/*

* Copyright (c) 2005-2009 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: 

* @internalComponent 

* @released

*

*/

#include "image_handler.h"

#include "r_obey.h"

#include "r_romnode.h"

#include "r_coreimage.h"

#include "rofs_image_reader.h"

#include "rom_image_reader.h"

#include "e32_image_reader.h"

#include "e32rom.h"

#include "sis2iby.h"

#include <time.h>

ECompression gCompress=ECompressionUnknown;

ostream *out = &cout;

string ImageReader::iE32ImgFileName = "";

string ImageReader::iZdrivePath = "";

string ImageReader::iLogFileName = "";

string ImageReader::iPattern = "";

string SisUtils::iOutputPath = ".";

string SisUtils::iExtractPath = ".";

TBool gIsOBYUTF8 = EFalse;

ImageHandler::ImageHandler() : iReader(NULL) ,iOptions(0), iSisUtils(NULL) {

}

ImageHandler::~ImageHandler() {

	if(iReader)

		delete iReader;

	if(iSisUtils)

		delete iSisUtils;

}

void ImageHandler::ProcessArgs(int argc, char*argv[]) {

	if( argc < 2) {

		throw ImageReaderUsageException("", "");

	}

	bool aOutFileGiven = false;

	int index = 1; 

	while( argc > index ) {

		char* arg = argv[index]; 

		if(arg[0] == '-') {

			switch(0x20 | arg[1]) {

			case 'd': 

				//dump header info

				iOptions |= DUMP_HDR_FLAG;

				break;

			case 'e': 

				iOptions |= DUMP_E32_IMG_FLAG; 

				++index ;

				if(index < argc) {

					arg = argv[index];

					ImageReader::iE32ImgFileName = string(arg);

				}

				else 

					throw ImageReaderUsageException("Usage error", arg);

				break;

			case 'h': 

				PrintUsage();

				exit(EXIT_SUCCESS);

			case 'o':  

				if(arg[2]) {

					if((stricmp(arg,"-OUTDIR")==0)) {

						++index;

						if(index < argc) {

							arg = argv[index];

							SisUtils::iOutputPath = string(arg);

						}

						else

							throw ImageReaderUsageException("Usage Error", arg); 

					}

					else

						throw ImageReaderUsageException("Usage Error", arg);

				}

				else {

					aOutFileGiven = true;

					++index;				

					if( index < argc ) {

						// unless using iOutFile.c_str() immediately after 

						// iOutFile = argv[index+1];

						// iOutFile will not be assign correctly,

						// is it a defect of gcc 3.4.5 ? 

						arg = argv[index];

						iOutFile = string(arg); 

					}

					else

						throw ImageReaderUsageException("Usage Error", arg); 

				}

				break;

			case 'r': 				 

				if(arg[2])

					throw ImageReaderUsageException("Usage Error", arg);

				iOptions |= RECURSIVE_FLAG;				 

				break;

			case 's': 				

				if(arg[2]) {

					if(stricmp(arg,"-SIS2IBY")==0) {

						iOptions |= MODE_SIS2IBY;

					}

					else

						throw ImageReaderUsageException("Usage Error", arg);

				}

				else

					iOptions |= DUMP_DIR_ENTRIES_FLAG;

				break;

			case 't': 				 

				if((stricmp(argv[index],"-TMPDIR")==0)) {

					++index;

					if( index < argc ) {  

						arg = argv[index];

						SisUtils::iExtractPath = string(arg);

					}

					else

						throw ImageReaderUsageException("Usage Error", arg); 

				}

				else

					throw ImageReaderUsageException("Usage Error", arg);

				break;

			case 'v':  

				if(arg[2])

					throw ImageReaderUsageException("Usage Error", arg);

				iOptions |= DUMP_VERBOSE_FLAG; 

				break;

			case 'l': 

				++index;

				if(index < argc) {

					arg = argv[index];

					ImageReader::iLogFileName = string(arg);

				}

				else

					throw ImageReaderUsageException("Usage error", arg);

				iOptions |= LOG_IMAGE_CONTENTS_FLAG;

				break;

			case 'x': 

				++index;

				if(index < argc && 0 == arg[2]) {

					arg = argv[index];

					ImageReader::iPattern = string(arg);

				}

				else

					throw ImageReaderUsageException("Usage error", arg);

				iOptions |= EXTRACT_FILE_SET_FLAG; 

				break;

			case 'z': 

				++index;

				if(index < argc ){

					arg = argv[index];

