public NbtNode Read(int x, int z)
{
lock (this)
{
MoveToHeaderPosition(x, z);
var index = _filePointer.ReadInt32();
if (index == 0) return null; // Not yet generated
int usedSectors = index & 0xFF;
int sectorOffset = index >> 8;
_filePointer.Seek(sectorOffset*4096, SeekOrigin.Begin);
int chunkLength = _filePointer.ReadInt32();
if (chunkLength == -1) return null; // Not yet generated
byte compressionMode = _filePointer.ReadByte();
MemoryStream decompressStream;
if (compressionMode == 0)
{
}
if (compressionMode == 1)
{
byte[] buffer = new byte[chunkLength];
_filePointer.Read(buffer, 0, buffer.Length);
buffer = Decompress(buffer);
decompressStream = new MemoryStream(buffer);
}
else
{
byte[] buffer = new byte[chunkLength];
_filePointer.Read(buffer, 0, buffer.Length);
var def = new Inflater();
decompressStream = new MemoryStream();
def.setInput(buffer);
int i = 0;
buffer = new byte[1024*1024];
try
{
while (!def.finished() && (i = def.inflate(buffer)) > 0)
{
decompressStream.Write(buffer, 0, i);
}
}
catch
{
return null;
}
decompressStream.Seek(0, SeekOrigin.Begin);
}
return new NbtReader().ReadNbtFile(decompressStream);
}
}
