private static long HandleAdjustRelativeBaseCommand(IIntCodeMemory workingMemory, long relativeBase, long programPosition, InstructionMode modeParam1)
{
long input1 = workingMemory[programPosition + 1];
long value1 = GetValueForInput(workingMemory, relativeBase, modeParam1, input1);
relativeBase += value1;
return(relativeBase);
}
private static long GetValueForInput(IIntCodeMemory workingMemory, long relativeBase, InstructionMode modeParam, long input)
{
return(modeParam switch
{
InstructionMode.PositionMode => workingMemory[input],
InstructionMode.ImmediateMode => input,
InstructionMode.RelativeMode => workingMemory[relativeBase + input],
_ => throw new Exception("Unexpected instruction mode"),
});
private static void HandleInputCommand(Func <long>?input, IIntCodeMemory workingMemory, long relativeBase, long programPosition, InstructionMode modeParam1)
{
if (input == null)
{
throw new Exception("Program is expecting Input to be wired up");
}
long input1 = workingMemory[programPosition + 1];
WriteResultToWorkingMemory(input(), workingMemory, relativeBase, modeParam1, input1);
}
private static void HandleOutputCommand(Action <long>?output, IIntCodeMemory workingMemory, long relativeBase, long programPosition, InstructionMode modeParam1)
{
long input1 = workingMemory[programPosition + 1];
long param1 = GetValueForInput(workingMemory, relativeBase, modeParam1, input1);
if (output == null)
{
throw new Exception("Program is expecting Output to be wired up");
}
output(param1);
}
private static void HandleJumpCommands(IIntCodeMemory workingMemory, ref int sizeOfInstruction, long relativeBase, ref long programPosition, IntInstruction instruction, InstructionMode modeParam1, InstructionMode modeParam2)
{
long input1 = workingMemory[programPosition + 1];
long param1 = GetValueForInput(workingMemory, relativeBase, modeParam1, input1);
long input2 = workingMemory[programPosition + 2];
long param2 = GetValueForInput(workingMemory, relativeBase, modeParam2, input2);
if ((instruction == IntInstruction.JumpIfTrue && (param1 != 0)) ||
(instruction == IntInstruction.JumpIfFalse && (param1 == 0)))
{
programPosition = param2;
sizeOfInstruction = 0;
}
}
private static void HandleAdditionOrMultiplicationCommands(IIntCodeMemory workingMemory, long programPosition, long relativeBase, IntInstruction instruction, InstructionMode modeParam1, InstructionMode modeParam2, InstructionMode modeParam3)
{
long input1 = workingMemory[programPosition + 1];
long value1 = GetValueForInput(workingMemory, relativeBase, modeParam1, input1);
long input2 = workingMemory[programPosition + 2];
long value2 = GetValueForInput(workingMemory, relativeBase, modeParam2, input2);
long input3 = workingMemory[programPosition + 3];
long result = instruction switch
{
IntInstruction.Add => value1 + value2,
IntInstruction.Multiply => value1 * value2,
_ => throw new Exception("Unrecognized IntInstruction"),
};
WriteResultToWorkingMemory(result, workingMemory, relativeBase, modeParam3, input3);
}
private static void HandleComparisonCommands(IIntCodeMemory workingMemory, long relativeBase, long programPosition, IntInstruction instruction, InstructionMode modeParam1, InstructionMode modeParam2, InstructionMode modeParam3)
{
long input1 = workingMemory[programPosition + 1];
long value1 = GetValueForInput(workingMemory, relativeBase, modeParam1, input1);
long input2 = workingMemory[programPosition + 2];
long value2 = GetValueForInput(workingMemory, relativeBase, modeParam2, input2);
long input3 = workingMemory[programPosition + 3];
var result = instruction switch
{
IntInstruction.LessThan => value1 < value2 ? 1 : 0,
IntInstruction.Equals => value1 == value2 ? 1 : 0,
_ => throw new Exception("Unexpected instruction")
};
WriteResultToWorkingMemory(result, workingMemory, relativeBase, modeParam3, input3);
}
