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Overview
| Comment: | Enhance error message handling for the vtshim module. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | disposable-vtable |
| Files: | files | file ages | folders |
| SHA1: |
b4a0d5327addd90bef758e6a1403ac69 |
| User & Date: | mistachkin 2013-06-21 19:39:51 |
Context
|
2013-06-26
| ||
| 18:04 | Add the "vtshim" extension, implementing a wrapper around the virtual table interface to make it Disposable for the CLR. No changes to the core. (check-in: 6c3839ef user: drh tags: trunk) | |
|
2013-06-21
| ||
| 19:39 | Enhance error message handling for the vtshim module. (Closed-Leaf check-in: b4a0d532 user: mistachkin tags: disposable-vtable) | |
|
2013-06-20
| ||
| 01:27 | The vtshim xCreate and xConnect functions need to store the pAux pointer into the newly created vtable object. Style fixes. (check-in: 43913c7b user: mistachkin tags: disposable-vtable) | |
Changes
Changes to ext/misc/vtshim.c.
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/* A vtshim cursor object */
struct vtshim_cursor {
sqlite3_vtab_cursor base; /* Base class - must be first */
sqlite3_vtab_cursor *pChild; /* Cursor generated by the managed subclass */
vtshim_cursor **ppPrev; /* Previous on list of all cursors */
vtshim_cursor *pNext; /* Next on list of all cursors */
};
/* Methods for the vtshim module */
static int vtshimCreate(
sqlite3 *db,
void *ppAux,
int argc,
const char *const*argv,
................................................................................
char **pzErr
){
vtshim_aux *pAux = (vtshim_aux*)ppAux;
vtshim_vtab *pNew;
int rc;
assert( db==pAux->db );
pNew = sqlite3_malloc( sizeof(*pNew) );
*ppVtab = (sqlite3_vtab*)pNew;
if( pNew==0 ) return SQLITE_NOMEM;
memset(pNew, 0, sizeof(*pNew));
rc = pAux->pMod->xCreate(db, pAux->pChildAux, argc, argv,
&pNew->pChild, pzErr);
if( rc ){
................................................................................
char **pzErr
){
vtshim_aux *pAux = (vtshim_aux*)ppAux;
vtshim_vtab *pNew;
int rc;
assert( db==pAux->db );
pNew = sqlite3_malloc( sizeof(*pNew) );
*ppVtab = (sqlite3_vtab*)pNew;
if( pNew==0 ) return SQLITE_NOMEM;
memset(pNew, 0, sizeof(*pNew));
rc = pAux->pMod->xConnect(db, pAux->pChildAux, argc, argv,
&pNew->pChild, pzErr);
if( rc ){
................................................................................
static int vtshimBestIndex(
sqlite3_vtab *pBase,
sqlite3_index_info *pIdxInfo
){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xBestIndex(pVtab->pChild, pIdxInfo);
}
static int vtshimDisconnect(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc = SQLITE_OK;
if( !pAux->bDisposed ){
rc = pAux->pMod->xDisconnect(pVtab->pChild);
................................................................................
static int vtshimOpen(sqlite3_vtab *pBase, sqlite3_vtab_cursor **ppCursor){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
vtshim_cursor *pCur;
int rc;
*ppCursor = 0;
if( pAux->bDisposed ) return SQLITE_ERROR;
pCur = sqlite3_malloc( sizeof(*pCur) );
if( pCur==0 ) return SQLITE_NOMEM;
memset(pCur, 0, sizeof(*pCur));
rc = pAux->pMod->xOpen(pVtab->pChild, &pCur->pChild);
if( rc ){
sqlite3_free(pCur);
return rc;
}
pCur->pChild->pVtab = pVtab->pChild;
*ppCursor = &pCur->base;
pCur->ppPrev = &pVtab->pAllCur;
if( pVtab->pAllCur ) pVtab->pAllCur->ppPrev = &pCur->pNext;
pCur->pNext = pVtab->pAllCur;
................................................................................
static int vtshimClose(sqlite3_vtab_cursor *pX){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
int rc = SQLITE_OK;
if( !pAux->bDisposed ){
rc = pAux->pMod->xClose(pCur->pChild);
}
if( pCur->pNext ) pCur->pNext->ppPrev = pCur->ppPrev;
*pCur->ppPrev = pCur->pNext;
sqlite3_free(pCur);
return rc;
}
................................................................................
