 0;
  int rc = SQLITE_OK;
  int i;

  assert( ppStmt );
  *ppStmt = 0;
  if( sqlite3SafetyOn(db) ){
    return SQLITE_MISUSE;
  }

  assert( !db->mallocFailed );
  assert( sqlite3_mutex_held(db->mutex) );

  /* Check to verify that it is possible to get a read lock on all
  ** database schemas.  The inability to get a read lock indicates that
  ** some other database connection is holding a write-lock, which in
  ** turn means that the other connection has made uncommitted changes
................................................................................
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  int saveSqlFlag,          /* True to copy SQL text into the sqlite3_stmt */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  int rc;


  if( !sqlite3SafetyCheckOk(db) ){
    return SQLITE_MISUSE;
  }
  sqlite3_mutex_enter(db->mutex);
  sqlite3BtreeEnterAll(db);
  rc = sqlite3Prepare(db, zSql, nBytes, saveSqlFlag, ppStmt, pzTail);
  sqlite3BtreeLeaveAll(db);
................................................................................
  ** encoded string to UTF-8, then invoking sqlite3_prepare(). The
  ** tricky bit is figuring out the pointer to return in *pzTail.
  */
  char *zSql8;
  const char *zTail8 = 0;
  int rc = SQLITE_OK;



  if( !sqlite3SafetyCheckOk(db) ){
    return SQLITE_MISUSE;
  }
  sqlite3_mutex_enter(db->mutex);
  zSql8 = sqlite3Utf16to8(db, zSql, nBytes);
  if( zSql8 ){
    rc = sqlite3LockAndPrepare(db, zSql8, -1, saveSqlFlag, ppStmt, &zTail8);
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.506 2009/03/31 03:41:57 shane Exp $
*/


/*
** Delete all the content of a Select structure but do not deallocate
** the select structure itself.
*/
................................................................................
/*
** Set the value of a token to a '\000'-terminated string.
*/
static void setToken(Token *p, const char *z){
  p->z = (u8*)z;
  p->n = z ? sqlite3Strlen30(z) : 0;
  p->dyn = 0;
}

/*
** Set the token to the double-quoted and escaped version of the string pointed
** to by z. For example;
**
**    {a"bc}  ->  {"a""bc"}
*/
static void setQuotedToken(Parse *pParse, Token *p, const char *z){

  /* Check if the string appears to be quoted using "..." or `...`
  ** or [...] or '...' or if the string contains any " characters.  
  ** If it does, then record a version of the string with the special
  ** characters escaped.
  */
  const char *z2 = z;
  if( *z2!='[' && *z2!='`' && *z2!='\'' ){
    while( *z2 ){
      if( *z2=='"' ) break;
      z2++;
    }
  }

  if( *z2 ){
    /* String contains " characters - copy and quote the string. */
    p->z = (u8 *)sqlite3MPrintf(pParse->db, "\"%w\"", z);
    if( p->z ){
      p->n = sqlite3Strlen30((char *)p->z);
      p->dyn = 1;
    }
  }else{
    /* String contains no " characters - copy the pointer. */
    p->z = (u8*)z;
    p->n = (int)(z2 - z);
    p->dyn = 0;
  }
}

/*
** Create an expression node for an identifier with the name of zName
*/
SQLITE_PRIVATE Expr *sqlite3CreateIdExpr(Parse *pParse, const char *zName){
  Token dummy;
................................................................................
  Select *pSelect,       /* The whole SELECT statement */
  int regData            /* Register holding data to be sorted */
){
  Vdbe *v = pParse->pVdbe;
  int nExpr = pOrderBy->nExpr;
  int regBase = sqlite3GetTempRange(pParse, nExpr+2);
  int regRecord = sqlite3GetTempReg(pParse);

  sqlite3ExprCodeExprList(pParse, pOrderBy, regBase, 0);
  sqlite3VdbeAddOp2(v, OP_Sequence, pOrderBy->iECursor, regBase+nExpr);
  sqlite3ExprCodeMove(pParse, regData, regBase+nExpr+1, 1);
  sqlite3VdbeAddOp3(v, OP_MakeRecord, regBase, nExpr + 2, regRecord);
  sqlite3VdbeAddOp2(v, OP_IdxInsert, pOrderBy->iECursor, regRecord);
  sqlite3ReleaseTempReg(pParse, regRecord);
  sqlite3ReleaseTempRange(pParse, regBase, nExpr+2);
................................................................................
    for(i=0; i<nColumn; i++){
      sqlite3VdbeAddOp3(v, OP_Column, srcTab, i, regResult+i);
    }
  }else if( eDest!=SRT_Exists ){
    /* If the destination is an EXISTS(...) expression, the actual
    ** values returned by the SELECT are not required.
    */

    sqlite3ExprCodeExprList(pParse, pEList, regResult, eDest==SRT_Output);
  }
  nColumn = nResultCol;

  /* If the DISTINCT keyword was present on the SELECT statement
  ** and this row has been seen before, then do not make this row
  ** part of the result.
................................................................................
        zName = sqlite3MPrintf(db, "%T", pToken);
      }
    }
    if( db->mallocFailed ){
      sqlite3DbFree(db, zName);
      break;
    }
    sqlite3Dequote(zName);

    /* Make sure the column name is unique.  If the name is not unique,
    ** append a integer to the name so that it becomes unique.
    */
    nName = sqlite3Strlen30(zName);
    for(j=cnt=0; j<i; j++){
      if( sqlite3StrICmp(aCol[j].zName, zName)==0 ){
................................................................................

  /* 
  ** "LIMIT -1" always shows all rows.  There is some
  ** contraversy about what the correct behavior should be.
  ** The current implementation interprets "LIMIT 0" to mean
  ** no rows.
  */

  if( p->pLimit ){
    p->iLimit = iLimit = ++pParse->nMem;
    v = sqlite3GetVdbe(pParse);
    if( v==0 ) return;
    sqlite3ExprCode(pParse, p->pLimit, iLimit);
    sqlite3VdbeAddOp1(v, OP_MustBeInt, iLimit);
    VdbeComment((v, "LIMIT counter"));
................................................................................
static CollSeq *multiSelectCollSeq(Parse *pParse, Select *p, int iCol){
  CollSeq *pRet;
  if( p->pPrior ){
    pRet = multiSelectCollSeq(pParse, p->pPrior, iCol);
  }else{
    pRet = 0;
  }

  if( pRet==0 ){
    pRet = sqlite3ExprCollSeq(pParse, p->pEList->a[iCol].pExpr);
  }
  return pRet;
}
#endif /* SQLITE_OMIT_COMPOUND_SELECT */

/* Forward reference */
................................................................................
        pOrderBy = sqlite3ExprListAppend(pParse, pOrderBy, pNew, 0);
        pOrderBy->a[nOrderBy++].iCol = (u16)i;
      }
    }
  }

  /* Compute the comparison permutation and keyinfo that is used with
  ** the permutation in order to comparisons to determine if the next
  ** row of results comes from selectA or selectB.  Also add explicit
  ** collations to the ORDER BY clause terms so that when the subqueries
  ** to the right and the left are evaluated, they use the correct
  ** collation.
  */
  aPermute = sqlite3DbMallocRaw(db, sizeof(int)*nOrderBy);
  if( aPermute ){
................................................................................
**
**  (18)  If the sub-query is a compound select, then all terms of the
**        ORDER by clause of the parent must be simple references to 
**        columns of the sub-query.
**
**  (19)  The subquery does not use LIMIT or the outer query does not
**        have a WHERE clause.






**
** In this routine, the "p" parameter is a pointer to the outer query.
** The subquery is p->pSrc->a[iFrom].  isAgg is true if the outer query
** uses aggregates and subqueryIsAgg is true if the subquery uses aggregates.
**
** If flattening is not attempted, this routine is a no-op and returns 0.
** If flattening is attempted this routine returns 1.
................................................................................

  /* Restriction 17: If the sub-query is a compound SELECT, then it must
  ** use only the UNION ALL operator. And none of the simple select queries
  ** that make up the compound SELECT are allowed to be aggregate or distinct
  ** queries.
  */
  if( pSub->pPrior ){



    if( isAgg || (p->selFlags & SF_Distinct)!=0 || pSrc->nSrc!=1 ){
      return 0;
    }
    for(pSub1=pSub; pSub1; pSub1=pSub1->pPrior){
      if( (pSub1->selFlags & (SF_Distinct|SF_Aggregate))!=0
       || (pSub1->pPrior && pSub1->op!=TK_ALL) 
       || !pSub1->pSrc || pSub1->pSrc->nSrc!=1
................................................................................
                /* In a join with a USING clause, omit columns in the
                ** using clause from the table on the right. */
                continue;
              }
            }
            pRight = sqlite3PExpr(pParse, TK_ID, 0, 0, 0);
            if( pRight==0 ) break;
            setQuotedToken(pParse, &pRight->token, zName);
            if( longNames || pTabList->nSrc>1 ){
              Expr *pLeft = sqlite3PExpr(pParse, TK_ID, 0, 0, 0);
              pExpr = sqlite3PExpr(pParse, TK_DOT, pLeft, pRight, 0);
              if( pExpr==0 ) break;
              setQuotedToken(pParse, &pLeft->token, zTabName);
              setToken(&pExpr->span, 
                  sqlite3MPrintf(db, "%s.%s", zTabName, zName));
              pExpr->span.dyn = 1;
              pExpr->token.z = 0;
              pExpr->token.n = 0;
              pExpr->token.dyn = 0;
            }else{
................................................................................
static void updateAccumulator(Parse *pParse, AggInfo *pAggInfo){
  Vdbe *v = pParse->pVdbe;
  int i;
  struct AggInfo_func *pF;
  struct AggInfo_col *pC;

  pAggInfo->directMode = 1;

  for(i=0, pF=pAggInfo->aFunc; i<pAggInfo->nFunc; i++, pF++){
    int nArg;
    int addrNext = 0;
    int regAgg;
    ExprList *pList = pF->pExpr->x.pList;
    assert( !ExprHasProperty(pF->pExpr, EP_xIsSelect) );
    if( pList ){
................................................................................
    sqlite3VdbeAddOp4(v, OP_AggStep, 0, regAgg, pF->iMem,
                      (void*)pF->pFunc, P4_FUNCDEF);
    sqlite3VdbeChangeP5(v, (u8)nArg);
    sqlite3ReleaseTempRange(pParse, regAgg, nArg);
    sqlite3ExprCacheAffinityChange(pParse, regAgg, nArg);
    if( addrNext ){
      sqlite3VdbeResolveLabel(v, addrNext);

    }
  }
  for(i=0, pC=pAggInfo->aCol; i<pAggInfo->nAccumulator; i++, pC++){
    sqlite3ExprCode(pParse, pC->pExpr, pC->iMem);
  }
  pAggInfo->directMode = 0;

}

/*
** Generate code for the SELECT statement given in the p argument.  
**
** The results are distributed in various ways depending on the
** contents of the SelectDest structure pointed to by argument pDest
................................................................................
  }

  /* Aggregate and non-aggregate queries are handled differently */
  if( !isAgg && pGroupBy==0 ){
    /* This case is for non-aggregate queries
    ** Begin the database scan
    */
    pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pOrderBy, 0, 0);
    if( pWInfo==0 ) goto select_end;

    /* If sorting index that was created by a prior OP_OpenEphemeral 
    ** instruction ended up not being needed, then change the OP_OpenEphemeral
    ** into an OP_Noop.
    */
    if( addrSortIndex>=0 && pOrderBy==0 ){
................................................................................

      /* Begin a loop that will extract all source rows in GROUP BY order.
      ** This might involve two separate loops with an OP_Sort in between, or
      ** it might be a single loop that uses an index to extract information
      ** in the right order to begin with.
      */
      sqlite3VdbeAddOp2(v, OP_Gosub, regReset, addrReset);
      pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pGroupBy, 0, 0);
      if( pWInfo==0 ) goto select_end;
      if( pGroupBy==0 ){
        /* The optimizer is able to deliver rows in group by order so
        ** we do not have to sort.  The OP_OpenEphemeral table will be
        ** cancelled later because we still need to use the pKeyInfo
        */
        pGroupBy = p->pGroupBy;
................................................................................
        for(i=0; i<sAggInfo.nColumn; i++){
          if( sAggInfo.aCol[i].iSorterColumn>=j ){
            nCol++;
            j++;
          }
        }
        regBase = sqlite3GetTempRange(pParse, nCol);

        sqlite3ExprCodeExprList(pParse, pGroupBy, regBase, 0);
        sqlite3VdbeAddOp2(v, OP_Sequence, sAggInfo.sortingIdx,regBase+nGroupBy);
        j = nGroupBy+1;
        for(i=0; i<sAggInfo.nColumn; i++){
          struct AggInfo_col *pCol = &sAggInfo.aCol[i];
          if( pCol->iSorterColumn>=j ){
            int r1 = j + regBase;
................................................................................
        sqlite3VdbeAddOp2(v, OP_IdxInsert, sAggInfo.sortingIdx, regRecord);
        sqlite3ReleaseTempReg(pParse, regRecord);
        sqlite3ReleaseTempRange(pParse, regBase, nCol);
        sqlite3WhereEnd(pWInfo);
        sqlite3VdbeAddOp2(v, OP_Sort, sAggInfo.sortingIdx, addrEnd);
        VdbeComment((v, "GROUP BY sort"));
        sAggInfo.useSortingIdx = 1;

      }

      /* Evaluate the current GROUP BY terms and store in b0, b1, b2...
      ** (b0 is memory location iBMem+0, b1 is iBMem+1, and so forth)
      ** Then compare the current GROUP BY terms against the GROUP BY terms
      ** from the previous row currently stored in a0, a1, a2...
      */
      addrTopOfLoop = sqlite3VdbeCurrentAddr(v);

      for(j=0; j<pGroupBy->nExpr; j++){
        if( groupBySort ){
          sqlite3VdbeAddOp3(v, OP_Column, sAggInfo.sortingIdx, j, iBMem+j);
        }else{
          sAggInfo.directMode = 1;
          sqlite3ExprCode(pParse, pGroupBy->a[j].pExpr, iBMem+j);
        }
................................................................................
        }
  
        /* This case runs if the aggregate has no GROUP BY clause.  The
        ** processing is much simpler since there is only a single row
        ** of output.
        */
        resetAccumulator(pParse, &sAggInfo);
        pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, &pMinMax, flag, 0);
        if( pWInfo==0 ){
          sqlite3ExprListDelete(db, pDel);
          goto select_end;
        }
        updateAccumulator(pParse, &sAggInfo);
        if( !pMinMax && flag ){
          sqlite3VdbeAddOp2(v, OP_Goto, 0, pWInfo->iBreak);
................................................................................
** This file contains the sqlite3_get_table() and sqlite3_free_table()
** interface routines.  These are just wrappers around the main
** interface routine of sqlite3_exec().
**
** These routines are in a separate files so that they will not be linked
** if they are not used.
**
** $Id: table.c,v 1.39 2009/01/19 20:49:10 drh Exp $
*/

#ifndef SQLITE_OMIT_GET_TABLE

/*
** This structure is used to pass data from sqlite3_get_table() through
** to the callback function is uses to build the result.
*/
typedef struct TabResult {
  char **azResult;
  char *zErrMsg;
  int nResult;
  int nAlloc;
  int nRow;
  int nColumn;
  int nData;
  int rc;
} TabResult;

/*
** This routine is called once for each row in the result table.  Its job
** is to fill in the TabResult structure appropriately, allocating new
** memory as necessary.
*/
static int sqlite3_get_table_cb(void *pArg, int nCol, char **argv, char **colv){
  TabResult *p = (TabResult*)pArg;
  int need;
  int i;
  char *z;

  /* Make sure there is enough space in p->azResult to hold everything
  ** we need to remember from this invocation of the callback.
  */
  if( p->nRow==0 && argv!=0 ){
    need = nCol*2;
  }else{
    need = nCol;
  }
  if( p->nData + need >= p->nAlloc ){
    char **azNew;
    p->nAlloc = p->nAlloc*2 + need + 1;
    azNew = sqlite3_realloc( p->azResult, sizeof(char*)*p->nAlloc );
    if( azNew==0 ) goto malloc_failed;
    p->azResult = azNew;
  }

  /* If this is the first row, then generate an extra row containing
  ** the names of all columns.
................................................................................
  TabResult res;

  *pazResult = 0;
  if( pnColumn ) *pnColumn = 0;
  if( pnRow ) *pnRow = 0;
  if( pzErrMsg ) *pzErrMsg = 0;
  res.zErrMsg = 0;
  res.nResult = 0;
  res.nRow = 0;
  res.nColumn = 0;
  res.nData = 1;
  res.nAlloc = 20;
  res.rc = SQLITE_OK;
  res.azResult = sqlite3_malloc(sizeof(char*)*res.nAlloc );
  if( res.azResult==0 ){
................................................................................
  sqlite3_free(res.zErrMsg);
  if( rc!=SQLITE_OK ){
    sqlite3_free_table(&res.azResult[1]);
    return rc;
  }
  if( res.nAlloc>res.nData ){
    char **azNew;
    azNew = sqlite3_realloc( res.azResult, sizeof(char*)*(res.nData+1) );
    if( azNew==0 ){
      sqlite3_free_table(&res.azResult[1]);
      db->errCode = SQLITE_NOMEM;
      return SQLITE_NOMEM;
    }
    res.nAlloc = res.nData+1;
    res.azResult = azNew;
  }
  *pazResult = &res.azResult[1];
  if( pnColumn ) *pnColumn = res.nColumn;
  if( pnRow ) *pnRow = res.nRow;
  return rc;
}
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
**
** $Id: trigger.c,v 1.135 2009/02/28 10:47:42 danielk1977 Exp $
*/

#ifndef SQLITE_OMIT_TRIGGER
/*
** Delete a linked list of TriggerStep structures.
*/
SQLITE_PRIVATE void sqlite3DeleteTriggerStep(sqlite3 *db, TriggerStep *pTriggerStep){
................................................................................
    Trigger *pLink = pTrig;
    Hash *pHash = &db->aDb[iDb].pSchema->trigHash;
    pTrig = sqlite3HashInsert(pHash, zName, sqlite3Strlen30(zName), pTrig);
    if( pTrig ){
      db->mallocFailed = 1;
    }else if( pLink->pSchema==pLink->pTabSchema ){
      Table *pTab;
      int n = sqlite3Strlen30(pLink->table) + 1;
      pTab = sqlite3HashFind(&pLink->pTabSchema->tblHash, pLink->table, n);
      assert( pTab!=0 );
      pLink->pNext = pTab->pTrigger;
      pTab->pTrigger = pLink;
    }
  }

................................................................................
}

/*
** Return a pointer to the Table structure for the table that a trigger
** is set on.
*/
static Table *tableOfTrigger(Trigger *pTrigger){
  int n = sqlite3Strlen30(pTrigger->table) + 1;
  return sqlite3HashFind(&pTrigger->pTabSchema->tblHash, pTrigger->table, n);
}


/*
** Drop a trigger given a pointer to that trigger. 
*/
................................................................................
  sqlite3 *db = pParse->db;

  assert( pTriggerStep!=0 );
  assert( v!=0 );
  sqlite3VdbeAddOp2(v, OP_ContextPush, 0, 0);
  VdbeComment((v, "begin trigger %s", pStepList->pTrig->name));
  while( pTriggerStep ){
    sqlite3ExprClearColumnCache(pParse, -1);
    orconf = (orconfin == OE_Default)?pTriggerStep->orconf:orconfin;
    pParse->trigStack->orconf = orconf;
    switch( pTriggerStep->op ){
      case TK_SELECT: {
        Select *ss = sqlite3SelectDup(db, pTriggerStep->pSelect, 0);
        if( ss ){
          SelectDest dest;
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.196 2009/02/28 10:47:42 danielk1977 Exp $
*/

#ifndef SQLITE_OMIT_VIRTUALTABLE
/* Forward declaration */
static void updateVirtualTable(
  Parse *pParse,       /* The parsing context */
  SrcList *pSrc,       /* The virtual table to be modified */
................................................................................
**
** Therefore, the P4 parameter is only required if the default value for
** the column is a literal number, string or null. The sqlite3ValueFromExpr()
** function is capable of transforming these types of expressions into
** sqlite3_value objects.
*/
SQLITE_PRIVATE void sqlite3ColumnDefault(Vdbe *v, Table *pTab, int i){

  if( pTab && !pTab->pSelect ){
    sqlite3_value *pValue;
    u8 enc = ENC(sqlite3VdbeDb(v));
    Column *pCol = &pTab->aCol[i];
    VdbeComment((v, "%s.%s", pTab->zName, pCol->zName));
    assert( i<pTab->nCol );
    sqlite3ValueFromExpr(sqlite3VdbeDb(v), pCol->pDflt, enc, 
                         pCol->affinity, &pValue);
................................................................................
  if( sqlite3ResolveExprNames(&sNC, pWhere) ){
    goto update_cleanup;
  }

  /* Begin the database scan
  */
  sqlite3VdbeAddOp2(v, OP_Null, 0, regOldRowid);
  pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0,
                             WHERE_ONEPASS_DESIRED, 0);
  if( pWInfo==0 ) goto update_cleanup;
  okOnePass = pWInfo->okOnePass;

  /* Remember the rowid of every item to be updated.
  */
  sqlite3VdbeAddOp2(v, IsVirtual(pTab)?OP_VRowid:OP_Rowid, iCur, regOldRowid);
  if( !okOnePass ){
    regRowSet = ++pParse->nMem;
    sqlite3VdbeAddOp2(v, OP_RowSetAdd, regRowSet, regOldRowid);
  }

  /* End the database scan loop.
  */
................................................................................
  /* Initialize the count of updated rows
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack ){
    regRowCount = ++pParse->nMem;
    sqlite3VdbeAddOp2(v, OP_Integer, 0, regRowCount);
  }

  if( !isView && !IsVirtual(pTab) ){
    /* 
    ** Open every index that needs updating.  Note that if any
    ** index could potentially invoke a REPLACE conflict resolution 
    ** action, then we need to open all indices because we might need
    ** to be deleting some records.
    */
    if( !okOnePass ) sqlite3OpenTable(pParse, iCur, iDb, pTab, OP_OpenWrite); 
................................................................................
    regCols = sqlite3GetTempRange(pParse, pTab->nCol);
    for(i=0; i<pTab->nCol; i++){
      if( i==pTab->iPKey ){
        sqlite3VdbeAddOp2(v, OP_Null, 0, regCols+i);
        continue;
      }
      j = aXRef[i];
      if( new_col_mask&((u32)1<<i) || new_col_mask==0xffffffff ){
        if( j<0 ){
          sqlite3VdbeAddOp3(v, OP_Column, iCur, i, regCols+i);
          sqlite3ColumnDefault(v, pTab, i);
        }else{
          sqlite3ExprCodeAndCache(pParse, pChanges->a[j].pExpr, regCols+i);
        }
      }else{
................................................................................
    sqlite3ReleaseTempReg(pParse, regRowid);
    sqlite3ReleaseTempReg(pParse, regRow);

    sqlite3VdbeAddOp2(v, OP_Goto, 0, iBeginBeforeTrigger);
    sqlite3VdbeJumpHere(v, iEndBeforeTrigger);
  }

  if( !isView && !IsVirtual(pTab) ){
    /* Loop over every record that needs updating.  We have to load
    ** the old data for each record to be updated because some columns
    ** might not change and we will need to copy the old value.
    ** Also, the old data is needed to delete the old index entries.
    ** So make the cursor point at the old record.
    */
    sqlite3VdbeAddOp3(v, OP_NotExists, iCur, addr, regOldRowid);
................................................................................
      }
    }

    /* Do constraint checks
    */
    sqlite3GenerateConstraintChecks(pParse, pTab, iCur, regNewRowid,
                                    aRegIdx, chngRowid, 1,
                                    onError, addr);

    /* Delete the old indices for the current record.
    */
    j1 = sqlite3VdbeAddOp3(v, OP_NotExists, iCur, 0, regOldRowid);
    sqlite3GenerateRowIndexDelete(pParse, pTab, iCur, aRegIdx);

    /* If changing the record number, delete the old record.
................................................................................
      sqlite3VdbeAddOp2(v, OP_Delete, iCur, 0);
    }
    sqlite3VdbeJumpHere(v, j1);

    /* Create the new index entries and the new record.
    */
    sqlite3CompleteInsertion(pParse, pTab, iCur, regNewRowid, 
                             aRegIdx, 1, -1, 0);
  }

  /* Increment the row counter 
  */
  if( db->flags & SQLITE_CountRows && !pParse->trigStack){
    sqlite3VdbeAddOp2(v, OP_AddImm, regRowCount, 1);
  }
................................................................................
**
*************************************************************************
** This file contains code used to implement the VACUUM command.
**
** Most of the code in this file may be omitted by defining the
** SQLITE_OMIT_VACUUM macro.
**
** $Id: vacuum.c,v 1.86 2009/02/03 16:51:25 danielk1977 Exp $
*/

#if !defined(SQLITE_OMIT_VACUUM) && !defined(SQLITE_OMIT_ATTACH)
/*
** Execute zSql on database db. Return an error code.
*/
static int execSql(sqlite3 *db, const char *zSql){
  sqlite3_stmt *pStmt;

  if( !zSql ){
    return SQLITE_NOMEM;
  }
  if( SQLITE_OK!=sqlite3_prepare(db, zSql, -1, &pStmt, 0) ){
    return sqlite3_errcode(db);
  }
  while( SQLITE_ROW==sqlite3_step(pStmt) ){}

  return sqlite3_finalize(pStmt);
}

/*
** Execute zSql on database db. The statement returns exactly
** one column. Execute this as SQL on the same database.
*/
................................................................................
    int nKey;
    char *zKey;
    sqlite3CodecGetKey(db, 0, (void**)&zKey, &nKey);
    if( nKey ) db->nextPagesize = 0;
  }
#endif

  if( sqlite3BtreeSetPageSize(pTemp, sqlite3BtreeGetPageSize(pMain), nRes)
   || (!isMemDb && sqlite3BtreeSetPageSize(pTemp, db->nextPagesize, nRes))
   || db->mallocFailed 
  ){
    rc = SQLITE_NOMEM;
    goto end_of_vacuum;
  }
  rc = execSql(db, "PRAGMA vacuum_db.synchronous=OFF");
  if( rc!=SQLITE_OK ){
    goto end_of_vacuum;
................................................................................
  ** transaction open on the vacuum database, but not on the main database.
  ** Open a btree level transaction on the main database. This allows a
  ** call to sqlite3BtreeCopyFile(). The main database btree level
  ** transaction is then committed, so the SQL level never knows it was
  ** opened for writing. This way, the SQL transaction used to create the
  ** temporary database never needs to be committed.
  */
  if( rc==SQLITE_OK ){
    u32 meta;
    int i;

    /* This array determines which meta meta values are preserved in the
    ** vacuum.  Even entries are the meta value number and odd entries
    ** are an increment to apply to the meta value after the vacuum.
    ** The increment is used to increase the schema cookie so that other
................................................................................
    };

    assert( 1==sqlite3BtreeIsInTrans(pTemp) );
    assert( 1==sqlite3BtreeIsInTrans(pMain) );

    /* Copy Btree meta values */
    for(i=0; i<ArraySize(aCopy); i+=2){


      rc = sqlite3BtreeGetMeta(pMain, aCopy[i], &meta);
      if( rc!=SQLITE_OK ) goto end_of_vacuum;
      rc = sqlite3BtreeUpdateMeta(pTemp, aCopy[i], meta+aCopy[i+1]);
      if( rc!=SQLITE_OK ) goto end_of_vacuum;
    }

    rc = sqlite3BtreeCopyFile(pMain, pTemp);
    if( rc!=SQLITE_OK ) goto end_of_vacuum;
    rc = sqlite3BtreeCommit(pTemp);
    if( rc!=SQLITE_OK ) goto end_of_vacuum;
#ifndef SQLITE_OMIT_AUTOVACUUM
    sqlite3BtreeSetAutoVacuum(pMain, sqlite3BtreeGetAutoVacuum(pTemp));
#endif
  }

  if( rc==SQLITE_OK ){
    rc = sqlite3BtreeSetPageSize(pMain, sqlite3BtreeGetPageSize(pTemp), nRes);
  }

end_of_vacuum:
  /* Restore the original value of db->flags */
  db->flags = saved_flags;
  db->nChange = saved_nChange;
  db->nTotalChange = saved_nTotalChange;

................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to help implement virtual tables.
**
** $Id: vtab.c,v 1.84 2009/03/24 15:08:10 drh Exp $
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE






static int createModule(
  sqlite3 *db,                    /* Database in which module is registered */
  const char *zName,              /* Name assigned to this module */
  const sqlite3_module *pModule,  /* The definition of the module */
  void *pAux,                     /* Context pointer for xCreate/xConnect */
  void (*xDestroy)(void *)        /* Module destructor function */
) {
................................................................................
}

/*
** Unlock a virtual table.  When the last lock is removed,
** disconnect the virtual table.
*/
SQLITE_PRIVATE void sqlite3VtabUnlock(sqlite3 *db, sqlite3_vtab *pVtab){

  pVtab->nRef--;
  assert(db);
  assert( sqlite3SafetyCheckOk(db) );
  if( pVtab->nRef==0 ){
    if( db->magic==SQLITE_MAGIC_BUSY ){
      (void)sqlite3SafetyOff(db);
      pVtab->pModule->xDisconnect(pVtab);
................................................................................
  ** record of the table. If the module has already been registered,
  ** also call the xConnect method here.
  */
  else {
    Table *pOld;
    Schema *pSchema = pTab->pSchema;
    const char *zName = pTab->zName;
    int nName = sqlite3Strlen30(zName) + 1;
    pOld = sqlite3HashInsert(&pSchema->tblHash, zName, nName, pTab);
    if( pOld ){
      db->mallocFailed = 1;
      assert( pTab==pOld );  /* Malloc must have failed inside HashInsert() */
      return;
    }
    pSchema->db = pParse->db;
................................................................................
** This module contains C code that generates VDBE code used to process
** the WHERE clause of SQL statements.  This module is responsible for
** generating the code that loops through a table looking for applicable
** rows.  Indices are selected and used to speed the search when doing
** so is applicable.  Because this module is responsible for selecting
** indices, you might also think of this module as the "query optimizer".
**
** $Id: where.c,v 1.379 2009/03/29 00:15:54 drh Exp $
*/

/*
** Trace output macros
*/
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
SQLITE_PRIVATE int sqlite3WhereTrace = 0;
#endif
#if 0
# define WHERETRACE(X)  if(sqlite3WhereTrace) sqlite3DebugPrintf X
#else
# define WHERETRACE(X)
#endif

/* Forward reference
*/
................................................................................
typedef struct WhereOrInfo WhereOrInfo;
typedef struct WhereAndInfo WhereAndInfo;
typedef struct WhereCost WhereCost;

/*
** The query generator uses an array of instances of this structure to
** help it analyze the subexpressions of the WHERE clause.  Each WHERE
** clause subexpression is separated from the others by AND operators.
** (Note: the same data structure is also reused to hold a group of terms
** separated by OR operators.  But at the top-level, everything is AND
** separated.)
**
** All WhereTerms are collected into a single WhereClause structure.  
** The following identity holds:
**
**        WhereTerm.pWC->a[WhereTerm.idx] == WhereTerm
**
** When a term is of the form:
................................................................................
** is set to WO_IN|WO_EQ.  The WhereLevel.wsFlags field can then be used as
** the "op" parameter to findTerm when we are resolving equality constraints.
** ISNULL constraints will then not be used on the right table of a left
** join.  Tickets #2177 and #2189.
*/
#define WHERE_ROWID_EQ     0x00001000  /* rowid=EXPR or rowid IN (...) */
#define WHERE_ROWID_RANGE  0x00002000  /* rowid<EXPR and/or rowid>EXPR */
#define WHERE_COLUMN_EQ    0x00010000  /* x=EXPR or x IN (...) */
#define WHERE_COLUMN_RANGE 0x00020000  /* x<EXPR and/or x>EXPR */
#define WHERE_COLUMN_IN    0x00040000  /* x IN (...) */

#define WHERE_INDEXED      0x00070000  /* Anything that uses an index */
#define WHERE_IN_ABLE      0x00071000  /* Able to support an IN operator */
#define WHERE_TOP_LIMIT    0x00100000  /* x<EXPR or x<=EXPR constraint */
#define WHERE_BTM_LIMIT    0x00200000  /* x>EXPR or x>=EXPR constraint */
#define WHERE_IDX_ONLY     0x00800000  /* Use index only - omit table */
#define WHERE_ORDERBY      0x01000000  /* Output will appear in correct order */
#define WHERE_REVERSE      0x02000000  /* Scan in reverse order */
#define WHERE_UNIQUE       0x04000000  /* Selects no more than one row */
#define WHERE_VIRTUALTABLE 0x08000000  /* Use virtual-table processing */
................................................................................
  }else{
    whereSplit(pWC, pExpr->pLeft, op);
    whereSplit(pWC, pExpr->pRight, op);
  }
}

/*
** Initialize an expression mask set
*/
#define initMaskSet(P)  memset(P, 0, sizeof(*P))

/*
** Return the bitmask for the given cursor number.  Return 0 if
** iCursor is not in the set.
*/
static Bitmask getMask(WhereMaskSet *pMaskSet, int iCursor){
  int i;

  for(i=0; i<pMaskSet->n; i++){
    if( pMaskSet->ix[i]==iCursor ){
      return ((Bitmask)1)<<i;
    }
  }
  return 0;
}
................................................................................
  int *pisComplete, /* True if the only wildcard is % in the last character */
  int *pnoCase      /* True if uppercase is equivalent to lowercase */
){
  const char *z;             /* String on RHS of LIKE operator */
  Expr *pRight, *pLeft;      /* Right and left size of LIKE operator */
  ExprList *pList;           /* List of operands to the LIKE operator */
  int c;                     /* One character in z[] */

  int cnt;                   /* Number of non-wildcard prefix characters */
  char wc[3];                /* Wildcard characters */
  CollSeq *pColl;            /* Collating sequence for LHS */
  sqlite3 *db = pParse->db;  /* Database connection */

  if( !sqlite3IsLikeFunction(db, pExpr, pnoCase, wc) ){
    return 0;
................................................................................
    /* No collation is defined for the ROWID.  Use the default. */
    pColl = db->pDfltColl;
  }
  if( (pColl->type!=SQLITE_COLL_BINARY || *pnoCase) &&
      (pColl->type!=SQLITE_COLL_NOCASE || !*pnoCase) ){
    return 0;
  }
  sqlite3DequoteExpr(pRight);
  z = (char *)pRight->token.z;
  cnt = 0;
  if( z ){

    while( (c=z[cnt])!=0 && c!=wc[0] && c!=wc[1] && c!=wc[2] ){ cnt++; }


  }
  if( cnt==0 || 255==(u8)z[cnt-1] ){
    return 0;
  }
  *pisComplete = z[cnt]==wc[0] && z[cnt+1]==0;
  *pnPattern = cnt;
  return 1;
................................................................................

    pLeft = pExpr->x.pList->a[1].pExpr;
    pRight = pExpr->x.pList->a[0].pExpr;
    pStr1 = sqlite3PExpr(pParse, TK_STRING, 0, 0, 0);
    if( pStr1 ){
      sqlite3TokenCopy(db, &pStr1->token, &pRight->token);
      pStr1->token.n = nPattern;
      pStr1->flags = EP_Dequoted;
    }
    pStr2 = sqlite3ExprDup(db, pStr1, 0);
    if( !db->mallocFailed ){
      u8 c, *pC;
      /* assert( pStr2->token.dyn ); */
      pC = (u8*)&pStr2->token.z[nPattern-1];
      c = *pC;
................................................................................
  sqlite3DebugPrintf("  orderByConsumed=%d\n", p->orderByConsumed);
  sqlite3DebugPrintf("  estimatedCost=%g\n", p->estimatedCost);
}
#else
#define TRACE_IDX_INPUTS(A)
#define TRACE_IDX_OUTPUTS(A)
#endif























































































#ifndef SQLITE_OMIT_VIRTUALTABLE

























































































































































/*
** Compute the best index for a virtual table.
**
** The best index is computed by the xBestIndex method of the virtual
** table module.  This routine is really just a wrapper that sets up
** the sqlite3_index_info structure that is used to communicate with
** xBestIndex.
................................................................................
** same virtual table.  The sqlite3_index_info structure is created
** and initialized on the first invocation and reused on all subsequent
** invocations.  The sqlite3_index_info structure is also used when
** code is generated to access the virtual table.  The whereInfoDelete() 
** routine takes care of freeing the sqlite3_index_info structure after
** everybody has finished with it.
*/
static double bestVirtualIndex(
  Parse *pParse,                 /* The parsing context */
  WhereClause *pWC,              /* The WHERE clause */
  struct SrcList_item *pSrc,     /* The FROM clause term to search */
  Bitmask notReady,              /* Mask of cursors that are not available */
  ExprList *pOrderBy,            /* The order by clause */
  int orderByUsable,             /* True if we can potential sort */
  sqlite3_index_info **ppIdxInfo /* Index information passed to xBestIndex */
){
  Table *pTab = pSrc->pTab;
  sqlite3_vtab *pVtab = pTab->pVtab;
  sqlite3_index_info *pIdxInfo;
  struct sqlite3_index_constraint *pIdxCons;
  struct sqlite3_index_orderby *pIdxOrderBy;
  struct sqlite3_index_constraint_usage *pUsage;
  WhereTerm *pTerm;
  int i, j;
  int nOrderBy;
  int rc;







  /* If the sqlite3_index_info structure has not been previously
  ** allocated and initialized for this virtual table, then allocate
  ** and initialize it now
  */
  pIdxInfo = *ppIdxInfo;
  if( pIdxInfo==0 ){
    int nTerm;
    WHERETRACE(("Recomputing index info for %s...\n", pTab->zName));

    /* Count the number of possible WHERE clause constraints referring
    ** to this virtual table */
    for(i=nTerm=0, pTerm=pWC->a; i<pWC->nTerm; i++, pTerm++){
      if( pTerm->leftCursor != pSrc->iCursor ) continue;
      assert( (pTerm->eOperator&(pTerm->eOperator-1))==0 );
      testcase( pTerm->eOperator==WO_IN );
      testcase( pTerm->eOperator==WO_ISNULL );
      if( pTerm->eOperator & (WO_IN|WO_ISNULL) ) continue;
      nTerm++;
    }

    /* If the ORDER BY clause contains only columns in the current 
    ** virtual table then allocate space for the aOrderBy part of
    ** the sqlite3_index_info structure.
    */
    nOrderBy = 0;
    if( pOrderBy ){
      for(i=0; i<pOrderBy->nExpr; i++){
        Expr *pExpr = pOrderBy->a[i].pExpr;
        if( pExpr->op!=TK_COLUMN || pExpr->iTable!=pSrc->iCursor ) break;
      }
      if( i==pOrderBy->nExpr ){
        nOrderBy = pOrderBy->nExpr;
      }
    }

    /* Allocate the sqlite3_index_info structure
    */
    pIdxInfo = sqlite3DbMallocZero(pParse->db, sizeof(*pIdxInfo)
                             + (sizeof(*pIdxCons) + sizeof(*pUsage))*nTerm
                             + sizeof(*pIdxOrderBy)*nOrderBy );
    if( pIdxInfo==0 ){
      sqlite3ErrorMsg(pParse, "out of memory");
      /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
      return (double)0;
    }
    *ppIdxInfo = pIdxInfo;

    /* Initialize the structure.  The sqlite3_index_info structure contains
    ** many fields that are declared "const" to prevent xBestIndex from
    ** changing them.  We have to do some funky casting in order to
    ** initialize those fields.
    */
    pIdxCons = (struct sqlite3_index_constraint*)&pIdxInfo[1];
    pIdxOrderBy = (struct sqlite3_index_orderby*)&pIdxCons[nTerm];
    pUsage = (struct sqlite3_index_constraint_usage*)&pIdxOrderBy[nOrderBy];
    *(int*)&pIdxInfo->nConstraint = nTerm;
    *(int*)&pIdxInfo->nOrderBy = nOrderBy;
    *(struct sqlite3_index_constraint**)&pIdxInfo->aConstraint = pIdxCons;
    *(struct sqlite3_index_orderby**)&pIdxInfo->aOrderBy = pIdxOrderBy;
    *(struct sqlite3_index_constraint_usage**)&pIdxInfo->aConstraintUsage =
                                                                     pUsage;

    for(i=j=0, pTerm=pWC->a; i<pWC->nTerm; i++, pTerm++){
      if( pTerm->leftCursor != pSrc->iCursor ) continue;
      assert( (pTerm->eOperator&(pTerm->eOperator-1))==0 );
      testcase( pTerm->eOperator==WO_IN );
      testcase( pTerm->eOperator==WO_ISNULL );
      if( pTerm->eOperator & (WO_IN|WO_ISNULL) ) continue;
      pIdxCons[j].iColumn = pTerm->u.leftColumn;
      pIdxCons[j].iTermOffset = i;
      pIdxCons[j].op = (u8)pTerm->eOperator;
      /* The direct assignment in the previous line is possible only because
      ** the WO_ and SQLITE_INDEX_CONSTRAINT_ codes are identical.  The
      ** following asserts verify this fact. */
      assert( WO_EQ==SQLITE_INDEX_CONSTRAINT_EQ );
      assert( WO_LT==SQLITE_INDEX_CONSTRAINT_LT );
      assert( WO_LE==SQLITE_INDEX_CONSTRAINT_LE );
      assert( WO_GT==SQLITE_INDEX_CONSTRAINT_GT );
      assert( WO_GE==SQLITE_INDEX_CONSTRAINT_GE );
      assert( WO_MATCH==SQLITE_INDEX_CONSTRAINT_MATCH );
      assert( pTerm->eOperator & (WO_EQ|WO_LT|WO_LE|WO_GT|WO_GE|WO_MATCH) );
      j++;
    }
    for(i=0; i<nOrderBy; i++){
      Expr *pExpr = pOrderBy->a[i].pExpr;
      pIdxOrderBy[i].iColumn = pExpr->iColumn;
      pIdxOrderBy[i].desc = pOrderBy->a[i].sortOrder;
    }
  }

  /* At this point, the sqlite3_index_info structure that pIdxInfo points
  ** to will have been initialized, either during the current invocation or
  ** during some prior invocation.  Now we just have to customize the
  ** details of pIdxInfo for the current invocation and pass it to
  ** xBestIndex.
................................................................................
  */

  /* The module name must be defined. Also, by this point there must
  ** be a pointer to an sqlite3_vtab structure. Otherwise
  ** sqlite3ViewGetColumnNames() would have picked up the error. 
  */
  assert( pTab->azModuleArg && pTab->azModuleArg[0] );
  assert( pVtab );
#if 0
  if( pTab->pVtab==0 ){
    sqlite3ErrorMsg(pParse, "undefined module %s for table %s",
        pTab->azModuleArg[0], pTab->zName);
    return 0.0;
  }
#endif

  /* Set the aConstraint[].usable fields and initialize all 
  ** output variables to zero.
  **
  ** aConstraint[].usable is true for constraints where the right-hand
  ** side contains only references to tables to the left of the current
  ** table.  In other words, if the constraint is of the form:
................................................................................
  pIdxInfo->idxStr = 0;
  pIdxInfo->idxNum = 0;
  pIdxInfo->needToFreeIdxStr = 0;
  pIdxInfo->orderByConsumed = 0;
  /* ((double)2) In case of SQLITE_OMIT_FLOATING_POINT... */
  pIdxInfo->estimatedCost = SQLITE_BIG_DBL / ((double)2);
  nOrderBy = pIdxInfo->nOrderBy;
  if( pIdxInfo->nOrderBy && !orderByUsable ){
    *(int*)&pIdxInfo->nOrderBy = 0;
  }

  (void)sqlite3SafetyOff(pParse->db);
  WHERETRACE(("xBestIndex for %s\n", pTab->zName));
  TRACE_IDX_INPUTS(pIdxInfo);
  rc = pVtab->pModule->xBestIndex(pVtab, pIdxInfo);
  TRACE_IDX_OUTPUTS(pIdxInfo);
  (void)sqlite3SafetyOn(pParse->db);

  if( rc!=SQLITE_OK ){





    if( rc==SQLITE_NOMEM ){
      pParse->db->mallocFailed = 1;
    }else if( !pVtab->zErrMsg ){

      sqlite3ErrorMsg(pParse, "%s", sqlite3ErrStr(rc));

    }else{
      sqlite3ErrorMsg(pParse, "%s", pVtab->zErrMsg);

    }
  }
  sqlite3DbFree(pParse->db, pVtab->zErrMsg);
  pVtab->zErrMsg = 0;


  for(i=0; i<pIdxInfo->nConstraint; i++){
    if( !pIdxInfo->aConstraint[i].usable && pUsage[i].argvIndex>0 ){
      sqlite3ErrorMsg(pParse, 
          "table %s: xBestIndex returned an invalid plan", pTab->zName);
      /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
      return (double)0;
    }
  }

  *(int*)&pIdxInfo->nOrderBy = nOrderBy;
  return pIdxInfo->estimatedCost;




}
#endif /* SQLITE_OMIT_VIRTUALTABLE */

/*
** Find the query plan for accessing a particular table.  Write the
** best query plan and its cost into the WhereCost object supplied as the
** last parameter.
................................................................................
** then the cost is calculated in the usual way.
**
** If a NOT INDEXED clause (pSrc->notIndexed!=0) was attached to the table 
** in the SELECT statement, then no indexes are considered. However, the 
** selected plan may still take advantage of the tables built-in rowid
** index.
*/
static void bestIndex(
  Parse *pParse,              /* The parsing context */
  WhereClause *pWC,           /* The WHERE clause */
  struct SrcList_item *pSrc,  /* The FROM clause term to search */
  Bitmask notReady,           /* Mask of cursors that are not available */
  ExprList *pOrderBy,         /* The ORDER BY clause */
  WhereCost *pCost            /* Lowest cost query plan */
){
................................................................................
  int rev;                    /* True to scan in reverse order */
  int wsFlags;                /* Flags associated with pProbe */
  int nEq;                    /* Number of == or IN constraints */
  int eqTermMask;             /* Mask of valid equality operators */
  double cost;                /* Cost of using pProbe */
  double nRow;                /* Estimated number of rows in result set */
  int i;                      /* Loop counter */
  Bitmask maskSrc;            /* Bitmask for the pSrc table */

  WHERETRACE(("bestIndex: tbl=%s notReady=%llx\n", pSrc->pTab->zName,notReady));
  pProbe = pSrc->pTab->pIndex;
  if( pSrc->notIndexed ){
    pProbe = 0;
  }

................................................................................
  ** well put it first in the join order.  That way, perhaps it can be
  ** referenced by other tables in the join.
  */
  memset(pCost, 0, sizeof(*pCost));
  if( pProbe==0 &&
     findTerm(pWC, iCur, -1, 0, WO_EQ|WO_IN|WO_LT|WO_LE|WO_GT|WO_GE,0)==0 &&
     (pOrderBy==0 || !sortableByRowid(iCur, pOrderBy, pWC->pMaskSet, &rev)) ){







    return;
  }
  pCost->rCost = SQLITE_BIG_DBL;

  /* Check for a rowid=EXPR or rowid IN (...) constraints. If there was
  ** an INDEXED BY clause attached to this table, skip this step.
  */
................................................................................
    if( cost<pCost->rCost ){
      pCost->rCost = cost;
      pCost->nRow = nRow;
      pCost->plan.wsFlags = wsFlags;
    }
  }

#ifndef SQLITE_OMIT_OR_OPTIMIZATION
  /* Search for an OR-clause that can be used to look up the table.
  */
  maskSrc = getMask(pWC->pMaskSet, iCur);
  for(i=0, pTerm=pWC->a; i<pWC->nTerm; i++, pTerm++){
    WhereClause tempWC;
    tempWC = *pWC;
    if( pTerm->eOperator==WO_OR 
        && ((pTerm->prereqAll & ~maskSrc) & notReady)==0
        && (pTerm->u.pOrInfo->indexable & maskSrc)!=0 ){
      WhereClause *pOrWC = &pTerm->u.pOrInfo->wc;
      WhereTerm *pOrTerm;
      int j;
      int sortable = 0;
      double rTotal = 0;
      nRow = 0;
      for(j=0, pOrTerm=pOrWC->a; j<pOrWC->nTerm; j++, pOrTerm++){
        WhereCost sTermCost;
        WHERETRACE(("... Multi-index OR testing for term %d of %d....\n", j,i));
        if( pOrTerm->eOperator==WO_AND ){
          WhereClause *pAndWC = &pOrTerm->u.pAndInfo->wc;
          bestIndex(pParse, pAndWC, pSrc, notReady, 0, &sTermCost);
        }else if( pOrTerm->leftCursor==iCur ){
          tempWC.a = pOrTerm;
          tempWC.nTerm = 1;
          bestIndex(pParse, &tempWC, pSrc, notReady, 0, &sTermCost);
        }else{
          continue;
        }
        rTotal += sTermCost.rCost;
        nRow += sTermCost.nRow;
        if( rTotal>=pCost->rCost ) break;
      }
      if( pOrderBy!=0 ){
        if( sortableByRowid(iCur, pOrderBy, pWC->pMaskSet, &rev) && !rev ){
          sortable = 1;
        }else{
          rTotal += nRow*estLog(nRow);
          WHERETRACE(("... sorting increases OR cost to %.9g\n", rTotal));
        }
      }
      WHERETRACE(("... multi-index OR cost=%.9g nrow=%.9g\n",
                  rTotal, nRow));
      if( rTotal<pCost->rCost ){
        pCost->rCost = rTotal;
        pCost->nRow = nRow;
        pCost->plan.wsFlags = WHERE_MULTI_OR;
        pCost->plan.u.pTerm = pTerm;
        if( sortable ){
          pCost->plan.wsFlags = WHERE_ORDERBY|WHERE_MULTI_OR;
        }
      }
    }
  }
#endif /* SQLITE_OMIT_OR_OPTIMIZATION */

  /* If the pSrc table is the right table of a LEFT JOIN then we may not
  ** use an index to satisfy IS NULL constraints on that table.  This is
  ** because columns might end up being NULL if the table does not match -
  ** a circumstance which the index cannot help us discover.  Ticket #2177.
  */
  if( (pSrc->jointype & JT_LEFT)!=0 ){
................................................................................
  for(; pProbe; pProbe=(pSrc->pIndex ? 0 : pProbe->pNext)){
    double inMultiplier = 1;  /* Number of equality look-ups needed */
    int inMultIsEst = 0;      /* True if inMultiplier is an estimate */

    WHERETRACE(("... index %s:\n", pProbe->zName));

    /* Count the number of columns in the index that are satisfied
    ** by x=EXPR constraints or x IN (...) constraints.  For a term

    ** of the form x=EXPR we only have to do a single binary search.
    ** But for x IN (...) we have to do a number of binary searched
    ** equal to the number of entries on the RHS of the IN operator.
    ** The inMultipler variable with try to estimate the number of
    ** binary searches needed.
    */
    wsFlags = 0;
    for(i=0; i<pProbe->nColumn; i++){
      int j = pProbe->aiColumn[i];
................................................................................
        wsFlags |= WHERE_COLUMN_IN;
        if( ExprHasProperty(pExpr, EP_xIsSelect) ){
          inMultiplier *= 25;
          inMultIsEst = 1;
        }else if( pExpr->x.pList ){
          inMultiplier *= pExpr->x.pList->nExpr + 1;
        }


