1ISWDIGIT(3)                Linux Programmer's Manual               ISWDIGIT(3)
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NAME

6       iswdigit - test for decimal digit wide character
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SYNOPSIS

9       #include <wctype.h>
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11       int iswdigit(wint_t wc);
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DESCRIPTION

14       The  iswdigit()  function  is  the  wide-character  equivalent  of  the
15       isdigit() function. It tests whether wc is a wide  character  belonging
16       to the wide character class "digit".
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18       The  wide  character  class "digit" is a subclass of the wide character
19       class "xdigit", and therefore also a subclass  of  the  wide  character
20       class  "alnum",  of  the  wide  character class "graph" and of the wide
21       character class "print".
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23       Being a subclass of the wide character class "print", the wide  charac‐
24       ter class "digit" is disjoint from the wide character class "cntrl".
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26       Being  a subclass of the wide character class "graph", the wide charac‐
27       ter class "digit" is disjoint from the wide character class "space" and
28       its subclass "blank".
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30       Being  a subclass of the wide character class "alnum", the wide charac‐
31       ter class "digit" is disjoint from the wide character class "punct".
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33       The wide character class "digit" is disjoint from  the  wide  character
34       class  "alpha" and therefore also disjoint from its subclasses "lower",
35       "upper".
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37       The wide character class "digit" always contains exactly the digits '0'
38       to '9'.
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RETURN VALUE

41       The  iswdigit()  function  returns  non-zero  if wc is a wide character
42       belonging to the wide character class  "digit".  Otherwise  it  returns
43       zero.
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CONFORMING TO

46       C99.
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SEE ALSO

49       isdigit(3), iswctype(3)
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NOTES

52       The  behaviour  of  iswdigit()  depends on the LC_CTYPE category of the
53       current locale.
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57GNU                               1999-07-25                       ISWDIGIT(3)