__isascii, iswascii
int __isascii( int c ); int iswascii( wint_t c );
Each of these routines returns nonzero if c is a particular representation of an ASCII character.
Parameter
- c
- Integer to test.
Return Value
__isascii returns a non-zero value if c is an ASCII character (in the range 0x00 – 0x7F). iswascii returns a non-zero value if c is a wide-character representation of an ASCII character. Each of these routines returns 0 if c does not satisfy the test condition.
The result of the test condition for the __isascii function depends on the LC_CTYPE category setting of the current locale; see setlocale for more information. For iswascii, the result of the test condition is independent of locale.
Generic-Text Routine Mappings
| TCHAR.H routine | _UNICODE & _MBCS not defined | _MBCS defined | _UNICODE defined |
|---|---|---|---|
| _istascii | isascii | isascii | iswascii |
Requirements
| Routine | Required header | Compatibility |
|---|---|---|
| __isascii | <ctype.h> | Win 98, Win Me, Win NT, Win 2000, Win XP |
| iswascii | <ctype.h> or <wchar.h> | ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP |
For additional compatibility information, see Compatibility in the Introduction.
Libraries
All versions of the C run-time libraries.
See Also
Character Classification Routines | Locale Routines | is, isw Function Overview | Run-Time Routines and .NET Framework Equivalents
