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, wctype_l — define character class

SYNOPSIS

       #include <wctype.h>

       wctype_t wctype(const char *property);
       wctype_t wctype_l(const char *property, locale_t locale);

DESCRIPTION

       For  wctype(): The functionality described on this reference page is aligned with the ISO C standard. Any
       conflict between the requirements described here and the ISO C standard is unintentional. This volume  of
       POSIX.1‐2008 defers to the ISO C standard.

       The  wctype()  and  wctype_l()  functions  are  defined for valid character class names as defined in the
       current locale or in the locale represented by locale, respectively.

       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.

       These functions shall return a value of type wctype_t, which can  be  used  as  the  second  argument  to
       subsequent calls of iswctype() and iswctype_l().

       The  wctype()  and  wctype_l() functions shall determine values of wctype_t according to the rules of the
       coded character set defined by character type  information  in  the  current  locale  or  in  the  locale
       represented by locale, respectively (category LC_CTYPE).

       The  values  returned  by  wctype() shall be valid until a call to setlocale() that modifies the category
       LC_CTYPE.

       The values returned by wctype_l() shall be valid only in calls to iswctype_l() with a locale  represented
       by locale with the same LC_CTYPE category value.

       The  behavior  is  undefined  if  the  locale  argument  to  wctype_l()  is  the  special  locale  object
       LC_GLOBAL_LOCALE or is not a valid locale object handle.

RETURN VALUE

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

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 POSIX.1‐2008, <wctype.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers,  Inc
       and  The  Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .