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Overview
Comment: | Add code to convert between the various supported unicode encoding schemes. Untested at this point. (CVS 1315) |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
71260ff7f7030f56c292b43f83a213c6 |
User & Date: | danielk1977 2004-05-06 23:37:52.000 |
Context
2004-05-07
| ||
01:50 | Fix compilation problem in test5.c (CVS 1318) (check-in: 49c3c86c17 user: danielk1977 tags: trunk) | |
2004-05-06
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23:37 | Add code to convert between the various supported unicode encoding schemes. Untested at this point. (CVS 1315) (check-in: 71260ff7f7 user: danielk1977 tags: trunk) | |
2004-05-04
| ||
17:27 | Update test3.c to work with the new btree.c API. (CVS 1314) (check-in: bfb3234dc6 user: drh tags: trunk) | |
Changes
Changes to main.mk.
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51 52 53 54 55 56 57 | # This is how we compile # TCCX = $(TCC) $(OPTS) $(THREADSAFE) $(USLEEP) -I. -I$(TOP)/src # Object files for the SQLite library. # LIBOBJ = hash.o os.o pager.o random.o \ | | | 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | # This is how we compile # TCCX = $(TCC) $(OPTS) $(THREADSAFE) $(USLEEP) -I. -I$(TOP)/src # Object files for the SQLite library. # LIBOBJ = hash.o os.o pager.o random.o \ util.o tclsqlite.o utf.o LIBOBJ_ORIG = attach.o auth.o btree.o btree_rb.o build.o copy.o date.o delete.o \ expr.o func.o hash.o insert.o \ main.o opcodes.o os.o pager.o parse.o pragma.o printf.o random.o \ select.o table.o tokenize.o trigger.o update.o util.o \ vacuum.o vdbe.o vdbeaux.o where.o tclsqlite.o |
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117 118 119 120 121 122 123 124 125 126 127 128 129 130 | # Source code to the test files. # TESTSRC = \ $(TOP)/src/os.c \ $(TOP)/src/pager.c \ $(TOP)/src/test2.c \ $(TOP)/src/md5.c TESTSRC_ORIG = \ $(TOP)/src/btree.c \ $(TOP)/src/func.c \ $(TOP)/src/os.c \ $(TOP)/src/pager.c \ | > | 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | # Source code to the test files. # TESTSRC = \ $(TOP)/src/os.c \ $(TOP)/src/pager.c \ $(TOP)/src/test2.c \ $(TOP)/src/test5.c \ $(TOP)/src/md5.c TESTSRC_ORIG = \ $(TOP)/src/btree.c \ $(TOP)/src/func.c \ $(TOP)/src/os.c \ $(TOP)/src/pager.c \ |
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225 226 227 228 229 230 231 232 233 234 235 236 237 238 | awk '{printf "#define %-30s %3d\n", $$2, ++cnt}' >>opcodes.h os.o: $(TOP)/src/os.c $(HDR) $(TCCX) -c $(TOP)/src/os.c parse.o: parse.c $(HDR) $(TCCX) -c parse.c parse.h: parse.c parse.c: $(TOP)/src/parse.y lemon cp $(TOP)/src/parse.y . ./lemon parse.y | > > > | 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 | awk '{printf "#define %-30s %3d\n", $$2, ++cnt}' >>opcodes.h os.o: $(TOP)/src/os.c $(HDR) $(TCCX) -c $(TOP)/src/os.c parse.o: parse.c $(HDR) $(TCCX) -c parse.c utf.o: $(TOP)/src/utf.c $(HDR) $(TCCX) -c $(TOP)/src/utf.c parse.h: parse.c parse.c: $(TOP)/src/parse.y lemon cp $(TOP)/src/parse.y . ./lemon parse.y |
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Changes to src/sqliteInt.h.
