imgtools/imglib/parameterfileprocessor/source/parameterfileprocessor.cpp
author Jon Chatten
Mon, 08 Mar 2010 14:05:10 +0000
branchwip
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parent 0 044383f39525
child 590 360bd6b35136
permissions -rw-r--r--
release note: Add support for FEATUREVARIANTSAFE in BV builds.
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/*
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* Copyright (c) 2008-2009 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 the License "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: 
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* Class for processing parameter-file.
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* @internalComponent
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* @released
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*
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*/
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#include "parameterfileprocessor.h"
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/**
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Constructor of CParameterFileProcessor class
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@param aParamFileName parameter-file name
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@internalComponent
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@released
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*/
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CParameterFileProcessor::CParameterFileProcessor(String aParamFileName):
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												 iParamFileName(aParamFileName),iNoOfArguments(0),
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												 iParamFileArgs(NULL)
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{
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}	
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/**
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Function to open parameter-file
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@internalComponent
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@released
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@return True/False depending on the status of parameter-file open statement.
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*/
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bool CParameterFileProcessor::OpenFile()
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{
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	iParamFile.open(iParamFileName.data(),std::ios::binary);
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	if (iParamFile.is_open())
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		return true;
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	else
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	{		
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		std::cout<<"Error: Couldn't open parameter-file for reading:"<<iParamFileName.c_str()<<"\n";
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		return false;
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	}
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}
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/**
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Function to parse the parameter-file
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@internalComponent
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@released
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@return True/False depending on the status of parameter-file parsing.
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*/
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bool CParameterFileProcessor::ParameterFileProcessor()
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{
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	if(OpenFile())
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	{
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		while(!iParamFile.eof())
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		{
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			// Read the parameter-file line by line.
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			String line;
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			std::getline(iParamFile,line);
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			// Read the line till the occurence of character ';' or EOL.
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			unsigned int pos = line.find_first_of(";\r\n");
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			if (pos != std::string::npos)
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				line = line.substr(0,pos);
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			// Split the line if multiple parameters are provided
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			// in a single line.
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			if(!SplitLine(line))
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				return false;
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		}		
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		if (SetNoOfArguments() == false)
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		{
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			return false;
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		}
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		SetParameters();
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		// Close parameter-file 
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		CloseFile();
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		return true;		
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	}
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	else
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		return false;				
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}
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/**
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Function to split line of paramfile-file 
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@param aLine parameter-file line
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@internalComponent
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@released
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@return True/False depending on the status of spliting.
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*/
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bool CParameterFileProcessor::SplitLine(String& aLine)
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{
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	unsigned int startPos=0;
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	unsigned int endPos=0; 	
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	// Segregate parameters based on white-space or tabs.
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	startPos= aLine.find_first_not_of(" \t",endPos);
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	while(startPos != std::string::npos)
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	{		
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		endPos= aLine.find_first_of(" \t",startPos);
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		String paramStr= aLine.substr(startPos,endPos-startPos);
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		unsigned int position= aLine.find_first_of("\"",startPos);
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		// If the parameter contains double quotes('"') then also include the spaces(if provided)
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		// within the quotes.		
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		if((position!=std::string::npos) && position<=endPos)
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		{
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			endPos= aLine.find_first_of("\"",position+1);
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			if(endPos!= std::string::npos)
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			{				
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				endPos= aLine.find_first_of(" \t",endPos+1);
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				if(endPos != std::string::npos)
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				{
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					paramStr= aLine.substr(startPos,endPos-startPos);
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				}
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				// Remove '"' from parameter
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				for(unsigned int count =0;count<paramStr.size();count++)
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				{
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					if (paramStr.at(count) == '"')
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					{
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						paramStr.erase(count,count+1);
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					}
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				}
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			}
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			// Generate error message if enclosing quotes are not found.
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			else
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			{
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				std::cout<<"Error while parsing parameter-file"<<iParamFileName.c_str()<<". Closing \"\"\" not found\n";
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				return false;				
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			}
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		}
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		iParameters.push_back(paramStr);
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		startPos= aLine.find_first_not_of(" \t",endPos);
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	}	
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	return true;
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}
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/**
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Function to set number of parameters read.
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@return false if no parameters are specified in parameter-file, else true
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@internalComponent
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@released
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*/
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bool CParameterFileProcessor::SetNoOfArguments()
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{
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	unsigned int noOfArguements = iParameters.size();	
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	if (!noOfArguements)
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	{
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		std::cout<<"Warning: No parameters specified in paramer-file:"<<iParamFileName.data()<<"\n";
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		return false;
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	}
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	iNoOfArguments = noOfArguements+1;
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	return true;
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}
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/**
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Function to set the value of parameters read in the 
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form of 2D char array.
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@internalComponent
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@released
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*/
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void CParameterFileProcessor::SetParameters()
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{
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	// Store the parameters read in a 2D array of characters
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	unsigned int paramSize = iParameters.size();
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	iParamFileArgs=new char*[paramSize+1];			  
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	for (unsigned int count=1; count<=paramSize; count++)
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	{
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		String param = iParameters.at(count-1);
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		*(iParamFileArgs+count) = new char[param.size()+1];
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		strcpy(*(iParamFileArgs+count),param.c_str());
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	}
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}
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/**
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Function to close parameter-file
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@internalComponent
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@released
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*/
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void CParameterFileProcessor::CloseFile()
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{
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	iParamFile.close();	
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}
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/**
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Function to return number of parameters read from parameter-file
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@internalComponent
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@released
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@return iNoOfArguments - Number of parameters read from parameter-file
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*/
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unsigned int CParameterFileProcessor::GetNoOfArguments() const
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{
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	return iNoOfArguments;
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}
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/**
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Function to return parameters read from parameter-file
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@internalComponent
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@released
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@return iParamFileArgs - Parameters read from parameter-file
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*/
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char** CParameterFileProcessor::GetParameters() const
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{
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	return iParamFileArgs;
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}
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/**
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Destructor of CParameterFileProcessor class
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@internalComponent
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@released
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*/
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CParameterFileProcessor::~CParameterFileProcessor()
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{
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	for (unsigned int count=1;count<iNoOfArguments;count++)
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		delete[] *(iParamFileArgs+count);	
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}