IXferBytes.h

//========================================================================================
// 
// $File$
// 
// Owner: Robin Briggs
// 
// $Author$
// 
// $DateTime$
// 
// $Revision$
// 
// $Change$
// 
// Copyright 1997-2010 Adobe Systems Incorporated. All rights reserved.
// 
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance 
// with the terms of the Adobe license agreement accompanying it. If you have received
// this file from a source other than Adobe, then your use, modification, or 
// distribution of it requires the prior written permission of Adobe.
// 
// 
// Purpose:
// This is the underlying data model for streaming. Handles the connection
// between the stream and the backend buffer storage system (file, database 
// record, memory, etc.). 
// 
// THIS IS NOT A STANDARD BOSS INTERFACE
// 
//========================================================================================

#ifndef __IXFERBYTES__
#define __IXFERBYTES__

#include "IPMStream.h"

class IXferBytes
{

public:
 virtual ~IXferBytes()
 {}
 
 virtual uint32 Read(void *buffer, uint32 num) = 0;
 
 virtual uint32 Write(void *buffer, uint32 num) = 0;
 
 virtual uint64 Seek(int64 numberOfBytes, SeekFromWhere fromHere) = 0;

 virtual void Flush() = 0;
 
 virtual StreamState GetStreamState() = 0;
 
 virtual void SetEndOfStream() = 0;
};

#endif // __IXFERBYTES__