1 2 3 4 5 6 7 8 9 10 11 12 13 | /* ** 2001 September 15 ** ** 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. ** ************************************************************************* ** Internal interface definitions for SQLite. ** | | | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | /* ** 2001 September 15 ** ** 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. ** ************************************************************************* ** Internal interface definitions for SQLite. ** ** @(#) $Id: sqliteInt.h,v 1.222 2004/05/06 23:37:53 danielk1977 Exp $ */ #include "config.h" #include "sqlite.h" #include "hash.h" #include "parse.h" #include <stdio.h> #include <stdlib.h> |
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1264 1265 1266 1267 1268 1269 1270 | int sqliteFixSelect(DbFixer*, Select*); int sqliteFixExpr(DbFixer*, Expr*); int sqliteFixExprList(DbFixer*, ExprList*); int sqliteFixTriggerStep(DbFixer*, TriggerStep*); double sqliteAtoF(const char *z, const char **); char *sqlite_snprintf(int,char*,const char*,...); int sqliteFitsIn32Bits(const char *); | > > > > > > > | 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 | int sqliteFixSelect(DbFixer*, Select*); int sqliteFixExpr(DbFixer*, Expr*); int sqliteFixExprList(DbFixer*, ExprList*); int sqliteFixTriggerStep(DbFixer*, TriggerStep*); double sqliteAtoF(const char *z, const char **); char *sqlite_snprintf(int,char*,const char*,...); int sqliteFitsIn32Bits(const char *); unsigned char *sqlite3utf16to8(const void *pData, int N); void *sqlite3utf8to16be(const unsigned char *pIn, int N); void *sqlite3utf8to16le(const unsigned char *pIn, int N); void sqlite3utf16to16le(void *pData, int N); void sqlite3utf16to16be(void *pData, int N); |
Changes to src/tclsqlite.c.
1 2 3 4 5 6 7 8 9 10 11 12 13 | /* ** 2001 September 15 ** ** 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. ** ************************************************************************* ** A TCL Interface to SQLite ** | | | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | /* ** 2001 September 15 ** ** 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. ** ************************************************************************* ** A TCL Interface to SQLite ** ** $Id: tclsqlite.c,v 1.61 2004/05/06 23:37:53 danielk1977 Exp $ */ #ifndef NO_TCL /* Omit this whole file if TCL is unavailable */ #include "sqliteInt.h" #include "tcl.h" #include <stdlib.h> #include <string.h> |
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1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 | /* Sqlite_Init(interp); */ #ifdef SQLITE_TEST { extern int Sqlitetest1_Init(Tcl_Interp*); extern int Sqlitetest2_Init(Tcl_Interp*); extern int Sqlitetest3_Init(Tcl_Interp*); extern int Sqlitetest4_Init(Tcl_Interp*); extern int Md5_Init(Tcl_Interp*); /* Sqlitetest1_Init(interp); */ Sqlitetest2_Init(interp); /* Sqlitetest3_Init(interp); */ /* Sqlitetest4_Init(interp); */ Md5_Init(interp); } #endif if( argc>=2 ){ int i; Tcl_SetVar(interp,"argv0",argv[1],TCL_GLOBAL_ONLY); Tcl_SetVar(interp,"argv", "", TCL_GLOBAL_ONLY); | > > | 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 | /* Sqlite_Init(interp); */ #ifdef SQLITE_TEST { extern int Sqlitetest1_Init(Tcl_Interp*); extern int Sqlitetest2_Init(Tcl_Interp*); extern int Sqlitetest3_Init(Tcl_Interp*); extern int Sqlitetest4_Init(Tcl_Interp*); extern int Sqlitetest5_Init(Tcl_Interp*); extern int Md5_Init(Tcl_Interp*); /* Sqlitetest1_Init(interp); */ Sqlitetest2_Init(interp); /* Sqlitetest3_Init(interp); */ /* Sqlitetest4_Init(interp); */ Sqlitetest5_Init(interp); Md5_Init(interp); } #endif if( argc>=2 ){ int i; Tcl_SetVar(interp,"argv0",argv[1],TCL_GLOBAL_ONLY); Tcl_SetVar(interp,"argv", "", TCL_GLOBAL_ONLY); |
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Added src/test5.c.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | /* ** 2001 September 15 ** ** 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. ** ************************************************************************* ** Code for testing the utf.c module in SQLite. This code ** is not included in the SQLite library. It is used for automated ** testing of the SQLite library. ** ** $Id: */ #include "sqliteInt.h" #include "tcl.h" #include <stdlib.h> #include <string.h> /* ** Return the number of bytes up to and including the first \u0000 ** character in *pStr. */ static int utf16_length(const unsigned char *pZ){ const unsigned char *pC1 = pZ; const unsigned char *pC2 = pZ+1; while( *pC1 || *pC2 ){ pC1 += 2; pC2 += 2; } return (pC1-pZ)+2; } static int sqlite_utf8to16le( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ unsigned char *out; unsigned char *in; Tcl_Obj *res; if( objc!=2 ){ Tcl_AppendResult(interp, "wrong # args: should be \"", Tcl_GetStringFromObj(objv[0], 0), "<utf-8 encoded-string>", 0); return TCL_ERROR; } in = Tcl_GetByteArrayFromObj(objv[1], 0); out = (unsigned char *)sqlite3utf8to16le(in, -1); res = Tcl_NewByteArrayObj(out, utf16_length(ret)); sqliteFree(out); Tcl_SetObjResult(interp, res); return TCL_OK; } static int sqlite_utf8to16be( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ unsigned char *out; unsigned char *in; Tcl_Obj *res; if( objc!=2 ){ Tcl_AppendResult(interp, "wrong # args: should be \"", Tcl_GetStringFromObj(objv[0], 0), "<utf-8 encoded-string>", 0); return TCL_ERROR; } in = Tcl_GetByteArrayFromObj(objv[1], 0); out = (unsigned char *)sqlite3utf8to16be(in, -1); res = Tcl_NewByteArrayObj(out, utf16_length(ret)); sqliteFree(out); Tcl_SetObjResult(interp, res); return TCL_OK; } static int sqlite_utf16to16le( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ unsigned char *out; unsigned char *in; int in_len; Tcl_Obj *res; if( objc!=2 ){ Tcl_AppendResult(interp, "wrong # args: should be \"", Tcl_GetStringFromObj(objv[0], 0), "<utf-16 encoded-string>", 0); return TCL_ERROR; } in = Tcl_GetByteArrayFromObj(objv[1], &in_len); out = (unsigned char *)sqliteMalloc(in_len); memcpy(out, in, in_len); sqlite3utf16to16le(out, -1); res = Tcl_NewByteArrayObj(out, utf16_length(ret)); sqliteFree(out); Tcl_SetObjResult(interp, res); return TCL_OK; } static int sqlite_utf16to16be( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ unsigned char *out; unsigned char *in; int in_len; Tcl_Obj *res; if( objc!=2 ){ Tcl_AppendResult(interp, "wrong # args: should be \"", Tcl_GetStringFromObj(objv[0], 0), "<utf-16 encoded-string>", 0); return TCL_ERROR; } in = Tcl_GetByteArrayFromObj(objv[1], &in_len); out = (unsigned char *)sqliteMalloc(in_len); memcpy(out, in, in_len); sqlite3utf16to16be(out, -1); res = Tcl_NewByteArrayObj(out, utf16_length(ret)); sqliteFree(out); Tcl_SetObjResult(interp, res); return TCL_OK; } static int sqlite_utf16to8( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ unsigned char *out; unsigned char *in; Tcl_Obj *res; if( objc!=2 ){ Tcl_AppendResult(interp, "wrong # args: should be \"", Tcl_GetStringFromObj(objv[0], 0), "<utf-16 encoded-string>", 0); return TCL_ERROR; } in = Tcl_GetByteArrayFromObj(objv[1], 0); out = sqlite3utf16to8(in, -1); res = Tcl_NewByteArrayObj(out, strlen(ret)); sqliteFree(out); Tcl_SetObjResult(interp, res); return TCL_OK; } /* ** Register commands with the TCL interpreter. */ int Sqlitetest5_Init(Tcl_Interp *interp){ static struct { char *zName; Tcl_CmdProc *xProc; } aCmd[] = { { "sqlite_utf16to8", (Tcl_CmdProc*)sqlite_utf16to8 }, { "sqlite_utf8to16le", (Tcl_CmdProc*)sqlite_utf8to16le }, { "sqlite_utf8to16be", (Tcl_CmdProc*)sqlite_utf8to16be }, { "sqlite_utf16to16le", (Tcl_CmdProc*)sqlite_utf16to16le }, { "sqlite_utf16to16be", (Tcl_CmdProc*)sqlite_utf16to16be } }; int i; for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){ Tcl_CreateCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0); } return TCL_OK; } |
Changes to src/utf.c.
