/*

* 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: 

*

*/

#include "memmap.h"

/**

Constructor: Memmap class

Initilize the parameters to data members.

@internalComponent

@released

@param aFillFlg	- Flag to enable the initialisation of memory map

@param aOutputFile - Name of the output file

*/

Memmap::Memmap( int aFillFlg, const string& aOutputFile )

: iOutFileName(aOutputFile), iData(0), iMaxMapSize(0), iStartOffset(0), iFillFlg(aFillFlg) {

	iUtils = new MemmapUtils();

}

/**

Constructor: Memmap class

Initilize the parameters to data members.

@internalComponent

@released

@param aFillFlg	- Flag to enable the initialisation of memory map

*/

Memmap::Memmap( int aFillFlg )

: iData(0), iMaxMapSize(0), iStartOffset(0), iFillFlg(aFillFlg) {

	iUtils = new MemmapUtils();

}

/**

Destructor: Memmap class

Deallocates the memory for data members

@internalComponent

@released

*/

Memmap::~Memmap( ) {

	if(iData) {

		CloseMemoryMap();

	}

	if(iUtils) {

		delete iUtils;

	}

}

/**

SetOutputFile: To set the output image file

@internalComponent

@released

@param aOutputFile  - Name of the output image file

*/

void Memmap::SetOutputFile(const string& aOutputFile ) {

	iOutFileName = aOutputFile;

}

/**

SetMaxMapSize: To set the maximum size of the memory map

@internalComponent

@released

@param aMaxSize  - Size of the memory map

*/

void Memmap::SetMaxMapSize( unsigned long aMaxSize )

{ 

	iMaxMapSize = aMaxSize; 

};

/**

GetMapSize: To get the size of the memory map

@internalComponent

@released

*/

unsigned long Memmap::GetMapSize( )

{ 

	return iMaxMapSize; 

}

/**

operator[]: To access the memory map contents

@internalComponent

@released

@param aIndex - Offset of the memory map location

*/

char& Memmap::operator[]( unsigned long aIndex )

{ 

	return iData[aIndex]; 

}

/**

CreateMemoryMap: 

Opens the memory map file

Initialises the map size member

Create the memory map pointer

Fill the memory map with the specified value

@internalComponent

@released

@param aStartOffset - Start offset of the memory map location

@param aFillVal - Value to be filled in the memory map

*/

int Memmap::CreateMemoryMap( unsigned long aStartOffset, unsigned char aFillVal ) {

	if((!iMaxMapSize) || (aStartOffset > iMaxMapSize)) {

		return KStatFalse;

	}

	else if(iUtils->IsMapFileOpen() && iData) {

		iStartOffset = aStartOffset;

		return KStatTrue;

	}

	if(iUtils->IsMapFileOpen() == KStatFalse) {

		if(iUtils->OpenMapFile() == KStatFalse) {

			return KStatFalse;

		}

	}

	if(iUtils->CreateFileMapObject(iMaxMapSize) == KStatFalse) {

		return KStatFalse;

	}

	iData = (char*)(iUtils->OpenMemMapPointer(0,iMaxMapSize));

	if( !iData ) {

		return KStatFalse;

	}

	iStartOffset = aStartOffset;

	if(iFillFlg) {

		return FillMemMap( aFillVal );

	}

	return KStatTrue;

}

/**

CloseMemoryMap: Close the memory map and the associated objects

@internalComponent

@released

@param aCloseFile - Flag to close the memory map file

*/

void Memmap::CloseMemoryMap( int aCloseFile ) {

	// Close map view pointer

	if(!iUtils->CloseMemMapPointer((void*)iData, iMaxMapSize)) {

		Print(ELog, "Failed to unmap the memory map object");

	}

	iData = 0;

	iUtils->CloseFileMapObject();

	// Close map file

	if(aCloseFile) {

		iUtils->CloseMapFile();

	}

}

/**

GetMemoryMapPointer: Get the stating address of the memory map

@internalComponent

@released

*/

char *Memmap::GetMemoryMapPointer( ) {

	if(iData)

		return (iData + iStartOffset);

	return KStatFalse;

}

/**

WriteToOutputFile: Writes the memory map contents to the output file

@internalComponent

@released

*/

void Memmap::WriteToOutputFile( ) {

	if(!iData) {

		Print(EAlways, "Memory map has not been created");

	}

	if(iOutFileName.empty()) {

		Print(EAlways, "Output file has not been set");

		return;

	}

	ofstream ofs(iOutFileName.c_str(), ios_base::out + ios_base::binary );

	if(!ofs.is_open()) {

		Print(EAlways, "Cannot open output file %s", (char*)iOutFileName.data());

		return;

	}

	ofs.write((const char*)(iData + iStartOffset), (iMaxMapSize - iStartOffset));

	ofs.close();

	return;

}

/**

FillMemMap: Fills the memory map with the specified value

@internalComponent

@released

@param aFillVal - Value to be filled

*/

int Memmap::FillMemMap( unsigned char aFillVal ) {

	if(iData) {

		// Fill the value

		memset(iData, aFillVal, iMaxMapSize);

		// Unmap the file

		if(iUtils->CloseMemMapPointer((void*)iData, iMaxMapSize) == KStatFalse) {

			return KStatFalse;

		}

		// Map it again

		iData = (char*)(iUtils->OpenMemMapPointer(0,iMaxMapSize));

		if(!iData) {

			return KStatFalse;

		}

	}

	return KStatTrue;

}