Manpages - wctype.3

wctype - wide-character classification

  #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 isalnum(3) classification function
      "alpha" - realizes the isalpha(3) classification function
      "blank" - realizes the isblank(3) classification function
      "cntrl" - realizes the iscntrl(3) classification function
      "digit" - realizes the isdigit(3) classification function
      "graph" - realizes the isgraph(3) classification function
      "lower" - realizes the islower(3) classification function
      "print" - realizes the isprint(3) classification function
      "punct" - realizes the ispunct(3) classification function
      "space" - realizes the isspace(3) classification function
      "upper" - realizes the isupper(3) classification function
      "xdigit" - realizes the isxdigit(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).

POSIX.1-2001, POSIX.1-2008, C99.

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

*iswctype*(3)

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