/*
** Bind a text or BLOB value.
*/
static int bindText(
sqlite3_stmt *pStmt, /* The statement to bind against */
int i, /* Index of the parameter to bind */
const void *zData, /* Pointer to the data to be bound */
int nData, /* Number of bytes of data to be bound */
void (*xDel)(void*), /* Destructor for the data */
u8 encoding /* Encoding for the data */
){
Vdbe *p = (Vdbe *)pStmt;
Mem *pVar;
int rc;
rc = vdbeUnbind(p, i);
if( rc==SQLITE_OK ){
if( zData!=0 ){
pVar = &p->aVar[i-1];
rc = sqlite3VdbeMemSetStr(pVar, zData, nData, encoding, xDel);
if( rc==SQLITE_OK && encoding!=0 ){
rc = sqlite3VdbeChangeEncoding(pVar, ENC(p->db));
}
sqlite3Error(p->db, rc);
rc = sqlite3ApiExit(p->db, rc);
}
sqlite3_mutex_leave(p->db->mutex);
}else if( xDel!=SQLITE_STATIC && xDel!=SQLITE_TRANSIENT ){
xDel((void*)zData);
}
return rc;
}
static int invokeValueDestructor(
const void *p, /* Value to destroy */
void (*xDel)(void*), /* The destructor */
sqlite3_context *pCtx /* Set a SQLITE_TOOBIG error if no NULL */
){
assert( xDel!=SQLITE_DYNAMIC );
if( xDel==0 ){
/* noop */
}else if( xDel==SQLITE_TRANSIENT ){
/* noop */
}else{
xDel((void*)p);
}
if( pCtx ) sqlite3_result_error_toobig(pCtx);
return SQLITE_TOOBIG;
}
/*
** This routine checks for a byte-order mark at the beginning of the
** UTF-16 string stored in *pMem. If one is present, it is removed and
** the encoding of the Mem adjusted. This routine does not do any
** byte-swapping, it just sets Mem.enc appropriately.
**
** The allocation (static, dynamic etc.) and encoding of the Mem may be
** changed by this function.
*/
int sqlite3VdbeMemHandleBom(Mem *pMem){
int rc = SQLITE_OK;
u8 bom = 0;
if( pMem->n<0 || pMem->n>1 ){
u8 b1 = *(u8 *)pMem->z;
u8 b2 = *(((u8 *)pMem->z) + 1);
if( b1==0xFE && b2==0xFF ){
bom = SQLITE_UTF16BE;
}
if( b1==0xFF && b2==0xFE ){
bom = SQLITE_UTF16LE;
}
}
if( bom ){
/* This function is called as soon as a string is stored in a Mem*,
** from within sqlite3VdbeMemSetStr(). At that point it is not possible
** for the string to be stored in Mem.zShort, or for it to be stored
** in dynamic memory with no destructor.
*/
assert( !(pMem->flags&MEM_Short) );
assert( !(pMem->flags&MEM_Dyn) || pMem->xDel );
if( pMem->flags & MEM_Dyn ){
void (*xDel)(void*) = pMem->xDel;
char *z = pMem->z;
pMem->z = 0;
pMem->xDel = 0;
rc = sqlite3VdbeMemSetStr(pMem, &z[2], pMem->n-2, bom, SQLITE_TRANSIENT);
xDel(z);
}else{
rc = sqlite3VdbeMemSetStr(pMem, &pMem->z[2], pMem->n-2, bom,
SQLITE_TRANSIENT);
}
}
return rc;
}
