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Overview
| Comment: | Add experimental tointeger() and todouble() SQL functions. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | toTypeFuncs |
| Files: | files | file ages | folders |
| SHA1: |
465fd853d3e3544cb06b15ffa32ce257 |
| User & Date: | mistachkin 2013-03-11 01:23:37.658 |
Context
|
2013-03-11
| ||
| 06:24 | Add more tests. (check-in: f9468e334d user: mistachkin tags: toTypeFuncs) | |
| 01:23 | Add experimental tointeger() and todouble() SQL functions. (check-in: 465fd853d3 user: mistachkin tags: toTypeFuncs) | |
|
2013-03-09
| ||
| 14:49 | Add a test case for the problem fixed by the previous commit. (check-in: e899b058a7 user: dan tags: trunk) | |
Changes
Changes to src/func.c.
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assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
sqlite3_result_text(context, "NULL", 4, SQLITE_STATIC);
break;
}
}
}
/*
** EXPERIMENTAL - This is not an official function. The interface may
** change. This function may disappear. Do not write code that depends
** on this function.
**
** Implementation of the TOINTEGER() function. This function takes a
** single argument. If the argument is an integer or is a double that
** can be losslessly converted to an integer, the return value is the
** same as the argument. If the argument is a double that cannot be
** losslessly represented as an integer, the return value is undefined.
** If the argument is NULL, the return value is NULL. Otherwise, an
** attempt is made to convert the argument to an integer. If the
** conversion is successful, the integer value is returned; otherwise,
** NULL is returned.
*/
static void tointegerFunc(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
assert( argc==1 );
UNUSED_PARAMETER(argc);
switch( sqlite3_value_type(argv[0]) ){
case SQLITE_FLOAT:
case SQLITE_INTEGER: {
sqlite3_result_int64(context, sqlite3_value_int64(argv[0]));
break;
}
case SQLITE_BLOB:
case SQLITE_TEXT: {
const unsigned char *zStr = sqlite3_value_text(argv[0]);
if( zStr ){
int nStr = sqlite3_value_bytes(argv[0]);
if( nStr ){
i64 iVal;
if( !sqlite3Atoi64(zStr, &iVal, nStr, SQLITE_UTF8) ){
sqlite3_result_int64(context, iVal);
return;
}
}
}
sqlite3_result_null(context);
break;
}
default: {
assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
sqlite3_result_null(context);
break;
}
}
}
/*
** EXPERIMENTAL - This is not an official function. The interface may
** change. This function may disappear. Do not write code that depends
** on this function.
**
** Implementation of the TODOUBLE() function. This function takes a
** single argument. If the argument is a double or is an integer that
** can be losslessly converted to a double, the return value is the
** same as the argument. If the argument is an integer that cannot be
** losslessly represented as a double, the return value is undefined.
** If the argument is NULL, the return value is NULL. Otherwise, an
** attempt is made to convert the argument to a double. If the
** conversion is successful, the double value is returned; otherwise,
** NULL is returned.
*/
#ifndef SQLITE_OMIT_FLOATING_POINT
static void todoubleFunc(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
assert( argc==1 );
UNUSED_PARAMETER(argc);
switch( sqlite3_value_type(argv[0]) ){
case SQLITE_FLOAT:
case SQLITE_INTEGER: {
sqlite3_result_double(context, sqlite3_value_double(argv[0]));
break;
}
case SQLITE_BLOB:
case SQLITE_TEXT: {
const unsigned char *zStr = sqlite3_value_text(argv[0]);
if( zStr ){
int nStr = sqlite3_value_bytes(argv[0]);
if( nStr ){
double rVal;
if( sqlite3AtoF(zStr, &rVal, nStr, SQLITE_UTF8) ){
sqlite3_result_double(context, rVal);
return;
}
}
}
sqlite3_result_null(context);
break;
}
default: {
assert( sqlite3_value_type(argv[0])==SQLITE_NULL );
sqlite3_result_null(context);
break;
}
}
}
#endif
/*
** The unicode() function. Return the integer unicode code-point value
** for the first character of the input string.
*/
static void unicodeFunc(
sqlite3_context *context,
int argc,
|
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FUNCTION(sqlite_source_id, 0, 0, 0, sourceidFunc ),
FUNCTION(sqlite_log, 2, 0, 0, errlogFunc ),
#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
FUNCTION(sqlite_compileoption_used,1, 0, 0, compileoptionusedFunc ),
FUNCTION(sqlite_compileoption_get, 1, 0, 0, compileoptiongetFunc ),
#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */
FUNCTION(quote, 1, 0, 0, quoteFunc ),
FUNCTION(tointeger, 1, 0, 0, tointegerFunc ),
#ifndef SQLITE_OMIT_FLOATING_POINT
FUNCTION(todouble, 1, 0, 0, todoubleFunc ),
#endif
FUNCTION(last_insert_rowid, 0, 0, 0, last_insert_rowid),
FUNCTION(changes, 0, 0, 0, changes ),
FUNCTION(total_changes, 0, 0, 0, total_changes ),
FUNCTION(replace, 3, 0, 0, replaceFunc ),
FUNCTION(zeroblob, 1, 0, 0, zeroblobFunc ),
#ifdef SQLITE_SOUNDEX
FUNCTION(soundex, 1, 0, 0, soundexFunc ),
|
| ︙ |
Added test/func4.test.