wctype(3)

WCTYPE(3)                  Linux Programmer's Manual                 WCTYPE(3)

NAME
       wctype - wide character classification

SYNOPSIS
       #include <wctype.h>

       wctype_t wctype(const char *name);

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

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

CONFORMING TO
       C99.

SEE ALSO
       iswctype(3)

NOTES
       The  behaviour of wctype() depends on the LC_CTYPE category of the cur-
       rent locale.

GNU                               1999-07-25                         WCTYPE(3)