wctype(3)

NAME#

wctype - wide-character classification

LIBRARY#

Standard C library (libc, -lc)

SYNOPSIS#

#include <wctype.h>

wctype_t wctype(const char *\nname\n);

DESCRIPTION#

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.

\n
    "alnum" - realizes the \nisalnum\n(3) classification function
\n
    "alpha" - realizes the \nisalpha\n(3) classification function
\n
    "blank" - realizes the \nisblank\n(3) classification function
\n
    "cntrl" - realizes the \niscntrl\n(3) classification function
\n
    "digit" - realizes the \nisdigit\n(3) classification function
\n
    "graph" - realizes the \nisgraph\n(3) classification function
\n
    "lower" - realizes the \nislower\n(3) classification function
\n
    "print" - realizes the \nisprint\n(3) classification function
\n
    "punct" - realizes the \nispunct\n(3) classification function
\n
    "space" - realizes the \nisspace\n(3) classification function
\n
    "upper" - realizes the \nisupper\n(3) classification function
\n
    "xdigit" - realizes the \nisxdigit\n(3) classification function

RETURN VALUE#

The wctype() function returns a property descriptor if the name is valid. Otherwise, it returns (wctype_t) 0.

ATTRIBUTES#

For an explanation of the terms used in this section, see attributes(7).

STANDARDS#

C11, POSIX.1-2008.

HISTORY#

POSIX.1-2001, C99.

NOTES#

The behavior of wctype() depends on the LC_CTYPE category of the current locale.

SEE ALSO#

iswctype(3)