/*

* Copyright (c) 2006-2009 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: 

* Directory class exports the functions required to construct either 

* single entry (constructor) or to construct directory structure.

* Also initializes the date and time attributes for all newly created

* entries.

* @internalComponent

* @released

*

*/

#include "errorhandler.h"

#include "directory.h"

#include "constants.h"

#include "utf16string.h"

/**

Constructor:

1. To Initialize the date and time variable

2. Also to initialize other variable's

@internalComponent

@released

@param aEntryName - the entry name

*/

FILESYSTEM_API CDirectory::CDirectory(const char* aEntryName,CDirectory* aParent):

						iEntryName(aEntryName),

						iAttribute(0),

						iNtReserved(KNTReserverdByte),

						iCreationTimeMsecs(KCreateTimeInMsecs),

						iClusterNumberHi(0),

						iClusterNumberLow(0),

						iFileSize (0), 

						iParent(aParent) 

{

	InitializeTime();

	memset(iShortName,0x20,11);

	iShortName[11] = 0 ; 

	size_t length = iEntryName.length();

	if(0 == length)

	    return ;

	if(0 == strcmp(aEntryName,".")){

        iShortName[0] = '.' ;

        return ;

	}

	if(0 == strcmp(aEntryName,"..")){

        iShortName[0] = '.' ;

        iShortName[1] = '.' ;

        return ;

    }

    size_t lenOfSuffix = 0 ;

    size_t dotPos = iEntryName.rfind('.',length);

    size_t lenOfPrefix ;

    if(dotPos != string::npos) {

        lenOfSuffix = length - dotPos - 1;

        lenOfPrefix = dotPos ;

    }

    else 

        lenOfPrefix = length ;

    size_t p  ;

    char c ;

    bool flag = false ;

    for( p = 0 ; p < lenOfPrefix ; p ++) {

        c = aEntryName[p];

        if(c == 0x22 || c == 0x2A || c == 0x2B || c == 0x2C || c == 0x2E || c == 0x2F || \

           c == 0x3A || c == 0x3B || c == 0x3C || c == 0x3D || c == 0x3E || c == 0x3 || \

           c == 0x5B || c == 0x5C || c == 0x5D || c == 0x7C )  { // illegal characters ;

            flag = true ;

            break ;

        }  

    }

    lenOfPrefix = p ;

    if(lenOfPrefix > 8){

        flag = true ;

    }    

    if(flag){

        size_t len =  (6 <= p) ? 6 : p;

        memcpy(iShortName,aEntryName,len);

        iShortName[len] = '~';

        iShortName[len + 1] = '1' ;

		if(lenOfSuffix > 0){

			memcpy(&iShortName[8],&aEntryName[dotPos + 1], ((3 <= lenOfSuffix) ? 3 : lenOfSuffix));

		}

		for(p = 0 ; p < 11 ; p++){

			if(iShortName[p] >= 'a' && iShortName[p] <= 'z')

				iShortName[p] = iShortName[p] + 'A' - 'a' ;

		}

		if(iParent)

			iParent->MakeUniqueShortName(iShortName,len);

    }

    else {

        memcpy(iShortName,aEntryName,lenOfPrefix);

		if(lenOfSuffix > 0){

			memcpy(&iShortName[8],&aEntryName[dotPos + 1], ((3 <= lenOfSuffix) ? 3 : lenOfSuffix));

		}

		for(p = 0 ; p < 11 ; p++){

			if(iShortName[p] >= 'a' && iShortName[p] <= 'z')

				iShortName[p] = iShortName[p] + 'A' - 'a' ;

		}

    }

}

void CDirectory::MakeUniqueShortName(unsigned char* rShortName,size_t aWavPos) const { 

	list<CDirectory*>::const_iterator i = iDirectoryList.begin();

	unsigned char nIndex = 1 ;

	while(i != iDirectoryList.end()){

		CDirectory* dir = (CDirectory*)(*i); 

		if(0 == memcmp(rShortName,dir->iShortName,aWavPos + 1) &&

			0 == memcmp(&rShortName[8],&(dir->iShortName[8]),3)) {

			nIndex ++ ;

		}

		i++ ;

