Microsoft.Protocols.TestSuites.Common.Common.DecompressStream C# (CSharp) 메소드

        public static byte[] DecompressStream(byte[] inputStream)
        {
            #region Consts

            // Size of Version field in RPC_HEADER_EXT
            const int RpcHeaderExtVersionByteSize = 2;

            // Size of Flags field in RPC_HEADER_EXT
            const int RpcHeaderExtFlagsByteSize = 2;

            // Size of Size field in RPC_HEADER_EXT
            const int RpcHeaderExtSizeByteSize = 2;

            // Size of SizeActual field in RPC_HEADER_EXT
            const int RpcHeaderExtSizeActualByteSize = 2;

            // The length of RPC_HEADER_EXT.
            const int RPCHeaderExtLength = 8;

            #endregion

            if (inputStream == null)
            {
                throw new ArgumentNullException("inputStream");
            }

            if (inputStream.Length < RPCHeaderExtLength)
            {
                throw new ArgumentException("Input must contain valid RPC_HEADER_EXT.", "inputStream");
            }

            // The third and fourth byte represents Flags field in RPC_HEADER_EXT
            RpcHeaderExtFlags flag = (RpcHeaderExtFlags)BitConverter.ToInt16(inputStream, RpcHeaderExtVersionByteSize);
            if ((flag & RpcHeaderExtFlags.Compressed) == RpcHeaderExtFlags.None)
            {
                // Data is not compressed, no need to decompress
                return inputStream;
            }

            ushort compressedSize = BitConverter.ToUInt16(inputStream, RpcHeaderExtVersionByteSize + RpcHeaderExtFlagsByteSize);
            ushort actualSize = BitConverter.ToUInt16(inputStream, RpcHeaderExtVersionByteSize + RpcHeaderExtFlagsByteSize + RpcHeaderExtSizeByteSize);

            // Decompress payload
            byte[] originalPayload = new byte[compressedSize];
            Array.Copy(inputStream, RPCHeaderExtLength, originalPayload, 0, compressedSize);
            byte[] decompressedPayload = LZ77Decompress(originalPayload, actualSize);
            byte[] outStream = new byte[RPCHeaderExtLength + actualSize];
            Array.Copy(inputStream, 0, outStream, 0, RPCHeaderExtLength);
            Array.Copy(decompressedPayload, 0, outStream, RPCHeaderExtLength, actualSize);

            // Change Flag field to uncompressed
            flag &= ~RpcHeaderExtFlags.Compressed;
            Array.Copy(BitConverter.GetBytes((short)flag), 0, outStream, RpcHeaderExtVersionByteSize, RpcHeaderExtFlagsByteSize);

            // Set Size value to ActualSize value.
            Array.Copy(outStream, RpcHeaderExtVersionByteSize + RpcHeaderExtFlagsByteSize + RpcHeaderExtSizeActualByteSize, outStream, RpcHeaderExtVersionByteSize + RpcHeaderExtFlagsByteSize, RpcHeaderExtSizeByteSize);

            return outStream;
        }