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Overview
Comment: | Faster implementation for sqlite3VdbeIntValue() and sqlite3VdbeRealValue(). |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA3-256: |
8698df60c23d4dcc80b58352c14ae80e |
User & Date: | drh 2017-04-01 11:59:36.584 |
Context
2017-04-01
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19:45 | Remove an unnecessary clearing of the Vdbe.iCurrentTime value. (check-in: fcd2acdd60 user: drh tags: trunk) | |
11:59 | Faster implementation for sqlite3VdbeIntValue() and sqlite3VdbeRealValue(). (check-in: 8698df60c2 user: drh tags: trunk) | |
11:40 | Remove unused fields from the BtCursor object. (check-in: 1c0d82e078 user: drh tags: trunk) | |
Changes
Changes to src/vdbemem.c.
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416 417 418 419 420 421 422 | } /* ** Convert a 64-bit IEEE double into a 64-bit signed integer. ** If the double is out of range of a 64-bit signed integer then ** return the closest available 64-bit signed integer. */ | | | 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 | } /* ** Convert a 64-bit IEEE double into a 64-bit signed integer. ** If the double is out of range of a 64-bit signed integer then ** return the closest available 64-bit signed integer. */ static SQLITE_NOINLINE i64 doubleToInt64(double r){ #ifdef SQLITE_OMIT_FLOATING_POINT /* When floating-point is omitted, double and int64 are the same thing */ return r; #else /* ** Many compilers we encounter do not define constants for the ** minimum and maximum 64-bit integers, or they define them |
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452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 | ** a floating-point then the value returned is the integer part. ** If pMem is a string or blob, then we make an attempt to convert ** it into an integer and return that. If pMem represents an ** an SQL-NULL value, return 0. ** ** If pMem represents a string value, its encoding might be changed. */ 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->u.r); }else if( flags & (MEM_Str|MEM_Blob) ){ | > > > > > < < | > > > > > > < < < | | 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 | ** a floating-point then the value returned is the integer part. ** If pMem is a string or blob, then we make an attempt to convert ** it into an integer and return that. If pMem represents an ** an SQL-NULL value, return 0. ** ** If pMem represents a string value, its encoding might be changed. */ static SQLITE_NOINLINE i64 memIntValue(Mem *pMem){ i64 value = 0; sqlite3Atoi64(pMem->z, &value, pMem->n, pMem->enc); return value; } 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->u.r); }else if( flags & (MEM_Str|MEM_Blob) ){ assert( pMem->z || pMem->n==0 ); return memIntValue(pMem); }else{ return 0; } } /* ** 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. */ static SQLITE_NOINLINE double memRealValue(Mem *pMem){ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */ double val = (double)0; sqlite3AtoF(pMem->z, &val, pMem->n, pMem->enc); return val; } 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->u.r; }else if( pMem->flags & MEM_Int ){ return (double)pMem->u.i; }else if( pMem->flags & (MEM_Str|MEM_Blob) ){ return memRealValue(pMem); }else{ /* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */ return (double)0; } } /* |
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