WCTYPE(3P)                                          POSIX Programmer's Manual                                         WCTYPE(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

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 iswc-
       type().  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,  Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                    WCTYPE(3P)