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Overview
| Comment: | Publish routines sqlite4_stricmp() and sqlite4_strnicmp() that do simple unicode case folding. Use these routines for all internal case-insensitive string comparisons. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
19e9278b9c3fb88d2c091d091d95074c |
| User & Date: | drh 2013-01-31 05:27:14.727 |
Context
|
2013-01-31
| ||
| 05:36 | Change all occurrences of sqlite4StrICmp to sqlite4_stricmp and change sqlite4StrNICmp to sqlite4_strnicmp. check-in: b6d0a62048 user: drh tags: trunk | |
| 05:27 | Publish routines sqlite4_stricmp() and sqlite4_strnicmp() that do simple unicode case folding. Use these routines for all internal case-insensitive string comparisons. check-in: 19e9278b9c user: drh tags: trunk | |
|
2013-01-28
| ||
| 08:56 | Merge block-redirects branch with trunk. This changes the lsm file format. check-in: 647229e983 user: dan tags: trunk | |
Changes
Changes to src/main.c.
| ︙ | ︙ | |||
637 638 639 640 641 642 643 |
** At the moment there is only a UTF-8 implementation.
*/
static int collNocaseCmp(
void *NotUsed,
int nKey1, const void *pKey1,
int nKey2, const void *pKey2
){
| | | | 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 |
** At the moment there is only a UTF-8 implementation.
*/
static int collNocaseCmp(
void *NotUsed,
int nKey1, const void *pKey1,
int nKey2, const void *pKey2
){
int r = sqlite4_strnicmp(
(const char *)pKey1, (const char *)pKey2, (nKey1<nKey2)?nKey1:nKey2);
UNUSED_PARAMETER(NotUsed);
if( 0==r ){
r = nKey1-nKey2;
}
return r;
}
static int collNocaseMkKey(
void *NotUsed,
int nIn, const void *pKey1,
int nOut, void *pKey2
){
if( nOut>=nIn ){
int i;
u8 *aIn = (u8 *)pKey1;
u8 *aOut = (u8 *)pKey2;
for(i=0; i<nIn; i++){
aOut[i] = sqlite4_tolower(aIn[i]);
}
}
return nIn;
}
/*
** Return the ROWID of the most recent insert
|
| ︙ | ︙ |
Changes to src/sqliteInt.h.
| ︙ | ︙ | |||
2550 2551 2552 2553 2554 2555 2556 | # define sqlite4Isxdigit(x) isxdigit((unsigned char)(x)) # define sqlite4Tolower(x) tolower((unsigned char)(x)) #endif /* ** Internal function prototypes */ | < > | 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 | # define sqlite4Isxdigit(x) isxdigit((unsigned char)(x)) # define sqlite4Tolower(x) tolower((unsigned char)(x)) #endif /* ** Internal function prototypes */ int sqlite4Strlen30(const char*); #define sqlite4StrICmp sqlite4_stricmp #define sqlite4StrNICmp sqlite4_strnicmp int sqlite4MallocInit(sqlite4_env*); void sqlite4MallocEnd(sqlite4_env*); void *sqlite4Malloc(sqlite4_env*, int); void *sqlite4MallocZero(sqlite4_env*, int); void *sqlite4DbMallocZero(sqlite4*, int); |
| ︙ | ︙ |
Changes to src/utf.c.
| ︙ | ︙ | |||
183 184 185 186 187 188 189 |
|| (c&0xFFFFFFFE)==0xFFFE ){ c = 0xFFFD; }
}
*pzNext = zIn;
return c;
}
| > > > > > > > > > > > > > > > > > | > > > > > > > > > > > > > > > > | 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 |
|| (c&0xFFFFFFFE)==0xFFFE ){ c = 0xFFFD; }
}
*pzNext = zIn;
return c;
