iswxdigit(3) — Linux manual page

iswxdigit(3)            Library Functions Manual            iswxdigit(3)

NAME

       iswxdigit - test for hexadecimal digit wide character

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <wctype.h>

       int iswxdigit(wint_t wc);

DESCRIPTION

       The iswxdigit() function is the wide-character equivalent of the
       isxdigit(3) function.  It tests whether wc is a wide character
       belonging to the wide-character class "xdigit".

       The wide-character class "xdigit" is a subclass of the wide-
       character class "alnum", and therefore also a subclass 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 "xdigit" is disjoint from the wide-character
       class "cntrl".

       Being a subclass of the wide-character class "graph", the wide-
       character class "xdigit" 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 "xdigit" is disjoint from the wide-character
       class "punct".

       The wide-character class "xdigit" always contains at least the
       letters 'A' to 'F', 'a' to 'f' and the digits '0' to '9'.

RETURN VALUE

       The iswxdigit() function returns nonzero if wc is a wide
       character belonging to the wide-character class "xdigit".
       Otherwise, it returns zero.

ATTRIBUTES

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────┬───────────────┬────────────────┐
       │ Interface                    │ Attribute     │ Value          │
       ├──────────────────────────────┼───────────────┼────────────────┤
       │ iswxdigit()                  │ Thread safety │ MT-Safe locale │
       └──────────────────────────────┴───────────────┴────────────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

       The behavior of iswxdigit() depends on the LC_CTYPE category of
       the current locale.

SEE ALSO

       iswctype(3), isxdigit(3)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                   iswxdigit(3)

Pages that refer to this page: isalpha(3), iswctype(3)

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