public void LoadLocation(Stream stream)
{
byte[] locationBuffer = new byte[4096];
stream.Seek(0, SeekOrigin.Begin);
stream.Read(locationBuffer, 0, locationBuffer.Length);
for (int i = 0; i < 1024; i++)
{
locations[i] = new ChunkLocation(locationBuffer, i * 4);
}
}
public ChunkData(Stream stream, ChunkLocation location)
{
byte[] loadBuffer = new byte[location.SectorCount * 4096];
stream.Seek(location.Offset * 4096, SeekOrigin.Begin);
stream.Read(loadBuffer, 0, loadBuffer.Length);
// Javaのビッグエンディアンで記述されている為必要なら反転
if (BitConverter.IsLittleEndian)
{
Array.Reverse(loadBuffer, 0, 4);
}
uint dataLength = BitConverter.ToUInt32(loadBuffer, 0);
// 直前に反転させた場合念のため元に戻す
if (BitConverter.IsLittleEndian)
{
Array.Reverse(loadBuffer, 0, 4);
}
if (1 == loadBuffer[4])
{
CompressionType = ChunkCompressionType.GZip;
}
else if (2 == loadBuffer[4])
{
CompressionType = ChunkCompressionType.Zlib;
}
else
{
throw new InvalidDataException("Unknown chunk compression type.");
}
// length(4byte), 圧縮方式(1byte), RFC1950ヘッダ(2byte:0x789C)をスキップしたデータを渡す
// lengthは圧縮方式とRFC1950ヘッダも含む為3byte減らす
chunkNBTBinary = Decompress(loadBuffer, 7, (int)dataLength - 3, CompressionType);
// キャッシュへ登録
cacheCompressData = new byte[dataLength - 3];
Buffer.BlockCopy(loadBuffer, 7, cacheCompressData, 0, cacheCompressData.Length);
doUseCache = true;
#if DEBUG
originalSectorDump = loadBuffer;
#endif
}