      }
    }
    nRow = pProbe->aiRowEst[i] * inMultiplier;
    /* If inMultiplier is an estimate and that estimate results in an
    ** nRow it that is more than half number of rows in the table,
    ** then reduce inMultipler */
    if( inMultIsEst && nRow*2 > pProbe->aiRowEst[0] ){
      nRow = pProbe->aiRowEst[0]/2;
      inMultiplier = nRow/pProbe->aiRowEst[i];
    }
    cost = nRow + inMultiplier*estLog(pProbe->aiRowEst[0]);
    nEq = i;
    if( pProbe->onError!=OE_None && (wsFlags & WHERE_COLUMN_IN)==0
         && nEq==pProbe->nColumn ){



      wsFlags |= WHERE_UNIQUE;

    }
    WHERETRACE(("...... nEq=%d inMult=%.9g nRow=%.9g cost=%.9g\n",
                nEq, inMultiplier, nRow, cost));

    /* Look for range constraints.  Assume that each range constraint
    ** makes the search space 1/3rd smaller.
    */
................................................................................
                    nRow, cost));
      }
    }

    /* Add the additional cost of sorting if that is a factor.
    */
    if( pOrderBy ){
      if( (wsFlags & WHERE_COLUMN_IN)==0 &&
           isSortingIndex(pParse,pWC->pMaskSet,pProbe,iCur,pOrderBy,nEq,&rev) ){

        if( wsFlags==0 ){
          wsFlags = WHERE_COLUMN_RANGE;
        }
        wsFlags |= WHERE_ORDERBY;
        if( rev ){
          wsFlags |= WHERE_REVERSE;
        }
................................................................................
  pCost->plan.wsFlags |= eqTermMask;
  WHERETRACE(("best index is %s, cost=%.9g, nrow=%.9g, wsFlags=%x, nEq=%d\n",
        (pCost->plan.wsFlags & WHERE_INDEXED)!=0 ?
             pCost->plan.u.pIdx->zName : "(none)", pCost->nRow,
        pCost->rCost, pCost->plan.wsFlags, pCost->plan.nEq));
}



























/*
** Disable a term in the WHERE clause.  Except, do not disable the term
** if it controls a LEFT OUTER JOIN and it did not originate in the ON
** or USING clause of that join.
**
** Consider the term t2.z='ok' in the following queries:
................................................................................
    if( (pTerm->eOperator & (WO_ISNULL|WO_IN))==0 ){
      sqlite3VdbeAddOp2(v, OP_IsNull, regBase+j, pLevel->addrBrk);
    }
  }
  return regBase;
}

/*
** Return TRUE if the WhereClause pWC contains no terms that
** are not virtual and which have not been coded.
**
** To put it another way, return TRUE if no additional WHERE clauses
** tests are required in order to establish that the current row
** should go to output and return FALSE if there are some terms of
** the WHERE clause that need to be validated before outputing the row.
*/
static int whereRowReadyForOutput(WhereClause *pWC){
  WhereTerm *pTerm;
  int j;
 
  for(pTerm=pWC->a, j=pWC->nTerm; j>0; j--, pTerm++){
    if( (pTerm->wtFlags & (TERM_VIRTUAL|TERM_CODED))==0 ) return 0;
  }
  return 1;
}

/*
** Generate code for the start of the iLevel-th loop in the WHERE clause
** implementation described by pWInfo.
*/
static Bitmask codeOneLoopStart(
  WhereInfo *pWInfo,   /* Complete information about the WHERE clause */
  int iLevel,          /* Which level of pWInfo->a[] should be coded */
  u8 wctrlFlags,       /* One of the WHERE_* flags defined in sqliteInt.h */
  Bitmask notReady     /* Which tables are currently available */
){
  int j, k;            /* Loop counters */
  int iCur;            /* The VDBE cursor for the table */
  int addrNxt;         /* Where to jump to continue with the next IN case */
  int omitTable;       /* True if we use the index only */
  int bRev;            /* True if we need to scan in reverse order */
................................................................................
  WhereClause *pWC;    /* Decomposition of the entire WHERE clause */
  WhereTerm *pTerm;               /* A WHERE clause term */
  Parse *pParse;                  /* Parsing context */
  Vdbe *v;                        /* The prepared stmt under constructions */
  struct SrcList_item *pTabItem;  /* FROM clause term being coded */
  int addrBrk;                    /* Jump here to break out of the loop */
  int addrCont;                   /* Jump here to continue with next cycle */
  int regRowSet;       /* Write rowids to this RowSet if non-negative */
  int codeRowSetEarly; /* True if index fully constrains the search */
  

  pParse = pWInfo->pParse;
  v = pParse->pVdbe;
  pWC = pWInfo->pWC;
  pLevel = &pWInfo->a[iLevel];
  pTabItem = &pWInfo->pTabList->a[pLevel->iFrom];
  iCur = pTabItem->iCursor;
  bRev = (pLevel->plan.wsFlags & WHERE_REVERSE)!=0;
  omitTable = (pLevel->plan.wsFlags & WHERE_IDX_ONLY)!=0;
  regRowSet = pWInfo->regRowSet;
  codeRowSetEarly = 0;

  /* Create labels for the "break" and "continue" instructions
  ** for the current loop.  Jump to addrBrk to break out of a loop.
  ** Jump to cont to go immediately to the next iteration of the
  ** loop.
  **
  ** When there is an IN operator, we also have a "addrNxt" label that
................................................................................
    int nConstraint = pVtabIdx->nConstraint;
    struct sqlite3_index_constraint_usage *aUsage =
                                                pVtabIdx->aConstraintUsage;
    const struct sqlite3_index_constraint *aConstraint =
                                                pVtabIdx->aConstraint;

    iReg = sqlite3GetTempRange(pParse, nConstraint+2);
    pParse->disableColCache++;
    for(j=1; j<=nConstraint; j++){
      for(k=0; k<nConstraint; k++){
        if( aUsage[k].argvIndex==j ){
          int iTerm = aConstraint[k].iTermOffset;
          assert( pParse->disableColCache );
          sqlite3ExprCode(pParse, pWC->a[iTerm].pExpr->pRight, iReg+j+1);
          break;
        }
      }
      if( k==nConstraint ) break;
    }
    assert( pParse->disableColCache );
    pParse->disableColCache--;
    sqlite3VdbeAddOp2(v, OP_Integer, pVtabIdx->idxNum, iReg);
    sqlite3VdbeAddOp2(v, OP_Integer, j-1, iReg+1);
    sqlite3VdbeAddOp4(v, OP_VFilter, iCur, addrBrk, iReg, pVtabIdx->idxStr,
                      pVtabIdx->needToFreeIdxStr ? P4_MPRINTF : P4_STATIC);
    pVtabIdx->needToFreeIdxStr = 0;
    for(j=0; j<nConstraint; j++){
      if( aUsage[j].omit ){
................................................................................
        int iTerm = aConstraint[j].iTermOffset;
        disableTerm(pLevel, &pWC->a[iTerm]);
      }
    }
    pLevel->op = OP_VNext;
    pLevel->p1 = iCur;
    pLevel->p2 = sqlite3VdbeCurrentAddr(v);
    codeRowSetEarly = regRowSet>=0 ? whereRowReadyForOutput(pWC) : 0;
    if( codeRowSetEarly ){
      sqlite3VdbeAddOp2(v, OP_VRowid, iCur, iReg);
      sqlite3VdbeAddOp2(v, OP_RowSetAdd, regRowSet, iReg);
    }
    sqlite3ReleaseTempRange(pParse, iReg, nConstraint+2);
  }else
#endif /* SQLITE_OMIT_VIRTUALTABLE */

  if( pLevel->plan.wsFlags & WHERE_ROWID_EQ ){
    /* Case 1:  We can directly reference a single row using an
    **          equality comparison against the ROWID field.  Or
    **          we reference multiple rows using a "rowid IN (...)"
    **          construct.
    */
    int r1;
    int rtmp = sqlite3GetTempReg(pParse);
    pTerm = findTerm(pWC, iCur, -1, notReady, WO_EQ|WO_IN, 0);
    assert( pTerm!=0 );
    assert( pTerm->pExpr!=0 );
    assert( pTerm->leftCursor==iCur );
    assert( omitTable==0 );
    r1 = codeEqualityTerm(pParse, pTerm, pLevel, rtmp);
    addrNxt = pLevel->addrNxt;
    sqlite3VdbeAddOp2(v, OP_MustBeInt, r1, addrNxt);
    sqlite3VdbeAddOp3(v, OP_NotExists, iCur, addrNxt, r1);
    codeRowSetEarly = (pWC->nTerm==1 && regRowSet>=0) ?1:0;
    if( codeRowSetEarly ){
      sqlite3VdbeAddOp2(v, OP_RowSetAdd, regRowSet, r1);
    }
    sqlite3ReleaseTempReg(pParse, rtmp);
    VdbeComment((v, "pk"));
    pLevel->op = OP_Noop;
  }else if( pLevel->plan.wsFlags & WHERE_ROWID_RANGE ){
    /* Case 2:  We have an inequality comparison against the ROWID field.
    */
    int testOp = OP_Noop;
    int start;
................................................................................
      disableTerm(pLevel, pEnd);
    }
    start = sqlite3VdbeCurrentAddr(v);
    pLevel->op = bRev ? OP_Prev : OP_Next;
    pLevel->p1 = iCur;
    pLevel->p2 = start;
    pLevel->p5 = (pStart==0 && pEnd==0) ?1:0;
    codeRowSetEarly = regRowSet>=0 ? whereRowReadyForOutput(pWC) : 0;
    if( codeRowSetEarly || testOp!=OP_Noop ){
      int r1 = sqlite3GetTempReg(pParse);
      sqlite3VdbeAddOp2(v, OP_Rowid, iCur, r1);
      if( testOp!=OP_Noop ){

        sqlite3VdbeAddOp3(v, testOp, memEndValue, addrBrk, r1);
        sqlite3VdbeChangeP5(v, SQLITE_AFF_NUMERIC | SQLITE_JUMPIFNULL);
      }
      if( codeRowSetEarly ){
        sqlite3VdbeAddOp2(v, OP_RowSetAdd, regRowSet, r1);
      }
      sqlite3ReleaseTempReg(pParse, r1);
    }
  }else if( pLevel->plan.wsFlags & (WHERE_COLUMN_RANGE|WHERE_COLUMN_EQ) ){
    /* Case 3: A scan using an index.
    **
    **         The WHERE clause may contain zero or more equality 
    **         terms ("==" or "IN" operators) that refer to the N
    **         left-most columns of the index. It may also contain
................................................................................
    startEq = !pRangeStart || pRangeStart->eOperator & (WO_LE|WO_GE);
    endEq =   !pRangeEnd || pRangeEnd->eOperator & (WO_LE|WO_GE);
    start_constraints = pRangeStart || nEq>0;

    /* Seek the index cursor to the start of the range. */
    nConstraint = nEq;
    if( pRangeStart ){
      int dcc = pParse->disableColCache;
      if( pRangeEnd ){
        pParse->disableColCache++;
      }
      sqlite3ExprCode(pParse, pRangeStart->pExpr->pRight, regBase+nEq);
      pParse->disableColCache = dcc;
      sqlite3VdbeAddOp2(v, OP_IsNull, regBase+nEq, addrNxt);
      nConstraint++;
    }else if( isMinQuery ){
      sqlite3VdbeAddOp2(v, OP_Null, 0, regBase+nEq);
      nConstraint++;
      startEq = 0;
      start_constraints = 1;
................................................................................
                      SQLITE_INT_TO_PTR(nConstraint), P4_INT32);

    /* Load the value for the inequality constraint at the end of the
    ** range (if any).
    */
    nConstraint = nEq;
    if( pRangeEnd ){

      sqlite3ExprCode(pParse, pRangeEnd->pExpr->pRight, regBase+nEq);
      sqlite3VdbeAddOp2(v, OP_IsNull, regBase+nEq, addrNxt);
      codeApplyAffinity(pParse, regBase, nEq+1, pIdx);
      nConstraint++;
    }

    /* Top of the loop body */
................................................................................
    r1 = sqlite3GetTempReg(pParse);
    testcase( pLevel->plan.wsFlags & WHERE_BTM_LIMIT );
    testcase( pLevel->plan.wsFlags & WHERE_TOP_LIMIT );
    if( pLevel->plan.wsFlags & (WHERE_BTM_LIMIT|WHERE_TOP_LIMIT) ){
      sqlite3VdbeAddOp3(v, OP_Column, iIdxCur, nEq, r1);
      sqlite3VdbeAddOp2(v, OP_IsNull, r1, addrCont);
    }


    /* Seek the table cursor, if required */
    disableTerm(pLevel, pRangeStart);
    disableTerm(pLevel, pRangeEnd);
    codeRowSetEarly = regRowSet>=0 ? whereRowReadyForOutput(pWC) : 0;
    if( !omitTable || codeRowSetEarly ){

      sqlite3VdbeAddOp2(v, OP_IdxRowid, iIdxCur, r1);
      if( codeRowSetEarly ){
        sqlite3VdbeAddOp2(v, OP_RowSetAdd, regRowSet, r1);
      }else{
        sqlite3VdbeAddOp2(v, OP_Seek, iCur, r1);  /* Deferred seek */
      }
    }
    sqlite3ReleaseTempReg(pParse, r1);

    /* Record the instruction used to terminate the loop. Disable 
    ** WHERE clause terms made redundant by the index range scan.
    */
    pLevel->op = bRev ? OP_Prev : OP_Next;
    pLevel->p1 = iIdxCur;
  }else
................................................................................
    **   CREATE INDEX i1 ON t1(a);
    **   CREATE INDEX i2 ON t1(b);
    **   CREATE INDEX i3 ON t1(c);
    **
    **   SELECT * FROM t1 WHERE a=5 OR b=7 OR (c=11 AND d=13)
    **
    ** In the example, there are three indexed terms connected by OR.
    ** The top of the loop is constructed by creating a RowSet object
    ** and populating it.  Then looping over elements of the rowset.

    **







    **        Null 1
    **        # fill RowSet 1 with entries where a=5 using i1
    **        # fill Rowset 1 with entries where b=7 using i2
    **        # fill Rowset 1 with entries where c=11 and d=13 i3 and t1
    **     A: RowSetRead 1, B, 2
    **        Seek       i, 2
    **
    ** The bottom of the loop looks like this:


    **
    **        Goto       0, A


    **     B:






    */
    int regOrRowset;       /* Register holding the RowSet object */
    int regNextRowid;      /* Register holding next rowid */
    WhereClause *pOrWc;    /* The OR-clause broken out into subterms */
    WhereTerm *pOrTerm;    /* A single subterm within the OR-clause */
    SrcList oneTab;        /* Shortened table list */







   
    pTerm = pLevel->plan.u.pTerm;
    assert( pTerm!=0 );
    assert( pTerm->eOperator==WO_OR );
    assert( (pTerm->wtFlags & TERM_ORINFO)!=0 );
    pOrWc = &pTerm->u.pOrInfo->wc;
    codeRowSetEarly = (regRowSet>=0 && pWC->nTerm==1) ?1:0;

    if( codeRowSetEarly ){
      regOrRowset = regRowSet;
    }else{
      regOrRowset = sqlite3GetTempReg(pParse);
      sqlite3VdbeAddOp2(v, OP_Null, 0, regOrRowset);
    }
    oneTab.nSrc = 1;
    oneTab.nAlloc = 1;
    oneTab.a[0] = *pTabItem;
    for(j=0, pOrTerm=pOrWc->a; j<pOrWc->nTerm; j++, pOrTerm++){
      WhereInfo *pSubWInfo;
      if( pOrTerm->leftCursor!=iCur && pOrTerm->eOperator!=WO_AND ) continue;
      pSubWInfo = sqlite3WhereBegin(pParse, &oneTab, pOrTerm->pExpr, 0,
                        WHERE_FILL_ROWSET | WHERE_OMIT_OPEN | WHERE_OMIT_CLOSE,
                        regOrRowset);
      if( pSubWInfo ){
        sqlite3WhereEnd(pSubWInfo);
      }
    }
    sqlite3VdbeResolveLabel(v, addrCont);
    if( !codeRowSetEarly ){
      regNextRowid = sqlite3GetTempReg(pParse);
      addrCont = 
         sqlite3VdbeAddOp3(v, OP_RowSetRead, regOrRowset,addrBrk,regNextRowid);
      sqlite3VdbeAddOp2(v, OP_Seek, iCur, regNextRowid);
      sqlite3ReleaseTempReg(pParse, regNextRowid);
      /* sqlite3ReleaseTempReg(pParse, regOrRowset); // Preserve the RowSet */
      pLevel->op = OP_Goto;
      pLevel->p2 = addrCont;
    }else{
      pLevel->op = OP_Noop;
    }























    disableTerm(pLevel, pTerm);
  }else
#endif /* SQLITE_OMIT_OR_OPTIMIZATION */

  {
    /* Case 5:  There is no usable index.  We must do a complete
    **          scan of the entire table.
................................................................................
    static const u8 aStart[] = { OP_Rewind, OP_Last };
    assert( bRev==0 || bRev==1 );
    assert( omitTable==0 );
    pLevel->op = aStep[bRev];
    pLevel->p1 = iCur;
    pLevel->p2 = 1 + sqlite3VdbeAddOp2(v, aStart[bRev], iCur, addrBrk);
    pLevel->p5 = SQLITE_STMTSTATUS_FULLSCAN_STEP;
    codeRowSetEarly = 0;
  }
  notReady &= ~getMask(pWC->pMaskSet, iCur);

  /* Insert code to test every subexpression that can be completely
  ** computed using the current set of tables.
  */
  k = 0;
................................................................................
    if( pTerm->wtFlags & (TERM_VIRTUAL|TERM_CODED) ) continue;
    if( (pTerm->prereqAll & notReady)!=0 ) continue;
    pE = pTerm->pExpr;
    assert( pE!=0 );
    if( pLevel->iLeftJoin && !ExprHasProperty(pE, EP_FromJoin) ){
      continue;
    }
    pParse->disableColCache += k;
    sqlite3ExprIfFalse(pParse, pE, addrCont, SQLITE_JUMPIFNULL);
    pParse->disableColCache -= k;
    k = 1;
    pTerm->wtFlags |= TERM_CODED;
  }

  /* For a LEFT OUTER JOIN, generate code that will record the fact that
  ** at least one row of the right table has matched the left table.  
  */
  if( pLevel->iLeftJoin ){
    pLevel->addrFirst = sqlite3VdbeCurrentAddr(v);
    sqlite3VdbeAddOp2(v, OP_Integer, 1, pLevel->iLeftJoin);
    VdbeComment((v, "record LEFT JOIN hit"));
    sqlite3ExprClearColumnCache(pParse, pLevel->iTabCur);
    sqlite3ExprClearColumnCache(pParse, pLevel->iIdxCur);
    for(pTerm=pWC->a, j=0; j<pWC->nTerm; j++, pTerm++){
      testcase( pTerm->wtFlags & TERM_VIRTUAL );
      testcase( pTerm->wtFlags & TERM_CODED );
      if( pTerm->wtFlags & (TERM_VIRTUAL|TERM_CODED) ) continue;
      if( (pTerm->prereqAll & notReady)!=0 ) continue;
      assert( pTerm->pExpr );
      sqlite3ExprIfFalse(pParse, pTerm->pExpr, addrCont, SQLITE_JUMPIFNULL);
      pTerm->wtFlags |= TERM_CODED;
    }
  }

  /*
  ** If it was requested to store the results in a rowset and that has
  ** not already been do, then do so now.
  */
  if( regRowSet>=0 && !codeRowSetEarly ){
    int r1 = sqlite3GetTempReg(pParse);
#ifndef SQLITE_OMIT_VIRTUALTABLE
    if(  (pLevel->plan.wsFlags & WHERE_VIRTUALTABLE)!=0 ){
      sqlite3VdbeAddOp2(v, OP_VRowid, iCur, r1);
    }else
#endif
    {
      sqlite3VdbeAddOp2(v, OP_Rowid, iCur, r1);
    }
    sqlite3VdbeAddOp2(v, OP_RowSetAdd, regRowSet, r1);
    sqlite3ReleaseTempReg(pParse, r1);
  }

  return notReady;
}

#if defined(SQLITE_TEST)
/*
** The following variable holds a text description of query plan generated
................................................................................
*/
static void whereInfoFree(sqlite3 *db, WhereInfo *pWInfo){
  if( pWInfo ){
    int i;
    for(i=0; i<pWInfo->nLevel; i++){
      sqlite3_index_info *pInfo = pWInfo->a[i].pIdxInfo;
      if( pInfo ){
        assert( pInfo->needToFreeIdxStr==0 || db->mallocFailed );
        if( pInfo->needToFreeIdxStr ){
          sqlite3_free(pInfo->idxStr);
        }
        sqlite3DbFree(db, pInfo);
      }
    }
    whereClauseClear(pWInfo->pWC);
................................................................................
** output order, then the *ppOrderBy is unchanged.
*/
SQLITE_PRIVATE WhereInfo *sqlite3WhereBegin(
  Parse *pParse,        /* The parser context */
  SrcList *pTabList,    /* A list of all tables to be scanned */
  Expr *pWhere,         /* The WHERE clause */
  ExprList **ppOrderBy, /* An ORDER BY clause, or NULL */
  u8 wctrlFlags,        /* One of the WHERE_* flags defined in sqliteInt.h */
  int regRowSet         /* Register hold RowSet if WHERE_FILL_ROWSET is set */
){
  int i;                     /* Loop counter */
  int nByteWInfo;            /* Num. bytes allocated for WhereInfo struct */
  WhereInfo *pWInfo;         /* Will become the return value of this function */
  Vdbe *v = pParse->pVdbe;   /* The virtual database engine */
  Bitmask notReady;          /* Cursors that are not yet positioned */
  WhereMaskSet *pMaskSet;    /* The expression mask set */
................................................................................
  if( db->mallocFailed ){
    goto whereBeginError;
  }
  pWInfo->nLevel = pTabList->nSrc;
  pWInfo->pParse = pParse;
  pWInfo->pTabList = pTabList;
  pWInfo->iBreak = sqlite3VdbeMakeLabel(v);
  pWInfo->regRowSet = (wctrlFlags & WHERE_FILL_ROWSET) ? regRowSet : -1;
  pWInfo->pWC = pWC = (WhereClause *)&((u8 *)pWInfo)[nByteWInfo];
  pWInfo->wctrlFlags = wctrlFlags;
  pMaskSet = (WhereMaskSet*)&pWC[1];

  /* Split the WHERE clause into separate subexpressions where each
  ** subexpression is separated by an AND operator.
  */
................................................................................
    int bestJ = 0;              /* The value of j */
    Bitmask m;                  /* Bitmask value for j or bestJ */
    int once = 0;               /* True when first table is seen */

    memset(&bestPlan, 0, sizeof(bestPlan));
    bestPlan.rCost = SQLITE_BIG_DBL;
    for(j=iFrom, pTabItem=&pTabList->a[j]; j<pTabList->nSrc; j++, pTabItem++){
      int doNotReorder;  /* True if this table should not be reordered */
      WhereCost sCost;   /* Cost information from bestIndex() */


      doNotReorder =  (pTabItem->jointype & (JT_LEFT|JT_CROSS))!=0;
      if( once && doNotReorder ) break;
      m = getMask(pMaskSet, pTabItem->iCursor);
      if( (m & notReady)==0 ){
        if( j==iFrom ) iFrom++;
        continue;
      }


      assert( pTabItem->pTab );
#ifndef SQLITE_OMIT_VIRTUALTABLE
      if( IsVirtual(pTabItem->pTab) ){
        sqlite3_index_info *pVtabIdx; /* Current virtual index */
        sqlite3_index_info **ppIdxInfo = &pWInfo->a[j].pIdxInfo;
        sCost.rCost = bestVirtualIndex(pParse, pWC, pTabItem, notReady,
                                       ppOrderBy ? *ppOrderBy : 0, i==0,
                                       ppIdxInfo);
        sCost.plan.wsFlags = WHERE_VIRTUALTABLE;
        sCost.plan.u.pVtabIdx = pVtabIdx = *ppIdxInfo;
        if( pVtabIdx && pVtabIdx->orderByConsumed ){
          sCost.plan.wsFlags = WHERE_VIRTUALTABLE | WHERE_ORDERBY;
        }
        sCost.plan.nEq = 0;
        /* (double)2 In case of SQLITE_OMIT_FLOATING_POINT... */
        if( (SQLITE_BIG_DBL/((double)2))<sCost.rCost ){
          /* The cost is not allowed to be larger than SQLITE_BIG_DBL (the
          ** inital value of lowestCost in this loop. If it is, then
          ** the (cost<lowestCost) test below will never be true.
          */ 
          /* (double)2 In case of SQLITE_OMIT_FLOATING_POINT... */
          sCost.rCost = (SQLITE_BIG_DBL/((double)2));
        }
      }else 
#endif
      {
        bestIndex(pParse, pWC, pTabItem, notReady,
                  (i==0 && ppOrderBy) ? *ppOrderBy : 0, &sCost);
      }
      if( once==0 || sCost.rCost<bestPlan.rCost ){
        once = 1;
        bestPlan = sCost;
        bestJ = j;
      }
      if( doNotReorder ) break;
................................................................................
        ** guaranteed to find the index specified in the INDEXED BY clause
        ** if it find an index at all. */
        assert( bestPlan.plan.u.pIdx==pIdx );
      }
    }
  }
  WHERETRACE(("*** Optimizer Finished ***\n"));
  if( db->mallocFailed ){
    goto whereBeginError;
  }

  /* If the total query only selects a single row, then the ORDER BY
  ** clause is irrelevant.
  */
  if( (andFlags & WHERE_UNIQUE)!=0 && ppOrderBy ){
................................................................................
  int i;
  WhereLevel *pLevel;
  SrcList *pTabList = pWInfo->pTabList;
  sqlite3 *db = pParse->db;

  /* Generate loop termination code.
  */
  sqlite3ExprClearColumnCache(pParse, -1);
  for(i=pTabList->nSrc-1; i>=0; i--){
    pLevel = &pWInfo->a[i];
    sqlite3VdbeResolveLabel(v, pLevel->addrCont);
    if( pLevel->op!=OP_Noop ){
      sqlite3VdbeAddOp2(v, pLevel->op, pLevel->p1, pLevel->p2);
      sqlite3VdbeChangeP5(v, pLevel->p5);
    }
................................................................................
    if( pLevel->iLeftJoin ){
      int addr;
      addr = sqlite3VdbeAddOp1(v, OP_IfPos, pLevel->iLeftJoin);
      sqlite3VdbeAddOp1(v, OP_NullRow, pTabList->a[i].iCursor);
      if( pLevel->iIdxCur>=0 ){
        sqlite3VdbeAddOp1(v, OP_NullRow, pLevel->iIdxCur);
      }



      sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel->addrFirst);

      sqlite3VdbeJumpHere(v, addr);
    }
  }

  /* The "break" point is here, just past the end of the outer loop.
  ** Set it.
  */
................................................................................
  sqlite3SelectDelete(pParse->db, yymsp[0].minor.yy331);
}
        break;
      case 36: /* column ::= columnid type carglist */
{
  yygotominor.yy0.z = yymsp[-2].minor.yy0.z;
  yygotominor.yy0.n = (int)(pParse->sLastToken.z-yymsp[-2].minor.yy0.z) + pParse->sLastToken.n;


}
        break;
      case 37: /* columnid ::= nm */
{
  sqlite3AddColumn(pParse,&yymsp[0].minor.yy0);
  yygotominor.yy0 = yymsp[0].minor.yy0;
}
................................................................................
*************************************************************************
** An tokenizer for SQL
**
** This file contains C code that splits an SQL input string up into
** individual tokens and sends those tokens one-by-one over to the
** parser for analysis.
**
** $Id: tokenize.c,v 1.155 2009/03/31 03:41:57 shane Exp $
*/

/*
** The charMap() macro maps alphabetic characters into their
** lower-case ASCII equivalent.  On ASCII machines, this is just
** an upper-to-lower case map.  On EBCDIC machines we also need
** to adjust the encoding.  Only alphabetic characters and underscores
................................................................................
  assert( pParse->pNewTrigger==0 );
  assert( pParse->nVar==0 );
  assert( pParse->nVarExpr==0 );
  assert( pParse->nVarExprAlloc==0 );
  assert( pParse->apVarExpr==0 );
  enableLookaside = db->lookaside.bEnabled;
  if( db->lookaside.pStart ) db->lookaside.bEnabled = 1;

  while( !db->mallocFailed && zSql[i]!=0 ){
    assert( i>=0 );
    pParse->sLastToken.z = (u8*)&zSql[i];
    assert( pParse->sLastToken.dyn==0 );

    pParse->sLastToken.n = sqlite3GetToken((unsigned char*)&zSql[i],&tokenType);
    i += pParse->sLastToken.n;
    if( i>mxSqlLen ){
      pParse->rc = SQLITE_TOOBIG;
      break;
    }
    switch( tokenType ){
................................................................................
** An tokenizer for SQL
**
** This file contains C code that implements the sqlite3_complete() API.
** This code used to be part of the tokenizer.c source file.  But by
** separating it out, the code will be automatically omitted from
** static links that do not use it.
**
** $Id: complete.c,v 1.7 2008/06/13 18:24:27 drh Exp $
*/
#ifndef SQLITE_OMIT_COMPLETE

/*
** This is defined in tokenize.c.  We just have to import the definition.
*/
#ifndef SQLITE_AMALGAMATION
................................................................................
  ** statement.  This is the normal case.
  */
  static const u8 trans[7][8] = {
                     /* Token:                                                */
     /* State:       **  SEMI  WS  OTHER EXPLAIN  CREATE  TEMP  TRIGGER  END  */
     /* 0   START: */ {    0,  0,     1,      2,      3,    1,       1,   1,  },
     /* 1  NORMAL: */ {    0,  1,     1,      1,      1,    1,       1,   1,  },
     /* 2 EXPLAIN: */ {    0,  2,     1,      1,      3,    1,       1,   1,  },
     /* 3  CREATE: */ {    0,  3,     1,      1,      1,    3,       4,   1,  },
     /* 4 TRIGGER: */ {    5,  4,     4,      4,      4,    4,       4,   4,  },
     /* 5    SEMI: */ {    5,  5,     4,      4,      4,    4,       4,   6,  },
     /* 6     END: */ {    0,  6,     4,      4,      4,    4,       4,   4,  },
  };
#else
  /* If triggers are not suppored by this compile then the statement machine
................................................................................
**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.534 2009/03/23 04:33:32 danielk1977 Exp $
*/

#ifdef SQLITE_ENABLE_FTS3
/************** Include fts3.h in the middle of main.c ***********************/
/************** Begin file fts3.h ********************************************/
/*
** 2006 Oct 10
................................................................................
  */
  sqlite3_mutex_enter(sqlite3GlobalConfig.pInitMutex);
  if( sqlite3GlobalConfig.isInit==0 && sqlite3GlobalConfig.inProgress==0 ){
    FuncDefHash *pHash = &GLOBAL(FuncDefHash, sqlite3GlobalFunctions);
    sqlite3GlobalConfig.inProgress = 1;
    memset(pHash, 0, sizeof(sqlite3GlobalFunctions));
    sqlite3RegisterGlobalFunctions();


    rc = sqlite3_os_init();

    if( rc==SQLITE_OK ){
      rc = sqlite3PcacheInitialize();
      sqlite3PCacheBufferSetup( sqlite3GlobalConfig.pPage, 
          sqlite3GlobalConfig.szPage, sqlite3GlobalConfig.nPage);

    }
    sqlite3GlobalConfig.inProgress = 0;
    sqlite3GlobalConfig.isInit = (rc==SQLITE_OK ? 1 : 0);
  }
  sqlite3_mutex_leave(sqlite3GlobalConfig.pInitMutex);

  /* Go back under the static mutex and clean up the recursive
  ** mutex to prevent a resource leak.
  */
  sqlite3_mutex_enter(pMaster);
................................................................................
  return rc;
}

/*
** Undo the effects of sqlite3_initialize().  Must not be called while
** there are outstanding database connections or memory allocations or
** while any part of SQLite is otherwise in use in any thread.  This
** routine is not threadsafe.  Not by a long shot.


*/
SQLITE_API int sqlite3_shutdown(void){

  sqlite3GlobalConfig.isMallocInit = 0;
  sqlite3PcacheShutdown();
  if( sqlite3GlobalConfig.isInit ){
    sqlite3_os_end();
  }

  sqlite3MallocEnd();
  sqlite3MutexEnd();
  sqlite3GlobalConfig.isInit = 0;

  return SQLITE_OK;
}

/*
** This API allows applications to modify the global configuration of
** the SQLite library at run-time.
**
................................................................................
  }
  db->lookaside.pStart = pStart;
  db->lookaside.pFree = 0;
  db->lookaside.sz = (u16)sz;
  if( pStart ){
    int i;
    LookasideSlot *p;
    assert( sz > sizeof(LookasideSlot*) );
    p = (LookasideSlot*)pStart;
    for(i=cnt-1; i>=0; i--){
      p->pNext = db->lookaside.pFree;
      db->lookaside.pFree = p;
      p = (LookasideSlot*)&((u8*)p)[sz];
    }
    db->lookaside.pEnd = p;
................................................................................
}

/*
** Return a static string that describes the kind of error specified in the
** argument.
*/
SQLITE_PRIVATE const char *sqlite3ErrStr(int rc){
  const char *z;
  switch( rc & 0xff ){
    case SQLITE_ROW:
    case SQLITE_DONE:
    case SQLITE_OK:         z = "not an error";                          break;
    case SQLITE_ERROR:      z = "SQL logic error or missing database";   break;
    case SQLITE_PERM:       z = "access permission denied";              break;
    case SQLITE_ABORT:      z = "callback requested query abort";        break;
    case SQLITE_BUSY:       z = "database is locked";                    break;

    case SQLITE_LOCKED:     z = "database table is locked";              break;
    case SQLITE_NOMEM:      z = "out of memory";                         break;

    case SQLITE_READONLY:   z = "attempt to write a readonly database";  break;
    case SQLITE_INTERRUPT:  z = "interrupted";                           break;
    case SQLITE_IOERR:      z = "disk I/O error";                        break;


    case SQLITE_CORRUPT:    z = "database disk image is malformed";      break;

    case SQLITE_FULL:       z = "database or disk is full";              break;
    case SQLITE_CANTOPEN:   z = "unable to open database file";          break;

    case SQLITE_EMPTY:      z = "table contains no data";                break;
    case SQLITE_SCHEMA:     z = "database schema has changed";           break;
    case SQLITE_TOOBIG:     z = "String or BLOB exceeded size limit";    break;
    case SQLITE_CONSTRAINT: z = "constraint failed";                     break;
    case SQLITE_MISMATCH:   z = "datatype mismatch";                     break;
    case SQLITE_MISUSE:     z = "library routine called out of sequence";break;
    case SQLITE_NOLFS:      z = "large file support is disabled";        break;
    case SQLITE_AUTH:       z = "authorization denied";                  break;
    case SQLITE_FORMAT:     z = "auxiliary database format error";       break;
    case SQLITE_RANGE:      z = "bind or column index out of range";     break;
    case SQLITE_NOTADB:     z = "file is encrypted or is not a database";break;
    default:                z = "unknown error";                         break;
  }


  return z;



}

/*
** This routine implements a busy callback that sleeps and tries
** again until a timeout value is reached.  The timeout value is
** an integer number of milliseconds passed in as the first
** argument.
................................................................................

  assert( sqlite3_mutex_held(db->mutex) );
  if( zFunctionName==0 ||
      (xFunc && (xFinal || xStep)) || 
      (!xFunc && (xFinal && !xStep)) ||
      (!xFunc && (!xFinal && xStep)) ||
      (nArg<-1 || nArg>SQLITE_MAX_FUNCTION_ARG) ||
      (255<(nName = sqlite3Strlen(db, zFunctionName))) ){
    sqlite3Error(db, SQLITE_ERROR, "bad parameters");
    return SQLITE_ERROR;
  }
  
#ifndef SQLITE_OMIT_UTF16
  /* If SQLITE_UTF16 is specified as the encoding type, transform this
  ** to one of SQLITE_UTF16LE or SQLITE_UTF16BE using the
................................................................................
** properly.
*/
SQLITE_API int sqlite3_overload_function(
  sqlite3 *db,
  const char *zName,
  int nArg
){
  int nName = sqlite3Strlen(db, zName);
  int rc;
  sqlite3_mutex_enter(db->mutex);
  if( sqlite3FindFunction(db, zName, nName, nArg, SQLITE_UTF8, 0)==0 ){
    sqlite3CreateFunc(db, zName, nArg, SQLITE_UTF8,
                      0, sqlite3InvalidFunction, 0, 0);
  }
  rc = sqlite3ApiExit(db, SQLITE_OK);
................................................................................
  sqlite3_mutex_enter(db->mutex);
  pRet = db->pRollbackArg;
  db->xRollbackCallback = xCallback;
  db->pRollbackArg = pArg;
  sqlite3_mutex_leave(db->mutex);
  return pRet;
}

































/*
** This routine is called to create a connection to a database BTree
** driver.  If zFilename is the name of a file, then that file is
** opened and used.  If zFilename is the magic name ":memory:" then
** the database is stored in memory (and is thus forgotten as soon as
** the connection is closed.)  If zFilename is NULL then the database
** is a "virtual" database for transient use only and is deleted as
** soon as the connection is closed.
**
** A virtual database can be either a disk file (that is automatically
** deleted when the file is closed) or it an be held entirely in memory,
** depending on the values of the SQLITE_TEMP_STORE compile-time macro and the
** db->temp_store variable, according to the following chart:
**
**   SQLITE_TEMP_STORE     db->temp_store     Location of temporary database
**   -----------------     --------------     ------------------------------
**   0                     any                file
**   1                     1                  file
**   1                     2                  memory
**   1                     0                  file
**   2                     1                  file
**   2                     2                  memory
**   2                     0                  memory
**   3                     any                memory
*/
SQLITE_PRIVATE int sqlite3BtreeFactory(
  const sqlite3 *db,        /* Main database when opening aux otherwise 0 */
  const char *zFilename,    /* Name of the file containing the BTree database */
  int omitJournal,          /* if TRUE then do not journal this file */
  int nCache,               /* How many pages in the page cache */
  int vfsFlags,             /* Flags passed through to vfsOpen */
................................................................................
  assert( ppBtree != 0);
  if( omitJournal ){
    btFlags |= BTREE_OMIT_JOURNAL;
  }
  if( db->flags & SQLITE_NoReadlock ){
    btFlags |= BTREE_NO_READLOCK;
  }
  if( zFilename==0 ){
#if SQLITE_TEMP_STORE==0
    /* Do nothing */
#endif
#ifndef SQLITE_OMIT_MEMORYDB
#if SQLITE_TEMP_STORE==1
    if( db->temp_store==2 ) zFilename = ":memory:";
#endif
#if SQLITE_TEMP_STORE==2
    if( db->temp_store!=1 ) zFilename = ":memory:";
#endif
#if SQLITE_TEMP_STORE==3

    zFilename = ":memory:";
#endif
#endif /* SQLITE_OMIT_MEMORYDB */
  }


  if( (vfsFlags & SQLITE_OPEN_MAIN_DB)!=0 && (zFilename==0 || *zFilename==0) ){
    vfsFlags = (vfsFlags & ~SQLITE_OPEN_MAIN_DB) | SQLITE_OPEN_TEMP_DB;
  }
  rc = sqlite3BtreeOpen(zFilename, (sqlite3 *)db, ppBtree, btFlags, vfsFlags);

  /* If the B-Tree was successfully opened, set the pager-cache size to the
................................................................................
  
  assert( sqlite3_mutex_held(db->mutex) );

  /* If SQLITE_UTF16 is specified as the encoding type, transform this
  ** to one of SQLITE_UTF16LE or SQLITE_UTF16BE using the
  ** SQLITE_UTF16NATIVE macro. SQLITE_UTF16 is not used internally.
  */
  enc2 = enc & ~SQLITE_UTF16_ALIGNED;
  if( enc2==SQLITE_UTF16 ){


    enc2 = SQLITE_UTF16NATIVE;
  }
  if( (enc2&~3)!=0 ){

    return SQLITE_MISUSE;
  }

  /* Check if this call is removing or replacing an existing collation 
  ** sequence. If so, and there are active VMs, return busy. If there
  ** are no active VMs, invalidate any pre-compiled statements.
  */
  nName = sqlite3Strlen(db, zName);
  pColl = sqlite3FindCollSeq(db, (u8)enc2, zName, nName, 0);
  if( pColl && pColl->xCmp ){
    if( db->activeVdbeCnt ){
      sqlite3Error(db, SQLITE_BUSY, 
        "unable to delete/modify collation sequence due to active statements");
      return SQLITE_BUSY;
    }
................................................................................
  const char *zVfs       /* Name of the VFS to use */
){
  sqlite3 *db;
  int rc;
  CollSeq *pColl;
  int isThreadsafe;


#ifndef SQLITE_OMIT_AUTOINIT
  rc = sqlite3_initialize();
  if( rc ) return rc;
#endif

  if( sqlite3GlobalConfig.bCoreMutex==0 ){
    isThreadsafe = 0;
................................................................................
#if SQLITE_DEFAULT_FILE_FORMAT<4
                 | SQLITE_LegacyFileFmt
#endif
#ifdef SQLITE_ENABLE_LOAD_EXTENSION
                 | SQLITE_LoadExtension
#endif
      ;
  sqlite3HashInit(&db->aCollSeq, 0);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3HashInit(&db->aModule, 0);
#endif

  db->pVfs = sqlite3_vfs_find(zVfs);
  if( !db->pVfs ){
    rc = SQLITE_ERROR;
    sqlite3Error(db, rc, "no such vfs: %s", zVfs);
    goto opendb_out;
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains the implementation of the sqlite3_unlock_notify()
** API method and its associated functionality.
**
** $Id: notify.c,v 1.2 2009/03/25 16:51:43 drh Exp $
*/

/* Omit this entire file if SQLITE_ENABLE_UNLOCK_NOTIFY is not defined. */
#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY

/*
** Public interfaces:
................................................................................
  db->pNextBlocked = *pp;
  *pp = db;
}

/*
** Obtain the STATIC_MASTER mutex.
*/
static void enterMutex(){
  sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
  checkListProperties(0);
}

/*
** Release the STATIC_MASTER mutex.
*/
static void leaveMutex(){
  assertMutexHeld();
  checkListProperties(0);
  sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
}

/*
** Register an unlock-notify callback.


















*/
SQLITE_API int sqlite3_unlock_notify(
  sqlite3 *db,
  void (*xNotify)(void **, int),
  void *pArg
){
  int rc = SQLITE_OK;

  sqlite3_mutex_enter(db->mutex);
  enterMutex();






  if( 0==db->pBlockingConnection ){
    /* The blocking transaction has been concluded. Or there never was a 
    ** blocking transaction. In either case, invoke the notify callback
    ** immediately. 
    */
    xNotify(&pArg, 1);
  }else{
    sqlite3 *p;

    for(p=db->pBlockingConnection; p && p!=db; p=p->pUnlockConnection);
    if( p ){
      rc = SQLITE_LOCKED;              /* Deadlock detected. */
    }else{
      db->pUnlockConnection = db->pBlockingConnection;
      db->xUnlockNotify = xNotify;
      db->pUnlockArg = pArg;
      removeFromBlockedList(db);
................................................................................
    addToBlockedList(db);
  }
  db->pBlockingConnection = pBlocker;
  leaveMutex();
}

/*

** The transaction opened by database db has just finished. Locks held 
** by database connection db have been released.
**
** This function loops through each entry in the blocked connections
** list and does the following:
**
**   1) If the sqlite3.pBlockingConnection member of a list entry is
**      set to db, then set pBlockingConnection=0.
................................................................................
**      pUnlockConnection==0, remove the entry from the blocked connections
**      list.
*/
SQLITE_PRIVATE void sqlite3ConnectionUnlocked(sqlite3 *db){
  void (*xUnlockNotify)(void **, int) = 0; /* Unlock-notify cb to invoke */
  int nArg = 0;                            /* Number of entries in aArg[] */
  sqlite3 **pp;                            /* Iterator variable */




  void *aStatic[16];
  void **aArg = aStatic;
  void **aDyn = 0;

  enterMutex();         /* Enter STATIC_MASTER mutex */

  /* This loop runs once for each entry in the blocked-connections list. */
  for(pp=&sqlite3BlockedList; *pp; /* no-op */ ){
    sqlite3 *p = *pp;

    /* Step 1. */


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1
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19
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21
22
23
24
25
26
27
..
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
...
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
...
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
...
494
495
496
497
498
499
500














501
502
503
504
505
506
507
...
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
...
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
...
880
881
882
883
884
885
886

887
888
889
890
891
892
893
...
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
....
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
....
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
....
1754
1755
1756
1757
1758
1759
1760




1761





1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788











1789
1790
1791
1792
1793
1794
1795
1796
1797
....
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
....
2290
2291
2292
2293
2294
2295
2296
2297






2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
....
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
....
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
....
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
....
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
....
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
....
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
....
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
....
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
....
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689



4690
4691
4692
4693
4694
4695
4696
....
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785






4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810



4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824



4825
4826
4827
4828
4829
4830
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4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843



4844
4845
4846
4847
4848
4849
4850
....
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085

6086
6087
6088
6089
6090
6091
6092
6093
....
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112

6113
6114
6115
6116
6117
6118
6119
....
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
....
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
....
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
....
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
....
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
....
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820

6821




6822
6823
6824



6825
6826
6827
6828
6829
6830
6831
6832
6833
6834

6835




6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
....
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
....
7010
7011
7012
7013
7014
7015
7016

7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
....
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
....
7215
7216
7217
7218
7219
7220
7221
7222

7223
7224
7225
7226
7227
7228
7229
....
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
....
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
....
7952
7953
7954
7955
7956
7957
7958

7959
7960
7961
7962
7963
7964
7965
....
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
....
8199
8200
8201
8202
8203
8204
8205

8206
8207
8208
8209
8210
8211
8212
....
8507
8508
8509
8510
8511
8512
8513
8514






8515
8516
8517
8518
8519

8520




8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
....
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
....
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
....
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778

8779
8780
8781
8782
8783
8784
8785
....
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
....
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
....
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870

8871
8872
8873
8874
8875
8876
8877

8878
8879
8880
8881
8882
8883
8884
....
9050
9051
9052
9053
9054
9055
9056
9057
9058
9059
9060
9061
9062
9063
9064
9065
9066
9067
9068
9069
9070
9071
9072
9073
9074
9075
9076
9077
9078
9079

9080
9081
9082
9083
9084
9085
9086
....
9200
9201
9202
9203
9204
9205
9206
9207
9208
9209
9210
9211
9212
9213
9214
9215
9216
9217
9218
9219
9220
....
9243
9244
9245
9246
9247
9248
9249
9250
9251
9252
9253
9254
9255
9256
9257
9258
9259
9260

9261
9262
9263
9264
9265
9266
9267
9268
9269
....
9313
9314
9315
9316
9317
9318
9319
9320
9321
9322
9323
9324
9325
9326
9327
9328
9329
9330
9331
9332
9333
....
9610
9611
9612
9613
9614
9615
9616

9617
9618
9619
9620
9621
9622
9623
....
9668
9669
9670
9671
9672
9673
9674
9675

9676
9677
9678
9679
9680
9681
9682
....
9716
9717
9718
9719
9720
9721
9722
9723
9724
9725
9726
9727
9728
9729
9730
....
9758
9759
9760
9761
9762
9763
9764
9765
9766
9767
9768
9769
9770
9771
9772
9773
9774
9775
9776
9777
9778
9779
9780
9781
9782
....
9810
9811
9812
9813
9814
9815
9816
9817
9818
9819
9820
9821
9822
9823
9824
9825
....
9865
9866
9867
9868
9869
9870
9871
9872
9873
9874
9875
9876
9877
9878
9879
....
9897
9898
9899
9900
9901
9902
9903
9904
9905
9906
9907
9908
9909
9910
9911
.....
10072
10073
10074
10075
10076
10077
10078
10079
10080
10081
10082
10083
10084
10085
10086
10087
.....
10496
10497
10498
10499
10500
10501
10502
10503
10504
10505
10506
10507
10508
10509
10510
.....
10821
10822
10823
10824
10825
10826
10827
10828
10829
10830
10831
10832
10833
10834
10835
10836
10837
10838
10839
10840
10841
10842
10843
.....
11027
11028
11029
11030
11031
11032
11033
11034
11035
11036
11037
11038
11039
11040
11041
.....
11431
11432
11433
11434
11435
11436
11437
11438
11439
11440
11441
11442
11443
11444
11445
11446
.....
15013
15014
15015
15016
15017
15018
15019
15020
15021
15022
15023
15024
15025
15026
15027
.....
15650
15651
15652
15653
15654
15655
15656
15657
15658
15659
15660
15661
15662
15663
15664
.....
15725
15726
15727
15728
15729
15730
15731
15732
15733
15734
15735
15736
15737
15738
15739
.....
15796
15797
15798
15799
15800
15801
15802
15803
15804
15805
15806
15807
15808
15809
15810
15811
.....
15854
15855
15856
15857
15858
15859
15860
15861
15862
15863
15864
15865
15866
15867
15868
15869
15870
.....
16059
16060
16061
16062
16063
16064
16065
16066
16067
16068
16069
16070
16071
16072
16073
16074
16075
16076
16077
16078
16079



16080
16081
16082
16083
16084
16085
16086
.....
16110
16111
16112
16113
16114
16115
16116
16117
16118
16119
16120
16121
16122
16123
16124
16125
16126
16127
16128
16129
16130
16131
16132
16133
16134
16135
16136
16137
16138
16139
16140
16141
16142
16143
16144
16145
16146
16147
.....
16417
16418
16419
16420
16421
16422
16423
16424
16425
16426
16427
16428
16429
16430
16431
16432
16433
16434
.....
16455
16456
16457
16458
16459
16460
16461
16462
16463
16464
16465
16466
16467
16468
16469
16470
16471
16472
16473
16474
16475
16476
16477
16478
.....
16553
16554
16555
16556
16557
16558
16559
16560
16561
16562
16563
16564
16565
16566
16567
16568
16569
16570
16571
16572
16573
.....
16838
16839
16840
16841
16842
16843
16844
16845
16846
16847
16848
16849
16850
16851
16852
.....
16880
16881
16882
16883
16884
16885
16886
16887
16888
16889
16890
16891
16892
16893
16894
.....
16944
16945
16946
16947
16948
16949
16950
16951
16952
16953
16954
16955
16956
16957
16958
16959
16960
16961
.....
17247
17248
17249
17250
17251
17252
17253
17254
17255
17256
17257
17258
17259
17260
17261
17262
17263
17264
17265
17266
.....
17343
17344
17345
17346
17347
17348
17349
17350
17351
17352
17353

17354
17355
17356
17357
17358
17359
17360
17361
17362
17363

17364
17365
17366
17367
17368
17369
17370
.....
17399
17400
17401
17402
17403
17404
17405
17406

17407
17408
17409

17410
17411
17412
17413
17414
17415
17416
17417
17418
17419
17420
17421
17422
17423
17424
17425
17426
17427
17428
17429
17430
17431
.....
17584
17585
17586
17587
17588
17589
17590
17591
17592
17593
17594
17595
17596
17597
17598
17599
.....
17651
17652
17653
17654
17655
17656
17657

17658
17659
17660
17661
17662
17663
17664
17665
17666
17667
17668
.....
17688
17689
17690
17691
17692
17693
17694
17695