}
/*
** Versions of stricmp and strnicmp that work with (simple) unicode
** case mapping.
*/
int sqlite4_stricmp(const char *zLeft, const char *zRight){
unsigned char *a, *b;
unsigned int ac, bc;
int x;
a = (unsigned char *)zLeft;
b = (unsigned char *)zRight;
do{
READ_UTF8(a, 0, ac);
ac = sqlite4_tolower(ac);
READ_UTF8(b, 0, bc);
bc = sqlite4_tolower(bc);
}while( ac==bc && ac!=0 );
return ac - bc;
}
int sqlite4_strnicmp(const char *zLeft, const char *zRight, int N){
unsigned char *a, *b, *aTerm, *bTerm;
unsigned int ac, bc;
int x;
a = (unsigned char *)zLeft;
b = (unsigned char *)zRight;
aTerm = a + N;
bTerm = b + N;
do{
READ_UTF8(a, aTerm, ac);
ac = sqlite4_tolower(ac);
READ_UTF8(b, bTerm, bc);
bc = sqlite4_tolower(bc);
}while( ac==bc && ac!=0 && a<aTerm );
return ac - bc;
}
/*
** If the TRANSLATE_TRACE macro is defined, the value of each Mem is
** printed on stderr on the way into and out of sqlite4VdbeMemTranslate().
*/
/* #define TRANSLATE_TRACE 1 */
|
| ︙ | ︙ | |||
554 555 556 557 558 559 560 |
READ_UTF16BE(z, 1, c);
assert( c==i );
assert( (z-zBuf)==n );
}
}
#endif /* SQLITE4_TEST */
#endif /* SQLITE4_OMIT_UTF16 */
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READ_UTF16BE(z, 1, c);
assert( c==i );
assert( (z-zBuf)==n );
}
}
#endif /* SQLITE4_TEST */
#endif /* SQLITE4_OMIT_UTF16 */
/*
** Return true if the argument corresponds to a unicode codepoint
** classified as either a letter or a number. Otherwise false.
**
** The results are undefined if the value passed to this function
** is less than zero.
*/
int sqlite4_isalnum(int c){
/* Each unsigned integer in the following array corresponds to a contiguous
** range of unicode codepoints that are not either letters or numbers (i.e.
** codepoints for which this function should return 0).
**
** The most significant 22 bits in each 32-bit value contain the first
** codepoint in the range. The least significant 10 bits are used to store
** the size of the range (always at least 1). In other words, the value
** ((C<<22) + N) represents a range of N codepoints starting with codepoint
** C. It is not possible to represent a range larger than 1023 codepoints
** using this format.
*/
const static unsigned int aEntry[] = {
0x00000030, 0x0000E807, 0x00016C06, 0x0001EC2F, 0x0002AC07,
0x0002D001, 0x0002D803, 0x0002EC01, 0x0002FC01, 0x00035C01,
0x0003DC01, 0x000B0804, 0x000B480E, 0x000B9407, 0x000BB401,
0x000BBC81, 0x000DD401, 0x000DF801, 0x000E1002, 0x000E1C01,
0x000FD801, 0x00120808, 0x00156806, 0x00162402, 0x00163C01,
0x00164437, 0x0017CC02, 0x00180005, 0x00181816, 0x00187802,
