evoreal.h

//---------------------------------------------------------------------
//  Algorithmic Conjurings @ http://www.coyotegulch.com
//  Evocosm -- An Object-Oriented Framework for Evolutionary Algorithms
//
//  evoreal.h
//---------------------------------------------------------------------
//
//  Copyright 1996, 1999, 2002, 2003, 2004, 2005, 2007 Scott Robert Ladd
//
//  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.
//
//-----------------------------------------------------------------------
//
//  For more information on this software package, please visit
//  Scott's web site, Coyote Gulch Productions, at:
//
//      http://www.coyotegulch.com
//  
//-----------------------------------------------------------------------

#if !defined(LIBEVOCOSM_GAFLOAT_H)
#define LIBEVOCOSM_GAFLOAT_H

// libevocosm
#include "evocommon.h"

namespace libevocosm
{

    class evoreal : protected globals 
    {
    public:

        evoreal(float a_sign_weight = 5.0F, float a_exponent_weight =  5.0F, float a_mantissa_weight = 90.0F);


        evoreal(evoreal & a_source);


        evoreal & operator = (evoreal & a_source);


        float  mutate(float  a_f);


        double mutate(double a_d);


        float crossover(float  a_f1, float  a_f2);


        double crossover(double a_d1, double a_d2);

    private:
        // weights used to select parts of a number for manipulation
        const float m_total_weight;
        const float m_sign_weight;
        const float m_exp_weight;

#if defined(_MSC_VER) && (_MSC_VER < 1300)
        static const long FLT_EXP_BITS;
        static const long DBL_EXP_BITS;
#else
        static const long FLT_EXP_BITS = 0x7F800000L;
        static const long DBL_EXP_BITS = 0x7FF00000UL;
#endif
    };
}

#endif