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/* Test of isblank() function.
Copyright (C) 2009-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2009. */
#include <config.h>
#include <ctype.h>
#include "signature.h"
SIGNATURE_CHECK (isblank, int, (int));
#include <limits.h>
#include <stdio.h>
#include "macros.h"
int
main (int argc, char *argv[])
{
unsigned int c;
/* Verify the property in the "C" locale.
POSIX specifies in
<https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html>
that
- in all locales, the blank characters include the <space> and <tab>
characters,
- in the "POSIX" locale (which is usually the same as the "C" locale),
the blank characters include only the ASCII <space> and <tab>
characters. */
for (c = 0; c <= UCHAR_MAX; c++)
ASSERT (!isblank (c) == !(c == ' ' || c == '\t'));
ASSERT (!isblank (EOF));
return 0;
}
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