17696

17697
17698
17699
17700
17701
17702
17703
17704
17705
17706
17707
17708
17709
17710
17711
17712
17713
17714
17715
17716
17717
17718
17719
17720
17721
17722
17723
17724
17725
17726
17727
17728
17729
17730
17731
17732
17733
17734
17735

17736
17737
17738
17739
17740
17741
17742
17743
17744

17745
17746
17747
17748
17749
17750
17751
17752
17753
.....
17792
17793
17794
17795
17796
17797
17798
17799
17800
17801
17802
17803
17804
17805
17806
17807
17808
.....
17829
17830
17831
17832
17833
17834
17835
17836
17837
17838
17839
17840
17841
17842
17843
17844
17845
17846
17847
17848
17849
17850
17851
17852
17853
17854
17855
17856
.....
17864
17865
17866
17867
17868
17869
17870
17871
17872
17873
17874
17875
17876
17877
17878
17879
17880
17881
17882
17883
17884
17885
17886
17887
17888
17889
17890
17891
17892


















17893
17894
17895
17896
17897
17898
17899
.....
17944
17945
17946
17947
17948
17949
17950
17951
17952
17953
17954
17955
17956
17957
17958
.....
17968
17969
17970
17971
17972
17973
17974
17975
17976
17977
17978
17979
17980
17981
17982
17983
17984
17985
17986
17987
17988
17989
17990
17991
17992
17993
17994
17995
17996
17997
17998
17999
18000
18001
18002
18003
18004

18005
18006
18007
18008
18009
18010
18011
18012
18013
18014
18015
18016
18017
18018
18019
.....
18031
18032
18033
18034
18035
18036
18037
18038
18039
18040
18041
18042
18043

18044
18045
18046
18047
18048
18049
18050
18051
18052
18053
18054
18055
18056
18057
18058
18059
18060
18061
18062
18063
18064
18065
18066
18067
18068
18069
18070
18071
18072
18073
18074
18075
18076
18077
18078
.....
18223
18224
18225
18226
18227
18228
18229
18230
18231
18232
18233
18234
18235
18236
18237
18238
18239
18240
18241
18242
18243
18244
18245

18246
18247



18248
18249
18250
18251
18252
18253
18254
18255
.....
18546
18547
18548
18549
18550
18551
18552
18553
18554
18555
18556
18557
18558
18559
18560
18561
18562
18563
18564
18565
18566
18567
18568
18569
18570
18571
18572
18573
18574
18575
18576
18577
18578
18579
18580
18581
18582
18583
18584
18585
18586
18587
18588
18589
18590
18591
18592
18593
18594
18595
18596
18597
18598
18599
18600
18601
18602
18603
18604
18605
18606
18607
18608
18609
18610
18611
18612
18613
18614
18615
18616
18617
18618
18619
18620
18621
18622
18623
18624
18625
18626
18627
18628
18629
18630
18631
18632
18633
18634
18635
18636
18637
18638
18639
18640
18641
18642
18643
18644
18645
18646
18647
.....
18655
18656
18657
18658
18659
18660
18661
18662
18663
18664
18665
18666
18667
18668
18669
18670
18671
18672
18673
18674
18675
18676
18677
18678
18679
18680
18681
.....
18805
18806
18807
18808
18809
18810
18811
18812
18813
18814
18815
18816
18817
18818
18819
18820
18821
18822
18823

18824
18825
18826
18827
18828
18829
18830
.....
18840
18841
18842
18843
18844
18845
18846
18847
18848
18849
18850
18851
18852
18853


18854
18855
18856

18857
18858
18859
18860
18861
18862
18863
.....
18871
18872
18873
18874
18875
18876
18877



18878
18879
18880
18881
18882
18883
18884
18885
18886
18887

18888

18889
18890
18891
18892
18893
18894




18895
18896
18897
18898
18899
18900
18901
18902
18903
18904
18905
18906
18907
18908
18909
18910
18911
18912
18913
18914
18915
18916
18917
18918
18919
18920
18921
18922
18923
18924
18925


18926
18927
18928
18929
18930
18931
18932
18933
18934
18935
18936
18937
18938
18939
18940
18941
18942
18943
18944
18945
18946
18947
18948

18949
18950
18951
18952
18953
18954
18955
18956
18957
18958
18959
18960
18961
18962
18963
18964
18965
18966
18967
18968
18969
18970
18971
18972
18973
18974
18975
18976
18977
18978
18979
18980
18981
18982
18983
18984
18985
18986
18987
18988

18989
18990
18991
18992

18993
18994
18995
18996
18997
18998
18999
19000
19001
19002
19003
19004
19005
19006
19007
19008
19009
19010
19011
19012
19013
19014
19015
19016
19017
19018
19019
19020




19021
19022
19023
19024
19025
19026
19027
19028
19029
19030















19031
19032
19033
19034
19035
19036
19037
19038
19039
19040
19041
19042
19043
19044
19045
19046
19047
19048
19049
19050
19051
19052
19053
19054

19055
19056
19057
19058
19059
19060
19061
19062
19063
19064
19065

19066
19067
19068
19069
19070
19071
19072
19073
19074
19075
19076
19077
19078
19079
19080
19081
19082
19083
19084

19085

19086
19087
19088

19089
19090
19091
19092








19093

19094
19095
19096
19097
19098
19099





19100


19101




19102

19103

19104
19105
19106
19107
19108
19109
19110
19111
19112
19113
.....
19121
19122
19123
19124
19125
19126
19127
19128
19129
19130
19131
19132
19133
19134
19135
19136
19137
19138
19139
19140
19141
19142
19143
19144
19145
19146
19147
19148
19149
19150
19151
19152
19153
19154
19155
19156
19157
19158
19159
19160
19161
19162
19163
19164
19165
19166
19167
19168
19169
19170
19171
19172
19173
19174
19175
19176
19177
19178
19179
19180
19181
19182
19183
19184
19185
19186
19187
19188
19189
19190
19191
19192
19193
19194
19195
19196
19197
19198
19199
19200
19201
19202
19203
19204
19205
19206
19207
19208
19209
19210
19211
19212
19213
19214
19215
19216
19217
19218
19219
19220
19221
19222
19223
19224
19225
19226
19227
19228
19229
19230
19231
19232
19233
19234
19235
19236
.....
20657
20658
20659
20660
20661
20662
20663
20664
20665
20666
20667
20668
20669
20670
20671
.....
23047
23048
23049
23050
23051
23052
23053

23054
23055
23056
23057
23058
23059
23060
23061
23062
.....
24041
24042
24043
24044
24045
24046
24047
24048
24049
24050
24051
24052
24053
24054
24055
.....
24165
24166
24167
24168
24169
24170
24171
24172
24173
24174
24175
24176
24177
24178
24179
24180
24181
24182
24183
24184
24185
24186
24187
24188
24189
24190
24191
24192
24193
24194
24195
24196
24197
24198
24199
24200
24201
24202
24203
24204
24205
24206
24207
24208
24209
24210
24211
24212
24213
24214
24215
24216
.....
24485
24486
24487
24488
24489
24490
24491
24492
24493
24494
24495
24496
24497
24498
24499
.....
24588
24589
24590
24591
24592
24593
24594
24595
24596
24597
24598
24599
24600
24601
24602
.....
25933
25934
25935
25936
25937
25938
25939
25940
25941
25942
25943
25944
25945
25946
25947
25948
25949
25950
25951
25952
25953
25954
25955
25956
25957
25958
25959
25960
25961
.....
25992
25993
25994
25995
25996
25997
25998
25999
26000
26001
26002
26003
26004
26005
26006
.....
27513
27514
27515
27516
27517
27518
27519
27520
27521
27522
27523
27524
27525
27526
27527
27528
27529
27530
27531
27532
27533
27534
27535

27536



27537
27538
27539
27540
27541
27542
27543
.....
27795
27796
27797
27798
27799
27800
27801
27802
27803
27804
27805
27806
27807
27808
27809
27810
27811
27812
27813
27814

27815
27816

27817
27818

27819
27820
27821
27822
27823

27824
27825

27826
27827
27828
27829

27830
27831

27832
27833

27834
27835
27836
27837
27838

27839
27840

27841
27842
27843
27844
27845
27846
27847
27848
27849
.....
28117
28118
28119
28120
28121
28122
28123
28124
28125
28126
28127
28128
28129
28130
28131
.....
28176
28177
28178
28179
28180
28181
28182
28183
28184
28185
28186
28187
28188
28189
28190
28191
28192
.....
28460
28461
28462
28463
28464
28465
28466
28467
28468
28469
28470
28471
28472
28473
28474
28475
.....
29081
29082
29083
29084
29085
29086
29087
29088
29089
29090
29091
29092
29093
29094
29095
.....
29591
29592
29593
29594
29595
29596
29597
29598
29599
29600
29601
29602
29603
29604
29605
.....
29829
29830
29831
29832
29833
29834
29835
29836
29837
29838
29839
29840
29841

29842
29843
29844
29845

29846
29847
29848
29849
29850
29851
29852
29853
29854
29855
29856
29857
29858
29859
29860
29861
29862
29863
29864
29865
29866
29867
29868
29869
29870
29871
29872
29873
29874
29875
29876
29877
29878
29879
29880
29881
29882
29883
29884
29885
29886
29887
29888
29889
29890
29891
29892
29893
29894
29895
29896
29897
29898
29899
29900
29901
29902

29903
29904
29905
29906
29907
29908
29909
29910
29911
29912
29913
29914
29915
29916
29917
29918
29919
29920
29921
29922
29923
29924
29925
29926
29927
29928
29929
29930
29931
29932
29933
29934
29935
29936
29937
29938
29939
29940
29941
29942
.....
29951
29952
29953
29954
29955
29956
29957
29958
29959
29960
29961
29962
29963
29964
29965
29966
29967
29968
29969
29970
29971
29972
29973
29974
29975
29976
29977
29978
29979
29980
29981
29982
29983
29984
29985
29986
29987
29988
29989
29990
29991
29992
29993
29994
29995
29996
29997
29998
29999
30000
30001
30002
30003
30004
30005
30006
30007
30008
30009
30010
30011
30012
30013
30014
30015
30016
30017
30018
30019
30020
30021
30022
30023
30024
30025
30026
30027
30028
30029
30030
30031
30032
30033
30034
30035
30036
30037
30038
30039
30040
30041
30042
30043
30044
30045
30046
30047
30048
30049
30050
30051
30052
30053
30054
30055
30056
30057
30058
30059
30060
30061
30062
30063
30064
30065
30066
30067
30068
30069
30070
30071
30072
30073
30074
30075
30076
30077
30078
30079
30080
30081
30082
30083
30084
30085
30086
30087
30088
30089
30090
30091
30092
30093
30094
30095
30096
30097
30098
30099
30100
30101
30102
30103
30104
30105
30106
30107
30108
30109
30110
30111
30112
30113
30114
30115
30116
30117
30118
30119
30120
30121
30122
30123
30124
30125
30126
30127
30128
30129
30130
30131
30132
30133
30134
30135
30136
30137
30138
30139
30140
30141
30142
30143
30144
30145
30146
30147
30148
30149
30150
30151
30152
30153
30154
30155
30156
30157
30158
30159
30160
30161
30162
30163
30164
30165
30166
30167
30168
30169
30170
30171
30172
30173
30174
30175
30176
30177
30178
30179
30180
30181
30182
30183
30184
30185
30186
30187
30188
30189
30190
30191
30192
30193
30194
30195
30196
30197
30198
30199
30200
30201
30202
30203
30204
30205
30206



30207
30208
30209
30210
30211
30212
30213
30214
30215
30216
30217
30218
30219
30220
30221
30222
30223
30224
30225
30226
30227
30228
30229
30230
30231
30232
30233
30234
30235
30236
30237
30238
30239
30240
30241
30242
30243
30244
30245
30246
30247
30248
30249
30250
30251
30252
30253
.....
30263
30264
30265
30266
30267
30268
30269
30270
30271
30272
30273
30274
30275
30276
30277
.....
30473
30474
30475
30476
30477
30478
30479
30480
30481
30482
30483
30484
30485
30486
30487
30488
30489
30490
30491
30492
.....
30512
30513
30514
30515
30516
30517
30518
30519
30520
30521
30522
30523
30524
30525
30526
.....
31292
31293
31294
31295
31296
31297
31298
31299
31300
31301
31302
31303
31304
31305
31306
31307
31308
31309
31310
31311
31312
31313
31314
31315
31316
31317
31318
31319
31320
.....
31542
31543
31544
31545
31546
31547
31548
31549
31550
31551
31552
31553
31554
31555
31556
31557
31558
31559
31560
.....
32280
32281
32282
32283
32284
32285
32286
32287
32288
32289
32290
32291

32292
32293
32294
32295
32296
32297
32298
.....
33370
33371
33372
33373
33374
33375
33376
33377
33378
33379
33380
33381
33382
33383
33384
33385
33386
.....
33428
33429
33430
33431
33432
33433
33434
33435
33436
33437
33438
33439
33440
33441
33442
33443
33444
33445
33446
33447
33448
33449
33450
33451
33452
33453
33454
33455
33456
33457
33458
33459
33460
.....
33920
33921
33922
33923
33924
33925
33926
33927
33928
33929
33930
33931
33932
33933
33934
33935
33936
33937
33938
33939
33940
33941
33942
.....
34156
34157
34158
34159
34160
34161
34162
34163
34164
34165
34166
34167
34168
34169
34170
.....
34275
34276
34277
34278
34279
34280
34281
34282
34283
34284
34285
34286
34287
34288
34289
34290
34291
34292
34293
34294
34295
34296
34297
34298
34299
34300
34301
.....
34372
34373
34374
34375
34376
34377
34378
34379
34380
34381
34382
34383
34384
34385
34386
.....
35347
35348
35349
35350
35351
35352
35353
35354
35355
35356
35357
35358




35359
35360
35361
35362
35363
35364
35365
.....
35455
35456
35457
35458
35459
35460
35461
35462
35463
35464
35465
35466
35467
35468
35469
35470
35471
35472
35473

35474
35475
35476
35477
35478
35479
35480
35481


35482
35483
35484
35485
35486
35487
35488
35489
35490
35491
35492
35493
35494
35495
35496
35497
35498
35499
35500
35501
35502
35503
35504
35505
35506
.....
35527
35528
35529
35530
35531
35532
35533
35534
35535
35536
35537
35538
35539
35540
35541
.....
36179
36180
36181
36182
36183
36184
36185
36186
36187
36188
36189
36190
36191
36192
36193
36194
36195
36196
36197
36198
36199
36200
36201
36202
36203
36204
36205
36206
36207
36208
36209
36210
36211
36212
36213
36214
36215
36216
36217
36218
36219
36220
36221
36222
36223
.....
36247
36248
36249
36250
36251
36252
36253
36254
36255
36256
36257
36258
36259
36260
36261
36262
36263
36264
36265
36266
36267
36268
36269
36270
36271
36272
36273
36274
.....
36275
36276
36277
36278
36279
36280
36281
36282

36283
36284


36285
36286
36287


36288
36289
36290
36291
36292
36293
36294
36295
36296
36297
36298
36299
36300
36301


36302
36303
36304
36305
36306
36307
36308
36309


36310
36311
36312
36313
36314
36315
36316
36317
36318
36319
36320
36321
36322
36323
36324
36325
36326
.....
36352
36353
36354
36355
36356
36357
36358
36359
36360
36361
36362
36363
36364
36365
36366
36367
36368

36369
36370
36371
36372

36373
36374
36375
36376
36377
36378
36379
.....
36382
36383
36384
36385
36386
36387
36388
36389


36390
36391
36392
36393
36394
36395
36396
.....
36471
36472
36473
36474
36475
36476
36477
36478

36479
36480
36481
36482
36483
36484
36485
.....
36493
36494
36495
36496
36497
36498
36499
36500

36501
36502
36503
36504
36505
36506
36507
36508
36509
36510
36511
36512
36513
36514
36515
36516
36517
36518
36519
36520
36521
36522
36523
36524
36525
36526
.....
36527
36528
36529
36530
36531
36532
36533
36534
36535
36536
36537
36538
36539
36540
36541
.....
36620
36621
36622
36623
36624
36625
36626
36627
36628
36629
36630
36631
36632
36633
36634
36635
36636
36637
36638
36639
36640
.....
36662
36663
36664
36665
36666
36667
36668
36669
36670
36671
36672
36673
36674
36675
36676
36677
36678
36679
36680

36681
36682
36683
36684
36685
36686
36687
.....
36765
36766
36767
36768
36769
36770
36771
36772
36773
36774
36775
36776
36777
36778
36779
36780
36781
36782
36783
36784
36785
36786
36787
36788
36789
36790
36791
36792
36793
36794
36795
.....
37279
37280
37281
37282
37283
37284
37285

37286


37287
37288
37289
37290
37291
37292
37293
37294
37295
37296
37297
37298
37299
37300
37301
37302
37303
37304
37305
37306
37307
37308
37309
37310
37311
37312
37313
37314
37315
37316
37317
37318
37319
37320
37321
37322
37323
37324
37325
37326
37327
37328
37329
37330
37331
37332
37333
37334
37335
37336
37337
37338
37339
37340
37341
37342
37343
37344
37345
.....
37429
37430
37431
37432
37433
37434
37435
37436
37437
37438
37439

37440

37441
37442
37443


37444
37445
37446
37447
37448
37449
37450



37451
37452
37453
37454



37455

37456
37457
37458
37459
37460
37461

37462
37463
37464
37465
37466
37467
37468
37469
37470
37471
37472
37473
37474
37475


37476
37477
37478
37479
37480
37481
37482
37483

37484
37485
37486
37487
37488

37489
37490
37491
37492
37493
37494
37495


37496
37497
37498
37499
37500
37501
37502








37503

37504
37505
37506
37507
37508
37509
37510
.....
37884
37885
37886
37887
37888
37889
37890
37891
37892
37893
37894
37895
37896
37897
37898
37899
37900
37901
37902
.....
37918
37919
37920
37921
37922
37923
37924
37925
37926
37927
37928
37929
37930
37931
37932
37933
37934
37935
37936
37937
.....
37969
37970
37971
37972
37973
37974
37975


37976

37977
37978
37979
37980
37981
37982
37983
.....
37989
37990
37991
37992
37993
37994
37995
37996
37997
37998
37999
38000
38001
38002
38003
38004
38005
38006
38007
38008
38009
38010
38011
38012
38013
.....
38045
38046
38047
38048
38049
38050
38051
38052
38053
38054
38055
38056
38057
38058
38059
38060
38061
38062
38063

38064
38065
38066
38067
38068
38069
38070
.....
38078
38079
38080
38081
38082
38083
38084
38085
38086
38087
38088

38089
38090
38091
38092
38093
38094
38095
.....
38223
38224
38225
38226
38227
38228
38229

38230
38231
38232
38233
38234
38235
38236
.....
38332
38333
38334
38335
38336
38337
38338
38339
38340
38341
38342
38343
38344
38345
38346
38347
38348
38349
38350
38351
38352
38353
38354
38355
38356
38357
38358
38359
38360
38361
38362
38363
38364
.....
38372
38373
38374
38375
38376
38377
38378
38379
38380
38381
38382
38383
38384
38385
38386
.....
38473
38474
38475
38476
38477
38478
38479
38480
38481
38482
38483
38484
38485
38486
38487
.....
38525
38526
38527
38528
38529
38530
38531
38532
38533
38534
38535
38536
38537
38538
38539
38540
.....
38605
38606
38607
38608
38609
38610
38611








38612
38613
38614
38615
38616
38617
38618
.....
38694
38695
38696
38697
38698
38699
38700

38701
38702
38703
38704
38705
38706
38707
.....
38734
38735
38736
38737
38738
38739
38740
38741
38742
38743
38744
38745
38746
38747
38748

38749
38750
38751
38752
38753
38754
38755
38756
38757
38758
38759
38760
38761
.....
38840
38841
38842
38843
38844
38845
38846
38847
38848
38849
38850
38851
38852
38853
38854
.....
39003
39004
39005
39006
39007
39008
39009
39010
39011
39012
39013
39014
39015
39016
39017
39018
39019
39020
39021
39022
39023
39024
39025
.....
39112
39113
39114
39115
39116
39117
39118

39119
39120
39121
39122
39123
39124
39125
.....
39148
39149
39150
39151
39152
39153
39154
39155
39156
39157
39158
39159
39160
39161


39162
39163
39164
39165
39166
39167
39168
39169
39170
39171
39172
39173
.....
39197
39198
39199
39200
39201
39202
39203
39204
39205
39206
39207
39208
39209
39210
39211
.....
39218
39219
39220
39221
39222
39223
39224

39225
39226
39227
39228
39229
39230
39231
.....
39237
39238
39239
39240
39241
39242
39243
39244
39245
39246
39247
39248
39249
39250
39251
39252
39253
39254
39255
39256
39257
39258

39259
39260
39261
39262
39263
39264
39265
.....
39268
39269
39270
39271
39272
39273
39274

39275
39276
39277
39278
39279
39280
39281
39282
39283
39284
39285
39286
39287
39288
39289
39290
39291
39292
39293
39294
39295
39296
.....
39377
39378
39379
39380
39381
39382
39383

39384
39385
39386
39387
39388
39389
39390
.....
39391
39392
39393
39394
39395
39396
39397

39398
39399
39400
39401
39402
39403
39404
.....
39412
39413
39414
39415
39416
39417
39418
39419
39420
39421
39422
39423
39424
39425
39426
.....
39451
39452
39453
39454
39455
39456
39457

39458
39459
39460
39461
39462
39463
39464
.....
39489
39490
39491
39492
39493
39494
39495

39496
39497
39498
39499
39500
39501
39502
.....
39605
39606
39607
39608
39609
39610
39611

39612
39613
39614
39615
39616
39617
39618
.....
39662
39663
39664
39665
39666
39667
39668

39669
39670
39671
39672
39673
39674
39675
.....
40438
40439
40440
40441
40442
40443
40444
40445
40446
40447
40448
40449
40450
40451
40452
40453
40454
40455
40456
40457
40458
40459
40460
40461
40462
40463
40464
40465
40466
40467
40468
40469

40470
40471
40472
40473
40474
40475
40476
.....
40553
40554
40555
40556
40557
40558
40559


40560
40561
40562
40563
40564
40565
40566

40567
40568
40569
40570
40571
40572
40573
40574
40575
40576
40577
40578
40579
40580
40581
40582


40583
40584
40585
40586
40587
40588
40589
40590
40591
40592
40593
40594
40595
40596
40597
40598
40599
40600
40601
40602
40603
40604
40605
40606
40607
40608
40609
40610
40611
40612
40613
40614
40615
40616
40617
40618
40619
40620
40621
40622
40623

40624
40625
40626
40627
40628
40629
40630
.....
40633
40634
40635
40636
40637
40638
40639

40640
40641
40642
40643
40644
40645
40646
.....
40676
40677
40678
40679
40680
40681
40682
40683
40684
40685
40686
40687
40688
40689
40690
40691
.....
41278
41279
41280
41281
41282
41283
41284
41285
41286
41287
41288
41289
41290
41291
41292
41293
41294
41295
.....
41593
41594
41595
41596
41597
41598
41599
41600
41601
41602
41603
41604
41605
41606
41607
.....
41616
41617
41618
41619
41620
41621
41622
41623
41624
41625
41626
41627
41628
41629
41630
41631
41632
41633
41634
41635
41636
41637
41638
41639
41640
41641
41642
41643
41644
41645
41646
41647
41648







41649
41650
41651
41652
41653
41654
41655
.....
41953
41954
41955
41956
41957
41958
41959
41960
41961
41962
41963
41964
41965
41966
41967
41968
41969
41970
41971
41972
41973
.....
42673
42674
42675
42676
42677
42678
42679
42680
42681
42682
42683
42684
42685
42686
42687
42688
42689
42690
42691
42692
42693
42694
42695
42696
42697
42698
42699
42700
42701
42702
42703
42704
42705
42706
42707
42708
.....
42717
42718
42719
42720
42721
42722
42723
42724

42725
42726
42727
42728
42729
42730
42731
42732
42733
42734
42735
42736
42737
42738
42739
42740
42741
42742
42743
42744
42745
.....
42777
42778
42779
42780
42781
42782
42783
42784
42785
42786
42787
42788
42789
42790
42791
42792
42793
42794
42795
42796
42797
42798
42799
42800
42801
42802
42803
42804
42805
42806
42807
42808
42809
42810
42811
42812
42813
42814
42815
42816
42817
42818
42819



42820
42821
42822
42823
42824
42825
42826
.....
42991
42992
42993
42994
42995
42996
42997
42998
42999
43000
43001
43002
43003
43004
43005
43006
.....
43156
43157
43158
43159
43160
43161
43162

43163
43164
43165
43166
43167
43168
43169
.....
43227
43228
43229
43230
43231
43232
43233

43234
43235
43236
43237
43238
43239
43240
.....
43368
43369
43370
43371
43372
43373
43374

43375
43376
43377
43378
43379
43380
43381
.....
43391
43392
43393
43394
43395
43396
43397

43398
43399
43400
43401
43402
43403
43404
.....
43439
43440
43441
43442
43443
43444
43445
43446
43447
43448
43449
43450
43451
43452
43453
43454
43455
43456
43457
43458
43459
43460
.....
43461
43462
43463
43464
43465
43466
43467

43468
43469
43470
43471
43472
43473
43474
.....
43644
43645
43646
43647
43648
43649
43650
43651
43652
43653
43654
43655
43656
43657
43658
.....
43771
43772
43773
43774
43775
43776
43777
43778
43779
43780
43781
43782
43783
43784
43785
.....
43934
43935
43936
43937
43938
43939
43940

43941
43942
43943
43944
43945
43946
43947
.....
44843
44844
44845
44846
44847
44848
44849
44850
44851
44852
44853
44854
44855
44856
44857
.....
45035
45036
45037
45038
45039
45040
45041
45042
45043
45044
45045
45046
45047
45048
45049
.....
45096
45097
45098
45099
45100
45101
45102
45103
45104
45105
45106
45107
45108
45109
45110
45111
45112
45113
45114
45115
45116
45117
45118
45119
45120
45121
.....
45174
45175
45176
45177
45178
45179
45180
45181
45182
45183
45184
45185
45186
45187
45188
.....
45203
45204
45205
45206
45207
45208
45209
45210
45211
45212
45213
45214
45215
45216
45217
.....
45234
45235
45236
45237
45238
45239
45240
45241
45242
45243
45244
45245
45246
45247
45248
45249
45250
45251
45252
45253
45254
45255
45256
45257
45258
45259
45260
45261
45262
45263
45264
45265
45266
45267
45268
45269
45270
45271
45272
45273
45274
45275
45276
.....
45803
45804
45805
45806
45807
45808
45809

45810
45811
45812
45813
45814
45815
45816
45817
45818
45819
45820
45821
45822
45823
45824
.....
45902
45903
45904
45905
45906
45907
45908
45909
45910
45911
45912
45913
45914
45915
45916
.....
46616
46617
46618
46619
46620
46621
46622
46623
46624
46625
46626
46627
46628
46629
46630
46631
46632
.....
46909
46910
46911
46912
46913
46914
46915
46916
46917
46918
46919
46920
46921
46922
46923
.....
46983
46984
46985
46986
46987
46988
46989
46990
46991
46992
46993
46994
46995
46996
46997
46998
46999
.....
47496
47497
47498
47499
47500
47501
47502
47503
47504
47505
47506
47507
47508
47509
47510
47511
47512
47513
47514
47515
47516
47517
47518
47519
47520
47521
47522
47523
47524
47525
47526
47527
47528
47529
47530
47531
47532
47533
47534
47535
47536
.....
47572
47573
47574
47575
47576
47577
47578
47579
47580
47581
47582
47583
47584
47585
47586
.....
47826
47827
47828
47829
47830
47831
47832
47833
47834
47835
47836
47837
47838
47839
47840
.....
47888
47889
47890
47891
47892
47893
47894
47895
47896
47897
47898
47899
47900
47901
47902
47903
.....
48233
48234
48235
48236
48237
48238
48239
48240
48241
48242
48243
48244
48245
48246
48247
48248
48249
48250
48251
48252

48253
48254
48255
48256
48257
48258
48259
48260
48261
48262
48263
48264
48265
48266
48267
48268
48269
48270
48271
48272
48273
48274
48275
48276
48277
48278
48279
48280
.....
48381
48382
48383
48384
48385
48386
48387
48388
48389
48390
48391
48392
48393
48394
48395
48396
48397
48398
48399
48400
48401
48402
48403
48404
48405
48406
.....
48594
48595
48596
48597
48598
48599
48600
48601
48602
48603
48604
48605
48606
48607
48608
.....
48979
48980
48981
48982
48983
48984
48985
48986
48987
48988
48989
48990
48991
48992
48993
48994
48995
48996
.....
49026
49027
49028
49029
49030
49031
49032
49033
49034
49035
49036
49037
49038
49039
49040
.....
49142
49143
49144
49145
49146
49147
49148
49149
49150
49151
49152
49153
49154
49155
49156
.....
49201
49202
49203
49204
49205
49206
49207
49208
49209
49210
49211
49212
49213
49214
49215
.....
49347
49348
49349
49350
49351
49352
49353
49354
49355
49356
49357
49358
49359
49360
49361
.....
49487
49488
49489
49490
49491
49492
49493
49494
49495

49496
49497
49498
49499
49500
49501
49502

49503
49504
49505
49506
49507
49508
49509
49510

49511
49512
49513
49514
49515
49516
49517
.....
49735
49736
49737
49738
49739
49740
49741
49742
49743
49744
49745
49746
49747
49748
49749
49750
49751

49752
49753
49754
49755
49756

49757
49758
49759
49760
49761
49762
49763
49764
49765
49766
49767
49768
49769
49770
49771
49772
49773
49774
49775
.....
49791
49792
49793
49794
49795
49796
49797


49798
49799
49800
49801
49802
49803
49804
49805
49806
49807
49808
49809
49810
49811
49812

49813
49814
49815
49816
49817
49818
49819
.....
49850
49851
49852
49853
49854
49855
49856


49857
49858
49859
49860
49861


49862





49863
49864
49865
49866
49867
49868

49869
49870
49871
49872
49873
49874
49875
49876
49877
49878
49879
49880
49881
49882
49883
49884
49885
49886
49887
49888
49889
49890
49891
49892
49893
49894
49895
49896
49897
.....
49973
49974
49975
49976
49977
49978
49979
49980
49981
49982
49983
49984
49985
49986
49987
.....
50356
50357
50358
50359
50360
50361
50362
50363
50364
50365
50366
50367
50368
50369
50370
50371
.....
50583
50584
50585
50586
50587
50588
50589
50590
50591
50592
50593
50594
50595
50596
50597
50598
50599
50600
50601
50602
50603
.....
52388
52389
52390
52391
52392
52393
52394
52395
52396
52397
52398
52399
52400
52401
52402
52403
52404
52405
52406
.....
52483
52484
52485
52486
52487
52488
52489
52490
52491
52492
52493
52494
52495
52496
52497
.....
53357
53358
53359
53360
53361
53362
53363
53364
53365
53366
53367
53368
53369
53370
53371
53372
53373
53374
53375
53376
53377
53378
53379
53380
53381
53382
53383
53384
53385
53386
53387
53388
53389
53390
53391
53392
53393
53394

53395
53396



53397







53398













53399
53400
53401
53402
53403




53404
53405



53406
53407
53408
53409
53410

53411
53412
53413
53414






53415
53416
53417
53418
53419
53420








53421
53422
53423
53424
53425
53426

53427
53428
53429
53430
53431
53432
53433
53434
53435
53436

53437
53438
53439







53440
53441
53442
53443
53444
53445
53446
.....
53463
53464
53465
53466
53467
53468
53469
53470
53471
53472
53473
53474
53475
53476
53477
53478
53479
53480
53481
53482
53483
53484
53485
53486
53487
53488
53489
53490
53491
53492
53493
53494
53495
.....
53724
53725
53726
53727
53728
53729
53730
53731
53732
53733
53734
53735
53736
53737
53738
53739
53740
53741
53742
53743
53744
53745
53746
53747
53748
.....
53898
53899
53900
53901
53902
53903
53904
53905
53906
53907
53908
53909
53910
53911
53912
53913
53914
53915
53916
53917
53918
53919
53920
53921
53922
53923
53924
53925
53926
53927
53928
53929
53930
53931
53932
53933
53934
53935
53936
53937
53938
53939
53940
53941
53942
53943





53944
53945
53946
53947
53948
53949
53950
53951
53952
53953
53954
53955
.....
54105
54106
54107
54108
54109
54110
54111
54112
54113
54114
54115
54116
54117
54118
54119
.....
54130
54131
54132
54133
54134
54135
54136
54137
54138
54139
54140
54141
54142
54143
54144
54145
54146
.....
54183
54184
54185
54186
54187
54188
54189
54190
54191
54192
54193
54194
54195
54196
54197
54198
54199
54200
54201
54202
54203
54204
.....
54630
54631
54632
54633
54634
54635
54636
54637
54638
54639
54640
54641
54642
54643
54644
54645
54646
54647
54648
54649
54650
54651
54652
54653
54654
54655
54656
54657
54658
54659
54660
54661
54662
54663
54664
54665
54666
54667
54668
54669
54670
54671
54672
54673
54674
54675
54676
54677
54678
54679
54680
54681
54682
54683
54684
54685
54686
54687
54688
54689
54690
54691
54692
54693
54694
54695
.....
55113
55114
55115
55116
55117
55118
55119































55120
55121
55122
55123
55124
55125
55126
.....
56082
56083
56084
56085
56086
56087
56088
56089
56090
56091
56092
56093
56094
56095
56096
56097
56098
56099
56100
56101
56102
56103
56104
56105
56106
56107
56108
56109
56110
56111
56112
.....
56135
56136
56137
56138
56139
56140
56141
56142
56143
56144
56145
56146
56147
56148
56149
56150
56151
56152
56153
56154
56155
56156
56157
56158
56159
56160
56161
56162
56163
56164
56165
56166
56167
56168
56169
56170
.....
56196
56197
56198
56199
56200
56201
56202
56203
56204
56205
56206
56207
56208
56209
56210
.....
56259
56260
56261
56262
56263
56264
56265
56266
56267
56268
56269
56270
56271
56272
56273
56274
56275

56276
56277
56278
56279
56280
56281
56282
56283
.....
56304
56305
56306
56307
56308
56309
56310
56311
56312
56313
56314
56315
56316
56317
56318
.....
56341
56342
56343
56344
56345
56346
56347
56348
56349
56350
56351
56352
56353
56354
56355
.....
56367
56368
56369
56370
56371
56372
56373
56374
56375
56376
56377
56378
56379
56380
56381
56382
56383
56384
56385
56386
.....
56482
56483
56484
56485
56486
56487
56488
56489
56490
56491
56492
56493
56494
56495
56496
.....
56713
56714
56715
56716
56717
56718
56719
56720
56721
56722
56723
56724
56725
56726
56727
56728
56729
56730
56731
.....
56788
56789
56790
56791
56792
56793
56794
56795
56796
56797
56798
56799
56800
56801
56802
.....
57656
57657
57658
57659
57660
57661
57662
57663
57664
57665
57666
57667
57668
57669
57670
.....
58050
58051
58052
58053
58054
58055
58056







58057
58058
58059
58060
58061
58062
58063
58064
58065
58066


58067
58068
58069
58070
58071
58072
58073
58074
58075
.....
58269
58270
58271
58272
58273
58274
58275
58276
58277
58278
58279
58280
58281
58282
58283
58284
58285
58286
58287
58288
58289
58290
58291
58292
58293
58294
.....
58298
58299
58300
58301
58302
58303
58304












58305
58306
58307
58308
58309
58310
58311
58312
58313
58314
58315
58316
58317
58318
58319
.....
58322
58323
58324
58325
58326
58327
58328
58329
58330
58331
58332
58333
58334
58335
58336
58337
.....
58339
58340
58341
58342
58343
58344
58345
58346
58347
58348
58349
58350
58351
58352
58353
58354
.....
58367
58368
58369
58370
58371
58372
58373
58374
58375
58376
58377
58378
58379
58380
58381
.....
58385
58386
58387
58388
58389
58390
58391

58392
58393
58394
58395
58396
58397
58398
58399
.....
58417
58418
58419
58420
58421
58422
58423
58424
58425
58426
58427
58428
58429
58430
58431
58432
58433
58434
58435
.....
58436
58437
58438
58439
58440
58441
58442

58443

58444
58445
58446
58447
58448
58449
58450
58451
58452
58453
58454
58455
58456
58457
58458
58459
58460
58461
58462
58463
58464
58465
58466
58467
58468
58469
58470
58471
58472
58473
58474
58475
58476
58477
58478
58479
58480
58481
58482
58483
.....
58973
58974
58975
58976
58977
58978
58979
58980

58981
58982
58983
58984
58985
58986
58987
58988
58989
58990
58991
58992
58993
58994
58995
58996
58997
58998
58999


59000
59001
59002
59003
59004
59005
59006
59007
59008
59009
59010
59011
59012
59013
59014

59015
59016
59017
59018
59019
59020

59021
59022
59023
59024
59025
59026
59027
59028

59029
59030
59031
59032
59033
59034
59035
.....
59091
59092
59093
59094
59095
59096
59097
59098
59099
59100
59101
59102
59103
59104
59105
.....
59198
59199
59200
59201
59202
59203
59204

59205



59206
59207
59208
59209
59210
59211
59212
.....
59223
59224
59225
59226
59227
59228
59229
59230
59231
59232
59233
59234
59235
59236
59237
.....
59252
59253
59254
59255
59256
59257
59258
59259
59260
59261
59262
59263
59264
59265
59266
.....
59330
59331
59332
59333
59334
59335
59336
59337
59338
59339
59340
59341
59342
59343
59344
59345
59346
59347
59348
59349
59350
59351
59352
59353
59354
59355
59356
59357
59358
59359
59360
59361
59362
59363
59364
59365
59366
59367
59368
59369
59370
59371
59372
59373
59374
59375
59376
59377
59378
59379
59380
59381
59382
59383
59384
59385
59386
59387
59388
59389
59390
59391
59392
59393
59394
59395
59396
59397
59398
59399
59400
59401
59402
59403
59404
59405
59406
59407
59408
59409
59410
59411
59412
59413
59414
59415
59416
59417
59418
59419
59420
59421
59422
59423
59424
59425
59426
59427
59428
59429
59430
59431
59432
59433
59434
59435
59436
59437
59438
59439
59440
59441
59442
59443
59444
59445
59446
59447
59448
59449
59450
59451
59452
59453
59454
59455
59456
59457
.....
59472
59473
59474
59475
59476
59477
59478
59479
59480
59481
59482
59483
59484
59485
59486
59487
59488
59489
59490
59491
59492

59493
59494
59495
59496
59497
59498
59499
59500
59501
59502
59503
59504
59505
59506











59507
59508
59509
59510
59511

59512
59513




59514





59515
59516
59517
59518
59519
59520
59521
59522
59523
59524
59525
59526
59527
59528
59529
59530
59531
59532
59533
59534
59535
59536
59537
59538
59539
59540
59541
59542
59543
59544
59545
59546
59547
59548
59549

59550
59551
59552
59553
59554
59555
59556
59557
59558
59559
59560
.....
59569
59570
59571
59572
59573
59574
59575
59576
59577
59578
59579
59580
59581
59582
59583



















59584
59585
59586
59587
59588
59589
59590
.....
59614
59615
59616
59617
59618
59619
59620
59621
59622
59623
59624
59625
59626
59627
59628
.....
59629
59630
59631
59632
59633
59634
59635
59636
59637
59638
59639
59640
59641
59642
59643
59644
59645
59646
59647
59648
59649
59650
59651
59652
59653
59654
.....
59710
59711
59712
59713
59714
59715
59716

59717
59718
59719
59720
59721
59722
59723
59724
.....
59916
59917
59918
59919
59920
59921
59922
59923
59924


59925

59926
59927
59928

59929
59930
59931
59932
59933
59934
59935
59936
59937
59938
59939
59940
59941
59942
59943
59944
59945
59946

59947
59948
59949
59950
59951
59952
59953
59954
59955
59956
59957
.....
59958
59959
59960
59961
59962
59963
59964
59965
59966
59967
59968
59969
59970
59971
59972
59973
59974
59975
59976
59977
59978
59979
59980
59981
59982
59983
59984
59985
59986
59987
59988
59989
59990
59991
59992
59993
59994
59995
59996
.....
60019
60020
60021
60022
60023
60024
60025
60026
60027

60028
60029
60030
60031
60032
60033
60034
.....
60081
60082
60083
60084
60085
60086
60087
60088
60089
60090
60091
60092
60093
60094
60095
.....
60158
60159
60160
60161
60162
60163
60164
60165
60166
60167
60168
60169
60170
60171
60172
.....
60177
60178
60179
60180
60181
60182
60183

60184
60185
60186
60187
60188
60189
60190
60191
60192
60193
60194
60195
60196
60197
60198
60199
60200
60201
60202
60203
60204
60205
60206
60207
60208
60209
60210
60211


60212
60213
60214
60215
60216
60217
60218
60219
60220
60221
60222
60223
60224

60225
60226
60227
60228
60229
60230
60231
.....
60478
60479
60480
60481
60482
60483
60484
60485
60486

60487


60488
60489
60490
60491
60492
60493

60494

60495


60496
60497
60498
60499
60500
60501
60502
.....
60632
60633
60634
60635
60636
60637
60638

60639

60640


60641
60642
60643
60644
60645
60646
60647

60648


60649
60650
60651
60652
60653
60654
60655
60656
60657
.....
60979
60980
60981
60982
60983
60984
60985
60986
60987
60988
60989
60990
60991
60992
60993
60994
60995
60996
60997
60998
60999
61000
61001
61002
61003
61004

61005
61006
61007
61008
61009
61010
61011
61012
61013
61014
61015
61016
61017
61018
61019
.....
61049
61050
61051
61052
61053
61054
61055
61056
61057
61058
61059
61060
61061
61062
61063
.....
61261
61262
61263
61264
61265
61266
61267
61268
61269
61270
61271
61272
61273
61274
61275
.....
61315
61316
61317
61318
61319
61320
61321
61322
61323
61324
61325
61326
61327
61328
61329
.....
61548
61549
61550
61551
61552
61553
61554
61555
61556
61557
61558
61559
61560
61561
61562
.....
61679
61680
61681
61682
61683
61684
61685
61686
61687
61688
61689
61690
61691
61692
61693
.....
61767
61768
61769
61770
61771
61772
61773
61774
61775
61776
61777
61778
61779
61780
61781
.....
61967
61968
61969
61970
61971
61972
61973
61974
61975
61976
61977
61978
61979
61980
61981
61982
61983
61984
61985
61986
61987
61988
.....
62113
62114
62115
62116
62117
62118
62119
62120
62121
62122
62123
62124
62125
62126
62127
.....
62175
62176
62177
62178
62179
62180
62181

62182
62183
62184
62185
62186
62187
62188
.....
62190
62191
62192
62193
62194
62195
62196

62197
62198
62199
62200
62201
62202

62203
62204
62205
62206
62207
62208
62209
62210
62211
62212
62213
62214
62215
62216
62217
.....
62220
62221
62222
62223
62224
62225
62226
62227
62228
62229
62230
62231
62232
62233
62234
62235
62236
62237
62238
62239
62240
62241
62242
62243
62244
62245
62246
62247
62248
62249
62250
62251
62252
62253
62254
62255
62256
.....
62305
62306
62307
62308
62309
62310
62311
62312
62313

62314
62315
62316
62317
62318
62319
62320
62321
62322
62323
62324
62325
62326



62327
62328
62329
62330
62331
62332
62333
.....
62511
62512
62513
62514
62515
62516
62517
62518
62519
62520
62521
62522
62523
62524
62525
.....
62543
62544
62545
62546
62547
62548
62549
62550
62551
62552
62553
62554
62555
62556
62557
.....
62588
62589
62590
62591
62592
62593
62594
62595
62596
62597
62598
62599
62600
62601
62602
.....
62656
62657
62658
62659
62660
62661
62662
62663
62664
62665
62666
62667
62668
62669
62670
.....
62727
62728
62729
62730
62731
62732
62733
62734
62735


62736
62737
62738
62739
62740
62741
62742
.....
62757
62758
62759
62760
62761
62762
62763
62764
62765
62766
62767
62768
62769
62770
62771
62772
62773
62774
62775
62776
62777
62778
62779
62780
62781
62782
62783
62784
62785

62786
62787
62788
62789
62790
62791
62792
62793
62794
.....
62805
62806
62807
62808
62809
62810
62811
62812
62813
62814
62815
62816
62817
62818
62819
.....
62841
62842
62843
62844
62845
62846
62847
62848
62849
62850
62851
62852
62853
62854
62855
.....
62856
62857
62858
62859
62860
62861
62862
62863
62864

62865
62866

62867
62868
62869
62870
62871
62872
62873
.....
62901
62902
62903
62904
62905
62906
62907
62908
62909
62910
62911
62912
62913
62914
62915
.....
63036
63037
63038
63039
63040
63041
63042
63043
63044
63045
63046
63047
63048
63049
63050
63051
63052
.....
63068
63069
63070
63071
63072
63073
63074
63075
63076
63077
63078
63079
63080
63081
63082
.....
63139
63140
63141
63142
63143
63144
63145
63146
63147
63148
63149
63150
63151
63152
63153
.....
63201
63202
63203
63204
63205
63206
63207
63208
63209
63210
63211
63212
63213
63214
63215
.....
63237
63238
63239
63240
63241
63242
63243
63244
63245
63246
63247
63248
63249
63250
63251
.....
63253
63254
63255
63256
63257
63258
63259
63260
63261
63262
63263
63264
63265
63266
63267
63268
.....
63367
63368
63369
63370
63371
63372
63373
63374

63375
63376
63377
63378
63379
63380
63381
.....
63395
63396
63397
63398
63399
63400
63401
63402


63403
63404


63405
63406
63407
63408
63409
63410
63411
.....
63421
63422
63423
63424
63425
63426
63427

63428
63429
63430
63431
63432
63433
63434
63435















63436

63437
63438
63439
63440
63441
63442
63443
63444
63445
63446
63447
63448
63449
63450
63451
63452
63453
63454
63455
63456
63457
63458
63459
63460
63461
63462
63463
63464
.....
63973
63974
63975
63976
63977
63978
63979
63980


63981
63982
63983
63984
63985
63986
63987
.....
64139
64140
64141
64142
64143
64144
64145
64146
64147
64148
64149
64150
64151
64152
64153
.....
64544
64545
64546
64547
64548
64549
64550

64551
64552
64553
64554
64555
64556
64557
64558











64559
64560
64561
64562
64563
64564
64565
.....
65058
65059
65060
65061
65062
65063
65064
65065


65066
65067
65068
65069
65070
65071
65072
.....
65099
65100
65101
65102
65103
65104
65105
65106
65107
65108
65109
65110
65111
65112
65113
65114
65115
65116
65117
65118


65119
65120
65121
65122
65123

65124
65125
65126
65127
65128
65129
65130
.....
65233
65234
65235
65236
65237
65238
65239

65240
65241
65242
65243

65244
65245
65246
65247
65248
65249
65250
65251
65252
65253

65254
65255


65256
65257
65258
65259
65260
65261
65262
65263
65264
65265
.....
65590
65591
65592
65593
65594
65595
65596
65597
65598
65599
65600
65601
65602
65603
65604
.....
66547
66548
66549
66550
66551
66552
66553
66554
66555
66556
66557
66558
66559
66560
66561
66562
66563
66564
66565
66566
66567
66568
66569
66570
66571
66572
.....
66691
66692
66693
66694
66695
66696
66697
66698
66699
66700
66701
66702
66703
66704
66705
.....
66946
66947
66948
66949
66950
66951
66952
66953

66954
66955
66956
66957
66958
66959
66960
66961
66962
66963
66964
66965
66966
.....
66977
66978
66979
66980
66981
66982
66983
66984
66985
66986

66987
66988
66989
66990
66991
66992
66993
.....
67001
67002
67003
67004
67005
67006
67007
67008
67009
67010
67011
67012
67013
67014
67015
.....
67050
67051
67052
67053
67054
67055
67056




















67057
67058
67059
67060
67061
67062
67063
.....
67075
67076
67077
67078
67079
67080
67081
67082
67083
67084
67085
67086
67087
67088
67089
.....
67346
67347
67348
67349
67350
67351
67352
67353

67354

67355
67356
67357
67358
67359
67360
67361
67362
67363
67364
67365
67366
67367
67368
67369
67370
67371
67372

67373
67374
67375
67376
67377
67378
67379
67380
67381
67382
.....
67619
67620
67621
67622
67623
67624
67625
67626
67627
67628
67629
67630
67631
67632
67633
.....
67865
67866
67867
67868
67869
67870
67871
67872
67873
67874
67875
67876
67877
67878
67879
67880
67881
67882
67883
67884
67885
67886
67887
67888
67889
67890
67891
67892
67893
67894
.....
67961
67962
67963
67964
67965
67966
67967
67968
67969
67970
67971
67972
67973
67974
67975
67976
67977
67978
67979
67980
67981
67982
67983
67984
67985
.....
68058
68059
68060
68061
68062
68063
68064
68065
68066
68067
68068
68069
68070
68071
68072
.....
68115
68116
68117
68118
68119
68120
68121
68122
68123
68124
68125
68126
68127
68128
68129
68130
68131
68132
68133
68134
68135
68136
68137
68138
68139
68140
68141
68142
68143
68144
68145
68146
68147
68148
68149
68150
68151
68152
68153
68154
68155
68156
68157
68158
68159
68160
68161
68162
68163
68164
68165
68166
68167
68168
68169
68170
68171
68172
68173
68174
68175
68176
68177
68178
68179
68180
68181
68182
68183
68184
68185
68186
68187
68188
68189
68190
68191
68192
68193
68194
68195
68196
68197
68198
68199
68200
68201
68202
68203
68204
68205
68206
68207
68208
.....
68237
68238
68239
68240
68241
68242
68243
68244
68245
68246
68247
68248
68249
68250
68251
68252
68253
68254
68255
68256
68257
68258
68259
68260
68261
68262
68263
.....
68266
68267
68268
68269
68270
68271
68272
68273
68274
68275
68276
68277
68278
68279
68280
.....
68425
68426
68427
68428
68429
68430
68431
68432
68433
68434
68435
68436
68437
68438
68439
68440
68441
68442
68443
68444
68445
.....
68497
68498
68499
68500
68501
68502
68503
68504
68505
68506
68507
68508
68509
68510
68511
68512
68513
.....
68583
68584
68585
68586
68587
68588
68589
68590
68591
68592
68593
68594
68595
68596
68597
.....
68777
68778
68779
68780
68781
68782
68783
68784
68785
68786
68787
68788
68789
68790
68791
68792
68793
68794
68795
68796
68797
68798
68799
.....
68834
68835
68836
68837
68838
68839
68840
68841
68842
68843
68844
68845
68846
68847
68848
.....
68859
68860
68861
68862
68863
68864
68865
68866
68867
68868

68869
68870
68871
68872
68873
68874
68875
68876
68877
68878
68879
68880
68881
.....
68925
68926
68927
68928
68929
68930
68931
68932
68933
68934
68935
68936
68937
68938
68939
.....
68969
68970
68971
68972
68973
68974
68975
68976
68977
68978
68979
68980
68981
68982
68983
.....
69092
69093
69094
69095
69096
69097
69098
69099
69100
69101
69102
69103
69104
69105
69106
69107
69108
69109
69110
69111
69112
69113
69114
69115
69116
69117
69118
69119
69120
69121
69122
69123
69124
69125
69126
69127
.....
69514
69515
69516
69517
69518
69519
69520
69521
69522
69523
69524
69525
69526
69527
69528
.....
69636
69637
69638
69639
69640
69641
69642
69643
69644
69645
69646
69647
69648
69649
69650
69651
.....
69723
69724
69725
69726
69727
69728
69729
69730
69731
69732
69733
69734
69735
69736
69737
.....
69861
69862
69863
69864
69865
69866
69867
69868
69869
69870
69871
69872

