1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
3 .\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
4 .\" This is free documentation; you can redistribute it and/or
5 .\" modify it under the terms of the GNU General Public License as
6 .\" published by the Free Software Foundation; either version 2 of
7 .\" the License, or (at your option) any later version.
10 .\" References consulted:
11 .\" GNU glibc-2 source code and manual
12 .\" Dinkumware C library reference http://www.dinkumware.com/
13 .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
16 .TH ISWCNTRL 3 2014-02-10 "GNU" "Linux Programmer's Manual"
18 iswcntrl \- test for control wide character
21 .B #include <wctype.h>
23 .BI "int iswcntrl(wint_t " wc );
28 function is the wide-character equivalent of the
34 belonging to the wide-character class "cntrl".
36 The wide-character class "cntrl" is disjoint from the wide-character class
37 "print" and therefore also disjoint from its subclasses "graph", "alpha",
38 "upper", "lower", "digit", "xdigit", "punct".
44 .IR iswcntrl(btowc(c)) ,
49 function returns nonzero if
52 wide character belonging to the wide-character class "cntrl".
53 Otherwise, it returns zero.
55 .SS Multithreading (see pthreads(7))
58 function is thread-safe with exceptions.
59 It can be safely used in multithreaded applications, as long as
61 is not called to change the locale during its execution.
75 This page is part of release 3.76 of the Linux
78 A description of the project,
79 information about reporting bugs,
80 and the latest version of this page,
82 \%http://www.kernel.org/doc/man\-pages/.