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Overview
| Comment: | Redesign the string to numeric value caster so that it is more likely to work on unusual floating point hardware. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
8bb1104c6f02c88eb09ed345890be71d |
| User & Date: | drh 2010-01-21 01:53:08 |
Context
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2010-01-21
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| 23:11 | Fix a segfault that can occur when the LHS of a LIKE operator has an undefined collating sequence. Ticket [1258875e07553]. (check-in: a82e6b45 user: drh tags: trunk) | |
| 01:53 | Redesign the string to numeric value caster so that it is more likely to work on unusual floating point hardware. (check-in: 8bb1104c user: drh tags: trunk) | |
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2010-01-20
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| 14:25 | Fix a problem with handling OOM errors in fts3. (check-in: f9c54e95 user: dan tags: trunk) | |
Changes
Changes to src/vdbemem.c.
464 464 MemSetTypeFlag(pMem, MEM_Real); 465 465 return SQLITE_OK; 466 466 } 467 467 468 468 /* 469 469 ** Convert pMem so that it has types MEM_Real or MEM_Int or both. 470 470 ** Invalidate any prior representations. 471 +** 472 +** Every effort is made to force the conversion, even if the input 473 +** is a string that does not look completely like a number. Convert 474 +** as much of the string as we can and ignore the rest. 471 475 */ 472 476 int sqlite3VdbeMemNumerify(Mem *pMem){ 473 - double r1, r2; 474 - i64 i; 477 + int rc; 475 478 assert( (pMem->flags & (MEM_Int|MEM_Real|MEM_Null))==0 ); 476 479 assert( (pMem->flags & (MEM_Blob|MEM_Str))!=0 ); 477 480 assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) ); 478 - r1 = sqlite3VdbeRealValue(pMem); 479 - i = doubleToInt64(r1); 480 - r2 = (double)i; 481 - if( r1==r2 ){ 482 - sqlite3VdbeMemIntegerify(pMem); 481 + rc = sqlite3VdbeChangeEncoding(pMem, SQLITE_UTF8); 482 + if( rc ) return rc; 483 + rc = sqlite3VdbeMemNulTerminate(pMem); 484 + if( rc ) return rc; 485 + if( sqlite3Atoi64(pMem->z, &pMem->u.i) ){ 486 + MemSetTypeFlag(pMem, MEM_Int); 483 487 }else{ 484 - pMem->r = r1; 488 + pMem->r = sqlite3VdbeRealValue(pMem); 485 489 MemSetTypeFlag(pMem, MEM_Real); 490 + sqlite3VdbeIntegerAffinity(pMem); 486 491 } 487 492 return SQLITE_OK; 488 493 } 489 494 490 495 /* 491 496 ** Delete any previous value and set the value stored in *pMem to NULL. 492 497 */