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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  belong-
     ing 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-charac-
     ter class "xdigit" is disjoint from the wide-character class "cntrl".

     Being a subclass of the wide-character class "graph", the  wide-charac-
     ter  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-charac-
     ter 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.