0x00192C15, 0x0019A804, 0x0019C001, 0x001B5001, 0x001B580F,
0x001B9C07, 0x001BF402, 0x001C000E, 0x001C3C01, 0x001C4401,
0x001CC01B, 0x001E980B, 0x001FAC09, 0x001FD804, 0x00205804,
0x00206C09, 0x00209403, 0x0020A405, 0x0020C00F, 0x00216403,
0x00217801, 0x0023901B, 0x00240004, 0x0024E803, 0x0024F812,
0x00254407, 0x00258804, 0x0025C001, 0x00260403, 0x0026F001,
0x0026F807, 0x00271C02, 0x00272C03, 0x00275C01, 0x00278802,
0x0027C802, 0x0027E802, 0x00280403, 0x0028F001, 0x0028F805,
0x00291C02, 0x00292C03, 0x00294401, 0x0029C002, 0x0029D401,
0x002A0403, 0x002AF001, 0x002AF808, 0x002B1C03, 0x002B2C03,
0x002B8802, 0x002BC002, 0x002C0403, 0x002CF001, 0x002CF807,
0x002D1C02, 0x002D2C03, 0x002D5802, 0x002D8802, 0x002DC001,
0x002E0801, 0x002EF805, 0x002F1803, 0x002F2804, 0x002F5C01,
0x002FCC08, 0x00300403, 0x0030F807, 0x00311803, 0x00312804,
0x00315402, 0x00318802, 0x0031FC01, 0x00320802, 0x0032F001,
0x0032F807, 0x00331803, 0x00332804, 0x00335402, 0x00338802,
0x00340802, 0x0034F807, 0x00351803, 0x00352804, 0x00355C01,
0x00358802, 0x0035E401, 0x00360802, 0x00372801, 0x00373C06,
0x00375801, 0x00376008, 0x0037C803, 0x0038C401, 0x0038D007,
0x0038FC01, 0x00391C09, 0x00396802, 0x003AC401, 0x003AD006,
0x003AEC02, 0x003B2006, 0x003C041F, 0x003CD00C, 0x003DC417,
0x003E340B, 0x003E6424, 0x003EF80F, 0x003F380D, 0x0040AC14,
0x00412806, 0x00415804, 0x00417803, 0x00418803, 0x00419C07,
0x0041C404, 0x0042080C, 0x00423C01, 0x00426806, 0x0043EC01,
0x004D740C, 0x004E400A, 0x00500001, 0x0059B402, 0x005A0001,
0x005A6C02, 0x005BAC03, 0x005C4803, 0x005CC805, 0x005D4802,
0x005DC802, 0x005ED023, 0x005F6004, 0x005F7401, 0x0060000F,
0x0062A401, 0x0064800C, 0x0064C00C, 0x00650001, 0x00651002,
0x0066C011, 0x00672002, 0x00677822, 0x00685C05, 0x00687802,
0x0069540A, 0x0069801D, 0x0069FC01, 0x006A8007, 0x006AA006,
0x006C0005, 0x006CD011, 0x006D6823, 0x006E0003, 0x006E840D,
0x006F980E, 0x006FF004, 0x00709014, 0x0070EC05, 0x0071F802,
0x00730008, 0x00734019, 0x0073B401, 0x0073C803, 0x00770027,
0x0077F004, 0x007EF401, 0x007EFC03, 0x007F3403, 0x007F7403,
0x007FB403, 0x007FF402, 0x00800065, 0x0081A806, 0x0081E805,
0x00822805, 0x0082801A, 0x00834021, 0x00840002, 0x00840C04,
0x00842002, 0x00845001, 0x00845803, 0x00847806, 0x00849401,
0x00849C01, 0x0084A401, 0x0084B801, 0x0084E802, 0x00850005,
0x00852804, 0x00853C01, 0x00864264, 0x00900027, 0x0091000B,
0x0092704E, 0x00940200, 0x009C0475, 0x009E53B9, 0x00AD400A,
0x00B39406, 0x00B3BC03, 0x00B3E404, 0x00B3F802, 0x00B5C001,
0x00B5FC01, 0x00B7804F, 0x00B8C00C, 0x00BA001A, 0x00BA6C59,
0x00BC00D6, 0x00BFC00C, 0x00C00005, 0x00C02019, 0x00C0A807,
