longint.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: longint.h,v 1.15 2006/12/28 19:01:25 rafi Exp $
//

#ifndef _LONGINT_H
#define _LONGINT_H

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

#include <list>
#include <string>

#include "casexception.h"
#include "casnumeric.h"

class LongInt : public CASNumeric {
    private:
        enum {
            part_len = 3,
            fmt_len = 80
    };

        std::list<unsigned int> lst;

        LongInt *div_remainder;
        unsigned long frontpartlength() const;
        void str2longint ( const char* str_num );
        void num2longint ( const signed long num );
        void longint2str ( char* s, unsigned long size ) const;
        void stripzeros();
        void setzero();

    public:
        LongInt ( signed long l = 0 );
        LongInt ( const char *s );
        LongInt ( const std::string &s );
        LongInt ( const LongInt &r );
        ~LongInt();

        CASObject* Clone() const;
        inline CASType GetType() const {
            return CT_LONGINT;
        }
        void Get ( char *s, unsigned long size ) const;
        void Get ( std::string &s ) const;
        unsigned long Length() const;
        void Print() const;
        CASObject* Invert() const;
        CASObject* Absolute() const;
        bool IsZero() const;
        bool IsOne() const;
        CASObject* Add ( const CASObject* addend ) const;
        CASObject* Subtract ( const CASObject* sub ) const;
        CASObject* Multiply ( const CASObject* fact ) const;
        CASObject* Divide ( const CASObject* divisor ) const;
        CASObject* Power ( const CASObject* exp ) const;
        CASObject* Modulo ( const CASObject* divisor ) const;
        CASObject* GCD ( const CASObject* i ) 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;
        CASObject* Evaluate() const;
        inline CASObject* SortWeight() const {
            return Clone();
        }
        inline void Sort() {
            meta.SetSorted();
        }
        inline bool IsPureNumerical() const { return meta.IsPureNumerical(); }

        void Get ( char **s ) const throw ( EInvArg, EUninitializedPtr );
        LongInt Pow ( const LongInt &exp ) const;
        LongInt Pow ( unsigned long exp ) const;
        LongInt FractionalPart ( const LongInt &r ) const;
        LongInt FractionalPart ( signed long r ) const;

        LongInt& operator= ( const LongInt &r );
        LongInt& operator= ( const signed long &r );
        LongInt& operator+= ( const LongInt &r );
        LongInt& operator+= ( const signed long &r );
        LongInt& operator-= ( const LongInt &r );
        LongInt& operator-= ( const signed long &r );
        LongInt& operator*= ( const LongInt &r );
        LongInt& operator*= ( const signed long &r );
        LongInt& operator/= ( const LongInt &r );
        LongInt& operator/= ( const signed long &r );
        LongInt& operator%= ( const LongInt &r );
        LongInt& operator%= ( const signed long &r );
        const LongInt operator+ ( const LongInt &r ) const;
        const LongInt operator+ ( const long &r ) const;
        const LongInt operator* ( const LongInt &r ) const;
        const LongInt operator* ( const long &r ) const;
        const LongInt operator- ( const LongInt &r ) const;
        const LongInt operator- ( const long &r ) const;
        const LongInt operator/ ( const LongInt &r ) const;
        const LongInt operator/ ( const long &r ) const;
        const LongInt operator% ( const LongInt &r ) const;
        const LongInt operator% ( const long &r ) const;
        const bool operator== ( const LongInt &r ) const;
        const bool operator== ( const long &r ) const;
        const bool operator!= ( const LongInt &r ) const;
        const bool operator!= ( const long &r ) const;
        const bool operator< ( const LongInt &r ) const;
        const bool operator< ( const long &r ) const;
        const bool operator> ( const LongInt &r ) const;
        const bool operator> ( const long &r ) const;
        const bool operator>= ( const LongInt &r ) const;
        const bool operator>= ( const long &r ) const;
        const bool operator<= ( const LongInt &r ) const;
        const bool operator<= ( const long &r ) const;
        const LongInt operator<< ( const signed long &r ) const;
        const LongInt operator++();
        const LongInt operator++ ( int );
        const LongInt operator--();
        const LongInt operator-- ( int );

        friend class CASConvert;
};

#endif /* _LONGINT_H */

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