1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
3 .\" %%%LICENSE_START(GPLv2+_ONEPARA_DOC)
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 2010-09-20 "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.