TOWUPPER(3P)                                        POSIX Programmer's Manual                                       TOWUPPER(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
       towupper - transliterate lowercase wide-character code to uppercase

SYNOPSIS
       #include <wctype.h>

       wint_t towupper(wint_t wc);


DESCRIPTION
       The  towupper()  function  has  as a domain a type wint_t, the value of which the application shall ensure is a character
       representable as a wchar_t, and a wide-character code corresponding to a valid character in the  current  locale  or  the
       value of WEOF. If the argument has any other value, the behavior is undefined. If the argument of towupper() represents a
       lowercase wide-character code, and there exists a corresponding uppercase wide-character code (as  defined  by  character
       type  information in the program locale category LC_CTYPE ), the result shall be the corresponding uppercase wide-charac-
       ter code.  All other arguments in the domain are returned unchanged.

RETURN VALUE
       Upon successful completion, towupper() shall return the uppercase letter corresponding to the argument passed. Otherwise,
       it shall return the argument unchanged.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       setlocale(), the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <wctype.h>, <wchar.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                                                  TOWUPPER(3P)