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/*Copyright (C) 2015 Olivier Delaneau, Halit Ongen, Emmanouil T. Dermitzakis
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.*/
#ifndef _RANDOM_NUMBER_H
#define _RANDOM_NUMBER_H
#include <cfloat>
#include <cstdint>
#include <random>
class random_number_generator {
protected:
unsigned int seed;
std::mt19937 randomEngine;
std::uniform_int_distribution < unsigned int > uniformDistributionInt;
std::uniform_real_distribution < double > uniformDistributionDouble;
public:
random_number_generator(unsigned int seed = 15052011) : randomEngine(seed), uniformDistributionInt(0, 32768), uniformDistributionDouble(0, 1.0) {
}
~random_number_generator(){
}
void setSeed(unsigned int _seed) {
seed = _seed;
randomEngine.seed(seed);
}
unsigned int getSeed() {
return seed;
}
std::mt19937 & getEngine() {
return randomEngine;
}
unsigned int getInt(unsigned int imin, unsigned int imax) {
return uniformDistributionInt(randomEngine, std::uniform_int_distribution < unsigned int > {imin, imax}.param());
}
unsigned int getInt(unsigned int isize) {
return getInt(0, isize - 1);
}
double getDouble(double fmin, double fmax) {
return uniformDistributionDouble(randomEngine, std::uniform_real_distribution < double > {fmin, fmax}.param());
}
double getDouble() {
return getDouble(0.0, 1.0);
}
};
#endif
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