bionic (3) iswdigit.3.gz

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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
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