const char *idxStr,
int argc,
sqlite3_value **argv
){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xFilter(pCur->pChild, idxNum, idxStr, argc, argv);
}
static int vtshimNext(sqlite3_vtab_cursor *pX){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xNext(pCur->pChild);
}
static int vtshimEof(sqlite3_vtab_cursor *pX){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xEof(pCur->pChild);
}
static int vtshimColumn(sqlite3_vtab_cursor *pX, sqlite3_context *ctx, int i){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xColumn(pCur->pChild, ctx, i);
}
static int vtshimRowid(sqlite3_vtab_cursor *pX, sqlite3_int64 *pRowid){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xRowid(pCur->pChild, pRowid);
}
static int vtshimUpdate(
sqlite3_vtab *pBase,
int argc,
sqlite3_value **argv,
sqlite3_int64 *pRowid
){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xUpdate(pVtab->pChild, argc, argv, pRowid);
}
static int vtshimBegin(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xBegin(pVtab->pChild);
}
static int vtshimSync(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xSync(pVtab->pChild);
}
static int vtshimCommit(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xCommit(pVtab->pChild);
}
static int vtshimRollback(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xRollback(pVtab->pChild);
}
static int vtshimFindFunction(
sqlite3_vtab *pBase,
int nArg,
const char *zName,
void (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
void **ppArg
){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xFindFunction(pVtab->pChild, nArg, zName, pxFunc, ppArg);
}
static int vtshimRename(sqlite3_vtab *pBase, const char *zNewName){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xRename(pVtab->pChild, zNewName);
}
static int vtshimSavepoint(sqlite3_vtab *pBase, int n){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xSavepoint(pVtab->pChild, n);
}
static int vtshimRelease(sqlite3_vtab *pBase, int n){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xRelease(pVtab->pChild, n);
}
static int vtshimRollbackTo(sqlite3_vtab *pBase, int n){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
if( pAux->bDisposed ) return SQLITE_ERROR;
return pAux->pMod->xRollbackTo(pVtab->pChild, n);
}
/* The destructor function for a disposible module */
static void vtshimAuxDestructor(void *pXAux){
vtshim_aux *pAux = (vtshim_aux*)pXAux;
assert( pAux->pAllVtab==0 );
if( !pAux->bDisposed && pAux->xChildDestroy ){
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/* A vtshim cursor object */
struct vtshim_cursor {
sqlite3_vtab_cursor base; /* Base class - must be first */
sqlite3_vtab_cursor *pChild; /* Cursor generated by the managed subclass */
vtshim_cursor **ppPrev; /* Previous on list of all cursors */
vtshim_cursor *pNext; /* Next on list of all cursors */
};
/* Macro used to copy the child vtable error message to outer vtable */
#define VTSHIM_COPY_ERRMSG() \
do { \
sqlite3_free(pVtab->base.zErrMsg); \
pVtab->base.zErrMsg = sqlite3_mprintf("%s", pVtab->pChild->zErrMsg); \
} while (0)
/* Methods for the vtshim module */
static int vtshimCreate(
sqlite3 *db,
void *ppAux,
int argc,
const char *const*argv,
................................................................................
char **pzErr
){
vtshim_aux *pAux = (vtshim_aux*)ppAux;
vtshim_vtab *pNew;
int rc;
assert( db==pAux->db );
if( pAux->bDisposed ){
if( pzErr ){
*pzErr = sqlite3_mprintf("virtual table was disposed: \"%s\"",
pAux->zName);
}
return SQLITE_ERROR;
}
pNew = sqlite3_malloc( sizeof(*pNew) );
*ppVtab = (sqlite3_vtab*)pNew;
if( pNew==0 ) return SQLITE_NOMEM;
memset(pNew, 0, sizeof(*pNew));
rc = pAux->pMod->xCreate(db, pAux->pChildAux, argc, argv,
&pNew->pChild, pzErr);
if( rc ){
................................................................................
char **pzErr
){
vtshim_aux *pAux = (vtshim_aux*)ppAux;
vtshim_vtab *pNew;
int rc;
assert( db==pAux->db );
if( pAux->bDisposed ){
if( pzErr ){
*pzErr = sqlite3_mprintf("virtual table was disposed: \"%s\"",
pAux->zName);
}
return SQLITE_ERROR;
}
pNew = sqlite3_malloc( sizeof(*pNew) );
*ppVtab = (sqlite3_vtab*)pNew;
if( pNew==0 ) return SQLITE_NOMEM;
memset(pNew, 0, sizeof(*pNew));
rc = pAux->pMod->xConnect(db, pAux->pChildAux, argc, argv,
&pNew->pChild, pzErr);
if( rc ){
................................................................................
