// distribution boxbackup-0.11rc2 (svn version: 2072)
//  
// Copyright (c) 2003 - 2008
//      Ben Summers and contributors.  All rights reserved.
//  
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// modification, are permitted provided that the following conditions
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// 1. Redistributions of source code must retain the above copyright
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// 2. Redistributions in binary form must reproduce the above copyright
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// 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.
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// [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.]
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//  
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//  
// --------------------------------------------------------------------------
//
// File
//		Name:    ZeroStream.h
//		Purpose: An IOStream which returns all zeroes up to a certain size
//		Created: 2007/04/28
//
// --------------------------------------------------------------------------

#ifndef ZEROSTREAM__H
#define ZEROSTREAM__H

#include "IOStream.h"

class ZeroStream : public IOStream
{
private:
	IOStream::pos_type mSize, mPosition;

public:
	ZeroStream(IOStream::pos_type mSize);
	
	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:
	ZeroStream(const ZeroStream &rToCopy);
};

#endif // ZEROSTREAM__H