randomnumberdistribution.h

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/*
 * Copyright (c) 2013-2014 - Adjacent Link LLC, Bridgewater, New Jersey
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * * Redistributions in binary form must reproduce the above copyright
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 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef EMANEUTILSRANDOMNUMBERDISTRIBUTION_HEADER_
#define EMANEUTILSRANDOMNUMBERDISTRIBUTION_HEADER_

#include <random>
#include <chrono>

namespace EMANE
{
  namespace Utils
  {
    template<class Generator, class Distribution>
    class RandomNumberDistribution
    {
    public:
      RandomNumberDistribution(typename Distribution::result_type min, 
                               typename Distribution::result_type max, 
                               unsigned seed = std::chrono::system_clock::now().time_since_epoch().count()) :
        generator_{seed},
        distribution_{min, max}
      {}
      
      typename Distribution::result_type operator()()
      {
        return distribution_(generator_);
      }
      
    private:
      Generator generator_;
      Distribution distribution_;
    };
  }
}

#endif // EMANEUTILSRANDOMNUMBERDISTRIBUTION_HEADER_