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// 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)
}