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+/**
+ * @file llcommonutils.h
+ * @brief Common utils
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library 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;
+ * version 2.1 of the License only.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLCOMMONUTILS_H
+#define LL_LLCOMMONUTILS_H
+
+namespace LLCommonUtils
+{
+ /**
+ * Computes difference between 'vnew' and 'vcur' vectors.
+ * Items present in 'vnew' and missing in 'vcur' are treated as added and are copied into 'vadded'
+ * Items missing in 'vnew' and present in 'vcur' are treated as removed and are copied into 'vremoved'
+ *
+ * @param vnew[in] - incoming IDs
+ * @param vcur[in] - current IDs
+ * @param vadded[out] - difference between incoming and current IDS - added IDs
+ * @param vremoved[out] - difference between incoming and current IDS - removed IDs
+ */
+ LL_COMMON_API void computeDifference(
+ const uuid_vec_t& vnew,
+ const uuid_vec_t& vcur,
+ uuid_vec_t& vadded,
+ uuid_vec_t& vremoved);
+};
+
+#endif //LL_LLCOMMONUTILS_H
+
+// EOF