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Overview
| Comment: | Rename fields of the internal AuxData object to make them unique and easier to search for. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: | 2be9850cef6492e168243807c34af721 |
| User & Date: | drh 2017-05-10 19:42:52 |
Context
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2017-05-11
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| 12:05 | Change the SQLITE_READ authorization call for unreferenced tables to use an empty string for the column name, as this is less likely to impact legacy authorization callbacks that assume column names are always non-NULL. check-in: 4139953a user: drh tags: trunk | |
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2017-05-10
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| 19:42 | Rename fields of the internal AuxData object to make them unique and easier to search for. check-in: 2be9850c user: drh tags: trunk | |
| 16:33 | Improved documentation for the SQLITE_READ authorizer callback. No code changes. check-in: 92c5ea70 user: drh tags: trunk | |
Changes
Changes to src/vdbeInt.h.
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** Each auxiliary data pointer stored by a user defined function
** implementation calling sqlite3_set_auxdata() is stored in an instance
** of this structure. All such structures associated with a single VM
** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed
** when the VM is halted (if not before).
*/
struct AuxData {
int iOp; /* Instruction number of OP_Function opcode */
int iArg; /* Index of function argument. */
void *pAux; /* Aux data pointer */
void (*xDelete)(void *); /* Destructor for the aux data */
AuxData *pNext; /* Next element in list */
};
/*
** The "context" argument for an installable function. A pointer to an
** instance of this structure is the first argument to the routines used
** implement the SQL functions.
**
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** Each auxiliary data pointer stored by a user defined function
** implementation calling sqlite3_set_auxdata() is stored in an instance
** of this structure. All such structures associated with a single VM
** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed
** when the VM is halted (if not before).
*/
struct AuxData {
int iAuxOp; /* Instruction number of OP_Function opcode */
int iAuxArg; /* Index of function argument. */
void *pAux; /* Aux data pointer */
void (*xDeleteAux)(void*); /* Destructor for the aux data */
AuxData *pNextAux; /* Next element in list */
};
/*
** The "context" argument for an installable function. A pointer to an
** instance of this structure is the first argument to the routines used
** implement the SQL functions.
**
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Changes to src/vdbeapi.c.
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assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
#if SQLITE_ENABLE_STAT3_OR_STAT4
if( pCtx->pVdbe==0 ) return 0;
#else
assert( pCtx->pVdbe!=0 );
#endif
for(pAuxData=pCtx->pVdbe->pAuxData; pAuxData; pAuxData=pAuxData->pNext){
if( pAuxData->iOp==pCtx->iOp && pAuxData->iArg==iArg ) break;
}
return (pAuxData ? pAuxData->pAux : 0);
}
/*
** Set the auxiliary 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.
*/
................................................................................
if( iArg<0 ) goto failed;
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
if( pVdbe==0 ) goto failed;
#else
assert( pVdbe!=0 );
#endif
for(pAuxData=pVdbe->pAuxData; pAuxData; pAuxData=pAuxData->pNext){
if( pAuxData->iOp==pCtx->iOp && pAuxData->iArg==iArg ) break;
}
if( pAuxData==0 ){
pAuxData = sqlite3DbMallocZero(pVdbe->db, sizeof(AuxData));
if( !pAuxData ) goto failed;
pAuxData->iOp = pCtx->iOp;
pAuxData->iArg = iArg;
pAuxData->pNext = pVdbe->pAuxData;
pVdbe->pAuxData = pAuxData;
if( pCtx->fErrorOrAux==0 ){
pCtx->isError = 0;
pCtx->fErrorOrAux = 1;
}
}else if( pAuxData->xDelete ){
pAuxData->xDelete(pAuxData->pAux);
}
pAuxData->pAux = pAux;
pAuxData->xDelete = xDelete;
return;
failed:
if( xDelete ){
xDelete(pAux);
}
}
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assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) ); #if SQLITE_ENABLE_STAT3_OR_STAT4 if( pCtx->pVdbe==0 ) return 0; #else assert( pCtx->pVdbe!=0 ); #endif for(pAuxData=pCtx->pVdbe->pAuxData; pAuxData; pAuxData=pAuxData->pNextAux){ if( pAuxData->iAuxOp==pCtx->iOp && pAuxData->iAuxArg==iArg ){ return pAuxData->pAux; } } return 0; } /* ** Set the auxiliary 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. */ ................................................................................ if( iArg<0 ) goto failed; #ifdef SQLITE_ENABLE_STAT3_OR_STAT4 if( pVdbe==0 ) goto failed; #else assert( pVdbe!=0 ); #endif for(pAuxData=pVdbe->pAuxData; pAuxData; pAuxData=pAuxData->pNextAux){ if( pAuxData->iAuxOp==pCtx->iOp && pAuxData->iAuxArg==iArg ) break; } if( pAuxData==0 ){ pAuxData = sqlite3DbMallocZero(pVdbe->db, sizeof(AuxData)); if( !pAuxData ) goto failed; pAuxData->iAuxOp = pCtx->iOp; pAuxData->iAuxArg = iArg; pAuxData->pNextAux = pVdbe->pAuxData; pVdbe->pAuxData = pAuxData; if( pCtx->fErrorOrAux==0 ){ pCtx->isError = 0; pCtx->fErrorOrAux = 1; } }else if( pAuxData->xDeleteAux ){ pAuxData->xDeleteAux(pAuxData->pAux); } pAuxData->pAux = pAux; pAuxData->xDeleteAux = xDelete; return; failed: if( xDelete ){ xDelete(pAux); } } |
Changes to src/vdbeaux.c.
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** * the corresponding bit in argument mask is clear (where the first
** function parameter corresponds to bit 0 etc.).
*/
void sqlite3VdbeDeleteAuxData(sqlite3 *db, AuxData **pp, int iOp, int mask){
while( *pp ){
AuxData *pAux = *pp;
if( (iOp<0)
|| (pAux->iOp==iOp && (pAux->iArg>31 || !(mask & MASKBIT32(pAux->iArg))))
){
testcase( pAux->iArg==31 );
if( pAux->xDelete ){
pAux->xDelete(pAux->pAux);
}
*pp = pAux->pNext;
sqlite3DbFree(db, pAux);
}else{
pp= &pAux->pNext;
}
}
}
/*
** Free all memory associated with the Vdbe passed as the second argument,
** except for object itself, which is preserved.
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** * the corresponding bit in argument mask is clear (where the first
** function parameter corresponds to bit 0 etc.).
*/
void sqlite3VdbeDeleteAuxData(sqlite3 *db, AuxData **pp, int iOp, int mask){
while( *pp ){
AuxData *pAux = *pp;
if( (iOp<0)
|| (pAux->iAuxOp==iOp
&& (pAux->iAuxArg>31 || !(mask & MASKBIT32(pAux->iAuxArg))))
){
testcase( pAux->iAuxArg==31 );
if( pAux->xDeleteAux ){
pAux->xDeleteAux(pAux->pAux);
}
*pp = pAux->pNextAux;
sqlite3DbFree(db, pAux);
}else{
pp= &pAux->pNextAux;
}
}
}
/*
** Free all memory associated with the Vdbe passed as the second argument,
** except for object itself, which is preserved.
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