55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/****************************************************************************
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* *
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* Project64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2017 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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/*
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* Implements the CRandom class.
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*
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* This class implements the Lehmer Random Number Generator.
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*
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*/
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#include "stdafx.h"
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#include "Random.h"
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#include <time.h>
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CRandom::CRandom()
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{
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m_state = (uint32_t)time(NULL);
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}
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CRandom::CRandom(uint32_t state_value)
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{
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m_state = state_value;
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}
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uint32_t CRandom::randomizer(uint32_t val)
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{
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return ((uint64_t)val * 279470273UL) % 4294967291UL;
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}
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uint32_t CRandom::next()
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{
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m_state = randomizer(m_state);
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return m_state;
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}
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void CRandom::set_state(uint32_t state_value)
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{
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if (state_value == 0)
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m_state = 1;
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else
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m_state = state_value;
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}
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uint32_t CRandom::get_state()
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{
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return m_state;
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}
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