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
6 .\" the License, or (at your option) any later version.
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 ISWBLANK 3 2010-09-20 "GNU" "Linux Programmer's Manual"
16 iswblank \- test for whitespace wide character
19 .B #include <wctype.h>
21 .BI "int iswblank(wint_t " wc );
25 Feature Test Macro Requirements for glibc (see
26 .BR feature_test_macros (7)):
32 _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
33 _POSIX_C_SOURCE\ >=\ 200112L;
42 function is the wide-character equivalent of the
45 It tests whether \fIwc\fP is a wide character
46 belonging to the wide-character class "blank".
48 The wide-character class "blank" is a subclass of the wide-character class
51 Being a subclass of the wide-character class "space",
52 the wide-character class "blank" is disjoint from the
53 wide-character class "graph" and therefore also disjoint
54 from its subclasses "alnum", "alpha", "upper", "lower", "digit",
57 The wide-character class "blank" always contains
58 at least the space character
59 and the control character \(aq\\t\(aq.
63 function returns nonzero
64 if \fIwc\fP is a wide character
65 belonging to the wide-character class "blank".
66 Otherwise it returns zero.