_isctype, iswctype, _isctype_l, _iswctype_l
Tests c for the property specified by the desc argument. For each valid value of desc, there is an equivalent wide-character classification routine.
int _isctype(
int c,
_ctype_t desc
);
int _isctype_l(
int c,
_ctype_t desc,
_locale_t locale
);
int iswctype(
wint_t c,
wctype_t desc
);
int _iswctype_l(
wint_t c,
wctype_t desc,
_locale_t locale
);
Parameters
c
Integer to test.desc
Property to test for. This is normally retrieved using ctype or wctype.locale
The locale to use for any locale-dependent tests.
Return Value
_isctype and iswctype return a nonzero value if c has the property specified by desc in the current locale or 0 if it does not. The versions of these functions with the _l suffix are identical except that they use the locale passed in instead of the current locale for their locale-dependent behavior. For more information, see Locale.
The behavior of _isctype and _isctype_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.
Generic-Text Routine Mappings
Tchar.h routine |
_UNICODE and _MBCS not defined |
_MBCS defined |
_UNICODE defined |
|---|---|---|---|
n/a |
_isctype |
n/a |
_iswctype |
n/a |
_isctype_l |
n/a |
_iswctype_l |
Requirements
Routine |
Required header |
|---|---|
_isctype |
<ctype.h> |
iswctype |
<ctype.h> or <wchar.h> |
_isctype_l |
<ctype.h> |
_iswctype_l |
<ctype.h> or <wchar.h> |
For more compatibility information, see Compatibility in the Introduction.
Libraries
All versions of the C run-time libraries.
.NET Framework Equivalent
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.