wctype - wide-character classification
Standard C library (libc, -lc)
#include <wctype.h>
wctype_t wctype(const char *name);The wctype_t type represents a property which a wide
character may or may not have. In other words, it represents a class of
wide characters. This type's nature is implementation-dependent, but the
special value (wctype_t) 0 denotes an invalid property. Nonzero
wctype_t values can be passed to the
iswctype(3) function to actually test whether a given
wide character has the property.
The wctype() function returns a property, given by its name. The set of valid names depends on the LC_CTYPE category of the current locale, but the following names are valid in all locales.
| "alnum" - | realizes the f[B]isalnumf[](3) classification function |
| "alpha" - | realizes the f[B]isalphaf[](3) classification function |
| "blank" - | realizes the f[B]isblankf[](3) classification function |
| "cntrl" - | realizes the f[B]iscntrlf[](3) classification function |
| "digit" - | realizes the f[B]isdigitf[](3) classification function |
| "graph" - | realizes the f[B]isgraphf[](3) classification function |
| "lower" - | realizes the f[B]islowerf[](3) classification function |
| "print" - | realizes the f[B]isprintf[](3) classification function |
| "punct" - | realizes the f[B]ispunctf[](3) classification function |
| "space" - | realizes the f[B]isspacef[](3) classification function |
| "upper" - | realizes the f[B]isupperf[](3) classification function |
| "xdigit" - | realizes the f[B]isxdigitf[](3) classification function |
The wctype() function returns a property descriptor
if the name is valid. Otherwise, it returns (wctype_t)
0.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
wctype() |
Thread safety | MT-Safe locale |
C11, POSIX.1-2008.
POSIX.1-2001, C99.
The behavior of wctype() depends on the LC_CTYPE category of the current locale.
iswctype(3)