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 4.09 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/.

---

Free and Open Source Software