ImagePrint/ImagePrintEngine/DeviceProtocols/btprotocol/src/cxmlhandler.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:45:53 +0200
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/*
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* Copyright (c) 2004-2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Handler for XML file modify. Defines the class to store and modify XML data.
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*
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*/
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#ifdef _DEBUG
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#include <driveinfo.h>
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#include <pathinfo.h>
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#endif
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#include "cxmlhandler.h"
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#include "clog.h"
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::NewL
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//
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//--------------------------------------------------------------------------------------------
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CXmlHandler* CXmlHandler::NewL()
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	{
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		CXmlHandler *self = NewLC();
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		CleanupStack::Pop();	// self
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		return self;
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	}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::NewLC
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//
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//--------------------------------------------------------------------------------------------
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CXmlHandler* CXmlHandler::NewLC()
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	{
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		CXmlHandler *self = new (ELeave) CXmlHandler();
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		CleanupStack::PushL(self);
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		self->ConstructL();
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		return self;
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	}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::~CXmlHandler
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//
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//--------------------------------------------------------------------------------------------
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CXmlHandler::~CXmlHandler()
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{
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	if(iDataBuf)
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		delete iDataBuf;
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	iDataBuf = NULL;
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	Reset();
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	iFs.Close();
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::ConstructL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::ConstructL()
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{
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	LOG("[CXmlHandler::ConstructL]\t");
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	User::LeaveIfError( iFs.Connect() );
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	Reset();
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::InitFromFileL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::InitFromFileL(const TDesC& aFile, const TInt aId)
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{
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	LOG("[CXmlHandler::InitFromFileL]\t");
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	Reset();
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	ReadFileL(aFile);
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	iBufferId = aId;
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	LOG("[CXmlHandler::InitFromFileL]\t Done.");
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::InitFromBufferL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::InitFromBufferL(const TDesC8& aBuffer, const TInt aId)
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{
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	LOG("[CXmlHandler::InitFromBufferL]\t");
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	Reset();
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	if(0 >= aBuffer.Length())
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	{
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		User::Leave(KErrArgument);
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	}
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	iDataBuf = static_cast<HBufC8*>(User::LeaveIfNull(aBuffer.AllocL()));
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	iBufferId = aId;
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	LOG("[CXmlHandler::InitFromBufferL]\t Done.");
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::Reset
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::Reset()
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{
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	LOG("[CXmlHandler::Reset]\t");
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	if(iDataBuf)
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		delete iDataBuf;
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	iDataBuf = NULL;
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	iBufferId = KErrNotFound;
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::Reset
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//
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//--------------------------------------------------------------------------------------------
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TInt CXmlHandler::BufferId()
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{
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	return iBufferId;
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::Reset
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//
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//--------------------------------------------------------------------------------------------
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TPtrC8 CXmlHandler::Buffer()
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{
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	if(iDataBuf)
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		return iDataBuf->Des();
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	return KNullDesC8();
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}
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// PRIVATE
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::CXmlHandler
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//
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//--------------------------------------------------------------------------------------------
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CXmlHandler::CXmlHandler()
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{
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::FinalizeBufferL
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//
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//--------------------------------------------------------------------------------------------
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TPtrC8 CXmlHandler::FinalizeBufferL(const TDesC8& aTag)
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{
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	LOG("[CXmlHandler]\t FinalizeBufferL");
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	User::LeaveIfNull(iDataBuf);
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	// Cut the template to the end tag
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	TInt pos = iDataBuf->Find(aTag);
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	if(KErrNotFound == pos)
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		User::Leave(KErrCorrupt);
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	TInt dataLen = pos + aTag.Length();
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	TPtrC8 tail = iDataBuf->Left(dataLen);
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	return tail;
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::DeleteBufferData
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::DeleteBufferData(TInt aOffset, TInt aLength)
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{
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	iDataBuf->Des().Delete(aOffset, aLength);
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::ReadL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::ReadFileL(const TDesC& aFileName)
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{
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	LOG("[CXmlHandler]\t ReadFileL");
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	// Open the template file and read it into buffer
