1 /* Test of isblank() function.
2 Copyright (C) 2009-2020 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Bruno Haible <bruno@clisp.org>, 2009. */
18
19 #include <config.h>
20
21 #include <ctype.h>
22
23 #include "signature.h"
24 SIGNATURE_CHECK (isblank, int, (int));
25
26 #include <limits.h>
27 #include <stdio.h>
28
29 #include "macros.h"
30
31 int
main(int argc,char * argv[])32 main (int argc, char *argv[])
33 {
34 unsigned int c;
35
36 /* Verify the property in the "C" locale.
37 POSIX specifies in
38 <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html>
39 that
40 - in all locales, the blank characters include the <space> and <tab>
41 characters,
42 - in the "POSIX" locale (which is usually the same as the "C" locale),
43 the blank characters include only the ASCII <space> and <tab>
44 characters. */
45 for (c = 0; c <= UCHAR_MAX; c++)
46 ASSERT (!isblank (c) == !(c == ' ' || c == '\t'));
47 ASSERT (!isblank (EOF));
48
49 return 0;
50 }
51