public int ProcessInstruction(string command, Coprocessor coprocessor)
{
string[] commandSplit = command.Split(' ');
switch (commandSplit[0])
{
case "set":
DetermineValue(commandSplit[1], coprocessor);
coprocessor.Registers[commandSplit[1]] = DetermineValue(commandSplit[2], coprocessor);
break;
case "sub":
DetermineValue(commandSplit[1], coprocessor);
coprocessor.Registers[commandSplit[1]] -= DetermineValue(commandSplit[2], coprocessor);
break;
case "mul":
DetermineValue(commandSplit[1], coprocessor);
coprocessor.Registers[commandSplit[1]] = coprocessor.Registers[commandSplit[1]] * DetermineValue(commandSplit[2], coprocessor);
return(1);
case "jnz":
long firstValue = DetermineValue(commandSplit[1], coprocessor);
if (firstValue != 0)
{
coprocessor.CurrentInstruction += (int)DetermineValue(commandSplit[2], coprocessor) - 1;
}
break;
default:
throw new ArgumentException("Unknown command");
}
return(0);
}
private long FindRegisterValueOrCreateNew(string key, Coprocessor coprocessor)
{
if (coprocessor.Registers.ContainsKey(key))
{
return(coprocessor.Registers[key]);
}
coprocessor.Registers.Add(key, 0);
return(0);
}
private long DetermineValue(string value, Coprocessor coprocessor)
{
long result;
if (long.TryParse(value, out result))
{
return(result);
}
long found = FindRegisterValueOrCreateNew(value, coprocessor);
return(found);
}
public int RunThroughInstructionsAndCountMult(string filePath)
{
List <string> instructions = GetInstructions(filePath);
Coprocessor coprocessor = new Coprocessor();
int count = 0;
do
{
string instruction = instructions[coprocessor.CurrentInstruction];
count += ProcessInstruction(instruction, coprocessor);
coprocessor.CurrentInstruction++;
} while (coprocessor.CurrentInstruction < 32); // 32 is lines in current program
return(count);
}