.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
.\"
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.\" References consulted:
.\"   GNU glibc-2 source code and manual
.\"   Dinkumware C library reference http://www.dinkumware.com/
.\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
.\"   ISO/IEC 9899:1999
.\"
.TH ISWXDIGIT 3  1999-07-25 "GNU" "Linux Programmer's Manual"
.SH NAME
iswxdigit \- test for hexadecimal digit wide character
.SH SYNOPSIS
.nf
.B #include <wctype.h>
.sp
.BI "int iswxdigit(wint_t " wc );
.fi
.SH DESCRIPTION
The
.BR iswxdigit ()
function is the wide-character equivalent of the
.BR isxdigit (3)
function.
It tests whether
.I wc
is a wide character
belonging to the wide-character class "xdigit".
.PP
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".
.PP
Being a subclass of the wide-character class "print", the wide-character class
"xdigit" is disjoint from the wide-character class "cntrl".
.PP
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".
.PP
Being a subclass of the wide-character class "alnum", the wide-character class
"xdigit" is disjoint from the wide-character class "punct".
.PP
The wide-character class "xdigit" always contains at least the
letters \(aqA\(aq to \(aqF\(aq, \(aqa\(aq to \(aqf\(aq
and the digits \(aq0\(aq to \(aq9\(aq.
.SH RETURN VALUE
The
.BR iswxdigit ()
function returns nonzero if
.I wc
is a wide character
belonging to the wide-character class "xdigit".
Otherwise, it returns zero.
.SH CONFORMING TO
C99.
.SH NOTES
The behavior of
.BR iswxdigit ()
depends on the
.B LC_CTYPE
category of the
current locale.
.SH SEE ALSO
.BR iswctype (3),
.BR isxdigit (3)
.SH COLOPHON
This page is part of release 3.74 of the Linux
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%http://www.kernel.org/doc/man\-pages/.