cxmr_balances/
points.rs

1/// Trait converting price into points.
2pub trait IntoPoints {
3    fn into_points(self) -> u64;
4}
5
6impl IntoPoints for f64 {
7    #[inline(always)]
8    fn into_points(self) -> u64 {
9        points(self)
10    }
11}
12
13impl IntoPoints for f32 {
14    #[inline(always)]
15    fn into_points(self) -> u64 {
16        points(self as f64)
17    }
18}
19
20impl IntoPoints for u64 {
21    #[inline(always)]
22    fn into_points(self) -> u64 {
23        self
24    }
25}
26
27/// Trait converting points into price.
28pub trait IntoPrice {
29    fn into_price(self) -> f64;
30}
31
32impl IntoPrice for u64 {
33    #[inline(always)]
34    fn into_price(self) -> f64 {
35        price(self)
36    }
37}
38
39impl IntoPrice for f64 {
40    fn into_price(self) -> f64 {
41        self
42    }
43}
44
45impl IntoPrice for f32 {
46    fn into_price(self) -> f64 {
47        self as f64
48    }
49}
50
51/// Converts points to market price.
52#[inline(always)]
53pub fn points(price: f64) -> u64 {
54    (price * 1e8).round() as u64
55}
56
57/// Converts market price to points.
58#[inline(always)]
59pub fn price(points: u64) -> f64 {
60    points as f64 / 1e8
61}
62
63#[cfg(test)]
64mod tests {
65    use super::*;
66
67    #[test]
68    fn price_points() {
69        assert_eq!(points(1.0), 100000000);
70        assert_eq!(points(2.55751896), 255751896);
71        assert_eq!(points(0.00049245), 49245);
72        assert_eq!(price(49245), 0.00049245);
73        assert_eq!(points(0.015399360), 1539936);
74        assert_eq!(price(1539936), 0.01539936);
75        assert_eq!(points(0.09744111), 9744111);
76        assert_eq!(price(9744111), 0.09744111);
77        assert_eq!(points(0.15399360), 15399360);
78        assert_eq!(price(15399360), 0.15399360);
79        assert_eq!(points(0.00000354), 354);
80        assert_eq!(price(354), 0.00000354);
81
82        assert_eq!(points(0.20425743), 20425743);
83        assert_eq!(price(20425743), 0.20425743);
84        assert_eq!(points(0.03300001), 03300001);
85        assert_eq!(price(03300001), 0.03300001);
86
87        // xrp/btc price 12/26/2018
88        assert_eq!(points(0.00010030), 10030);
89        assert_eq!(price(10030), 0.00010030);
90        // ada/btc price 12/26/2018
91        assert_eq!(points(0.00001104), 1104);
92        assert_eq!(price(1104), 0.00001104);
93        // bnb commision
94        assert_eq!(points(0.01497375), 1497375);
95        assert_eq!(price(1497375), 0.01497375);
96    }
97
98    #[test]
99    fn points_u64_max() {
100        let r = points(0.00015370);
101        let a = points(12e6);
102        assert!(r * a < ::std::u64::MAX);
103    }
104}
cxmr_balances/points.rs

cxmr_balances/
points.rs