static int vtshimBestIndex(
sqlite3_vtab *pBase,
sqlite3_index_info *pIdxInfo
){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xBestIndex(pVtab->pChild, pIdxInfo);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimDisconnect(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc = SQLITE_OK;
if( !pAux->bDisposed ){
rc = pAux->pMod->xDisconnect(pVtab->pChild);
................................................................................
static int vtshimOpen(sqlite3_vtab *pBase, sqlite3_vtab_cursor **ppCursor){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
vtshim_cursor *pCur;
int rc;
*ppCursor = 0;
if( pAux->bDisposed ) return SQLITE_ERROR;
pCur = sqlite3_malloc( sizeof(*pCur) );
if( pCur==0 ) return SQLITE_NOMEM;
memset(pCur, 0, sizeof(*pCur));
rc = pAux->pMod->xOpen(pVtab->pChild, &pCur->pChild);
if( rc ){
sqlite3_free(pCur);
VTSHIM_COPY_ERRMSG();
return rc;
}
pCur->pChild->pVtab = pVtab->pChild;
*ppCursor = &pCur->base;
pCur->ppPrev = &pVtab->pAllCur;
if( pVtab->pAllCur ) pVtab->pAllCur->ppPrev = &pCur->pNext;
pCur->pNext = pVtab->pAllCur;
................................................................................
static int vtshimClose(sqlite3_vtab_cursor *pX){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
int rc = SQLITE_OK;
if( !pAux->bDisposed ){
rc = pAux->pMod->xClose(pCur->pChild);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
}
if( pCur->pNext ) pCur->pNext->ppPrev = pCur->ppPrev;
*pCur->ppPrev = pCur->pNext;
sqlite3_free(pCur);
return rc;
}
................................................................................
const char *idxStr,
int argc,
sqlite3_value **argv
){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xFilter(pCur->pChild, idxNum, idxStr, argc, argv);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimNext(sqlite3_vtab_cursor *pX){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xNext(pCur->pChild);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimEof(sqlite3_vtab_cursor *pX){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return 1;
rc = pAux->pMod->xEof(pCur->pChild);
VTSHIM_COPY_ERRMSG();
return rc;
}
static int vtshimColumn(sqlite3_vtab_cursor *pX, sqlite3_context *ctx, int i){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xColumn(pCur->pChild, ctx, i);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimRowid(sqlite3_vtab_cursor *pX, sqlite3_int64 *pRowid){
vtshim_cursor *pCur = (vtshim_cursor*)pX;
vtshim_vtab *pVtab = (vtshim_vtab*)pCur->base.pVtab;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xRowid(pCur->pChild, pRowid);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimUpdate(
sqlite3_vtab *pBase,
int argc,
sqlite3_value **argv,
sqlite3_int64 *pRowid
){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xUpdate(pVtab->pChild, argc, argv, pRowid);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimBegin(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xBegin(pVtab->pChild);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimSync(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xSync(pVtab->pChild);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimCommit(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xCommit(pVtab->pChild);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimRollback(sqlite3_vtab *pBase){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xRollback(pVtab->pChild);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimFindFunction(
sqlite3_vtab *pBase,
int nArg,
const char *zName,
void (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
void **ppArg
){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return 0;
rc = pAux->pMod->xFindFunction(pVtab->pChild, nArg, zName, pxFunc, ppArg);
VTSHIM_COPY_ERRMSG();
return rc;
}
static int vtshimRename(sqlite3_vtab *pBase, const char *zNewName){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xRename(pVtab->pChild, zNewName);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimSavepoint(sqlite3_vtab *pBase, int n){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xSavepoint(pVtab->pChild, n);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimRelease(sqlite3_vtab *pBase, int n){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xRelease(pVtab->pChild, n);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
static int vtshimRollbackTo(sqlite3_vtab *pBase, int n){
vtshim_vtab *pVtab = (vtshim_vtab*)pBase;
vtshim_aux *pAux = pVtab->pAux;
int rc;
if( pAux->bDisposed ) return SQLITE_ERROR;
rc = pAux->pMod->xRollbackTo(pVtab->pChild, n);
if( rc!=SQLITE_OK ){
VTSHIM_COPY_ERRMSG();
}
return rc;
}
/* The destructor function for a disposible module */
static void vtshimAuxDestructor(void *pXAux){
vtshim_aux *pAux = (vtshim_aux*)pXAux;
assert( pAux->pAllVtab==0 );
if( !pAux->bDisposed && pAux->xChildDestroy ){
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