khanat-opennel-code/code/ryzom/client/src/cdb_check_sum.h

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// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef NL_CDB_CHECK_SUM_H
#define NL_CDB_CHECK_SUM_H
#include "nel/misc/types_nl.h"
/**
* class implementing check sum for the client database
* these check sum can be used to ensure that linked properties have all been modified
* \author Nicolas Brigand
* \author Nevrax France
* \date 2002
*/
class CCDBCheckSum
{
public:
///constructor
CCDBCheckSum();
//clear the sum
void clear()
{
_Sum = 0;
};
///add an uint8 to the sum
void add(uint8 el);
///add a value to the check sum
template <class T>
void add(const T & el)
{
T value = el;
for (uint8 i=0; i< sizeof(T); i++)
{
uint8 tmp = (uint8)(value & 0xFF);
add(tmp);
value >>=8;
}
}
///add a vector to the sum
template <class T>
void addVector(const std::vector<T> & vect)
{
for (typename std::vector<T>::const_iterator it = vect.begin(); it != vect.end(); it++)
add(*it);
}
uint32 getSum()
{
return _Sum;
}
private:
///the checsum result
uint32 _Sum;
///the following values are used in the check algorithm
uint32 _Factor;
uint32 _Const1;
uint32 _Const2;
};
#endif // NL_CDB_CHECK_SUM_H
/* End of cdb_check_sum.h */