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use super::{JoystickDevice, Directions, JoystickInterface};
const FIRE_MASK: u8 = 0b0001_0000;
const RIGHT_MASK: u8 = 0b0000_0001;
const LEFT_MASK: u8 = 0b0000_0010;
const DOWN_MASK: u8 = 0b0000_0100;
const UP_MASK: u8 = 0b0000_1000;
#[derive(Clone, Copy, Default, Debug)]
pub struct KempstonJoystickDevice {
data: u8,
directions: Directions
}
impl JoystickDevice for KempstonJoystickDevice {
#[inline]
fn port_read(&self, _port: u16) -> u8 {
self.data
}
}
impl JoystickInterface for KempstonJoystickDevice {
fn fire(&mut self, _btn: u8, pressed: bool) {
if pressed {
self.data |= FIRE_MASK;
}
else {
self.data &= !FIRE_MASK;
}
}
fn get_fire(&self, _btn: u8) -> bool {
self.data & FIRE_MASK == FIRE_MASK
}
fn set_directions(&mut self, dir: Directions) {
self.directions = dir;
self.data = (self.data & FIRE_MASK) |
if dir.intersects(Directions::UP) { UP_MASK } else { 0 } |
if dir.intersects(Directions::RIGHT) { RIGHT_MASK } else { 0 } |
if dir.intersects(Directions::DOWN) { DOWN_MASK } else { 0 } |
if dir.intersects(Directions::LEFT) { LEFT_MASK } else { 0 };
}
fn get_directions(&self) -> Directions {
self.directions
}
}