cbdd9f84d8
# Conflicts: # src/console_gui.cpp # src/lang/korean.txt # src/video/sdl2_v.cpp # src/video/sdl2_v.h # src/window.cpp # src/window_gui.h
32 lines
1.0 KiB
C++
32 lines
1.0 KiB
C++
/*
|
|
* This file is part of OpenTTD.
|
|
* 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.
|
|
* 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.
|
|
* 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/>.
|
|
*/
|
|
|
|
/** @file checksum_func.hpp Checksum utility functions. */
|
|
|
|
#ifndef CHECKSUM_FUNC_HPP
|
|
#define CHECKSUM_FUNC_HPP
|
|
|
|
#include "bitmath_func.hpp"
|
|
|
|
struct SimpleChecksum64 {
|
|
uint64 state = 0;
|
|
|
|
void Update(uint64 input)
|
|
{
|
|
this->state = ROL(this->state, 1) ^ input ^ 0x123456789ABCDEF7ULL;
|
|
}
|
|
};
|
|
|
|
extern SimpleChecksum64 _state_checksum;
|
|
|
|
inline void UpdateStateChecksum(uint64 input)
|
|
{
|
|
_state_checksum.Update(input);
|
|
}
|
|
|
|
#endif /* CHECKSUM_FUNC_HPP */
|