// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

//

#if !defined(__MBufChain_inl__)

#define __MBufChain_inl__

//

// MBUF CHAIN

//

/**

Constructor

*/

inline RMBufChain::RMBufChain()

	{}

/**

Constructor

*/

inline RMBufChain::RMBufChain(RCommsBuf* aChain) : RCommsBufChain(aChain)

	{}

/**

Rerurns the first in the chain

@return the first in the chain

*/

inline RMBuf* RMBufChain::First()

{ return static_cast<RMBuf*>(iNext); }

/**

Returns the first in the chain

@return the first in the chain

*/

inline const RMBuf* RMBufChain::First() const

{ return static_cast<const RMBuf*>(iNext); }

/**

operator =

*/

inline RMBufChain& RMBufChain::operator =(RMBuf* aChain)

	{ iNext = aChain; return *this; }

/**

Initializes the members (iNext = NULL)

*/

inline void RMBufChain::Init()

	{ iNext = NULL; }

inline TBool RMBufChain::IsEmpty() const

/**

Check if empty, if empty returns true

*/

	{

	return RCommsBufChain::IsEmpty();

	}

#ifndef __KERNEL_MODE__

/**

Links a chain to the chain in the chain

@param aChain The chain to be linked

*/

inline void RMBufChain::Link(RMBufChain &aChain)

	{ if (!IsEmpty()) (static_cast<RMBuf*>(iNext))->LinkPkt(aChain); }

/**

Unlink the nfirst in the chain

*/

inline void RMBufChain::Unlink()

	{ if (!IsEmpty()) (static_cast<RMBuf*>(iNext))->UnlinkPkt(); }

/**

Returns next in the chain if there is next else returns the current

*/

inline RMBufChain& RMBufChain::Next()

	{ return IsEmpty() ? *this : (static_cast<RMBuf*>(iNext))->NextPkt(); }

/**

Returns next in the chain if there is next else returns the current

*/

inline const RMBufChain& RMBufChain::Next() const

	{ return IsEmpty() ? *this : (static_cast<RMBuf*>(iNext))->NextPkt(); }

/** 	  	 

Goto specified byte offset into an Mbuf chain. Used as part of copyin/out, split etc to position 	  	 

MBuf pointer and offset from start of iBuffer. 	  	 

@param aOffset The offset 	  	 

@param resBuf result buffer 	  	 

@param resOffset result offset 	  	 

@param resLength result length 	  	 

@param resPrevBuf result previous Buf in the chain 	  	 

@return ETrue if successful 	  	 

*/

inline TBool RMBufChain::Goto(TInt aOffset, RMBuf* &resBuf, TInt& resOffset, TInt& resLength) const

	{

	 RMBuf* prev;  return Goto(aOffset, resBuf, resOffset, resLength, prev);

	}

inline TInt RMBufChain::Copy(RMBufChain& newChain) const

    {

    return Copy(newChain, 0, KMBufAll, 0);

    }

inline TInt RMBufChain::Copy(RMBufChain& newChain, TInt aOffset) const

    {

    return Copy(newChain, aOffset, KMBufAll, 0);

    }

inline TInt RMBufChain::Copy(RMBufChain& newChain, TInt aOffset, TInt aLen) const

	{

	return Copy(newChain, aOffset, aLen, 0);

	}

#endif // KERNEL_MODE

#endif // __MBufChain_inl__