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Add the sqlite3_set_auxdata() and sqlite3_get_auxdata() APIs. (CVS 1532)

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FossilOrigin-Name: c2899b437366d879258ab4f6ae47868441010eca
This commit is contained in:
danielk1977
2004-06-05 10:22:17 +00:00
parent 2a02e33950
commit 682f68b020
9 changed files with 150 additions and 22 deletions
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41
src/vdbeapi.c
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@@ -217,6 +217,47 @@ void *sqlite3_aggregate_context(sqlite3_context *p, int nByte){
return p->pAgg;
}
/*
** Return the auxilary data pointer, if any, for the iArg'th argument to
** the user-function defined by pCtx.
*/
void *sqlite3_get_auxdata(sqlite3_context *pCtx, int iArg){
VdbeFunc *pVdbeFunc = pCtx->pVdbeFunc;
if( !pVdbeFunc || iArg>=pVdbeFunc->nAux || iArg<0 ){
return 0;
}
return pCtx->pVdbeFunc->apAux[iArg].pAux;
}
/*
** Set the auxilary data pointer and delete function, for the iArg'th
** argument to the user-function defined by pCtx. Any previous value is
** deleted by calling the delete function specified when it was set.
*/
void sqlite3_set_auxdata(
sqlite3_context *pCtx,
int iArg,
void *pAux,
void (*xDelete)(void*)
){
struct AuxData *pAuxData;
if( iArg<0 ) return;
if( !pCtx->pVdbeFunc || pCtx->pVdbeFunc->nAux<=iArg ){
int nMalloc = sizeof(VdbeFunc)+sizeof(struct AuxData)*(iArg+1);
pCtx->pVdbeFunc = sqliteRealloc(pCtx->pVdbeFunc, nMalloc);
if( !pCtx->pVdbeFunc ) return;
pCtx->pVdbeFunc->nAux = iArg+1;
}
pAuxData = &pCtx->pVdbeFunc->apAux[iArg];
if( pAuxData->pAux && pAuxData->xDelete ){
pAuxData->xDelete(pAuxData->pAux);
}
pAuxData->pAux = pAux;
pAuxData->xDelete = xDelete;
}
/*
** Return the number of times the Step function of a aggregate has been
** called.