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8 9 10 11 12 13 14 | ** 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. ** | | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | > > > > > > | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > < | > > > > > > > > > | < < < < > < | | 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 | ** 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 1.2 2004/05/06 23:37:53 danielk1977 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 ** 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx 000uuuuu zzzzyyyy yyxxxxxx ** ** ** Notes on UTF-16: (with wwww+1==uuuuu) ** ** Word-0 Word-1 Value ** 110110wwwwxxxxxx 110111yyyyyyyyyy 000uuuuu xxxxxxyy yyyyyyyy ** xxxxxxxxyyyyyyyy 00000000 xxxxxxxx yyyyyyyy ** ** ** BOM or Byte Order Mark: ** 0xff 0xfe little-endian utf-16 follows ** 0xfe 0xff big-endian utf-16 follows ** ** ** Handling of malformed strings: ** ** SQLite accepts and processes malformed strings without an error wherever ** possible. However this is not possible when converting between UTF-8 and ** UTF-16. ** ** When converting malformed UTF-8 strings to UTF-16, one instance of the ** replacement character U+FFFD for each byte that cannot be interpeted as ** part of a valid unicode character. ** ** When converting malformed UTF-16 strings to UTF-8, one instance of the ** replacement character U+FFFD for each pair of bytes that cannot be ** interpeted as part of a valid unicode character. */ #include <assert.h> #include <unistd.h> #include "sqliteInt.h" typedef struct UtfString UtfString; struct UtfString { unsigned char *pZ; /* Raw string data */ int n; /* Allocated length of pZ in bytes */ int c; /* Number of pZ bytes already read or written */ }; /* TODO: Implement this macro in os.h. It should be 1 on big-endian ** machines, and 0 on little-endian. */ #define SQLITE3_NATIVE_BIGENDIAN 0 #if SQLITE3_NATIVE_BIGENDIAN == 1 #define BOM_BIGENDIAN 0x0000FFFE #define BOM_LITTLEENDIAN 0x0000FEFF #else #define BOM_BIGENDIAN 0x0000FEFF #define BOM_LITTLEENDIAN 0x0000FFFE #endif /* ** These two macros are used to interpret the first two bytes of the ** unsigned char array pZ as a 16-bit unsigned int. BE16() for a big-endian ** interpretation, LE16() for little-endian. */ #define BE16(pZ) (((u16)((pZ)[0])<<8) + (u16)((pZ)[1])) #define LE16(pZ) (((u16)((pZ)[1])<<8) + (u16)((pZ)[0])) /* ** READ_16 interprets the first two bytes of the unsigned char array pZ ** as a 16-bit unsigned int. If big_endian is non-zero the intepretation ** is big-endian, otherwise little-endian. */ #define READ_16(pZ,big_endian) (big_endian?BE16(pZ):LE16(pZ)) /* ** Read the BOM from the start of *pStr, if one is present. Return zero ** for little-endian, non-zero for big-endian. If no BOM is present, return ** the machines native byte order. ** ** Return values: ** 1 -> big-endian string ** 0 -> little-endian string */ static int readUtf16Bom(UtfString *pStr){ /* The BOM must be the first thing read from the string */ assert( pStr->c==0 ); /* If the string data consists of 1 byte or less, the BOM will make no ** difference anyway. In this case