public BinaryRobloxFileChunk(BinaryRobloxFileWriter writer, bool compress = true)
{
if (!writer.WritingChunk)
{
throw new Exception("BinaryRobloxFileChunk: Supplied writer must have WritingChunk set to true.");
}
Stream stream = writer.BaseStream;
using (BinaryReader reader = new BinaryReader(stream, Encoding.UTF8, true))
{
long length = (stream.Position - writer.ChunkStart);
stream.Position = writer.ChunkStart;
Size = (int)length;
Data = reader.ReadBytes(Size);
}
CompressedData = LZ4Codec.Encode(Data, 0, Size);
CompressedSize = CompressedData.Length;
if (!compress || CompressedSize > Size)
{
CompressedSize = 0;
CompressedData = new byte[0];
}
ChunkType = writer.ChunkType;
Reserved = 0;
}
public void WriteChunk(BinaryRobloxFileWriter writer)
{
// Record where we are when we start writing.
var stream = writer.BaseStream;
long startPos = stream.Position;
// Write the chunk's data.
writer.WriteString(ChunkType, true);
writer.Write(CompressedSize);
writer.Write(Size);
writer.Write(Reserved);
if (CompressedSize > 0)
{
writer.Write(CompressedData);
}
else
{
writer.Write(Data);
}
// Capture the data we wrote into a byte[] array.
long endPos = stream.Position;
int length = (int)(endPos - startPos);
using (MemoryStream buffer = new MemoryStream())
{
stream.Position = startPos;
stream.CopyTo(buffer, length);
WriteBuffer = buffer.ToArray();
HasWriteBuffer = true;
}
}
