source: box/trunk/lib/common/MemBlockStream.h @ 217

// --------------------------------------------------------------------------
//
// File
//              Name:    MemBlockStream.h
//              Purpose: Stream out data from any memory block
//              Created: 2003/09/05
//
// --------------------------------------------------------------------------

#ifndef MEMBLOCKSTREAM__H
#define MEMBLOCKSTREAM__H

#include "IOStream.h"

class StreamableMemBlock;
class CollectInBufferStream;

// --------------------------------------------------------------------------
//
// Class
//              Name:    MemBlockStream
//              Purpose: Stream out data from any memory block -- be careful the lifetime
//                               of the block is greater than the lifetime of this stream.
//              Created: 2003/09/05
//
// --------------------------------------------------------------------------
class MemBlockStream : public IOStream
{
public:
        MemBlockStream(const void *pBuffer, int Size);
        MemBlockStream(const StreamableMemBlock &rBlock);
        MemBlockStream(const CollectInBufferStream &rBuffer);
        MemBlockStream(const MemBlockStream &rToCopy);
        ~MemBlockStream();
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 pos_type GetPosition() const;
        virtual void Seek(pos_type Offset, int SeekType);
        virtual bool StreamDataLeft();
        virtual bool StreamClosed();

private:
        const char *mpBuffer;
        int mBytesInBuffer;
        int mReadPosition;
};

#endif // MEMBLOCKSTREAM__H