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+/* Determine whether a locale is hard.
+
+ Copyright (C) 1999, 2003-2004, 2009-2020 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#ifndef HARD_LOCALE_H_
+# define HARD_LOCALE_H_ 1
+
+# include <stdbool.h>
+
+/* Return true if the specified CATEGORY of the current locale is hard, i.e.
+ different from the C or POSIX locale that has a fixed behavior.
+ CATEGORY must be one of the LC_* values, but not LC_ALL. */
+extern bool hard_locale (int category);
+
+#endif /* HARD_LOCALE_H_ */