malachite-q 0.9.2

The arbitrary-precision type Rational, with efficient algorithms partially derived from GMP and FLINT.
Documentation 
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// Copyright © 2026 Mikhail Hogrefe
//
// This file is part of Malachite.
//
// Malachite is free software: you can redistribute it and/or modify it under the terms of the GNU
// Lesser General Public License (LGPL) as published by the Free Software Foundation; either version
// 3 of the License, or (at your option) any later version. See <https://www.gnu.org/licenses/>.

use crate::Rational;
use malachite_base::num::arithmetic::traits::UnsignedAbs;
use malachite_nz::integer::Integer;

pub fn sub_naive(x: Rational, y: Rational) -> Rational {
    let x_sign = x >= 0u32;
    let y_sign = y >= 0u32;
    let (xn, xd) = x.into_numerator_and_denominator();
    let (yn, yd) = y.into_numerator_and_denominator();
    let n =
        Integer::from_sign_and_abs(x_sign, xn * &yd) - Integer::from_sign_and_abs(y_sign, yn * &xd);
    Rational::from_sign_and_naturals(n >= 0u32, n.unsigned_abs(), xd * yd)
}