50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Test of isblank() function.
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Copyright (C) 2009-2025 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2009. */
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#include <config.h>
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#include <ctype.h>
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#include "signature.h"
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SIGNATURE_CHECK (isblank, int, (int));
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#include <limits.h>
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#include <stdio.h>
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#include "macros.h"
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int
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main ()
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{
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unsigned int c;
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/* Verify the property in the "C" locale.
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POSIX specifies in
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<https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html>
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that
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- in all locales, the blank characters include the <space> and <tab>
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characters,
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- in the "POSIX" locale (which is usually the same as the "C" locale),
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the blank characters include only the ASCII <space> and <tab>
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characters. */
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for (c = 0; c <= UCHAR_MAX; c++)
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ASSERT (!isblank (c) == !(c == ' ' || c == '\t'));
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ASSERT (!isblank (EOF));
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return test_exit_status;
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}
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