34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
/* Test whether a character is a blank.
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Copyright (C) 2009-2022 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <ctype.h>
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int
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isblank (int c)
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{
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/* On all known platforms, in all predefined locales, isblank(c) is likely
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equivalent with (c == ' ' || c == '\t'). Look at the glibc definition
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(in glibc/localedata/locales/i18n): The "blank" characters are '\t', ' ',
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U+1680, U+180E, U+2000..U+2006, U+2008..U+200A, U+205F, U+3000, and none
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except the first two is present in a common 8-bit encoding. Therefore
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the substitute for other platforms is not more complicated than this. */
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return (c == ' ' || c == '\t');
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}
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