Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Remove the P3 operand from OP_IsNull since it was not being used. (CVS 6779) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 767ef1e4a1b31abef479368d9f960ecf |
| User & Date: | drh 2009-06-18 00:41:56 |
Context
|
2009-06-18
| ||
| 11:29 | Reduce the minimum usable page space to 480 byte from 500 bytes. (CVS 6780) check-in: db4fb835 user: drh tags: trunk | |
| 00:41 | Remove the P3 operand from OP_IsNull since it was not being used. (CVS 6779) check-in: 767ef1e4 user: drh tags: trunk | |
|
2009-06-17
| ||
| 22:50 | Avoid an assertion fault if an out-of-memory error occurs while trying to run the string-concatentation operator on a zero-blob. (This is an absurd thing to do, but even so, we still should not fault.) (CVS 6778) check-in: 0def0b76 user: drh tags: trunk | |
Changes
Changes to src/vdbe.c.
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
....
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
|
** ** 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 1.854 2009/06/17 22:50:42 drh Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" /* ** The following global variable is incremented every time a cursor ** moves, either by the OP_SeekXX, OP_Next, or OP_Prev opcodes. The test ................................................................................ } if( c ){ pc = pOp->p2-1; } break; } /* Opcode: IsNull P1 P2 P3 * * ** ** Jump to P2 if the value in register P1 is NULL. If P3 is greater ** than zero, then check all values reg(P1), reg(P1+1), ** reg(P1+2), ..., reg(P1+P3-1). */ case OP_IsNull: { /* same as TK_ISNULL, jump, in1 */ int n; n = pOp->p3; assert( pOp->p3==0 || pOp->p1>0 ); do{ if( (pIn1->flags & MEM_Null)!=0 ){ pc = pOp->p2 - 1; break; } pIn1++; }while( --n > 0 ); break; } /* Opcode: NotNull P1 P2 * * * ** ** Jump to P2 if the value in register P1 is not NULL. */ |
|
|
|
<
<
<
<
<
<
<
|
|
<
|
<
<
|
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
....
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
|
** ** 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 1.855 2009/06/18 00:41:56 drh Exp $ */ #include "sqliteInt.h" #include "vdbeInt.h" /* ** The following global variable is incremented every time a cursor ** moves, either by the OP_SeekXX, OP_Next, or OP_Prev opcodes. The test ................................................................................ } if( c ){ pc = pOp->p2-1; } break; } /* Opcode: IsNull P1 P2 * * * ** ** Jump to P2 if the value in register P1 is NULL. */ case OP_IsNull: { /* same as TK_ISNULL, jump, in1 */ if( (pIn1->flags & MEM_Null)!=0 ){ pc = pOp->p2 - 1; } break; } /* Opcode: NotNull P1 P2 * * * ** ** Jump to P2 if the value in register P1 is not NULL. */ |