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
#![no_std]
pub trait RoundedDiv<Rhs = Self> {
type Output;
fn rounded_div(self, rhs: Rhs) -> Self::Output;
}
macro_rules! aliases {
($name:ident -> $data:ident) => {
impl RoundedDiv for $data {
type Output = Self;
#[inline]
fn rounded_div(self, rhs: $data) -> Self::Output {
$name(self, rhs)
}
}
pub use $name as $data;
};
}
macro_rules! unsigned_div_fn {
($name:ident -> $data:ident) => {
#[doc = "Get rounded result of an integer division."]
#[inline]
pub const fn $name(dividend: $data, divisor: $data) -> $data {
(dividend + (divisor >> 1)) / divisor
}
aliases!($name -> $data);
};
}
macro_rules! signed_div_fn {
($name:ident -> $data:ident) => {
#[doc = "Get rounded result of an integer division."]
#[inline]
pub const fn $name(dividend: $data, divisor: $data) -> $data {
if dividend ^ divisor >= 0 {
(dividend + (divisor / 2)) / divisor
} else {
(dividend - (divisor / 2)) / divisor
}
}
aliases!($name -> $data);
};
}
unsigned_div_fn!(rounded_div_u8 -> u8);
unsigned_div_fn!(rounded_div_u16 -> u16);
unsigned_div_fn!(rounded_div_u32 -> u32);
unsigned_div_fn!(rounded_div_u64 -> u64);
unsigned_div_fn!(rounded_div_u128 -> u128);
unsigned_div_fn!(rounded_div_usize -> usize);
signed_div_fn!(rounded_div_i8 -> i8);
signed_div_fn!(rounded_div_i16 -> i16);
signed_div_fn!(rounded_div_i32 -> i32);
signed_div_fn!(rounded_div_i64 -> i64);
signed_div_fn!(rounded_div_i128 -> i128);
signed_div_fn!(rounded_div_isize -> isize);