/*

* 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_reader.h"

#include <stdio.h>

#include <stdlib.h>

#include <boost/filesystem.hpp>

using namespace boost::filesystem;

ImageReader::ImageReader(const char* aFile) : iDisplayOptions(0),iImgFileName(aFile) {

}

ImageReader::~ImageReader() {

}

void ImageReader::SetDisplayOptions(TUint32 aFlag) {

	iDisplayOptions |= aFlag;

}

bool ImageReader::DisplayOptions(TUint32 aFlag) {

	return ((iDisplayOptions & aFlag) != 0);

}

void ImageReader::DumpData(TUint* aData, TUint aLength) {

	TUint *p=aData;

	TUint i=0;

	char line[256];

	char *cp=(char*)aData;

	TUint j=0;

	memset(line,' ',sizeof(line));

	while (i<aLength) {

		TUint ccount=0;

		char* linep=&line[8*5+2];

		*out<< "0x";

		out->width(6);

		out->fill('0');

		*out << i << ":";

		while (i<aLength && ccount<4) {

			*out<< " ";

			out->width(8);

			out->fill('0');

			*out << *p++;

			i+=4;

			ccount++;

			for (j=0; j<4; j++) {

				char c=*cp++;

				if (c<32) {

					c = '.';

					}

				*linep++ = c;

				}

			}

		*linep = '\0';

		*out << line+(ccount*5) << endl;

		}

	}

/** 

Function to extract specified file from a given image. 

@internalComponent

@released

@param aOffset - starting offset of the file in the image.

@param aSize - size of the file in the image.

@param aFileName - name of the file.

@param aPath - full path of the file inside image.

@param aFilePath - path where file has to be extracted.

*/

void ImageReader::ExtractFile(TUint aOffset,TInt aSize,const char* aFileName,const char* aPath,const char* aFilePath,const char* aData) {

	// concatenate path where specified file needs to be extracted with

	// path where file is located in the image.

	string fullPath( aFilePath );

	if(*aPath != SLASH_CHAR1 && *aPath != SLASH_CHAR2){

		char ch = aFilePath[fullPath.length() - 1];

		if(ch != SLASH_CHAR1 && ch != SLASH_CHAR2)

			fullPath += SLASH_CHAR1 ;		

	}

	int startImagePath = (int)fullPath.length();

	fullPath += aPath ;	 

	// create specified directory where file needs to be extracted. 

	// to lower

	char* data = const_cast<char*>(fullPath.data() + startImagePath);

	for(; *data != 0 ; data++){

		if(*data >= 'A' && *data <= 'Z'){

			*data |= 0x20 ;

		}

	}

	CreateSpecifiedDir(fullPath);

	data -- ;

	if(*data != SLASH_CHAR1)

		fullPath += SLASH_CHAR1 ; 

	// concatenate path information with the filename	

	fullPath +=  aFileName ;

	// create an output stream to extract the specified file.  

	ofstream outfile (fullPath.c_str(), ios_base::out | ios_base::binary);

	// create an input stream by opening the specified image file.

	ifstream infile(ImageReader::iImgFileName.c_str(),ios_base::in|ios_base::binary);

	//declare a buffer to store the data.

	char* buffer = new char[aSize];

	if(aData != NULL){

		memcpy(buffer, aData + aOffset, aSize);

	}

	else if(infile.is_open()) {

		// place the get pointer for the current input stream to offset bytes away from origin.

		infile.seekg(aOffset,ios_base::beg);

		//read number of bytes specified by the variable size 

		//from the stream and place it on to buffer.

		infile.read(buffer,aSize);

		//close the input stream after reading.

		infile.close();

	}

	else 	{

		throw ImageReaderException(ImageReader::iImgFileName.c_str(), "Failed to open the image file");

	}

	if(outfile.is_open()) {

		//writes number of bytes specified by the variable size 

		//from buffer to the current output stream.

		outfile.write(buffer,aSize);

		//close the output stream after writing.

		outfile.close();

	}

	else {

		throw ImageReaderException(aFileName, "Failed to extract the file");

	}

	//delete the buffer.

	delete[] buffer;

}

/** 

Function to create a given directory. 

@internalComponent

@released

@param aSrcPath - path of the directory that needs to be created. 

