NAME

       wctype - define character class

SYNOPSIS

       #include <wctype.h>

       wctype_t wctype(const char *property);

DESCRIPTION

       The wctype() function is defined for valid character class names as defined in the current
       locale. The property argument is a string identifying a generic character class for  which
       codeset-specific  type  information is required. The following character class names shall
       be defined in all locales:

          alnum                        digit                        punct
          alpha                        graph                        space
          blank                        lower                        upper
          cntrl                        print                        xdigit

       Additional character class names defined in the locale definition file (category  LC_CTYPE
       ) can also be specified.

       The  function  shall  return  a  value  of  type wctype_t, which can be used as the second
       argument to subsequent calls of iswctype().  The wctype() function shall determine  values
       of  wctype_t  according  to the rules of the coded character set defined by character type
       information in the program's locale (category LC_CTYPE ). The values returned by  wctype()
       shall be valid until a call to setlocale() that modifies the category LC_CTYPE .

RETURN VALUE

       The  wctype()  function  shall return 0 if the given character class name is not valid for
       the current locale (category LC_CTYPE ); otherwise, it shall  return  an  object  of  type
       wctype_t that can be used in calls to iswctype().

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       iswctype() , the Base Definitions volume of IEEE Std 1003.1-2001, <wctype.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .