mirror of
https://github.com/vcmi/vcmi.git
synced 2024-12-22 22:13:35 +02:00
109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
/*
|
|
* CRandomGenerator.cpp, part of VCMI engine
|
|
*
|
|
* Authors: listed in file AUTHORS in main folder
|
|
*
|
|
* License: GNU General Public License v2.0 or later
|
|
* Full text of license available in license.txt file, in main folder
|
|
*
|
|
*/
|
|
|
|
#include "StdInc.h"
|
|
#include "CRandomGenerator.h"
|
|
|
|
VCMI_LIB_NAMESPACE_BEGIN
|
|
|
|
CRandomGenerator::CRandomGenerator()
|
|
{
|
|
logRng->trace("CRandomGenerator constructed");
|
|
resetSeed();
|
|
}
|
|
|
|
CRandomGenerator::CRandomGenerator(int seed)
|
|
{
|
|
logRng->trace("CRandomGenerator constructed (%d)", seed);
|
|
setSeed(seed);
|
|
}
|
|
|
|
void CRandomGenerator::setSeed(int seed)
|
|
{
|
|
logRng->trace("CRandomGenerator::setSeed (%d)", seed);
|
|
rand.seed(seed);
|
|
}
|
|
|
|
void CRandomGenerator::resetSeed()
|
|
{
|
|
logRng->trace("CRandomGenerator::resetSeed");
|
|
boost::hash<std::string> stringHash;
|
|
auto threadIdHash = stringHash(boost::lexical_cast<std::string>(boost::this_thread::get_id()));
|
|
setSeed(static_cast<int>(threadIdHash * std::time(nullptr)));
|
|
}
|
|
|
|
int CRandomGenerator::nextInt(int upper)
|
|
{
|
|
logRng->trace("CRandomGenerator::nextInt (%d)", upper);
|
|
return nextInt(0, upper);
|
|
}
|
|
|
|
int64_t CRandomGenerator::nextInt64(int64_t upper)
|
|
{
|
|
logRng->trace("CRandomGenerator::nextInt64 (%d)", upper);
|
|
return nextInt64(0, upper);
|
|
}
|
|
|
|
int CRandomGenerator::nextInt(int lower, int upper)
|
|
{
|
|
logRng->trace("CRandomGenerator::nextInt64 (%d, %d)", lower, upper);
|
|
|
|
if (lower > upper)
|
|
throw std::runtime_error("Invalid range provided: " + std::to_string(lower) + " ... " + std::to_string(upper));
|
|
|
|
return TIntDist(lower, upper)(rand);
|
|
}
|
|
|
|
int CRandomGenerator::nextInt()
|
|
{
|
|
logRng->trace("CRandomGenerator::nextInt64");
|
|
return TIntDist()(rand);
|
|
}
|
|
|
|
int CRandomGenerator::nextBinomialInt(int coinsCount, double coinChance)
|
|
{
|
|
logRng->trace("CRandomGenerator::nextBinomialInt (%d, %f)", coinsCount, coinChance);
|
|
std::binomial_distribution<> distribution(coinsCount, coinChance);
|
|
return distribution(rand);
|
|
}
|
|
|
|
int64_t CRandomGenerator::nextInt64(int64_t lower, int64_t upper)
|
|
{
|
|
logRng->trace("CRandomGenerator::nextInt64 (%d, %d)", lower, upper);
|
|
if (lower > upper)
|
|
throw std::runtime_error("Invalid range provided: " + std::to_string(lower) + " ... " + std::to_string(upper));
|
|
|
|
return TInt64Dist(lower, upper)(rand);
|
|
}
|
|
|
|
double CRandomGenerator::nextDouble(double upper)
|
|
{
|
|
logRng->trace("CRandomGenerator::nextDouble (%f)", upper);
|
|
return nextDouble(0, upper);
|
|
}
|
|
|
|
double CRandomGenerator::nextDouble(double lower, double upper)
|
|
{
|
|
logRng->trace("CRandomGenerator::nextDouble (%f, %f)", lower, upper);
|
|
if(lower > upper)
|
|
throw std::runtime_error("Invalid range provided: " + std::to_string(lower) + " ... " + std::to_string(upper));
|
|
|
|
return TRealDist(lower, upper)(rand);
|
|
}
|
|
|
|
CRandomGenerator & CRandomGenerator::getDefault()
|
|
{
|
|
static thread_local CRandomGenerator defaultRand;
|
|
return defaultRand;
|
|
}
|
|
|
|
|
|
VCMI_LIB_NAMESPACE_END
|