toupper, _toupper, towupper, _toupper_l, _towupper_l
Convert character to uppercase.
int toupper( int c ); int _toupper( int c ); int towupper( wint_t c ); int _toupper_l( int c , _locale_t locale ); int _towupper_l( wint_t c , _locale_t locale );
Each of these routines converts a copy of c, if possible, and returns the result.
If c is a wide character for which iswlower is nonzero and there is a corresponding wide character for which iswupper is nonzero, towupper returns the corresponding wide character; otherwise, towupper returns c unchanged.
There is no return value reserved to indicate an error.
In order for toupper to give the expected results, __isascii and islower must both return nonzero.
Each of these routines converts a given lowercase letter to an uppercase letter if possible and appropriate. The case conversion of towupper is locale-specific. Only the characters relevant to the current locale are changed in case. The functions without the _l suffix use the currently set locale. The versions of these functions with the _l suffix take the locale as a parameter and use that instead of the currently set locale. For more information, see Locale.
In order for toupper to give the expected results, __isascii and isupper must both return nonzero.
|
TCHAR.H routine |
_UNICODE & _MBCS not defined |
_MBCS defined |
_UNICODE defined |
|---|---|---|---|
|
_totupper |
toupper |
_mbctoupper |
towupper |
|
_totupper_l |
_toupper_l |
_mbctoupper_l |
_towupper_l |
Note
|
|---|
|
_toupper_l and _towupper_l have no locale dependence and are not meant to be called directly. They are provided for internal use by _totupper_l. |
|
Routine |
Required header |
|---|---|
|
toupper |
<ctype.h> |
|
_toupper |
<ctype.h> |
|
towupper |
<ctype.h> or <wchar.h> |
For additional compatibility information, see Compatibility in the Introduction.
See the example in to Functions.