69873
69874
69875
69876
69877
69878
69879
69880
69881
69882
.....
69942
69943
69944
69945
69946
69947
69948
69949
69950
69951
69952
69953
69954
69955
69956
.....
70022
70023
70024
70025
70026
70027
70028
70029
70030





70031



70032
70033






70034
70035

70036
70037
70038
70039
70040
70041
70042
70043
.....
70179
70180
70181
70182
70183
70184
70185
70186
70187
70188

70189
70190
70191
70192
70193
70194
70195
70196
70197
70198
70199
70200
70201
70202
70203
70204
70205
.....
70235
70236
70237
70238
70239
70240
70241
70242
70243
70244
70245
70246
70247
70248
70249
70250
.....
70333
70334
70335
70336
70337
70338
70339

70340
70341
70342
70343
70344
70345
70346
70347
70348
70349
70350
70351
70352
70353
70354
70355
70356
70357
70358

70359
70360
70361
70362
70363
70364
70365
70366
70367
70368
70369
70370
70371
70372
70373
70374
70375
70376
70377
70378
70379
70380
70381
70382
70383
70384
70385
70386
70387
70388
70389
70390
70391





70392
70393
70394
70395
70396
70397
70398
70399
70400
70401
70402
70403
70404
70405

70406
70407
70408
70409
70410
70411
70412
70413
70414
70415
70416
70417
70418
70419
.....
70425
70426
70427
70428
70429
70430
70431
70432
70433
70434
70435
70436
70437
70438
70439
70440
.....
70443
70444
70445
70446
70447
70448
70449
70450
70451
70452
70453
70454
70455
70456
70457
70458
70459
.....
70466
70467
70468
70469
70470
70471
70472
70473
70474
70475
70476
70477
70478
70479
70480
70481
70482
.....
70506
70507
70508
70509
70510
70511
70512
70513
70514
70515
70516
70517
70518
70519
70520
.....
70566
70567
70568
70569
70570
70571
70572
70573
70574
70575
70576
70577
70578
70579
70580
.....
70797
70798
70799
70800
70801
70802
70803
70804
70805
70806
70807
70808
70809
70810
70811
.....
70856
70857
70858
70859
70860
70861
70862
70863
70864
70865
70866
70867
70868
70869
70870
.....
70877
70878
70879
70880
70881
70882
70883
70884
70885
70886
70887

70888

70889
70890
70891
70892
70893
70894
70895
70896
.....
70904
70905
70906
70907
70908
70909
70910
70911
70912
70913
70914
70915
70916
70917
70918
70919
70920
70921

70922
70923
70924
70925

70926
70927
70928
70929
70930
70931
70932
70933
70934
70935
70936
70937
70938
70939
70940
.....
70968
70969
70970
70971
70972
70973
70974
70975
70976
70977
70978
70979
70980
70981
70982
.....
71985
71986
71987
71988
71989
71990
71991
71992
71993
71994
71995
71996
71997
71998
71999
.....
72117
72118
72119
72120
72121
72122
72123
72124
72125
72126
72127
72128
72129
72130
72131
72132
72133

72134
72135
72136
72137
72138
72139
72140
.....
72344
72345
72346
72347
72348
72349
72350
72351
72352
72353
72354
72355
72356
72357
72358
.....
72506
72507
72508
72509
72510
72511
72512
72513
72514

72515


72516
72517
72518
72519
72520
72521
72522
72523
72524
.....
73051
73052
73053
73054
73055
73056
73057

73058
73059
73060
73061
73062
73063
73064
.....
73123
73124
73125
73126
73127
73128
73129

73130
73131
73132
73133
73134
73135
73136
.....
73419
73420
73421
73422
73423
73424
73425
73426
73427
73428
73429
73430
73431
73432
73433
.....
73532
73533
73534
73535
73536
73537
73538
73539
73540
73541
73542
73543
73544
73545
73546
.....
73622
73623
73624
73625
73626
73627
73628
73629
73630
73631
73632
73633
73634
73635
73636
73637
.....
73645
73646
73647
73648
73649
73650
73651


73652
73653
73654
73655
73656
73657



73658
73659
73660
73661
73662
73663
73664
.....
73930
73931
73932
73933
73934
73935
73936


73937


73938
73939
73940
73941
73942
73943
73944
73945
.....
74070
74071
74072
74073
74074
74075
74076
74077
74078
74079
74080
74081
74082
74083
74084
74085
.....
74174
74175
74176
74177
74178
74179
74180
74181
74182
74183
74184
74185
74186
74187
74188
74189
.....
74251
74252
74253
74254
74255
74256
74257
74258
74259
74260
74261
74262
74263
74264
74265
.....
74431
74432
74433
74434
74435
74436
74437


































74438

74439
74440
74441
74442
74443
74444
74445
.....
74624
74625
74626
74627
74628
74629
74630
74631
74632
74633
74634
74635
74636
74637
74638
.....
74777
74778
74779
74780
74781
74782
74783
74784
74785
74786
74787
74788
74789
74790
74791
.....
75395
75396
75397
75398
75399
75400
75401

75402
75403
75404
75405
75406
75407
75408
.....
75550
75551
75552
75553
75554
75555
75556
75557
75558
75559
75560
75561
75562
75563
75564
.....
75599
75600
75601
75602
75603
75604
75605
75606
75607
75608
75609
75610
75611
75612
75613
75614
.....
76307
76308
76309
76310
76311
76312
76313
76314
76315
76316
76317
76318
76319
76320
76321
.....
76760
76761
76762
76763
76764
76765
76766
76767
76768
76769
76770
76771
76772
76773
76774
76775
76776
76777
76778
76779
.....
76877
76878
76879
76880
76881
76882
76883
76884
76885
76886
76887
76888
76889
76890
76891
76892
76893
.....
77430
77431
77432
77433
77434
77435
77436
77437
77438
77439
77440
77441
77442
77443
77444
77445
77446
77447
77448
77449
.....
77661
77662
77663
77664
77665
77666
77667
77668
77669
77670
77671
77672
77673
77674
77675
.....
77701
77702
77703
77704
77705
77706
77707
77708
77709
77710
77711
77712
77713
77714
77715
77716
77717
77718
77719
77720
77721
77722
.....
77973
77974
77975
77976
77977
77978
77979
77980
77981
77982
77983
77984
77985
77986
77987
.....
78095
78096
78097
78098
78099
78100
78101
78102
78103
78104
78105
78106
78107
78108
78109
.....
78126
78127
78128
78129
78130
78131
78132
78133
78134
78135
78136
78137
78138
78139
78140
.....
78153
78154
78155
78156
78157
78158
78159
78160
78161
78162
78163
78164
78165
78166
78167
78168
78169
78170
78171
78172
78173
78174
78175
78176
.....
78353
78354
78355
78356
78357
78358
78359
78360
78361
78362
78363
78364
78365
78366
78367
.....
78528
78529
78530
78531
78532
78533
78534
78535
78536
78537
78538
78539
78540
78541
78542
78543
78544
78545
78546
78547
78548
78549
78550
78551

78552
78553
78554
78555
78556
78557
78558
78559
78560
78561
78562
78563
78564
78565
78566
78567
78568
78569
78570
78571
78572
78573
78574
78575
78576
78577
78578
78579
78580
78581
78582
.....
78642
78643
78644
78645
78646
78647
78648

78649
78650
78651
78652
78653
78654
78655
.....
78675
78676
78677
78678
78679
78680
78681
78682
78683
78684
78685
78686
78687

78688
78689
78690
78691
78692
78693
78694
.....
78721
78722
78723
78724
78725
78726
78727
78728
78729
78730
78731
78732
78733
78734
78735
.....
78995
78996
78997
78998
78999
79000
79001
79002
79003
79004
79005
79006
79007
79008
79009
.....
79222
79223
79224
79225
79226
79227
79228
79229
79230
79231
79232
79233
79234
79235
79236
.....
79399
79400
79401
79402
79403
79404
79405
79406
79407
79408
79409
79410
79411
79412
79413
.....
79598
79599
79600
79601
79602
79603
79604
79605
79606
79607
79608
79609
79610
79611
79612
.....
79640
79641
79642
79643
79644
79645
79646
79647
79648
79649
79650
79651
79652
79653
79654
79655
.....
79931
79932
79933
79934
79935
79936
79937
79938

79939
79940
79941
79942
79943
79944
79945
79946
79947
79948
79949
79950
79951
.....
79954
79955
79956
79957
79958
79959
79960
79961
79962
79963
79964
79965
79966
79967
79968
.....
80033
80034
80035
80036
80037
80038
80039
80040
80041
80042
80043
80044
80045
80046
80047
.....
80059
80060
80061
80062
80063
80064
80065
80066
80067
80068
80069
80070
80071
80072
80073
.....
80097
80098
80099
80100
80101
80102
80103
80104
80105
80106
80107
80108
80109
80110
80111
.....
80114
80115
80116
80117
80118
80119
80120
80121
80122
80123
80124
80125
80126
80127
80128
.....
80287
80288
80289
80290
80291
80292
80293
80294
80295
80296
80297
80298
80299
80300
80301
80302
80303
80304
80305
80306
80307
80308
80309
80310
80311
80312
80313
80314
80315
80316
80317
80318
.....
80413
80414
80415
80416
80417
80418
80419
80420
80421
80422
80423
80424
80425
80426
80427
80428
80429
.....
80503
80504
80505
80506
80507
80508
80509
80510
80511
80512
80513
80514
80515
80516
80517
.....
80525
80526
80527
80528
80529
80530
80531
80532
80533
80534
80535
80536
80537
80538
80539
80540
80541
80542
80543
80544
80545
80546
80547
80548
80549
80550

80551
80552
80553
80554
80555
80556
80557
.....
80587
80588
80589
80590
80591
80592
80593
80594
80595
80596
80597
80598
80599
80600
80601
80602
80603
80604
80605
80606
80607
80608
80609
.....
80677
80678
80679
80680
80681
80682
80683
80684
80685
80686
80687
80688
80689
80690
80691
.....
80883
80884
80885
80886
80887
80888
80889
80890
80891
80892
80893
80894
80895
80896
80897
.....
81446
81447
81448
81449
81450
81451
81452
81453
81454
81455
81456
81457
81458
81459
81460
81461
81462
81463
81464
81465
81466
81467
81468
81469
.....
81472
81473
81474
81475
81476
81477
81478
81479
81480


81481
81482
81483
81484
81485
81486
81487
.....
81655
81656
81657
81658
81659
81660
81661
81662
81663
81664
81665
81666
81667
81668
81669
81670
81671
81672
81673
81674
.....
81803
81804
81805
81806
81807
81808
81809
81810
81811
81812
81813
81814
81815
81816
81817
81818
81819
81820
81821
81822
81823
81824
81825
81826
81827
.....
82055
82056
82057
82058
82059
82060
82061
82062
82063
82064
82065
82066
82067
82068
82069
.....
82086
82087
82088
82089
82090
82091
82092

82093
82094
82095
82096
82097
82098
82099
82100
82101
82102
82103
82104
82105
82106
.....
82593
82594
82595
82596
82597
82598
82599

82600
82601
82602
82603
82604
82605
82606
.....
82905
82906
82907
82908
82909
82910
82911
82912
82913
82914
82915
82916
82917
82918
82919
82920
82921
82922
82923
82924
82925
82926
82927
82928
82929
82930
82931
82932
82933
82934
82935
82936
82937
82938
82939
82940
82941
82942
82943
82944
82945
82946
82947
82948
82949
82950
82951
82952
82953
82954
82955
82956
82957
82958
82959
82960
82961
82962
82963
82964
82965
82966
82967
82968
82969
82970
82971
82972
82973
82974
82975
82976
82977
82978
82979
82980
82981
82982
82983
82984
82985
82986
82987
82988
82989
82990
82991
82992
82993
82994
82995
82996
82997
82998
82999
83000
83001
83002
83003
83004
83005
83006
83007
83008
83009
83010
83011
83012
83013
83014
83015
83016
83017
83018
83019
83020
83021
83022
83023
83024
83025
83026
83027
83028
83029
83030
83031
83032
83033
83034
83035
83036
83037
83038
83039
83040
83041
83042
83043
83044
83045
83046
83047
83048
83049
83050
83051
83052
83053
83054
83055
83056
83057
83058
83059
83060
83061
83062
83063
83064
83065
83066
83067
83068
83069
83070
83071
83072
83073
83074
83075
83076
83077
83078
83079
83080
83081
83082
83083
83084
83085
83086
83087
83088
83089
83090
83091
83092
83093
83094
83095
83096
83097
83098
83099
83100
83101
83102
83103
83104
83105
83106
83107
83108
83109
83110
83111
83112
83113
83114
83115
83116
83117
83118
83119
83120
83121
83122
83123
83124
83125
83126
83127
83128
83129
83130
83131
83132
83133
83134
83135
83136
83137
83138
83139
83140
83141
83142
83143
83144
83145
83146
83147
83148
83149
83150
83151
83152
83153
83154
83155
83156
83157
83158
83159
.....
83162
83163
83164
83165
83166
83167
83168
83169
83170
83171
83172
83173
83174
83175
83176
83177
83178

83179
83180

83181
83182
83183
83184

83185
83186
83187
83188
83189
83190
83191
83192
83193

83194
83195
83196




83197







83198





















83199


83200












































83201
83202
83203
83204
83205
83206
83207
.....
83208
83209
83210
83211
83212
83213
83214


83215





83216
83217
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.....
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/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.6.14.  By combining all the individual C code files into this 
** single large file, the entire code can be compiled as a one translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% are more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
** programs, you need this file and the "sqlite3.h" header file that defines
** the programming interface to the SQLite library.  (If you do not have 
** the "sqlite3.h" header file at hand, you will find a copy in the first
** 5533 lines past this header comment.)  Additional code files may be
** needed if you want a wrapper to interface SQLite with your choice of
** programming language.  The code for the "sqlite3" command-line shell
** is also in a separate file.  This file contains only code for the core
** SQLite library.
**
** This amalgamation was generated on 2009-05-06 16:30:49 UTC.
*/
#define SQLITE_CORE 1
#define SQLITE_AMALGAMATION 1
#ifndef SQLITE_PRIVATE
# define SQLITE_PRIVATE static
#endif
#ifndef SQLITE_API
................................................................................
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.868 2009/05/04 11:42:30 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
................................................................................
#if defined(SQLITE_SYSTEM_MALLOC)+defined(SQLITE_MEMDEBUG)+\
    defined(SQLITE_MEMORY_SIZE)+defined(SQLITE_MMAP_HEAP_SIZE)+\
    defined(SQLITE_POW2_MEMORY_SIZE)==0
# define SQLITE_SYSTEM_MALLOC 1
#endif

/*
** If SQLITE_MALLOC_SOFT_LIMIT is not zero, then try to keep the
** sizes of memory allocations below this value where possible.
*/
#if !defined(SQLITE_MALLOC_SOFT_LIMIT)
# define SQLITE_MALLOC_SOFT_LIMIT 1024
#endif

/*
** We need to define _XOPEN_SOURCE as follows in order to enable
** recursive mutexes on most Unix systems.  But Mac OS X is different.
** The _XOPEN_SOURCE define causes problems for Mac OS X we are told,
................................................................................
*/
#if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST)
# define TESTONLY(X)  X
#else
# define TESTONLY(X)
#endif

/*
** Sometimes we need a small amount of code such as a variable initialization
** to setup for a later assert() statement.  We do not want this code to
** appear when assert() is disabled.  The following macro is therefore
** used to contain that setup code.  The "VVA" acronym stands for
** "Verification, Validation, and Accreditation".  In other words, the
** code within VVA_ONLY() will only run during verification processes.
*/
#ifndef NDEBUG
# define VVA_ONLY(X)  X
#else
# define VVA_ONLY(X)
#endif

/*
** The ALWAYS and NEVER macros surround boolean expressions which 
** are intended to always be true or false, respectively.  Such
** expressions could be omitted from the code completely.  But they
** are included in a few cases in order to enhance the resilience
** of SQLite to unexpected behavior - to make the code "self-healing"
** or "ductile" rather than being "brittle" and crashing at the first
................................................................................
# define likely(X)    __builtin_expect((X),1)
# define unlikely(X)  __builtin_expect((X),0)
#else
# define likely(X)    !!(X)
# define unlikely(X)  !!(X)
#endif















/************** Include sqlite3.h in the middle of sqliteInt.h ***************/
/************** Begin file sqlite3.h *****************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
................................................................................
** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite.h.in,v 1.447 2009/04/30 15:59:56 drh Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.
................................................................................
** The Z value is the release number and is incremented with
** each release but resets back to 0 whenever Y is incremented.
**
** See also: [sqlite3_libversion()] and [sqlite3_libversion_number()].
**
** Requirements: [H10011] [H10014]
*/
#define SQLITE_VERSION         "3.6.14"
#define SQLITE_VERSION_NUMBER  3006014

/*
** CAPI3REF: Run-Time Library Version Numbers {H10020} <S60100>
** KEYWORDS: sqlite3_version
**
** These features provide the same information as the [SQLITE_VERSION]
** and [SQLITE_VERSION_NUMBER] #defines in the header, but are associated
................................................................................
#define SQLITE_IOERR_BLOCKED           (SQLITE_IOERR | (11<<8))
#define SQLITE_IOERR_NOMEM             (SQLITE_IOERR | (12<<8))
#define SQLITE_IOERR_ACCESS            (SQLITE_IOERR | (13<<8))
#define SQLITE_IOERR_CHECKRESERVEDLOCK (SQLITE_IOERR | (14<<8))
#define SQLITE_IOERR_LOCK              (SQLITE_IOERR | (15<<8))
#define SQLITE_IOERR_CLOSE             (SQLITE_IOERR | (16<<8))
#define SQLITE_IOERR_DIR_CLOSE         (SQLITE_IOERR | (17<<8))

#define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED | (1<<8) )

/*
** CAPI3REF: Flags For File Open Operations {H10230} <H11120> <H12700>
**
** These bit values are intended for use in the
** 3rd parameter to the [sqlite3_open_v2()] interface and
................................................................................
**
** When SQLite invokes the xSync() method of an
** [sqlite3_io_methods] object it uses a combination of
** these integer values as the second argument.
**
** When the SQLITE_SYNC_DATAONLY flag is used, it means that the
** sync operation only needs to flush data to mass storage.  Inode
** information need not be flushed. If the lower four bits of the flag
** equal SQLITE_SYNC_NORMAL, that means to use normal fsync() semantics.
** If the lower four bits equal SQLITE_SYNC_FULL, that means
** to use Mac OS X style fullsync instead of fsync().
*/
#define SQLITE_SYNC_NORMAL        0x00002
#define SQLITE_SYNC_FULL          0x00003
#define SQLITE_SYNC_DATAONLY      0x00010

/*
................................................................................
**
** A call to sqlite3_initialize() is an "effective" call if it is
** the first time sqlite3_initialize() is invoked during the lifetime of
** the process, or if it is the first time sqlite3_initialize() is invoked
** following a call to sqlite3_shutdown().  Only an effective call
** of sqlite3_initialize() does any initialization.  All other calls
** are harmless no-ops.
**
** A call to sqlite3_shutdown() is an "effective" call if it is the first
** call to sqlite3_shutdown() since the last sqlite3_initialize().  Only
** an effective call to sqlite3_shutdown() does any deinitialization.
** All other calls to sqlite3_shutdown() are harmless no-ops.
**
** Among other things, sqlite3_initialize() shall invoke
** sqlite3_os_init().  Similarly, sqlite3_shutdown()
** shall invoke sqlite3_os_end().
**
** The sqlite3_initialize() routine returns [SQLITE_OK] on success.
** If for some reason, sqlite3_initialize() is unable to initialize
................................................................................
** This function returns the number of database rows that were changed
** or inserted or deleted by the most recently completed SQL statement
** on the [database connection] specified by the first parameter.
** Only changes that are directly specified by the [INSERT], [UPDATE],
** or [DELETE] statement are counted.  Auxiliary changes caused by
** triggers are not counted. Use the [sqlite3_total_changes()] function
** to find the total number of changes including changes caused by triggers.
**
** Changes to a view that are simulated by an [INSTEAD OF trigger]
** are not counted.  Only real table changes are counted.
**
** A "row change" is a change to a single row of a single table
** caused by an INSERT, DELETE, or UPDATE statement.  Rows that
** are changed as side effects of [REPLACE] constraint resolution,
** rollback, ABORT processing, [DROP TABLE], or by any other
** mechanisms do not count as direct row changes.
**
** A "trigger context" is a scope of execution that begins and
** ends with the script of a [CREATE TRIGGER | trigger]. 
** Most SQL statements are
** evaluated outside of any trigger.  This is the "top level"
** trigger context.  If a trigger fires from the top level, a
** new trigger context is entered for the duration of that one
** trigger.  Subtriggers create subcontexts for their duration.
**
** Calling [sqlite3_exec()] or [sqlite3_step()] recursively does
** not create a new trigger context.
................................................................................
** that also occurred at the top level.  Within the body of a trigger,
** the sqlite3_changes() interface can be called to find the number of
** changes in the most recently completed INSERT, UPDATE, or DELETE
** statement within the body of the same trigger.
** However, the number returned does not include changes
** caused by subtriggers since those have their own context.
**




** See also the [sqlite3_total_changes()] interface and the





** [count_changes pragma].
**
** Requirements:
** [H12241] [H12243]
**
** If a separate thread makes changes on the same database connection
** while [sqlite3_changes()] is running then the value returned
** is unpredictable and not meaningful.
*/
SQLITE_API int sqlite3_changes(sqlite3*);

/*
** CAPI3REF: Total Number Of Rows Modified {H12260} <S10600>
**
** This function returns the number of row changes caused by [INSERT],
** [UPDATE] or [DELETE] statements since the [database connection] was opened.
** The count includes all changes from all 
** [CREATE TRIGGER | trigger] contexts.  However,
** the count does not include changes used to implement [REPLACE] constraints,
** do rollbacks or ABORT processing, or [DROP TABLE] processing.  The
** count does not rows of views that fire an [INSTEAD OF trigger], though if
** the INSTEAD OF trigger makes changes of its own, those changes are
** counted.
** The changes are counted as soon as the statement that makes them is
** completed (when the statement handle is passed to [sqlite3_reset()] or
** [sqlite3_finalize()]).
**











** See also the [sqlite3_changes()] interface and the
** [count_changes pragma].
**
** Requirements:
** [H12261] [H12263]
**
** If a separate thread makes changes on the same database connection
** while [sqlite3_total_changes()] is running then the value
** returned is unpredictable and not meaningful.
................................................................................
** to be interrupted and might continue to completion.
**
** An SQL operation that is interrupted will return [SQLITE_INTERRUPT].
** If the interrupted SQL operation is an INSERT, UPDATE, or DELETE
** that is inside an explicit transaction, then the entire transaction
** will be rolled back automatically.
**
** The sqlite3_interrupt(D) call is in effect until all currently running
** SQL statements on [database connection] D complete.  Any new SQL statements
** that are started after the sqlite3_interrupt() call and before the 
** running statements reaches zero are interrupted as if they had been
** running prior to the sqlite3_interrupt() call.  New SQL statements
** that are started after the running statement count reaches zero are
** not effected by the sqlite3_interrupt().
** A call to sqlite3_interrupt(D) that occurs when there are no running
** SQL statements is a no-op and has no effect on SQL statements
** that are started after the sqlite3_interrupt() call returns.
**
** Requirements:
** [H12271] [H12272]
**
** If the database connection closes while [sqlite3_interrupt()]
** is running then bad things will likely happen.
*/
SQLITE_API void sqlite3_interrupt(sqlite3*);

/*
** CAPI3REF: Determine If An SQL Statement Is Complete {H10510} <S70200>
**
** These routines are useful during command-line input to determine if the
** currently entered text seems to form a complete SQL statement or
** if additional input is needed before sending the text into
** SQLite for parsing.  These routines return 1 if the input string
** appears to be a complete SQL statement.  A statement is judged to be
** complete if it ends with a semicolon token and is not a prefix of a
** well-formed CREATE TRIGGER statement.  Semicolons that are embedded within
** string literals or quoted identifier names or comments are not
** independent tokens (they are part of the token in which they are
** embedded) and thus do not count as a statement terminator.  Whitespace
** and comments that follow the final semicolon are ignored.
**
** These routines return 0 if the statement is incomplete.  If a
** memory allocation fails, then SQLITE_NOMEM is returned.
**
** These routines do not parse the SQL statements thus
** will not detect syntactically incorrect SQL.
**
** If SQLite has not been initialized using [sqlite3_initialize()] prior 
** to invoking sqlite3_complete16() then sqlite3_initialize() is invoked
** automatically by sqlite3_complete16().  If that initialization fails,
** then the return value from sqlite3_complete16() will be non-zero
** regardless of whether or not the input SQL is complete.
**
** Requirements: [H10511] [H10512]
**
** The input to [sqlite3_complete()] must be a zero-terminated
** UTF-8 string.
**
** The input to [sqlite3_complete16()] must be a zero-terminated
................................................................................
** then the [sqlite3_prepare_v2()] or equivalent call that triggered
** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
** requested is ok.  When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v2()] or equivalent call that triggered the
** authorizer will fail with an error message explaining that
** access is denied. 






**
** The first parameter to the authorizer callback is a copy of the third
** parameter to the sqlite3_set_authorizer() interface. The second parameter
** to the callback is an integer [SQLITE_COPY | action code] that specifies
** the particular action to be authorized. The third through sixth parameters
** to the callback are zero-terminated strings that contain additional
** details about the action to be authorized.
**
** If the action code is [SQLITE_READ]
** and the callback returns [SQLITE_IGNORE] then the
** [prepared statement] statement is constructed to substitute
** a NULL value in place of the table column that would have
** been read if [SQLITE_OK] had been returned.  The [SQLITE_IGNORE]
** return can be used to deny an untrusted user access to individual
** columns of a table.
** If the action code is [SQLITE_DELETE] and the callback returns
** [SQLITE_IGNORE] then the [DELETE] operation proceeds but the
** [truncate optimization] is disabled and all rows are deleted individually.
**
** An authorizer is used when [sqlite3_prepare | preparing]
** SQL statements from an untrusted source, to ensure that the SQL statements
** do not try to access data they are not allowed to see, or that they do not
** try to execute malicious statements that damage the database.  For
** example, an application may allow a user to enter arbitrary
** SQL queries for evaluation by a database.  But the application does
** not want the user to be able to make arbitrary changes to the
................................................................................
** When [sqlite3_prepare_v2()] is used to prepare a statement, the
** statement might be reprepared during [sqlite3_step()] due to a 
** schema change.  Hence, the application should ensure that the
** correct authorizer callback remains in place during the [sqlite3_step()].
**
** Note that the authorizer callback is invoked only during
** [sqlite3_prepare()] or its variants.  Authorization is not
** performed during statement evaluation in [sqlite3_step()], unless
** as stated in the previous paragraph, sqlite3_step() invokes
** sqlite3_prepare_v2() to reprepare a statement after a schema change.
**
** Requirements:
** [H12501] [H12502] [H12503] [H12504] [H12505] [H12506] [H12507] [H12510]
** [H12511] [H12512] [H12520] [H12521] [H12522]
*/
SQLITE_API int sqlite3_set_authorizer(
  sqlite3*,
................................................................................
** CAPI3REF: Compiling An SQL Statement {H13010} <S10000>
** KEYWORDS: {SQL statement compiler}
**
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.
**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
**
** The second argument, "zSql", is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare() and sqlite3_prepare_v2()
** interfaces use UTF-8, and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16.
**
** If the nByte argument is less than zero, then zSql is read up to the
................................................................................
** zSql string ends at either the first '\000' or '\u0000' character or
** the nByte-th byte, whichever comes first. If the caller knows
** that the supplied string is nul-terminated, then there is a small
** performance advantage to be gained by passing an nByte parameter that
** is equal to the number of bytes in the input string <i>including</i>
** the nul-terminator bytes.
**
** If pzTail is not NULL then *pzTail is made to point to the first byte
** past the end of the first SQL statement in zSql.  These routines only
** compile the first statement in zSql, so *pzTail is left pointing to
** what remains uncompiled.
**
** *ppStmt is left pointing to a compiled [prepared statement] that can be
** executed using [sqlite3_step()].  If there is an error, *ppStmt is set
** to NULL.  If the input text contains no SQL (if the input is an empty
** string or a comment) then *ppStmt is set to NULL.
** The calling procedure is responsible for deleting the compiled
** SQL statement using [sqlite3_finalize()] after it has finished with it.
** ppStmt may not be NULL.
**
** On success, [SQLITE_OK] is returned, otherwise an [error code] is returned.
**
** The sqlite3_prepare_v2() and sqlite3_prepare16_v2() interfaces are
** recommended for all new programs. The two older interfaces are retained
** for backwards compatibility, but their use is discouraged.
** In the "v2" interfaces, the prepared statement
................................................................................
**
** The name of the new collation sequence is specified as a UTF-8 string
** for sqlite3_create_collation() and sqlite3_create_collation_v2()
** and a UTF-16 string for sqlite3_create_collation16(). In all cases
** the name is passed as the second function argument.
**
** The third argument may be one of the constants [SQLITE_UTF8],
** [SQLITE_UTF16LE], or [SQLITE_UTF16BE], indicating that the user-supplied
** routine expects to be passed pointers to strings encoded using UTF-8,
** UTF-16 little-endian, or UTF-16 big-endian, respectively. The
** third argument might also be [SQLITE_UTF16] to indicate that the routine
** expects pointers to be UTF-16 strings in the native byte order, or the
** argument can be [SQLITE_UTF16_ALIGNED] if the
** the routine expects pointers to 16-bit word aligned strings
** of UTF-16 in the native byte order.
**
** A pointer to the user supplied routine must be passed as the fifth
** argument.  If it is NULL, this is the same as deleting the collation
** sequence (so that SQLite cannot call it anymore).
** Each time the application supplied function is invoked, it is passed
** as its first parameter a copy of the void* passed as the fourth argument
** to sqlite3_create_collation() or sqlite3_create_collation16().
................................................................................
** except that it takes an extra argument which is a destructor for
** the collation.  The destructor is called when the collation is
** destroyed and is passed a copy of the fourth parameter void* pointer
** of the sqlite3_create_collation_v2().
** Collations are destroyed when they are overridden by later calls to the
** collation creation functions or when the [database connection] is closed
** using [sqlite3_close()].
**
** See also:  [sqlite3_collation_needed()] and [sqlite3_collation_needed16()].
**
** Requirements:
** [H16603] [H16604] [H16606] [H16609] [H16612] [H16615] [H16618] [H16621]
** [H16624] [H16627] [H16630]
*/
SQLITE_API int sqlite3_create_collation(
  sqlite3*, 
................................................................................
**
** If this global variable is made to point to a string which is
** the name of a folder (a.k.a. directory), then all temporary files
** created by SQLite will be placed in that directory.  If this variable
** is a NULL pointer, then SQLite performs a search for an appropriate
** temporary file directory.
**
** It is not safe to read or modify this variable in more than one
** thread at a time.  It is not safe to read or modify this variable
** if a [database connection] is being used at the same time in a separate
** thread.
** It is intended that this variable be set once
** as part of process initialization and before any SQLite interface
** routines have been called and that this variable remain unchanged
** thereafter.
**
** The [temp_store_directory pragma] may modify this variable and cause
** it to point to memory obtained from [sqlite3_malloc].  Furthermore,
** the [temp_store_directory pragma] always assumes that any string
** that this variable points to is held in memory obtained from 
** [sqlite3_malloc] and the pragma may attempt to free that memory
** using [sqlite3_free].
** Hence, if this variable is modified directly, either it should be
** made NULL or made to point to memory obtained from [sqlite3_malloc]
** or else the use of the [temp_store_directory pragma] should be avoided.
*/
SQLITE_API char *sqlite3_temp_directory;

/*
** CAPI3REF: Test For Auto-Commit Mode {H12930} <S60200>
** KEYWORDS: {autocommit mode}
**
................................................................................
typedef struct sqlite3_vtab sqlite3_vtab;
typedef struct sqlite3_index_info sqlite3_index_info;
typedef struct sqlite3_vtab_cursor sqlite3_vtab_cursor;
typedef struct sqlite3_module sqlite3_module;

/*
** CAPI3REF: Virtual Table Object {H18000} <S20400>
** KEYWORDS: sqlite3_module {virtual table module}
** EXPERIMENTAL
**
** This structure, sometimes called a a "virtual table module", 
** defines the implementation of a [virtual tables].  
** This structure consists mostly of methods for the module.
**
** A virtual table module is created by filling in a persistent
** instance of this structure and passing a pointer to that instance
** to [sqlite3_create_module()] or [sqlite3_create_module_v2()].
** The registration remains valid until it is replaced by a different
** module or until the [database connection] closes.  The content
** of this structure must not change while it is registered with
** any database connection.
*/
struct sqlite3_module {
  int iVersion;
  int (*xCreate)(sqlite3*, void *pAux,
               int argc, const char *const*argv,
               sqlite3_vtab **ppVTab, char**);
  int (*xConnect)(sqlite3*, void *pAux,
................................................................................

/*
** CAPI3REF: Virtual Table Indexing Information {H18100} <S20400>
** KEYWORDS: sqlite3_index_info
** EXPERIMENTAL
**
** The sqlite3_index_info structure and its substructures is used to
** pass information into and receive the reply from the [xBestIndex]
** method of a [virtual table module].  The fields under **Inputs** are the
** inputs to xBestIndex and are read-only.  xBestIndex inserts its
** results into the **Outputs** fields.
**
** The aConstraint[] array records WHERE clause constraints of the form:
**
** <pre>column OP expr</pre>
**
................................................................................
** get as many WHERE clause terms into the form shown above as possible.
** The aConstraint[] array only reports WHERE clause terms in the correct
** form that refer to the particular virtual table being queried.
**
** Information about the ORDER BY clause is stored in aOrderBy[].
** Each term of aOrderBy records a column of the ORDER BY clause.
**
** The [xBestIndex] method must fill aConstraintUsage[] with information
** about what parameters to pass to xFilter.  If argvIndex>0 then
** the right-hand side of the corresponding aConstraint[] is evaluated
** and becomes the argvIndex-th entry in argv.  If aConstraintUsage[].omit
** is true, then the constraint is assumed to be fully handled by the
** virtual table and is not checked again by SQLite.
**
** The idxNum and idxPtr values are recorded and passed into the
** [xFilter] method.
** [sqlite3_free()] is used to free idxPtr if and only iff
** needToFreeIdxPtr is true.
**
** The orderByConsumed means that output from [xFilter]/[xNext] will occur in
** the correct order to satisfy the ORDER BY clause so that no separate
** sorting step is required.
**
** The estimatedCost value is an estimate of the cost of doing the
** particular lookup.  A full scan of a table with N entries should have
** a cost of N.  A binary search of a table of N entries should have a
** cost of approximately log(N).



*/
struct sqlite3_index_info {
  /* Inputs */
  int nConstraint;           /* Number of entries in aConstraint */
  struct sqlite3_index_constraint {
     int iColumn;              /* Column on left-hand side of constraint */
     unsigned char op;         /* Constraint operator */
................................................................................
#define SQLITE_INDEX_CONSTRAINT_GE    32
#define SQLITE_INDEX_CONSTRAINT_MATCH 64

/*
** CAPI3REF: Register A Virtual Table Implementation {H18200} <S20400>
** EXPERIMENTAL
**
** This routine is used to register a new [virtual table module] name.
** Module names must be registered before
** creating a new [virtual table] using the module, or before using a
** preexisting [virtual table] for the module.
**
** The module name is registered on the [database connection] specified
** by the first parameter.  The name of the module is given by the 
** second parameter.  The third parameter is a pointer to
** the implementation of the [virtual table module].   The fourth
** parameter is an arbitrary client data pointer that is passed through
** into the [xCreate] and [xConnect] methods of the virtual table module
** when a new virtual table is be being created or reinitialized.
**
** This interface has exactly the same effect as calling
** [sqlite3_create_module_v2()] with a NULL client data destructor.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_create_module(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *p,   /* Methods for the module */
  void *pClientData          /* Client data for xCreate/xConnect */
);

/*
** CAPI3REF: Register A Virtual Table Implementation {H18210} <S20400>
** EXPERIMENTAL
**
** This routine is identical to the [sqlite3_create_module()] method,
** except that it has an extra parameter to specify 
** a destructor function for the client data pointer.  SQLite will
** invoke the destructor function (if it is not NULL) when SQLite
** no longer needs the pClientData pointer.  
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_create_module_v2(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *p,   /* Methods for the module */
  void *pClientData,         /* Client data for xCreate/xConnect */
  void(*xDestroy)(void*)     /* Module destructor function */
);

/*
** CAPI3REF: Virtual Table Instance Object {H18010} <S20400>
** KEYWORDS: sqlite3_vtab
** EXPERIMENTAL
**
** Every [virtual table module] implementation uses a subclass
** of the following structure to describe a particular instance
** of the [virtual table].  Each subclass will
** be tailored to the specific needs of the module implementation.
** The purpose of this superclass is to define certain fields that are
** common to all module implementations.
**
** Virtual tables methods can set an error message by assigning a
** string obtained from [sqlite3_mprintf()] to zErrMsg.  The method should
** take care that any prior string is freed by a call to [sqlite3_free()]
** prior to assigning a new string to zErrMsg.  After the error message
** is delivered up to the client application, the string will be automatically
** freed by sqlite3_free() and the zErrMsg field will be zeroed.






*/
struct sqlite3_vtab {
  const sqlite3_module *pModule;  /* The module for this virtual table */
  int nRef;                       /* Used internally */
  char *zErrMsg;                  /* Error message from sqlite3_mprintf() */
  /* Virtual table implementations will typically add additional fields */
};

/*
** CAPI3REF: Virtual Table Cursor Object  {H18020} <S20400>
** KEYWORDS: sqlite3_vtab_cursor {virtual table cursor}
** EXPERIMENTAL
**
** Every [virtual table module] implementation uses a subclass of the
** following structure to describe cursors that point into the
** [virtual table] and are used
** to loop through the virtual table.  Cursors are created using the
** [sqlite3_module.xOpen | xOpen] method of the module and are destroyed
** by the [sqlite3_module.xClose | xClose] method.  Cussors are used
** by the [xFilter], [xNext], [xEof], [xColumn], and [xRowid] methods
** of the module.  Each module implementation will define
** the content of a cursor structure to suit its own needs.
**
** This superclass exists in order to define fields of the cursor that
** are common to all implementations.



*/
struct sqlite3_vtab_cursor {
  sqlite3_vtab *pVtab;      /* Virtual table of this cursor */
  /* Virtual table implementations will typically add additional fields */
};

/*
** CAPI3REF: Declare The Schema Of A Virtual Table {H18280} <S20400>
** EXPERIMENTAL
**
** The [xCreate] and [xConnect] methods of a
** [virtual table module] call this interface
** to declare the format (the names and datatypes of the columns) of
** the virtual tables they implement.



*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_declare_vtab(sqlite3*, const char *zSQL);

/*
** CAPI3REF: Overload A Function For A Virtual Table {H18300} <S20400>
** EXPERIMENTAL
**
** Virtual tables can provide alternative implementations of functions
** using the [xFindFunction] method of the [virtual table module].  
** But global versions of those functions
** must exist in order to be overloaded.
**
** This API makes sure a global version of a function with a particular
** name and number of parameters exists.  If no such function exists
** before this API is called, a new function is created.  The implementation
** of the new function always causes an exception to be thrown.  So
** the new function is not good for anything by itself.  Its only
** purpose is to be a placeholder function that can be overloaded
** by a [virtual table].



*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_overload_function(sqlite3*, const char *zFuncName, int nArg);

/*
** The interface to the virtual-table mechanism defined above (back up
** to a comment remarkably similar to this one) is currently considered
** to be experimental.  The interface might change in incompatible ways.
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the header file for the generic hash-table implemenation
** used in SQLite.
**
** $Id: hash.h,v 1.15 2009/05/02 13:29:38 drh Exp $
*/
#ifndef _SQLITE_HASH_H_
#define _SQLITE_HASH_H_

/* Forward declarations of structures. */
typedef struct Hash Hash;
typedef struct HashElem HashElem;

/* A complete hash table is an instance of the following structure.
** The internals of this structure are intended to be opaque -- client
** code should not attempt to access or modify the fields of this structure
** directly.  Change this structure only by using the routines below.
** However, some of the "procedures" and "functions" for modifying and
** accessing this structure are really macros, so we can't really make
** this structure opaque.
**
** All elements of the hash table are on a single doubly-linked list.
** Hash.first points to the head of this list.
**
** There are Hash.htsize buckets.  Each bucket points to a spot in
** the global doubly-linked list.  The contents of the bucket are the
** element pointed to plus the next _ht.count-1 elements in the list.
**
** Hash.htsize and Hash.ht may be zero.  In that case lookup is done
** by a linear search of the global list.  For small tables, the 
** Hash.ht table is never allocated because if there are few elements
** in the table, it is faster to do a linear search than to manage
** the hash table.
*/
struct Hash {

  unsigned int htsize;      /* Number of buckets in the hash table */
  unsigned int count;       /* Number of entries in this table */
  HashElem *first;          /* The first element of the array */
  struct _ht {              /* the hash table */
    int count;                 /* Number of entries with this hash */
    HashElem *chain;           /* Pointer to first entry with this hash */
  } *ht;
};
................................................................................
/* Each element in the hash table is an instance of the following 
** structure.  All elements are stored on a single doubly-linked list.
**
** Again, this structure is intended to be opaque, but it can't really
** be opaque because it is used by macros.
*/
struct HashElem {
  HashElem *next, *prev;       /* Next and previous elements in the table */
  void *data;                  /* Data associated with this element */
  const char *pKey; int nKey;  /* Key associated with this element */
};

/*
** Access routines.  To delete, insert a NULL pointer.
*/
SQLITE_PRIVATE void sqlite3HashInit(Hash*);
SQLITE_PRIVATE void *sqlite3HashInsert(Hash*, const char *pKey, int nKey, void *pData);
SQLITE_PRIVATE void *sqlite3HashFind(const Hash*, const char *pKey, int nKey);

SQLITE_PRIVATE void sqlite3HashClear(Hash*);

/*
** Macros for looping over all elements of a hash table.  The idiom is
** like this:
**
**   Hash h;
................................................................................
**     SomeStructure *pData = sqliteHashData(p);
**     // do something with pData
**   }
*/
#define sqliteHashFirst(H)  ((H)->first)
#define sqliteHashNext(E)   ((E)->next)
#define sqliteHashData(E)   ((E)->data)
/* #define sqliteHashKey(E)    ((E)->pKey) // NOT USED */
/* #define sqliteHashKeysize(E) ((E)->nKey)  // NOT USED */

/*
** Number of entries in a hash table
*/
/* #define sqliteHashCount(H)  ((H)->count) // NOT USED */

#endif /* _SQLITE_HASH_H_ */

/************** End of hash.h ************************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
/************** Include parse.h in the middle of sqliteInt.h *****************/
/************** Begin file parse.h *******************************************/
................................................................................
#define ROUND8(x)     (((x)+7)&~7)

/*
** Round down to the nearest multiple of 8
*/
#define ROUNDDOWN8(x) ((x)&~7)

/*
** Assert that the pointer X is aligned to an 8-byte boundary.
*/
#define EIGHT_BYTE_ALIGNMENT(X)   ((((char*)(X) - (char*)0)&7)==0)

/*
** An instance of the following structure is used to store the busy-handler
** callback for a given sqlite handle. 
**
** The sqlite.busyHandler member of the sqlite struct contains the busy
** callback for the database handle. Each pager opened via the sqlite
** handle is passed a pointer to sqlite.busyHandler. The busy-handler
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.  See comments in the source code for a detailed description
** of what each interface routine does.
**
** @(#) $Id: btree.h,v 1.114 2009/05/04 11:42:30 danielk1977 Exp $
*/
#ifndef _BTREE_H_
#define _BTREE_H_

/* TODO: This definition is just included so other modules compile. It
** needs to be revisited.
*/
................................................................................
#define BTREE_READWRITE    16  /* Open for both reading and writing */
#define BTREE_CREATE       32  /* Create the database if it does not exist */

SQLITE_PRIVATE int sqlite3BtreeClose(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetCacheSize(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeSetSafetyLevel(Btree*,int,int);
SQLITE_PRIVATE int sqlite3BtreeSyncDisabled(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree*,int,int,int);
SQLITE_PRIVATE int sqlite3BtreeGetPageSize(Btree*);
SQLITE_PRIVATE int sqlite3BtreeMaxPageCount(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeGetReserve(Btree*);
SQLITE_PRIVATE int sqlite3BtreeSetAutoVacuum(Btree *, int);
SQLITE_PRIVATE int sqlite3BtreeGetAutoVacuum(Btree *);
SQLITE_PRIVATE int sqlite3BtreeBeginTrans(Btree*,int);
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseOne(Btree*, const char *zMaster);
................................................................................
  int bias,
  int *pRes
);
SQLITE_PRIVATE int sqlite3BtreeCursorHasMoved(BtCursor*, int*);
SQLITE_PRIVATE int sqlite3BtreeDelete(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreeInsert(BtCursor*, const void *pKey, i64 nKey,
                                  const void *pData, int nData,
                                  int nZero, int bias, int seekResult);
SQLITE_PRIVATE int sqlite3BtreeFirst(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeEof(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreeFlags(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeKeySize(BtCursor*, i64 *pSize);
................................................................................
#endif

/*
** If we are not using shared cache, then there is no need to
** use mutexes to access the BtShared structures.  So make the
** Enter and Leave procedures no-ops.
*/
#ifndef SQLITE_OMIT_SHARED_CACHE
SQLITE_PRIVATE   void sqlite3BtreeEnter(Btree*);
SQLITE_PRIVATE   void sqlite3BtreeEnterAll(sqlite3*);
#else
# define sqlite3BtreeEnter(X) 
# define sqlite3BtreeEnterAll(X)
#endif

#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE
SQLITE_PRIVATE   void sqlite3BtreeLeave(Btree*);
SQLITE_PRIVATE   void sqlite3BtreeEnterCursor(BtCursor*);
SQLITE_PRIVATE   void sqlite3BtreeLeaveCursor(BtCursor*);

SQLITE_PRIVATE   void sqlite3BtreeLeaveAll(sqlite3*);




SQLITE_PRIVATE   void sqlite3BtreeMutexArrayEnter(BtreeMutexArray*);
SQLITE_PRIVATE   void sqlite3BtreeMutexArrayLeave(BtreeMutexArray*);
SQLITE_PRIVATE   void sqlite3BtreeMutexArrayInsert(BtreeMutexArray*, Btree*);



#ifndef NDEBUG
  /* These routines are used inside assert() statements only. */
SQLITE_PRIVATE   int sqlite3BtreeHoldsMutex(Btree*);
SQLITE_PRIVATE   int sqlite3BtreeHoldsAllMutexes(sqlite3*);
#endif
#else

# define sqlite3BtreeLeave(X)
# define sqlite3BtreeEnterCursor(X)
# define sqlite3BtreeLeaveCursor(X)

# define sqlite3BtreeLeaveAll(X)




# define sqlite3BtreeMutexArrayEnter(X)
# define sqlite3BtreeMutexArrayLeave(X)
# define sqlite3BtreeMutexArrayInsert(X,Y)

# define sqlite3BtreeHoldsMutex(X) 1
# define sqlite3BtreeHoldsAllMutexes(X) 1
#endif


#endif /* _BTREE_H_ */

/************** End of btree.h ***********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/
................................................................................
*************************************************************************
** Header file for the Virtual DataBase Engine (VDBE)
**
** This header defines the interface to the virtual database engine
** or VDBE.  The VDBE implements an abstract machine that runs a
** simple program to access and modify the underlying database.
**
** $Id: vdbe.h,v 1.141 2009/04/10 00:56:29 drh Exp $
*/
#ifndef _SQLITE_VDBE_H_
#define _SQLITE_VDBE_H_

/*
** A single VDBE is an opaque structure named "Vdbe".  Only routines
** in the source file sqliteVdbe.c are allowed to see the insides
................................................................................
#define OP_SCopy                                9
#define OP_Eq                                  74   /* same as TK_EQ       */
#define OP_OpenWrite                           10
#define OP_NotNull                             72   /* same as TK_NOTNULL  */
#define OP_If                                  11
#define OP_ToInt                              142   /* same as TK_TO_INT   */
#define OP_String8                             94   /* same as TK_STRING   */

