1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
use core::fmt::Debug;
use core::marker::PhantomData;
use super::{JoystickDevice, Directions, JoystickInterface};
const UNUSED_MASK: u8 = 0b1110_0000;
#[derive(Clone, Copy, Debug)]
pub struct SinclairJoystickDevice<S> {
data: u8,
directions: Directions,
_side: PhantomData<S>
}
pub trait SinclairJoyKeyMap: Debug {
const FIRE_MASK: u8;
const UP_MASK: u8;
const DOWN_MASK: u8;
const RIGHT_MASK: u8;
const LEFT_MASK: u8;
}
#[derive(Clone, Copy, Default, Debug)]
pub struct SinclairJoyLeftMap;
impl SinclairJoyKeyMap for SinclairJoyLeftMap {
const FIRE_MASK: u8 = 0b0001_0000;
const UP_MASK: u8 = 0b0000_1000;
const DOWN_MASK: u8 = 0b0000_0100;
const RIGHT_MASK: u8 = 0b0000_0010;
const LEFT_MASK: u8 = 0b0000_0001;
}
#[derive(Clone, Copy, Default, Debug)]
pub struct SinclairJoyRightMap;
impl SinclairJoyKeyMap for SinclairJoyRightMap {
const FIRE_MASK: u8 = 0b0000_0001;
const UP_MASK: u8 = 0b0000_0010;
const DOWN_MASK: u8 = 0b0000_0100;
const RIGHT_MASK: u8 = 0b0000_1000;
const LEFT_MASK: u8 = 0b0001_0000;
}
impl<S> Default for SinclairJoystickDevice<S> {
fn default() -> Self {
SinclairJoystickDevice {
data: !0,
directions: Directions::empty(),
_side: PhantomData
}
}
}
impl<S: Debug> JoystickDevice for SinclairJoystickDevice<S> {
#[inline]
fn port_read(&self, _port: u16) -> u8 {
self.data
}
}
impl<S> JoystickInterface for SinclairJoystickDevice<S>
where S: SinclairJoyKeyMap
{
fn fire(&mut self, _btn: u8, pressed: bool) {
if pressed {
self.data &= !S::FIRE_MASK;
}
else {
self.data |= S::FIRE_MASK;
}
}
fn get_fire(&self, _btn: u8) -> bool {
self.data & S::FIRE_MASK == 0
}
fn set_directions(&mut self, dir: Directions) {
self.directions = dir;
self.data = (self.data & (S::FIRE_MASK|UNUSED_MASK)) |
if dir.intersects(Directions::UP) { 0 } else { S::UP_MASK } |
if dir.intersects(Directions::RIGHT) { 0 } else { S::RIGHT_MASK } |
if dir.intersects(Directions::DOWN) { 0 } else { S::DOWN_MASK } |
if dir.intersects(Directions::LEFT) { 0 } else { S::LEFT_MASK };
}
fn get_directions(&self) -> Directions {
self.directions
}
}