/*

* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

* Class for processing parameter-file.

* @internalComponent

* @released

*

*/

#include "parameterfileprocessor.h"

/**

Constructor of CParameterFileProcessor class

@param aParamFileName parameter-file name

@internalComponent

@released

*/

CParameterFileProcessor::CParameterFileProcessor(const string& aParamFileName):

												 iParamFileName(aParamFileName),iNoOfArguments(0),

												 iParamFileArgs(NULL)

{

}	

/**

Function to open parameter-file

@internalComponent

@released

@return True/False depending on the status of parameter-file open statement.

*/

bool CParameterFileProcessor::OpenFile()

{

	iParamFile.open(iParamFileName.data(),ios_base::binary);

	if (iParamFile.is_open())

		return true;

	else

	{		

		cout<<"Error: Couldn't open parameter-file for reading:"<<iParamFileName.c_str()<<"\n";

		return false;

	}

}

/**

Function to parse the parameter-file

@internalComponent

@released

@return True/False depending on the status of parameter-file parsing.

*/

bool CParameterFileProcessor::ParameterFileProcessor()

{

	if(OpenFile())

	{

		while(!iParamFile.eof())

		{

			// Read the parameter-file line by line.

			string line;

			getline(iParamFile,line);

			// Read the line till the occurence of character ';' or EOL.

			unsigned int pos = line.find_first_of(";\r\n");

			if (pos != string::npos)

				line = line.substr(0,pos);

			// Split the line if multiple parameters are provided

			// in a single line.

			if(!SplitLine(line))

				return false;

		}		

		if (SetNoOfArguments() == false)

		{

			return false;

		}

		SetParameters();

		// Close parameter-file 

		CloseFile();

		return true;		

	}

	else

		return false;				

}

/**

Function to split line of paramfile-file 

@param aLine parameter-file line

@internalComponent

@released

@return True/False depending on the status of spliting.

*/

bool CParameterFileProcessor::SplitLine(string& aLine)

{

	unsigned int startPos=0;

	unsigned int endPos=0; 	

	// Segregate parameters based on white-space or tabs.

	startPos= aLine.find_first_not_of(" \t",endPos);

	while(startPos != string::npos)

	{		

		endPos= aLine.find_first_of(" \t",startPos);

		string paramStr= aLine.substr(startPos,endPos-startPos);

		unsigned int position= aLine.find_first_of("\"",startPos);

		// If the parameter contains double quotes('"') then also include the spaces(if provided)

		// within the quotes.		

		if((position!=string::npos) && position<=endPos)

		{

			endPos= aLine.find_first_of("\"",position+1);

			if(endPos!= string::npos)

			{				

				endPos= aLine.find_first_of(" \t",endPos+1);

				if(endPos != string::npos)

				{

					paramStr= aLine.substr(startPos,endPos-startPos);

				}

				// Remove '"' from parameter

				for(unsigned int count =0;count<paramStr.size();count++)

				{

					if (paramStr.at(count) == '"')

					{

						paramStr.erase(count,count+1);

					}

				}

			}

			// Generate error message if enclosing quotes are not found.

			else

			{

				cout<<"Error while parsing parameter-file"<<iParamFileName.c_str()<<". Closing \"\"\" not found\n";

				return false;				

			}

		}

		iParameters.push_back(paramStr);

		startPos= aLine.find_first_not_of(" \t",endPos);

	}	

	return true;

}

/**

Function to set number of parameters read.

@return false if no parameters are specified in parameter-file, else true

@internalComponent

@released

*/

bool CParameterFileProcessor::SetNoOfArguments()

{

	unsigned int noOfArguements = iParameters.size();	

	if (!noOfArguements)

	{

		cout<<"Warning: No parameters specified in paramer-file:"<<iParamFileName.data()<<"\n";

		return false;

	}

	iNoOfArguments = noOfArguements+1;

	return true;

}

/**

Function to set the value of parameters read in the 

form of 2D char array.

@internalComponent

@released

*/

void CParameterFileProcessor::SetParameters()

{

	// Store the parameters read in a 2D array of characters

	unsigned int paramSize = iParameters.size();

	iParamFileArgs=new char*[paramSize+1];			  

	for (unsigned int count=1; count<=paramSize; count++)

	{

		string param = iParameters.at(count-1);

		*(iParamFileArgs+count) = new char[param.size()+1];

		strcpy(*(iParamFileArgs+count),param.c_str());

	}

}

/**

Function to close parameter-file

@internalComponent

@released

*/

void CParameterFileProcessor::CloseFile()

{

	iParamFile.close();	

}

/**

Function to return number of parameters read from parameter-file

@internalComponent

@released

@return iNoOfArguments - Number of parameters read from parameter-file

*/

unsigned int CParameterFileProcessor::GetNoOfArguments() const

{

	return iNoOfArguments;

}

/**

Function to return parameters read from parameter-file

@internalComponent

@released

@return iParamFileArgs - Parameters read from parameter-file

*/

char** CParameterFileProcessor::GetParameters() const

{

	return iParamFileArgs;

}

/**

Destructor of CParameterFileProcessor class

@internalComponent

@released

*/

CParameterFileProcessor::~CParameterFileProcessor()

{

	for (unsigned int count=1;count<iNoOfArguments;count++)

		delete[] *(iParamFileArgs+count);	

}