just fall through to the default case ** and return the native byte-order for this machine. ** ** Otherwise, check the first 2 bytes of the string to see if a BOM is ** present. */ if( pStr->n>1 ){ u32 bom = BE16(pStr->pZ); if( bom==BOM_BIGENDIAN ){ pStr->c = 2; return 1; } if( bom==BOM_LITTLEENDIAN ){ pStr->c = 2; return 0; } } return SQLITE3_NATIVE_BIGENDIAN; } /* ** Read a single unicode character from the UTF-8 encoded string *pStr. The ** value returned is a unicode scalar value. In the case of malformed ** strings, the unicode replacement character U+FFFD may be returned. */ static u32 readUtf8(UtfString *pStr){ struct Utf8TblRow { u8 b1_mask; u8 b1_masked_val; u8 b1_value_mask; int trailing_bytes; }; static const struct Utf8TblRow utf8tbl[] = { { 0x80, 0x00, 0x7F, 0 }, { 0xE0, 0xC0, 0x1F, 1 }, { 0xF0, 0xE0, 0x0F, 2 }, { 0xF8, 0xF0, 0x0E, 3 }, { 0, 0, 0, 0} }; u8 b1; /* First byte of the potentially multi-byte utf-8 character */ u32 ret = 0; /* Return value */ int ii; struct Utf8TblRow const *pRow; pRow = &(utf8tbl[0]); b1 = pStr->pZ[pStr->c]; pStr->c++; while( pRow->b1_mask && (b1&pRow->b1_mask)!=pRow->b1_masked_val ){ pRow++; } if( !pRow->b1_mask ){ return 0xFFFD; } ret = (u32)(b1&pRow->b1_value_mask); for( ii=0; ii<pRow->trailing_bytes; ii++ ){ u8 b = pStr->pZ[pStr->c+ii]; if( (b&0xC0)!=0x80 ){ return 0xFFFD; } ret = (ret<<6) + (u32)(b&0x3F); } pStr->c += pRow->trailing_bytes; return ret; } /* ** Write the unicode character 'code' to the string pStr using UTF-8 ** encoding. SQLITE_NOMEM may be returned if sqlite3Malloc() fails. */ static int writeUtf8(UtfString *pStr, u32 code){ struct Utf8WriteTblRow { u32 max_code; int trailing_bytes; u8 b1_and_mask; u8 b1_or_mask; }; static const struct Utf8WriteTblRow utf8tbl[] = { {0x0000007F, 0, 0x7F, 0x00}, {0x000007FF, 1, 0xDF, 0xC0}, {0x0000FFFF, 2, 0xEF, 0xE0}, {0x0010FFFF, 3, 0xF7, 0xF0}, {0x00000000, 0, 0x00, 0x00} }; static const struct Utf8WriteTblRow *pRow = &utf8tbl[0]; while( code<=pRow->max_code ){ assert( pRow->max_code ); pRow++; } /* Ensure there is enough room left in the output buffer to write ** this UTF-8 character. */ assert( (pStr->n-pStr->c)>=(pRow->trailing_bytes+1) ); /* Write the UTF-8 encoded character to pStr. All cases below are ** intentionally fall-through. */ switch( pRow->trailing_bytes ){ case 3: pStr->pZ[pStr->c+3] = (((u8)code)&0x3F)|0x80; code = code>>6; case 2: pStr->pZ[pStr->c+2] = (((u8)code)&0x3F)|0x80; code = code>>6; case 1: pStr->pZ[pStr->c+1] = (((u8)code)&0x3F)|0x80; code = code>>6; case 0: pStr->pZ[pStr->c] = (((u8)code)&(pRow->b1_and_mask))|(pRow->b1_or_mask); } pStr->c += (pRow->trailing_bytes + 1); return 0; } /* ** Read a single unicode character from the UTF-16 encoded string *pStr. The ** value returned is a unicode scalar value. In the case of malformed ** strings, the unicode replacement character U+FFFD may be returned. ** ** If big_endian is true, the string is assumed to be UTF-16BE encoded. ** Otherwise, it is UTF-16LE encoded. */ static u32 readUtf16(UtfString *pStr, int big_endian){ u32 code_point; /* the first code-point in the character */ /* If there is only one byte