Hl7Handler example buffer

hl7-buffer-example.cs

        private static IMessage readMessage(StreamReader reader, Encoding encoding, int bufferSize)
        {
            var messageData = new StringBuilder();
            if (!readStartMarker(reader))
                return null; //throw ??

            var buffer = new char[bufferSize];
            while (true)
            {
                var bytesRec = reader.Read(buffer, 0, bufferSize);
                var block = new string(buffer, 0, bytesRec);
                var endMarker = block.IndexOf(encoding.GetString(Markers.end, 0, Markers.end.Length), StringComparison.Ordinal);
                if (endMarker > 0)
                    block = block.Substring(0, endMarker);
                messageData.Append(block);
                if (endMarker > 0)
                    break;
            }

            var parser = new PipeParser();
            return parser.Parse(messageData.ToString());
        }

        private static bool readStartMarker(StreamReader reader)
        {
            var reveived = reader.Peek();
            if (reveived != Markers.start[0])
                return false;
            var buffer = new char[1];
            reader.Read(buffer, 0, 1);
            return true;
        }