Network: Add state checksum which is check in network sync
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/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD 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.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file checksum_func.hpp Checksum utility functions. */
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#ifndef CHECKSUM_FUNC_HPP
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#define CHECKSUM_FUNC_HPP
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#include "bitmath_func.hpp"
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struct SimpleChecksum64 {
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uint64 state = 0;
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void Update(uint64 input)
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{
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this->state = ROL(this->state, 1) ^ input ^ 0x123456789ABCDEF7ULL;
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}
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};
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extern SimpleChecksum64 _state_checksum;
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inline void UpdateStateChecksum(uint64 input)
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{
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_state_checksum.Update(input);
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}
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#endif /* CHECKSUM_FUNC_HPP */
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