| 1 | /* Test whether a character is a blank.
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| 2 |
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| 3 | Copyright (C) 2009-2022 Free Software Foundation, Inc.
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| 4 |
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| 5 | This file is free software: you can redistribute it and/or modify
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| 6 | it under the terms of the GNU Lesser General Public License as
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| 7 | published by the Free Software Foundation; either version 2.1 of the
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| 8 | License, or (at your option) any later version.
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| 9 |
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| 10 | This file is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public License
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| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | #include <config.h>
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| 19 |
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| 20 | /* Specification. */
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| 21 | #include <ctype.h>
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| 22 |
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| 23 | int
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| 24 | isblank (int c)
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| 25 | {
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| 26 | /* On all known platforms, in all predefined locales, isblank(c) is likely
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| 27 | equivalent with (c == ' ' || c == '\t'). Look at the glibc definition
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| 28 | (in glibc/localedata/locales/i18n): The "blank" characters are '\t', ' ',
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| 29 | U+1680, U+180E, U+2000..U+2006, U+2008..U+200A, U+205F, U+3000, and none
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| 30 | except the first two is present in a common 8-bit encoding. Therefore
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| 31 | the substitute for other platforms is not more complicated than this. */
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| 32 | return (c == ' ' || c == '\t');
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| 33 | }
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