/*
 * Copyright (C) 2007-2019 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef BU_BASE64_H
#define BU_BASE64_H

#include "bu/filter.h"
#include "bu/exceptionbase.h"

namespace Bu
{
    subExceptionDecl( Base64Exception );
    
    /**
     *
     *@ingroup Streams
     */
    class Base64 : public Bu::Filter
    {
    public:
        Base64( Bu::Stream &rNext, int iChunkSize=0 );
        virtual ~Base64();

        virtual void start();
        virtual Bu::size stop();
        virtual Bu::size read( void *pBuf, Bu::size nBytes );
        virtual Bu::size write( const void *pBuf, Bu::size nBytes );

        virtual bool isOpen();

        virtual bool isEos();

    private:
        int iBPos;
        int iBuf;
        int iRPos;
        int iChars;
        bool bEosIn;
        Bu::size iTotalIn;
        Bu::size iTotalOut;
        static const char tblEnc[65];
        char tblDec[80];
        enum Mode
        {
            Nothing     = 0x00,
            Encode      = 0x01,
            Decode      = 0x02,
        };
        Mode eMode;
        int iChunkSize;
        int iCurChunk;
    };
};

#endif