/// <summary>
/// Resets the int code computer to its starting status
/// </summary>
public void Reset()
{
State = IntCodeComputerState.Idle;
Code = _originalCode.ToList();
_currentInstruction = null;
_operations = 0;
}
/// <summary>
/// Exxecutes the defined function for a given opCode
/// </summary>
/// <returns></returns>
private void ExecuteOpCode()
{
UpdateInstructionPointer();
switch (_currentInstruction.OpCode)
{
case InstructionModes.Addition:
Addition();
break;
case InstructionModes.Multiplication:
Multiplication();
break;
case InstructionModes.Input:
Input().Wait();
break;
case InstructionModes.Output:
Output();
if (!ContinueAfterOutput)
{
State = IntCodeComputerState.ProducedOutput;
}
break;
case InstructionModes.JumpIfTrue:
JumpIfTrue();
break;
case InstructionModes.JumpIfFalse:
JumpIfFalse();
break;
case InstructionModes.LessThan:
LessThan();
break;
case InstructionModes.Equals:
Equals();
break;
case InstructionModes.RelativeBaseOffset:
RelativeBaseOffset();
break;
case InstructionModes.Exit:
State = IntCodeComputerState.Finished;
break;
default:
throw new ArgumentException($"OpCode {_currentInstruction.OpCode} unkonwn");
}
_operations++;
}
/// <summary>
/// Reads an input parameter
/// </summary>
private async Task Input()
{
State = IntCodeComputerState.WaitingForInput;
var input = await InputReader.RequestInput().ConfigureAwait(false);
State = IntCodeComputerState.Running;
_currentInstruction.SetValue(ref Code, 0, input);
}
/// <summary>
/// Gets the opCode from the specified index and calls the specified
/// method for that code. With the new code this function is called again,
/// until the opCode 99 is hit
/// </summary>
/// <returns></returns>
public void Compute()
{
try
{
State = IntCodeComputerState.Running;
while (State == IntCodeComputerState.Running)
{
ExecuteOpCode();
}
}
catch (Exception e)
{
State = IntCodeComputerState.Failed;
throw e;
}
}
