rational.h

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/***************************************************************************
 *   Copyright (C) 2005 by Pierre-Henri WUILLEMIN and Christophe GONZALES  *
 *   {prenom.nom}_at_lip6.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 2 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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef GUM_RATIONAL_H
#define GUM_RATIONAL_H

#include <iomanip>
#include <iostream>
#include <sstream>
#include <stdlib.h>
#include <vector>
#include <agrum/core/math/math.h>

// 64 bits for windows (long is 32 bits)
#ifdef _MSC_VER
typedef __int64          int64_t;
typedef unsigned __int64 uint64_t;
#else
#  include <stdint.h>
#endif

namespace gum {

  template < typename GUM_SCALAR >
  class Rational {
    public:
    // ========================================================================
    // ========================================================================

    static void farey(int64_t&          numerator,
                      int64_t&          denominator,
                      const GUM_SCALAR& number,
                      const int64_t&    den_max = 1000000L,
                      const GUM_SCALAR& zero = 1e-6);

    static void continuedFracFirst(int64_t&          numerator,
                                   int64_t&          denominator,
                                   const GUM_SCALAR& number,
                                   const double&     zero = 1e-6);

    static void continuedFracBest(int64_t&          numerator,
                                  int64_t&          denominator,
                                  const GUM_SCALAR& number,
                                  const int64_t&    den_max = 1000000);

  };

}   // namespace gum


#ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
#  ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
extern template class gum::Rational< double >;
#  endif
#endif
#ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
#  ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
extern template class gum::Rational< long double >;
#  endif
#endif


// Always include template implementation in header file
#include <agrum/core/math/rational_tpl.h>

#endif   // GUM_RATIONAL_H