/* * 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 boost::thread_specific_ptr<CRandomGenerator> CRandomGenerator::defaultRand; CRandomGenerator::CRandomGenerator() { resetSeed(); } CRandomGenerator::CRandomGenerator(int seed) { setSeed(seed); } void CRandomGenerator::setSeed(int seed) { rand.seed(seed); } void 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))); } TRandI CRandomGenerator::getIntRange(int lower, int upper) { return std::bind(TIntDist(lower, upper), std::ref(rand)); } vstd::TRandI64 CRandomGenerator::getInt64Range(int64_t lower, int64_t upper) { return std::bind(TInt64Dist(lower, upper), std::ref(rand)); } int CRandomGenerator::nextInt(int upper) { return getIntRange(0, upper)(); } int CRandomGenerator::nextInt(int lower, int upper) { return getIntRange(lower, upper)(); } int CRandomGenerator::nextInt() { return TIntDist()(rand); } vstd::TRand CRandomGenerator::getDoubleRange(double lower, double upper) { return std::bind(TRealDist(lower, upper), std::ref(rand)); } double CRandomGenerator::nextDouble(double upper) { return getDoubleRange(0, upper)(); } double CRandomGenerator::nextDouble(double lower, double upper) { return getDoubleRange(lower, upper)(); } double CRandomGenerator::nextDouble() { return TRealDist()(rand); } CRandomGenerator & CRandomGenerator::getDefault() { if(!defaultRand.get()) { defaultRand.reset(new CRandomGenerator()); } return *defaultRand; } TGenerator & CRandomGenerator::getStdGenerator() { return rand; } VCMI_LIB_NAMESPACE_END