#define OP_CollSeq                             12
#define OP_OpenRead                            13
#define OP_Expire                              14
#define OP_AutoCommit                          15
#define OP_Gt                                  75   /* same as TK_GT       */
#define OP_Pagecount                           16
#define OP_IntegrityCk                         17
#define OP_Sort                                18
#define OP_Copy                                20
#define OP_Trace                               21
#define OP_Function                            22
#define OP_IfNeg                               23
#define OP_And                                 67   /* same as TK_AND      */
#define OP_Subtract                            85   /* same as TK_MINUS    */
#define OP_Noop                                24
#define OP_Return                              25
#define OP_Remainder                           88   /* same as TK_REM      */
#define OP_NewRowid                            26
#define OP_Multiply                            86   /* same as TK_STAR     */
#define OP_Variable                            27
#define OP_String                              28
#define OP_RealAffinity                        29
#define OP_VRename                             30
#define OP_ParseSchema                         31
#define OP_VOpen                               32
#define OP_Close                               33
#define OP_CreateIndex                         34
#define OP_IsUnique                            35
#define OP_NotFound                            36
#define OP_Int64                               37
#define OP_MustBeInt                           38
#define OP_Halt                                39
#define OP_Rowid                               40
#define OP_IdxLT                               41
#define OP_AddImm                              42
#define OP_Statement                           43
#define OP_RowData                             44
#define OP_MemMax                              45
#define OP_Or                                  66   /* same as TK_OR       */
#define OP_NotExists                           46
#define OP_Gosub                               47
#define OP_Divide                              87   /* same as TK_SLASH    */
#define OP_Integer                             48
#define OP_ToNumeric                          141   /* same as TK_TO_NUMERIC*/
#define OP_Prev                                49
#define OP_RowSetRead                          50
#define OP_Concat                              89   /* same as TK_CONCAT   */
#define OP_RowSetAdd                           51
#define OP_BitAnd                              80   /* same as TK_BITAND   */
#define OP_VColumn                             52
#define OP_CreateTable                         53
#define OP_Last                                54
#define OP_SeekLe                              55
#define OP_IsNull                              71   /* same as TK_ISNULL   */
#define OP_IncrVacuum                          56
#define OP_IdxRowid                            57
#define OP_ShiftRight                          83   /* same as TK_RSHIFT   */
#define OP_ResetCount                          58
#define OP_ContextPush                         59
#define OP_Yield                               60
#define OP_DropTrigger                         61
#define OP_DropIndex                           62
#define OP_IdxGE                               63
#define OP_IdxDelete                           64
#define OP_Vacuum                              65
#define OP_IfNot                               68
#define OP_DropTable                           69
#define OP_SeekLt                              70
#define OP_MakeRecord                          79
#define OP_ToBlob                             140   /* same as TK_TO_BLOB  */
#define OP_ResultRow                           90
#define OP_Delete                              91
#define OP_AggFinal                            92
#define OP_Compare                             95
#define OP_ShiftLeft                           82   /* same as TK_LSHIFT   */
#define OP_Goto                                96
#define OP_TableLock                           97
#define OP_Clear                               98
#define OP_Le                                  76   /* same as TK_LE       */
#define OP_VerifyCookie                        99
#define OP_AggStep                            100
#define OP_ToText                             139   /* same as TK_TO_TEXT  */
#define OP_Not                                 19   /* same as TK_NOT      */
#define OP_ToReal                             143   /* same as TK_TO_REAL  */
#define OP_SetNumColumns                      101
#define OP_Transaction                        102
#define OP_VFilter                            103
#define OP_Ne                                  73   /* same as TK_NE       */
#define OP_VDestroy                           104
#define OP_ContextPop                         105
#define OP_BitOr                               81   /* same as TK_BITOR    */
#define OP_Next                               106
#define OP_Count                              107
#define OP_IdxInsert                          108
#define OP_Lt                                  77   /* same as TK_LT       */
#define OP_SeekGe                             109
#define OP_Insert                             110
#define OP_Destroy                            111
#define OP_ReadCookie                         112
#define OP_RowSetTest                         113
#define OP_LoadAnalysis                       114
#define OP_Explain                            115
#define OP_HaltIfNull                         116
#define OP_OpenPseudo                         117
#define OP_OpenEphemeral                      118
#define OP_Null                               119
#define OP_Move                               120
................................................................................
#define OPFLG_OUT2_PRERELEASE 0x0002  /* out2-prerelease: */
#define OPFLG_IN1             0x0004  /* in1:   P1 is an input */
#define OPFLG_IN2             0x0008  /* in2:   P2 is an input */
#define OPFLG_IN3             0x0010  /* in3:   P3 is an input */
#define OPFLG_OUT3            0x0020  /* out3:  P3 is an output */
#define OPFLG_INITIALIZER {\
/*   0 */ 0x00, 0x01, 0x00, 0x00, 0x10, 0x08, 0x02, 0x00,\
/*   8 */ 0x00, 0x04, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00,\
/*  16 */ 0x02, 0x00, 0x01, 0x04, 0x04, 0x00, 0x00, 0x05,\
/*  24 */ 0x00, 0x04, 0x02, 0x00, 0x02, 0x04, 0x00, 0x00,\
/*  32 */ 0x00, 0x00, 0x02, 0x11, 0x11, 0x02, 0x05, 0x00,\
/*  40 */ 0x02, 0x11, 0x04, 0x00, 0x00, 0x0c, 0x11, 0x01,\
/*  48 */ 0x02, 0x01, 0x21, 0x08, 0x00, 0x02, 0x01, 0x11,\
/*  56 */ 0x01, 0x02, 0x00, 0x00, 0x04, 0x00, 0x00, 0x11,\
/*  64 */ 0x00, 0x00, 0x2c, 0x2c, 0x05, 0x00, 0x11, 0x05,\
/*  72 */ 0x05, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x00,\
/*  80 */ 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c, 0x2c,\
/*  88 */ 0x2c, 0x2c, 0x00, 0x00, 0x00, 0x04, 0x02, 0x00,\
/*  96 */ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,\
/* 104 */ 0x00, 0x00, 0x01, 0x02, 0x08, 0x11, 0x00, 0x02,\
/* 112 */ 0x02, 0x15, 0x00, 0x00, 0x10, 0x00, 0x00, 0x02,\
/* 120 */ 0x00, 0x02, 0x01, 0x11, 0x00, 0x00, 0x05, 0x00,\
/* 128 */ 0x11, 0x05, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00,\
/* 136 */ 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04,\
}

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/
................................................................................
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, int);
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*);

#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
SQLITE_PRIVATE int sqlite3VdbeReleaseMemory(int);
#endif
SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack(KeyInfo*,int,const void*,char*,int);

SQLITE_PRIVATE void sqlite3VdbeDeleteUnpackedRecord(UnpackedRecord*);
SQLITE_PRIVATE int sqlite3VdbeRecordCompare(int,const void*,UnpackedRecord*);


#ifndef NDEBUG
SQLITE_PRIVATE   void sqlite3VdbeComment(Vdbe*, const char*, ...);
# define VdbeComment(X)  sqlite3VdbeComment X
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite page cache
** subsystem.  The page cache subsystem reads and writes a file a page
** at a time and provides a journal for rollback.
**
** @(#) $Id: pager.h,v 1.101 2009/04/30 09:10:38 danielk1977 Exp $
*/

#ifndef _PAGER_H_
#define _PAGER_H_

/*
** Default maximum size for persistent journal files. A negative 
................................................................................
SQLITE_PRIVATE int sqlite3PagerMovepage(Pager*,DbPage*,Pgno,int);
SQLITE_PRIVATE int sqlite3PagerPageRefcount(DbPage*);
SQLITE_PRIVATE void *sqlite3PagerGetData(DbPage *); 
SQLITE_PRIVATE void *sqlite3PagerGetExtra(DbPage *); 

/* Functions used to manage pager transactions and savepoints. */
SQLITE_PRIVATE int sqlite3PagerPagecount(Pager*, int*);
SQLITE_PRIVATE int sqlite3PagerBegin(Pager*, int exFlag, int);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, int);
SQLITE_PRIVATE int sqlite3PagerSync(Pager *pPager);
SQLITE_PRIVATE int sqlite3PagerCommitPhaseTwo(Pager*);
SQLITE_PRIVATE int sqlite3PagerRollback(Pager*);
SQLITE_PRIVATE int sqlite3PagerOpenSavepoint(Pager *pPager, int n);
SQLITE_PRIVATE int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint);

................................................................................
** statements.
*/
struct Schema {
  int schema_cookie;   /* Database schema version number for this file */
  Hash tblHash;        /* All tables indexed by name */
  Hash idxHash;        /* All (named) indices indexed by name */
  Hash trigHash;       /* All triggers indexed by name */

  Table *pSeqTab;      /* The sqlite_sequence table used by AUTOINCREMENT */
  u8 file_format;      /* Schema format version for this file */
  u8 enc;              /* Text encoding used by this database */
  u16 flags;           /* Flags associated with this schema */
  int cache_size;      /* Number of pages to use in the cache */
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3 *db;         /* "Owner" connection. See comment above */
................................................................................
  int nSavepoint;               /* Number of non-transaction savepoints */
  int nStatement;               /* Number of nested statement-transactions  */
  u8 isTransactionSavepoint;    /* True if the outermost savepoint is a TS */

#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
  /* The following variables are all protected by the STATIC_MASTER 
  ** mutex, not by sqlite3.mutex. They are used by code in notify.c. 
  **
  ** When X.pUnlockConnection==Y, that means that X is waiting for Y to
  ** unlock so that it can proceed.
  **
  ** When X.pBlockingConnection==Y, that means that something that X tried
  ** tried to do recently failed with an SQLITE_LOCKED error due to locks
  ** held by Y.
  */
  sqlite3 *pBlockingConnection; /* Connection that caused SQLITE_LOCKED */
  sqlite3 *pUnlockConnection;           /* Connection to watch for unlock */
  void *pUnlockArg;                     /* Argument to xUnlockNotify */
  void (*xUnlockNotify)(void **, int);  /* Unlock notify callback */
  sqlite3 *pNextBlocked;        /* Next in list of all blocked connections */
#endif
................................................................................
#define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */
#define SQLITE_LegacyFileFmt  0x00008000  /* Create new databases in format 1 */
#define SQLITE_FullFSync      0x00010000  /* Use full fsync on the backend */
#define SQLITE_LoadExtension  0x00020000  /* Enable load_extension */

#define SQLITE_RecoveryMode   0x00040000  /* Ignore schema errors */
#define SQLITE_SharedCache    0x00080000  /* Cache sharing is enabled */

#define SQLITE_CommitBusy     0x00200000  /* In the process of committing */
#define SQLITE_ReverseOrder   0x00400000  /* Reverse unordered SELECTs */

/*
** Possible values for the sqlite.magic field.
** The numbers are obtained at random and have no special meaning, other
** than being distinct from one another.
................................................................................
**       b INTEGER CONSTRAINT fk1 REFERENCES ex2(x)
**     );
**
** For foreign key "fk1", the from-table is "ex1" and the to-table is "ex2".
**
** Each REFERENCES clause generates an instance of the following structure
** which is attached to the from-table.  The to-table need not exist when
** the from-table is created.  The existence of the to-table is not checked.






*/
struct FKey {
  Table *pFrom;     /* The table that contains the REFERENCES clause */
  FKey *pNextFrom;  /* Next foreign key in pFrom */
  char *zTo;        /* Name of table that the key points to */

  int nCol;         /* Number of columns in this key */




  u8 isDeferred;    /* True if constraint checking is deferred till COMMIT */
  u8 updateConf;    /* How to resolve conflicts that occur on UPDATE */
  u8 deleteConf;    /* How to resolve conflicts that occur on DELETE */
  u8 insertConf;    /* How to resolve conflicts that occur on INSERT */
  struct sColMap {  /* Mapping of columns in pFrom to columns in zTo */
    int iFrom;         /* Index of column in pFrom */
    char *zCol;        /* Name of column in zTo.  If 0 use PRIMARY KEY */
  } aCol[1];        /* One entry for each of nCol column s */
};

/*
** SQLite supports many different ways to resolve a constraint
** error.  ROLLBACK processing means that a constraint violation
** causes the operation in process to fail and for the current transaction
** to be rolled back.  ABORT processing means the operation in process
................................................................................
** This structure holds a record that has already been disassembled
** into its constituent fields.
*/
struct UnpackedRecord {
  KeyInfo *pKeyInfo;  /* Collation and sort-order information */
  u16 nField;         /* Number of entries in apMem[] */
  u16 flags;          /* Boolean settings.  UNPACKED_... below */
  i64 rowid;          /* Used by UNPACKED_PREFIX_SEARCH */
  Mem *aMem;          /* Values */
};

/*
** Allowed values of UnpackedRecord.flags
*/
#define UNPACKED_NEED_FREE     0x0001  /* Memory is from sqlite3Malloc() */
#define UNPACKED_NEED_DESTROY  0x0002  /* apMem[]s should all be destroyed */
#define UNPACKED_IGNORE_ROWID  0x0004  /* Ignore trailing rowid on key1 */
#define UNPACKED_INCRKEY       0x0008  /* Make this key an epsilon larger */
#define UNPACKED_PREFIX_MATCH  0x0010  /* A prefix match is considered OK */
#define UNPACKED_PREFIX_SEARCH 0x0020  /* A prefix match is considered OK */

/*
** Each SQL index is represented in memory by an
** instance of the following structure.
**
** The columns of the table that are to be indexed are described
** by the aiColumn[] field of this structure.  For example, suppose
................................................................................
**
** Note if Token.z==0 then Token.dyn and Token.n are undefined and
** may contain random values.  Do not make any assumptions about Token.dyn
** and Token.n when Token.z==0.
*/
struct Token {
  const unsigned char *z; /* Text of the token.  Not NULL-terminated! */
  unsigned dyn    : 1;    /* True for malloced memory, false for static */
  unsigned quoted : 1;    /* True if token still has its quotes */
  unsigned n      : 30;   /* Number of characters in this token */
};

/*
** An instance of this structure contains information needed to generate
** code for a SELECT that contains aggregate functions.
**
** If Expr.op==TK_AGG_COLUMN or TK_AGG_FUNCTION then Expr.pAggInfo is a
................................................................................
**
** If the Expr is of type OP_Column, and the table it is selecting from
** is a disk table or the "old.*" pseudo-table, then pTab points to the
** corresponding table definition.
**
** ALLOCATION NOTES:
**
** Expr objects can use a lot of memory space in database schema.  To
** help reduce memory requirements, sometimes an Expr object will be
** truncated.  And to reduce the number of memory allocations, sometimes
** two or more Expr objects will be stored in a single memory allocation,
** together with Expr.token and/or Expr.span strings.
**
** If the EP_Reduced, EP_SpanToken, and EP_TokenOnly flags are set when
** an Expr object is truncated.  When EP_Reduced is set, then all
** the child Expr objects in the Expr.pLeft and Expr.pRight subtrees
** are contained within the same memory allocation.  Note, however, that
** the subtrees in Expr.x.pList or Expr.x.pSelect are always separately
** allocated, regardless of whether or not EP_Reduced is set.

*/
struct Expr {
  u8 op;                 /* Operation performed by this node */
  char affinity;         /* The affinity of the column or 0 if not a column */
  VVA_ONLY(u8 vvaFlags;) /* Flags used for VV&A only.  EVVA_* below. */
  u16 flags;             /* Various flags.  EP_* See below */
  Token token;           /* An operand token */
................................................................................
  /* If the EP_TokenOnly flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction. 
  *********************************************************************/

  Token span;            /* Complete text of the expression */

  /* If the EP_SpanToken flag is set in the Expr.flags mask, then no
  ** space is allocated for the fields below this point. An attempt to
  ** access them will result in a segfault or malfunction. 
  *********************************************************************/

  Expr *pLeft;           /* Left subnode */
  Expr *pRight;          /* Right subnode */
  union {
................................................................................
*/
#define EP_FromJoin   0x0001  /* Originated in ON or USING clause of a join */
#define EP_Agg        0x0002  /* Contains one or more aggregate functions */
#define EP_Resolved   0x0004  /* IDs have been resolved to COLUMNs */
#define EP_Error      0x0008  /* Expression contains one or more errors */
#define EP_Distinct   0x0010  /* Aggregate function with DISTINCT keyword */
#define EP_VarSelect  0x0020  /* pSelect is correlated, not constant */
#define EP_DblQuoted  0x0040  /* token.z was originally in "..." */
#define EP_InfixFunc  0x0080  /* True for an infix function: LIKE, GLOB, etc */
#define EP_ExpCollate 0x0100  /* Collating sequence specified explicitly */
#define EP_AnyAff     0x0200  /* Can take a cached column of any affinity */
#define EP_FixedDest  0x0400  /* Result needed in a specific register */
#define EP_IntValue   0x0800  /* Integer value contained in iTable */
#define EP_xIsSelect  0x1000  /* x.pSelect is valid (otherwise x.pList is) */

#define EP_Reduced    0x2000  /* Expr struct is EXPR_REDUCEDSIZE bytes only */
#define EP_TokenOnly  0x4000  /* Expr struct is EXPR_TOKENONLYSIZE bytes only */
#define EP_SpanToken  0x8000  /* Expr size is EXPR_SPANTOKENSIZE bytes */

/*
** The following are the meanings of bits in the Expr.vvaFlags field.
** This information is only used when SQLite is compiled with
** SQLITE_DEBUG defined.
*/
#ifndef NDEBUG
................................................................................
#define ExprClearProperty(E,P)   (E)->flags&=~(P)

/*
** Macros to determine the number of bytes required by a normal Expr 
** struct, an Expr struct with the EP_Reduced flag set in Expr.flags 
** and an Expr struct with the EP_TokenOnly flag set.
*/
#define EXPR_FULLSIZE           sizeof(Expr)           /* Full size */
#define EXPR_REDUCEDSIZE        offsetof(Expr,iTable)  /* Common features */
#define EXPR_SPANTOKENSIZE      offsetof(Expr,pLeft)   /* Fewer features */
#define EXPR_TOKENONLYSIZE      offsetof(Expr,span)    /* Smallest possible */


/*
** Flags passed to the sqlite3ExprDup() function. See the header comment 
** above sqlite3ExprDup() for details.
*/
#define EXPRDUP_REDUCE         0x0001  /* Used reduced-size Expr nodes */
#define EXPRDUP_SPAN           0x0002  /* Make a copy of Expr.span */


/*
** A list of expressions.  Each expression may optionally have a
** name.  An expr/name combination can be used in several ways, such
** as the list of "expr AS ID" fields following a "SELECT" or in the
** list of "ID = expr" items in an UPDATE.  A list of expressions can
** also be used as the argument to a function, in which case the a.zName
................................................................................
  ** a convenient place since there is one WhereLevel for each FROM clause
  ** element.
  */
  sqlite3_index_info *pIdxInfo;  /* Index info for n-th source table */
};

/*
** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin()
** and the WhereInfo.wctrlFlags member.
*/
#define WHERE_ORDERBY_NORMAL   0x0000 /* No-op */
#define WHERE_ORDERBY_MIN      0x0001 /* ORDER BY processing for min() func */
#define WHERE_ORDERBY_MAX      0x0002 /* ORDER BY processing for max() func */
#define WHERE_ONEPASS_DESIRED  0x0004 /* Want to do one-pass UPDATE/DELETE */
#define WHERE_DUPLICATES_OK    0x0008 /* Ok to return a row more than once */
#define WHERE_OMIT_OPEN        0x0010 /* Table cursor are already open */
#define WHERE_OMIT_CLOSE       0x0020 /* Omit close of table & index cursors */
#define WHERE_FORCE_TABLE      0x0040 /* Do not use an index-only search */

/*
** The WHERE clause processing routine has two halves.  The
** first part does the start of the WHERE loop and the second
** half does the tail of the WHERE loop.  An instance of
** this structure is returned by the first half and passed
** into the second half to give some continuity.
*/
struct WhereInfo {
  Parse *pParse;       /* Parsing and code generating context */
  u16 wctrlFlags;      /* Flags originally passed to sqlite3WhereBegin() */
  u8 okOnePass;        /* Ok to use one-pass algorithm for UPDATE or DELETE */

  SrcList *pTabList;             /* List of tables in the join */
  int iTop;                      /* The very beginning of the WHERE loop */
  int iContinue;                 /* Jump here to continue with next record */
  int iBreak;                    /* Jump here to break out of the loop */
  int nLevel;                    /* Number of nested loop */
  struct WhereClause *pWC;       /* Decomposition of the WHERE clause */
  WhereLevel a[1];               /* Information about each nest loop in WHERE */
................................................................................
  u8 eDest;         /* How to dispose of the results */
  u8 affinity;      /* Affinity used when eDest==SRT_Set */
  int iParm;        /* A parameter used by the eDest disposal method */
  int iMem;         /* Base register where results are written */
  int nMem;         /* Number of registers allocated */
};

/*
** Size of the column cache
*/
#ifndef SQLITE_N_COLCACHE
# define SQLITE_N_COLCACHE 10
#endif

/*
** An SQL parser context.  A copy of this structure is passed through
** the parser and down into all the parser action routine in order to
** carry around information that is global to the entire parse.
**
** The structure is divided into two parts.  When the parser and code
** generate call themselves recursively, the first part of the structure
................................................................................
  int nRangeReg;       /* Size of the temporary register block */
  int iRangeReg;       /* First register in temporary register block */
  int nErr;            /* Number of errors seen */
  int nTab;            /* Number of previously allocated VDBE cursors */
  int nMem;            /* Number of memory cells used so far */
  int nSet;            /* Number of sets used so far */
  int ckBase;          /* Base register of data during check constraints */
  int iCacheLevel;     /* ColCache valid when aColCache[].iLevel<=iCacheLevel */
  int iCacheCnt;       /* Counter used to generate aColCache[].lru values */
  u8 nColCache;        /* Number of entries in the column cache */
  u8 iColCache;        /* Next entry of the cache to replace */
  struct yColCache {
    int iTable;           /* Table cursor number */
    int iColumn;          /* Table column number */
    u8 affChange;         /* True if this register has had an affinity change */
    u8 tempReg;           /* iReg is a temp register that needs to be freed */
    int iLevel;           /* Nesting level */
    int iReg;             /* Reg with value of this column. 0 means none. */

    int lru;              /* Least recently used entry has the smallest value */
  } aColCache[SQLITE_N_COLCACHE];  /* One for each column cache entry */
  u32 writeMask;       /* Start a write transaction on these databases */
  u32 cookieMask;      /* Bitmask of schema verified databases */
  int cookieGoto;      /* Address of OP_Goto to cookie verifier subroutine */
  int cookieValue[SQLITE_MAX_ATTACHED+2];  /* Values of cookies to verify */
#ifndef SQLITE_OMIT_SHARED_CACHE
  int nTableLock;        /* Number of locks in aTableLock */
  TableLock *aTableLock; /* Required table locks for shared-cache mode */
................................................................................
*/
struct AuthContext {
  const char *zAuthContext;   /* Put saved Parse.zAuthContext here */
  Parse *pParse;              /* The Parse structure */
};

/*
** Bitfield flags for P5 value in OP_Insert and OP_Delete
*/
#define OPFLAG_NCHANGE    1    /* Set to update db->nChange */
#define OPFLAG_LASTROWID  2    /* Set to update db->lastRowid */
#define OPFLAG_ISUPDATE   4    /* This OP_Insert is an sql UPDATE */
#define OPFLAG_APPEND     8    /* This is likely to be an append */
#define OPFLAG_USESEEKRESULT 16    /* Try to avoid a seek in BtreeInsert() */

/*
 * Each trigger present in the database schema is stored as an instance of
 * struct Trigger. 
 *
 * Pointers to instances of struct Trigger are stored in two ways.
 * 1. In the "trigHash" hash table (part of the sqlite3* that represents the 
................................................................................

/*
** Internal function prototypes
*/
SQLITE_PRIVATE int sqlite3StrICmp(const char *, const char *);
SQLITE_PRIVATE int sqlite3StrNICmp(const char *, const char *, int);
SQLITE_PRIVATE int sqlite3IsNumber(const char*, int*, u8);

SQLITE_PRIVATE int sqlite3Strlen30(const char*);

SQLITE_PRIVATE int sqlite3MallocInit(void);
SQLITE_PRIVATE void sqlite3MallocEnd(void);
SQLITE_PRIVATE void *sqlite3Malloc(int);
SQLITE_PRIVATE void *sqlite3MallocZero(int);
SQLITE_PRIVATE void *sqlite3DbMallocZero(sqlite3*, int);
................................................................................
#endif
#if defined(SQLITE_TEST)
SQLITE_PRIVATE   void *sqlite3TestTextToPtr(const char*);
#endif
SQLITE_PRIVATE void sqlite3SetString(char **, sqlite3*, const char*, ...);
SQLITE_PRIVATE void sqlite3ErrorMsg(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ErrorClear(Parse*);
SQLITE_PRIVATE int sqlite3Dequote(char*);

SQLITE_PRIVATE int sqlite3KeywordCode(const unsigned char*, int);
SQLITE_PRIVATE int sqlite3RunParser(Parse*, const char*, char **);
SQLITE_PRIVATE void sqlite3FinishCoding(Parse*);
SQLITE_PRIVATE int sqlite3GetTempReg(Parse*);
SQLITE_PRIVATE void sqlite3ReleaseTempReg(Parse*,int);
SQLITE_PRIVATE int sqlite3GetTempRange(Parse*,int);
SQLITE_PRIVATE void sqlite3ReleaseTempRange(Parse*,int,int);
................................................................................
SQLITE_PRIVATE void sqlite3BitvecDestroy(Bitvec*);
SQLITE_PRIVATE u32 sqlite3BitvecSize(Bitvec*);
SQLITE_PRIVATE int sqlite3BitvecBuiltinTest(int,int*);

SQLITE_PRIVATE RowSet *sqlite3RowSetInit(sqlite3*, void*, unsigned int);
SQLITE_PRIVATE void sqlite3RowSetClear(RowSet*);
SQLITE_PRIVATE void sqlite3RowSetInsert(RowSet*, i64);
SQLITE_PRIVATE int sqlite3RowSetTest(RowSet*, u8 iBatch, i64);
SQLITE_PRIVATE int sqlite3RowSetNext(RowSet*, i64*);

SQLITE_PRIVATE void sqlite3CreateView(Parse*,Token*,Token*,Token*,Select*,int,int);

#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_VIRTUALTABLE)
SQLITE_PRIVATE   int sqlite3ViewGetColumnNames(Parse*,Table*);
#else
................................................................................
SQLITE_PRIVATE int sqlite3IsReadOnly(Parse*, Table*, int);
SQLITE_PRIVATE void sqlite3OpenTable(Parse*, int iCur, int iDb, Table*, int);
#if defined(SQLITE_ENABLE_UPDATE_DELETE_LIMIT) && !defined(SQLITE_OMIT_SUBQUERY)
SQLITE_PRIVATE Expr *sqlite3LimitWhere(Parse *, SrcList *, Expr *, ExprList *, Expr *, Expr *, char *);
#endif
SQLITE_PRIVATE void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
SQLITE_PRIVATE void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
SQLITE_PRIVATE WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, u16);
SQLITE_PRIVATE void sqlite3WhereEnd(WhereInfo*);
SQLITE_PRIVATE int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCodeMove(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCodeCopy(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCacheStore(Parse*, int, int, int);
SQLITE_PRIVATE void sqlite3ExprCachePush(Parse*);
SQLITE_PRIVATE void sqlite3ExprCachePop(Parse*, int);
SQLITE_PRIVATE void sqlite3ExprCacheRemove(Parse*, int);
SQLITE_PRIVATE void sqlite3ExprCacheClear(Parse*);
SQLITE_PRIVATE void sqlite3ExprCacheAffinityChange(Parse*, int, int);
SQLITE_PRIVATE void sqlite3ExprHardCopy(Parse*,int,int);
SQLITE_PRIVATE int sqlite3ExprCode(Parse*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCodeTemp(Parse*, Expr*, int*);
SQLITE_PRIVATE int sqlite3ExprCodeTarget(Parse*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCodeAndCache(Parse*, Expr*, int);
SQLITE_PRIVATE void sqlite3ExprCodeConstants(Parse*, Expr*);
SQLITE_PRIVATE int sqlite3ExprCodeExprList(Parse*, ExprList*, int, int);
................................................................................
SQLITE_PRIVATE int sqlite3ExprIsConstantOrFunction(Expr*);
SQLITE_PRIVATE int sqlite3ExprIsInteger(Expr*, int*);
SQLITE_PRIVATE int sqlite3IsRowid(const char*);
SQLITE_PRIVATE void sqlite3GenerateRowDelete(Parse*, Table*, int, int, int);
SQLITE_PRIVATE void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int*);
SQLITE_PRIVATE int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int);
SQLITE_PRIVATE void sqlite3GenerateConstraintChecks(Parse*,Table*,int,int,
                                     int*,int,int,int,int,int*);
SQLITE_PRIVATE void sqlite3CompleteInsertion(Parse*, Table*, int, int, int*, int, int,int,int);
SQLITE_PRIVATE int sqlite3OpenTableAndIndices(Parse*, Table*, int, int);
SQLITE_PRIVATE void sqlite3BeginWriteOperation(Parse*, int, int);
SQLITE_PRIVATE Expr *sqlite3ExprDup(sqlite3*,Expr*,int);
SQLITE_PRIVATE void sqlite3TokenCopy(sqlite3*,Token*,const Token*);
SQLITE_PRIVATE ExprList *sqlite3ExprListDup(sqlite3*,ExprList*,int);
SQLITE_PRIVATE SrcList *sqlite3SrcListDup(sqlite3*,SrcList*,int);
SQLITE_PRIVATE IdList *sqlite3IdListDup(sqlite3*,IdList*);
................................................................................
SQLITE_PRIVATE   void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
#else
# define sqlite3TriggersExist(B,C,D,E,F) 0
# define sqlite3DeleteTrigger(A,B)
# define sqlite3DropTriggerPtr(A,B)
# define sqlite3UnlinkAndDeleteTrigger(A,B,C)
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I,J,K,L) 0
# define sqlite3TriggerList(X, Y) 0
#endif

SQLITE_PRIVATE int sqlite3JoinType(Parse*, Token*, Token*, Token*);
SQLITE_PRIVATE void sqlite3CreateForeignKey(Parse*, ExprList*, Token*, ExprList*, int);
SQLITE_PRIVATE void sqlite3DeferForeignKey(Parse*, int);
#ifndef SQLITE_OMIT_AUTHORIZATION
SQLITE_PRIVATE   void sqlite3AuthRead(Parse*,Expr*,Schema*,SrcList*);
................................................................................
SQLITE_PRIVATE int sqlite3FixExprList(DbFixer*, ExprList*);
SQLITE_PRIVATE int sqlite3FixTriggerStep(DbFixer*, TriggerStep*);
SQLITE_PRIVATE int sqlite3AtoF(const char *z, double*);
SQLITE_PRIVATE int sqlite3GetInt32(const char *, int*);
SQLITE_PRIVATE int sqlite3FitsIn64Bits(const char *, int);
SQLITE_PRIVATE int sqlite3Utf16ByteLen(const void *pData, int nChar);
SQLITE_PRIVATE int sqlite3Utf8CharLen(const char *pData, int nByte);
SQLITE_PRIVATE int sqlite3Utf8Read(const u8*, const u8**);

/*
** Routines to read and write variable-length integers.  These used to
** be defined locally, but now we use the varint routines in the util.c
** file.  Code should use the MACRO forms below, as the Varint32 versions
** are coded to assume the single byte case is already handled (which 
** the MACRO form does).
................................................................................
SQLITE_PRIVATE int sqlite3VtabBegin(sqlite3 *, sqlite3_vtab *);
SQLITE_PRIVATE FuncDef *sqlite3VtabOverloadFunction(sqlite3 *,FuncDef*, int nArg, Expr*);
SQLITE_PRIVATE void sqlite3InvalidFunction(sqlite3_context*,int,sqlite3_value**);
SQLITE_PRIVATE int sqlite3TransferBindings(sqlite3_stmt *, sqlite3_stmt *);
SQLITE_PRIVATE int sqlite3Reprepare(Vdbe*);
SQLITE_PRIVATE void sqlite3ExprListCheckLength(Parse*, ExprList*, const char*);
SQLITE_PRIVATE CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
SQLITE_PRIVATE int sqlite3TempInMemory(const sqlite3*);



/*
** Available fault injectors.  Should be numbered beginning with 0.
*/
#define SQLITE_FAULTINJECTOR_MALLOC     0
#define SQLITE_FAULTINJECTOR_COUNT      1
................................................................................
** This file contains the C functions that implement date and time
** functions for SQLite.  
**
** There is only one exported symbol in this file - the function
** sqlite3RegisterDateTimeFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: date.c,v 1.107 2009/05/03 20:23:53 drh Exp $
**
** SQLite processes all times and dates as Julian Day numbers.  The
** dates and times are stored as the number of days since noon
** in Greenwich on November 24, 4714 B.C. according to the Gregorian
** calendar system. 
**
** 1970-01-01 00:00:00 is JD 2440587.5
................................................................................
** as there is a year and date.
*/
static int parseDateOrTime(
  sqlite3_context *context, 
  const char *zDate, 
  DateTime *p
){
  int isRealNum;    /* Return from sqlite3IsNumber().  Not used */
  if( parseYyyyMmDd(zDate,p)==0 ){
    return 0;
  }else if( parseHhMmSs(zDate, p)==0 ){
    return 0;
  }else if( sqlite3StrICmp(zDate,"now")==0){
    setDateTimeToCurrent(context, p);
    return 0;
  }else if( sqlite3IsNumber(zDate, &isRealNum, SQLITE_UTF8) ){
    double r;
    getValue(zDate, &r);
    p->iJD = (sqlite3_int64)(r*86400000.0 + 0.5);
    p->validJD = 1;
    return 0;
  }
  return 1;
................................................................................
      /*
      **    unixepoch
      **
      ** Treat the current value of p->iJD as the number of
      ** seconds since 1970.  Convert to a real julian day number.
      */
      if( strcmp(z, "unixepoch")==0 && p->validJD ){
        p->iJD = (p->iJD + 43200)/86400 + 21086676*(i64)10000000;
        clearYMD_HMS_TZ(p);
        rc = 0;
      }
#ifndef SQLITE_OMIT_LOCALTIME
      else if( strcmp(z, "utc")==0 ){
        sqlite3_int64 c1;
        computeJD(p);
................................................................................
          sqlite3_snprintf(20, &z[j],"%.16g",x.iJD/86400000.0);
          j+=sqlite3Strlen30(&z[j]);
          break;
        }
        case 'm':  sqlite3_snprintf(3, &z[j],"%02d",x.M); j+=2; break;
        case 'M':  sqlite3_snprintf(3, &z[j],"%02d",x.m); j+=2; break;
        case 's': {
          sqlite3_snprintf(30,&z[j],"%lld",
                           (i64)(x.iJD/1000 - 21086676*(i64)10000));
          j += sqlite3Strlen30(&z[j]);
          break;
        }
        case 'S':  sqlite3_snprintf(3,&z[j],"%02d",(int)x.s); j+=2; break;
        case 'w': {
          z[j++] = (char)(((x.iJD+129600000)/86400000) % 7) + '0';
          break;
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** Memory allocation functions used throughout sqlite.
**
** $Id: malloc.c,v 1.62 2009/05/03 20:23:54 drh Exp $
*/

/*
** This routine runs when the memory allocator sees that the
** total memory allocation is about to exceed the soft heap
** limit.
*/
................................................................................
*/
SQLITE_PRIVATE char *sqlite3DbStrDup(sqlite3 *db, const char *z){
  char *zNew;
  size_t n;
  if( z==0 ){
    return 0;
  }
  n = sqlite3Strlen30(z) + 1;
  assert( (n&0x7fffffff)==n );
  zNew = sqlite3DbMallocRaw(db, (int)n);
  if( zNew ){
    memcpy(zNew, z, n);
  }
  return zNew;
}
................................................................................
/*
** The "printf" code that follows dates from the 1980's.  It is in
** the public domain.  The original comments are included here for
** completeness.  They are very out-of-date but might be useful as
** an historical reference.  Most of the "enhancements" have been backed
** out so that the functionality is now the same as standard printf().
**
** $Id: printf.c,v 1.103 2009/05/04 20:20:16 drh Exp $
**
**************************************************************************
**
** The following modules is an enhanced replacement for the "printf" subroutines
** found in the standard C library.  The following enhancements are
** supported:
**
................................................................................
                          NULL pointers replaced by SQL NULL.  %Q */
#define etTOKEN      12 /* a pointer to a Token structure */
#define etSRCLIST    13 /* a pointer to a SrcList */
#define etPOINTER    14 /* The %p conversion */
#define etSQLESCAPE3 15 /* %w -> Strings with '\"' doubled */
#define etORDINAL    16 /* %r -> 1st, 2nd, 3rd, 4th, etc.  English only */

#define etINVALID     0 /* Any unrecognized conversion type */


/*
** An "etByte" is an 8-bit unsigned value.
*/
typedef unsigned char etByte;

/*
................................................................................
  {  'E',  0, 1, etEXP,        14, 0 },
  {  'G',  0, 1, etGENERIC,    14, 0 },
#endif
  {  'i', 10, 1, etRADIX,      0,  0 },
  {  'n',  0, 0, etSIZE,       0,  0 },
  {  '%',  0, 0, etPERCENT,    0,  0 },
  {  'p', 16, 0, etPOINTER,    0,  1 },

/* All the rest have the FLAG_INTERN bit set and are thus for internal
** use only */
  {  'T',  0, 2, etTOKEN,      0,  0 },
  {  'S',  0, 2, etSRCLIST,    0,  0 },
  {  'r', 10, 3, etORDINAL,    0,  0 },
};

/*
** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
................................................................................
      }else{
        flag_longlong = 0;
      }
    }else{
      flag_long = flag_longlong = 0;
    }
    /* Fetch the info entry for the field */
    infop = &fmtinfo[0];
    xtype = etINVALID;
    for(idx=0; idx<ArraySize(fmtinfo); idx++){
      if( c==fmtinfo[idx].fmttype ){
        infop = &fmtinfo[idx];
        if( useExtended || (infop->flags & FLAG_INTERN)==0 ){
          xtype = infop->type;
        }else{
          return;
        }
        break;
      }
    }
    zExtra = 0;





    /* Limit the precision to prevent overflowing buf[] during conversion */
    if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){
      precision = etBUFSIZE-40;
    }

................................................................................
        flag_longlong = sizeof(char*)==sizeof(i64);
        flag_long = sizeof(char*)==sizeof(long int);
        /* Fall through into the next case */
      case etORDINAL:
      case etRADIX:
        if( infop->flags & FLAG_SIGNED ){
          i64 v;
          if( flag_longlong ){
            v = va_arg(ap,i64);
          }else if( flag_long ){
            v = va_arg(ap,long int);
          }else{
            v = va_arg(ap,int);
          }
          if( v<0 ){
            longvalue = -v;
            prefix = '-';
          }else{
            longvalue = v;
            if( flag_plussign )        prefix = '+';
            else if( flag_blanksign )  prefix = ' ';
            else                       prefix = 0;
          }
        }else{
          if( flag_longlong ){
            longvalue = va_arg(ap,u64);
          }else if( flag_long ){
            longvalue = va_arg(ap,unsigned long int);
          }else{
            longvalue = va_arg(ap,unsigned int);
          }
          prefix = 0;
        }
        if( longvalue==0 ) flag_alternateform = 0;
        if( flag_zeropad && precision<width-(prefix!=0) ){
          precision = width-(prefix!=0);
        }
        bufpt = &buf[etBUFSIZE-1];
................................................................................
        if( pItem->zDatabase ){
          sqlite3StrAccumAppend(pAccum, pItem->zDatabase, -1);
          sqlite3StrAccumAppend(pAccum, ".", 1);
        }
        sqlite3StrAccumAppend(pAccum, pItem->zName, -1);
        length = width = 0;
        break;
      }
      default: {
        assert( xtype==etINVALID );
        return;
      }
    }/* End switch over the format type */
    /*
    ** The text of the conversion is pointed to by "bufpt" and is
    ** "length" characters long.  The field width is "width".  Do
    ** the output.
    */
................................................................................
  }/* End for loop over the format string */
} /* End of function */

/*
** Append N bytes of text from z to the StrAccum object.
*/
SQLITE_PRIVATE void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
  assert( z!=0 || N==0 );
  if( p->tooBig | p->mallocFailed ){
    testcase(p->tooBig);
    testcase(p->mallocFailed);
    return;
  }
  if( N<0 ){
    N = sqlite3Strlen30(z);
  }
  if( N==0 || NEVER(z==0) ){
    return;
  }
  if( p->nChar+N >= p->nAlloc ){
    char *zNew;
    if( !p->useMalloc ){
      p->tooBig = 1;
      N = p->nAlloc - p->nChar - 1;
................................................................................
** Print into memory obtained from sqliteMalloc().  Use the internal
** %-conversion extensions.
*/
SQLITE_PRIVATE char *sqlite3VMPrintf(sqlite3 *db, const char *zFormat, va_list ap){
  char *z;
  char zBase[SQLITE_PRINT_BUF_SIZE];
  StrAccum acc;
  assert( db!=0 );
  sqlite3StrAccumInit(&acc, zBase, sizeof(zBase),
                      db->aLimit[SQLITE_LIMIT_LENGTH]);
  acc.db = db;
  sqlite3VXPrintf(&acc, 1, zFormat, ap);
  z = sqlite3StrAccumFinish(&acc);
  if( acc.mallocFailed ){
    db->mallocFailed = 1;
  }
  return z;
}

/*
** Print into memory obtained from sqliteMalloc().  Use the internal
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used to translate between UTF-8, 
** UTF-16, UTF-16BE, and UTF-16LE.
**
** $Id: utf.c,v 1.73 2009/04/01 18:40:32 drh Exp $
**
** Notes on UTF-8:
**
**   Byte-0    Byte-1    Byte-2    Byte-3    Value
**  0xxxxxxx                                 00000000 00000000 0xxxxxxx
**  110yyyyy  10xxxxxx                       00000000 00000yyy yyxxxxxx
**  1110zzzz  10yyyyyy  10xxxxxx             00000000 zzzzyyyy yyxxxxxx
................................................................................
*************************************************************************
** This is the header file for information that is private to the
** VDBE.  This information used to all be at the top of the single
** source code file "vdbe.c".  When that file became too big (over
** 6000 lines long) it was split up into several smaller files and
** this header information was factored out.
**
** $Id: vdbeInt.h,v 1.170 2009/05/04 11:42:30 danielk1977 Exp $
*/
#ifndef _VDBEINT_H_
#define _VDBEINT_H_

/*
** intToKey() and keyToInt() used to transform the rowid.  But with
** the latest versions of the design they are no-ops.
................................................................................
  char *pData;          /* Data for a NEW or OLD pseudo-table */
  i64 iKey;             /* Key for the NEW or OLD pseudo-table row */
  KeyInfo *pKeyInfo;    /* Info about index keys needed by index cursors */
  int nField;           /* Number of fields in the header */
  i64 seqCount;         /* Sequence counter */
  sqlite3_vtab_cursor *pVtabCursor;  /* The cursor for a virtual table */
  const sqlite3_module *pModule;     /* Module for cursor pVtabCursor */

  /* Result of last sqlite3BtreeMoveto() done by an OP_NotExists or 
  ** OP_IsUnique opcode on this cursor. */
  int seekResult;

  /* Cached information about the header for the data record that the
  ** cursor is currently pointing to.  Only valid if cacheValid is true.
  ** aRow might point to (ephemeral) data for the current row, or it might
  ** be NULL.
  */
  int cacheStatus;      /* Cache is valid if this matches Vdbe.cacheCtr */
................................................................................
SQLITE_PRIVATE const char *sqlite3OpcodeName(int);
SQLITE_PRIVATE int sqlite3VdbeOpcodeHasProperty(int, int);
SQLITE_PRIVATE int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve);
SQLITE_PRIVATE int sqlite3VdbeCloseStatement(Vdbe *, int);
#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
SQLITE_PRIVATE int sqlite3VdbeReleaseBuffers(Vdbe *p);
#endif

#ifndef SQLITE_OMIT_SHARED_CACHE
SQLITE_PRIVATE void sqlite3VdbeMutexArrayEnter(Vdbe *p);
#else
# define sqlite3VdbeMutexArrayEnter(p)
#endif

SQLITE_PRIVATE int sqlite3VdbeMemTranslate(Mem*, u8);
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE   void sqlite3VdbePrintSql(Vdbe*);
SQLITE_PRIVATE   void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf);
#endif
SQLITE_PRIVATE int sqlite3VdbeMemHandleBom(Mem *pMem);
................................................................................
    *zOut++ = (u8)(c&0x00FF);                                       \
  }                                                                 \
}

#define READ_UTF16LE(zIn, c){                                         \
  c = (*zIn++);                                                       \
  c += ((*zIn++)<<8);                                                 \
  if( c>=0xD800 && c<0xE000 ){                                        \
    int c2 = (*zIn++);                                                \
    c2 += ((*zIn++)<<8);                                              \
    c = (c2&0x03FF) + ((c&0x003F)<<10) + (((c&0x03C0)+0x0040)<<10);   \

  }                                                                   \
}

#define READ_UTF16BE(zIn, c){                                         \
  c = ((*zIn++)<<8);                                                  \
  c += (*zIn++);                                                      \
  if( c>=0xD800 && c<0xE000 ){                                        \
    int c2 = ((*zIn++)<<8);                                           \
    c2 += (*zIn++);                                                   \
    c = (c2&0x03FF) + ((c&0x003F)<<10) + (((c&0x03C0)+0x0040)<<10);   \

  }                                                                   \
}

/*
** Translate a single UTF-8 character.  Return the unicode value.
**
** During translation, assume that the byte that zTerm points
................................................................................
      c = (c<<6) + (0x3f & *(zIn++));                      \
    }                                                      \
    if( c<0x80                                             \
        || (c&0xFFFFF800)==0xD800                          \
        || (c&0xFFFFFFFE)==0xFFFE ){  c = 0xFFFD; }        \
  }
SQLITE_PRIVATE int sqlite3Utf8Read(
  const unsigned char *zIn,       /* First byte of UTF-8 character */

  const unsigned char **pzNext    /* Write first byte past UTF-8 char here */
){
  int c;


  /* Same as READ_UTF8() above but without the zTerm parameter.
  ** For this routine, we assume the UTF8 string is always zero-terminated.
  */
  c = *(zIn++);
  if( c>=0xc0 ){
    c = sqlite3Utf8Trans1[c-0xc0];
    while( (*zIn & 0xc0)==0x80 ){
      c = (c<<6) + (0x3f & *(zIn++));
    }
    if( c<0x80
        || (c&0xFFFFF800)==0xD800
        || (c&0xFFFFFFFE)==0xFFFE ){  c = 0xFFFD; }
  }
  *pzNext = zIn;
  return c;
}




/*
................................................................................
** The allocation (static, dynamic etc.) and encoding of the Mem may be
** changed by this function.
*/
SQLITE_PRIVATE int sqlite3VdbeMemHandleBom(Mem *pMem){
  int rc = SQLITE_OK;
  u8 bom = 0;

  assert( pMem->n>=0 );
  if( pMem->n>1 ){
    u8 b1 = *(u8 *)pMem->z;
    u8 b2 = *(((u8 *)pMem->z) + 1);
    if( b1==0xFE && b2==0xFF ){
      bom = SQLITE_UTF16BE;
    }
    if( b1==0xFF && b2==0xFE ){
      bom = SQLITE_UTF16LE;
................................................................................
**
** The translation is done in-place (since it is impossible for the
** correct UTF-8 encoding to be longer than a malformed encoding).
*/
SQLITE_PRIVATE int sqlite3Utf8To8(unsigned char *zIn){
  unsigned char *zOut = zIn;
  unsigned char *zStart = zIn;

  u32 c;

  while( zIn[0] ){
    c = sqlite3Utf8Read(zIn, (const u8**)&zIn);
    if( c!=0xfffd ){
      WRITE_UTF8(zOut, c);
    }
  }
  *zOut = 0;
  return (int)(zOut - zStart);
}
................................................................................
  }
  assert( (m.flags & MEM_Term)!=0 || db->mallocFailed );
  assert( (m.flags & MEM_Str)!=0 || db->mallocFailed );
  return (m.flags & MEM_Dyn)!=0 ? m.z : sqlite3DbStrDup(db, m.z);
}

/*
** pZ is a UTF-16 encoded unicode string at least nChar characters long.


** Return the number of bytes in the first nChar unicode characters

** in pZ.  nChar must be non-negative.
*/
SQLITE_PRIVATE int sqlite3Utf16ByteLen(const void *zIn, int nChar){
  int c;
  unsigned char const *z = zIn;
  int n = 0;
  if( SQLITE_UTF16NATIVE==SQLITE_UTF16BE ){
    /* Using an "if (SQLITE_UTF16NATIVE==SQLITE_UTF16BE)" construct here
    ** and in other parts of this file means that at one branch will
    ** not be covered by coverage testing on any single host. But coverage
    ** will be complete if the tests are run on both a little-endian and 
    ** big-endian host. Because both the UTF16NATIVE and SQLITE_UTF16BE
    ** macros are constant at compile time the compiler can determine
    ** which branch will be followed. It is therefore assumed that no runtime
    ** penalty is paid for this "if" statement.
    */
    while( n<nChar ){
      READ_UTF16BE(z, c);
      n++;
    }
  }else{
    while( n<nChar ){
      READ_UTF16LE(z, c);
      n++;
    }
  }
  return (int)(z-(unsigned char const *)zIn);
}

#if defined(SQLITE_TEST)
/*
** This routine is called from the TCL test function "translate_selftest".
** It checks that the primitives for serializing and deserializing
** characters in each encoding are inverses of each other.
*/
SQLITE_PRIVATE void sqlite3UtfSelfTest(void){
  unsigned int i, t;
  unsigned char zBuf[20];
  unsigned char *z;

  int n;
  unsigned int c;

  for(i=0; i<0x00110000; i++){
    z = zBuf;
    WRITE_UTF8(z, i);
    n = (int)(z-zBuf);
    assert( n>0 && n<=4 );
    z[0] = 0;

    z = zBuf;
    c = sqlite3Utf8Read(z, (const u8**)&z);
    t = i;
    if( i>=0xD800 && i<=0xDFFF ) t = 0xFFFD;
    if( (i&0xFFFFFFFE)==0xFFFE ) t = 0xFFFD;
    assert( c==t );
    assert( (z-zBuf)==n );
  }
  for(i=0; i<0x00110000; i++){
................................................................................
**
*************************************************************************
** Utility functions used throughout sqlite.
**
** This file contains functions for allocating memory, comparing
** strings, and stuff like that.
**
** $Id: util.c,v 1.253 2009/05/03 20:23:54 drh Exp $
*/
#include <math.h>

/*
** Routine needed to support the testcase() macro.
*/
#ifdef SQLITE_COVERAGE_TEST
SQLITE_PRIVATE void sqlite3Coverage(int x){
  static int dummy = 0;
................................................................................
  assert( ALWAYS_was_false_or_NEVER_was_true );      /* Always fails */
  return ALWAYS_was_false_or_NEVER_was_true++;       /* Not Reached */
}
#endif

/*
** Return true if the floating point value is Not a Number (NaN).
**
** Use the math library isnan() function if compiled with SQLITE_HAVE_ISNAN.
** Otherwise, we have our own implementation that works on most systems.
*/
SQLITE_PRIVATE int sqlite3IsNaN(double x){
  int rc;   /* The value return */
#if !defined(SQLITE_HAVE_ISNAN)
  /*
  ** Systems that support the isnan() library function should probably
  ** make use of it by compiling with -DSQLITE_HAVE_ISNAN.  But we have
  ** found that many systems do not have a working isnan() function so
  ** this implementation is provided as an alternative.
  **
  ** This NaN test sometimes fails if compiled on GCC with -ffast-math.
  ** On the other hand, the use of -ffast-math comes with the following
  ** warning:
  **
  **      This option [-ffast-math] should never be turned on by any
  **      -O option since it can result in incorrect output for programs
  **      which depend on an exact implementation of IEEE or ISO 
  **      rules/specifications for math functions.
................................................................................
  **      ...
  */
#ifdef __FAST_MATH__
# error SQLite will not work correctly with the -ffast-math option of GCC.
#endif
  volatile double y = x;
  volatile double z = y;
  rc = (y!=z);
#else  /* if defined(SQLITE_HAVE_ISNAN) */
  rc = isnan(x);
#endif /* SQLITE_HAVE_ISNAN */
  testcase( rc );
  return rc;
}

/*
** Compute a string length that is limited to what can be stored in
** lower 30 bits of a 32-bit signed integer.
**
** The value returned will never be negative.  Nor will it ever be greater
** than the actual length of the string.  For very long strings (greater
** than 1GiB) the value returned might be less than the true string length.
*/
SQLITE_PRIVATE int sqlite3Strlen30(const char *z){
  const char *z2 = z;
  while( *z2 ){ z2++; }
  return 0x3fffffff & (int)(z2 - z);
}



















/*
** Set the most recent error code and error string for the sqlite
** handle "db". The error code is set to "err_code".
**
** If it is not NULL, string zFormat specifies the format of the
** error string in the style of the printf functions: The following
** format characters are allowed:
................................................................................
** Function sqlite3Error() should be used during statement execution
** (sqlite3_step() etc.).
*/
SQLITE_PRIVATE void sqlite3ErrorMsg(Parse *pParse, const char *zFormat, ...){
  va_list ap;
  sqlite3 *db = pParse->db;
  pParse->nErr++;
  testcase( pParse->zErrMsg!=0 );
  sqlite3DbFree(db, pParse->zErrMsg);
  va_start(ap, zFormat);
  pParse->zErrMsg = sqlite3VMPrintf(db, zFormat, ap);
  va_end(ap);
  if( pParse->rc==SQLITE_OK ){
    pParse->rc = SQLITE_ERROR;
  }
................................................................................
}

/*
** Convert an SQL-style quoted string into a normal string by removing
** the quote characters.  The conversion is done in-place.  If the
** input does not begin with a quote character, then this routine
** is a no-op.
**
** The input string must be zero-terminated.  A new zero-terminator
** is added to the dequoted string.
**
** The return value is -1 if no dequoting occurs or the length of the
** dequoted string, exclusive of the zero terminator, if dequoting does
** occur.
**
** 2002-Feb-14: This routine is extended to remove MS-Access style
** brackets from around identifers.  For example:  "[a-b-c]" becomes
** "a-b-c".
*/
SQLITE_PRIVATE int sqlite3Dequote(char *z){
  char quote;
  int i, j;
  if( z==0 ) return -1;
  quote = z[0];
  switch( quote ){
    case '\'':  break;
    case '"':   break;
    case '`':   break;                /* For MySQL compatibility */
    case '[':   quote = ']';  break;  /* For MS SqlServer compatibility */
    default:    return -1;
  }
  for(i=1, j=0; ALWAYS(z[i]); i++){
    if( z[i]==quote ){
      if( z[i+1]==quote ){
        z[j++] = quote;
        i++;
      }else{

        break;
      }
    }else{
      z[j++] = z[i];
    }
  }
  z[j] = 0;
  return j;
}

/* Convenient short-hand */
#define UpperToLower sqlite3UpperToLower

/*
** Some systems have stricmp().  Others have strcasecmp().  Because
................................................................................
  a = (unsigned char *)zLeft;
  b = (unsigned char *)zRight;
  while( N-- > 0 && *a!=0 && UpperToLower[*a]==UpperToLower[*b]){ a++; b++; }
  return N<0 ? 0 : UpperToLower[*a] - UpperToLower[*b];
}

/*
** Return TRUE if z is a pure numeric string.  Return FALSE and leave
** *realnum unchanged if the string contains any character which is not
** part of a number.
**
** If the string is pure numeric, set *realnum to TRUE if the string
** contains the '.' character or an "E+000" style exponentiation suffix.

