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