	} 

	if(nIndex < 10)

		rShortName[aWavPos + 1] =  ('0' + nIndex) ;

	else if( nIndex < 36) 

		rShortName[aWavPos + 1] =  ('A' + nIndex - 10) ;

	else {

		nIndex = 10 ;

		rShortName[aWavPos-1] = '~';

		i = iDirectoryList.begin();

		while(i != iDirectoryList.end()){

			CDirectory* dir = (CDirectory*)(*i);

			if(0 == memcmp(rShortName,dir->iShortName,aWavPos) &&

				0 == memcmp(&rShortName[8],&(dir->iShortName[8]),3))

				nIndex ++ ;

			i++ ;

		}

		sprintf((char*)(&rShortName[aWavPos]),"%u",(unsigned int)(nIndex));

		rShortName[aWavPos + 2] = 0x20;

	}

}

/**

Destructor: 

1. To delete all the entries available in the form of directory structure

2. Also to delete the current entry

@internalComponent

@released 

*/

FILESYSTEM_API CDirectory::~CDirectory()

{

	while(iDirectoryList.size() > 0)

	{

		delete iDirectoryList.front();

		iDirectoryList.pop_front();

	}

}

/**

Function to initialize the time attributes of an entry

@internalComponent

@released 

*/

void CDirectory::InitializeTime()

{

	time_t rawtime;

	time ( &rawtime );

	iDateAndTime = localtime ( &rawtime );

	iDate.iCurrentDate.Day = iDateAndTime->tm_mday;

	iDate.iCurrentDate.Month = iDateAndTime->tm_mon+1; //As per FAT spec

	iDate.iCurrentDate.Year = iDateAndTime->tm_year - 80;//As per FAT spec

	iTime.iCurrentTime.Hour = iDateAndTime->tm_hour;

	iTime.iCurrentTime.Minute = iDateAndTime->tm_min;

	iTime.iCurrentTime.Seconds = iDateAndTime->tm_sec / 2;//As per FAT spec

	iCreationDate = iDate.iImageDate;

	iCreatedTime = iTime.iImageTime;

	iLastAccessDate = iDate.iImageDate;

	iLastWriteDate = iDate.iImageDate;

	iLastWriteTime = iTime.iImageTime;

}

/**

Function to initialize the entry name

@internalComponent

@released

@param aEntryName - entry name need to be initialized

*/

FILESYSTEM_API void CDirectory::SetEntryName(string aEntryName)

{

	iEntryName = aEntryName;

}

/**

Function to return the entry name

@internalComponent

@released

@return iEntryName - the entry name

*/

FILESYSTEM_API string CDirectory::GetEntryName() const

{

	return iEntryName;

}

/**

Function to initialize the file path

@internalComponent

@released

@param aFilePath - where the current entry contents actually stored

*/

FILESYSTEM_API void CDirectory::SetFilePath(char* aFilePath)

{

	iFilePath.assign(aFilePath);

}

/**

Function to return the file path

@internalComponent

@released

@return iFilePath - the file path

*/

FILESYSTEM_API string CDirectory::GetFilePath() const

{

	return iFilePath;

}

/**

Function to set the entry attribute

@internalComponent

@released

@param aAttribute - entry attribute

*/

FILESYSTEM_API void CDirectory::SetEntryAttribute(char aAttribute)

{

	iAttribute = aAttribute;

}

/**

Function to return the entry attribute

@internalComponent

@released

@return iAttribute - the entry attribute

*/

FILESYSTEM_API char CDirectory::GetEntryAttribute() const

{

	return iAttribute;

}

/**

Function to initialize the file size, this function is called only if the entry is of

type File.

@internalComponent

@released

@param aFileSize - the current entry file size

*/

FILESYSTEM_API void CDirectory::SetFileSize(unsigned int aFileSize)

{

	iFileSize = aFileSize;

}

/**

Function to return the entry file size, this function is called only if the entry is of

type File.

