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56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
/* $Id$ */
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/** @file random_func.cpp Implementation of the pseudo random generator. */
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#include "../stdafx.h"
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#include "random_func.hpp"
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#include "bitmath_func.hpp"
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Randomizer _random, _interactive_random;
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uint32 Randomizer::Next()
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{
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const uint32 s = this->state[0];
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const uint32 t = this->state[1];
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this->state[0] = s + ROR(t ^ 0x1234567F, 7) + 1;
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return this->state[1] = ROR(s, 3) - 1;
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}
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uint32 Randomizer::Next(uint16 max)
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{
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return GB(this->Next(), 0, 16) * max >> 16;
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}
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void Randomizer::SetSeed(uint32 seed)
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{
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this->state[0] = seed;
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this->state[1] = seed;
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}
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void SetRandomSeed(uint32 seed)
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{
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_random.SetSeed(seed);
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_interactive_random.SetSeed(seed * 0x1234567);
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}
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#ifdef RANDOM_DEBUG
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#include "../network/network_data.h"
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#include "../variables.h" /* _frame_counter */
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#include "../player_func.h"
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uint32 DoRandom(int line, const char *file)
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{
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if (_networking && (DEREF_CLIENT(0)->status != STATUS_INACTIVE || !_network_server)) {
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printf("Random [%d/%d] %s:%d\n",_frame_counter, (byte)_current_player, file, line);
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}
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return _random.Next();
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}
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uint DoRandomRange(uint max, int line, const char *file)
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{
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return GB(DoRandom(line, file), 0, 16) * max >> 16;
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}
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#endif /* RANDOM_DEBUG */
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