Release note: Bug 2809 - [Raptor] Intermediate Resource Filenames not unique, rom fails to boot
/*
* 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:
* This class represents the boot sector of a FAT16 image.
* This class is derived from basebootsector class which is constitutes
* the common boot sector fields for FAT16 and FAT32 class.
* @internalComponent
* @released
*
*/
#include "fat16bootsector.h"
/**
Constructor of the fat16 boot sector class
@internalComponent
@released
*/
TFAT16BootSector::TFAT16BootSector()
{
}
/**
Destructor of the fat16 boot sector class
@internalComponent
@released
*/
TFAT16BootSector::~TFAT16BootSector()
{
}
/**
Set the file system type
@internalComponent
@released
*/
void TFAT16BootSector::SetFileSysType()
{
strcpy(reinterpret_cast<char*>(iFileSysType),"FAT16 ");
}
/**
returns the file system type
@return file system type
@internalComponent
@released
*/
unsigned char* TFAT16BootSector::FileSysType()
{
return iFileSysType;
}
/**
Number of entries allowed in the root directory,specific to Fat12/16,
zero for FAT32
@internalComponent
@released
*/
void TFAT16BootSector::SetRootDirEntries()
{
iRootDirEntries = KDefaultRootDirEntries;;
}
/**
Sets the number of reserved sectors on the volume
@internalComponent
@released
*/
void TFAT16BootSector::SetReservedSectors()
{
iReservedSectors = KDefaultFat16ReservedSectors;
}
/**
Computes the sectors per cluster ratio
To refer this mathematical computation, Please see:
Microsoft Extensible Firmware Initiative FAT32 File
System Specification document
@internalComponent
@released
@param aPartitionSize partition size in bytes
*/
void TFAT16BootSector::ComputeSectorsPerCluster(Long64 aPartitionSize)
{
if(aPartitionSize > K1GB)
{
iSectorsPerCluster = K64SectorsPerCluster;
}
else if(aPartitionSize > K512MB)
{
iSectorsPerCluster = K32SectorsPerCluster;
}
else if(aPartitionSize > K256MB)
{
iSectorsPerCluster = K16SectorsPerCluster;
}
else if(aPartitionSize > K128MB)
{
iSectorsPerCluster = K8SectorsPerCluster;
}
else if(aPartitionSize > K16MB)
{
iSectorsPerCluster = K4SectorsPerCluster;
}
else
{
iSectorsPerCluster = K2SectorsPerCluster;
}
}
/**
Sectors used for the Fat table
To refer this mathematical formulae, Please see:
Microsoft Extensible Firmware Initiative FAT32 File System Specification
document
@internalComponent
@released
@param aPartitionSize partition size
*/
void TFAT16BootSector::ComputeFatSectors(Long64 aPartitionSize)
{
int iRootDirSectors = ((iRootDirEntries * 32) + (iBytesPerSector - 1)) / iBytesPerSector;
int Log2OfBytesPerSector = Log2(iBytesPerSector);
unsigned long TotalSectors64 = (unsigned long)(aPartitionSize >> Log2OfBytesPerSector);
unsigned int tmpval1 = TotalSectors64 - (iReservedSectors + iRootDirSectors);
unsigned int tmpval2 =(256 * iSectorsPerCluster) + iNumberOfFats;
unsigned int FatSectors =(tmpval1 + (tmpval2 - 1)) / tmpval2;
iFatSectors = (unsigned short)FatSectors;
iFatSectors32 = 0;
}