@internalComponent

@released

@return iFileSize - the file size

*/

FILESYSTEM_API unsigned int CDirectory::GetFileSize() const

{

	return iFileSize;

}

/**

Function to check whether this is a file 

@internalComponent

@released 

@return iFileFlag - the File Flag

*/

bool CDirectory::IsFile() const 

{

	return (iAttribute & EAttrDirectory) == 0  ;

}

/**

Function to return the entries Nt Reserved byte

@internalComponent

@released 

@return iNtReserverd - the Nt Reserved byte

*/

char CDirectory::GetNtReservedByte() const

{

	return iNtReserved;

}

/**

Function to return the entry Creation time in milli-seconds.

@internalComponent

@released

@return iCreatedTimeMsecs - created time in Milli-seconds

*/

char CDirectory::GetCreationTimeMsecs() const

{

	return iCreationTimeMsecs;

}

/**

Function to return the entry Created time

@internalComponent

@released

@retun iCreatedTime - created time

*/

unsigned short int CDirectory::GetCreatedTime() const

{

	return iCreatedTime;

}

/**

Function to return the entry Created date

@internalComponent

@released

@return iCreationDate - created date

*/

unsigned short int CDirectory::GetCreationDate() const

{

	return iCreationDate;

}

/**

Function to return the entry last accessed date

@internalComponent

@released

@return iLastAccessDate - last access date

*/

unsigned short int CDirectory::GetLastAccessDate() const

{

	return iLastAccessDate;

}

/**

Function to set high word cluster number

@internalComponent

@released

@param aHiClusterNumber - high word of current cluster number

*/

void CDirectory::SetClusterNumberHi(unsigned short int aHiClusterNumber)

{

	iClusterNumberHi = aHiClusterNumber;

}

/**

Function to return high word cluster number

@internalComponent

@released

@return iClusterNumberHi - high word of cluster number

*/

unsigned short int CDirectory::GetClusterNumberHi() const

{

	return iClusterNumberHi;

}

/**

Function to set low word cluster number

@internalComponent

@released 

@param aLowClusterNumber - low word of current cluster number

*/

void CDirectory::SetClusterNumberLow(unsigned short int aLowClusterNumber)

{

	iClusterNumberLow = aLowClusterNumber;

}

/**

Function to return low word cluster number

@internalComponent

@released 

@return iClusterNumberLow - low word of cluster number

*/

unsigned short int CDirectory::GetClusterNumberLow() const

{

	return iClusterNumberLow;

}

/**

Function to return last write date

@internalComponent

@released 

@return iLastWriteDate - last write date

*/

unsigned short int CDirectory::GetLastWriteDate() const

{

	return iLastWriteDate;

}

/**

Function to return last write time

@internalComponent

@released

@return iLastWriteTime - last write time

*/

unsigned short int CDirectory::GetLastWriteTime() const

{

	return iLastWriteTime;

}

/**

Function to return sub directory/file list

@internalComponent

@released

@return iDirectoryList -  entry list

*/

FILESYSTEM_API EntryList* CDirectory::GetEntryList()

{

	return &iDirectoryList;

}

/**

Function to insert a entry into Directory list. Also this function can be used 

extensively to construct tree form of directory structure.

@internalComponent

@released

@param aEntry - the entry to be inserted

*/

FILESYSTEM_API void CDirectory::InsertIntoEntryList(CDirectory* aEntry)

{

    aEntry->iParent = this ;

	iDirectoryList.push_back(aEntry);

}

FILESYSTEM_API bool CDirectory::GetShortEntry(TShortDirEntry& rEntry) {

    memcpy(rEntry.DIR_Name,iShortName,sizeof(rEntry.DIR_Name)); 

    rEntry.DIR_Attr = iAttribute;

    rEntry.DIR_NTRes = 0 ;

    rEntry.DIR_CrtTimeTenth = 0 ;        

    memcpy(rEntry.DIR_CrtTime,&iCreatedTime,sizeof(rEntry.DIR_CrtTime)); 

    memcpy(rEntry.DIR_CrtDate,&iCreationDate,sizeof(rEntry.DIR_CrtDate));

    memcpy(rEntry.DIR_LstAccDate,&iLastAccessDate,sizeof(rEntry.DIR_LstAccDate));

    memcpy(rEntry.DIR_FstClusHI,&iClusterNumberHi,sizeof(rEntry.DIR_FstClusHI)); 

    memcpy(rEntry.DIR_WrtTime,&iLastWriteTime,sizeof(rEntry.DIR_WrtTime));