*/

void ImageReader::CreateSpecifiedDir(const string& aSrcPath) {	 

	 char* currWorkingDir = new char[PATH_MAX];

	int len = aSrcPath.length() ;

	const char* origPath = aSrcPath.c_str();	 

	char* path = new char[len + 2]; 

	memcpy(path,origPath,len);

	if(path[len - 1] != SLASH_CHAR1 && path[len - 1] != SLASH_CHAR2){

		path[len] = SLASH_CHAR1 ;

		len ++ ;

	}

	path[len] = 0; 

	char* start = path;

	char* end  = path + len ;

	char errMsg[400]  ;

	*errMsg = 0;

	char* dirEnd ;

	// get the current working directory and store in buffer.

	if( getcwd(currWorkingDir,PATH_MAX) == NULL ) {		 

		// throw an exception if unable to get current working directory information.

		snprintf(errMsg,400,"Failed to get the current working directory") ;

		goto L_EXIT;

	}

#ifdef WIN32

//check dir 

	if(isalpha(start[0]) && start[1] == ':'){

		char ch = start[3] ;

		start[3] = 0;

		if(chdir(start)) {

			snprintf(errMsg, 400 ,"Failed to change to the directory \"%s\".",path);

			goto L_EXIT;

		}

		start[3] = ch ;

		start += 3 ;		 

	}

	else if(*start == SLASH_CHAR1 || *start == SLASH_CHAR2){

		if(chdir("\\")){

			snprintf(errMsg, 400 ,"Failed to change to the directory \"\\\".");

			goto L_EXIT;

		}

		start ++ ;

	}

#else

	if(*start == SLASH_CHAR1 || *start == SLASH_CHAR2){

		if(chdir("/")) {

			snprintf(errMsg, 400 ,"Failed to change to the directory \"/\".");

			goto L_EXIT;

		}

		start ++ ;

	}	

#endif

	dirEnd = start ;

	while( start < end ) {		

		while(*dirEnd != SLASH_CHAR1 && *dirEnd != SLASH_CHAR2)

			dirEnd ++ ;

		*dirEnd =  0 ;

		if(!exists(start)) {  

			MKDIR(start);

		}   

		if(chdir(start)){

			snprintf(errMsg, 400 ,"Failed to change to the directory \"%s\".",path);

			goto L_EXIT;

		}

		*dirEnd = SLASH_CHAR1;

		start = dirEnd + 1;

		dirEnd = start ;		 

	} 

L_EXIT:

	chdir(currWorkingDir);

	delete[] currWorkingDir;

	delete [] path;

	if(*errMsg)

	 throw ImageReaderException(ImageReader::iImgFileName.c_str(), errMsg); 

}

/** 

Function to insert a given string with a delimiter.

@internalComponent

@released

@param aSrcStr - string to be modified.

@param aDelimiter - string to be checked.

@param aAppStr - string to be inserted with the delimiter.

*/

void ImageReader::FindAndInsertString(string& aSrcStr,string& aDelimiter,string& aAppStr) {

	string::size_type loc = 0;

	string::size_type pos =0;

	while(( pos = aSrcStr.find( aDelimiter, loc ) ) != ( string::npos ) ) {

		if( pos != string::npos ) {

			aSrcStr.insert(pos,aAppStr);

			loc = pos + aAppStr.length() + 1;

		}

	}

}

/** 

Function to replace a delimiter with a given string.

@internalComponent

@released

@param aSrcStr - string to be modified.

@param aDelimiter - string to be checked.

@param aReplStr - string to be replaced with the delimiter.

*/

void ImageReader::FindAndReplaceString( string& aSrcStr, string& aDelimiter, string& aReplStr ) {

	string::size_type loc = 0;

	string::size_type pos =0;

	while(( pos = aSrcStr.find( aDelimiter,loc) ) != ( string::npos ) ) {

		if( pos != string::npos ) {

			aSrcStr.replace( pos, aReplStr.length(),aReplStr );

			loc = pos + aReplStr.length() + 1;

		}

	}

}

/** 

Function to extract individual or a subset of file.

@internalComponent

@released

@param aData - ROM/ROFS image buffer pointer.

*/

void ImageReader::ExtractFileSet(const char* aData) {

	FILEINFOMAP fileInfoMap; 

	TUint extfileCount = 0, noWcardFlag = 0 ;

	//Get the filelist map

	GetFileInfo(fileInfoMap);

	//Check for wildcards

	const char* patternStr = iPattern.c_str();

	TInt dp = iPattern.length() - 1;

	while(dp >= 0){

		if(patternStr[dp] == SLASH_CHAR1 || patternStr[dp] == SLASH_CHAR2)

			break ;

		dp -- ;

	} 

	size_t pos = iPattern.find_first_of("*?",dp + 1);

	if(pos == string::npos) 

		noWcardFlag = 1; 

	//Process the map

	if(fileInfoMap.size() > 0) {

		FILEINFOMAP::iterator begin = fileInfoMap.begin();

		FILEINFOMAP::iterator end = fileInfoMap.end();

		// Replace all backslashes with forward slashes

		string pat(iPattern);

		for(size_t n = 0 ; n < iPattern.length(); n++){

			if(patternStr[n] == SLASH_CHAR2)

				pat[n] = SLASH_CHAR1 ;

