fraction.h

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// -*- C++ -*-
//
//  Copyright (c) 2006 by Rafael Ostertag
//
//  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.
//
//
// $Id: fraction.h,v 1.14 2006/12/28 19:01:25 rafi Exp $
//

#ifndef _FRACTION_H
#define _FRACTION_H

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "casexception.h"
#include "cassymbolic.h"

class Fraction : public CASSymbolic {
    private:
        CASObject* numerator;
        CASObject* denominator;

    protected:
    // Empty

    public:
        Fraction();
        Fraction ( const CASObject* num, const CASObject* denom );
        Fraction ( const CASObject* denom );
        Fraction ( const Fraction &f );
        ~Fraction();

        CASObject* Clone() const;
        inline CASType GetType() const { return CT_FRACTION; }

        void Get ( std::string &s ) const;
        void Get ( char *s, unsigned long size ) const;
        void Print() const;
        unsigned long Length() const;
        bool IsZero() const;
        bool IsOne() const;
        CASObject* Absolute() const;
        void AbsoluteIP();
        CASObject* Invert() const;
        void InvertIP();
        CASObject* Add ( const CASObject* addend ) const;
        CASObject* Subtract ( const CASObject* subtrahend ) const;
        CASObject* Multiply ( const CASObject* factor ) const;
        CASObject* Divide ( const CASObject* divisor ) const;
        CASObject* Power ( const CASObject* exp ) const;
        CASObject* Modulo ( const CASObject* divisor ) const;
        CASObject* GCD ( const CASObject* o ) const;
        bool IsEqual ( const CASObject* o ) const;
        bool IsLT ( const CASObject* o ) const;
        bool IsGT ( const CASObject* o ) const;
        bool IsSimilar ( const CASObject* o ) const;
        bool IsPureNumerical() const;
        CASObject* Evaluate() const;
        CASObject* SortWeight() const;
        void Sort();

        const Fraction& operator= ( const Fraction &f );
        const bool operator== ( const Fraction &f ) const;

        friend class CASConvert;

};

#endif /* _FRACTION_H */

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