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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 (consult 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 iden-
       tifying 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 .

IEEE/The Open Group                  2003                           WCTYPE(3P)