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diff --git a/server/util/btreemap.h b/server/util/btreemap.h
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+/*
+ SSSD
+
+ Service monitor
+
+ Copyright (C) Stephen Gallagher 2008
+
+ 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 <http://www.gnu.org/licenses/>.
+*/
+#ifndef BTREEMAP_H_
+#define BTREEMAP_H_
+
+typedef int (*btreemap_comparison_fn)(void *first, void *second);
+struct btreemap;
+int btreemap_search_key(struct btreemap *map, void *key, struct btreemap **node);
+void *btreemap_get_value(struct btreemap *map, void *key);
+int btreemap_set_value(struct btreemap **map, void *key, void *value,
+ btreemap_comparison_fn comparator);
+
+
+#endif /*BTREEMAP_H_*/