/*
 * Copyright (C) 2007-2013 Xagasoft, All rights reserved.
 *
 * This file is part of the libgats library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef GATS_INTEGER_H
#define GATS_INTEGER_H

#include "gats-qt/object.h"

#include <stdint.h>

#include <QIODevice>

namespace Gats
{
    class Integer : public Gats::Object
    {
        Q_OBJECT;
    public:
        Integer();
        Integer( int64_t iVal );
        virtual ~Integer();

        virtual Object *clone() const;

        virtual Type getType() const { return typeInteger; }
        int64_t getValue() const { return iVal; }
        int64_t value() const { return iVal; }
        void setValue( int64_t iNewVal ) { iVal = iNewVal; }

        virtual void write( QIODevice &rOut ) const;
        virtual void read( QIODevice &rIn, char cType );

        template<typename itype>
        static void readPackedInt( QIODevice &rStream, itype &rOut )
        {
            int8_t b;
            rOut = 0;
            bool bNeg;

            rStream.read( (char *)&b, 1 );
            bNeg = ( b&0x40 );
            rOut |= (itype(b&0x3F));
            int c = 0;
            while( (b&0x80) )
            {
                rStream.read( (char *)&b, 1 );
                rOut |= (itype(b&0x7F)) << (6+7*(c++));
            }
            if( bNeg ) rOut = -rOut;
        }

        template<typename itype>
        static void writePackedInt( QIODevice &rStream, itype iIn )
        {
            uint8_t b;

            if( iIn < 0 )
            {
                iIn = -iIn;
                b = (iIn&0x3F);
                if( iIn > b )
                    b |= 0x80 | 0x40;
                else
                    b |= 0x40;
            }
            else
            {
                b = (iIn&0x3F);
                if( iIn > b )
                    b |= 0x80;
            }
            rStream.write( (const char *)&b, 1 );
            iIn = iIn >> 6;

            while( iIn )
            {
                b = (iIn&0x7F);
                if( iIn > b )
                    b |= 0x80;
                rStream.write( (const char *)&b, 1 );
                iIn = iIn >> 7;
            }
        }

    private:
        int64_t iVal;
    };
};

//Bu::Formatter &operator<<( Bu::Formatter &f, const Gats::Integer &i );

#endif