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ISWUPPER(3P)               POSIX Programmer's Manual              ISWUPPER(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
       iswupper - test for an uppercase letter wide-character code
SYNOPSIS
       #include <wctype.h>
       int iswupper(wint_t wc);

DESCRIPTION
       The iswupper() function shall test whether wc is a wide-character  code
       representing  a  character  of  class  upper  in  the program's current
       locale; see the Base Definitions volume of IEEE Std 1003.1-2001,  Chap-
       ter 7, Locale.
       The  wc  argument is a wint_t, the value of which the application shall
       ensure is a wide-character code corresponding to a valid  character  in
       the  current  locale,  or  equal to the value of the macro WEOF. If the
       argument has any other value, the behavior is undefined.
RETURN VALUE
       The iswupper() function shall return non-zero if  wc  is  an  uppercase
       letter wide-character code; otherwise, it shall return 0.
ERRORS
       No errors are defined.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       To  ensure  applications  portability,  especially  across natural lan-
       guages, only this function and those listed in  the  SEE  ALSO  section
       should be used for classification of wide-character codes.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       iswalnum(), iswalpha(), iswcntrl(), iswctype(), iswdigit(), iswgraph(),
       iswlower(), iswprint(),  iswpunct(),  iswspace(),  iswxdigit(),  setlo-
       cale(), the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 7,
       Locale, <wchar.h>, <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                         ISWUPPER(3P)