1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
3 .\" This is free documentation; you can redistribute it and/or
4 .\" modify it under the terms of the GNU General Public License as
5 .\" published by the Free Software Foundation; either version 2 of
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8 .\" References consulted:
9 .\" GNU glibc-2 source code and manual
10 .\" Dinkumware C library reference http://www.dinkumware.com/
11 .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
14 .TH ISWXDIGIT 3 1999-07-25 "GNU" "Linux Programmer's Manual"
16 iswxdigit \- test for hexadecimal digit wide character
19 .B #include <wctype.h>
21 .BI "int iswxdigit(wint_t " wc );
26 function is the wide-character equivalent of the
29 It tests whether \fIwc\fP is a wide character
30 belonging to the wide-character class "xdigit".
32 The wide-character class "xdigit" is a subclass of the wide-character class
33 "alnum", and therefore also a subclass of the wide-character class "graph" and
34 of the wide-character class "print".
36 Being a subclass of the wide-character class "print", the wide-character class
37 "xdigit" is disjoint from the wide-character class "cntrl".
39 Being a subclass of the wide-character class "graph", the wide-character class
40 "xdigit" is disjoint from the wide-character class "space" and its subclass
43 Being a subclass of the wide-character class "alnum", the wide-character class
44 "xdigit" is disjoint from the wide-character class "punct".
46 The wide-character class "xdigit" always contains at least the
47 letters \(aqA\(aq to \(aqF\(aq, \(aqa\(aq to \(aqf\(aq
48 and the digits \(aq0\(aq to \(aq9\(aq.
52 function returns nonzero if \fIwc\fP is a wide character
53 belonging to the wide-character class "xdigit".
54 Otherwise it returns zero.