gfxmath_vec2/impls/hash/
hash.rs

1
2use core::hash::Hash;
3use crate::Vec2;
4
5const HASH_PRIME: u32 = 31;
6
7//////////     FLOATS    ////////////
8impl Hash for Vec2<f32> {
9    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
10        let xu = unsafe { *(&self.x as *const _ as *const u32) };
11        let yu = unsafe { *(&self.y as *const _ as *const u32) };
12
13        xu.hash(state);
14        HASH_PRIME.hash(state);
15        yu.hash(state);
16        HASH_PRIME.hash(state);
17    }
18}
19
20impl Hash for Vec2<f64> {
21    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
22        let xu = unsafe { *(&self.x as *const _ as *const u64) };
23        let yu = unsafe { *(&self.y as *const _ as *const u64) };
24
25        xu.hash(state);
26        HASH_PRIME.hash(state);
27        yu.hash(state);
28        HASH_PRIME.hash(state);
29    }
30}
31// END OF -- FLOATS    /////////////
32
33
34///////////// SIGNED INTEGERS ////////////
35impl Hash for Vec2<i32> {
36    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
37        self.x.hash(state);
38        HASH_PRIME.hash(state);
39        self.y.hash(state);
40        HASH_PRIME.hash(state);
41    }
42}
43
44impl Hash for Vec2<i64> {
45    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
46        self.x.hash(state);
47        HASH_PRIME.hash(state);
48        self.y.hash(state);
49        HASH_PRIME.hash(state);
50    }
51}
52// END OF --  SIGNED INTEGERS ////////////
53
54
55
56
57/////////// UNSIGNED INTEGERS ////////////
58impl Hash for Vec2<u32> {
59    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
60        self.x.hash(state);
61        HASH_PRIME.hash(state);
62        self.y.hash(state);
63        HASH_PRIME.hash(state);
64    }
65}
66
67impl Hash for Vec2<u64> {
68    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
69        self.x.hash(state);
70        HASH_PRIME.hash(state);
71        self.y.hash(state);
72        HASH_PRIME.hash(state);
73    }
74}
75// END OF --UNSIGNED INTEGERS ////////////
76
77
78#[cfg(test)]
79mod tests {
80    use std::collections::{HashSet};
81
82    use crate::Vec2;
83
84    #[test]
85    fn test_hashset() {
86        let mut set = HashSet::new();
87        let v = Vec2::<f32>::new(2.0, 4.0);
88        set.insert(v.clone());
89        assert!(set.contains(&v));
90
91        let mut set = HashSet::new();
92        let v = Vec2::<f64>::new(2.0, 4.0);
93        set.insert(v.clone());
94        assert!(set.contains(&v));
95    }
96
97    #[test]
98    fn test_hashset_integers() {
99        let mut set = HashSet::new();
100        let v = Vec2::<i32>::new(2, 4);
101        set.insert(v.clone());
102        assert!(set.contains(&v));
103
104        let mut set = HashSet::new();
105        let v = Vec2::<i64>::new(2, 4);
106        set.insert(v.clone());
107        assert!(set.contains(&v));
108    }
109}
gfxmath_vec2/impls/hash/hash.rs

gfxmath_vec2/impls/hash/
hash.rs
