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
// FIXME: do this out-of-place?
/// Sorts a set of three values in increasing order.
#[inline]
pub fn sort3<'a, N: PartialOrd>(a: &'a N, b: &'a N, c: &'a N) -> (&'a N, &'a N, &'a N) {
let a_b = *a > *b;
let a_c = *a > *c;
let b_c = *b > *c;
let sa;
let sb;
let sc;
// Sort the three values.
// FIXME: move this to the utilities?
if a_b { // a > b
if a_c { // a > c
sc = a;
if b_c { // b > c
sa = c;
sb = b;
}
else { // b <= c
sa = b;
sb = c;
}
}
else { // a <= c
sa = b;
sb = a;
sc = c;
}
}
else { // a < b
if !a_c { // a <= c
sa = a;
if b_c { // b > c
sb = c;
sc = b;
}
else {
sb = b;
sc = c;
}
}
else { // a > c
sa = c;
sb = a;
sc = b;
}
}
(sa, sb, sc)
}