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/* Test whether a character is a blank.
Copyright (C) 2009-2021 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <ctype.h>
int
isblank (int c)
{
/* On all known platforms, in all predefined locales, isblank(c) is likely
equivalent with (c == ' ' || c == '\t'). Look at the glibc definition
(in glibc/localedata/locales/i18n): The "blank" characters are '\t', ' ',
U+1680, U+180E, U+2000..U+2006, U+2008..U+200A, U+205F, U+3000, and none
except the first two is present in a common 8-bit encoding. Therefore
the substitute for other platforms is not more complicated than this. */
return (c == ' ' || c == '\t');
}
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