// distribution boxbackup-0.11rc2 (svn version: 2072)
//  
// Copyright (c) 2003 - 2008
//      Ben Summers and contributors.  All rights reserved.
//  
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. All use of this software and associated advertising materials must 
//    display the following acknowledgment:
//        This product includes software developed by Ben Summers.
// 4. The names of the Authors may not be used to endorse or promote
//    products derived from this software without specific prior written
//    permission.
// 
// [Where legally impermissible the Authors do not disclaim liability for 
// direct physical injury or death caused solely by defects in the software 
// unless it is modified by a third party.]
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT,
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//  
//  
//  
// --------------------------------------------------------------------------
//
// 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