| public SetUInt ( uint offset, uint value ) : void | ||
| offset | uint | |
| value | uint | |
| return | void | |
public bool Format()
{
if (!diskDevice.CanWrite)
{
return(false);
}
BinaryFormat masterboot = new BinaryFormat(new byte[512]);
masterboot.SetUInt(MasterBootRecord.DiskSignature, diskSignature);
masterboot.SetUShort(MasterBootRecord.MBRSignature, MasterBootConstants.MBRSignature);
if (code != null)
{
for (uint index = 0; index < MasterBootConstants.CodeAreaSize; index++)
{
masterboot.SetByte(index, code[index]);
}
}
//TODO: write partitions
diskDevice.WriteBlock(0, 1, masterboot.Data);
return(true);
}
public bool Format ()
{
if (!diskDevice.CanWrite)
return false;
BinaryFormat masterboot = new BinaryFormat (new byte[512]);
masterboot.SetUInt (MasterBootRecord.DiskSignature, diskSignature);
masterboot.SetUShort (MasterBootRecord.MBRSignature, MasterBootConstants.MBRSignature);
if (code != null)
for (uint index = 0; index < MasterBootConstants.CodeAreaSize; index++)
masterboot.SetByte (index, code[index]);
//TODO: write partitions
diskDevice.WriteBlock (0, 1, masterboot.Data);
return true;
}
protected bool SetClusterEntryValue (uint cluster, uint nextcluster)
{
uint fatOffset = 0;
if (fatType == FATType.FAT12)
fatOffset = (cluster + (cluster / 2));
else if (fatType == FATType.FAT16)
fatOffset = cluster * 2;
else //if (type == FatType.FAT32)
fatOffset = cluster * 4;
uint sector = fatStart + (fatOffset / bytesPerSector);
uint sectorOffset = fatOffset % bytesPerSector;
uint nbrSectors = 1;
if ((fatType == FATType.FAT12) && (sectorOffset == bytesPerSector - 1))
nbrSectors = 2;
BinaryFormat fat = new BinaryFormat (partition.ReadBlock (sector, nbrSectors));
if (fatType == FATType.FAT12) {
uint clustervalue = fat.GetUShort (sectorOffset);
if (cluster % 2 == 1)
clustervalue = ((clustervalue & 0xF) | (nextcluster << 4));
else
clustervalue = ((clustervalue & 0xf000) | (nextcluster));
fat.SetUShort (sectorOffset, (ushort)clustervalue);
}
else if (fatType == FATType.FAT16)
fat.SetUShort (sectorOffset, (ushort)nextcluster);
else //if (type == FatType.FAT32)
fat.SetUInt (sectorOffset, nextcluster);
partition.WriteBlock (sector, nbrSectors, fat.Data);
return true;
}
public bool Format (FATSettings fatSettings)
{
if (!partition.CanWrite)
return false;
this.fatType = fatSettings.FatType;
bytesPerSector = 512;
totalSectors = partition.BlockCount;
sectorsPerCluster = GetSectorsPerClusterByTotalSectors (fatType, totalSectors);
nbrFats = 2;
if (fatType == FATType.FAT32) {
reservedSectors = 32;
rootEntries = 0;
}
else {
reservedSectors = 1;
rootEntries = 512;
}
rootDirSectors = (((rootEntries * 32) + (bytesPerSector - 1)) / bytesPerSector);
fatStart = reservedSectors;
uint val1 = totalSectors - (reservedSectors + rootDirSectors);
uint val2 = (uint)((256 * sectorsPerCluster) + nbrFats);
if (fatType == FATType.FAT32)
val2 = val2 / 2;
uint sectorsperfat = (val1 + (val2 - 1)) / val2;
BinaryFormat bootSector = new BinaryFormat (512);
bootSector.SetUInt (BootSector.JumpInstruction, 0);
bootSector.SetString (BootSector.EOMName, "MSWIN4.1");
bootSector.SetUShort (BootSector.BytesPerSector, (ushort)bytesPerSector);
bootSector.SetByte (BootSector.SectorsPerCluster, (byte)sectorsPerCluster);
bootSector.SetUShort (BootSector.ReservedSectors, (ushort)reservedSectors);
bootSector.SetByte (BootSector.FatAllocationTables, nbrFats);
bootSector.SetUShort (BootSector.MaxRootDirEntries, (ushort)rootEntries);
if (totalSectors > 0xFFFF) {
bootSector.SetUShort (BootSector.TotalSectors, 0);
bootSector.SetUInt (BootSector.FAT32_TotalSectors, totalClusters);
}
else {
bootSector.SetUShort (BootSector.TotalSectors, (ushort)totalSectors);
bootSector.SetUInt (BootSector.FAT32_TotalSectors, 0);
}