** Otherwise set *realnum to FALSE.  Note that just becaue *realnum is
** false does not mean that the number can be successfully converted into
** an integer - it might be too big.
**
** An empty string is considered non-numeric.
*/
SQLITE_PRIVATE int sqlite3IsNumber(const char *z, int *realnum, u8 enc){
  int incr = (enc==SQLITE_UTF8?1:2);
  if( enc==SQLITE_UTF16BE ) z++;
  if( *z=='-' || *z=='+' ) z += incr;
  if( !sqlite3Isdigit(*z) ){
    return 0;
  }
  z += incr;
  *realnum = 0;
  while( sqlite3Isdigit(*z) ){ z += incr; }
  if( *z=='.' ){
    z += incr;
    if( !sqlite3Isdigit(*z) ) return 0;
    while( sqlite3Isdigit(*z) ){ z += incr; }
    *realnum = 1;
  }
  if( *z=='e' || *z=='E' ){
    z += incr;
    if( *z=='+' || *z=='-' ) z += incr;
    if( !sqlite3Isdigit(*z) ) return 0;
    while( sqlite3Isdigit(*z) ){ z += incr; }
    *realnum = 1;
  }
  return *z==0;
}

/*
** The string z[] is an ascii representation of a real number.
** Convert this string to a double.
................................................................................
    ** or 9223372036854775808 if negative.  Note that 9223372036854665808
    ** is 2^63. */
    return compare2pow63(zNum)<neg;
  }
}

/*
** The string zNum represents an unsigned integer.  There might be some other
** information following the integer too, but that part is ignored.
** If the integer that the prefix of zNum represents will fit in a
** 64-bit signed integer, return TRUE.  Otherwise return FALSE.
**
** If the negFlag parameter is true, that means that zNum really represents
** a negative number.  (The leading "-" is omitted from zNum.)  This
** parameter is needed to determine a boundary case.  A string
** of "9223373036854775808" returns false if negFlag is false or true
** if negFlag is true.
**
** Leading zeros are ignored.
*/
SQLITE_PRIVATE int sqlite3FitsIn64Bits(const char *zNum, int negFlag){
  int i, c;
  int neg = 0;


  assert( zNum[0]>='0' && zNum[0]<='9' ); /* zNum is an unsigned number */




  if( negFlag ) neg = 1-neg;
  while( *zNum=='0' ){
    zNum++;   /* Skip leading zeros.  Ticket #2454 */
  }
  for(i=0; (c=zNum[i])>='0' && c<='9'; i++){}
  if( i<19 ){
    /* Guaranteed to fit if less than 19 digits */
................................................................................
** A MACRO version, getVarint32, is provided which inlines the 
** single-byte case.  All code should use the MACRO version as 
** this function assumes the single-byte case has already been handled.
*/
SQLITE_PRIVATE u8 sqlite3GetVarint32(const unsigned char *p, u32 *v){
  u32 a,b;

  /* The 1-byte case.  Overwhelmingly the most common.  Handled inline
  ** by the getVarin32() macro */
  a = *p;
  /* a: p0 (unmasked) */
#ifndef getVarint32
  if (!(a&0x80))
  {
    /* Values between 0 and 127 */
    *v = a;
    return 1;
  }
#endif

  /* The 2-byte case */
  p++;
  b = *p;
  /* b: p1 (unmasked) */
  if (!(b&0x80))
  {
    /* Values between 128 and 16383 */
    a &= 0x7f;
    a = a<<7;
    *v = a | b;
    return 2;
  }

  /* The 3-byte case */
  p++;
  a = a<<14;
  a |= *p;
  /* a: p0<<14 | p2 (unmasked) */
  if (!(a&0x80))
  {
    /* Values between 16384 and 2097151 */
    a &= (0x7f<<14)|(0x7f);
    b &= 0x7f;
    b = b<<7;
    *v = a | b;
    return 3;
  }

  /* A 32-bit varint is used to store size information in btrees.
  ** Objects are rarely larger than 2MiB limit of a 3-byte varint.
  ** A 3-byte varint is sufficient, for example, to record the size
  ** of a 1048569-byte BLOB or string.
  **
  ** We only unroll the first 1-, 2-, and 3- byte cases.  The very
  ** rare larger cases can be handled by the slower 64-bit varint
  ** routine.
  */
#if 1
  {
    u64 v64;
    u8 n;

    p -= 2;
    n = sqlite3GetVarint(p, &v64);
    assert( n>3 && n<=9 );
    *v = (u32)v64;
    return n;
  }

#else
  /* For following code (kept for historical record only) shows an
  ** unrolling for the 3- and 4-byte varint cases.  This code is
  ** slightly faster, but it is also larger and much harder to test.
  */
  p++;
  b = b<<14;
  b |= *p;
  /* b: p1<<14 | p3 (unmasked) */
  if (!(b&0x80))
  {
    /* Values between 2097152 and 268435455 */
    b &= (0x7f<<14)|(0x7f);
    a &= (0x7f<<14)|(0x7f);
    a = a<<7;
    *v = a | b;
    return 4;
  }

  p++;
  a = a<<14;
  a |= *p;
  /* a: p0<<28 | p2<<14 | p4 (unmasked) */
  if (!(a&0x80))
  {
    /* Walues  between 268435456 and 34359738367 */
    a &= (0x1f<<28)|(0x7f<<14)|(0x7f);
    b &= (0x1f<<28)|(0x7f<<14)|(0x7f);
    b = b<<7;
    *v = a | b;
    return 5;
  }

................................................................................

    p -= 4;
    n = sqlite3GetVarint(p, &v64);
    assert( n>5 && n<=9 );
    *v = (u32)v64;
    return n;
  }
#endif
}

/*
** Return the number of bytes that will be needed to store the given
** 64-bit integer.
*/
SQLITE_PRIVATE int sqlite3VarintLen(u64 v){
  int i = 0;
  do{
    i++;
    v >>= 7;
  }while( v!=0 && ALWAYS(i<9) );
  return i;
}


/*
** Read or write a four-byte big-endian integer value.
*/
................................................................................
** open properly and is not fit for general use but which can be
** used as an argument to sqlite3_errmsg() or sqlite3_close().
*/
SQLITE_PRIVATE int sqlite3SafetyCheckOk(sqlite3 *db){
  u32 magic;
  if( db==0 ) return 0;
  magic = db->magic;
  if( magic!=SQLITE_MAGIC_OPEN 
#ifdef SQLITE_DEBUG
     && magic!=SQLITE_MAGIC_BUSY
#endif
  ){
    return 0;
  }else{
    return 1;
  }
}
SQLITE_PRIVATE int sqlite3SafetyCheckSickOrOk(sqlite3 *db){
  u32 magic;

  magic = db->magic;
  if( magic!=SQLITE_MAGIC_SICK &&
      magic!=SQLITE_MAGIC_OPEN &&
      magic!=SQLITE_MAGIC_BUSY ) return 0;
  return 1;
}

................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This is the implementation of generic hash-tables
** used in SQLite.
**
** $Id: hash.c,v 1.37 2009/05/02 13:29:38 drh Exp $
*/

/* Turn bulk memory into a hash table object by initializing the
** fields of the Hash structure.
**
** "pNew" is a pointer to the hash table that is to be initialized.


*/
SQLITE_PRIVATE void sqlite3HashInit(Hash *pNew){
  assert( pNew!=0 );

  pNew->first = 0;
  pNew->count = 0;
  pNew->htsize = 0;
  pNew->ht = 0;
}

/* Remove all entries from a hash table.  Reclaim all memory.
................................................................................
  elem = pH->first;
  pH->first = 0;
  sqlite3_free(pH->ht);
  pH->ht = 0;
  pH->htsize = 0;
  while( elem ){
    HashElem *next_elem = elem->next;



    sqlite3_free(elem);
    elem = next_elem;
  }
  pH->count = 0;
}

/*
** The hashing function.
*/
static unsigned int strHash(const char *z, int nKey){

  int h = 0;

  assert( nKey>=0 );
  while( nKey > 0  ){
    h = (h<<3) ^ h ^ sqlite3UpperToLower[(unsigned char)*z++];
    nKey--;
  }
  return h;




}


/* Link pNew element into the hash table pH.  If pEntry!=0 then also
** insert pNew into the pEntry hash bucket.
*/
static void insertElement(
  Hash *pH,              /* The complete hash table */
  struct _ht *pEntry,    /* The entry into which pNew is inserted */
  HashElem *pNew         /* The element to be inserted */
){
  HashElem *pHead;       /* First element already in pEntry */
  if( pEntry ){
    pHead = pEntry->count ? pEntry->chain : 0;
    pEntry->count++;
    pEntry->chain = pNew;
  }else{
    pHead = 0;
  }
  if( pHead ){
    pNew->next = pHead;
    pNew->prev = pHead->prev;
    if( pHead->prev ){ pHead->prev->next = pNew; }
    else             { pH->first = pNew; }
    pHead->prev = pNew;
  }else{
    pNew->next = pH->first;
    if( pH->first ){ pH->first->prev = pNew; }
    pNew->prev = 0;
    pH->first = pNew;
  }


}


/* Resize the hash table so that it cantains "new_size" buckets.
**
** The hash table might fail to resize if sqlite3_malloc() fails or
** if the new size is the same as the prior size.
** Return TRUE if the resize occurs and false if not.
*/
static int rehash(Hash *pH, unsigned int new_size){
  struct _ht *new_ht;            /* The new hash table */
  HashElem *elem, *next_elem;    /* For looping over existing elements */

#if SQLITE_MALLOC_SOFT_LIMIT>0
  if( new_size*sizeof(struct _ht)>SQLITE_MALLOC_SOFT_LIMIT ){
    new_size = SQLITE_MALLOC_SOFT_LIMIT/sizeof(struct _ht);
  }
  if( new_size==pH->htsize ) return 0;
#endif

  /* The inability to allocates space for a larger hash table is
  ** a performance hit but it is not a fatal error.  So mark the
  ** allocation as a benign.

  */
  sqlite3BeginBenignMalloc();
  new_ht = (struct _ht *)sqlite3Malloc( new_size*sizeof(struct _ht) );
  sqlite3EndBenignMalloc();

  if( new_ht==0 ) return 0;
  sqlite3_free(pH->ht);
  pH->ht = new_ht;
  pH->htsize = new_size = sqlite3MallocSize(new_ht)/sizeof(struct _ht);
  memset(new_ht, 0, new_size*sizeof(struct _ht));
  for(elem=pH->first, pH->first=0; elem; elem = next_elem){
    unsigned int h = strHash(elem->pKey, elem->nKey) % new_size;
    next_elem = elem->next;
    insertElement(pH, &new_ht[h], elem);
  }
  return 1;
}

/* This function (for internal use only) locates an element in an
** hash table that matches the given key.  The hash for this key has
** already been computed and is passed as the 4th parameter.
*/
static HashElem *findElementGivenHash(
  const Hash *pH,     /* The pH to be searched */
  const char *pKey,   /* The key we are searching for */
  int nKey,           /* Bytes in key (not counting zero terminator) */
  unsigned int h      /* The hash for this key. */
){
  HashElem *elem;                /* Used to loop thru the element list */
  int count;                     /* Number of elements left to test */

  if( pH->ht ){
    struct _ht *pEntry = &pH->ht[h];
    elem = pEntry->chain;
    count = pEntry->count;
  }else{
    elem = pH->first;
    count = pH->count;
  }
  while( count-- && ALWAYS(elem) ){

    if( elem->nKey==nKey && sqlite3StrNICmp(elem->pKey,pKey,nKey)==0 ){ 
      return elem;
    }
    elem = elem->next;

  }
  return 0;
}

/* Remove a single entry from the hash table given a pointer to that
** element and a hash on the element's key.
*/
static void removeElementGivenHash(
  Hash *pH,         /* The pH containing "elem" */
  HashElem* elem,   /* The element to be removed from the pH */
  unsigned int h    /* Hash value for the element */
){
  struct _ht *pEntry;
  if( elem->prev ){
    elem->prev->next = elem->next; 
  }else{
    pH->first = elem->next;
  }
  if( elem->next ){
    elem->next->prev = elem->prev;
  }
  if( pH->ht ){
    pEntry = &pH->ht[h];
    if( pEntry->chain==elem ){
      pEntry->chain = elem->next;
    }
    pEntry->count--;
    assert( pEntry->count>=0 );




  }
  sqlite3_free( elem );
  pH->count--;
  if( pH->count<=0 ){
    assert( pH->first==0 );
    assert( pH->count==0 );
    sqlite3HashClear(pH);
  }
}
















/* Attempt to locate an element of the hash table pH with a key
** that matches pKey,nKey.  Return the data for this element if it is
** found, or NULL if there is no match.
*/
SQLITE_PRIVATE void *sqlite3HashFind(const Hash *pH, const char *pKey, int nKey){
  HashElem *elem;    /* The element that matches key */
  unsigned int h;    /* A hash on key */

  assert( pH!=0 );
  assert( pKey!=0 );
  assert( nKey>=0 );
  if( pH->ht ){
    h = strHash(pKey, nKey) % pH->htsize;
  }else{
    h = 0;
  }
  elem = findElementGivenHash(pH, pKey, nKey, h);
  return elem ? elem->data : 0;
}

/* Insert an element into the hash table pH.  The key is pKey,nKey
** and the data is "data".
**
** If no element exists with a matching key, then a new

** element is created and NULL is returned.
**
** If another element already exists with the same key, then the
** new data replaces the old data and the old data is returned.
** The key is not copied in this instance.  If a malloc fails, then
** the new data is returned and the hash table is unchanged.
**
** If the "data" parameter to this function is NULL, then the
** element corresponding to "key" is removed from the hash table.
*/
SQLITE_PRIVATE void *sqlite3HashInsert(Hash *pH, const char *pKey, int nKey, void *data){

  unsigned int h;       /* the hash of the key modulo hash table size */
  HashElem *elem;       /* Used to loop thru the element list */
  HashElem *new_elem;   /* New element added to the pH */

  assert( pH!=0 );
  assert( pKey!=0 );
  assert( nKey>=0 );
  if( pH->htsize ){
    h = strHash(pKey, nKey) % pH->htsize;
  }else{
    h = 0;
  }
  elem = findElementGivenHash(pH,pKey,nKey,h);
  if( elem ){
    void *old_data = elem->data;
    if( data==0 ){
      removeElementGivenHash(pH,elem,h);
    }else{
      elem->data = data;

      elem->pKey = pKey;

      assert(nKey==elem->nKey);
    }
    return old_data;

  }
  if( data==0 ) return 0;
  new_elem = (HashElem*)sqlite3Malloc( sizeof(HashElem) );
  if( new_elem==0 ) return data;








  new_elem->pKey = pKey;

  new_elem->nKey = nKey;
  new_elem->data = data;
  pH->count++;
  if( pH->count>=10 && pH->count > 2*pH->htsize ){
    if( rehash(pH, pH->count*2) && pH->htsize ){
      h = strHash(pKey, nKey) % pH->htsize;





    }


  }




  if( pH->ht ){

    insertElement(pH, &pH->ht[h], new_elem);

  }else{
    insertElement(pH, 0, new_elem);
  }
  return 0;
}

/************** End of hash.c ************************************************/
/************** Begin file opcodes.c *****************************************/
/* Automatically generated.  Do not edit */
/* See the mkopcodec.awk script for details. */
................................................................................
     /*   5 */ "Seek",
     /*   6 */ "Sequence",
     /*   7 */ "Savepoint",
     /*   8 */ "RowKey",
     /*   9 */ "SCopy",
     /*  10 */ "OpenWrite",
     /*  11 */ "If",
     /*  12 */ "CollSeq",
     /*  13 */ "OpenRead",
     /*  14 */ "Expire",
     /*  15 */ "AutoCommit",
     /*  16 */ "Pagecount",
     /*  17 */ "IntegrityCk",
     /*  18 */ "Sort",
     /*  19 */ "Not",
     /*  20 */ "Copy",
     /*  21 */ "Trace",
     /*  22 */ "Function",
     /*  23 */ "IfNeg",
     /*  24 */ "Noop",
     /*  25 */ "Return",
     /*  26 */ "NewRowid",
     /*  27 */ "Variable",
     /*  28 */ "String",
     /*  29 */ "RealAffinity",
     /*  30 */ "VRename",
     /*  31 */ "ParseSchema",
     /*  32 */ "VOpen",
     /*  33 */ "Close",
     /*  34 */ "CreateIndex",
     /*  35 */ "IsUnique",
     /*  36 */ "NotFound",
     /*  37 */ "Int64",
     /*  38 */ "MustBeInt",
     /*  39 */ "Halt",
     /*  40 */ "Rowid",
     /*  41 */ "IdxLT",
     /*  42 */ "AddImm",
     /*  43 */ "Statement",
     /*  44 */ "RowData",
     /*  45 */ "MemMax",
     /*  46 */ "NotExists",
     /*  47 */ "Gosub",
     /*  48 */ "Integer",
     /*  49 */ "Prev",
     /*  50 */ "RowSetRead",
     /*  51 */ "RowSetAdd",
     /*  52 */ "VColumn",
     /*  53 */ "CreateTable",
     /*  54 */ "Last",
     /*  55 */ "SeekLe",
     /*  56 */ "IncrVacuum",
     /*  57 */ "IdxRowid",
     /*  58 */ "ResetCount",
     /*  59 */ "ContextPush",
     /*  60 */ "Yield",
     /*  61 */ "DropTrigger",
     /*  62 */ "DropIndex",
     /*  63 */ "IdxGE",
     /*  64 */ "IdxDelete",
     /*  65 */ "Vacuum",
     /*  66 */ "Or",
     /*  67 */ "And",
     /*  68 */ "IfNot",
     /*  69 */ "DropTable",
     /*  70 */ "SeekLt",
     /*  71 */ "IsNull",
     /*  72 */ "NotNull",
     /*  73 */ "Ne",
     /*  74 */ "Eq",
     /*  75 */ "Gt",
     /*  76 */ "Le",
     /*  77 */ "Lt",
     /*  78 */ "Ge",
     /*  79 */ "MakeRecord",
     /*  80 */ "BitAnd",
     /*  81 */ "BitOr",
     /*  82 */ "ShiftLeft",
     /*  83 */ "ShiftRight",
     /*  84 */ "Add",
     /*  85 */ "Subtract",
     /*  86 */ "Multiply",
     /*  87 */ "Divide",
     /*  88 */ "Remainder",
     /*  89 */ "Concat",
     /*  90 */ "ResultRow",
     /*  91 */ "Delete",
     /*  92 */ "AggFinal",
     /*  93 */ "BitNot",
     /*  94 */ "String8",
     /*  95 */ "Compare",
     /*  96 */ "Goto",
     /*  97 */ "TableLock",
     /*  98 */ "Clear",
     /*  99 */ "VerifyCookie",
     /* 100 */ "AggStep",
     /* 101 */ "SetNumColumns",
     /* 102 */ "Transaction",
     /* 103 */ "VFilter",
     /* 104 */ "VDestroy",
     /* 105 */ "ContextPop",
     /* 106 */ "Next",
     /* 107 */ "Count",
     /* 108 */ "IdxInsert",
     /* 109 */ "SeekGe",
     /* 110 */ "Insert",
     /* 111 */ "Destroy",
     /* 112 */ "ReadCookie",
     /* 113 */ "RowSetTest",
     /* 114 */ "LoadAnalysis",
     /* 115 */ "Explain",
     /* 116 */ "HaltIfNull",
     /* 117 */ "OpenPseudo",
     /* 118 */ "OpenEphemeral",
     /* 119 */ "Null",
     /* 120 */ "Move",
................................................................................
**   *  Definitions of sqlite3_io_methods objects for all locking
**      methods plus "finder" functions for each locking method.
**   *  sqlite3_vfs method implementations.
**   *  Locking primitives for the proxy uber-locking-method. (MacOSX only)
**   *  Definitions of sqlite3_vfs objects for all locking methods
**      plus implementations of sqlite3_os_init() and sqlite3_os_end().
**
** $Id: os_unix.c,v 1.250 2009/04/07 05:35:04 chw Exp $
*/
#if SQLITE_OS_UNIX              /* This file is used on unix only */

/*
** There are various methods for file locking used for concurrency
** control:
**
................................................................................
  if( id ){
    unixFile *pFile = (unixFile*)id;
    semUnlock(id, NO_LOCK);
    assert( pFile );
    unixEnterMutex();
    releaseLockInfo(pFile->pLock);
    releaseOpenCnt(pFile->pOpen);

    unixLeaveMutex();
    closeUnixFile(id);
  }
  return SQLITE_OK;
}

#endif /* OS_VXWORKS */
/*
** Named semaphore locking is only available on VxWorks.
................................................................................
  dotlockIoMethods,         /* sqlite3_io_methods object name */
  dotlockClose,             /* xClose method */
  dotlockLock,              /* xLock method */
  dotlockUnlock,            /* xUnlock method */
  dotlockCheckReservedLock  /* xCheckReservedLock method */
)

#if SQLITE_ENABLE_LOCKING_STYLE && !OS_VXWORKS
IOMETHODS(
  flockIoFinder,            /* Finder function name */
  flockIoMethods,           /* sqlite3_io_methods object name */
  flockClose,               /* xClose method */
  flockLock,                /* xLock method */
  flockUnlock,              /* xUnlock method */
  flockCheckReservedLock    /* xCheckReservedLock method */
................................................................................
  }
}
static const sqlite3_io_methods *(*const autolockIoFinder)(const char*,int)
        = autolockIoFinderImpl;

#endif /* defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE */

#if OS_VXWORKS && SQLITE_ENABLE_LOCKING_STYLE
/* 
** This "finder" function attempts to determine the best locking strategy 
** for the database file "filePath".  It then returns the sqlite3_io_methods
** object that implements that strategy.
**
** This is for VXWorks only.
*/
static const sqlite3_io_methods *autolockIoFinderImpl(
  const char *filePath,    /* name of the database file */
  int fd                   /* file descriptor open on the database file */
){
  struct flock lockInfo;

  if( !filePath ){
    /* If filePath==NULL that means we are dealing with a transient file
    ** that does not need to be locked. */
    return &nolockIoMethods;
  }

  /* Test if fcntl() is supported and use POSIX style locks.
  ** Otherwise fall back to the named semaphore method.
  */
  lockInfo.l_len = 1;
  lockInfo.l_start = 0;
  lockInfo.l_whence = SEEK_SET;
  lockInfo.l_type = F_RDLCK;
  if( fcntl(fd, F_GETLK, &lockInfo)!=-1 ) {
    return &posixIoMethods;
  }else{
    return &semIoMethods;
  }
}
static const sqlite3_io_methods *(*const autolockIoFinder)(const char*,int)
        = autolockIoFinderImpl;

#endif /* OS_VXWORKS && SQLITE_ENABLE_LOCKING_STYLE */

/*
** An abstract type for a pointer to a IO method finder function:
*/
typedef const sqlite3_io_methods *(*finder_type)(const char*,int);


/****************************************************************************
................................................................................
static int unixOpen(
  sqlite3_vfs *pVfs,           /* The VFS for which this is the xOpen method */
  const char *zPath,           /* Pathname of file to be opened */
  sqlite3_file *pFile,         /* The file descriptor to be filled in */
  int flags,                   /* Input flags to control the opening */
  int *pOutFlags               /* Output flags returned to SQLite core */
){
  int fd = -1;                    /* File descriptor returned by open() */
  int dirfd = -1;                /* Directory file descriptor */
  int openFlags = 0;             /* Flags to pass to open() */
  int eType = flags&0xFFFFFF00;  /* Type of file to open */
  int noLock;                    /* True to omit locking primitives */
  int rc = SQLITE_OK;

  int isExclusive  = (flags & SQLITE_OPEN_EXCLUSIVE);
................................................................................

#ifndef NDEBUG
  if( (flags & SQLITE_OPEN_MAIN_DB)!=0 ){
    ((unixFile*)pFile)->isLockable = 1;
  }
#endif

  assert( fd>=0 );
  if( isOpenDirectory ){
    rc = openDirectory(zPath, &dirfd);
    if( rc!=SQLITE_OK ){
      close(fd); /* silently leak if fail, already in error */
      return rc;
    }
  }
................................................................................
  ** All default VFSes for unix are contained in the following array.
  **
  ** Note that the sqlite3_vfs.pNext field of the VFS object is modified
  ** by the SQLite core when the VFS is registered.  So the following
  ** array cannot be const.
  */
  static sqlite3_vfs aVfs[] = {
#if SQLITE_ENABLE_LOCKING_STYLE && (OS_VXWORKS || defined(__APPLE__))
    UNIXVFS("unix",          autolockIoFinder ),
#else
    UNIXVFS("unix",          posixIoFinder ),
#endif
    UNIXVFS("unix-none",     nolockIoFinder ),
    UNIXVFS("unix-dotfile",  dotlockIoFinder ),
#if OS_VXWORKS
    UNIXVFS("unix-namedsem", semIoFinder ),
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
    UNIXVFS("unix-posix",    posixIoFinder ),
#if !OS_VXWORKS
    UNIXVFS("unix-flock",    flockIoFinder ),
#endif
#endif
#if SQLITE_ENABLE_LOCKING_STYLE && defined(__APPLE__)
    UNIXVFS("unix-afp",      afpIoFinder ),
    UNIXVFS("unix-proxy",    proxyIoFinder ),
#endif
  };
  unsigned int i;          /* Loop counter */
................................................................................
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains code that is specific to windows.
**
** $Id: os_win.c,v 1.156 2009/04/23 19:08:33 shane Exp $
*/
#if SQLITE_OS_WIN               /* This file is used for windows only */


/*
** A Note About Memory Allocation:
**
................................................................................
  }

  if( flags & SQLITE_OPEN_READWRITE ){
    dwDesiredAccess = GENERIC_READ | GENERIC_WRITE;
  }else{
    dwDesiredAccess = GENERIC_READ;
  }
  /* SQLITE_OPEN_EXCLUSIVE is used to make sure that a new file is 
  ** created. SQLite doesn't use it to indicate "exclusive access" 
  ** as it is usually understood.
  */
  assert(!(flags & SQLITE_OPEN_EXCLUSIVE) || (flags & SQLITE_OPEN_CREATE));
  if( flags & SQLITE_OPEN_EXCLUSIVE ){
    /* Creates a new file, only if it does not already exist. */
    /* If the file exists, it fails. */
    dwCreationDisposition = CREATE_NEW;
  }else if( flags & SQLITE_OPEN_CREATE ){
    /* Open existing file, or create if it doesn't exist */
    dwCreationDisposition = OPEN_ALWAYS;
  }else{
    /* Opens a file, only if it exists. */
    dwCreationDisposition = OPEN_EXISTING;
  }

  dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;



  if( flags & SQLITE_OPEN_DELETEONCLOSE ){
#if SQLITE_OS_WINCE
    dwFlagsAndAttributes = FILE_ATTRIBUTE_HIDDEN;
    isTemp = 1;
#else
    dwFlagsAndAttributes = FILE_ATTRIBUTE_TEMPORARY
                               | FILE_ATTRIBUTE_HIDDEN
................................................................................
static int getSectorSize(
    sqlite3_vfs *pVfs,
    const char *zRelative     /* UTF-8 file name */
){
  DWORD bytesPerSector = SQLITE_DEFAULT_SECTOR_SIZE;
  char zFullpath[MAX_PATH+1];
  int rc;
  DWORD dwRet = 0, dwDummy;

  /*
  ** We need to get the full path name of the file
  ** to get the drive letter to look up the sector
  ** size.
  */
  rc = winFullPathname(pVfs, zRelative, MAX_PATH, zFullpath);
  if( rc == SQLITE_OK )
  {
    void *zConverted = convertUtf8Filename(zFullpath);
    if( zConverted ){
      if( isNT() ){

        /* trim path to just drive reference */
        WCHAR *p = zConverted;

        for(;*p;p++){
          if( *p == '\\' ){

            *p = '\0';
            break;
          }
        }
        dwRet = GetDiskFreeSpaceW((WCHAR*)zConverted,

                                  &dwDummy,
                                  &bytesPerSector,

                                  &dwDummy,
                                  &dwDummy);
#if SQLITE_OS_WINCE==0
      }else{

        /* trim path to just drive reference */
        CHAR *p = (CHAR *)zConverted;

        for(;*p;p++){
          if( *p == '\\' ){

            *p = '\0';
            break;
          }
        }
        dwRet = GetDiskFreeSpaceA((CHAR*)zConverted,

                                  &dwDummy,
                                  &bytesPerSector,

                                  &dwDummy,
                                  &dwDummy);
#endif
      }
      free(zConverted);
    }
    if( !dwRet ){
      bytesPerSector = SQLITE_DEFAULT_SECTOR_SIZE;
    }
................................................................................
** Clear operations are exceedingly rare.  There are usually between
** 5 and 500 set operations per Bitvec object, though the number of sets can
** sometimes grow into tens of thousands or larger.  The size of the
** Bitvec object is the number of pages in the database file at the
** start of a transaction, and is thus usually less than a few thousand,
** but can be as large as 2 billion for a really big database.
**
** @(#) $Id: bitvec.c,v 1.14 2009/04/01 23:49:04 drh Exp $
*/

/* Size of the Bitvec structure in bytes. */
#define BITVEC_SZ        512

/* Round the union size down to the nearest pointer boundary, since that's how 
** it will be aligned within the Bitvec struct. */
................................................................................
** values between 1 and iDivisor.  apSub[1] holds values between
** iDivisor+1 and 2*iDivisor.  apSub[N] holds values between
** N*iDivisor+1 and (N+1)*iDivisor.  Each subbitmap is normalized
** to hold deal with values between 1 and iDivisor.
*/
struct Bitvec {
  u32 iSize;      /* Maximum bit index.  Max iSize is 4,294,967,296. */
  u32 nSet;       /* Number of bits that are set - only valid for aHash
                  ** element.  Max is BITVEC_NINT.  For BITVEC_SZ of 512,
                  ** this would be 125. */
  u32 iDivisor;   /* Number of bits handled by each apSub[] entry. */
                  /* Should >=0 for apSub element. */
                  /* Max iDivisor is max(u32) / BITVEC_NPTR + 1.  */
                  /* For a BITVEC_SZ of 512, this would be 34,359,739. */
  union {
    BITVEC_TELEM aBitmap[BITVEC_NELEM];    /* Bitmap representation */
    u32 aHash[BITVEC_NINT];      /* Hash table representation */
................................................................................

  /* Test to make sure the linear array exactly matches the
  ** Bitvec object.  Start with the assumption that they do
  ** match (rc==0).  Change rc to non-zero if a discrepancy
  ** is found.
  */
  rc = sqlite3BitvecTest(0,0) + sqlite3BitvecTest(pBitvec, sz+1)
          + sqlite3BitvecTest(pBitvec, 0)
          + (sqlite3BitvecSize(pBitvec) - sz);
  for(i=1; i<=sz; i++){
    if(  (TESTBIT(pV,i))!=sqlite3BitvecTest(pBitvec,i) ){
      rc = i;
      break;
    }
  }

................................................................................
**
** This file implements the default page cache implementation (the
** sqlite3_pcache interface). It also contains part of the implementation
** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features.
** If the default page cache implementation is overriden, then neither of
** these two features are available.
**
** @(#) $Id: pcache1.c,v 1.11 2009/04/14 18:44:39 aswift Exp $
*/


typedef struct PCache1 PCache1;
typedef struct PgHdr1 PgHdr1;
typedef struct PgFreeslot PgFreeslot;

................................................................................

  if( pCache->nPage>=pCache->nHash && pcache1ResizeHash(pCache) ){
    goto fetch_out;
  }

  /* Step 4. Try to recycle a page buffer if appropriate. */
  if( pCache->bPurgeable && pcache1.pLruTail && (
     (pCache->nPage+1>=pCache->nMax) || pcache1.nCurrentPage>=pcache1.nMaxPage
  )){
    pPage = pcache1.pLruTail;
    pcache1RemoveFromHash(pPage);
    pcache1PinPage(pPage);
    if( pPage->pCache->szPage!=pCache->szPage ){
      pcache1FreePage(pPage);
      pPage = 0;
................................................................................
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This module implements an object we call a "RowSet".
**
** The RowSet object is a collection of rowids.  Rowids
** are inserted into the RowSet in an arbitrary order.  Inserts
** can be intermixed with tests to see if a given rowid has been
** previously inserted into the RowSet.

**
** After all inserts are finished, it is possible to extract the
** elements of the RowSet in sorted order.  Once this extraction
** process has started, no new elements may be inserted.

**
** Hence, the primitive operations for a RowSet are:
**
**    CREATE
**    INSERT
**    TEST
**    SMALLEST
**    DESTROY
**
** The CREATE and DESTROY primitives are the constructor and destructor,
** obviously.  The INSERT primitive adds a new element to the RowSet.
** TEST checks to see if an element is already in the RowSet.  SMALLEST
** extracts the least value from the RowSet.
**
** The INSERT primitive might allocate additional memory.  Memory is
** allocated in chunks so most INSERTs do no allocation.  There is an 
** upper bound on the size of allocated memory.  No memory is freed
** until DESTROY.
**
** The TEST primitive includes a "batch" number.  The TEST primitive
** will only see elements that were inserted before the last change
** in the batch number.  In other words, if an INSERT occurs between
** two TESTs where the TESTs have the same batch nubmer, then the
** value added by the INSERT will not be visible to the second TEST.
** The initial batch number is zero, so if the very first TEST contains
** a non-zero batch number, it will see all prior INSERTs.
**
** No INSERTs may occurs after a SMALLEST.  An assertion will fail if
** that is attempted.
**
** The cost of an INSERT is roughly constant.  (Sometime new memory
** has to be allocated on an INSERT.)  The cost of a TEST with a new
** batch number is O(NlogN) where N is the number of elements in the RowSet.
** The cost of a TEST using the same batch number is O(logN).  The cost
** of the first SMALLEST is O(NlogN).  Second and subsequent SMALLEST
** primitives are constant time.  The cost of DESTROY is O(N).
**
** There is an added cost of O(N) when switching between TEST and
** SMALLEST primitives.
**
** $Id: rowset.c,v 1.6 2009/04/22 15:32:59 drh Exp $
*/


/*
** Target size for allocation chunks.
*/
#define ROWSET_ALLOCATION_SIZE 1024

/*
** The number of rowset entries per allocation chunk.
*/
#define ROWSET_ENTRY_PER_CHUNK  \
                       ((ROWSET_ALLOCATION_SIZE-8)/sizeof(struct RowSetEntry))

/*
** Each entry in a RowSet is an instance of the following object.

*/
struct RowSetEntry {            
  i64 v;                        /* ROWID value for this entry */
  struct RowSetEntry *pRight;   /* Right subtree (larger entries) or list */
  struct RowSetEntry *pLeft;    /* Left subtree (smaller entries) */
};

/*
** RowSetEntry objects are allocated in large chunks (instances of the
** following structure) to reduce memory allocation overhead.  The
** chunks are kept on a linked list so that they can be deallocated
** when the RowSet is destroyed.
*/
struct RowSetChunk {
  struct RowSetChunk *pNextChunk;        /* Next chunk on list of them all */
  struct RowSetEntry aEntry[ROWSET_ENTRY_PER_CHUNK]; /* Allocated entries */
};

/*
** A RowSet in an instance of the following structure.
**
** A typedef of this structure if found in sqliteInt.h.
*/
struct RowSet {
  struct RowSetChunk *pChunk;    /* List of all chunk allocations */
  sqlite3 *db;                   /* The database connection */
  struct RowSetEntry *pEntry;    /* List of entries using pRight */
  struct RowSetEntry *pLast;     /* Last entry on the pEntry list */
  struct RowSetEntry *pFresh;    /* Source of new entry objects */
  struct RowSetEntry *pTree;     /* Binary tree of entries */
  u16 nFresh;                    /* Number of objects on pFresh */
  u8 isSorted;                   /* True if pEntry is sorted */
  u8 iBatch;                     /* Current insert batch */
};

/*
** Turn bulk memory into a RowSet object.  N bytes of memory
** are available at pSpace.  The db pointer is used as a memory context
** for any subsequent allocations that need to occur.
** Return a pointer to the new RowSet object.
................................................................................
  RowSet *p;
  assert( N >= sizeof(*p) );
  p = pSpace;
  p->pChunk = 0;
  p->db = db;
  p->pEntry = 0;
  p->pLast = 0;
  p->pTree = 0;
  p->pFresh = (struct RowSetEntry*)&p[1];
  p->nFresh = (u16)((N - sizeof(*p))/sizeof(struct RowSetEntry));
  p->isSorted = 1;
  p->iBatch = 0;
  return p;
}

/*
** Deallocate all chunks from a RowSet.  This frees all memory that
** the RowSet has allocated over its lifetime.  This routine is
** the destructor for the RowSet.
*/
SQLITE_PRIVATE void sqlite3RowSetClear(RowSet *p){
  struct RowSetChunk *pChunk, *pNextChunk;
  for(pChunk=p->pChunk; pChunk; pChunk = pNextChunk){
    pNextChunk = pChunk->pNextChunk;
    sqlite3DbFree(p->db, pChunk);
  }
  p->pChunk = 0;
  p->nFresh = 0;
  p->pEntry = 0;
  p->pLast = 0;
  p->pTree = 0;
  p->isSorted = 1;
}

/*
** Insert a new value into a RowSet.
**
** The mallocFailed flag of the database connection is set if a
** memory allocation fails.
*/
SQLITE_PRIVATE void sqlite3RowSetInsert(RowSet *p, i64 rowid){
  struct RowSetEntry *pEntry;  /* The new entry */
  struct RowSetEntry *pLast;   /* The last prior entry */
  assert( p!=0 );
  if( p->nFresh==0 ){
    struct RowSetChunk *pNew;
    pNew = sqlite3DbMallocRaw(p->db, sizeof(*pNew));
    if( pNew==0 ){
      return;
    }
    pNew->pNextChunk = p->pChunk;
    p->pChunk = pNew;
    p->pFresh = pNew->aEntry;
    p->nFresh = ROWSET_ENTRY_PER_CHUNK;
  }
  pEntry = p->pFresh++;
  p->nFresh--;
  pEntry->v = rowid;
  pEntry->pRight = 0;
  pLast = p->pLast;
  if( pLast ){
    if( p->isSorted && rowid<=pLast->v ){
      p->isSorted = 0;
    }
    pLast->pRight = pEntry;
  }else{
    assert( p->pEntry==0 ); /* Fires if INSERT after SMALLEST */
    p->pEntry = pEntry;
  }
  p->pLast = pEntry;
}

/*
** Merge two lists of RowSetEntry objects.  Remove duplicates.
**
** The input lists are connected via pRight pointers and are 
** assumed to each already be in sorted order.
*/
static struct RowSetEntry *rowSetMerge(
  struct RowSetEntry *pA,    /* First sorted list to be merged */
  struct RowSetEntry *pB     /* Second sorted list to be merged */
){
  struct RowSetEntry head;
  struct RowSetEntry *pTail;

  pTail = &head;
  while( pA && pB ){
    assert( pA->pRight==0 || pA->v<=pA->pRight->v );
    assert( pB->pRight==0 || pB->v<=pB->pRight->v );
    if( pA->v<pB->v ){
      pTail->pRight = pA;
      pA = pA->pRight;
      pTail = pTail->pRight;
    }else if( pB->v<pA->v ){
      pTail->pRight = pB;
      pB = pB->pRight;
      pTail = pTail->pRight;
    }else{
      pA = pA->pRight;
    }
  }
  if( pA ){
    assert( pA->pRight==0 || pA->v<=pA->pRight->v );
    pTail->pRight = pA;
  }else{
    assert( pB==0 || pB->pRight==0 || pB->v<=pB->pRight->v );
    pTail->pRight = pB;
  }
  return head.pRight;
}

/*
** Sort all elements on the pEntry list of the RowSet into ascending order.
*/ 
static void rowSetSort(RowSet *p){
  unsigned int i;
  struct RowSetEntry *pEntry;
  struct RowSetEntry *aBucket[40];

  assert( p->isSorted==0 );
  memset(aBucket, 0, sizeof(aBucket));
  while( p->pEntry ){
    pEntry = p->pEntry;
    p->pEntry = pEntry->pRight;
    pEntry->pRight = 0;
    for(i=0; aBucket[i]; i++){
      pEntry = rowSetMerge(aBucket[i], pEntry);
      aBucket[i] = 0;
    }
    aBucket[i] = pEntry;
  }
  pEntry = 0;
  for(i=0; i<sizeof(aBucket)/sizeof(aBucket[0]); i++){
    pEntry = rowSetMerge(pEntry, aBucket[i]);
  }
  p->pEntry = pEntry;
  p->pLast = 0;
  p->isSorted = 1;
}


/*
** The input, pIn, is a binary tree (or subtree) of RowSetEntry objects.
** Convert this tree into a linked list connected by the pRight pointers
** and return pointers to the first and last elements of the new list.
*/
static void rowSetTreeToList(
  struct RowSetEntry *pIn,         /* Root of the input tree */
  struct RowSetEntry **ppFirst,    /* Write head of the output list here */
  struct RowSetEntry **ppLast      /* Write tail of the output list here */
){
  assert( pIn!=0 );
  if( pIn->pLeft ){
    struct RowSetEntry *p;
    rowSetTreeToList(pIn->pLeft, ppFirst, &p);
    p->pRight = pIn;
  }else{
    *ppFirst = pIn;
  }
  if( pIn->pRight ){
    rowSetTreeToList(pIn->pRight, &pIn->pRight, ppLast);
  }else{
    *ppLast = pIn;
  }
  assert( (*ppLast)->pRight==0 );
}


/*
** Convert a sorted list of elements (connected by pRight) into a binary
** tree with depth of iDepth.  A depth of 1 means the tree contains a single
** node taken from the head of *ppList.  A depth of 2 means a tree with
** three nodes.  And so forth.
**
** Use as many entries from the input list as required and update the
** *ppList to point to the unused elements of the list.  If the input
** list contains too few elements, then construct an incomplete tree
** and leave *ppList set to NULL.
**
** Return a pointer to the root of the constructed binary tree.
*/
static struct RowSetEntry *rowSetNDeepTree(
  struct RowSetEntry **ppList,
  int iDepth
){
  struct RowSetEntry *p;         /* Root of the new tree */
  struct RowSetEntry *pLeft;     /* Left subtree */
  if( *ppList==0 ){
    return 0;
  }
  if( iDepth==1 ){
    p = *ppList;
    *ppList = p->pRight;
    p->pLeft = p->pRight = 0;
    return p;
  }
  pLeft = rowSetNDeepTree(ppList, iDepth-1);
  p = *ppList;
  if( p==0 ){
    return pLeft;
  }
  p->pLeft = pLeft;
  *ppList = p->pRight;
  p->pRight = rowSetNDeepTree(ppList, iDepth-1);
  return p;
}

/*
** Convert a sorted list of elements into a binary tree. Make the tree
** as deep as it needs to be in order to contain the entire list.
*/
static struct RowSetEntry *rowSetListToTree(struct RowSetEntry *pList){
  int iDepth;           /* Depth of the tree so far */
  struct RowSetEntry *p;       /* Current tree root */
  struct RowSetEntry *pLeft;   /* Left subtree */

  assert( pList!=0 );
  p = pList;
  pList = p->pRight;
  p->pLeft = p->pRight = 0;
  for(iDepth=1; pList; iDepth++){
    pLeft = p;
    p = pList;
    pList = p->pRight;
    p->pLeft = pLeft;
    p->pRight = rowSetNDeepTree(&pList, iDepth);
  }
  return p;
}

/*
** Convert the list in p->pEntry into a sorted list if it is not
** sorted already.  If there is a binary tree on p->pTree, then
** convert it into a list too and merge it into the p->pEntry list.
*/
static void rowSetToList(RowSet *p){
  if( !p->isSorted ){
    rowSetSort(p);
  }
  if( p->pTree ){
    struct RowSetEntry *pHead, *pTail;
    rowSetTreeToList(p->pTree, &pHead, &pTail);
    p->pTree = 0;
    p->pEntry = rowSetMerge(p->pEntry, pHead);
  }
}

/*
** Extract the smallest element from the RowSet.
** Write the element into *pRowid.  Return 1 on success.  Return
** 0 if the RowSet is already empty.
**
** After this routine has been called, the sqlite3RowSetInsert()
** routine may not be called again.  
*/
SQLITE_PRIVATE int sqlite3RowSetNext(RowSet *p, i64 *pRowid){



  rowSetToList(p);
  if( p->pEntry ){
    *pRowid = p->pEntry->v;
    p->pEntry = p->pEntry->pRight;
    if( p->pEntry==0 ){
      sqlite3RowSetClear(p);
    }
    return 1;
  }else{
    return 0;
  }
}

/*
** Check to see if element iRowid was inserted into the the rowset as
** part of any insert batch prior to iBatch.  Return 1 or 0.
*/
SQLITE_PRIVATE int sqlite3RowSetTest(RowSet *pRowSet, u8 iBatch, sqlite3_int64 iRowid){
  struct RowSetEntry *p;
  if( iBatch!=pRowSet->iBatch ){
    if( pRowSet->pEntry ){
      rowSetToList(pRowSet);
      pRowSet->pTree = rowSetListToTree(pRowSet->pEntry);
      pRowSet->pEntry = 0;
      pRowSet->pLast = 0;
    }
    pRowSet->iBatch = iBatch;
  }
  p = pRowSet->pTree;
  while( p ){
    if( p->v<iRowid ){
      p = p->pRight;
    }else if( p->v>iRowid ){
      p = p->pLeft;
    }else{
      return 1;
    }
  }
  return 0;
}

/************** End of rowset.c **********************************************/
/************** Begin file pager.c *******************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.585 2009/04/30 16:41:00 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO

/*
** Macros for troubleshooting.  Normally turned off
*/
#if 0
................................................................................
**   This variable is set and cleared by sqlite3PagerWrite().
**
** needSync
**
**   TODO: It might be easier to set this variable in writeJournalHdr()
**   and writeMasterJournal() only. Change its meaning to "unsynced data
**   has been written to the journal".
**
** subjInMemory
**
**   This is a boolean variable. If true, then any required sub-journal
**   is opened as an in-memory journal file. If false, then in-memory
**   sub-journals are only used for in-memory pager files.
*/
struct Pager {
  sqlite3_vfs *pVfs;          /* OS functions to use for IO */
  u8 exclusiveMode;           /* Boolean. True if locking_mode==EXCLUSIVE */
  u8 journalMode;             /* On of the PAGER_JOURNALMODE_* values */
  u8 useJournal;              /* Use a rollback journal on this file */
  u8 noReadlock;              /* Do not bother to obtain readlocks */
................................................................................
  u8 dbModified;              /* True if there are any changes to the Db */
  u8 needSync;                /* True if an fsync() is needed on the journal */
  u8 journalStarted;          /* True if header of journal is synced */
  u8 changeCountDone;         /* Set after incrementing the change-counter */
  u8 setMaster;               /* True if a m-j name has been written to jrnl */
  u8 doNotSync;               /* Boolean. While true, do not spill the cache */
  u8 dbSizeValid;             /* Set when dbSize is correct */
  u8 subjInMemory;            /* True to use in-memory sub-journals */
  Pgno dbSize;                /* Number of pages in the database */
  Pgno dbOrigSize;            /* dbSize before the current transaction */
  Pgno dbFileSize;            /* Number of pages in the database file */
  int errCode;                /* One of several kinds of errors */
  int nRec;                   /* Pages journalled since last j-header written */
  u32 cksumInit;              /* Quasi-random value added to every checksum */
  u32 nSubRec;                /* Number of records written to sub-journal */
................................................................................
**
** TODO: Why can we not reset the pager while in error state?
*/
static void pager_reset(Pager *pPager){
  if( SQLITE_OK==pPager->errCode ){
    sqlite3BackupRestart(pPager->pBackup);
    sqlite3PcacheClear(pPager->pPCache);
    pPager->dbSizeValid = 0;
  }
}

/*
** Free all structures in the Pager.aSavepoint[] array and set both
** Pager.aSavepoint and Pager.nSavepoint to zero. Close the sub-journal
** if it is open and the pager is not in exclusive mode.
*/
static void releaseAllSavepoints(Pager *pPager){
  int ii;               /* Iterator for looping through Pager.aSavepoint */
  for(ii=0; ii<pPager->nSavepoint; ii++){
    sqlite3BitvecDestroy(pPager->aSavepoint[ii].pInSavepoint);
  }
  if( !pPager->exclusiveMode || sqlite3IsMemJournal(pPager->sjfd) ){
    sqlite3OsClose(pPager->sjfd);
  }
  sqlite3_free(pPager->aSavepoint);
  pPager->aSavepoint = 0;
  pPager->nSavepoint = 0;
  pPager->nSubRec = 0;
}
................................................................................
    if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ){
      int isMemoryJournal = sqlite3IsMemJournal(pPager->jfd);
      sqlite3OsClose(pPager->jfd);
      if( !isMemoryJournal ){
        rc = sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
      }
    }else if( pPager->journalMode==PAGER_JOURNALMODE_TRUNCATE ){
      if( pPager->journalOff==0 ){
        rc = SQLITE_OK;
      }else{
        rc = sqlite3OsTruncate(pPager->jfd, 0);
      }
      pPager->journalOff = 0;
      pPager->journalStarted = 0;
    }else if( pPager->exclusiveMode 
     || pPager->journalMode==PAGER_JOURNALMODE_PERSIST
    ){
      rc = zeroJournalHdr(pPager, hasMaster);
      pager_error(pPager, rc);
................................................................................
      rc = pager_playback_one_page(pPager,1,isUnsync,&pPager->journalOff,0,0);
      if( rc!=SQLITE_OK ){
        if( rc==SQLITE_DONE ){
          rc = SQLITE_OK;
          pPager->journalOff = szJ;
          break;
        }else{
          /* If we are unable to rollback, quit and return the error
          ** code.  This will cause the pager to enter the error state
          ** so that no further harm will be done.  Perhaps the next
          ** process to come along will be able to rollback the database.
          */

          goto end_playback;
        }
      }
    }
  }
  /*NOTREACHED*/
  assert( 0 );
................................................................................
  ** is the maximum space required for an in-memory journal file handle 
  ** and a regular journal file-handle. Note that a "regular journal-handle"
  ** may be a wrapper capable of caching the first portion of the journal
  ** file in memory to implement the atomic-write optimization (see 
  ** source file journal.c).
  */
  if( sqlite3JournalSize(pVfs)>sqlite3MemJournalSize() ){
    journalFileSize = ROUND8(sqlite3JournalSize(pVfs));
  }else{
    journalFileSize = ROUND8(sqlite3MemJournalSize());
  }

