private void RunOperation(IntOp operation)
{
switch (operation.Code)
{
case IntOp.OpCode.Add: Add(operation); break;
case IntOp.OpCode.Multiply: Multiply(operation); break;
case IntOp.OpCode.Input: Input(operation); break;
case IntOp.OpCode.Output: Output(operation); break;
case IntOp.OpCode.JumpIfTrue: JumpIfTrue(operation); break;
case IntOp.OpCode.JumpIfFalse: JumpIfFalse(operation); break;
case IntOp.OpCode.LessThan: LessThan(operation); break;
case IntOp.OpCode.Equals: Equals(operation); break;
case IntOp.OpCode.MoveRelative: MoveRelative(operation); break;
case IntOp.OpCode.End:
_running = false;
OutputLog.Add("Complete");
break;
default:
throw new Exception("Invalid OpCode in operation");
}
}
private void MoveRelative(IntOp o)
{
var a = GetParam(1, o);
_relativeBase += a;
_pointer += 2;
}
private void LessThan(IntOp o)
{
var a = GetParam(1, o);
var b = GetParam(2, o);
SetParamAt(3, o, a < b ? 1 : 0);
_pointer += 4;
}
private void Equals(IntOp o)
{
var a = GetParam(1, o);
var b = GetParam(2, o);
SetParamAt(3, o, a == b ? 1 : 0);
_pointer += 4;
}
private void Multiply(IntOp o)
{
var a = GetParam(1, o);
var b = GetParam(2, o);
SetParamAt(3, o, a * b);
_pointer += 4;
}
private void Add(IntOp o)
{
var a = GetParam(1, o);
var b = GetParam(2, o);
SetParamAt(3, o, a + b);
_pointer += 4;
}
/// <summary>
/// Gets the memory location relevant to the parameter and IntOp, and sets it to value
/// Setting parameters will never be in ParamMode.Position.
/// </summary>
/// <param name="i"> The parameter of the operation, [A, B, C] => [1, 2, 3]</param>
/// <param name="o"> The operation for the ParamMode </param>
/// <param name="value"> The value to set the _memory at the location </param>
private void SetParamAt(int i, IntOp o, long value)
{
var p = GetMemoryAtLocation(_pointer + i);
if (o.GetMode(i - 1).Equals(IntOp.ParamMode.Relative))
{
p += _relativeBase;
}
_memory[p] = value;
}
private void Input(IntOp o)
{
// If there is no inputs we need to wait until there is more
if (_inputs.Count == 0)
{
_running = false;
return;
}
SetParamAt(1, o, _inputs.Pop());
_pointer += 2;
}
public void Run()
{
_running = true;
OutputLog = new List <string>();
while (_running)
{
// Get the operation at the current position
var op = IntOp.ParseFromString(_memory[_pointer].ToString());
// Call the relevant operation
// Operations move the position value
RunOperation(op);
}
}
private void JumpIfFalse(IntOp o)
{
// If a is false, set position to b
var a = GetParam(1, o);
var b = GetParam(2, o);
if (a == 0)
{
_pointer = b;
}
else
{
_pointer += 3;
}
}
private void Output(IntOp o)
{
var output = GetParam(1, o);
OutputLog.Add(output.ToString());
if (OutputToConsole)
{
Console.WriteLine(output);
}
if (StopAtOutput)
{
_running = false;
}
_pointer += 2;
}
private long GetParam(int i, IntOp o)
{
return(GetValueAt(_pointer + i, o.GetMode(i - 1)));
}