WCTYPE(3)              FreeBSD Library Functions Manual              WCTYPE(3)

NAME
     iswctype, wctype - wide character class functions

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <wctype.h>

     int
     iswctype(wint_t wc, wctype_t charclass);

     wctype_t
     wctype(const char *property);

DESCRIPTION
     The wctype() function returns a value of type wctype_t which represents
     the requested wide character class and may be used as the second argument
     for calls to iswctype().

     The following character class names are recognised:

           alnum       cntrl       ideogram       print       space       xdigit
           alpha       digit       lower          punct       special
           blank       graph       phonogram      rune        upper

     The iswctype() function checks whether the wide character wc is in the
     character class charclass.

RETURN VALUES
     The iswctype() function returns non-zero if and only if wc has the
     property described by charclass, or charclass is zero.

     The wctype() function returns 0 if property is invalid, otherwise it
     returns a value of type wctype_t that can be used in subsequent calls to
     iswctype().

EXAMPLES
     Reimplement iswalpha(3) in terms of iswctype() and wctype():

           int
           myiswalpha(wint_t wc)
           {
                   return (iswctype(wc, wctype("alpha")));
           }

SEE ALSO
     ctype(3), nextwctype(3)

STANDARDS
     The iswctype() and wctype() functions conform to IEEE Std 1003.1-2001
     ("POSIX.1").  The "ideogram", "phonogram", "special", and "rune"
     character classes are extensions.

HISTORY
     The iswctype() and wctype() functions first appeared in FreeBSD 5.0.

FreeBSD 13.1-RELEASE-p6         March 27, 2004         FreeBSD 13.1-RELEASE-p6