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 ISWBLANK 3 2014-02-10 "GNU" "Linux Programmer's Manual"
18 iswblank \- test for whitespace wide character
21 .B #include <wctype.h>
23 .BI "int iswblank(wint_t " wc );
27 Feature Test Macro Requirements for glibc (see
28 .BR feature_test_macros (7)):
34 _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
35 _POSIX_C_SOURCE\ >=\ 200112L;
44 function is the wide-character equivalent of the
47 It tests whether \fIwc\fP is a wide character
48 belonging to the wide-character class "blank".
50 The wide-character class "blank" is a subclass of the wide-character class
53 Being a subclass of the wide-character class "space",
54 the wide-character class "blank" is disjoint from the
55 wide-character class "graph" and therefore also disjoint
56 from its subclasses "alnum", "alpha", "upper", "lower", "digit",
59 The wide-character class "blank" always contains
60 at least the space character
61 and the control character \(aq\\t\(aq.
65 function returns nonzero
66 if \fIwc\fP is a wide character
67 belonging to the wide-character class "blank".
68 Otherwise, it returns zero.
70 .SS Multithreading (see pthreads(7))
73 function is thread-safe with exceptions.
74 It can be safely used in multithreaded applications, as long as
76 is not called to change the locale during its execution.
90 This page is part of release 3.78 of the Linux
93 A description of the project,
94 information about reporting bugs,
95 and the latest version of this page,
97 \%http://www.kernel.org/doc/man\-pages/.