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Rework the VDBE data structures to combine string representations into the

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same structure with integer and floating point.  This opens the door to
significant optimizations. (CVS 1202)

FossilOrigin-Name: c0faa1c67a967f028cd018e58988fb08bc814d3d
This commit is contained in:
drh
2004-01-30 14:49:16 +00:00
parent 0c37e6309b
commit 00706be366
6 changed files with 428 additions and 445 deletions
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20
src/func.c
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@@ -16,7 +16,7 @@
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: func.c,v 1.37 2004/01/19 04:53:25 jplyon Exp $
** $Id: func.c,v 1.38 2004/01/30 14:49:17 drh Exp $
*/
#include <ctype.h>
#include <math.h>
@@ -495,14 +495,16 @@ static void minStep(sqlite_func *context, int argc, const char **argv){
if( p==0 || argc<1 || argv[0]==0 ) return;
if( p->z==0 || sqliteCompare(argv[0],p->z)<0 ){
int len;
if( p->z && p->z!=p->zBuf ){
if( !p->zBuf[0] ){
sqliteFree(p->z);
}
len = strlen(argv[0]);
if( len < sizeof(p->zBuf) ){
p->z = p->zBuf;
if( len < sizeof(p->zBuf)-1 ){
p->z = &p->zBuf[1];
p->zBuf[0] = 1;
}else{
p->z = sqliteMalloc( len+1 );
p->zBuf[0] = 0;
if( p->z==0 ) return;
}
strcpy(p->z, argv[0]);
@@ -514,14 +516,16 @@ static void maxStep(sqlite_func *context, int argc, const char **argv){
if( p==0 || argc<1 || argv[0]==0 ) return;
if( p->z==0 || sqliteCompare(argv[0],p->z)>0 ){
int len;
if( p->z && p->z!=p->zBuf ){
if( !p->zBuf[0] ){
sqliteFree(p->z);
}
len = strlen(argv[0]);
if( len < sizeof(p->zBuf) ){
p->z = p->zBuf;
if( len < sizeof(p->zBuf)-1 ){
p->z = &p->zBuf[1];
p->zBuf[0] = 1;
}else{
p->z = sqliteMalloc( len+1 );
p->zBuf[0] = 0;
if( p->z==0 ) return;
}
strcpy(p->z, argv[0]);
@@ -533,7 +537,7 @@ static void minMaxFinalize(sqlite_func *context){
if( p && p->z ){
sqlite_set_result_string(context, p->z, strlen(p->z));
}
if( p && p->z && p->z!=p->zBuf ){
if( p && !p->zBuf[0] ){
sqliteFree(p->z);
}
}