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

6       iswxdigit - test for hexadecimal digit wide character
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SYNOPSIS

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

14       The  iswxdigit()  function  is  the  wide-character  equivalent  of the
15       isxdigit(3) function.  It tests whether wc is a wide character  belong‐
16       ing to the wide-character class "xdigit".
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18       The  wide-character  class "xdigit" is a subclass of the wide-character
19       class "alnum", and therefore also  a  subclass  of  the  wide-character
20       class "graph" and of the wide-character class "print".
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22       Being  a subclass of the wide-character class "print", the wide-charac‐
23       ter class "xdigit" is disjoint from the wide-character class "cntrl".
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25       Being a subclass of the wide-character class "graph", the  wide-charac‐
26       ter  class  "xdigit"  is disjoint from the wide-character class "space"
27       and its subclass "blank".
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29       Being a subclass of the wide-character class "alnum", the  wide-charac‐
30       ter class "xdigit" is disjoint from the wide-character class "punct".
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32       The  wide-character class "xdigit" always contains at least the letters
33       'A' to 'F', 'a' to 'f' and the digits '0' to '9'.
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RETURN VALUE

36       The iswxdigit() function returns nonzero if wc is a wide character  be‐
37       longing  to  the  wide-character class "xdigit".  Otherwise, it returns
38       zero.
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ATTRIBUTES

41       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
42       tributes(7).
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44       ┌─────────────────────────────────────┬───────────────┬────────────────┐
45       │Interface                            │ Attribute     │ Value          │
46       ├─────────────────────────────────────┼───────────────┼────────────────┤
47       │iswxdigit()                          │ Thread safety │ MT-Safe locale │
48       └─────────────────────────────────────┴───────────────┴────────────────┘
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CONFORMING TO

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

54       The  behavior  of  iswxdigit()  depends on the LC_CTYPE category of the
55       current locale.
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SEE ALSO

58       iswctype(3), isxdigit(3)
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COLOPHON

61       This page is part of release 5.12 of the Linux  man-pages  project.   A
62       description  of  the project, information about reporting bugs, and the
63       latest    version    of    this    page,    can     be     found     at
64       https://www.kernel.org/doc/man-pages/.
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68GNU                               2021-03-22                      ISWXDIGIT(3)
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