bootSector.SetByte (BootSector.MediaDescriptor, 0xF8);
if (fatType == FATType.FAT32)
bootSector.SetUShort (BootSector.SectorsPerFAT, 0);
else
bootSector.SetUShort (BootSector.SectorsPerFAT, (ushort)sectorsperfat);
bootSector.SetUShort (BootSector.SectorsPerTrack, 0); ////FIXME
bootSector.SetUInt (BootSector.HiddenSectors, 0);
if (fatType != FATType.FAT32) {
bootSector.SetByte (BootSector.PhysicalDriveNbr, 0x80);
bootSector.SetByte (BootSector.ReservedCurrentHead, 0);
bootSector.SetByte (BootSector.ExtendedBootSignature, 0x29);
bootSector.SetBytes (BootSector.IDSerialNumber, fatSettings.SerialID, 0, (uint)(fatSettings.SerialID.Length <= 4 ? fatSettings.SerialID.Length : 4));
bootSector.SetString (BootSector.VolumeLabel, " "); // 12 blank spaces
bootSector.SetString (BootSector.VolumeLabel, fatSettings.VolumeLabel, (uint)(fatSettings.VolumeLabel.Length <= 12 ? fatSettings.VolumeLabel.Length : 12));
bootSector.SetUShort (BootSector.BootSectorSignature, 0x55AA);
//BootSector.OSBootCode // TODO
}
if (fatType == FATType.FAT12)
bootSector.SetString (BootSector.FATType, "FAT12 ");
else if (fatType == FATType.FAT16)
bootSector.SetString (BootSector.FATType, "FAT16 ");
else // if (type == FatType.FAT32)
bootSector.SetString (BootSector.FATType, "FAT32 ");
if (fatType == FATType.FAT32) {
bootSector.SetUInt (BootSector.FAT32_SectorPerFAT, sectorsperfat);
bootSector.SetByte (BootSector.FAT32_Flags, 0);
bootSector.SetUShort (BootSector.FAT32_Version, 0);
bootSector.SetUInt (BootSector.FAT32_ClusterNumberOfRoot, 2);
bootSector.SetUShort (BootSector.FAT32_SectorFSInformation, 1);
bootSector.SetUShort (BootSector.FAT32_SecondBootSector, 6);
//FAT32_Reserved1
bootSector.SetByte (BootSector.FAT32_PhysicalDriveNbr, 0x80);
bootSector.SetByte (BootSector.FAT32_Reserved2, 0);
bootSector.SetByte (BootSector.FAT32_ExtendedBootSignature, 0x29);
bootSector.SetBytes (BootSector.FAT32_IDSerialNumber, fatSettings.SerialID, 0, (uint)(fatSettings.SerialID.Length <= 4 ? fatSettings.SerialID.Length : 4));
bootSector.SetString (BootSector.FAT32_VolumeLabel, " "); // 12 blank spaces
bootSector.SetString (BootSector.FAT32_VolumeLabel, fatSettings.VolumeLabel, (uint)(fatSettings.VolumeLabel.Length <= 12 ? fatSettings.VolumeLabel.Length : 12));
bootSector.SetString (BootSector.FAT32_FATType, "FAT32 ");
//BootSector.OSBootCode // TODO
}
// Write Boot Sector
partition.WriteBlock (0, 1, bootSector.Data);
// Write backup Boot Sector
if (fatType == FATType.FAT32) {
partition.WriteBlock (0, 1, bootSector.Data); // FIXME: wrong block #
}
// create FSInfo Structure
if (fatType == FATType.FAT32) {
BinaryFormat infoSector = new BinaryFormat (512);
infoSector.SetUInt (FSInfo.FSI_LeadSignature, 0x41615252);
//FSInfo.FSI_Reserved1
infoSector.SetUInt (FSInfo.FSI_StructureSigature, 0x61417272);
infoSector.SetUInt (FSInfo.FSI_FreeCount, 0xFFFFFFFF);
infoSector.SetUInt (FSInfo.FSI_NextFree, 0xFFFFFFFF);
//FSInfo.FSI_Reserved2
bootSector.SetUInt (FSInfo.FSI_TrailSignature, 0xAA550000);
partition.WriteBlock (1, 1, infoSector.Data);
partition.WriteBlock (7, 1, infoSector.Data);
// create 2nd sector
BinaryFormat secondSector = new BinaryFormat (512);
secondSector.SetUInt ((ushort)FSInfo.FSI_TrailSignature2, 0xAA55);
partition.WriteBlock (2, 1, secondSector.Data);
partition.WriteBlock (8, 1, secondSector.Data);
}
// create fats
/// TODO: incomplete
BinaryFormat emptyFat = new BinaryFormat (512);
// clear primary & secondary fats entries
for (uint i = fatStart; i < fatStart + 1; i++) { //FIXME
partition.WriteBlock (i, 1, emptyFat.Data);
}
// first block is special
BinaryFormat firstFat = new BinaryFormat (512);
// TODO: incomplete
partition.WriteBlock (reservedSectors, 1, emptyFat.Data);
return ReadBootSector ();
}
