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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 (consult 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 corre-
       sponding 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-character code.   All  other  argu-
       ments in the domain are returned unchanged.
RETURN VALUE
       Upon  successful completion, towupper() shall return the uppercase let-
       ter 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, Chap-
       ter 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,  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                         TOWUPPER(3P)