					ImageReader::iZdrivePath = string(arg);

				}

				else

					throw ImageReaderUsageException("Usage error", arg);					

				iOptions |= EXTRACT_FILES_FLAG; 

				break;

			default:

				throw ImageReaderUsageException("Invalid command", arg);

				break;

			}

		}

		else {

			if(!iInputFileName.empty()) {

				throw ImageReaderUsageException("Invalid command", "Multiple input file not supported");

			}

			SetInputFile(string(arg));

		}

		index++;

	}

	if( aOutFileGiven && !(iOptions & MODE_SIS2IBY) ) {

		ofstream* rdout = new ofstream(iOutFile.c_str(), ios_base::out | ios_base::trunc);

		if( !rdout->is_open()){

			delete rdout ;

			rdout = NULL ;

			throw ImageReaderException(iOutFile.c_str(), "Unable to open File");

		}

		out = rdout ;

	}

	// Disable -z option if -x option is passed

	if( (iOptions & EXTRACT_FILE_SET_FLAG) && (iOptions & EXTRACT_FILES_FLAG) ) {

		iOptions &= ~(EXTRACT_FILES_FLAG);

	}

	// -r option should be used along with -x option

	if( (iOptions & RECURSIVE_FLAG) && !(iOptions & EXTRACT_FILE_SET_FLAG) ) {

		throw ImageReaderUsageException("Usage error", "-r should be used with -x");

	}

}

EImageType ImageHandler::ReadMagicWord() {

	ifstream file(iInputFileName.c_str(), ios_base::in | ios_base::binary );

	EImageType retVal = EUNKNOWN_IMAGE;

	if( !file.is_open() ) {

		throw ImageReaderException(iInputFileName.c_str(), "Cannot open file ");

	}

	TUint8 magicWords[16];

	file.read(reinterpret_cast<char*>(magicWords),16);

	if(0 == memcmp(magicWords,"ROFS",4)) {		 

		retVal = EROFS_IMAGE; 			

	}else if(0 == memcmp(magicWords,"ROFx",4)) {

		retVal = EROFX_IMAGE;

	}

	else if(0 == memcmp(magicWords,"EPOC",4) && 0 == memcmp(&magicWords[8],"ROM",3) ) {		 

		retVal = EROM_IMAGE; 

	}

	else {

		E32ImageFile	aE32;

		TUint32			aSz;

		file.seekg(0,ios_base::end);

		aSz = file.tellg();

		file.seekg(0,ios_base::beg);			 

		aE32.Adjust(aSz);

		aE32.iFileSize = aSz;

		file  >> aE32;

		if(aE32.iError == KErrNone){

			retVal = EE32_IMAGE;

		}

		else {

			TExtensionRomHeader exRomHeader;

			file.seekg(0, ios_base::beg);

			file.read(reinterpret_cast<char*>(&exRomHeader), sizeof(TExtensionRomHeader));

			TUint zeroTime = time(0);

			// aExtensionRomHeader.iTime and aExtensionRomHeader.iKernelTime are 

			// in microseconds. So convert them to seconds and see if these are 

			// valid times e.g. a time(in seconds) after midnight Jan 1st, 1970

			TUint imgTime = exRomHeader.iTime / 1000000;

			TUint kernImgTime = exRomHeader.iKernelTime / 1000000;

			if( imgTime >= zeroTime && kernImgTime >= zeroTime) {

				//Check if the padding in the header has value 0xff

				retVal = EROMX_IMAGE;

				for(int i = sizeof(exRomHeader.iPad) - 1 ; i >= 0 ; i--){

					if(0xff != exRomHeader.iPad[i]){

						retVal = EUNKNOWN_IMAGE;

						break ;

					}

				}  

			}

		}		 

	}   

	if(retVal == EUNKNOWN_IMAGE){

		file.seekg(0,ios_base::beg);

        retVal = ReadBareImage(file);

	}

	file.close();

	return retVal;

}

/**

 * @fn ImageHandler::ReadBareImage

 * @brief this function processes image type under the condition of that if an image is given without header which means the image is not self-described

 * @return type of the image.

