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WCTYPE(3)                BSD Library Functions Manual                WCTYPE(3)

NAME
     iswctype, iswctype_l, wctype, wctype_l -- 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);

     #include <wctype.h>
     #include <xlocale.h>

     int
     iswctype_l(wint_t wc, wctype_t charclass, locale_t loc);

     wctype_t
     wctype_l(const char *property, locale_t loc);

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.

     Although the iswctype() and wctype() functions use the current locale, the iswctype_l() and wctype_l()
     functions may be passed locales directly. See xlocale(3) for more information.

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), xlocale(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.

BSD                             March 27, 2004                             BSD

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