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Overview
| Comment: | In the RTree module, make sure all double-to-float conversions round in a direction to increase the size of element bounding boxes. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 0abdc2903d8b3f86cad426e1bac2a959 |
| User & Date: | drh 2012-05-29 00:39:50 |
Context
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2012-05-29
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| 17:02 | Changes some NDEBUG macros to SQLITE_DEBUG in os_unix.c. The is a notational change only and really should not effect the code. check-in: 8e302570 user: drh tags: trunk | |
| 00:48 | Merge the 64-to-32-bit RTree rounding fixes from trunk into the sessions branch. check-in: 7eff45c2 user: drh tags: sessions | |
| 00:39 | In the RTree module, make sure all double-to-float conversions round in a direction to increase the size of element bounding boxes. check-in: 0abdc290 user: drh tags: trunk | |
| 00:30 | Refactor the float-to-double rounding routines so that they compile without warnings. Closed-Leaf check-in: f607ad27 user: drh tags: rtree-32bit-rounding | |
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2012-05-28
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| 20:22 | Fix the MSVC makefile so that it works with the unicode61 tokenizer. check-in: 48015814 user: drh tags: trunk | |
Changes
Changes to ext/rtree/rtree.c.
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rc = nodeRelease(pRtree, pRoot);
}else{
nodeRelease(pRtree, pRoot);
}
return rc;
}
/*
** The xUpdate method for rtree module virtual tables.
*/
static int rtreeUpdate(
sqlite3_vtab *pVtab,
int nData,
................................................................................
int ii;
/* Populate the cell.aCoord[] array. The first coordinate is azData[3]. */
assert( nData==(pRtree->nDim*2 + 3) );
#ifndef SQLITE_RTREE_INT_ONLY
if( pRtree->eCoordType==RTREE_COORD_REAL32 ){
for(ii=0; ii<(pRtree->nDim*2); ii+=2){
cell.aCoord[ii].f = (RtreeValue)sqlite3_value_double(azData[ii+3]);
cell.aCoord[ii+1].f = (RtreeValue)sqlite3_value_double(azData[ii+4]);
if( cell.aCoord[ii].f>cell.aCoord[ii+1].f ){
rc = SQLITE_CONSTRAINT;
goto constraint;
}
}
}else
#endif
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rc = nodeRelease(pRtree, pRoot);
}else{
nodeRelease(pRtree, pRoot);
}
return rc;
}
/*
** Rounding constants for float->double conversion.
*/
#define RNDTOWARDS (1.0 - 1.0/8388608.0) /* Round towards zero */
#define RNDAWAY (1.0 + 1.0/8388608.0) /* Round away from zero */
#if !defined(SQLITE_RTREE_INT_ONLY)
/*
** Convert an sqlite3_value into an RtreeValue (presumably a float)
** while taking care to round toward negative or positive, respectively.
*/
static RtreeValue rtreeValueDown(sqlite3_value *v){
double d = sqlite3_value_double(v);
float f = (float)d;
if( f>d ){
f = (float)(d*(d<0 ? RNDAWAY : RNDTOWARDS));
}
return f;
}
static RtreeValue rtreeValueUp(sqlite3_value *v){
double d = sqlite3_value_double(v);
float f = (float)d;
if( f<d ){
f = (float)(d*(d<0 ? RNDTOWARDS : RNDAWAY));
}
return f;
}
#endif /* !defined(SQLITE_RTREE_INT_ONLY) */
/*
** The xUpdate method for rtree module virtual tables.
*/
static int rtreeUpdate(
sqlite3_vtab *pVtab,
int nData,
................................................................................
int ii;
/* Populate the cell.aCoord[] array. The first coordinate is azData[3]. */
assert( nData==(pRtree->nDim*2 + 3) );
#ifndef SQLITE_RTREE_INT_ONLY
if( pRtree->eCoordType==RTREE_COORD_REAL32 ){
for(ii=0; ii<(pRtree->nDim*2); ii+=2){
cell.aCoord[ii].f = rtreeValueDown(azData[ii+3]);
cell.aCoord[ii+1].f = rtreeValueUp(azData[ii+4]);
if( cell.aCoord[ii].f>cell.aCoord[ii+1].f ){
rc = SQLITE_CONSTRAINT;
goto constraint;
}
}
}else
#endif
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