public byte[] ReadAllBytes(string filePath)
{
FileEntry file = null;
foreach (var entry in IndexAria)
{
if (entry is FileEntry fe)
{
if (fe.Name == filePath)
{
file = fe;
}
}
}
if (file == null)
{
return(null);
}
var buf = new List <byte>();
BlockBuffer.Offset = file.StartingBlock * BlockDevice.BlockSize;
for (int i = 0; i < file.Length; i++)
{
buf.Add(BlockBuffer.ReadByte());
}
return(buf.ToArray());
}
private void WriteIndexAria()
{
var endOfVolume = BlockDevice.BlockSize * BlockDevice.TotalBlocks;
var offset = 1;
foreach (var structure in IndexAria)
{
BlockBuffer.Offset = endOfVolume - offset * 64;
structure.Write(BlockBuffer);
if (structure.Continuations > 0)
{
offset += (structure.Name.Length / 64) + 1;
BlockBuffer.Offset = endOfVolume - offset * 64;
BlockBuffer.WriteString(structure.Name);
}
offset++;
}
}
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++;
}
}
public SimpleFS(IBlockDevice blockDevice)
{
BlockDevice = blockDevice;
BlockBuffer = new BlockBuffer(BlockDevice);
}
public abstract void Read(BlockBuffer bb);
public abstract void Write(BlockBuffer bb);
