ISWDIGIT(3P)                                        POSIX Programmer's Manual                                       ISWDIGIT(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
       iswdigit - test for a decimal digit wide-character code

SYNOPSIS
       #include <wctype.h>

       int iswdigit(wint_t wc);


DESCRIPTION
       The  iswdigit()  function  shall  test whether wc is a wide-character code representing a character of class digit in the
       program's current locale; see the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 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 iswdigit() function shall return non-zero if wc is a decimal digit 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 languages, 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(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(),
       iswxdigit(), setlocale(), 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, 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                                                  ISWDIGIT(3P)