public void Load()
{
lock (_chunkCache)
{
string filePath = FilePath;
if (!File.Exists(filePath))
{
// Welp, nothing to load.
IsLoaded = true;
return;
}
using (FileStream regionFile = File.OpenRead(filePath))
{
AnvilRegionHeader header = LoadRegionHeader(regionFile);
RegionHeader = header;
//File.WriteAllLines(FilePath + ".header", header.GetAllChunkData().Select(h => string.Format("{0,-10}\t=>\t{1,-10}\t{2,-10}\t{3,-10}", h.ChunkCoordinates, h.LocationOffset, h.SectorCount, h.UpdatedTimestamp)).ToArray());
foreach (AnvilRegionHeaderChunkData data in header.GetAllChunkData())
{
// Attempt to load NbtFile for each chunk.
if (!data.ChunkExists)
{
continue;
}
regionFile.Seek(data.LocationOffset, SeekOrigin.Begin);
var lengthBuffer = new byte[4];
regionFile.Read(lengthBuffer, 0, 4);
Array.Reverse(lengthBuffer);
int nbtDataLength = BitConverter.ToInt32(lengthBuffer, 0) - 1;
int compressionMode = regionFile.ReadByte();
NbtCompression compression = compressionMode == 2
? NbtCompression.ZLib
: (compressionMode == 1 ? NbtCompression.GZip : NbtCompression.None);
var nbtDataBuffer = new byte[nbtDataLength];
regionFile.Read(nbtDataBuffer, 0, nbtDataLength);
//Debug.WriteLine($"({data.ChunkCoordinates.X}, {data.ChunkCoordinates.Z}) Offset: {data.LocationOffset}, Header Length: {data.SectorCount}, NbtDataLength: {nbtDataLength}");
var nbtFile = new NbtFile();
nbtFile.LoadFromBuffer(nbtDataBuffer, 0, nbtDataLength, compression);
//File.WriteAllText(Path.Combine(Provider.BasePath, "region", FileName + $"_{data.ChunkCoordinates.X}-{data.ChunkCoordinates.Z}.txt"), nbtFile.ToString());
//Debug.WriteLine(
// $"Region: ({X},{Z}), Chunk({data.ChunkCoordinates.X}, {data.ChunkCoordinates.Z}): NbtDataLength: {nbtDataLength}");
_containingChunks.TryAdd(data.ChunkCoordinates, nbtFile);
}
}
IsLoaded = true;
}
}
private AnvilRegionHeader LoadRegionHeader(FileStream regionFile)
{
var header = new AnvilRegionHeader();
var completeUpdatedTimeBuffer = new byte[4096];
regionFile.Seek(4096, SeekOrigin.Begin);
regionFile.Read(completeUpdatedTimeBuffer, 0, 4096);
regionFile.Seek(0, SeekOrigin.Begin);
//int read = 0;
int baseX = X * Width;
int baseZ = Z * Width;
// Load Chunk Locations
for (var zi = 0; zi < Width; zi++)
{
for (var xi = 0; xi < Width; xi++)
{
int x = baseX + xi;
int z = baseZ + zi;
int index = (xi + zi * Width) * 4;
var coords = new ChunkCoordinates(x, z);
var chunkLocationBuffer = new byte[4];
regionFile.Read(chunkLocationBuffer, 0, 3);
Array.Reverse(chunkLocationBuffer);
int offset = BitConverter.ToInt32(chunkLocationBuffer, 0) << 4;
int length = regionFile.ReadByte() << 12;
var updatedTimeBuffer = new byte[4];
Array.Copy(completeUpdatedTimeBuffer, index, updatedTimeBuffer, 0, 4);
Array.Reverse(updatedTimeBuffer);
int updatedTime = BitConverter.ToInt32(updatedTimeBuffer, 0);
//Debug.WriteLine($"Header ({x},{z}) Offset: {offset} Length: {length} UpdatedTime: {updatedTime}");
var chunkHeader = new AnvilRegionHeaderChunkData(coords, offset, length, updatedTime);
header.SetChunkData(coords, chunkHeader);
}
}
return(header);
}