  /* Set the output variable to NULL in case an error occurs. */
  *ppPager = 0;

  /* Compute and store the full pathname in an allocated buffer pointed
  ** to by zPathname, length nPathname. Or, if this is a temporary file,
................................................................................
  **     Database file handle            (pVfs->szOsFile bytes)
  **     Sub-journal file handle         (journalFileSize bytes)
  **     Main journal file handle        (journalFileSize bytes)
  **     Database file name              (nPathname+1 bytes)
  **     Journal file name               (nPathname+8+1 bytes)
  */
  pPtr = (u8 *)sqlite3MallocZero(
    ROUND8(sizeof(*pPager)) +      /* Pager structure */
    ROUND8(pcacheSize) +           /* PCache object */
    ROUND8(pVfs->szOsFile) +       /* The main db file */
    journalFileSize * 2 +          /* The two journal files */ 
    nPathname + 1 +                /* zFilename */
    nPathname + 8 + 1              /* zJournal */
  );
  assert( EIGHT_BYTE_ALIGNMENT(journalFileSize) );
  if( !pPtr ){
    sqlite3_free(zPathname);
    return SQLITE_NOMEM;
  }
  pPager =              (Pager*)(pPtr);
  pPager->pPCache =    (PCache*)(pPtr += ROUND8(sizeof(*pPager)));
  pPager->fd =   (sqlite3_file*)(pPtr += ROUND8(pcacheSize));
  pPager->sjfd = (sqlite3_file*)(pPtr += ROUND8(pVfs->szOsFile));
  pPager->jfd =  (sqlite3_file*)(pPtr += journalFileSize);
  pPager->zFilename =    (char*)(pPtr += journalFileSize);
  assert( EIGHT_BYTE_ALIGNMENT(pPager->jfd) );

  /* Fill in the Pager.zFilename and Pager.zJournal buffers, if required. */
  if( zPathname ){
    pPager->zJournal =   (char*)(pPtr += nPathname + 1);
    memcpy(pPager->zFilename, zPathname, nPathname);
    memcpy(pPager->zJournal, zPathname, nPathname);
    memcpy(&pPager->zJournal[nPathname], "-journal", 8);
................................................................................
  }
  return rc;
}

/*
** If the reference count has reached zero, rollback any active
** transaction and unlock the pager.
**
** Except, in locking_mode=EXCLUSIVE when there is nothing to in
** the rollback journal, the unlock is not performed and there is
** nothing to rollback, so this routine is a no-op.
*/ 
static void pagerUnlockIfUnused(Pager *pPager){
  if( (sqlite3PcacheRefCount(pPager->pPCache)==0)
   && (!pPager->exclusiveMode || pPager->journalOff>0) 
  ){
    pagerUnlockAndRollback(pPager);
  }
}

/*
** Drop a page from the cache using sqlite3PcacheDrop().
**
................................................................................
** SQLITE_OK is returned if everything goes according to plan. 
** An SQLITE_IOERR_XXX error code is returned if a call to 
** sqlite3OsOpen() fails.
*/
static int openSubJournal(Pager *pPager){
  int rc = SQLITE_OK;
  if( isOpen(pPager->jfd) && !isOpen(pPager->sjfd) ){
    if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY || pPager->subjInMemory ){
      sqlite3MemJournalOpen(pPager->sjfd);
    }else{
      rc = pagerOpentemp(pPager, pPager->sjfd, SQLITE_OPEN_SUBJOURNAL);
    }
  }
  return rc;
}
................................................................................
** If this is not a temporary or in-memory file and, the journal file is 
** opened if it has not been already. For a temporary file, the opening 
** of the journal file is deferred until there is an actual need to 
** write to the journal. TODO: Why handle temporary files differently?
**
** If the journal file is opened (or if it is already open), then a
** journal-header is written to the start of it.
**
** If the subjInMemory argument is non-zero, then any sub-journal opened
** within this transaction will be opened as an in-memory file. This
** has no effect if the sub-journal is already opened (as it may be when
** running in exclusive mode) or if the transaction does not require a
** sub-journal. If the subjInMemory argument is zero, then any required
** sub-journal is implemented in-memory if pPager is an in-memory database, 
** or using a temporary file otherwise.
*/
SQLITE_PRIVATE int sqlite3PagerBegin(Pager *pPager, int exFlag, int subjInMemory){
  int rc = SQLITE_OK;
  assert( pPager->state!=PAGER_UNLOCK );
  pPager->subjInMemory = subjInMemory;
  if( pPager->state==PAGER_SHARED ){
    assert( pPager->pInJournal==0 );
    assert( !MEMDB && !pPager->tempFile );

    /* Obtain a RESERVED lock on the database file. If the exFlag parameter
    ** is true, then immediately upgrade this to an EXCLUSIVE lock. The
    ** busy-handler callback can be used when upgrading to the EXCLUSIVE
................................................................................
    ** written to the transaction journal or the ckeckpoint journal
    ** or both.
    **
    ** First check to see that the transaction journal exists and
    ** create it if it does not.
    */
    assert( pPager->state!=PAGER_UNLOCK );
    rc = sqlite3PagerBegin(pPager, 0, pPager->subjInMemory);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    assert( pPager->state>=PAGER_RESERVED );
    if( !isOpen(pPager->jfd) && pPager->useJournal
          && pPager->journalMode!=PAGER_JOURNALMODE_OFF ){
      rc = pager_open_journal(pPager);
................................................................................
  ** for the page moved there.
  */
  pPg->flags &= ~PGHDR_NEED_SYNC;
  pPgOld = pager_lookup(pPager, pgno);
  assert( !pPgOld || pPgOld->nRef==1 );
  if( pPgOld ){
    pPg->flags |= (pPgOld->flags&PGHDR_NEED_SYNC);
    sqlite3PcacheDrop(pPgOld);
  }

  origPgno = pPg->pgno;
  sqlite3PcacheMove(pPg, pgno);




  sqlite3PcacheMakeDirty(pPg);
  pPager->dbModified = 1;

  if( needSyncPgno ){
    /* If needSyncPgno is non-zero, then the journal file needs to be 
    ** sync()ed before any data is written to database file page needSyncPgno.
    ** Currently, no such page exists in the page-cache and the 
................................................................................
**    PAGER_JOURNALMODE_QUERY
**    PAGER_JOURNALMODE_DELETE
**    PAGER_JOURNALMODE_TRUNCATE
**    PAGER_JOURNALMODE_PERSIST
**    PAGER_JOURNALMODE_OFF
**    PAGER_JOURNALMODE_MEMORY
**
** If the parameter is not _QUERY, then the journal_mode is set to the
** value specified if the change is allowed.  The change is disallowed
** for the following reasons:
**
**   *  An in-memory database can only have its journal_mode set to _OFF
**      or _MEMORY.
**
**   *  The journal mode may not be changed while a transaction is active.
**
** The returned indicate the current (possibly updated) journal-mode.
*/
SQLITE_PRIVATE int sqlite3PagerJournalMode(Pager *pPager, int eMode){

  assert( eMode==PAGER_JOURNALMODE_QUERY
            || eMode==PAGER_JOURNALMODE_DELETE
            || eMode==PAGER_JOURNALMODE_TRUNCATE
            || eMode==PAGER_JOURNALMODE_PERSIST
            || eMode==PAGER_JOURNALMODE_OFF 
            || eMode==PAGER_JOURNALMODE_MEMORY );
  assert( PAGER_JOURNALMODE_QUERY<0 );
  if( eMode>=0


   && (!MEMDB || eMode==PAGER_JOURNALMODE_MEMORY 
              || eMode==PAGER_JOURNALMODE_OFF)
   && !pPager->dbModified
   && (!isOpen(pPager->jfd) || 0==pPager->journalOff)
  ){
    if( isOpen(pPager->jfd) ){
      sqlite3OsClose(pPager->jfd);
    }
    pPager->journalMode = (u8)eMode;
  }
  return (int)pPager->journalMode;
}

/*
** Get/set the size-limit used for persistent journal files.
**
** Setting the size limit to -1 means no limit is enforced.
** An attempt to set a limit smaller than -1 is a no-op.
*/
SQLITE_PRIVATE i64 sqlite3PagerJournalSizeLimit(Pager *pPager, i64 iLimit){
  if( iLimit>=-1 ){
    pPager->journalSizeLimit = iLimit;
  }
  return pPager->journalSizeLimit;
}
................................................................................
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** $Id: btmutex.c,v 1.15 2009/04/10 12:55:17 danielk1977 Exp $
**
** This file contains code used to implement mutexes on Btree objects.
** This code really belongs in btree.c.  But btree.c is getting too
** big and we want to break it down some.  This packaged seemed like
** a good breakout.
*/
/************** Include btreeInt.h in the middle of btmutex.c ****************/
................................................................................
SQLITE_PRIVATE int sqlite3BtreeRestoreCursorPosition(BtCursor *pCur);
SQLITE_PRIVATE void sqlite3BtreeGetTempCursor(BtCursor *pCur, BtCursor *pTempCur);
SQLITE_PRIVATE void sqlite3BtreeReleaseTempCursor(BtCursor *pCur);
SQLITE_PRIVATE void sqlite3BtreeMoveToParent(BtCursor *pCur);

/************** End of btreeInt.h ********************************************/
/************** Continuing where we left off in btmutex.c ********************/
#ifndef SQLITE_OMIT_SHARED_CACHE
#if SQLITE_THREADSAFE

/*
** Obtain the BtShared mutex associated with B-Tree handle p. Also,
** set BtShared.db to the database handle associated with p and the
** p->locked boolean to true.
*/
static void lockBtreeMutex(Btree *p){
  assert( p->locked==0 );
  assert( sqlite3_mutex_notheld(p->pBt->mutex) );
  assert( sqlite3_mutex_held(p->db->mutex) );

  sqlite3_mutex_enter(p->pBt->mutex);
  p->pBt->db = p->db;
  p->locked = 1;
}

/*
** Release the BtShared mutex associated with B-Tree handle p and
** clear the p->locked boolean.
*/
static void unlockBtreeMutex(Btree *p){
  assert( p->locked==1 );
  assert( sqlite3_mutex_held(p->pBt->mutex) );
  assert( sqlite3_mutex_held(p->db->mutex) );
  assert( p->db==p->pBt->db );

  sqlite3_mutex_leave(p->pBt->mutex);
  p->locked = 0;
}

/*
** Enter a mutex on the given BTree object.
**
** If the object is not sharable, then no mutex is ever required
** and this routine is a no-op.  The underlying mutex is non-recursive.
** But we keep a reference count in Btree.wantToLock so the behavior
................................................................................
  /* Check for locking consistency */
  assert( !p->locked || p->wantToLock>0 );
  assert( p->sharable || p->wantToLock==0 );

  /* We should already hold a lock on the database connection */
  assert( sqlite3_mutex_held(p->db->mutex) );

  /* Unless the database is sharable and unlocked, then BtShared.db
  ** should already be set correctly. */
  assert( (p->locked==0 && p->sharable) || p->pBt->db==p->db );

  if( !p->sharable ) return;
  p->wantToLock++;
  if( p->locked ) return;

  /* In most cases, we should be able to acquire the lock we
  ** want without having to go throught the ascending lock
  ** procedure that follows.  Just be sure not to block.
  */
  if( sqlite3_mutex_try(p->pBt->mutex)==SQLITE_OK ){
    p->pBt->db = p->db;
    p->locked = 1;
    return;
  }

  /* To avoid deadlock, first release all locks with a larger
  ** BtShared address.  Then acquire our lock.  Then reacquire
  ** the other BtShared locks that we used to hold in ascending
................................................................................
  ** order.
  */
  for(pLater=p->pNext; pLater; pLater=pLater->pNext){
    assert( pLater->sharable );
    assert( pLater->pNext==0 || pLater->pNext->pBt>pLater->pBt );
    assert( !pLater->locked || pLater->wantToLock>0 );
    if( pLater->locked ){
      unlockBtreeMutex(pLater);

    }
  }


  lockBtreeMutex(p);
  for(pLater=p->pNext; pLater; pLater=pLater->pNext){
    if( pLater->wantToLock ){


      lockBtreeMutex(pLater);
    }
  }
}

/*
** Exit the recursive mutex on a Btree.
*/
SQLITE_PRIVATE void sqlite3BtreeLeave(Btree *p){
  if( p->sharable ){
    assert( p->wantToLock>0 );
    p->wantToLock--;
    if( p->wantToLock==0 ){
      unlockBtreeMutex(p);


    }
  }
}

#ifndef NDEBUG
/*
** Return true if the BtShared mutex is held on the btree, or if the
** B-Tree is not marked as sharable.


**
** This routine is used only from within assert() statements.
*/
SQLITE_PRIVATE int sqlite3BtreeHoldsMutex(Btree *p){
  assert( p->sharable==0 || p->locked==0 || p->wantToLock>0 );
  assert( p->sharable==0 || p->locked==0 || p->db==p->pBt->db );
  assert( p->sharable==0 || p->locked==0 || sqlite3_mutex_held(p->pBt->mutex) );
  assert( p->sharable==0 || p->locked==0 || sqlite3_mutex_held(p->db->mutex) );

  return (p->sharable==0 || p->locked);
}
#endif


#ifndef SQLITE_OMIT_INCRBLOB
/*
** Enter and leave a mutex on a Btree given a cursor owned by that
................................................................................
*/
SQLITE_PRIVATE void sqlite3BtreeEnterAll(sqlite3 *db){
  int i;
  Btree *p, *pLater;
  assert( sqlite3_mutex_held(db->mutex) );
  for(i=0; i<db->nDb; i++){
    p = db->aDb[i].pBt;
    assert( !p || (p->locked==0 && p->sharable) || p->pBt->db==p->db );
    if( p && p->sharable ){
      p->wantToLock++;
      if( !p->locked ){
        assert( p->wantToLock==1 );
        while( p->pPrev ) p = p->pPrev;
        while( p->locked && p->pNext ) p = p->pNext;
        for(pLater = p->pNext; pLater; pLater=pLater->pNext){
          if( pLater->locked ){
            unlockBtreeMutex(pLater);

          }
        }
        while( p ){
          lockBtreeMutex(p);

          p = p->pNext;
        }
      }
    }
  }
}
SQLITE_PRIVATE void sqlite3BtreeLeaveAll(sqlite3 *db){
................................................................................
  assert( sqlite3_mutex_held(db->mutex) );
  for(i=0; i<db->nDb; i++){
    p = db->aDb[i].pBt;
    if( p && p->sharable ){
      assert( p->wantToLock>0 );
      p->wantToLock--;
      if( p->wantToLock==0 ){
        unlockBtreeMutex(p);


      }
    }
  }
}

#ifndef NDEBUG
/*
................................................................................
    assert( !p->locked || p->wantToLock>0 );

    /* We should already hold a lock on the database connection */
    assert( sqlite3_mutex_held(p->db->mutex) );

    p->wantToLock++;
    if( !p->locked && p->sharable ){
      lockBtreeMutex(p);

    }
  }
}

/*
** Leave the mutex of every btree in the group.
*/
................................................................................
    assert( p->wantToLock>0 );

    /* We should already hold a lock on the database connection */
    assert( sqlite3_mutex_held(p->db->mutex) );

    p->wantToLock--;
    if( p->wantToLock==0 && p->locked ){
      unlockBtreeMutex(p);

    }
  }
}

#else
SQLITE_PRIVATE void sqlite3BtreeEnter(Btree *p){
  p->pBt->db = p->db;
}
SQLITE_PRIVATE void sqlite3BtreeEnterAll(sqlite3 *db){
  int i;
  for(i=0; i<db->nDb; i++){
    Btree *p = db->aDb[i].pBt;
    if( p ){
      p->pBt->db = p->db;
    }
  }
}
#endif /* if SQLITE_THREADSAFE */
#endif /* ifndef SQLITE_OMIT_SHARED_CACHE */

/************** End of btmutex.c *********************************************/
/************** Begin file btree.c *******************************************/
/*
** 2004 April 6
**
** The author disclaims copyright to this source code.  In place of
................................................................................
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.607 2009/05/04 19:01:26 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
** Including a description of file format and an overview of operation.
*/

/*
................................................................................
  BtShared *pBt = p->pBt;
  BtLock *pIter;

  assert( sqlite3BtreeHoldsMutex(p) );
  assert( eLock==READ_LOCK || eLock==WRITE_LOCK );
  assert( p->db!=0 );
  
  /* If requesting a write-lock, then the Btree must have an open write
  ** transaction on this file. And, obviously, for this to be so there 
  ** must be an open write transaction on the file itself.
  */
  assert( eLock==READ_LOCK || (p==pBt->pWriter && p->inTrans==TRANS_WRITE) );
  assert( eLock==READ_LOCK || pBt->inTransaction==TRANS_WRITE );
  
  /* This is a no-op if the shared-cache is not enabled */
  if( !p->sharable ){
    return SQLITE_OK;
  }

  /* If some other connection is holding an exclusive lock, the
  ** requested lock may not be obtained.
................................................................................
  */
  if( 
    0==(p->db->flags&SQLITE_ReadUncommitted) || 
    eLock==WRITE_LOCK ||
    iTab==MASTER_ROOT
  ){
    for(pIter=pBt->pLock; pIter; pIter=pIter->pNext){
      /* The condition (pIter->eLock!=eLock) in the following if(...) 
      ** statement is a simplification of:
      **
      **   (eLock==WRITE_LOCK || pIter->eLock==WRITE_LOCK)
      **
      ** since we know that if eLock==WRITE_LOCK, then no other connection
      ** may hold a WRITE_LOCK on any table in this file (since there can
      ** only be a single writer).
      */
      assert( pIter->eLock==READ_LOCK || pIter->eLock==WRITE_LOCK );
      assert( eLock==READ_LOCK || pIter->pBtree==p || pIter->eLock==READ_LOCK);
      if( pIter->pBtree!=p && pIter->iTable==iTab && pIter->eLock!=eLock ){

        sqlite3ConnectionBlocked(p->db, pIter->pBtree->db);
        if( eLock==WRITE_LOCK ){
          assert( p==pBt->pWriter );
          pBt->isPending = 1;
        }
        return SQLITE_LOCKED_SHAREDCACHE;
      }
................................................................................
}
#endif /* !SQLITE_OMIT_SHARED_CACHE */

#ifndef SQLITE_OMIT_SHARED_CACHE
/*
** Release all the table locks (locks obtained via calls to
** the setSharedCacheTableLock() procedure) held by Btree handle p.
**
** This function assumes that handle p has an open read or write 
** transaction. If it does not, then the BtShared.isPending variable
** may be incorrectly cleared.
*/
static void clearAllSharedCacheTableLocks(Btree *p){
  BtShared *pBt = p->pBt;
  BtLock **ppIter = &pBt->pLock;

  assert( sqlite3BtreeHoldsMutex(p) );
  assert( p->sharable || 0==*ppIter );
  assert( p->inTrans>0 );

  while( *ppIter ){
    BtLock *pLock = *ppIter;
    assert( pBt->isExclusive==0 || pBt->pWriter==pLock->pBtree );
    assert( pLock->pBtree->inTrans>=pLock->eLock );
    if( pLock->pBtree==p ){
      *ppIter = pLock->pNext;
      sqlite3_free(pLock);
    }else{
      ppIter = &pLock->pNext;
    }
  }
................................................................................

/*
** Compute the total number of bytes that a Cell needs in the cell
** data area of the btree-page.  The return number includes the cell
** data header and the local payload, but not any overflow page or
** the space used by the cell pointer.
*/

static u16 cellSizePtr(MemPage *pPage, u8 *pCell){


  u8 *pIter = &pCell[pPage->childPtrSize];
  u32 nSize;

#ifdef SQLITE_DEBUG
  /* The value returned by this function should always be the same as
  ** the (CellInfo.nSize) value found by doing a full parse of the
  ** cell. If SQLITE_DEBUG is defined, an assert() at the bottom of
  ** this function verifies that this invariant is not violated. */
  CellInfo debuginfo;
  sqlite3BtreeParseCellPtr(pPage, pCell, &debuginfo);
#endif

  if( pPage->intKey ){
    u8 *pEnd;
    if( pPage->hasData ){
      pIter += getVarint32(pIter, nSize);
    }else{
      nSize = 0;
    }

    /* pIter now points at the 64-bit integer key value, a variable length 
    ** integer. The following block moves pIter to point at the first byte
    ** past the end of the key value. */
    pEnd = &pIter[9];
    while( (*pIter++)&0x80 && pIter<pEnd );
  }else{
    pIter += getVarint32(pIter, nSize);
  }

  if( nSize>pPage->maxLocal ){
    int minLocal = pPage->minLocal;
    nSize = minLocal + (nSize - minLocal) % (pPage->pBt->usableSize - 4);
    if( nSize>pPage->maxLocal ){
      nSize = minLocal;
    }
    nSize += 4;
  }
  nSize += (pIter - pCell);

  /* The minimum size of any cell is 4 bytes. */
  if( nSize<4 ){
    nSize = 4;
  }

  assert( nSize==debuginfo.nSize );
  return nSize;
}
#ifndef NDEBUG
static u16 cellSize(MemPage *pPage, int iCell){
  return cellSizePtr(pPage, findCell(pPage, iCell));
}
#endif

#ifndef SQLITE_OMIT_AUTOVACUUM
/*
** If the cell pCell, part of page pPage contains a pointer
** to an overflow page, insert an entry into the pointer-map
** for the overflow page.
*/
................................................................................
  if( cbrk-addr!=pPage->nFree ){
    return SQLITE_CORRUPT_BKPT;
  }
  return SQLITE_OK;
}

/*
** Allocate nByte bytes of space from within the B-Tree page passed
** as the first argument. Return the index into pPage->aData[] of the 
** first byte of allocated space. 
**

** The caller guarantees that the space between the end of the cell-offset 

** array and the start of the cell-content area is at least nByte bytes
** in size. So this routine can never fail.
**


** If there are already 60 or more bytes of fragments within the page,
** the page is defragmented before returning. If this were not done there
** is a chance that the number of fragmented bytes could eventually 
** overflow the single-byte field of the page-header in which this value
** is stored.
*/
static int allocateSpace(MemPage *pPage, int nByte){



  const int hdr = pPage->hdrOffset;    /* Local cache of pPage->hdrOffset */
  u8 * const data = pPage->aData;      /* Local cache of pPage->aData */
  int nFrag;                           /* Number of fragmented bytes on pPage */
  int top;



  

  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  assert( pPage->pBt );
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( nByte>=0 );  /* Minimum cell size is 4 */
  assert( pPage->nFree>=nByte );
  assert( pPage->nOverflow==0 );


  /* Assert that the space between the cell-offset array and the 
  ** cell-content area is greater than nByte bytes.
  */
  assert( nByte <= (
      get2byte(&data[hdr+5])-(hdr+8+(pPage->leaf?0:4)+2*get2byte(&data[hdr+3]))
  ));

  pPage->nFree -= (u16)nByte;
  nFrag = data[hdr+7];
  if( nFrag>=60 ){
    defragmentPage(pPage);
  }else{
    /* Search the freelist looking for a free slot big enough to satisfy 


    ** the request. The allocation is made from the first free slot in 
    ** the list that is large enough to accomadate it.
    */
    int pc, addr;
    for(addr=hdr+1; (pc = get2byte(&data[addr]))>0; addr=pc){
      int size = get2byte(&data[pc+2]);     /* Size of free slot */
      if( size>=nByte ){
        int x = size - nByte;

        if( x<4 ){
          /* Remove the slot from the free-list. Update the number of
          ** fragmented bytes within the page. */
          memcpy(&data[addr], &data[pc], 2);
          data[hdr+7] = (u8)(nFrag + x);

        }else{
          /* The slot remains on the free-list. Reduce its size to account
          ** for the portion used by the new allocation. */
          put2byte(&data[pc+2], x);
        }
        return pc + x;
      }


    }
  }

  /* Allocate memory from the gap in between the cell pointer array
  ** and the cell content area.
  */
  top = get2byte(&data[hdr+5]) - nByte;








  put2byte(&data[hdr+5], top);

  return top;
}

/*
** Return a section of the pPage->aData to the freelist.
** The first byte of the new free block is pPage->aDisk[start]
** and the size of the block is "size" bytes.
................................................................................
**
** This routine needs to reset the extra data section at the end of the
** page to agree with the restored data.
*/
static void pageReinit(DbPage *pData){
  MemPage *pPage;
  pPage = (MemPage *)sqlite3PagerGetExtra(pData);
  assert( sqlite3PagerPageRefcount(pData)>0 );
  if( pPage->isInit ){
    assert( sqlite3_mutex_held(pPage->pBt->mutex) );
    pPage->isInit = 0;
    if( sqlite3PagerPageRefcount(pData)>1 ){
      /* pPage might not be a btree page;  it might be an overflow page
      ** or ptrmap page or a free page.  In those cases, the following
      ** call to sqlite3BtreeInitPage() will likely return SQLITE_CORRUPT.
      ** But no harm is done by this.  And it is very important that
      ** sqlite3BtreeInitPage() be called on every btree page so we make
      ** the call for every page that comes in for re-initing. */
      sqlite3BtreeInitPage(pPage);
................................................................................
** Open a database file.
** 
** zFilename is the name of the database file.  If zFilename is NULL
** a new database with a random name is created.  This randomly named
** database file will be deleted when sqlite3BtreeClose() is called.
** If zFilename is ":memory:" then an in-memory database is created
** that is automatically destroyed when it is closed.
**
** If the database is already opened in the same database connection
** and we are in shared cache mode, then the open will fail with an
** SQLITE_CONSTRAINT error.  We cannot allow two or more BtShared
** objects in the same database connection since doing so will lead
** to problems with locking.
*/
SQLITE_PRIVATE int sqlite3BtreeOpen(
  const char *zFilename,  /* Name of the file containing the BTree database */
  sqlite3 *db,            /* Associated database handle */
  Btree **ppBtree,        /* Pointer to new Btree object written here */
  int flags,              /* Options */
  int vfsFlags            /* Flags passed through to sqlite3_vfs.xOpen() */
................................................................................
  p->db = db;

#if !defined(SQLITE_OMIT_SHARED_CACHE) && !defined(SQLITE_OMIT_DISKIO)
  /*
  ** If this Btree is a candidate for shared cache, try to find an
  ** existing BtShared object that we can share with
  */


  if( isMemdb==0 && zFilename && zFilename[0] ){

    if( sqlite3GlobalConfig.sharedCacheEnabled ){
      int nFullPathname = pVfs->mxPathname+1;
      char *zFullPathname = sqlite3Malloc(nFullPathname);
      sqlite3_mutex *mutexShared;
      p->sharable = 1;
      db->flags |= SQLITE_SharedCache;
      if( !zFullPathname ){
................................................................................
      sqlite3_mutex_enter(mutexOpen);
      mutexShared = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER);
      sqlite3_mutex_enter(mutexShared);
      for(pBt=GLOBAL(BtShared*,sqlite3SharedCacheList); pBt; pBt=pBt->pNext){
        assert( pBt->nRef>0 );
        if( 0==strcmp(zFullPathname, sqlite3PagerFilename(pBt->pPager))
                 && sqlite3PagerVfs(pBt->pPager)==pVfs ){
          int iDb;
          for(iDb=db->nDb-1; iDb>=0; iDb--){
            Btree *pExisting = db->aDb[iDb].pBt;
            if( pExisting && pExisting->pBt==pBt ){
              sqlite3_mutex_leave(mutexShared);
              sqlite3_mutex_leave(mutexOpen);
              sqlite3_free(zFullPathname);
              sqlite3_free(p);
              return SQLITE_CONSTRAINT;
            }
          }
          p->pBt = pBt;
          pBt->nRef++;
          break;
        }
      }
      sqlite3_mutex_leave(mutexShared);
      sqlite3_free(zFullPathname);
................................................................................
                          EXTRA_SIZE, flags, vfsFlags);
    if( rc==SQLITE_OK ){
      rc = sqlite3PagerReadFileheader(pBt->pPager,sizeof(zDbHeader),zDbHeader);
    }
    if( rc!=SQLITE_OK ){
      goto btree_open_out;
    }
    pBt->db = db;
    sqlite3PagerSetBusyhandler(pBt->pPager, btreeInvokeBusyHandler, pBt);
    p->pBt = pBt;
  
    sqlite3PagerSetReiniter(pBt->pPager, pageReinit);
    pBt->pCursor = 0;
    pBt->pPage1 = 0;
    pBt->readOnly = sqlite3PagerIsreadonly(pBt->pPager);
    pBt->pageSize = get2byte(&zDbHeader[16]);
    if( pBt->pageSize<512 || pBt->pageSize>SQLITE_MAX_PAGE_SIZE
         || ((pBt->pageSize-1)&pBt->pageSize)!=0 ){
      pBt->pageSize = 0;

#ifndef SQLITE_OMIT_AUTOVACUUM
      /* If the magic name ":memory:" will create an in-memory database, then
      ** leave the autoVacuum mode at 0 (do not auto-vacuum), even if
      ** SQLITE_DEFAULT_AUTOVACUUM is true. On the other hand, if
      ** SQLITE_OMIT_MEMORYDB has been defined, then ":memory:" is just a
      ** regular file-name. In this case the auto-vacuum applies as per normal.
      */
................................................................................
      nReserve = zDbHeader[20];
      pBt->pageSizeFixed = 1;
#ifndef SQLITE_OMIT_AUTOVACUUM
      pBt->autoVacuum = (get4byte(&zDbHeader[36 + 4*4])?1:0);
      pBt->incrVacuum = (get4byte(&zDbHeader[36 + 7*4])?1:0);
#endif
    }
    rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize);
    if( rc ) goto btree_open_out;
    pBt->usableSize = pBt->pageSize - nReserve;
    assert( (pBt->pageSize & 7)==0 );  /* 8-byte alignment of pageSize */

   
#if !defined(SQLITE_OMIT_SHARED_CACHE) && !defined(SQLITE_OMIT_DISKIO)
    /* Add the new BtShared object to the linked list sharable BtShareds.
    */
    if( p->sharable ){
      sqlite3_mutex *mutexShared;
      pBt->nRef = 1;
................................................................................
SQLITE_PRIVATE int sqlite3BtreeClose(Btree *p){
  BtShared *pBt = p->pBt;
  BtCursor *pCur;

  /* Close all cursors opened via this handle.  */
  assert( sqlite3_mutex_held(p->db->mutex) );
  sqlite3BtreeEnter(p);

  pCur = pBt->pCursor;
  while( pCur ){
    BtCursor *pTmp = pCur;
    pCur = pCur->pNext;
    if( pTmp->pBtree==p ){
      sqlite3BtreeCloseCursor(pTmp);
    }
................................................................................
  sqlite3BtreeLeave(p);
  return rc;
}

#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) || !defined(SQLITE_OMIT_VACUUM)
/*
** Change the default pages size and the number of reserved bytes per page.
** Or, if the page size has already been fixed, return SQLITE_READONLY 
** without changing anything.
**
** The page size must be a power of 2 between 512 and 65536.  If the page
** size supplied does not meet this constraint then the page size is not
** changed.
**
** Page sizes are constrained to be a power of two so that the region
** of the database file used for locking (beginning at PENDING_BYTE,
** the first byte past the 1GB boundary, 0x40000000) needs to occur
** at the beginning of a page.
**
** If parameter nReserve is less than zero, then the number of reserved
** bytes per page is left unchanged.
**
** If the iFix!=0 then the pageSizeFixed flag is set so that the page size
** and autovacuum mode can no longer be changed.
*/
SQLITE_PRIVATE int sqlite3BtreeSetPageSize(Btree *p, int pageSize, int nReserve, int iFix){
  int rc = SQLITE_OK;
  BtShared *pBt = p->pBt;
  assert( nReserve>=-1 && nReserve<=255 );
  sqlite3BtreeEnter(p);
  if( pBt->pageSizeFixed ){
    sqlite3BtreeLeave(p);
    return SQLITE_READONLY;
................................................................................
    assert( (pageSize & 7)==0 );
    assert( !pBt->pPage1 && !pBt->pCursor );
    pBt->pageSize = (u16)pageSize;
    freeTempSpace(pBt);
    rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize);
  }
  pBt->usableSize = pBt->pageSize - (u16)nReserve;
  if( iFix ) pBt->pageSizeFixed = 1;
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Return the currently defined page size
*/
................................................................................
*/
static int lockBtree(BtShared *pBt){
  int rc;
  MemPage *pPage1;
  int nPage;

  assert( sqlite3_mutex_held(pBt->mutex) );
  assert( pBt->pPage1==0 );
  rc = sqlite3BtreeGetPage(pBt, 1, &pPage1, 0);
  if( rc!=SQLITE_OK ) return rc;

  /* Do some checking to help insure the file we opened really is
  ** a valid database file. 
  */
  rc = sqlite3PagerPagecount(pBt->pPager, &nPage);
................................................................................
      ** zero and return SQLITE_OK. The caller will call this function
      ** again with the correct page-size.
      */
      releasePage(pPage1);
      pBt->usableSize = (u16)usableSize;
      pBt->pageSize = (u16)pageSize;
      freeTempSpace(pBt);
      rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize);
      if( rc ) goto page1_init_failed;
      return SQLITE_OK;
    }
    if( usableSize<500 ){
      goto page1_init_failed;
    }
    pBt->pageSize = (u16)pageSize;
    pBt->usableSize = (u16)usableSize;
................................................................................
** If there is a transaction in progress, this routine is a no-op.
*/
static void unlockBtreeIfUnused(BtShared *pBt){
  assert( sqlite3_mutex_held(pBt->mutex) );
  if( pBt->inTransaction==TRANS_NONE && pBt->pCursor==0 && pBt->pPage1!=0 ){
    if( sqlite3PagerRefcount(pBt->pPager)>=1 ){
      assert( pBt->pPage1->aData );








      releasePage(pBt->pPage1);
    }
    pBt->pPage1 = 0;
  }
}

/*
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeBeginTrans(Btree *p, int wrflag){
  sqlite3 *pBlock = 0;
  BtShared *pBt = p->pBt;
  int rc = SQLITE_OK;

  sqlite3BtreeEnter(p);

  btreeIntegrity(p);

  /* If the btree is already in a write-transaction, or it
  ** is already in a read-transaction and a read-transaction
  ** is requested, this is a no-op.
  */
  if( p->inTrans==TRANS_WRITE || (p->inTrans==TRANS_READ && !wrflag) ){
................................................................................
    sqlite3ConnectionBlocked(p->db, pBlock);
    rc = SQLITE_LOCKED_SHAREDCACHE;
    goto trans_begun;
  }
#endif

  do {
    /* Call lockBtree() until either pBt->pPage1 is populated or
    ** lockBtree() returns something other than SQLITE_OK. lockBtree()
    ** may return SQLITE_OK but leave pBt->pPage1 set to 0 if after
    ** reading page 1 it discovers that the page-size of the database 
    ** file is not pBt->pageSize. In this case lockBtree() will update
    ** pBt->pageSize to the page-size of the file on disk.
    */
    while( pBt->pPage1==0 && SQLITE_OK==(rc = lockBtree(pBt)) );


    if( rc==SQLITE_OK && wrflag ){
      if( pBt->readOnly ){
        rc = SQLITE_READONLY;
      }else{
        rc = sqlite3PagerBegin(pBt->pPager,wrflag>1,sqlite3TempInMemory(p->db));
        if( rc==SQLITE_OK ){
          rc = newDatabase(pBt);
        }
      }
    }
  
    if( rc!=SQLITE_OK ){
................................................................................

set_child_ptrmaps_out:
  pPage->isInit = isInitOrig;
  return rc;
}

/*
** Somewhere on pPage, which is guaranteed to be a btree page, not an overflow
** page, is a pointer to page iFrom. Modify this pointer so that it points to
** iTo. Parameter eType describes the type of pointer to be modified, as 
** follows:
**
** PTRMAP_BTREE:     pPage is a btree-page. The pointer points at a child 
**                   page of pPage.
**
................................................................................
** number of pages the database file will contain after this 
** process is complete.
*/
static int incrVacuumStep(BtShared *pBt, Pgno nFin, Pgno iLastPg){
  Pgno nFreeList;           /* Number of pages still on the free-list */

  assert( sqlite3_mutex_held(pBt->mutex) );
  assert( iLastPg>nFin );

  if( !PTRMAP_ISPAGE(pBt, iLastPg) && iLastPg!=PENDING_BYTE_PAGE(pBt) ){
    int rc;
    u8 eType;
    Pgno iPtrPage;

    nFreeList = get4byte(&pBt->pPage1->aData[36]);
    if( nFreeList==0 ){
      return SQLITE_DONE;
    }

    rc = ptrmapGet(pBt, iLastPg, &eType, &iPtrPage);
    if( rc!=SQLITE_OK ){
      return rc;
    }
................................................................................
** SQLITE_OK is returned. Otherwise an SQLite error code. 
*/
SQLITE_PRIVATE int sqlite3BtreeIncrVacuum(Btree *p){
  int rc;
  BtShared *pBt = p->pBt;

  sqlite3BtreeEnter(p);

  assert( pBt->inTransaction==TRANS_WRITE && p->inTrans==TRANS_WRITE );
  if( !pBt->autoVacuum ){
    rc = SQLITE_DONE;
  }else{
    invalidateAllOverflowCache(pBt);
    rc = incrVacuumStep(pBt, 0, pagerPagecount(pBt));
  }
................................................................................
    Pgno nFin;
    Pgno nFree;
    Pgno nPtrmap;
    Pgno iFree;
    const int pgsz = pBt->pageSize;
    Pgno nOrig = pagerPagecount(pBt);

    if( PTRMAP_ISPAGE(pBt, nOrig) || nOrig==PENDING_BYTE_PAGE(pBt) ){
      /* It is not possible to create a database for which the final page
      ** is either a pointer-map page or the pending-byte page. If one
      ** is encountered, this indicates corruption.
      */
      return SQLITE_CORRUPT_BKPT;
    }



    nFree = get4byte(&pBt->pPage1->aData[36]);
    nPtrmap = (nFree-nOrig+PTRMAP_PAGENO(pBt, nOrig)+pgsz/5)/(pgsz/5);
    nFin = nOrig - nFree - nPtrmap;
    if( nOrig>PENDING_BYTE_PAGE(pBt) && nFin<PENDING_BYTE_PAGE(pBt) ){
      nFin--;
    }
    while( PTRMAP_ISPAGE(pBt, nFin) || nFin==PENDING_BYTE_PAGE(pBt) ){
      nFin--;
    }

    for(iFree=nOrig; iFree>nFin && rc==SQLITE_OK; iFree--){
................................................................................
** and populated with enough information so that if a power loss occurs
** the database can be restored to its original state by playing back
** the journal.  Then the contents of the journal are flushed out to
** the disk.  After the journal is safely on oxide, the changes to the
** database are written into the database file and flushed to oxide.
** At the end of this call, the rollback journal still exists on the
** disk and we are still holding all locks, so the transaction has not
** committed.  See sqlite3BtreeCommitPhaseTwo() for the second phase of the
** commit process.
**
** This call is a no-op if no write-transaction is currently active on pBt.
**
** Otherwise, sync the database file for the btree pBt. zMaster points to
** the name of a master journal file that should be written into the
** individual journal file, or is NULL, indicating no master journal file 
................................................................................
** the write-transaction for this database file is to delete the journal.
*/
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseOne(Btree *p, const char *zMaster){
  int rc = SQLITE_OK;
  if( p->inTrans==TRANS_WRITE ){
    BtShared *pBt = p->pBt;
    sqlite3BtreeEnter(p);

#ifndef SQLITE_OMIT_AUTOVACUUM
    if( pBt->autoVacuum ){
      rc = autoVacuumCommit(pBt);
      if( rc!=SQLITE_OK ){
        sqlite3BtreeLeave(p);
        return rc;
      }
................................................................................
  return rc;
}

/*
** Commit the transaction currently in progress.
**
** This routine implements the second phase of a 2-phase commit.  The
** sqlite3BtreeCommitPhaseOne() routine does the first phase and should
** be invoked prior to calling this routine.  The sqlite3BtreeCommitPhaseOne()
** routine did all the work of writing information out to disk and flushing the
** contents so that they are written onto the disk platter.  All this
** routine has to do is delete or truncate or zero the header in the
** the rollback journal (which causes the transaction to commit) and
** drop locks.
**
** This will release the write lock on the database file.  If there
** are no active cursors, it also releases the read lock.
*/
SQLITE_PRIVATE int sqlite3BtreeCommitPhaseTwo(Btree *p){
  BtShared *pBt = p->pBt;

  sqlite3BtreeEnter(p);

  btreeIntegrity(p);

  /* If the handle has a write-transaction open, commit the shared-btrees 
  ** transaction and set the shared state to TRANS_READ.
  */
  if( p->inTrans==TRANS_WRITE ){
    int rc;
................................................................................
    rc = sqlite3PagerCommitPhaseTwo(pBt->pPager);
    if( rc!=SQLITE_OK ){
      sqlite3BtreeLeave(p);
      return rc;
    }
    pBt->inTransaction = TRANS_READ;
  }


  /* If the handle has any kind of transaction open, decrement the transaction
  ** count of the shared btree. If the transaction count reaches 0, set
  ** the shared state to TRANS_NONE. The unlockBtreeIfUnused() call below
  ** will unlock the pager.
  */
  if( p->inTrans!=TRANS_NONE ){
    clearAllSharedCacheTableLocks(p);
    pBt->nTransaction--;
    if( 0==pBt->nTransaction ){
      pBt->inTransaction = TRANS_NONE;
    }
  }

  /* Set the current transaction state to TRANS_NONE and unlock
  ** the pager if this call closed the only read or write transaction.
  */
  btreeClearHasContent(pBt);
  p->inTrans = TRANS_NONE;
  unlockBtreeIfUnused(pBt);

  btreeIntegrity(p);
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeRollback(Btree *p){
  int rc;
  BtShared *pBt = p->pBt;
  MemPage *pPage1;

  sqlite3BtreeEnter(p);

  rc = saveAllCursors(pBt, 0, 0);
#ifndef SQLITE_OMIT_SHARED_CACHE
  if( rc!=SQLITE_OK ){
    /* This is a horrible situation. An IO or malloc() error occurred whilst
    ** trying to save cursor positions. If this is an automatic rollback (as
    ** the result of a constraint, malloc() failure or IO error) then 
    ** the cache may be internally inconsistent (not contain valid trees) so
................................................................................
    ** we cannot simply return the error to the caller. Instead, abort 
    ** all queries that may be using any of the cursors that failed to save.
    */
    sqlite3BtreeTripAllCursors(p, rc);
  }
#endif
  btreeIntegrity(p);


  if( p->inTrans==TRANS_WRITE ){
    int rc2;

    assert( TRANS_WRITE==pBt->inTransaction );
    rc2 = sqlite3PagerRollback(pBt->pPager);
    if( rc2!=SQLITE_OK ){
................................................................................
      releasePage(pPage1);
    }
    assert( countWriteCursors(pBt)==0 );
    pBt->inTransaction = TRANS_READ;
  }

  if( p->inTrans!=TRANS_NONE ){
    clearAllSharedCacheTableLocks(p);
    assert( pBt->nTransaction>0 );
    pBt->nTransaction--;
    if( 0==pBt->nTransaction ){
      pBt->inTransaction = TRANS_NONE;
    }
  }

................................................................................
** iStatement is 1. This anonymous savepoint can be released or rolled back
** using the sqlite3BtreeSavepoint() function.
*/
SQLITE_PRIVATE int sqlite3BtreeBeginStmt(Btree *p, int iStatement){
  int rc;
  BtShared *pBt = p->pBt;
  sqlite3BtreeEnter(p);

  assert( p->inTrans==TRANS_WRITE );
  assert( pBt->readOnly==0 );
  assert( iStatement>0 );
  assert( iStatement>p->db->nSavepoint );
  if( NEVER(p->inTrans!=TRANS_WRITE || pBt->readOnly) ){
    rc = SQLITE_INTERNAL;
  }else{
................................................................................
SQLITE_PRIVATE int sqlite3BtreeSavepoint(Btree *p, int op, int iSavepoint){
  int rc = SQLITE_OK;
  if( p && p->inTrans==TRANS_WRITE ){
    BtShared *pBt = p->pBt;
    assert( op==SAVEPOINT_RELEASE || op==SAVEPOINT_ROLLBACK );
    assert( iSavepoint>=0 || (iSavepoint==-1 && op==SAVEPOINT_ROLLBACK) );
    sqlite3BtreeEnter(p);

    rc = sqlite3PagerSavepoint(pBt->pPager, op, iSavepoint);
    if( rc==SQLITE_OK ){
      rc = newDatabase(pBt);
    }
    sqlite3BtreeLeave(p);
  }
  return rc;
................................................................................
  int iTable,                                 /* Root page of table to open */
  int wrFlag,                                 /* 1 to write. 0 read-only */
  struct KeyInfo *pKeyInfo,                   /* First arg to xCompare() */
  BtCursor *pCur                              /* Write new cursor here */
){
  int rc;
  sqlite3BtreeEnter(p);

  rc = btreeCursor(p, iTable, wrFlag, pKeyInfo, pCur);
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Return the size of a BtCursor object in bytes.
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeCloseCursor(BtCursor *pCur){
  Btree *pBtree = pCur->pBtree;
  if( pBtree ){
    int i;
    BtShared *pBt = pCur->pBt;
    sqlite3BtreeEnter(pBtree);

    sqlite3BtreeClearCursor(pCur);
    if( pCur->pPrev ){
      pCur->pPrev->pNext = pCur->pNext;
    }else{
      pBt->pCursor = pCur->pNext;
    }
    if( pCur->pNext ){
................................................................................
** or set *pRes to 1 if the table is empty.
*/
SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor *pCur, int *pRes){
  int rc;
 
  assert( cursorHoldsMutex(pCur) );
  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );

  /* If the cursor already points to the last entry, this is a no-op. */
  if( CURSOR_VALID==pCur->eState && pCur->atLast ){
#ifdef SQLITE_DEBUG
    /* This block serves to assert() that the cursor really does point 
    ** to the last entry in the b-tree. */
    int ii;
    for(ii=0; ii<pCur->iPage; ii++){
      assert( pCur->aiIdx[ii]==pCur->apPage[ii]->nCell );
    }
    assert( pCur->aiIdx[pCur->iPage]==pCur->apPage[pCur->iPage]->nCell-1 );
    assert( pCur->apPage[pCur->iPage]->leaf );
#endif
    return SQLITE_OK;
  }

  rc = moveToRoot(pCur);
  if( rc==SQLITE_OK ){
    if( CURSOR_INVALID==pCur->eState ){
      assert( pCur->apPage[pCur->iPage]->nCell==0 );
      *pRes = 1;
    }else{
      assert( pCur->eState==CURSOR_VALID );
      *pRes = 0;
      rc = moveToRightmost(pCur);

      pCur->atLast = rc==SQLITE_OK ?1:0;
    }
  }
  return rc;
}

/* Move the cursor so that it points to an entry near the key 
................................................................................
    }
    if( biasRight ){
      pCur->aiIdx[pCur->iPage] = (u16)upr;
    }else{
      pCur->aiIdx[pCur->iPage] = (u16)((upr+lwr)/2);
    }
    for(;;){


      int idx = pCur->aiIdx[pCur->iPage]; /* Index of current cell in pPage */
      u8 *pCell;                          /* Pointer to current cell in pPage */

      pCur->info.nSize = 0;
      pCell = findCell(pPage, idx) + pPage->childPtrSize;
      if( pPage->intKey ){
        i64 nCellKey;

        if( pPage->hasData ){
          u32 dummy;
          pCell += getVarint32(pCell, dummy);
        }
        getVarint(pCell, (u64*)&nCellKey);
        if( nCellKey==intKey ){
          c = 0;
        }else if( nCellKey<intKey ){
          c = -1;
        }else{
          assert( nCellKey>intKey );
          c = +1;
        }
        pCur->validNKey = 1;
        pCur->info.nKey = nCellKey;
      }else{


        /* The maximum supported page-size is 32768 bytes. This means that
        ** the maximum number of record bytes stored on an index B-Tree
        ** page is at most 8198 bytes, which may be stored as a 2-byte
        ** varint. This information is used to attempt to avoid parsing 
        ** the entire cell by checking for the cases where the record is 
        ** stored entirely within the b-tree page by inspecting the first 
        ** 2 bytes of the cell.
        */
        int nCell = pCell[0];
        if( !(nCell & 0x80) && nCell<=pPage->maxLocal ){
          /* This branch runs if the record-size field of the cell is a
          ** single byte varint and the record fits entirely on the main
          ** b-tree page.  */
          c = sqlite3VdbeRecordCompare(nCell, (void*)&pCell[1], pIdxKey);
        }else if( !(pCell[1] & 0x80) 
          && (nCell = ((nCell&0x7f)<<7) + pCell[1])<=pPage->maxLocal
        ){
          /* The record-size field is a 2 byte varint and the record 
          ** fits entirely on the main b-tree page.  */
          c = sqlite3VdbeRecordCompare(nCell, (void*)&pCell[2], pIdxKey);
        }else{
          /* The record flows over onto one or more overflow pages. In
          ** this case the whole cell needs to be parsed, a buffer allocated
          ** and accessPayload() used to retrieve the record into the
          ** buffer before VdbeRecordCompare() can be called. */
          void *pCellKey;
          u8 * const pCellBody = pCell - pPage->childPtrSize;
          sqlite3BtreeParseCellPtr(pPage, pCellBody, &pCur->info);
          nCell = pCur->info.nKey;
          pCellKey = sqlite3Malloc( nCell );
          if( pCellKey==0 ){
            rc = SQLITE_NOMEM;
            goto moveto_finish;
          }
          rc = accessPayload(pCur, 0, nCell, (unsigned char*)pCellKey, 0, 0);
          c = sqlite3VdbeRecordCompare(nCell, pCellKey, pIdxKey);
          sqlite3_free(pCellKey);
          if( rc ) goto moveto_finish;
        }
      }
      if( c==0 ){

        if( pPage->intKey && !pPage->leaf ){
          lwr = idx;
          upr = lwr - 1;
          break;
        }else{
          *pRes = 0;
          rc = SQLITE_OK;
................................................................................
      }
      if( c<0 ){
        lwr = idx+1;
      }else{
        upr = idx-1;
      }
      if( lwr>upr ){

        break;
      }
      pCur->aiIdx[pCur->iPage] = (u16)((lwr+upr)/2);
    }
    assert( lwr==upr+1 );
    assert( pPage->isInit );
    if( pPage->leaf ){
................................................................................
  const void *pKey,   /* Packed key if the btree is an index */
  i64 nKey,           /* Integer key for tables.  Size of pKey for indices */
  int bias,           /* Bias search to the high end */
  int *pRes           /* Write search results here */
){
  int rc;                    /* Status code */
  UnpackedRecord *pIdxKey;   /* Unpacked index key */
  char aSpace[150];          /* Temp space for pIdxKey - to avoid a malloc */


  if( pKey ){
    assert( nKey==(i64)(int)nKey );
    pIdxKey = sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey,
                                      aSpace, sizeof(aSpace));
    if( pIdxKey==0 ) return SQLITE_NOMEM;
  }else{
................................................................................
  assert( pBt->usableSize > 4 );
  ovflPageSize = pBt->usableSize - 4;
  nOvfl = (info.nPayload - info.nLocal + ovflPageSize - 1)/ovflPageSize;
  assert( ovflPgno==0 || nOvfl>0 );
  while( nOvfl-- ){
    Pgno iNext = 0;
    MemPage *pOvfl = 0;
    if( ovflPgno<2 || ovflPgno>pagerPagecount(pBt) ){
      /* 0 is not a legal page number and page 1 cannot be an 
      ** overflow page. Therefore if ovflPgno<2 or past the end of the 
      ** file the database must be corrupt. */
      return SQLITE_CORRUPT_BKPT;
    }
    if( nOvfl ){
      rc = getOverflowPage(pBt, ovflPgno, &pOvfl, &iNext);
      if( rc ) return rc;
    }
    rc = freePage2(pBt, pOvfl, ovflPgno);
................................................................................
    if( pPage->pBt->autoVacuum ){
      /* The cell may contain a pointer to an overflow page. If so, write
      ** the entry for the overflow page into the pointer map.
      */
      CellInfo info;
      sqlite3BtreeParseCellPtr(pPage, pCell, &info);
      assert( (info.nData+(pPage->intKey?0:info.nKey))==info.nPayload );
      if( info.iOverflow ){
        Pgno pgnoOvfl = get4byte(&pCell[info.iOverflow]);
        rc = ptrmapPut(pPage->pBt, pgnoOvfl, PTRMAP_OVERFLOW1, pPage->pgno);
        if( rc!=SQLITE_OK ) return rc;
      }
    }
#endif
  }
................................................................................
static void assemblePage(
  MemPage *pPage,   /* The page to be assemblied */
  int nCell,        /* The number of cells to add to this page */
  u8 **apCell,      /* Pointers to cell bodies */
  u16 *aSize        /* Sizes of the cells */
){
  int i;            /* Loop counter */
  u8 *pCellptr;     /* Address of next cell pointer */
  int cellbody;     /* Address of next cell body */
  u8 * const data = pPage->aData;             /* Pointer to data for pPage */
  const int hdr = pPage->hdrOffset;           /* Offset of header on pPage */
  const int nUsable = pPage->pBt->usableSize; /* Usable size of page */

  assert( pPage->nOverflow==0 );
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( nCell>=0 && nCell<=MX_CELL(pPage->pBt) && MX_CELL(pPage->pBt)<=5460 );
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );

  /* Check that the page has just been zeroed by zeroPage() */
  assert( pPage->nCell==0 );
  assert( get2byte(&data[hdr+5])==nUsable );

  pCellptr = &data[pPage->cellOffset + nCell*2];
  cellbody = nUsable;
  for(i=nCell-1; i>=0; i--){
    pCellptr -= 2;
    cellbody -= aSize[i];
    put2byte(pCellptr, cellbody);
    memcpy(&data[cellbody], apCell[i], aSize[i]);
  }
  put2byte(&data[hdr+3], nCell);
  put2byte(&data[hdr+5], cellbody);
  pPage->nFree -= (nCell*2 + nUsable - cellbody);







  pPage->nCell = (u16)nCell;
}

/*
** The following parameters determine how many adjacent pages get involved
** in a balancing operation.  NN is the number of neighbors on either side
** of the page that participate in the balancing operation.  NB is the
................................................................................
  apCell = sqlite3ScratchMalloc( szScratch ); 
  if( apCell==0 ){
    rc = SQLITE_NOMEM;
    goto balance_cleanup;
  }
  szCell = (u16*)&apCell[nMaxCells];
  aCopy[0] = (u8*)&szCell[nMaxCells];
  assert( EIGHT_BYTE_ALIGNMENT(aCopy[0]) );
  for(i=1; i<NB; i++){
    aCopy[i] = &aCopy[i-1][pBt->pageSize+ROUND8(sizeof(MemPage))];
    assert( ((aCopy[i] - (u8*)0) & 7)==0 ); /* 8-byte alignment required */
  }
  aSpace1 = &aCopy[NB-1][pBt->pageSize+ROUND8(sizeof(MemPage))];
  assert( EIGHT_BYTE_ALIGNMENT(aSpace1) );
  if( ISAUTOVACUUM ){
    aFrom = &aSpace1[pBt->pageSize];
  }
  aSpace2 = sqlite3PageMalloc(pBt->pageSize);
  if( aSpace2==0 ){
    rc = SQLITE_NOMEM;
    goto balance_cleanup;
................................................................................
** Insert a new record into the BTree.  The key is given by (pKey,nKey)
** and the data is given by (pData,nData).  The cursor is used only to
** define what table the record should be inserted into.  The cursor
** is left pointing at a random location.
**
** For an INTKEY table, only the nKey value of the key is used.  pKey is
** ignored.  For a ZERODATA table, the pData and nData are both ignored.
**
** If the seekResult parameter is non-zero, then a successful call to
** sqlite3BtreeMoveto() to seek cursor pCur to (pKey, nKey) has already
** been performed. seekResult is the search result returned (a negative
** number if pCur points at an entry that is smaller than (pKey, nKey), or
** a positive value if pCur points at an etry that is larger than 
** (pKey, nKey)). 
**
** If the seekResult parameter is 0, then cursor pCur may point to any 
** entry or to no entry at all. In this case this function has to seek
** the cursor before the new key can be inserted.
*/
SQLITE_PRIVATE int sqlite3BtreeInsert(
  BtCursor *pCur,                /* Insert data into the table of this cursor */
  const void *pKey, i64 nKey,    /* The key of the new record */
  const void *pData, int nData,  /* The data of the new record */
  int nZero,                     /* Number of extra 0 bytes to append to data */
  int appendBias,                /* True if this is likely an append */
  int seekResult                 /* Result of prior sqlite3BtreeMoveto() call */
){
  int rc;
  int loc = seekResult;
  int szNew;
  int idx;
  MemPage *pPage;
  Btree *p = pCur->pBtree;
  BtShared *pBt = p->pBt;
  unsigned char *oldCell;
  unsigned char *newCell = 0;
................................................................................
    assert( rc==SQLITE_LOCKED_SHAREDCACHE );
    return rc;
  }
  if( pCur->eState==CURSOR_FAULT ){
    return pCur->skip;
  }

  /* Save the positions of any other cursors open on this table.

