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Overview
| Comment: | Attempt to work around a bug in the Borland BCC 5.5.1 compiler. Ticket #2880. (CVS 4705) |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
6de0ee49073c7a47d5e10495b569b33d |
| User & Date: | drh 2008-01-11 00:06:11.000 |
Context
|
2008-01-11
| ||
| 15:27 | Do explicit range tests before attempting to convert a 64-bit float into a 64-bit integer. Some systems (windows) seem to throw exceptions if the conversion is out of range. Ticket #2880. (CVS 4706) (check-in: 4744257d3c user: drh tags: trunk) | |
| 00:06 | Attempt to work around a bug in the Borland BCC 5.5.1 compiler. Ticket #2880. (CVS 4705) (check-in: 6de0ee4907 user: drh tags: trunk) | |
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2008-01-10
| ||
| 23:50 | More work toward converting the VM into a register-based machine. (CVS 4704) (check-in: 8cbd46517f user: drh tags: trunk) | |
Changes
Changes to src/vdbemem.c.
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351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 |
/*
** The MEM structure is already a MEM_Real. Try to also make it a
** MEM_Int if we can.
*/
void sqlite3VdbeIntegerAffinity(Mem *pMem){
assert( pMem->flags & MEM_Real );
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
pMem->u.i = pMem->r;
if( ((double)pMem->u.i)==pMem->r ){
pMem->flags |= MEM_Int;
}
}
/*
** Convert pMem to type integer. Invalidate any prior representations.
| > > > > > > > > > > > > > > > > > > > | 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 |
/*
** The MEM structure is already a MEM_Real. Try to also make it a
** MEM_Int if we can.
*/
void sqlite3VdbeIntegerAffinity(Mem *pMem){
assert( pMem->flags & MEM_Real );
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
/* It is reported (in ticket #2880) that the BCC 5.5.1 compiler
** will corrupt a floating point number on the right-hand side
** of an assignment if the lvalue for the assignment is an integer.
**
** We will attempt to work around this bug in the Borland compiler
** by moving the value into a temporary variable first so that if
** the assignment into the integer really does corrupt the right-hand
** side value, it will corrupt a temporary variable that we do not
** care about.
*/
#ifdef __BORLANDC__
{
double r = pMem->r;
pMem->u.i = r;
}
#else
pMem->u.i = pMem->r;
#endif
if( ((double)pMem->u.i)==pMem->r ){
pMem->flags |= MEM_Int;
}
}
/*
** Convert pMem to type integer. Invalidate any prior representations.
|
| ︙ | ︙ |