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	RFile templateFile;
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	CleanupClosePushL(templateFile);
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	User::LeaveIfError( templateFile.Open( iFs, aFileName, EFileRead) );
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	TInt fileSize = 0;
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	TInt err = templateFile.Size(fileSize);
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	if(KErrNone != err)
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		fileSize = KBtMaxFileSize;
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	iDataBuf = HBufC8::NewL(fileSize);
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	TPtr8 bufferPtr( iDataBuf->Des() );
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	bufferPtr.Zero();
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	templateFile.Read(bufferPtr);
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	CleanupStack::PopAndDestroy(&templateFile);
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::GetDataL
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//
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//--------------------------------------------------------------------------------------------
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TPtrC8 CXmlHandler::GetDataL(const TDesC8 &aStart, const TDesC8 &aEnd, TInt& aOffset)
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{
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	User::LeaveIfNull(iDataBuf);
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	return ParseValue(iDataBuf->Des(), aStart, aEnd, aOffset);
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::GetDataListL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::GetDataListL(const TDesC8 &aStart, const TDesC8 &aEnd, CDesC8ArrayFlat& aList)
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{
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	User::LeaveIfNull(iDataBuf);
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	ParseValueListL(iDataBuf->Des(), aStart, aEnd, aList);
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::ParseValue
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//
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//--------------------------------------------------------------------------------------------
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TPtrC8 CXmlHandler::ParseValue(const TDesC8 &aData, const TDesC8 &aStart, const TDesC8 &aEnd, TInt& aOffset)
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{
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//	LOG82("[CXmlHandler::ParseValue]\t s: %S, e: %S", &aStart, &aEnd);
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	aOffset = aData.Find(aStart);
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	if(0 > aOffset)
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	{
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		return KNullDesC8();
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	}
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	TInt end = aData.Find(aEnd);
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	TInt len = end-aOffset-aStart.Length();
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	if(0 >= len)
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	{
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		aOffset = end;
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		return KNullDesC8();
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	}
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	return aData.Mid(aOffset+aStart.Length(), len);
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::ParseValueList
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::ParseValueListL(const TDesC8 &aData, const TDesC8 &aStart, const TDesC8 &aEnd, CDesC8ArrayFlat& aList)
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{
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	LOG("[CXmlHandler::ParseValueListL]\t ");
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	TPtrC8 tmpPtr = aData;
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	TInt offset = tmpPtr.Find(aStart);
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	while(offset != KErrNotFound)
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	{
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		TInt end = tmpPtr.Find(aEnd);
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		if(0 > end)
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		{
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			return;
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		}
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		TPtrC8 valuePtr = tmpPtr.Mid(offset+aStart.Length(), end-offset-aStart.Length());
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   296
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		HBufC8* listEntry = valuePtr.AllocLC();
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		aList.AppendL(listEntry->Des());
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		CleanupStack::PopAndDestroy();	// listEntry
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   300
		
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		tmpPtr.Set( tmpPtr.Right(tmpPtr.Length()-(end+aEnd.Length()) ) );
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		offset = tmpPtr.Find(aStart);
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   303
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	}
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::ComposeDataL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::ComposeDataL(const TInt aValue, const TDesC8 &aTag)
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{
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	TBuf8<KDefaultRealWidth> valueStr;
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	valueStr.Zero();
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	valueStr.AppendNum(aValue);
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	ComposeDataL(valueStr, aTag);
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}
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::ComposeDataL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::ComposeDataL(const TDesC8 &aData, const TDesC8 &aTag)
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{
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	User::LeaveIfNull(iDataBuf);
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   329
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	TInt pos = iDataBuf->Find(aTag);
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	if(KErrNotFound == pos)
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		User::Leave(KErrCorrupt);
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   333
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	while(KErrNotFound != pos)
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	{
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		TInt requiredSize = iDataBuf->Des().Length() + aData.Length();
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		if(iDataBuf->Des().MaxLength() < requiredSize)
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		{
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			iDataBuf = iDataBuf->ReAllocL(requiredSize);
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		}
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		iDataBuf->Des().Replace(pos, aTag.Length(), aData);
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		pos = iDataBuf->Find(aTag);
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	}
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}
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   345
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//--------------------------------------------------------------------------------------------
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//
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// CXmlHandler::InsertDataL
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//
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//--------------------------------------------------------------------------------------------
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void CXmlHandler::InsertDataL(const TDesC8 &aData, const TInt aOffset)
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{
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	TInt requiredSize = iDataBuf->Des().Length() + aData.Length();
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	if(iDataBuf->Des().MaxLength() < requiredSize)
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	{
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		iDataBuf = iDataBuf->ReAllocL(requiredSize);
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	}
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	iDataBuf->Des().Insert(aOffset, aData);
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}
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parents:
diff changeset
   360
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   361
// End of file