// -*- coding: utf-8 -*-
// Copyright (C) 2013 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// Copyright (C) 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
//
// This file is part of Spot, a model checking library.
//
// Spot 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.
//
// Spot 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 SPOT_MISC_RANDOM_HH
# define SPOT_MISC_RANDOM_HH

# include "common.hh"
# include <random>

namespace spot
{
  /// \addtogroup random Random functions
  /// \ingroup misc_tools
  /// @{

  /// \brief Reset the seed of the pseudo-random number generator.
  ///
  /// \see drand, mrand, rrand
  SPOT_API void srand(unsigned int seed);

  /// \brief Compute a pseudo-random integer value between \a min and
  /// \a max included.
  ///
  /// \see drand, mrand, srand
  SPOT_API int rrand(int min, int max);

  /// \brief Compute a pseudo-random integer value between 0 and
  /// \a max-1 included.
  ///
  /// \see drand, rrand, srand
  SPOT_API int mrand(int max);

  /// \brief Compute a pseudo-random double value
  /// between 0.0 and 1.0 (1.0 excluded).
  ///
  /// \see mrand, rrand, srand
  SPOT_API double drand();

  /// \brief Compute pseudo-random integer value between 0
  /// and \a n included, following a binomial distribution
  /// for probability \a p.
  class SPOT_API barand : protected std::binomial_distribution<>
  {
  public:
    barand(int n, double p) : binomial_distribution(n, p)
    {
    }

    int rand();
  };
}

#endif // SPOT_MISC_RANDOM_HH