of data left in the string, return the ** replacement character. */ if( (pStr->n-pStr->c)==1 ){ pStr->c++; return (int)0xFFFD; } code_point = READ_16(&(pStr->pZ[pStr->c]), big_endian); pStr->c += 2; /* If this is a non-surrogate code-point, just cast it to an int and ** return the code-point value. */ if( code_point<0xD800 || code_point>0xE000 ){ return code_point; } /* If this is a trailing surrogate code-point, then the string is ** malformed; return the replacement character. */ if( code_point>0xDBFF ){ return 0xFFFD; } /* The code-point just read is a leading surrogate code-point. If their ** is not enough data left or the next code-point is not a trailing ** surrogate, return the replacement character. */ if( (pStr->n-pStr->c)>1 ){ u32 code_point2 = READ_16(&pStr->pZ[pStr->c], big_endian); if( code_point2<0xDC00 || code_point>0xDFFF ){ return 0xFFFD; } pStr->c += 2; return ( (((code_point&0x03C0)+0x0040)<<16) + /* uuuuu */ ((code_point&0x003F)<<10) + /* xxxxxx */ (code_point2&0x03FF) /* yy yyyyyyyy */ ); }else{ return (int)0xFFFD; } /* not reached */ } static int writeUtf16(UtfString *pStr, int code, int big_endian){ int bytes; unsigned char *hi_byte; unsigned char *lo_byte; bytes = (code>0x0000FFFF?4:2); /* Ensure there is enough room left in the output buffer to write ** this UTF-8 character. */ assert( (pStr->n-pStr->c)>=bytes ); /* Initialise hi_byte and lo_byte to point at the locations into which ** the MSB and LSB of the (first) 16-bit unicode code-point written for ** this character. */ hi_byte = (big_endian?&pStr->pZ[pStr->c]:&pStr->pZ[pStr->c+1]); lo_byte = (big_endian?&pStr->pZ[pStr->c+1]:&pStr->pZ[pStr->c]); if( bytes==2 ){ *hi_byte = (u8)((code&0x0000FF00)>>8); *lo_byte = (u8)(code&0x000000FF); }else{ u32 wrd; wrd = ((((code&0x001F0000)-0x00010000)+(code&0x0000FC00))>>10)|0x0000D800; *hi_byte = (u8)((wrd&0x0000FF00)>>8); *lo_byte = (u8)(wrd&0x000000FF); wrd = (code&0x000003FF)|0x0000DC00; *(hi_byte+2) = (u8)((wrd&0x0000FF00)>>8); *(lo_byte+2) = (u8)(wrd&0x000000FF); } pStr->c += bytes; return 0; } /* ** Return the number of bytes up to (but not including) the first \u0000 ** character in *pStr. */ static int utf16Bytelen(const unsigned char *pZ){ const unsigned char *pC1 = pZ; const unsigned char *pC2 = pZ+1; while( *pC1 || *pC2 ){ pC1 += 2; pC2 += 2; } return pC1-pZ; } /* ** Convert a string in UTF-16 native byte (or with a Byte-order-mark or ** "BOM") into a UTF-8 string. The UTF-8 string is written into space ** obtained from sqlite3Malloc() and must be released by the calling function. ** ** The parameter N is the number of bytes in the UTF-16 string. If N is ** negative, the entire string up to the first \u0000 character is translated. ** ** The returned UTF-8 string is always \000 terminated. */ unsigned char *sqlite3utf16to8(const void *pData, int N){ UtfString in; UtfString out; int big_endian; out.pZ = 0; in.pZ = (unsigned char *)pData; in.n = N; in.c = 0; if( in.n<0 ){ in.n = utf16Bytelen(in.pZ); } /* A UTF-8 encoding of a unicode string can require at most 1.5 times as ** much space to store as the same string encoded using UTF-16. Allocate ** this