ebml/MemIOCallback.h

Go to the documentation of this file.

/****************************************************************************
** libebml : parse EBML files, see http://embl.sourceforge.net/
**
** <file/class description>
**
** Copyright (C) 2003-2004 Jory Stone.  All rights reserved.
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License as published by the Free Software Foundation; either
** version 2.1 of the License, or (at your option) any later version.
** 
** This library 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
** Lesser General Public License for more details.
** 
** You should have received a copy of the GNU Lesser General Public
** License along with this library; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**
** See http://www.matroska.org/license/lgpl/ for LGPL licensing information.
**
** Contact license@matroska.org if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#ifndef LIBEBML_MEMIOCALLBACK_H
#define LIBEBML_MEMIOCALLBACK_H

#include "IOCallback.h"
#include <string>
#ifndef __BEOS__
#include <sstream>
#else
#include <strstream>
#define stringstream strstream
#endif

START_LIBEBML_NAMESPACE

class EBML_DLL_API MemIOCallback : public IOCallback
{
public:
        MemIOCallback(uint64 DefaultSize = 128);
        ~MemIOCallback();

        uint32 read(void *Buffer, size_t Size);

        void setFilePointer(int64 Offset, seek_mode Mode=seek_beginning);

        size_t write(const void *Buffer, size_t Size);

        virtual uint64 getFilePointer() {return dataBufferPos;};

        void close() {};

        binary *GetDataBuffer() const {return dataBuffer;};
        uint64 GetDataBufferSize() {return dataBufferTotalSize;};
        void SetDataBufferSize(uint64 newDataBufferSize) {dataBufferTotalSize = newDataBufferSize;};
        uint32 write(IOCallback & IOToRead, size_t Size);

        bool IsOk() { return mOk; };    
        const std::string &GetLastErrorStr() { return mLastErrorStr; };
protected:
        bool mOk;
        std::string mLastErrorStr;

        binary *dataBuffer;
        uint64 dataBufferPos;
        uint64 dataBufferTotalSize;
        uint64 dataBufferMemorySize;
};

END_LIBEBML_NAMESPACE

#endif // LIBEBML_MEMIOCALLBACK_H

---