ISWDIGIT(3)						     Linux Programmer's Manual						       ISWDIGIT(3)

NAME

       iswdigit - test for decimal digit wide character

SYNOPSIS

       #include <wctype.h>

       int iswdigit(wint_t wc);

DESCRIPTION

       The  iswdigit() function is the wide-character equivalent of the isdigit(3) function.  It tests whether wc is a wide character belonging to
       the wide-character class "digit".

       The wide-character class "digit" is a subclass of the wide-character class "xdigit", and therefore also a subclass  of  the  wide-character
       class "alnum", of the wide-character class "graph" and of the wide-character class "print".

       Being a subclass of the wide character class "print", the wide-character class "digit" is disjoint from the wide-character class "cntrl".

       Being  a  subclass  of the wide-character class "graph", the wide-character class "digit" is disjoint from the wide-character class "space"
       and its subclass "blank".

       Being a subclass of the wide-character class "alnum", the wide-character class "digit" is disjoint from the wide-character class "punct".

       The wide-character class "digit" is disjoint from the wide-character class "alpha" and therefore also disjoint from its subclasses "lower",
       "upper".

       The wide-character class "digit" always contains exactly the digits '0' to '9'.

RETURN VALUE

       The  iswdigit()	function  returns  nonzero if wc is a wide character belonging to the wide-character class "digit".  Otherwise, it returns
       zero.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +-----------+---------------+----------------+
       |Interface  | Attribute	   | Value	    |
       +-----------+---------------+----------------+
       |iswdigit() | Thread safety | MT-Safe locale |
       +-----------+---------------+----------------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES

       The behavior of iswdigit() depends on the LC_CTYPE category of the current locale.

SEE ALSO

       isdigit(3), iswctype(3)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU
								    2015-08-08							       ISWDIGIT(3)