Alexandria.Engines.Creation.RecordReader.CheckReader C# (CSharp) Method

        void CheckReader()
        {
            if (reader == null) {
                if (!record.IsCompressed)
                    throw new InvalidOperationException();
                int compressedSize = checked((int)record.Size);
                int uncompressedSize = checked((int)compressedReader.ReadUInt32());

                byte[] compressedData = new byte[compressedSize];
                byte[] uncompressedData = new byte[uncompressedSize];

                int compressedRead = compressedReader.Read(compressedData, 0, compressedSize);
                Inflater inflater = new Inflater();
                inflater.SetInput(compressedData);
                int uncompressedRead = inflater.Inflate(uncompressedData, 0, uncompressedSize);
                reader = new BinaryReader(new MemoryStream(uncompressedData, false));
                endOffset = uncompressedSize;
            }
        }