/*

* Copyright (c) 2006-2009 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: 

*

*/

#include "TMSTD.H"

CTmBufferBase::~CTmBufferBase()

	{

	User::Free(iData);

	}

void CTmBufferBase::Truncate(TInt aLength)

	{

	if (aLength > iLength || aLength < 0)

		TmPanic(EBadTruncationLength);

	iLength = aLength;

	}

TAny* CTmBufferBase::ExtendL(TInt aSizeOfData)

	{

	if (iLength == iAllocated)

		GrowL(iExpandSize,aSizeOfData);

	TInt offset = iLength * aSizeOfData;

	iLength += 1;

	return REINTERPRET_CAST(TUint8*,iData) + offset;

	}

void CTmBufferBase::DoAppendL(const TAny* aItem,TInt aCount,TInt aSizeOfData)

	{

	int deficit = iLength + aCount - iAllocated;

	if (deficit > 0)

		{

		int n = deficit % iExpandSize;

		if (n)

			deficit += iExpandSize - n;

		GrowL(deficit,aSizeOfData);

		}

	Mem::Copy(REINTERPRET_CAST(TUint8*,iData) + iLength * aSizeOfData, aItem,

		aCount * aSizeOfData);

	iLength += aCount;

	}

void CTmBufferBase::GrowL(TInt aExtra,TInt aSizeOfData)

	{

	iData = User::ReAllocL(iData,(iAllocated + aExtra) * aSizeOfData);

	iAllocated += aExtra;

	}