// Copyright (c) 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 "LogDynBuf.h"

/**

Constructs RLogDynBuf object with the specified granularity.

@param aGranularity RLogDynBuf granularity. 

@endcode

@leave KErrNoMemory Out of memory.

*/

void RLogDynBuf::CreateLC(TInt aGranularity)

	{

	iGranularity = aGranularity;

	iBuf.CreateL(aGranularity);

	CleanupClosePushL(*this);

	}

/**

Destroys the buffer

*/

void RLogDynBuf::Close()

	{

	iBuf.Close();	

	}

/**

Attempts to append aStr to the end of the buffer. If the buffer has not enough available space,

AppendL() will try to expand the buffer before the append operation.

@param aStr 16-bit desrpiptor to be appended to the end of the buffer.

@leave KErrNoMemory Out of memory.

*/	

void RLogDynBuf::AppendL(const TDesC& aStr)

	{

	DoAllocL(aStr.Length());

	iBuf.Append(aStr);

	}

/**

If aLen is bigger than the available buffer space, the buffer will be expanded.

@param aLen The new size of the buffer, in bytes.  

@leave KErrNoMemory Out of memory.

*/

void RLogDynBuf::DoAllocL(TInt aLen)

	{

	__ASSERT_DEBUG(aLen >= 0, User::Invariant());

	const TInt len = iBuf.Length();

	TInt maxLen = iBuf.MaxLength();

	TInt available = maxLen - len;

	TInt overflow = aLen - available;

	if(overflow > 0)

		{

		iBuf.ReAllocL(maxLen + (overflow / iGranularity + 1) * iGranularity);

		}

	}