/* This function is only available internally, it is not part of the
** external API. It works in a similar way to sqlite3_value_text(),
** except the data returned is in the encoding specified by the second
** parameter, which must be one of SQLITE_UTF16BE, SQLITE_UTF16LE or
** SQLITE_UTF8.
**
** (2006-02-16:) The enc value can be or-ed with SQLITE_UTF16_ALIGNED.
** If that is the case, then the result must be aligned on an even byte
** boundary.
*/
const void *sqlite3ValueText(sqlite3_value* pVal, u8 enc){
if( !pVal ) return 0;
assert( pVal->db==0 || sqlite3_mutex_held(pVal->db->mutex) );
assert( (enc&3)==(enc&~SQLITE_UTF16_ALIGNED) );
if( pVal->flags&MEM_Null ){
return 0;
}
assert( (MEM_Blob>>3) == MEM_Str );
pVal->flags |= (pVal->flags & MEM_Blob)>>3;
expandBlob(pVal);
if( pVal->flags&MEM_Str ){
sqlite3VdbeChangeEncoding(pVal, enc & ~SQLITE_UTF16_ALIGNED);
if( (enc & SQLITE_UTF16_ALIGNED)!=0 && 1==(1&SQLITE_PTR_TO_INT(pVal->z)) ){
assert( (pVal->flags & (MEM_Ephem|MEM_Static))!=0 );
if( sqlite3VdbeMemMakeWriteable(pVal)!=SQLITE_OK ){
return 0;
}
}
sqlite3VdbeMemNulTerminate(pVal);
}else{
assert( (pVal->flags&MEM_Blob)==0 );
sqlite3VdbeMemStringify(pVal, enc);
assert( 0==(1&(int)pVal->z) );
}
assert(pVal->enc==(enc & ~SQLITE_UTF16_ALIGNED) || pVal->db==0
|| pVal->db->mallocFailed );
if( pVal->enc==(enc & ~SQLITE_UTF16_ALIGNED) ){
return pVal->z;
}else{
return 0;
}
}
/*
** Return the best representation of pMem that we can get into a
** double. If pMem is already a double or an integer, return its
** value. If it is a string or blob, try to convert it to a double.
** If it is a NULL, return 0.0.
*/
double sqlite3VdbeRealValue(Mem *pMem) {
if( pMem->flags & MEM_Real ) {
return pMem->r;
} else if( pMem->flags & MEM_Int ) {
return (double)pMem->i;
} else if( pMem->flags & (MEM_Str|MEM_Blob) ) {
if( sqlite3VdbeChangeEncoding(pMem, SQLITE_UTF8)
|| sqlite3VdbeMemNulTerminate(pMem) ) {
return SQLITE_NOMEM;
}
assert( pMem->z );
return sqlite3AtoF(pMem->z, 0);
} else {
return 0.0;
}
}
/*
** Return some kind of integer value which is the best we can do
** at representing the value that *pMem describes as an integer.
** If pMem is an integer, then the value is exact. If pMem is
** a floating-point then the value returned is the integer part.
** If pMem is a string or blob, then we make an attempt to convert
** it into a integer and return that. If pMem is NULL, return 0.
**
** If pMem is a string, its encoding might be changed.
*/
i64 sqlite3VdbeIntValue(Mem *pMem) {
int flags = pMem->flags;
if( flags & MEM_Int ) {
return pMem->i;
} else if( flags & MEM_Real ) {
return (i64)pMem->r;
} else if( flags & (MEM_Str|MEM_Blob) ) {
i64 value;
if( sqlite3VdbeChangeEncoding(pMem, SQLITE_UTF8)
|| sqlite3VdbeMemNulTerminate(pMem) ) {
return SQLITE_NOMEM;
}
assert( pMem->z );
sqlite3atoi64(pMem->z, &value);
return value;
} else {
return 0;
}
}
/*
** Return the best representation of pMem that we can get into a
** double. If pMem is already a double or an integer, return its
** value. If it is a string or blob, try to convert it to a double.
** If it is a NULL, return 0.0.
*/
double sqlite3VdbeRealValue(Mem *pMem){
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
if( pMem->flags & MEM_Real ){
return pMem->r;
}else if( pMem->flags & MEM_Int ){
return (double)pMem->u.i;
}else if( pMem->flags & (MEM_Str|MEM_Blob) ){
double val = 0.0;
pMem->flags |= MEM_Str;
if( sqlite3VdbeChangeEncoding(pMem, SQLITE_UTF8)
|| sqlite3VdbeMemNulTerminate(pMem) ){
return 0.0;
}
assert( pMem->z );
sqlite3AtoF(pMem->z, &val);
return val;
}else{
return 0.0;
}
}
/*
** Return some kind of integer value which is the best we can do
** at representing the value that *pMem describes as an integer.
** If pMem is an integer, then the value is exact. If pMem is
** a floating-point then the value returned is the integer part.
** If pMem is a string or blob, then we make an attempt to convert
** it into a integer and return that. If pMem is NULL, return 0.
**
** If pMem is a string, its encoding might be changed.
*/
i64 sqlite3VdbeIntValue(Mem *pMem){
int flags;
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
flags = pMem->flags;
if( flags & MEM_Int ){
return pMem->u.i;
}else if( flags & MEM_Real ){
return doubleToInt64(pMem->r);
}else if( flags & (MEM_Str|MEM_Blob) ){
i64 value;
pMem->flags |= MEM_Str;
if( sqlite3VdbeChangeEncoding(pMem, SQLITE_UTF8)
|| sqlite3VdbeMemNulTerminate(pMem) ){
return 0;
}
assert( pMem->z );
sqlite3Atoi64(pMem->z, &value);
return value;
}else{
return 0;
}
}
/*
** Return the best representation of pMem that we can get into a
** double. If pMem is already a double or an integer, return its
** value. If it is a string or blob, try to convert it to a double.
** If it is a NULL, return 0.0.
*/
double sqlite3VdbeRealValue(Mem *pMem){
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
assert( EIGHT_BYTE_ALIGNMENT(pMem) );
if( pMem->flags & MEM_Real ){
return pMem->r;
}else if( pMem->flags & MEM_Int ){
return (double)pMem->u.i;
}else if( pMem->flags & (MEM_Str|MEM_Blob) ){
/* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
double val = (double)0;
pMem->flags |= MEM_Str;
if( sqlite3VdbeChangeEncoding(pMem, SQLITE_UTF8)
|| sqlite3VdbeMemNulTerminate(pMem) ){
/* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
return (double)0;
}
assert( pMem->z );
sqlite3AtoF(pMem->z, &val);
return val;
}else{
/* (double)0 In case of SQLITE_OMIT_FLOATING_POINT... */
return (double)0;
}
}
