ISWDIGIT(T)         Linux Programmer's Manual         ISWDIGIT(T)



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 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
       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  non-zero if wc is a wide
       character belonging to the wide character  class  "digit".
       Otherwise it returns zero.

CONFORMING TO
       ISO/ANSI C, UNIX98

SEE ALSO
       isdigit(t), iswctype(e)

NOTES
       The behaviour of iswdigit depends on the LC_CTYPE category
       of the current locale.



GNU                         1999-07-25                ISWDIGIT(T)