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Overview
| Comment: | Performance improvement for ascii to floating-point conversions with very large exponents. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 59bb999c8ba5e4ee7a4e388fc724b8606136d60c |
| User & Date: | drh 2011-10-17 12:14:26 |
Context
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2011-10-17
| ||
| 20:41 | Avoid 32-bit integer overflow when evaluating the exponent of a floating point value during ascii to binary conversion. check-in: 4becc47e user: drh tags: trunk | |
| 12:14 | Performance improvement for ascii to floating-point conversions with very large exponents. check-in: 59bb999c user: drh tags: trunk | |
|
2011-10-15
| ||
| 00:16 | Added the tool/warnings-clang.sh script. Changes so that there are no warnings with either gcc or clang even including FTS4 and RTREE and both with and without SQLITE_THREADSAFE=0. check-in: 39408702 user: drh tags: trunk | |
Changes
Changes to src/util.c.
378 379 380 381 382 383 384 385 386 387 388 389 390 391 |
if( esign<0 ){
result = s / scale;
result /= 1.0e+308;
}else{
result = s * scale;
result *= 1.0e+308;
}
}else{
/* 1.0e+22 is the largest power of 10 than can be
** represented exactly. */
while( e%22 ) { scale *= 1.0e+1; e -= 1; }
while( e>0 ) { scale *= 1.0e+22; e -= 22; }
if( esign<0 ){
result = s / scale;
|
> > > > > > |
378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 |
if( esign<0 ){
result = s / scale;
result /= 1.0e+308;
}else{
result = s * scale;
result *= 1.0e+308;
}
}else if( e>=342 ){
if( esign<0 ){
result = 0.0*s;
}else{
result = 1e308*1e308*s; /* Infinity */
}
}else{
/* 1.0e+22 is the largest power of 10 than can be
** represented exactly. */
while( e%22 ) { scale *= 1.0e+1; e -= 1; }
while( e>0 ) { scale *= 1.0e+22; e -= 22; }
if( esign<0 ){
result = s / scale;
|