2 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
4 .\" SPDX-License-Identifier: GPL-2.0-or-later
6 .\" References consulted:
7 .\" GNU glibc-2 source code and manual
8 .\" Dinkumware C library reference http://www.dinkumware.com/
9 .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
12 .TH iswxdigit 3 (date) "Linux man-pages (unreleased)"
14 iswxdigit \- test for hexadecimal digit wide character
17 .RI ( libc ", " \-lc )
20 .B #include <wctype.h>
22 .BI "int iswxdigit(wint_t " wc );
27 function is the wide-character equivalent of the
33 belonging to the wide-character class "xdigit".
35 The wide-character class "xdigit" is a subclass of the wide-character class
36 "alnum", and therefore also a subclass of the wide-character class "graph" and
37 of the wide-character class "print".
39 Being a subclass of the wide-character class "print", the wide-character class
40 "xdigit" is disjoint from the wide-character class "cntrl".
42 Being a subclass of the wide-character class "graph", the wide-character class
43 "xdigit" is disjoint from the wide-character class "space" and its subclass
46 Being a subclass of the wide-character class "alnum", the wide-character class
47 "xdigit" is disjoint from the wide-character class "punct".
49 The wide-character class "xdigit" always contains at least the
50 letters \[aq]A\[aq] to \[aq]F\[aq], \[aq]a\[aq] to \[aq]f\[aq]
51 and the digits \[aq]0\[aq] to \[aq]9\[aq].
55 function returns nonzero if
58 belonging to the wide-character class "xdigit".
59 Otherwise, it returns zero.
61 For an explanation of the terms used in this section, see
67 Interface Attribute Value
72 T} Thread safety MT-Safe locale