internal DeflateStream(Stream compressedStream, CompressionMode mode, bool leaveOpen, bool gzip)
{
if (compressedStream == null)
{
throw new ArgumentNullException("compressedStream");
}
if (mode != CompressionMode.Compress && mode != CompressionMode.Decompress)
{
throw new ArgumentException("mode");
}
this.data = GCHandle.Alloc(this);
this.base_stream = compressedStream;
this.feeder = ((mode != CompressionMode.Compress) ? new DeflateStream.UnmanagedReadOrWrite(DeflateStream.UnmanagedRead) : new DeflateStream.UnmanagedReadOrWrite(DeflateStream.UnmanagedWrite));
this.z_stream = DeflateStream.CreateZStream(mode, gzip, this.feeder, GCHandle.ToIntPtr(this.data));
if (this.z_stream == IntPtr.Zero)
{
this.base_stream = null;
this.feeder = null;
throw new NotImplementedException("Failed to initialize zlib. You probably have an old zlib installed. Version 1.2.0.4 or later is required.");
}
this.mode = mode;
this.leaveOpen = leaveOpen;
}