/// <summary>
/// Accepts a single input, applying it to the memory address stored at the single parameter.
/// </summary>
public static IntCodeState ApplyInput(this IntCodeState state, long input)
{
return(new IntCodeState(state)
{
State = state.SetAt(state.WriteParameter(1), input),
Index = state.Index + 2
});
}
/// <summary>
/// Compares the first two values using the given comparator.
/// Sets the value in the index given by param 3 to either 1 or 0, reflecting the result of the comparison
/// </summary>
public static IntCodeState Compare(this IntCodeState state, Func <long, long, bool> comparator)
{
var valueToStore = comparator(state.ReadParameter(1), state.ReadParameter(2)) ? 1 : 0;
return(new IntCodeState(state)
{
State = state.SetAt(state.WriteParameter(3), valueToStore),
Index = state.Index + 4
});
}
/// <summary>
/// Applies an arbitrary operation to the first *TWO* parameters, outputting based on the third parameter.
/// Will need extending if it needs to be applied to more than two parameters.
/// </summary>
public static IntCodeState ApplyOperation(this IntCodeState state, Func <long, long, long> operation)
{
var operationResult = operation(state.ReadParameter(1), state.ReadParameter(2));
return(new IntCodeState(state)
{
State = state.SetAt(state.WriteParameter(3), operationResult),
Index = state.Index + 4
});
}