0x00C0D802, 0x00C0F403, 0x00C26404, 0x00C28001, 0x00C3EC01,
0x00C64002, 0x00C6580A, 0x00C70024, 0x00C8001F, 0x00C8A81E,
0x00C94001, 0x00C98020, 0x00CA2827, 0x00CB003F, 0x00CC0100,
0x01370040, 0x02924037, 0x0293F802, 0x02983403, 0x0299BC10,
0x029A7C01, 0x029BC008, 0x029C0017, 0x029C8002, 0x029E2402,
0x02A00801, 0x02A01801, 0x02A02C01, 0x02A08C09, 0x02A0D804,
0x02A1D004, 0x02A20002, 0x02A2D011, 0x02A33802, 0x02A38012,
0x02A3E003, 0x02A4980A, 0x02A51C0D, 0x02A57C01, 0x02A60004,
0x02A6CC1B, 0x02A77802, 0x02A8A40E, 0x02A90C01, 0x02A93002,
0x02A97004, 0x02A9DC03, 0x02A9EC01, 0x02AAC001, 0x02AAC803,
0x02AADC02, 0x02AAF802, 0x02AB0401, 0x02AB7802, 0x02ABAC07,
0x02ABD402, 0x02AF8C0B, 0x03600001, 0x036DFC02, 0x036FFC02,
0x037FFC02, 0x03E3FC01, 0x03EC7801, 0x03ECA401, 0x03EEC810,
0x03F4F802, 0x03F7F002, 0x03F8001A, 0x03F88007, 0x03F8C023,
0x03F95013, 0x03F9A004, 0x03FBFC01, 0x03FC040F, 0x03FC6807,
0x03FCEC06, 0x03FD6C0B, 0x03FF8007, 0x03FFA007, 0x03FFE405,
0x04040003, 0x0404DC09, 0x0405E411, 0x0406400C, 0x0407402E,
0x040E7C01, 0x040F4001, 0x04215C01, 0x04247C01, 0x0424FC01,
0x04280403, 0x04281402, 0x04283004, 0x0428E003, 0x0428FC01,
0x04294009, 0x0429FC01, 0x042CE407, 0x04400003, 0x0440E016,
0x04420003, 0x0442C012, 0x04440003, 0x04449C0E, 0x04450004,
0x04460003, 0x0446CC0E, 0x04471404, 0x045AAC0D, 0x0491C004,
0x05BD442E, 0x05BE3C04, 0x074000F6, 0x07440027, 0x0744A4B5,
0x07480046, 0x074C0057, 0x075B0401, 0x075B6C01, 0x075BEC01,
0x075C5401, 0x075CD401, 0x075D3C01, 0x075DBC01, 0x075E2401,
0x075EA401, 0x075F0C01, 0x07BBC002, 0x07C0002C, 0x07C0C064,
0x07C2800F, 0x07C2C40E, 0x07C3040F, 0x07C3440F, 0x07C4401F,
0x07C4C03C, 0x07C5C02B, 0x07C7981D, 0x07C8402B, 0x07C90009,
0x07C94002, 0x07CC0021, 0x07CCC006, 0x07CCDC46, 0x07CE0014,
0x07CE8025, 0x07CF1805, 0x07CF8011, 0x07D0003F, 0x07D10001,
0x07D108B6, 0x07D3E404, 0x07D4003E, 0x07D50004, 0x07D54018,
0x07D7EC46, 0x07D9140B, 0x07DA0046, 0x07DC0074, 0x38000401,
0x38008060, 0x380400F0, 0x3C000001, 0x3FFFF401, 0x40000001,
0x43FFF401,
};
static const unsigned int aAscii[4] = {
0xFFFFFFFF, 0xFC00FFFF, 0xF8000001, 0xF8000001,
};
if( c<128 ){
return ( (aAscii[c >> 5] & (1 << (c & 0x001F)))==0 );
}else if( c<(1<<22) ){
unsigned int key = (((unsigned int)c)<<10) | 0x000003FF;
int iRes;
int iHi = sizeof(aEntry)/sizeof(aEntry[0]) - 1;
int iLo = 0;
while( iHi>=iLo ){
int iTest = (iHi + iLo) / 2;
if( key >= aEntry[iTest] ){
iRes = iTest;
iLo = iTest+1;
}else{
iHi = iTest-1;
}
}
assert( aEntry[0]<key );
assert( key>=aEntry[iRes] );
return (((unsigned int)c) >= ((aEntry[iRes]>>10) + (aEntry[iRes]&0x3FF)));
}
return 1;
