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81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
#include "randomgen.h"
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#include <cassert>
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#include "util.h"
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#include "leak_dumper.h"
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namespace Shared { namespace Util {
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// =====================================================
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// class RandomGen
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// =====================================================
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const int RandomGen::m= 714025;
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const int RandomGen::a= 1366;
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const int RandomGen::b= 150889;
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RandomGen::RandomGen(){
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#ifdef USE_STREFLOP
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lastNumber = streflop::RandomInit(0); // streflop
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#else
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lastNumber= 0;
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#endif
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//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,lastNumber);
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}
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void RandomGen::init(int seed){
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#ifdef USE_STREFLOP
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lastNumber = streflop::RandomInit(seed); // streflop
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#else
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lastNumber= seed % m;
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#endif
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//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] seed = %d, lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,seed,lastNumber);
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}
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int RandomGen::rand() {
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//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,lastNumber);
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lastNumber= ((a*lastNumber) + b) % m;
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//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] lastNumber = %d\n",__FILE__,__FUNCTION__,__LINE__,lastNumber);
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return lastNumber;
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}
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int RandomGen::randRange(int min, int max){
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assert(min<=max);
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#ifdef USE_STREFLOP
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int res = streflop::Random<true, false, float>(min, max); // streflop
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#else
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int diff= max-min;
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int res= min + static_cast<int>((static_cast<float>(diff+1)*RandomGen::rand()) / m);
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#endif
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assert(res>=min && res<=max);
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//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] min = %d, max = %d, res = %d\n",__FILE__,__FUNCTION__,__LINE__,min,max,res);
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return res;
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}
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float RandomGen::randRange(float min, float max){
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assert(min<=max);
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#ifdef USE_STREFLOP
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float res = streflop::Random<true, false, float>(min, max, randomState); // streflop
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#else
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float rand01= static_cast<float>(RandomGen::rand())/(m-1);
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float res= min+((max-min)*rand01);
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#endif
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assert(res>=min && res<=max);
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//SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d] min = %f, max = %f, res = %f\n",__FILE__,__FUNCTION__,__LINE__,min,max,res);
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return res;
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}
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}}//end namespace
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