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