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Diffstat (limited to 'indra/llcommon/llcommonutils.cpp')
| -rw-r--r-- | indra/llcommon/llcommonutils.cpp | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/indra/llcommon/llcommonutils.cpp b/indra/llcommon/llcommonutils.cpp new file mode 100644 index 0000000000..0022dc6915 --- /dev/null +++ b/indra/llcommon/llcommonutils.cpp @@ -0,0 +1,61 @@ +/** + * @file llcommonutils.h + * @brief Commin utils + * + * $LicenseInfo:firstyear=2010&license=viewergpl$ + * + * Copyright (c) 2010, Linden Research, Inc. + * + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 + * + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception + * + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. + * + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. + * $/LicenseInfo$ + */ + +#include "linden_common.h" +#include "llcommonutils.h" + +void LLCommonUtils::computeDifference( + const uuid_vec_t& vnew, + const uuid_vec_t& vcur, + uuid_vec_t& vadded, + uuid_vec_t& vremoved) +{ + uuid_vec_t vnew_copy(vnew); + uuid_vec_t vcur_copy(vcur); + + std::sort(vnew_copy.begin(), vnew_copy.end()); + std::sort(vcur_copy.begin(), vcur_copy.end()); + + size_t maxsize = llmax(vnew_copy.size(), vcur_copy.size()); + vadded.resize(maxsize); + vremoved.resize(maxsize); + + uuid_vec_t::iterator it; + // what was removed + it = set_difference(vcur_copy.begin(), vcur_copy.end(), vnew_copy.begin(), vnew_copy.end(), vremoved.begin()); + vremoved.erase(it, vremoved.end()); + + // what was added + it = set_difference(vnew_copy.begin(), vnew_copy.end(), vcur_copy.begin(), vcur_copy.end(), vadded.begin()); + vadded.erase(it, vadded.end()); +} + +// EOF |