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diff --git a/src/shared/utf8.h b/src/shared/utf8.h
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+/***
+ This file is part of eudev, forked from systemd
+
+ Copyright 2012 Lennart Poettering
+
+ systemd 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.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+
+#include "macro.h"
+
+char *ascii_is_valid(const char *s) _pure_;
+
+bool utf8_is_printable(const char* str, size_t length) _pure_;
+
+char *utf16_to_utf8(const void *s, size_t length);
+
+int utf8_encoded_valid_unichar(const char *str);
+int utf8_encoded_to_unichar(const char *str);