iswxdigit

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



NAME
       iswxdigit - test for hexadecimal digit wide character

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 │
       └───────────────────────────────────────┴───────────────┴────────────────┘

CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C99.

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

SEE ALSO
       iswctype(3), isxdigit(3)

COLOPHON
       This page is part of release 5.12 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.



GNU                                2021-03-22                       ISWXDIGIT(3)