rand.h

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/**********************************************************************
rand.h - Pseudo random number generator.

Copyright (C) 1998-2001 by OpenEye Scientific Software, Inc.
Some portions Copyright (C) 2001-2006 by Geoffrey R. Hutchison

This file is part of the Open Babel project.
For more information, see <http://openbabel.org/>

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 version 2 of the License.

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.
***********************************************************************/

#ifndef RAND_H
#define RAND_H

#include <openbabel/babelconfig.h>

namespace OpenBabel
{

  //******************************************
  //*** Stuff for random number generation ***
  //******************************************

  typedef struct
  {
    unsigned int hi;
    unsigned int lo;
  }
  DoubleType;

  

  class OBRandom
  {
    DoubleType d;
    unsigned int m,a,c;
    unsigned int p;
    unsigned int i;
    unsigned int x;
    bool OBRandomUseSysRand;

  public:
    OBRandom(bool useSys= false);
    void Seed(int seed)
    {
      x = seed;
    }
    void TimeSeed();
    int NextInt();
    double NextFloat();
  };

} // end namespace OpenBabel

#endif // RAND_H