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 ISWSPACE 3 1999-07-25 "GNU" "Linux Programmer's Manual"
18 iswspace \- test for whitespace wide character
21 .B #include <wctype.h>
23 .BI "int iswspace(wint_t " wc );
28 function is the wide-character equivalent of the
31 It tests whether \fIwc\fP is a wide character
32 belonging to the wide-character class "space".
34 The wide-character class "space" is disjoint from the wide-character class
35 "graph" and therefore also disjoint from its subclasses "alnum", "alpha",
36 "upper", "lower", "digit", "xdigit", "punct".
37 .\" Note: UNIX98 (susv2/xbd/locale.html) says that "space" and "graph" may
38 .\" have characters in common, except U+0020. But C99 (ISO/IEC 9899:1999
39 .\" section 7.25.2.1.10) says that "space" and "graph" are disjoint.
41 The wide-character class "space" contains the wide-character class "blank".
43 The wide-character class "space" always contains at least the space character
45 characters \(aq\\f\(aq, \(aq\\n\(aq, \(aq\\r\(aq, \(aq\\t\(aq, \(aq\\v\(aq.
49 function returns nonzero if \fIwc\fP is a wide character
50 belonging to the wide-character class "space".
51 Otherwise it returns zero.