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43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
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// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "stdpch.h"
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#include "cdb_check_sum.h"
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/*
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* Constructor
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*/
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CCDBCheckSum::CCDBCheckSum()
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{
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//arbitrary values
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_Sum = 0;
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_Factor = 55665;
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_Const1 = 52845;
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_Const2 = 22719;
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};
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///add an uint8 to the sum
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void CCDBCheckSum::add(uint8 el)
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{
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uint32 cipher = (el ^ (_Factor >> 8));
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_Factor = (cipher + _Factor) * _Const1 + _Const2;
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_Sum += cipher;
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}
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