isspace, iswspace
int isspace( int c ); int iswspace( wint_t c );
Each of these routines returns nonzero if c is a particular representation of a space character.
Parameter
- c
- Integer to test.
Return Value
isspace returns a non-zero value if c is a white-space character (0x09 – 0x0D or 0x20). The result of the test condition for the isspace function depends on the LC_CTYPE category setting of the current locale; see setlocale for more information.
iswspace returns a non-zero value if c is a wide character that corresponds to a standard white-space character.
When used with a debug CRT library, isspace will display a CRT assert if passed a parameter that isn't EOF or in the range of 0 through 0xFF. When used with a debug CRT library, isspace will use the parameter as an index into an array, with undefined results if the parameter isn't EOF or in the range of 0 through 0xFF.
Generic-Text Routine Mappings
| TCHAR.H routine | _UNICODE & _MBCS not defined | _MBCS defined | _UNICODE defined |
|---|---|---|---|
| _istspace | isspace | _ismbcspace | iswspace |
Requirements
| Routine | Required header | Compatibility |
|---|---|---|
| isspace | <ctype.h> | ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP |
| iswspace | <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