 */

EImageType ImageHandler::ReadBareImage(ifstream& aIfs) {

    TRomHeader romHdr ; 

    aIfs.read(reinterpret_cast<char*>(&romHdr),sizeof(TRomHeader)); 

    return ((romHdr.iRomBase >= KRomBase ) && 

		(romHdr.iRomRootDirectoryList > KRomBase ) &&

       (romHdr.iRomBase < KRomBaseMaxLimit ) && 

	   (romHdr.iRomRootDirectoryList < KRomBaseMaxLimit)) ? EBAREROM_IMAGE : EUNKNOWN_IMAGE;

}

void ImageHandler::HandleInputFiles() {

	if(!(iOptions & MODE_SIS2IBY)) {

		EImageType imgType = ReadMagicWord();

		switch(imgType)

		{

		case EROFS_IMAGE:

		case EROFX_IMAGE:

			iReader = new RofsImageReader(iInputFileName.c_str());

			break;

		case EROM_IMAGE:

			iReader = new RomImageReader(iInputFileName.c_str());

			break;

        case EBAREROM_IMAGE:

            iReader = new RomImageReader(iInputFileName.c_str(), EBAREROM_IMAGE);

            break;

		case EROMX_IMAGE:

			iReader = new RomImageReader(iInputFileName.c_str(), EROMX_IMAGE);

			break;

		case EE32_IMAGE:

			iReader = new E32ImageReader(iInputFileName.c_str());

			break;

		default:

			{

            throw ImageReaderException(iInputFileName.c_str(), "Unknown Type of Image file");

			}

			break;

		}

		if(iReader) {

			iReader->ReadImage();

			iReader->ProcessImage();

			iReader->Validate();

			iReader->SetDisplayOptions( iOptions );

			iReader->ExtractImageContents();

			iReader->Dump();

		}

	}

	else {

		if(iInputFileName.empty()) {

			throw SisUtilsException("Usage Error", "No SIS file passed");

		}

		iSisUtils = new Sis2Iby(iInputFileName.c_str());

		if(iSisUtils) {

			if(iOptions & DUMP_VERBOSE_FLAG) {

				iSisUtils->SetVerboseMode();

			}

			iSisUtils->ProcessSisFile();

			iSisUtils->GenerateOutput();

		}

		else {

			throw SisUtilsException("Error:", "Cannot create Sis2Iby object");

		}

	}

}

void ImageHandler::PrintVersion() {

	*out << "\nReadimage - reader for Rom, Rofs and E32 images V";

	out->width(1);

	*out << MajorVersion << ".";

	out->width(2);

	out->fill('0');

	*out << MinorVersion << " (";

	out->width(3);

	*out << Build  << ") " << endl;

	*out << Copyright;

}

void ImageHandler::PrintUsage() {

	PrintVersion();

	const char aUsage[] = 

		"Usage: readImage [options] [<-sis2iby> [sis-options]] <filename>\n\n"

		"Options: With no options, it prints the files and directories in image\n"

		"       -o      output file name\n"

		"       -d      dump header information(default)\n"

		"       -s      dump the directory structure\n"

		"       -v      dump image headers and directory structure\n"

		"       -e xxx  dump the xxx e32 image within the entire image when used along with -v or -s option\n"

		"       -h      this message\n"

		"       -z xxx  extract all the file(s) from the given image to xxx location\n"

		"       -l xxx  log the image contents on to xxx file\n"

		"       -x xxx  extract single or set of files as given in xxx from the given image\n"

		"       -r      recursively extract files from the sub-directories when used along with -x option\n\n"

		"SIS-options: Option -sis2iby changes the mode to generate IBY from SIS file\n"

		"       -sis2iby      generates iby file for the given SIS file\n"

		"       -tmpdir xxx   extract all sis file contents to xxx location\n"

		"       -outdir xxx   generates the iby file(s) to xxx location\n"

		"       -v            verbose output\n";

	*out << aUsage << endl;

}

int main(int argc, char* argv[]) {

	ImageHandler aIh;

	int retVal = EXIT_SUCCESS;

	try {

		aIh.ProcessArgs(argc, argv);

		aIh.HandleInputFiles();

	}

	catch(ImageReaderUsageException& aIre) {

		if(argc >= 2) {

			//This is a usage error and has to be reported

			//Otherwise, it is called just to display the usage

			aIre.Report();

		}

		aIh.PrintUsage();

		retVal = EXIT_FAILURE;

	}

	catch(ImageReaderException& aIre) {

		aIre.Report();

		retVal = EXIT_FAILURE;

	}

	catch(SisUtilsException& aSUe) {

		aSUe.Report();

		retVal = EXIT_FAILURE;

	}

	if(out != &cout){

		ofstream* rdout = static_cast<ofstream*>(out) ;

		rdout->close() ;

		delete rdout ; 

	}

	return retVal;

}