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 (consult the correspond-
       ing 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(), 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 Technol-
       ogy -- 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							      ISWDIGIT(3P)