// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// which accompanies this distribution, and is available

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// This file contains the header file of the Sms socket Buffers.

// 

//

/**

 @file

*/

#if !defined (__SMSUSTRM_H__)

#define __SMSUSTRM_H__

#if !defined(__E32STD_H__)

#include <e32std.h>

#endif

#if !defined(__S32BUF_H__)

#include <s32buf.h>

#endif

#if !defined(__S32STRM_H__)

#include <s32strm.h>

#endif

class RSocket;

/**

 *  @publishedAll

 *  @released

 */

const TInt KSmsMaxSegmentLength=0x100;

/**

 *  An SMS stream buffer to read and write over a socket.

 *  @publishedAll

 *  @released 

 */

class RSmsSocketBuf : public TStreamBuf

	{

public:

	RSmsSocketBuf(RSocket& aSocket);

private:

// from TStreamBuf

	TInt UnderflowL(TInt aMaxLength);

	void OverflowL();

	void DoSynchL();

private:

	void SocketWriteL();

//

	inline TInt Lag(TRead) const;

	inline TInt Lag(TWrite) const;

private:

	RSocket& iSocket;

	TUint8 iBuffer[KSmsMaxSegmentLength];

	};

/**

 *  Stream that reads a CSmsMessage object across a socket.

 *  @publishedAll

 *  @released 

 */

class RSmsSocketReadStream : public RReadStream

	{

public:

	IMPORT_C RSmsSocketReadStream(RSocket& aSocket);

private:

	RSmsSocketBuf iBuf;

	};

/**

 *  Stream that writes a CSmsMessage object across a socket.

 *  @publishedAll

 *  @released 

 */

class RSmsSocketWriteStream : public RWriteStream

	{

public:

	IMPORT_C RSmsSocketWriteStream(RSocket& aSocket);

private:

	RSmsSocketBuf iBuf;

	};

#include "smsustrm.inl"

#endif // !defined __SMSUSTRM_H__