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use malachite_base::num::arithmetic::traits::Sign;
use std::cmp::Ordering;
use Rational;
impl PartialOrd for Rational {
#[inline]
fn partial_cmp(&self, other: &Rational) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for Rational {
fn cmp(&self, other: &Rational) -> Ordering {
if std::ptr::eq(self, other) {
return Ordering::Equal;
}
let self_sign = self.sign();
let other_sign = other.sign();
let sign_cmp = self_sign.cmp(&other_sign);
if sign_cmp != Ordering::Equal || self_sign == Ordering::Equal {
return sign_cmp;
}
let self_cmp_one = self.numerator.cmp(&self.denominator);
let other_cmp_one = other.numerator.cmp(&other.denominator);
let one_cmp = self_cmp_one.cmp(&other_cmp_one);
if one_cmp != Ordering::Equal {
return if self.sign {
one_cmp
} else {
one_cmp.reverse()
};
}
let n_cmp = self.numerator.cmp(&other.numerator);
let d_cmp = self.denominator.cmp(&other.denominator);
if n_cmp == Ordering::Equal && d_cmp == Ordering::Equal {
return Ordering::Equal;
} else {
let nd_cmp = n_cmp.cmp(&d_cmp);
if nd_cmp != Ordering::Equal {
return if self.sign { nd_cmp } else { nd_cmp.reverse() };
}
}
let log_cmp = self
.floor_log_base_2_of_abs()
.cmp(&other.floor_log_base_2_of_abs());
if log_cmp != Ordering::Equal {
return if self.sign {
log_cmp
} else {
log_cmp.reverse()
};
}
let prod_cmp =
(&self.numerator * &other.denominator).cmp(&(&self.denominator * &other.numerator));
if self.sign {
prod_cmp
} else {
prod_cmp.reverse()
}
}
}