public static int ParseParameter(Command.ParameterType t, PreParsedLine l, out ParsedType foundType, Dictionary <string, Alias> aliases, Dictionary <string, int> labels = null)
{
int x = 0;
foundType = ParsedType.Constant;
switch (t)
{
case Command.ParameterType.Label:
if (labels != null && !labels.TryGetValue(l.Parameter.Value, out x))
{
throw new ArgumentException("Unable to find label '" + l.Parameter + "' of line '" + l.InputLine + "'");
}
foundType = ParsedType.Label;
break;
case Command.ParameterType.Constant:
if (!int.TryParse(l.Parameter.Value, out x))
{
throw new ArgumentException("Unable to parse parameter '" + l.Parameter + "' of line '" + l.InputLine + "'");
}
break;
case Command.ParameterType.StackDelta:
x = ParseNonNegative(l);
foundType = ParsedType.StackDelta;
break;
case Command.ParameterType.StackAddress:
x = ParseNonNegative(l);
foundType = ParsedType.Address;
break;
case Command.ParameterType.Address:
foundType = ParsedType.Address;
if (!int.TryParse(l.Parameter.Value, out x))
{
Alias alias;
if (aliases.TryGetValue(l.Parameter.Value, out alias))
{
x = alias.Address;
foundType = ParsedType.Alias;
}
else
{
throw new ArgumentException("Unable to parse address parameter '" + l.Parameter + "' of line '" + l.InputLine + "'. Parameter is no valid integer, or known alias");
}
}
if (x < 0 || x >= State.MemorySize)
{
throw new ArgumentException("Address parameter '" + l.Parameter + "' of line '" + l.InputLine + "' exceeds valid address range");
}
break;
}
return(x);
}
private static void Register(string name, Action <State, int> action, Command.ParameterType t)
{
commands.Add(name, new Command(name, action, t));
}
