public void Format()
{
SuperBlock = new SuperBlock
{
BlockSize = 2, //this should be calculated
TotalReservedBlocks = 20,
TotalBlocks = BlockDevice.TotalBlocks,
SizeOfIndexInBytes = 0,
Checksum = 0,
DataSizeInBlocks = 0,
TimeStamp = 0
};
SuperBlock.SizeOfIndexInBytes = 64 * 2;
SuperBlock.Write(BlockBuffer);
var volumeIdentifier = new VolumeIdentifier
{
TimeStamp = 0,
VolumeName = "SFS Volume"
};
var offset = 1;
BlockBuffer.Offset = BlockDevice.BlockSize * BlockDevice.TotalBlocks - offset * 64;
volumeIdentifier.Write(BlockBuffer);
offset++;
BlockBuffer.Offset = BlockDevice.BlockSize * BlockDevice.TotalBlocks - offset * 64;
var marker = new StartingMarkerEntry();
marker.Write(BlockBuffer);
ReadIndexAria();
}
private void ReadIndexAria()
{
IndexAria.Clear();
var endOfVolume = BlockDevice.BlockSize * BlockDevice.TotalBlocks;
var offset = 1;
while (endOfVolume > offset * 64)
{
BlockBuffer.Offset = endOfVolume - offset * 64;
var id = BlockBuffer.ReadByte();
BlockBuffer.Offset--;
switch (id)
{
case 0x01: // VolumeIdentifier
{
var x = new VolumeIdentifier();
x.Read(BlockBuffer);
IndexAria.Add(x);
}
break;
case 0x02: // Starting Marker Entry
{
var x = new StartingMarkerEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
return;
}
case 0x10: // Unused Entry
{
var x = new UnusedEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
}
break;
case 0x11: // Directory Entry
{
var x = new DirectoryEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
case 0x12: // File Entry
{
var x = new FileEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
case 0x18: // Unusable Entry
{
var x = new UnusableEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
}
break;
case 0x19: // Deleted Directory Entry
{
var x = new DeletedDirectoryEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
case 0x1A: // Deleted File Entry
{
var x = new DeletedFileEntry();
x.Read(BlockBuffer);
IndexAria.Add(x);
if (x.Continuations > 0)
{
offset += x.Continuations + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
x.Name = BlockBuffer.ReadString();
}
}
break;
}
offset++;
}
}
