69 lines
1.3 KiB
C++
69 lines
1.3 KiB
C++
/*
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* Copyright (c) 2014, Oculus VR, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* RakNet License.txt file in the licenses directory of this source tree. An additional grant
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* of patent rights can be found in the RakNet Patents.txt file in the same directory.
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*
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*
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* Modified work: Copyright (c) 2017, SLikeSoft UG (haftungsbeschränkt)
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*
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* This source code was modified by SLikeSoft. Modifications are licensed under the MIT-style
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* license found in the license.txt file in the root directory of this source tree.
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*/
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///
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/// \file CheckSum.cpp
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/// \brief [Internal] CheckSum implementation from http://www.flounder.com/checksum.htm
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///
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#ifndef __CHECKSUM_H
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#define __CHECKSUM_H
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#include "memoryoverride.h"
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/// Generates and validates checksums
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class CheckSum
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{
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public:
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/// Default constructor
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CheckSum()
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{
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Clear();
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}
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void Clear()
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{
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sum = 0;
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r = 55665;
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c1 = 52845;
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c2 = 22719;
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}
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void Add ( unsigned int w );
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void Add ( unsigned short w );
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void Add ( unsigned char* b, unsigned int length );
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void Add ( unsigned char b );
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unsigned int Get ()
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{
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return sum;
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}
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protected:
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unsigned short r;
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unsigned short c1;
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unsigned short c2;
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unsigned int sum;
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};
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#endif
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