--- /dev/null
+/* Copyright (C) 2015 Trend Micro Inc.
+ * All rights reserved.
+ *
+ * This program is a free software; you can redistribute it
+ * and/or modify it under the terms of the GNU General Public
+ * License (version 2) as published by the FSF - Free Software
+ * Foundation.
+ */
+
+#ifndef _DODIFF_H_
+#define _DODIFF_H_
+
+#include "rules.h"
+#include "eventinfo.h"
+
+int doDiff(RuleInfo *rule, const Eventinfo *lf);
+
+
+#endif /* _DODIFF_H_ */