aisling 0.3.17

Embeddable terminal text effects and loaders for Rust TUI applications.
Documentation 
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

#[derive(Clone, Debug)]
pub(crate) struct SmallRng {
    state: u64,
}

impl SmallRng {
    pub(crate) fn new(seed: u64) -> Self {
        let state = if seed == 0 {
            0x9e37_79b9_7f4a_7c15
        } else {
            seed
        };
        Self { state }
    }

    pub(crate) fn next_u64(&mut self) -> u64 {
        let mut x = self.state;
        x ^= x >> 12;
        x ^= x << 25;
        x ^= x >> 27;
        self.state = x;
        x.wrapping_mul(0x2545_f491_4f6c_dd1d)
    }

    pub(crate) fn f32(&mut self) -> f32 {
        let value = self.next_u64() >> 40;
        value as f32 / ((1u64 << 24) - 1) as f32
    }

    pub(crate) fn range_f32(&mut self, min: f32, max: f32) -> f32 {
        min + (max - min) * self.f32()
    }

    pub(crate) fn usize(&mut self, max: usize) -> usize {
        if max == 0 {
            0
        } else {
            (self.next_u64() as usize) % max
        }
    }

    pub(crate) fn shuffle<T>(&mut self, values: &mut [T]) {
        for i in (1..values.len()).rev() {
            let j = self.usize(i + 1);
            values.swap(i, j);
        }
    }
}

pub(crate) fn hash(seed: u64, a: u64, b: u64, c: u64) -> u64 {
    let mut x = seed
        ^ a.wrapping_mul(0x9e37_79b9_7f4a_7c15)
        ^ b.wrapping_mul(0xbf58_476d_1ce4_e5b9)
        ^ c.wrapping_mul(0x94d0_49bb_1331_11eb);
    x ^= x >> 30;
    x = x.wrapping_mul(0xbf58_476d_1ce4_e5b9);
    x ^= x >> 27;
    x = x.wrapping_mul(0x94d0_49bb_1331_11eb);
    x ^ (x >> 31)
}

pub(crate) fn hash_f32(seed: u64, a: u64, b: u64, c: u64) -> f32 {
    let value = hash(seed, a, b, c) >> 40;
    value as f32 / ((1u64 << 24) - 1) as f32
}