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());
}