Assembler.DataInstruction.Add C# (CSharp) Method

        public void Add(short value)
        {
            bytes.AddRange(BitConverter.GetBytes(value));
        }

        private void Parse()
        {
            var t = tokens[pos];

            while (t.Type != TokenType.EndOfFile)
            {
                if (t.Type == TokenType.Label)
                {
                    var prefix = "";

                    if (t.Value.StartsWith("."))
                    {
                        if (parentLabel == null)
                        {
                            throw new AssemblerException(string.Format("Local label with no parent on line {0}", t.Line));
                        }

                        prefix = parentLabel;
                    }
                    else
                    {
                        if (t.Value.Contains("."))
                        {
                            throw new AssemblerException(string.Format("Period used in global label declaration on line {0}", t.Line));
                        }

                        parentLabel = t.Value;
                    }

                    var label = prefix + t.Value;
                    if (labels.ContainsKey(label))
                    {
                        throw new AssemblerException(string.Format("Duplicate label '{0}' on line {1}", label, t.Line));
                    }

                    labels.Add(label, new Label(label, instructions.Count));
                    pos++;
                }
                else if (t.Type == TokenType.Opcode)
                {
                    instructions.Add(ParseInstruction());
                }
                else if (t.Type == TokenType.Word && t.Value.ToLower() == "dat")
                {
                    t = tokens[++pos];

                    var data = new DataInstruction();
                    while (t.Type == TokenType.Number)
                    {
                        short value;
                        short.TryParse(t.Value, out value);

                        data.Add(value);

                        pos++;

                        if (tokens[pos].Type == TokenType.Comma)
                        {
                            t = tokens[++pos];
                            continue;
                        }

                        break;
                    }

                    instructions.Add(data);
                }
                else if (t.Type == TokenType.Word && t.Value.ToLower() == "resv")
                {
                    t = tokens[++pos];

                    if (t.Type != TokenType.Number)
                    {
                        throw new AssemblerException(string.Format("Expected Number on line {0}", t.Line));
                    }

                    var data  = new DataInstruction();
                    var count = short.Parse(t.Value);

                    for (var i = 0; i < count; i++)
                    {
                        data.Add(0);
                    }

                    pos++;
                    instructions.Add(data);
                }
                else
                {
                    throw new AssemblerException(string.Format("Unexpected {0} on line {1}", t.Type, t.Line));
                }

                t = tokens[pos];
            }
        }