source: box/trunk/lib/common/PartialReadStream.h @ 1586

// --------------------------------------------------------------------------
//
// File
//              Name:    PartialReadStream.h
//              Purpose: Read part of another stream
//              Created: 2003/08/26
//
// --------------------------------------------------------------------------

#ifndef PARTIALREADSTREAM__H
#define PARTIALREADSTREAM__H

#include "IOStream.h"

// --------------------------------------------------------------------------
//
// Class
//              Name:    PartialReadStream
//              Purpose: Read part of another stream
//              Created: 2003/08/26
//
// --------------------------------------------------------------------------
class PartialReadStream : public IOStream
{
public:
        PartialReadStream(IOStream &rSource, pos_type BytesToRead);
        ~PartialReadStream();
private:
        // no copying allowed
        PartialReadStream(const IOStream &);
        PartialReadStream(const PartialReadStream &);
        
public:
        virtual int Read(void *pBuffer, int NBytes, int Timeout = IOStream::TimeOutInfinite);
        virtual pos_type BytesLeftToRead();
        virtual void Write(const void *pBuffer, int NBytes);
        virtual bool StreamDataLeft();
        virtual bool StreamClosed();

private:
        IOStream &mrSource;
        pos_type mBytesLeft;
};

#endif // PARTIALREADSTREAM__H