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)

GNU                                                                            2021-03-22                                                                   ISWXDIGIT(3)