#ifndef __S32BUF_H__

#define __S32BUF_H__/*

* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#include <e32base.h>

#include <fstream>

/**

 * @file

 * @internalComponent

 */

enum TStreamLocation 

	/** The seek position is calculated relative to the beginning of the 

	stream.*/

	{EStreamBeginning,

	/** The seek position is calculated relative to the end of the stream.*/

	EStreamMark,

	/** The seek position is calculated relative to the existing read or 

	write mark in the stream. */

	EStreamEnd};

typedef std::streampos TStreamPos;

class MStreamBuf

	{

public:

	// Symbian definition does not have a virtual destructor and relies on DoRelease virtual...

	// We define one to avoid compiler warnings

	virtual ~MStreamBuf() {}

	enum TRead {ERead=0x01};

	enum TWrite {EWrite=0x02};

	typedef TInt TMark;

	TInt ReadL(TAny *aPtr,TInt aMaxLength);

	void WriteL(const TUint8* aPtr,TInt aLength);

	void SeekL(TMark aMark,TStreamPos aPos);

	TStreamPos SeekL(TMark aMark,TStreamLocation aLocation,TInt anOffset=0);

	TStreamPos SeekL(TRead,TStreamLocation aLocation,TInt anOffset=0);

	TStreamPos SeekL(TWrite,TStreamLocation aLocation,TInt anOffset=0);

	TStreamPos SeekL(TRead,TInt anOffset);

	TStreamPos SeekL(TWrite,TInt anOffset);

	TStreamPos TellL(TRead) const;

	TStreamPos TellL(TWrite) const;

	void Close();

	void Release();

	void SynchL();

private:

	virtual TInt DoReadL(TAny *aPtr,TInt aMaxLength) = 0;

	virtual void DoWriteL(const TUint8* aPtr,TInt aLength) = 0;

	virtual IMPORT_C TStreamPos DoSeekL(TMark aMark,TStreamLocation aLocation,TInt anOffset);

	virtual void DoRelease();

	};

#endif