private StringMatch MatchString(string value, Dictionary<string, byte> keys)
        {
            value = value.Trim();
            StringMatch match = new StringMatch();
            match.appendedValues = new string[0];
            foreach (var opcode in keys)
            {
                int valueIndex = 0;
                bool requiredWhitespaceMet = false;
                bool matchFound = true;
                match.appendedValues = new string[0];
                for (int i = 0; i < opcode.Key.Length && valueIndex < value.Length; i++)
                {
                    match.match = opcode.Key;
                    match.value = opcode.Value;
                    if (opcode.Key[i] == '_') // Required whitespace
                    {
                        if (value[valueIndex] == ' ' || value[valueIndex] == '\t')
                        {
                            requiredWhitespaceMet = true;
                            i--;
                            valueIndex++;
                        }
                        else
                        {
                            if (!requiredWhitespaceMet)
                            {
                                matchFound = false;
                                break;
                            }
                            requiredWhitespaceMet = false;
                        }
                    }
                    else if (opcode.Key[i] == '-') // Optional whitespace
                    {
                        if (value[valueIndex] == ' ' || value[valueIndex] == '\t')
                        {
                            i--;
                            valueIndex++;
                        }
                    }
                    else if (opcode.Key[i] == '%') // value, like A or POP
                    {
                        i++;
                        char valID = opcode.Key[i];
                        int valueStart = valueIndex;
                        if (i == opcode.Key.Length - 1)
                        {
                            valueIndex = value.Length;
                        }
                        else
                        {
                            int delimiter = value.IndexOf(',', valueIndex);
                            if (delimiter == -1)
                            {
                                matchFound = false;
                                break;
                            }
                            else
                                valueIndex = delimiter;
                        }
                        if (valID == 'a')
                            match.valueA = value.Substring(valueStart, valueIndex - valueStart);
                        else
                            match.valueB = value.Substring(valueStart, valueIndex - valueStart);
                    }
                    else if (opcode.Key[i] == '$') // Literal
                    {
                        i++;
                        char valID = opcode.Key[i];
                        int valueStart = valueIndex;
                        if (i == opcode.Key.Length - 1)
                        {
                            valueIndex = value.Length;
                        }
                        else
                        {
                            int delimiter = value.IndexOf(',', valueIndex);
                            if (delimiter == -1 && opcode.Value != 0x1E)
                                delimiter = value.IndexOf('+', valueIndex);
                            if (delimiter == -1)
                                delimiter = value.IndexOf(']', valueIndex);
                            if (delimiter == -1)
                            {
                                matchFound = false;
                                break;
                            }
                            else
                                valueIndex = delimiter;
                        }
                        match.appendedValues = match.appendedValues.Concat(new string[] {
                            value.Substring(valueStart, valueIndex - valueStart) }).ToArray();
                    }
                    else
                    {
                        if (value.ToUpper()[valueIndex] != opcode.Key.ToUpper()[i])
                        {
                            matchFound = false;
                            break;
                        }
                        valueIndex++;
                    }
                }
                if (matchFound)
                    return match;
            }
            return null;
        }