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 char-
       acter 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-charac-
       ter class "cntrl".

       Being a subclass of the wide-character class "graph", the wide-character class "digit" is disjoint from the  wide-charac-
       ter 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-charac-
       ter 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".  Other-
       wise it returns zero.

CONFORMING TO
       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 3.25 of the Linux man-pages project.  A description of the project,  and  information  about
       reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



GNU                                                        1999-07-25                                                ISWDIGIT(3)