18dffb485Schristos /* Test whether a character is a blank.
28dffb485Schristos
3*4b169a6bSchristos Copyright (C) 2009-2022 Free Software Foundation, Inc.
48dffb485Schristos
5*4b169a6bSchristos This file is free software: you can redistribute it and/or modify
6*4b169a6bSchristos it under the terms of the GNU Lesser General Public License as
7*4b169a6bSchristos published by the Free Software Foundation; either version 2.1 of the
8*4b169a6bSchristos License, or (at your option) any later version.
98dffb485Schristos
10*4b169a6bSchristos This file is distributed in the hope that it will be useful,
118dffb485Schristos but WITHOUT ANY WARRANTY; without even the implied warranty of
128dffb485Schristos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13*4b169a6bSchristos GNU Lesser General Public License for more details.
148dffb485Schristos
15*4b169a6bSchristos You should have received a copy of the GNU Lesser General Public License
168dffb485Schristos along with this program. If not, see <https://www.gnu.org/licenses/>. */
178dffb485Schristos
188dffb485Schristos #include <config.h>
198dffb485Schristos
208dffb485Schristos /* Specification. */
218dffb485Schristos #include <ctype.h>
228dffb485Schristos
238dffb485Schristos int
isblank(int c)248dffb485Schristos isblank (int c)
258dffb485Schristos {
268dffb485Schristos /* On all known platforms, in all predefined locales, isblank(c) is likely
278dffb485Schristos equivalent with (c == ' ' || c == '\t'). Look at the glibc definition
288dffb485Schristos (in glibc/localedata/locales/i18n): The "blank" characters are '\t', ' ',
298dffb485Schristos U+1680, U+180E, U+2000..U+2006, U+2008..U+200A, U+205F, U+3000, and none
308dffb485Schristos except the first two is present in a common 8-bit encoding. Therefore
318dffb485Schristos the substitute for other platforms is not more complicated than this. */
328dffb485Schristos return (c == ' ' || c == '\t');
338dffb485Schristos }
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