}
/*
** Interpret the argument as a unicode codepoint. If the codepoint
** is an upper case character that has a lower case equivalent,
** return the codepoint corresponding to the lower case version.
** Otherwise, return a copy of the argument.
**
** The results are undefined if the value passed to this function
** is less than zero.
*/
int sqlite4_tolower(int c){
/* Each entry in the following array defines a rule for folding a range
** of codepoints to lower case. The rule applies to a range of nRange
** codepoints starting at codepoint iCode.
**
** If the least significant bit in flags is clear, then the rule applies
** to all nRange codepoints (i.e. all nRange codepoints are upper case and
** need to be folded). Or, if it is set, then the rule only applies to
** every second codepoint in the range, starting with codepoint C.
**
** The 7 most significant bits in flags are an index into the aiOff[]
** array. If a specific codepoint C does require folding, then its lower
** case equivalent is ((C + aiOff[flags>>1]) & 0xFFFF).
**
** The contents of this array are generated by parsing the CaseFolding.txt
** file distributed as part of the "Unicode Character Database". See
** http://www.unicode.org for details.
*/
static const struct TableEntry {
unsigned short iCode;
unsigned char flags;
unsigned char nRange;
} aEntry[] = {
{65, 14, 26}, {181, 64, 1}, {192, 14, 23},
{216, 14, 7}, {256, 1, 48}, {306, 1, 6},
{313, 1, 16}, {330, 1, 46}, {376, 116, 1},
{377, 1, 6}, {383, 104, 1}, {385, 50, 1},
{386, 1, 4}, {390, 44, 1}, {391, 0, 1},
{393, 42, 2}, {395, 0, 1}, {398, 32, 1},
{399, 38, 1}, {400, 40, 1}, {401, 0, 1},
{403, 42, 1}, {404, 46, 1}, {406, 52, 1},
{407, 48, 1}, {408, 0, 1}, {412, 52, 1},
{413, 54, 1}, {415, 56, 1}, {416, 1, 6},
{422, 60, 1}, {423, 0, 1}, {425, 60, 1},
{428, 0, 1}, {430, 60, 1}, {431, 0, 1},
{433, 58, 2}, {435, 1, 4}, {439, 62, 1},
{440, 0, 1}, {444, 0, 1}, {452, 2, 1},
{453, 0, 1}, {455, 2, 1}, {456, 0, 1},
{458, 2, 1}, {459, 1, 18}, {478, 1, 18},
{497, 2, 1}, {498, 1, 4}, {502, 122, 1},
{503, 134, 1}, {504, 1, 40}, {544, 110, 1},
{546, 1, 18}, {570, 70, 1}, {571, 0, 1},
{573, 108, 1}, {574, 68, 1}, {577, 0, 1},
{579, 106, 1}, {580, 28, 1}, {581, 30, 1},
{582, 1, 10}, {837, 36, 1}, {880, 1, 4},
{886, 0, 1}, {902, 18, 1}, {904, 16, 3},
{908, 26, 1}, {910, 24, 2}, {913, 14, 17},
{931, 14, 9}, {962, 0, 1}, {975, 4, 1},
{976, 140, 1}, {977, 142, 1}, {981, 146, 1},
{982, 144, 1}, {984, 1, 24}, {1008, 136, 1},
{1009, 138, 1}, {1012, 130, 1}, {1013, 128, 1},
{1015, 0, 1}, {1017, 152, 1}, {1018, 0, 1},
{1021, 110, 3}, {1024, 34, 16}, {1040, 14, 32},
{1120, 1, 34}, {1162, 1, 54}, {1216, 6, 1},
{1217, 1, 14}, {1232, 1, 88}, {1329, 22, 38},
{4256, 66, 38}, {4295, 66, 1}, {4301, 66, 1},
