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Overview
| Comment: | Simplification to the coordinate rounding logic in RTree. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | rtree-32bit-rounding |
| Files: | files | file ages | folders |
| SHA1: |
df24072de27555c6b530b02e821ea8b0 |
| User & Date: | drh 2012-05-28 20:16:42 |
Context
|
2012-05-29
| ||
| 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) | |
|
2012-05-28
| ||
| 20:16 | Simplification to the coordinate rounding logic in RTree. (check-in: df24072d user: drh tags: rtree-32bit-rounding) | |
| 19:19 | When converting 64-bit floating point coordinates to 32-bit in RTree, take care to round the values such that the size of the bounding box is enlarged. (check-in: f4e8ff03 user: drh tags: rtree-32bit-rounding) | |
Changes
Changes to ext/rtree/rtree.c.
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}else{
nodeRelease(pRtree, pRoot);
}
return rc;
}
/*
** 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){
#ifdef SQLITE_RTREE_INT_ONLY
return (RtreeValue)sqlite3_value_double(v);
#else
double d = sqlite3_value_double(v);
float f = (float)d;
if( f>d ){
if( f<0.0 ){
f += f/8388608.0;
}else{
f -= f/8388608.0;
}
}
return f;
#endif
}
static RtreeValue rtreeValueUp(sqlite3_value *v){
#ifdef SQLITE_RTREE_INT_ONLY
return (RtreeValue)sqlite3_value_double(v);
#else
double d = sqlite3_value_double(v);
float f = (float)d;
if( f<d ){
if( f<0.0 ){
f -= f/8388608.0;
}else{
f += f/8388608.0;
}
}
return f;
#endif
}
/*
** The xUpdate method for rtree module virtual tables.
*/
static int rtreeUpdate(
sqlite3_vtab *pVtab,
int nData,
|
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}else{
nodeRelease(pRtree, pRoot);
}
return rc;
}
#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 ){
if( f<0.0 ){
f += f/8388608.0;
}else{
f -= f/8388608.0;
}
}
return f;
}
static RtreeValue rtreeValueUp(sqlite3_value *v){
double d = sqlite3_value_double(v);
float f = (float)d;
if( f<d ){
if( f<0.0 ){
f -= f/8388608.0;
}else{
f += f/8388608.0;
}
}
return f;
}
#endif /* !defined(SQLITE_RTREE_INT_ONLY) */
/*
** The xUpdate method for rtree module virtual tables.
*/
static int rtreeUpdate(
sqlite3_vtab *pVtab,
int nData,
|