RiakClient.Erlang.OtpInputStream.ReadTupleHead C# (CSharp) Method

        public int ReadTupleHead()
        {
            int arity = 0;
            byte tag = Read1SkipVersion();

            // decode the tuple header and get arity
            switch (tag)
            {
                case OtpExternal.SmallTupleTag:
                    arity = Read1();
                    break;
                case OtpExternal.LargeTupleTag:
                    arity = Read4BE();
                    break;
                default:
                    throw OnBadTag(
                        tag,
                        OtpExternal.SmallTupleTag,
                        OtpExternal.LargeTupleTag);
            }

            return arity;
        }

        public static RiakException MaybeRiakError(byte[] response)
        {
            RiakException rv = null;

            if (EnumerableUtil.IsNullOrEmpty(response))
            {
                string errMsg = "TTB request returned null or zero-length data buffer.";
                rv = new RiakException(0, errMsg, false);
            }

            using (var s = new OtpInputStream(response))
            {
                string atom;
                byte tag = s.Peek1SkipVersion();
                switch (tag)
                {
                    case OtpExternal.AtomTag:
                        atom = s.ReadAtom();
                        if (atom.Equals(RpbErrorRespAtom))
                        {
                            throw new RiakException(0, RpbErrorRespEmpty, false);
                        }

                        break;
                    case OtpExternal.SmallTupleTag:
                    case OtpExternal.LargeTupleTag:
                        int arity = s.ReadTupleHead();
                        if (arity >= 1)
                        {
                            tag = s.Peek();
                            if (tag == OtpExternal.AtomTag)
                            {
                                atom = s.ReadAtom();
                                if (atom.Equals(RpbErrorRespAtom))
                                {
                                    arity--; // We've read one item in the tuple
                                    string errMsg = RpbErrorRespEmpty;
                                    int errCode = 0;

                                    for (int i = 0; i < arity; ++i)
                                    {
                                        tag = s.Peek();
                                        if (tag == OtpExternal.BinTag)
                                        {
                                            errMsg = s.ReadBinaryAsString();
                                        }
                                        else if (s.IsLongTag(tag))
                                        {
                                            errCode = (int)s.ReadLong();
                                        }
                                        else
                                        {
                                            errMsg = string.Format("Unexpected tag {0} in {1}", tag, RpbErrorRespAtom);
                                            errCode = 0;
                                            break;
                                        }
                                    }

                                    rv = new RiakException(errCode, errMsg, false);
                                }
                            }
                        }

                        break;
                }
            }

            return rv;
        }