now. */ out.n = (in.n*1.5) + 1; out.pZ = sqliteMalloc(in.n); if( !out.pZ ){ return 0; } out.c = 0; big_endian = readUtf16Bom(&in); while( in.c<in.n ){ writeUtf8(&out, readUtf16(&in, big_endian)); } /* Add the NULL-terminator character */ assert( out.c<out.n ); out.pZ[out.c] = 0x00; return out.pZ; } static void *utf8toUtf16(const unsigned char *pIn, int N, int big_endian){ UtfString in; UtfString out; in.pZ = (unsigned char *)pIn; in.n = N; in.c = 0; if( in.n<0 ){ in.n = strlen(in.pZ); } /* A UTF-16 encoding of a unicode string can require at most twice as ** much space to store as the same string encoded using UTF-8. Allocate ** this now. */ out.n = (in.n*2) + 2; out.pZ = sqliteMalloc(in.n); if( !out.pZ ){ return 0; } out.c = 0; while( in.c<in.n ){ writeUtf16(&out, readUtf8(&in), big_endian); } /* Add the NULL-terminator character */ assert( (out.c+1)<out.n ); out.pZ[out.c] = 0x00; out.pZ[out.c+1] = 0x00; return out.pZ; } /* ** Translate UTF-8 to UTF-16BE or UTF-16LE */ void *sqlite3utf8to16be(const unsigned char *pIn, int N){ return utf8toUtf16(pIn, N, 1); } void *sqlite3utf8to16le(const unsigned char *pIn, int N){ return utf8toUtf16(pIn, N, 0); } /* ** This routine does the work for sqlite3utf16to16le() and ** sqlite3utf16to16be(). If big_endian is 1 the input string is ** transformed in place to UTF-16BE encoding. If big_endian is 0 then ** the input is transformed to UTF-16LE. ** ** Unless the first two bytes of the input string is a BOM, the input is ** assumed to be UTF-16 encoded using the machines native byte ordering. */ static void utf16to16(void *pData, int N, int big_endian){ UtfString inout; inout.pZ = (unsigned char *)pData; inout.c = 0; inout.n = N; if( inout.n<0 ){ inout.n = utf16Bytelen(inout.pZ); } if( readUtf16Bom(&inout)!=big_endian ){ swab(&inout.pZ[inout.c], inout.pZ, inout.n-inout.c); }else if( inout.c ){ memmove(inout.pZ, &inout.pZ[inout.c], inout.n-inout.c); } } /* ** Convert a string in UTF-16 native byte or with a BOM into a UTF-16LE ** string. The conversion occurs in-place. The output overwrites the ** input. N bytes are converted. If N is negative everything is converted ** up to the first \u0000 character. ** ** If the native byte order is little-endian and there is no BOM, then ** this routine is a no-op. If there is a BOM at the start of the string, ** it is removed. ** ** Translation from UTF-16LE to UTF-16BE and back again is accomplished ** using the library function swab(). */ void sqlite3utf16to16le(void *pData, int N){ utf16to16(pData, N, 0); } /* ** Convert a string in UTF-16 native byte or with a BOM into a UTF-16BE ** string. The conversion occurs in-place. The output overwrites the ** input. N bytes are converted. If N is negative everything is converted ** up to the first \u0000 character. ** ** If the native byte order is little-endian and there is no BOM, then ** this routine is a no-op. If there is a BOM at the start of the string, ** it is removed. ** ** Translation from UTF-16LE to UTF-16BE and back again is accomplished ** using the library function swab(). */ void sqlite3utf16to16be(void *pData, int N){ utf16to16(pData, N, 1); } |