  **
  ** In some cases, the call to sqlite3BtreeMoveto() below is a no-op. For
  ** example, when inserting data into a table with auto-generated integer
  ** keys, the VDBE layer invokes sqlite3BtreeLast() to figure out the 
  ** integer key to use. It then calls this function to actually insert the 
  ** data into the intkey B-Tree. In this case sqlite3BtreeMoveto() recognizes
  ** that the cursor is already where it needs to be and returns without
  ** doing any work. To avoid thwarting these optimizations, it is important
  ** not to clear the cursor here.
  */
  if(
    SQLITE_OK!=(rc = saveAllCursors(pBt, pCur->pgnoRoot, pCur)) || (!loc &&
    SQLITE_OK!=(rc = sqlite3BtreeMoveto(pCur, pKey, nKey, appendBias, &loc))
  )){
    return rc;
  }

  pPage = pCur->apPage[pCur->iPage];
  assert( pPage->intKey || nKey>=0 );
  assert( pPage->leaf || !pPage->intKey );
  TRACE(("INSERT: table=%d nkey=%lld ndata=%d page=%d %s\n",
................................................................................
    idx = ++pCur->aiIdx[pCur->iPage];
    pCur->info.nSize = 0;
    pCur->validNKey = 0;
  }else{
    assert( pPage->leaf );
  }
  rc = insertCell(pPage, idx, newCell, szNew, 0, 0);
  assert( rc!=SQLITE_OK || pPage->nCell>0 || pPage->nOverflow>0 );

  /* If no error has occured, call balance() to deal with any overflow and
  ** move the cursor to point at the root of the table (since balance may
  ** have rearranged the table in such a way as to invalidate BtCursor.apPage[]
  ** or BtCursor.aiIdx[]).
  **
  ** Except, if all of the following are true, do nothing:
  **
  **   * Inserting the new cell did not cause overflow,
  **
  **   * Before inserting the new cell the cursor was pointing at the 
  **     largest key in an intkey B-Tree, and
  **
  **   * The key value associated with the new cell is now the largest 
  **     in the B-Tree.
  **
  ** In this case the cursor can be safely left pointing at the (new) 
  ** largest key value in the B-Tree. Doing so speeds up inserting a set
  ** of entries with increasing integer key values via a single cursor
  ** (comes up with "INSERT INTO ... SELECT ..." statements), as 
  ** the next insert operation is not required to seek the cursor.
  */
  if( rc==SQLITE_OK 
   && (pPage->nOverflow || !pCur->atLast || loc>=0 || !pCur->apPage[0]->intKey)
  ){
    rc = balance(pCur, 1);
    if( rc==SQLITE_OK ){
      moveToRoot(pCur);
    }
  }
  
  /* Must make sure nOverflow is reset to zero even if the balance()
  ** fails.  Internal data structure corruption will result otherwise. */
  pCur->apPage[pCur->iPage]->nOverflow = 0;




end_insert:
  return rc;
}

/*
** Delete the entry that the cursor is pointing to.  The cursor
** is left pointing at a arbitrary location.
................................................................................
        */
        VVA_ONLY( Pgno leafPgno = pLeafPage->pgno );
        rc = saveCursorPosition(&leafCur);
        if( rc==SQLITE_OK ){
          rc = sqlite3BtreeNext(&leafCur, &notUsed);
        }
        pLeafPage = leafCur.apPage[leafCur.iPage];
        assert( rc!=SQLITE_OK || pLeafPage->pgno==leafPgno );
        assert( rc!=SQLITE_OK || leafCur.aiIdx[leafCur.iPage]==0 );
      }

      if( SQLITE_OK==rc
       && SQLITE_OK==(rc = sqlite3PagerWrite(pLeafPage->pDbPage)) 
      ){
        dropCell(pLeafPage, 0, szNext);
        VVA_ONLY( leafCur.pagesShuffled = 0 );
................................................................................
  sqlite3PagerUnref(pRoot->pDbPage);
  *piTable = (int)pgnoRoot;
  return SQLITE_OK;
}
SQLITE_PRIVATE int sqlite3BtreeCreateTable(Btree *p, int *piTable, int flags){
  int rc;
  sqlite3BtreeEnter(p);

  rc = btreeCreateTable(p, piTable, flags);
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Erase the given database page and all its children.  Return
................................................................................
** integer value pointed to by pnChange is incremented by the number of
** entries in the table.
*/
SQLITE_PRIVATE int sqlite3BtreeClearTable(Btree *p, int iTable, int *pnChange){
  int rc;
  BtShared *pBt = p->pBt;
  sqlite3BtreeEnter(p);

  assert( p->inTrans==TRANS_WRITE );
  if( (rc = checkForReadConflicts(p, iTable, 0, 1))!=SQLITE_OK ){
    /* nothing to do */
  }else if( SQLITE_OK!=(rc = saveAllCursors(pBt, iTable, 0)) ){
    /* nothing to do */
  }else{
    rc = clearDatabasePage(pBt, (Pgno)iTable, 0, pnChange);
................................................................................
    releasePage(pPage);
  }
  return rc;  
}
SQLITE_PRIVATE int sqlite3BtreeDropTable(Btree *p, int iTable, int *piMoved){
  int rc;
  sqlite3BtreeEnter(p);

  rc = btreeDropTable(p, iTable, piMoved);
  sqlite3BtreeLeave(p);
  return rc;
}


/*
................................................................................
SQLITE_PRIVATE int sqlite3BtreeGetMeta(Btree *p, int idx, u32 *pMeta){
  DbPage *pDbPage = 0;
  int rc;
  unsigned char *pP1;
  BtShared *pBt = p->pBt;

  sqlite3BtreeEnter(p);


  /* Reading a meta-data value requires a read-lock on page 1 (and hence
  ** the sqlite_master table. We grab this lock regardless of whether or
  ** not the SQLITE_ReadUncommitted flag is set (the table rooted at page
  ** 1 is treated as a special case by querySharedCacheTableLock()
  ** and setSharedCacheTableLock()).
  */
................................................................................
  /* If autovacuumed is disabled in this build but we are trying to 
  ** access an autovacuumed database, then make the database readonly. 
  */
#ifdef SQLITE_OMIT_AUTOVACUUM
  if( idx==4 && *pMeta>0 ) pBt->readOnly = 1;
#endif

  /* If there is currently an open transaction, grab a read-lock 
  ** on page 1 of the database file. This is done to make sure that
  ** no other connection can modify the meta value just read from
  ** the database until the transaction is concluded.
  */
  if( p->inTrans>0 ){
    rc = setSharedCacheTableLock(p, 1, READ_LOCK);
  }
  sqlite3BtreeLeave(p);
  return rc;
}

/*
** Write meta-information back into the database.  Meta[0] is
** read-only and may not be written.
................................................................................
*/
SQLITE_PRIVATE int sqlite3BtreeUpdateMeta(Btree *p, int idx, u32 iMeta){
  BtShared *pBt = p->pBt;
  unsigned char *pP1;
  int rc;
  assert( idx>=1 && idx<=15 );
  sqlite3BtreeEnter(p);

  assert( p->inTrans==TRANS_WRITE );
  assert( pBt->pPage1!=0 );
  pP1 = pBt->pPage1->aData;
  rc = sqlite3PagerWrite(pBt->pPage1->pDbPage);
  if( rc==SQLITE_OK ){
    put4byte(&pP1[36 + idx*4], iMeta);
#ifndef SQLITE_OMIT_AUTOVACUUM
................................................................................
){
  int rc;
  u8 ePtrmapType;
  Pgno iPtrmapParent;

  rc = ptrmapGet(pCheck->pBt, iChild, &ePtrmapType, &iPtrmapParent);
  if( rc!=SQLITE_OK ){
    if( rc==SQLITE_NOMEM || rc==SQLITE_IOERR_NOMEM ) pCheck->mallocFailed = 1;
    checkAppendMsg(pCheck, zContext, "Failed to read ptrmap key=%d", iChild);
    return;
  }

  if( ePtrmapType!=eType || iPtrmapParent!=iParent ){
    checkAppendMsg(pCheck, zContext, 
      "Bad ptr map entry key=%d expected=(%d,%d) got=(%d,%d)", 
................................................................................
  /* Check that the page exists
  */
  pBt = pCheck->pBt;
  usableSize = pBt->usableSize;
  if( iPage==0 ) return 0;
  if( checkRef(pCheck, iPage, zParentContext) ) return 0;
  if( (rc = sqlite3BtreeGetPage(pBt, (Pgno)iPage, &pPage, 0))!=0 ){
    if( rc==SQLITE_NOMEM || rc==SQLITE_IOERR_NOMEM ) pCheck->mallocFailed = 1;
    checkAppendMsg(pCheck, zContext,
       "unable to get the page. error code=%d", rc);
    return 0;
  }
  if( (rc = sqlite3BtreeInitPage(pPage))!=0 ){
    assert( rc==SQLITE_CORRUPT );  /* The only possible error from InitPage */
    checkAppendMsg(pCheck, zContext, 
................................................................................
  Pgno i;
  int nRef;
  IntegrityCk sCheck;
  BtShared *pBt = p->pBt;
  char zErr[100];

  sqlite3BtreeEnter(p);

  nRef = sqlite3PagerRefcount(pBt->pPager);
  if( lockBtreeWithRetry(p)!=SQLITE_OK ){
    *pnErr = 1;
    sqlite3BtreeLeave(p);
    return sqlite3DbStrDup(0, "cannot acquire a read lock on the database");
  }
  sCheck.pBt = pBt;
................................................................................
*************************************************************************
**
** This file contains code use to manipulate "Mem" structure.  A "Mem"
** stores a single value in the VDBE.  Mem is an opaque structure visible
** only within the VDBE.  Interface routines refer to a Mem using the
** name sqlite_value
**
** $Id: vdbemem.c,v 1.144 2009/05/05 12:54:50 drh Exp $
*/

/*
** Call sqlite3VdbeMemExpandBlob() on the supplied value (type Mem*)
** P if required.
*/
#define expandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0)
................................................................................
  const int nByte = 32;

  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( !(fg&MEM_Zero) );
  assert( !(fg&(MEM_Str|MEM_Blob)) );
  assert( fg&(MEM_Int|MEM_Real) );
  assert( (pMem->flags&MEM_RowSet)==0 );
  assert( EIGHT_BYTE_ALIGNMENT(pMem) );


  if( sqlite3VdbeMemGrow(pMem, nByte, 0) ){
    return SQLITE_NOMEM;
  }

  /* For a Real or Integer, use sqlite3_mprintf() to produce the UTF-8
................................................................................
/*
** If the memory cell contains a string value that must be freed by
** invoking an external callback, free it now. Calling this function
** does not free any Mem.zMalloc buffer.
*/
SQLITE_PRIVATE void sqlite3VdbeMemReleaseExternal(Mem *p){
  assert( p->db==0 || sqlite3_mutex_held(p->db->mutex) );
  if( p->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet) ){
    if( p->flags&MEM_Agg ){
      sqlite3VdbeMemFinalize(p, p->u.pDef);
      assert( (p->flags & MEM_Agg)==0 );
      sqlite3VdbeMemRelease(p);
    }else if( p->flags&MEM_Dyn && p->xDel ){
      assert( (p->flags&MEM_RowSet)==0 );
      p->xDel((void *)p->z);
      p->xDel = 0;
    }else if( p->flags&MEM_RowSet ){
      sqlite3RowSetClear(p->u.pRowSet);
    }
  }
}

/*
** Release any memory held by the Mem. This may leave the Mem in an
** inconsistent state, for example with (Mem.z==0) and
** (Mem.type==SQLITE_TEXT).
................................................................................
** an SQL-NULL value, return 0.
**
** If pMem represents a string value, its encoding might be changed.
*/
SQLITE_PRIVATE i64 sqlite3VdbeIntValue(Mem *pMem){
  int flags;
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( EIGHT_BYTE_ALIGNMENT(pMem) );
  flags = pMem->flags;
  if( flags & MEM_Int ){
    return pMem->u.i;
  }else if( flags & MEM_Real ){
    return doubleToInt64(pMem->r);
  }else if( flags & (MEM_Str|MEM_Blob) ){
    i64 value;
................................................................................
** Return the best representation of pMem that we can get into a
** double.  If pMem is already a double or an integer, return its
** value.  If it is a string or blob, try to convert it to a double.
** If it is a NULL, return 0.0.
*/
SQLITE_PRIVATE double sqlite3VdbeRealValue(Mem *pMem){
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( EIGHT_BYTE_ALIGNMENT(pMem) );
  if( pMem->flags & MEM_Real ){
    return pMem->r;
  }else if( pMem->flags & MEM_Int ){
    return (double)pMem->u.i;
  }else if( pMem->flags & (MEM_Str|MEM_Blob) ){
    /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
    double val = (double)0;
................................................................................
** The MEM structure is already a MEM_Real.  Try to also make it a
** MEM_Int if we can.
*/
SQLITE_PRIVATE void sqlite3VdbeIntegerAffinity(Mem *pMem){
  assert( pMem->flags & MEM_Real );
  assert( (pMem->flags & MEM_RowSet)==0 );
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( EIGHT_BYTE_ALIGNMENT(pMem) );

  pMem->u.i = doubleToInt64(pMem->r);
  if( pMem->r==(double)pMem->u.i ){
    pMem->flags |= MEM_Int;
  }
}

/*
** Convert pMem to type integer.  Invalidate any prior representations.
*/
SQLITE_PRIVATE int sqlite3VdbeMemIntegerify(Mem *pMem){
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( (pMem->flags & MEM_RowSet)==0 );
  assert( EIGHT_BYTE_ALIGNMENT(pMem) );

  pMem->u.i = sqlite3VdbeIntValue(pMem);
  MemSetTypeFlag(pMem, MEM_Int);
  return SQLITE_OK;
}

/*
** Convert pMem so that it is of type MEM_Real.
** Invalidate any prior representations.
*/
SQLITE_PRIVATE int sqlite3VdbeMemRealify(Mem *pMem){
  assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
  assert( EIGHT_BYTE_ALIGNMENT(pMem) );

  pMem->r = sqlite3VdbeRealValue(pMem);
  MemSetTypeFlag(pMem, MEM_Real);
  return SQLITE_OK;
}

/*
** Convert pMem so that it has types MEM_Real or MEM_Int or both.
................................................................................
  }
  op = pExpr->op;

  if( op==TK_STRING || op==TK_FLOAT || op==TK_INTEGER ){
    zVal = sqlite3DbStrNDup(db, (char*)pExpr->token.z, pExpr->token.n);
    pVal = sqlite3ValueNew(db);
    if( !zVal || !pVal ) goto no_mem;

    sqlite3ValueSetStr(pVal, -1, zVal, SQLITE_UTF8, SQLITE_DYNAMIC);
    if( (op==TK_INTEGER || op==TK_FLOAT ) && affinity==SQLITE_AFF_NONE ){
      sqlite3ValueApplyAffinity(pVal, SQLITE_AFF_NUMERIC, SQLITE_UTF8);
    }else{
      sqlite3ValueApplyAffinity(pVal, affinity, SQLITE_UTF8);
    }
    if( enc!=SQLITE_UTF8 ){
      sqlite3VdbeChangeEncoding(pVal, enc);
    }
  }else if( op==TK_UMINUS ) {
    if( SQLITE_OK==sqlite3ValueFromExpr(db,pExpr->pLeft,enc,affinity,&pVal) ){
      pVal->u.i = -1 * pVal->u.i;
      /* (double)-1 In case of SQLITE_OMIT_FLOATING_POINT... */
      pVal->r = (double)-1 * pVal->r;
    }
................................................................................
**
*************************************************************************
** This file contains code used for creating, destroying, and populating
** a VDBE (or an "sqlite3_stmt" as it is known to the outside world.)  Prior
** to version 2.8.7, all this code was combined into the vdbe.c source file.
** But that file was getting too big so this subroutines were split out.
**
** $Id: vdbeaux.c,v 1.456 2009/05/05 15:46:43 drh Exp $
*/



/*
** When debugging the code generator in a symbolic debugger, one can
** set the sqlite3VdbeAddopTrace to 1 and all opcodes will be printed
................................................................................

/*
** Declare to the Vdbe that the BTree object at db->aDb[i] is used.
**
*/
SQLITE_PRIVATE void sqlite3VdbeUsesBtree(Vdbe *p, int i){
  int mask;
  assert( i>=0 && i<p->db->nDb && i<sizeof(u32)*8 );
  assert( i<(int)sizeof(p->btreeMask)*8 );
  mask = ((u32)1)<<i;
  if( (p->btreeMask & mask)==0 ){
    p->btreeMask |= mask;
    sqlite3BtreeMutexArrayInsert(&p->aMutex, p->db->aDb[i].pBt);
  }
}


................................................................................
static void allocSpace(
  char *pp,            /* IN/OUT: Set *pp to point to allocated buffer */
  int nByte,           /* Number of bytes to allocate */
  u8 **ppFrom,         /* IN/OUT: Allocate from *ppFrom */
  u8 *pEnd,            /* Pointer to 1 byte past the end of *ppFrom buffer */
  int *pnByte          /* If allocation cannot be made, increment *pnByte */
){
  assert( EIGHT_BYTE_ALIGNMENT(*ppFrom) );
  if( (*(void**)pp)==0 ){
    nByte = ROUND8(nByte);
    if( (pEnd - *ppFrom)>=nByte ){
      *(void**)pp = (void *)*ppFrom;
      *ppFrom += nByte;
    }else{
      *pnByte += nByte;
................................................................................
    u8 *zEnd = (u8 *)&p->aOp[p->nOpAlloc];
    int nByte;
    int nArg;       /* Maximum number of args passed to a user function. */
    resolveP2Values(p, &nArg);
    if( isExplain && nMem<10 ){
      nMem = 10;
    }
    zCsr += (zCsr - (u8*)0)&7;
    assert( EIGHT_BYTE_ALIGNMENT(zCsr) );
    if( zEnd<zCsr ) zEnd = zCsr;

    do {
      memset(zCsr, 0, zEnd-zCsr);
      nByte = 0;
      allocSpace((char*)&p->aMem, nMem*sizeof(Mem), &zCsr, zEnd, &nByte);
      allocSpace((char*)&p->aVar, nVar*sizeof(Mem), &zCsr, zEnd, &nByte);
      allocSpace((char*)&p->apArg, nArg*sizeof(Mem*), &zCsr, zEnd, &nByte);
................................................................................
    }
    db->nStatement--;
    p->iStatement = 0;
  }
  return rc;
}

/*
** If SQLite is compiled to support shared-cache mode and to be threadsafe,
** this routine obtains the mutex associated with each BtShared structure
** that may be accessed by the VM passed as an argument. In doing so it
** sets the BtShared.db member of each of the BtShared structures, ensuring
** that the correct busy-handler callback is invoked if required.
**
** If SQLite is not threadsafe but does support shared-cache mode, then
** sqlite3BtreeEnterAll() is invoked to set the BtShared.db variables
** of all of BtShared structures accessible via the database handle 
** associated with the VM. Of course only a subset of these structures
** will be accessed by the VM, and we could use Vdbe.btreeMask to figure
** that subset out, but there is no advantage to doing so.
**
** If SQLite is not threadsafe and does not support shared-cache mode, this
** function is a no-op.
*/
#ifndef SQLITE_OMIT_SHARED_CACHE
SQLITE_PRIVATE void sqlite3VdbeMutexArrayEnter(Vdbe *p){
#if SQLITE_THREADSAFE
  sqlite3BtreeMutexArrayEnter(&p->aMutex);
#else
  sqlite3BtreeEnterAll(p->db);
#endif
}
#endif

/*
** This routine is called the when a VDBE tries to halt.  If the VDBE
** has made changes and is in autocommit mode, then commit those
** changes.  If a rollback is needed, then do the rollback.
**
** This routine is the only way to move the state of a VM from
** SQLITE_MAGIC_RUN to SQLITE_MAGIC_HALT.  It is harmless to
................................................................................
  /* No commit or rollback needed if the program never started */
  if( p->pc>=0 ){
    int mrc;   /* Primary error code from p->rc */
    int eStatementOp = 0;
    int isSpecialError;            /* Set to true if a 'special' error */

    /* Lock all btrees used by the statement */
    sqlite3VdbeMutexArrayEnter(p);

    /* Check for one of the special errors */
    mrc = p->rc & 0xff;
    isSpecialError = mrc==SQLITE_NOMEM || mrc==SQLITE_IOERR
                     || mrc==SQLITE_INTERRUPT || mrc==SQLITE_FULL;
    if( isSpecialError ){
      /* If the query was read-only, we need do no rollback at all. Otherwise,
................................................................................
** are always destroyed.  To destroy all auxdata entries, call this
** routine with mask==0.
*/
SQLITE_PRIVATE void sqlite3VdbeDeleteAuxData(VdbeFunc *pVdbeFunc, int mask){
  int i;
  for(i=0; i<pVdbeFunc->nAux; i++){
    struct AuxData *pAux = &pVdbeFunc->apAux[i];
    if( (i>31 || !(mask&(((u32)1)<<i))) && pAux->pAux ){
      if( pAux->xDelete ){
        pAux->xDelete(pAux->pAux);
      }
      pAux->pAux = 0;
    }
  }
}
................................................................................
#ifdef SQLITE_TEST
    extern int sqlite3_search_count;
#endif
    assert( p->isTable );
    rc = sqlite3BtreeMovetoUnpacked(p->pCursor, 0, p->movetoTarget, 0, &res);
    if( rc ) return rc;
    p->lastRowid = keyToInt(p->movetoTarget);
    p->rowidIsValid = ALWAYS(res==0) ?1:0;
    if( NEVER(res<0) ){
      rc = sqlite3BtreeNext(p->pCursor, &res);
      if( rc ) return rc;
    }
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif
    p->deferredMoveto = 0;
................................................................................
** The returned structure should be closed by a call to
** sqlite3VdbeDeleteUnpackedRecord().
*/ 
SQLITE_PRIVATE UnpackedRecord *sqlite3VdbeRecordUnpack(
  KeyInfo *pKeyInfo,     /* Information about the record format */
  int nKey,              /* Size of the binary record */
  const void *pKey,      /* The binary record */
  char *pSpace,          /* Unaligned space available to hold the object */
  int szSpace            /* Size of pSpace[] in bytes */
){
  const unsigned char *aKey = (const unsigned char *)pKey;
  UnpackedRecord *p;  /* The unpacked record that we will return */
  int nByte;          /* Memory space needed to hold p, in bytes */
  int d;
  u32 idx;
  u16 u;              /* Unsigned loop counter */
  u32 szHdr;
  Mem *pMem;
  int nOff;           /* Increase pSpace by this much to 8-byte align it */
  

  /*
  ** We want to shift the pointer pSpace up such that it is 8-byte aligned.
  ** Thus, we need to calculate a value, nOff, between 0 and 7, to shift 
  ** it by.  If pSpace is already 8-byte aligned, nOff should be zero.
  */
  nOff = (8 - (SQLITE_PTR_TO_INT(pSpace) & 7)) & 7;
  pSpace += nOff;
  szSpace -= nOff;
  nByte = ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*(pKeyInfo->nField+1);
  if( nByte>szSpace ){
    p = sqlite3DbMallocRaw(pKeyInfo->db, nByte);
    if( p==0 ) return 0;
    p->flags = UNPACKED_NEED_FREE | UNPACKED_NEED_DESTROY;
  }else{
    p = (UnpackedRecord*)pSpace;
    p->flags = UNPACKED_NEED_DESTROY;
  }
  p->pKeyInfo = pKeyInfo;
  p->nField = pKeyInfo->nField + 1;
  p->aMem = pMem = (Mem*)&((char*)p)[ROUND8(sizeof(UnpackedRecord))];
  assert( EIGHT_BYTE_ALIGNMENT(pMem) );
  idx = getVarint32(aKey, szHdr);
  d = szHdr;
  u = 0;
  while( idx<szHdr && u<p->nField ){
    u32 serial_type;

    idx += getVarint32(&aKey[idx], serial_type);
................................................................................
                           i<nField ? pKeyInfo->aColl[i] : 0);
    if( rc!=0 ){
      break;
    }
    i++;
  }
  if( mem1.zMalloc ) sqlite3VdbeMemRelease(&mem1);

  /* If the PREFIX_SEARCH flag is set and all fields except the final
  ** rowid field were equal, then clear the PREFIX_SEARCH flag and set 
  ** pPKey2->rowid to the value of the rowid field in (pKey1, nKey1).
  ** This is used by the OP_IsUnique opcode.
  */
  if( (pPKey2->flags & UNPACKED_PREFIX_SEARCH) && i==(pPKey2->nField-1) ){
    assert( idx1==szHdr1 && rc );
    assert( mem1.flags & MEM_Int );
    pPKey2->flags &= ~UNPACKED_PREFIX_SEARCH;
    pPKey2->rowid = mem1.u.i;
  }

  if( rc==0 ){
    /* rc==0 here means that one of the keys ran out of fields and
    ** all the fields up to that point were equal. If the UNPACKED_INCRKEY
    ** flag is set, then break the tie by treating key2 as larger.
    ** If the UPACKED_PREFIX_MATCH flag is set, then keys with common prefixes
    ** are considered to be equal.  Otherwise, the longer key is the 
................................................................................
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains code use to implement APIs that are part of the
** VDBE.
**
** $Id: vdbeapi.c,v 1.164 2009/04/27 18:46:06 drh Exp $
*/

#if 0 && defined(SQLITE_ENABLE_MEMORY_MANAGEMENT)
/*
** The following structure contains pointers to the end points of a
** doubly-linked list of all compiled SQL statements that may be holding
** buffers eligible for release when the sqlite3_release_memory() interface is
................................................................................
}
SQLITE_API void sqlite3_result_zeroblob(sqlite3_context *pCtx, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetZeroBlob(&pCtx->s, n);
}
SQLITE_API void sqlite3_result_error_code(sqlite3_context *pCtx, int errCode){
  pCtx->isError = errCode;
  if( pCtx->s.flags & MEM_Null ){
    sqlite3VdbeMemSetStr(&pCtx->s, sqlite3ErrStr(errCode), -1, 
                         SQLITE_UTF8, SQLITE_STATIC);
  }
}

/* Force an SQLITE_TOOBIG error. */
SQLITE_API void sqlite3_result_error_toobig(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE_TOOBIG;
  sqlite3VdbeMemSetStr(&pCtx->s, "string or blob too big", -1, 
................................................................................
  /* Assert that malloc() has not failed */
  db = p->db;
  if( db->mallocFailed ){
    return SQLITE_NOMEM;
  }

  if( p->pc<=0 && p->expired ){
    if( ALWAYS(p->rc==SQLITE_OK) ){
      p->rc = SQLITE_SCHEMA;
    }
    rc = SQLITE_ERROR;
    goto end_of_step;
  }
  if( sqlite3SafetyOn(db) ){
    p->rc = SQLITE_MISUSE;
................................................................................
    sqlite3_mutex_enter(db->mutex);
    while( (rc = sqlite3Step(v))==SQLITE_SCHEMA
           && cnt++ < 5
           && (rc = vdbeReprepare(v))==SQLITE_OK ){
      sqlite3_reset(pStmt);
      v->expired = 0;
    }
    if( rc==SQLITE_SCHEMA && ALWAYS(v->isPrepareV2) && ALWAYS(db->pErr) ){
      /* This case occurs after failing to recompile an sql statement. 
      ** The error message from the SQL compiler has already been loaded 
      ** into the database handle. This block copies the error message 
      ** from the database handle into the statement and sets the statement
      ** program counter to 0 to ensure that when the statement is 
      ** finalized or reset the parser error message is available via
      ** sqlite3_errmsg() and sqlite3_errcode().
................................................................................
  sqlite3_context *context,  /* The function calling context */
  int NotUsed,               /* Number of arguments to the function */
  sqlite3_value **NotUsed2   /* Value of each argument */
){
  const char *zName = context->pFunc->zName;
  char *zErr;
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  zErr = sqlite3_mprintf(
      "unable to use function %s in the requested context", zName);
  sqlite3_result_error(context, zErr, -1);
  sqlite3_free(zErr);
}

/*
** Allocate or return the aggregate context for a user function.  A new
................................................................................
  if( pVm && pVm->pResultSet!=0 && i<pVm->nResColumn && i>=0 ){
    sqlite3_mutex_enter(pVm->db->mutex);
    vals = sqlite3_data_count(pStmt);
    pOut = &pVm->pResultSet[i];
  }else{
    /* ((double)0) In case of SQLITE_OMIT_FLOATING_POINT... */
    static const Mem nullMem = {{0}, (double)0, 0, "", 0, MEM_Null, SQLITE_NULL, 0, 0, 0 };
    if( pVm && ALWAYS(pVm->db) ){
      sqlite3_mutex_enter(pVm->db->mutex);
      sqlite3Error(pVm->db, SQLITE_RANGE, 0);
    }
    pOut = (Mem*)&nullMem;
  }
  return pOut;
}
................................................................................
  int N,
  const void *(*xFunc)(Mem*),
  int useType
){
  const void *ret = 0;
  Vdbe *p = (Vdbe *)pStmt;
  int n;
  sqlite3 *db = p->db;
  

  assert( db!=0 );
  n = sqlite3_column_count(pStmt);
  if( N<n && N>=0 ){
    N += useType*n;
    sqlite3_mutex_enter(db->mutex);
    assert( db->mallocFailed==0 );
    ret = xFunc(&p->aColName[N]);

     /* A malloc may have failed inside of the xFunc() call. If this
    ** is the case, clear the mallocFailed flag and return NULL.
    */
    if( db->mallocFailed ){
      db->mallocFailed = 0;
      ret = 0;
    }
    sqlite3_mutex_leave(db->mutex);

  }
  return ret;
}

/*
** Return the name of the Nth column of the result set returned by SQL
** statement pStmt.
................................................................................
  void (*xDel)(void*)
){
  return bindText(pStmt, i, zData, nData, xDel, SQLITE_UTF16NATIVE);
}
#endif /* SQLITE_OMIT_UTF16 */
SQLITE_API int sqlite3_bind_value(sqlite3_stmt *pStmt, int i, const sqlite3_value *pValue){
  int rc;
  switch( pValue->type ){
    case SQLITE_INTEGER: {
      rc = sqlite3_bind_int64(pStmt, i, pValue->u.i);
      break;
    }
    case SQLITE_FLOAT: {
      rc = sqlite3_bind_double(pStmt, i, pValue->r);
      break;
    }
    case SQLITE_BLOB: {

      if( pValue->flags & MEM_Zero ){
        rc = sqlite3_bind_zeroblob(pStmt, i, pValue->u.nZero);
      }else{
        rc = sqlite3_bind_blob(pStmt, i, pValue->z, pValue->n,SQLITE_TRANSIENT);
      }

      break;
    }
    case SQLITE_TEXT: {
      rc = bindText(pStmt,i,  pValue->z, pValue->n, SQLITE_TRANSIENT,
                              pValue->enc);
      break;
    }
    default: {
      rc = sqlite3_bind_null(pStmt, i);
      break;
    }
  }
  return rc;
}
SQLITE_API int sqlite3_bind_zeroblob(sqlite3_stmt *pStmt, int i, int n){
  int rc;
  Vdbe *p = (Vdbe *)pStmt;
  rc = vdbeUnbind(p, i);
  if( rc==SQLITE_OK ){
................................................................................
/*
** Create a mapping from variable numbers to variable names
** in the Vdbe.azVar[] array, if such a mapping does not already
** exist.
*/
static void createVarMap(Vdbe *p){
  if( !p->okVar ){


    int j;
    Op *pOp;
    sqlite3_mutex_enter(p->db->mutex);
    /* The race condition here is harmless.  If two threads call this
    ** routine on the same Vdbe at the same time, they both might end
    ** up initializing the Vdbe.azVar[] array.  That is a little extra
    ** work but it results in the same answer.
    */
    for(j=0, pOp=p->aOp; j<p->nOp; j++, pOp++){
      if( pOp->opcode==OP_Variable ){
        assert( pOp->p1>0 && pOp->p1<=p->nVar );
        p->azVar[pOp->p1-1] = pOp->p4.z;
      }
    }
    p->okVar = 1;

    sqlite3_mutex_leave(p->db->mutex);
  }
}

/*
** Return the name of a wildcard parameter.  Return NULL if the index
** is out of range or if the wildcard is unnamed.
................................................................................
    }
  }
  return 0;
}

/*
** Transfer all bindings from the first statement over to the second.


*/
SQLITE_PRIVATE int sqlite3TransferBindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
  Vdbe *pFrom = (Vdbe*)pFromStmt;
  Vdbe *pTo = (Vdbe*)pToStmt;
  int i;


  assert( pTo->db==pFrom->db );





  assert( pTo->nVar==pFrom->nVar );
  sqlite3_mutex_enter(pTo->db->mutex);
  for(i=0; i<pFrom->nVar; i++){
    sqlite3VdbeMemMove(&pTo->aVar[i], &pFrom->aVar[i]);
  }
  sqlite3_mutex_leave(pTo->db->mutex);

  return SQLITE_OK;
}

#ifndef SQLITE_OMIT_DEPRECATED
/*
** Deprecated external interface.  Internal/core SQLite code
** should call sqlite3TransferBindings.
**
** Is is misuse to call this routine with statements from different
** database connections.  But as this is a deprecated interface, we
** will not bother to check for that condition.
**
** If the two statements contain a different number of bindings, then
** an SQLITE_ERROR is returned.  Nothing else can go wrong, so otherwise
** SQLITE_OK is returned.
*/
SQLITE_API int sqlite3_transfer_bindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
  Vdbe *pFrom = (Vdbe*)pFromStmt;
  Vdbe *pTo = (Vdbe*)pToStmt;
  if( pFrom->nVar!=pTo->nVar ){
    return SQLITE_ERROR;
  }
  return sqlite3TransferBindings(pFromStmt, pToStmt);
}
#endif

/*
** Return the sqlite3* database handle to which the prepared statement given
** in the argument belongs.  This is the same database handle that was
................................................................................
**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.841 2009/05/04 11:42:30 danielk1977 Exp $
*/

/*
** The following global variable is incremented every time a cursor
** moves, either by the OP_SeekXX, OP_Next, or OP_Prev opcodes.  The test
** procedures use this information to make sure that indices are
** working correctly.  This variable has no function other than to
................................................................................
    fprintf(out, " NULL");
  }else if( (p->flags & (MEM_Int|MEM_Str))==(MEM_Int|MEM_Str) ){
    fprintf(out, " si:%lld", p->u.i);
  }else if( p->flags & MEM_Int ){
    fprintf(out, " i:%lld", p->u.i);
  }else if( p->flags & MEM_Real ){
    fprintf(out, " r:%g", p->r);
  }else if( p->flags & MEM_RowSet ){
    fprintf(out, " (rowset)");
  }else{
    char zBuf[200];
    sqlite3VdbeMemPrettyPrint(p, zBuf);
    fprintf(out, " ");
    fprintf(out, "%s", zBuf);
  }
}
................................................................................
#ifdef VDBE_PROFILE
  u64 start;                 /* CPU clock count at start of opcode */
  int origPc;                /* Program counter at start of opcode */
#endif
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  int nProgressOps = 0;      /* Opcodes executed since progress callback. */
#endif

  /* Temporary space into which to unpack a record. */
  char aTempRec[ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*3 + 7];

  assert( p->magic==VDBE_MAGIC_RUN );  /* sqlite3_step() verifies this */
  assert( db->magic==SQLITE_MAGIC_BUSY );
  sqlite3VdbeMutexArrayEnter(p);
  if( p->rc==SQLITE_NOMEM ){
    /* This happens if a malloc() inside a call to sqlite3_column_text() or
    ** sqlite3_column_text16() failed.  */
    goto no_mem;
  }
  assert( p->rc==SQLITE_OK || p->rc==SQLITE_BUSY );
  p->rc = SQLITE_OK;
................................................................................
** Store the number of entries (an integer value) in the table or index 
** opened by cursor P1 in register P2
*/
#ifndef SQLITE_OMIT_BTREECOUNT
case OP_Count: {         /* out2-prerelease */
  i64 nEntry;
  BtCursor *pCrsr = p->apCsr[pOp->p1]->pCursor;
  if( pCrsr ){
    rc = sqlite3BtreeCount(pCrsr, &nEntry);
  }else{
    nEntry = 0;
  }
  pOut->flags = MEM_Int;
  pOut->u.i = nEntry;
  break;
}
#endif

/* Opcode: Statement P1 * * * *
................................................................................
        /* If there is no open transaction, then mark this as a special
        ** "transaction savepoint". */
        if( db->autoCommit ){
          db->autoCommit = 0;
          db->isTransactionSavepoint = 1;
        }else{
          db->nSavepoint++;
        }
    
        /* Link the new savepoint into the database handle's list. */
        pNew->pNext = db->pSavepoint;
        db->pSavepoint = pNew;
      }
    }
  }else{
................................................................................
    if( !alreadyExists ) pc = pOp->p2 - 1;
  }
  break;
}

/* Opcode: IsUnique P1 P2 P3 P4 *
**
** Cursor P1 is open on an index.  So it has no data and its key consists 
** of a record generated by OP_MakeRecord where the last field is the 
** rowid of the entry that the index refers to.
**
** The P3 register contains an integer record number. Call this record 
** number R. Register P4 is the first in a set of N contiguous registers
** that make up an unpacked index key that can be used with cursor P1.
** The value of N can be inferred from the cursor. N includes the rowid
** value appended to the end of the index record. This rowid value may
** or may not be the same as R.
**
** If any of the N registers beginning with register P4 contains a NULL
** value, jump immediately to P2.
**
** Otherwise, this instruction checks if cursor P1 contains an entry
** where the first (N-1) fields match but the rowid value at the end
** of the index entry is not R. If there is no such entry, control jumps
** to instruction P2. Otherwise, the rowid of the conflicting index
** entry is copied to register P3 and control falls through to the next
** instruction.
**
** See also: NotFound, NotExists, Found
*/
case OP_IsUnique: {        /* jump, in3 */
  int ii;
  VdbeCursor *pCx;
  BtCursor *pCrsr;
  int nField;
  Mem *aMem = &p->aMem[pOp->p4.i];

  /* Assert that the values of parameters P1 and P4 are in range. */

  assert( pOp->p4type==P4_INT32 );
  assert( pOp->p4.i>0 && pOp->p4.i<=p->nMem );



  assert( pOp->p1>=0 && pOp->p1<p->nCursor );





















  /* Find the index cursor. */
  pCx = p->apCsr[pOp->p1];
  assert( pCx->deferredMoveto==0 );
  pCx->seekResult = 0;
  pCx->cacheStatus = CACHE_STALE;




  pCrsr = pCx->pCursor;




  /* If any of the values are NULL, take the jump. */
  nField = pCx->pKeyInfo->nField;
  for(ii=0; ii<nField; ii++){
    if( aMem[ii].flags & MEM_Null ){
      pc = pOp->p2 - 1;

      pCrsr = 0;
      break;
    }
  }






  assert( (aMem[nField].flags & MEM_Null)==0 );

  if( pCrsr!=0 ){
    UnpackedRecord r;                  /* B-Tree index search key */
    i64 R;                             /* Rowid stored in register P3 */









    /* Populate the index search key. */
    r.pKeyInfo = pCx->pKeyInfo;
    r.nField = nField + 1;
    r.flags = UNPACKED_PREFIX_SEARCH;
    r.aMem = aMem;


    /* Extract the value of R from register P3. */
    sqlite3VdbeMemIntegerify(pIn3);
    R = pIn3->u.i;

    /* Search the B-Tree index. If no conflicting record is found, jump
    ** to P2. Otherwise, copy the rowid of the conflicting record to
    ** register P3 and fall through to the next instruction.  */
    rc = sqlite3BtreeMovetoUnpacked(pCrsr, &r, 0, 0, &pCx->seekResult);
    if( (r.flags & UNPACKED_PREFIX_SEARCH) || r.rowid==R ){
      pc = pOp->p2 - 1;

    }else{
      pIn3->u.i = r.rowid;
    }







  }
  break;
}

/* Opcode: NotExists P1 P2 P3 * *
**
** Use the content of register P3 as a integer key.  If a record 
................................................................................
  assert( p->apCsr[i]!=0 );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    int res = 0;
    u64 iKey;
    assert( pIn3->flags & MEM_Int );
    assert( p->apCsr[i]->isTable );
    iKey = intToKey(pIn3->u.i);
    rc = sqlite3BtreeMovetoUnpacked(pCrsr, 0, iKey, 0, &res);
    pC->lastRowid = pIn3->u.i;
    pC->rowidIsValid = res==0 ?1:0;
    pC->nullRow = 0;
    pC->cacheStatus = CACHE_STALE;
    pC->deferredMoveto = 0;
    if( res!=0 ){
      pc = pOp->p2 - 1;
      assert( pC->rowidIsValid==0 );
    }
    pC->seekResult = res;
  }else if( !pC->pseudoTable ){
    /* This happens when an attempt to open a read cursor on the 
    ** sqlite_master table returns SQLITE_EMPTY.
    */
    assert( pC->isTable );
    pc = pOp->p2 - 1;
    assert( pC->rowidIsValid==0 );
    pC->seekResult = 0;
  }
  break;
}

/* Opcode: Sequence P1 P2 * * *
**
** Find the next available sequence number for cursor P1.
................................................................................
      memcpy(pC->pData, pData->z, pC->nData);
      pC->pData[pC->nData] = 0;
      pC->pData[pC->nData+1] = 0;
    }
    pC->nullRow = 0;
  }else{
    int nZero;
    int seekResult = ((pOp->p5 & OPFLAG_USESEEKRESULT) ? pC->seekResult : 0);
    if( pData->flags & MEM_Zero ){
      nZero = pData->u.nZero;
    }else{
      nZero = 0;
    }
    sqlite3BtreeSetCachedRowid(pC->pCursor, 0);
    rc = sqlite3BtreeInsert(pC->pCursor, 0, iKey,
                            pData->z, pData->n, nZero,
                            pOp->p5 & OPFLAG_APPEND, seekResult
    );
  }
  
  pC->rowidIsValid = 0;
  pC->deferredMoveto = 0;
  pC->cacheStatus = CACHE_STALE;

  /* Invoke the update-hook if required. */
................................................................................
  break;
}

/* Opcode: Rowid P1 P2 * * *
**
** Store in register P2 an integer which is the key of the table entry that
** P1 is currently point to.
**
** P1 can be either an ordinary table or a virtual table.  There used to
** be a separate OP_VRowid opcode for use with virtual tables, but this
** one opcode now works for both table types.
*/
case OP_Rowid: {                 /* out2-prerelease */
  int i = pOp->p1;
  VdbeCursor *pC;
  i64 v;

  assert( i>=0 && i<p->nCursor );
  pC = p->apCsr[i];
  assert( pC!=0 );
  if( pC->nullRow ){
    /* Do nothing so that reg[P2] remains NULL */
    break;
  }else if( pC->deferredMoveto ){
    v = pC->movetoTarget;
  }else if( pC->pseudoTable ){
    v = keyToInt(pC->iKey);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  }else if( pC->pVtabCursor ){
    sqlite3_vtab *pVtab;
    const sqlite3_module *pModule;
    pVtab = pC->pVtabCursor->pVtab;
    pModule = pVtab->pModule;
    assert( pModule->xRowid );
    if( sqlite3SafetyOff(db) ) goto abort_due_to_misuse;
    rc = pModule->xRowid(pC->pVtabCursor, &v);
    sqlite3DbFree(db, p->zErrMsg);
    p->zErrMsg = pVtab->zErrMsg;
    pVtab->zErrMsg = 0;
    if( sqlite3SafetyOn(db) ) goto abort_due_to_misuse;
#endif /* SQLITE_OMIT_VIRTUALTABLE */
  }else{
    rc = sqlite3VdbeCursorMoveto(pC);
    if( rc ) goto abort_due_to_error;
    if( pC->rowidIsValid ){
      v = pC->lastRowid;





    }else{
      assert( pC->pCursor!=0 );
      sqlite3BtreeKeySize(pC->pCursor, &v);
      v = keyToInt(v);
    }
  }
  pOut->u.i = v;
  MemSetTypeFlag(pOut, MEM_Int);
  break;
}

/* Opcode: NullRow P1 * * * *
................................................................................
    sqlite3_search_count++;
#endif
  }
  pC->rowidIsValid = 0;
  break;
}

/* Opcode: IdxInsert P1 P2 P3 * P5
**
** Register P2 holds a SQL index key made using the
** MakeRecord instructions.  This opcode writes that key
** into the index P1.  Data for the entry is nil.
**
** P3 is a flag that provides a hint to the b-tree layer that this
** insert is likely to be an append.
................................................................................
  assert( pIn2->flags & MEM_Blob );
  if( (pCrsr = (pC = p->apCsr[i])->pCursor)!=0 ){
    assert( pC->isTable==0 );
    rc = ExpandBlob(pIn2);
    if( rc==SQLITE_OK ){
      int nKey = pIn2->n;
      const char *zKey = pIn2->z;
      rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p3, 
          ((pOp->p5 & OPFLAG_USESEEKRESULT) ? pC->seekResult : 0)
      );
      assert( pC->deferredMoveto==0 );
      pC->cacheStatus = CACHE_STALE;
    }
  }
  break;
}

................................................................................
**
**