source: box/trunk/lib/common/BufferedStream.h @ 2728

// --------------------------------------------------------------------------
//
// File
//              Name:    BufferedStream.h
//              Purpose: Buffering read-only wrapper around IOStreams
//              Created: 2007/01/16
//
// --------------------------------------------------------------------------

#ifndef BUFFEREDSTREAM__H
#define BUFFEREDSTREAM__H

#include "IOStream.h"

class BufferedStream : public IOStream
{
private:
        IOStream& mrSource;
        char mBuffer[4096];
        int  mBufferSize;
        int  mBufferPosition;

public:
        BufferedStream(IOStream& rSource);
        
        virtual int Read(void *pBuffer, int NBytes, int Timeout = IOStream::TimeOutInfinite);
        virtual pos_type BytesLeftToRead();
        virtual void Write(const void *pBuffer, int NBytes);
        virtual pos_type GetPosition() const;
        virtual void Seek(IOStream::pos_type Offset, int SeekType);
        virtual void Close();
        
        virtual bool StreamDataLeft();
        virtual bool StreamClosed();

private:
        BufferedStream(const BufferedStream &rToCopy) 
        : mrSource(rToCopy.mrSource) { /* do not call */ }
};

#endif // BUFFEREDSTREAM__H