random_algorithm.h

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#pragma once
 
#include "randombit_generator.h"
#include <functional>
 
namespace hgps {
class Random {
  public:
    Random() = delete;
    Random(RandomBitGenerator &generator);
 
    int next_int();
 
    int next_int(const int &max_value);
 
    int next_int(const int &min_value, const int &max_value);
 
    double next_double() noexcept;
 
    double next_normal();
 
    double next_normal(const double &mean, const double &standard_deviation);
 
    int next_empirical_discrete(const std::vector<int> &values, const std::vector<float> &cdf);
 
    int next_empirical_discrete(const std::vector<int> &values, const std::vector<double> &cdf);
 
  private:
    std::reference_wrapper<RandomBitGenerator> engine_;
    int next_int_internal(const int &min_value, const int &max_value);
    double next_uniform_internal(const double &min_value, const double &max_value);
    double next_normal_internal(const double &mean, const double &standard_deviation);
};
} // namespace hgps