private static DataStream Inflate(DataStream source, EndiannessMode endianness)
{
DataStream dest = DataStreamFactory.FromMemory();
source.Seek(0);
var reader = new DataReader(source)
{
Endianness = endianness,
};
int size = reader.ReadInt32();
int chunkSize = reader.ReadInt32();
while (chunkSize != 0)
{
using var zlibStream = new ZlibStream(dest, CompressionMode.Decompress, true);
source.WriteSegmentTo(source.Position, chunkSize, zlibStream);
zlibStream.Close();
source.Seek(chunkSize, SeekOrigin.Current);
chunkSize = reader.ReadInt32();
}
if (dest.Length != size)
{
throw new ExtractionException("Result size doesn't match with expected size.");
}
return(dest);
}
private static DataStream Deflate(DataStream source, EndiannessMode endianness)
{
DataStream dest = DataStreamFactory.FromMemory();
var writer = new DataWriter(dest)
{
Endianness = endianness,
};
source.Seek(0);
writer.Write((int)source.Length);
int remaining = (int)source.Length;
while (remaining > 0)
{
int chunkSize = Math.Min(remaining, 0x8000);
long lengthPos = dest.Position;
writer.Write(0); // size placeholder
long startDataPos = dest.Position;
using var zlibStream = new ZlibStream(dest, CompressionMode.Compress, CompressionLevel.BestCompression, true);
source.WriteSegmentTo(source.Position, chunkSize, zlibStream);
zlibStream.Close();
long compressedChunkSize = dest.Position - startDataPos;
dest.PushToPosition(lengthPos);
writer.Write((int)compressedChunkSize);
dest.PopPosition();
source.Seek(chunkSize, SeekOrigin.Current);
remaining -= chunkSize;
}
writer.Write(0);
return(dest);
}
public DataWriter(DataStream stream, EndiannessMode endiannes, Encoding encoding)
{
this.Stream = stream;
this.Endiannes = endiannes;
this.Encoding = encoding;
}
/// <summary> /// Converter initializer. /// </summary> /// <param name="parameters">Endianness.</param> public void Initialize(EndiannessMode parameters) => _endianness = parameters;
public DataReader(DataStream stream, EndiannessMode endiannes, Encoding encoding)
{
this.Stream = stream;
this.Endiannes = endiannes;
this.Encoding = encoding;
}
