g4_prng.h

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/* Author(s)     :     Francois Mauger <mauger@lpccaen.in2p3.fr>
 * Creation date : 2011-02-26
 * Last modified : 2013-03-09
 *
 * Copyright (C) 2011-2013 Francois Mauger <mauger@lpccaen.in2p3.fr>
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * Description:
 *
 *   GEANT4 PRNG based on mygsl::rng
 *
 * History:
 *
 */

#ifndef MCTOOLS_G4_G4_PRNG_H
#define MCTOOLS_G4_G4_PRNG_H 1

// Standard library:
#include <iostream>
#include <string>

// Third party:
// - CLHEP:
#include <CLHEP/Random/RandomEngine.h>

namespace mygsl {
  class rng;
}
namespace mctools {

  namespace g4 {

    class g4_prng : public CLHEP::HepRandomEngine
    {
    public:

      static const int SEED_INVALID = -1;
      static const int SEED_TIME    = 0;

      g4_prng ();

      g4_prng (mygsl::rng &);

      virtual ~g4_prng ();

      void set_random (mygsl::rng & rng_);

      virtual double flat ();

      virtual void flatArray (const int size, double* vect);

      virtual void setSeed (long seed, int dummy_ = 0);

      virtual void setSeeds (const long * seeds, int index_ = -1);

      virtual void saveStatus ( const char filename[] = "G4PRNG.conf") const;

      virtual void restoreStatus ( const char filename[] = "G4PRNG.conf" );

      virtual void showStatus () const;

      virtual std::string name () const;

    private:

      int          _random_seed_; 
      mygsl::rng * _random_;      

    };

  }  // end of namespace g4

}  // end of namespace mctools

#endif // MCTOOLS_G4_G4_PRNG_H

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