// Copyright (c) 2003-2009 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 <ezfilebuffer.h>

#include <ezstream.h>

_LIT(KFileBuffer,"FileBuffer");

void CEZFileBufferManager::ConstructL(TInt aBufferSize)

	{

	__ASSERT_ALWAYS(aBufferSize > 0, User::Panic(KFileBuffer, EBadInitialization));

	iBufferSize = aBufferSize;

	iInputBuffer = new (ELeave) TUint8[iBufferSize];

	iOutputBuffer = new (ELeave) TUint8[iBufferSize];

	iInputDescriptor.Set(iInputBuffer,0,iBufferSize);

	iOutputDescriptor.Set(iOutputBuffer,0,iBufferSize);

	}

CEZFileBufferManager::~CEZFileBufferManager()

	{

	delete[] iInputBuffer;

	delete[] iOutputBuffer;

	}

CEZFileBufferManager::CEZFileBufferManager(RFile &aInput, RFile &aOutput) : 

	iInputFile(aInput), iOutputFile(aOutput), iInputDescriptor(NULL,0), iOutputDescriptor(NULL,0)

	{

	}

/**

Creates a new CEZFileBufferManager object and leave it on the CleanupStack

@param aInput the input file

@param aOutput the output file

@param aBufferSize the required size of the buffers

@return the new CEZFileBufferManager object, on the CleanupStack

*/

EXPORT_C CEZFileBufferManager* CEZFileBufferManager::NewLC(RFile &aInput, RFile &aOutput, TInt aBufferSize)

	{

	CEZFileBufferManager *fb = new (ELeave) CEZFileBufferManager(aInput,aOutput);

	CleanupStack::PushL(fb);

	fb->ConstructL(aBufferSize);

	return fb;

	}

/**

Creates a new CEZFileBufferManager object

@param aInput the input file

@param aOutput the output file

@param aBufferSize the required size of the buffers

@return the new CEZFileBufferManager object

*/

EXPORT_C CEZFileBufferManager* CEZFileBufferManager::NewL(RFile &aInput, RFile &aOutput, TInt aBufferSize)

	{

	CEZFileBufferManager *fb = new (ELeave) CEZFileBufferManager(aInput,aOutput);

	CleanupStack::PushL(fb);

	fb->ConstructL(aBufferSize);

	CleanupStack::Pop();

	return fb;

	}

void CEZFileBufferManager::InitializeL(CEZZStream &aZStream)

	{

	User::LeaveIfError(iInputFile.Read(iInputDescriptor));

	aZStream.SetInput(iInputDescriptor);

	aZStream.SetOutput(iOutputDescriptor);

	}

void CEZFileBufferManager::NeedInputL(CEZZStream &aZStream)

	{

	User::LeaveIfError(iInputFile.Read(iInputDescriptor));

	aZStream.SetInput(iInputDescriptor);

	}

void CEZFileBufferManager::NeedOutputL(CEZZStream &aZStream)

	{

	TPtrC8 od = aZStream.OutputDescriptor();

	User::LeaveIfError(iOutputFile.Write(od));

	aZStream.SetOutput(iOutputDescriptor);

	}

void CEZFileBufferManager::FinalizeL(CEZZStream &aZStream)

	{

	TPtrC8 od = aZStream.OutputDescriptor();

	User::LeaveIfError(iOutputFile.Write(od));

	}