isspace, iswspace, _isspace_l, _iswspace_l
Determines whether an integer represents a space character.
int isspace( int c ); int iswspace( wint_t c ); int _isspace_l( int c, _locale_t locale ); int _iswspace_l( wint_t c, _locale_t locale );
Each of these routines returns nonzero if c is a particular representation of a space character. isspace returns a nonzero 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 locale; see setlocale, _wsetlocale for more information. The versions of these functions that do not have the _l suffix use the current locale for any locale-dependent behavior; the versions that do have the _l suffix are identical except that they use the locale that's passed in instead. For more information, see Locale.
iswspace returns a nonzero value if c is a wide character that corresponds to a standard white-space character.
The behavior of isspace and _isspace_l is undefined if c is not EOF or in the range 0 through 0xFF, inclusive. When a debug CRT library is used and c is not one of these values, the functions raise an assertion.
|
TCHAR.H routine |
_UNICODE & _MBCS not defined |
_MBCS defined |
_UNICODE defined |
|---|---|---|---|
|
_ istspace |
isspace |
iswspace |
|
Routine |
Required header |
|---|---|
|
isspace |
<ctype.h> |
|
iswspace |
<ctype.h> or <wchar.h> |
|
_isspace_l |
<ctype.h> |
|
_iswspace_l |
<ctype.h> or <wchar.h> |
For additional compatibility information, see Compatibility.