		}

		// Insert root directory at the beginning if it is not there

		pos = pat.find_first_not_of(" ", 0);

		if(pos != string::npos) {

			if(pat.at(pos) != SLASH_CHAR1)

				pat.insert(pos, 1,SLASH_CHAR1);

		}

		// Assign CWD for destination path if it is empty

		if(ImageReader::iZdrivePath.empty())

			ImageReader::iZdrivePath.assign(".");

		while(begin != end) {

			string fileName((*begin).first);

			PFILEINFO pInfo = (*begin).second;

			// First match

			int status = FileNameMatch(pat, fileName, (iDisplayOptions & RECURSIVE_FLAG));

			// If no match

			if((!status) && noWcardFlag) {

				string newPattern(pat);

				// Add * at the end

				if(newPattern.at(pat.length()-1) != SLASH_CHAR1) {

					newPattern += SLASH_CHAR1;

				}

				newPattern += "*";

				status = FileNameMatch(newPattern, fileName, (iDisplayOptions & RECURSIVE_FLAG));

				// If it matches update the pattern and reset wildcard flag

				if(status) {

					pat = newPattern;

					noWcardFlag = 0;

				}

			}

			if(status) {

				// Extract the file

				// Separarate the path and file name

				int slash_pos = fileName.rfind(SLASH_CHAR1);

				string fullPath = fileName.substr(0,slash_pos );

				string file = fileName.substr(slash_pos + 1, fileName.length());

				//FindAndReplaceString(fullPath, dirSep, backSlash);

				char* fpStr = const_cast<char*>(fullPath.c_str());

				for(size_t m = 0 ; m < fullPath.length() ; m++){

					if(fpStr[m] == SLASH_CHAR2)

						fpStr[m] = SLASH_CHAR1 ;

				}

				// Extract only those files exists in the image

				if(pInfo->iSize && pInfo->iOffset) {

					ExtractFile(pInfo->iOffset, pInfo->iSize, file.c_str(), fullPath.c_str() , 

						ImageReader::iZdrivePath.c_str(), aData);

					extfileCount++;

				}

			}

			if(pInfo)

				delete pInfo;

			++begin;

		}

		fileInfoMap.clear();

	}

	// Throw error if the extracted file count is zero

	if(!extfileCount) {

		throw ImageReaderException(ImageReader::iImgFileName.c_str(), "No matching files found for the given pattern");

	}

}

/** 

To match the given file name aganist the given pattern with wildcards

@internalComponent

@released

@param aPattern - input filename pattern.

@param aFileName - input file name.

@param aRecursiveFlag - recursive search flag.

*/

int ImageReader::FileNameMatch(const string& aPattern, const string&  aFileName, int aRecursiveFlag) {

	const char *InputString = aFileName.c_str();

	const char *Pattern = aPattern.c_str();

	const char *CurrPattern = 0, *CurrString = 0;

	// If the input is empty then return false

	if((aPattern.empty()) || (!InputString))

		return 0;

	// First candidate match

	// Step 1: Look for the exact matches between the input pattern and the given file-name till 

	//         the first occurrence of wildcard character (*). This should also skip a character 

	//         from matching for the occurrence of wildcard character(?) in the pattern.

	while ((*InputString) && (*Pattern != '*'))  {

		if ((toupper(*Pattern) != toupper(*InputString)) && (*Pattern != '?'))  {

			return 0;

		}

		Pattern++;

		InputString++;

	}

	// Wildcard match

	// Step 2: Now the input string (file-name) should be checked against the wildcard characters (* and ?). 

	//         Skip the input string if the pattern points to wildcard character(*). Do the exact match for 

	//         other characters in the patterns except the wildcard character(?). The path-separator should be 

	//         considered as non-match for non-recursive option.

	while (*InputString) {

		if ((*Pattern == '*')) {

			if (!*++Pattern) {

				// If recursive flag is set then this case matches for any character of the input string

				// from the current position

				if(aRecursiveFlag)

					return 1;

			}

			// Update the current pattern and the current inputstring

			CurrPattern = Pattern;

			CurrString = InputString+1;			

		} 

		else if ((toupper(*Pattern) == toupper(*InputString)) || (*Pattern == '?')) {

			// Exact match for the path separator

			// So recursively call the function to look for the exact path level match

			if(*Pattern == SLASH_CHAR1)

				return FileNameMatch(Pattern, InputString, aRecursiveFlag);

			// Exact match so increment both

			Pattern++;

			InputString++;

		} 

		else if ((*InputString == SLASH_CHAR1) && (!aRecursiveFlag)) {

			// Inputstring points to path separator and it is not expected here for non-recursive case

			return 0;

		}

		else {

			// Default case where it matches for the wildcard character *

			Pattern = CurrPattern;

			InputString = CurrString++;

		}

	}

	// Leave any more stars in the pattern

	while (*Pattern == '*')  

		Pattern++; 

	// Return the status

	return !*Pattern;

}