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make it a little faster (CVS 160)

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FossilOrigin-Name: 757668bd641134a6f7479c8df1c8b06a24d51ee4
This commit is contained in:
drh
2000-10-19 14:42:04 +00:00
parent 01d01eeee0
commit efa4e17240
3 changed files with 36 additions and 18 deletions
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40
src/vdbe.c
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@@ -41,7 +41,7 @@
** But other routines are also provided to help in building up
** a program instruction by instruction.
**
** $Id: vdbe.c,v 1.44 2000/10/19 01:49:03 drh Exp $
** $Id: vdbe.c,v 1.45 2000/10/19 14:42:05 drh Exp $
*/
#include "sqliteInt.h"
#include <unistd.h>
@@ -547,22 +547,24 @@ static int SetTest(Set *p, char *zKey){
#define Stringify(P,I) \
((P->aStack[I].flags & STK_Str)==0 ? hardStringify(P,I) : 0)
static int hardStringify(Vdbe *p, int i){
Stack *pStack = &p->aStack[i];
char **pzStack = &p->zStack[i];
char zBuf[30];
int fg = p->aStack[i].flags;
int fg = pStack->flags;
if( fg & STK_Real ){
sprintf(zBuf,"%.15g",p->aStack[i].r);
sprintf(zBuf,"%.15g",pStack->r);
}else if( fg & STK_Int ){
sprintf(zBuf,"%d",p->aStack[i].i);
sprintf(zBuf,"%d",pStack->i);
}else{
p->zStack[i] = "";
p->aStack[i].n = 1;
p->aStack[i].flags |= STK_Str;
pStack->n = 1;
pStack->flags |= STK_Str;
return 0;
}
p->zStack[i] = sqliteStrDup(zBuf);
if( p->zStack[i]==0 ) return 1;
p->aStack[i].n = strlen(p->zStack[i])+1;
p->aStack[i].flags |= STK_Str|STK_Dyn;
*pzStack = sqliteStrDup(zBuf);
if( *pzStack==0 ) return 1;
pStack->n = strlen(*pzStack)+1;
pStack->flags |= STK_Str|STK_Dyn;
return 0;
}
@@ -622,7 +624,22 @@ static void hardRealify(Vdbe *p, int i){
** popped stack elements.
*/
static void PopStack(Vdbe *p, int N){
char **pzStack;
Stack *pStack;
if( p->zStack==0 ) return;
pStack = &p->aStack[p->tos];
pzStack = &p->zStack[p->tos];
p->tos -= N;
while( N-- > 0 ){
if( pStack->flags & STK_Dyn ){
sqliteFree(*pzStack);
}
pStack->flags = 0;
*pzStack = 0;
pStack--;
pzStack--;
}
#if 0 /* Older code was a little slower */
while( p->tos>=0 && N-->0 ){
int i = p->tos--;
if( p->aStack[i].flags & STK_Dyn ){
@@ -630,7 +647,8 @@ static void PopStack(Vdbe *p, int N){
}
p->aStack[i].flags = 0;
p->zStack[i] = 0;
}
}
#endif
}
/*