{7680, 1, 150}, {7835, 132, 1}, {7838, 96, 1},
{7840, 1, 96}, {7944, 150, 8}, {7960, 150, 6},
{7976, 150, 8}, {7992, 150, 8}, {8008, 150, 6},
{8025, 151, 8}, {8040, 150, 8}, {8072, 150, 8},
{8088, 150, 8}, {8104, 150, 8}, {8120, 150, 2},
{8122, 126, 2}, {8124, 148, 1}, {8126, 100, 1},
{8136, 124, 4}, {8140, 148, 1}, {8152, 150, 2},
{8154, 120, 2}, {8168, 150, 2}, {8170, 118, 2},
{8172, 152, 1}, {8184, 112, 2}, {8186, 114, 2},
{8188, 148, 1}, {8486, 98, 1}, {8490, 92, 1},
{8491, 94, 1}, {8498, 12, 1}, {8544, 8, 16},
{8579, 0, 1}, {9398, 10, 26}, {11264, 22, 47},
{11360, 0, 1}, {11362, 88, 1}, {11363, 102, 1},
{11364, 90, 1}, {11367, 1, 6}, {11373, 84, 1},
{11374, 86, 1}, {11375, 80, 1}, {11376, 82, 1},
{11378, 0, 1}, {11381, 0, 1}, {11390, 78, 2},
{11392, 1, 100}, {11499, 1, 4}, {11506, 0, 1},
{42560, 1, 46}, {42624, 1, 24}, {42786, 1, 14},
{42802, 1, 62}, {42873, 1, 4}, {42877, 76, 1},
{42878, 1, 10}, {42891, 0, 1}, {42893, 74, 1},
{42896, 1, 4}, {42912, 1, 10}, {42922, 72, 1},
{65313, 14, 26},
};
static const unsigned short aiOff[] = {
1, 2, 8, 15, 16, 26, 28, 32,
37, 38, 40, 48, 63, 64, 69, 71,
79, 80, 116, 202, 203, 205, 206, 207,
209, 210, 211, 213, 214, 217, 218, 219,
775, 7264, 10792, 10795, 23228, 23256, 30204, 54721,
54753, 54754, 54756, 54787, 54793, 54809, 57153, 57274,
57921, 58019, 58363, 61722, 65268, 65341, 65373, 65406,
65408, 65410, 65415, 65424, 65436, 65439, 65450, 65462,
65472, 65476, 65478, 65480, 65482, 65488, 65506, 65511,
65514, 65521, 65527, 65528, 65529,
};
int ret = c;
assert( c>=0 );
assert( sizeof(unsigned short)==2 && sizeof(unsigned char)==1 );
if( c<128 ){
if( c>='A' && c<='Z' ) ret = c + ('a' - 'A');
}else if( c<65536 ){
int iHi = sizeof(aEntry)/sizeof(aEntry[0]) - 1;
int iLo = 0;
int iRes = -1;
while( iHi>=iLo ){
int iTest = (iHi + iLo) / 2;
int cmp = (c - aEntry[iTest].iCode);
if( cmp>=0 ){
iRes = iTest;
iLo = iTest+1;
}else{
iHi = iTest-1;
}
}
assert( iRes<0 || c>=aEntry[iRes].iCode );
if( iRes>=0 ){
const struct TableEntry *p = &aEntry[iRes];
if( c<(p->iCode + p->nRange) && 0==(0x01 & p->flags & (p->iCode ^ c)) ){
ret = (c + (aiOff[p->flags>>1])) & 0x0000FFFF;
assert( ret>0 );
}
}
}
else if( c>=66560 && c<66600 ){
ret = c + 40;
}
return ret;
}
|
Changes to src/util.c.
| ︙ | ︙ | |||
214 215 216 217 218 219 220 |
z[j++] = z[i];
}
}
z[j] = 0;
return j;
}
| < < < < < < < < < < < < < < < < < < < < < < < < < < < < | 214 215 216 217 218 219 220 221 222 223 224 225 226 227 |
z[j++] = z[i];
}
}
z[j] = 0;
return j;
}
/*
** The string z[] is an text representation of a real number.
** Convert this string to a double and write it into *pResult.
**
** The string z[] is length bytes in length (bytes, not characters) and
** uses the encoding enc. The string is not necessarily zero-terminated.
**
|
| ︙ | ︙ |