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use core::ops::{Mul, Neg};
use dashu_base::{Abs, Sign, Signed};
use dashu_int::UBig;
use crate::{
rbig::{RBig, Relaxed},
repr::Repr,
};
impl RBig {
/// Get the sign of the number. Zero value has a positive sign.
///
/// # Examples
///
/// ```
/// # use dashu_base::Sign;
/// # use dashu_ratio::RBig;
/// assert_eq!(RBig::ZERO.sign(), Sign::Positive);
/// assert_eq!(RBig::ONE.sign(), Sign::Positive);
/// assert_eq!(RBig::NEG_ONE.sign(), Sign::Negative);
/// ```
#[inline]
pub const fn sign(&self) -> Sign {
self.0.numerator.sign()
}
/// A number representing the sign of `self`.
///
/// * [RBig::ONE] if the number is positive (including `inf`)
/// * [RBig::ZERO] if the number is zero
/// * [RBig::NEG_ONE] if the number is negative (including `-inf`)
///
/// # Examples
///
/// ```
/// # use dashu_ratio::RBig;
///
/// let r = RBig::from_parts((-10).into(), 5u8.into());
/// assert_eq!(r.signum(), RBig::NEG_ONE);
/// ```
#[inline]
pub const fn signum(&self) -> Self {
RBig(Repr {
numerator: self.0.numerator.signum(),
denominator: UBig::ONE,
})
}
}
impl Relaxed {
/// Get the sign of the number. Zero value has a positive sign.
///
/// See [RBig::sign] for details.
#[inline]
pub const fn sign(&self) -> Sign {
self.0.numerator.sign()
}
/// A number representing the sign of `self`.
///
/// See [RBig::signum] for details.
#[inline]
pub const fn signum(&self) -> Self {
Relaxed(Repr {
numerator: self.0.numerator.signum(),
denominator: UBig::ONE,
})
}
}
impl Repr {
#[inline]
pub fn neg(mut self) -> Repr {
self.numerator = -self.numerator;
self
}
#[inline]
pub fn abs(mut self) -> Repr {
if self.numerator.sign() == Sign::Negative {
self.numerator = -self.numerator
}
self
}
}
impl Neg for RBig {
type Output = RBig;
#[inline]
fn neg(self) -> Self::Output {
RBig(self.0.neg())
}
}
impl Neg for &RBig {
type Output = RBig;
#[inline]
fn neg(self) -> Self::Output {
RBig(self.0.clone().neg())
}
}
impl Neg for Relaxed {
type Output = Relaxed;
#[inline]
fn neg(self) -> Self::Output {
Relaxed(self.0.neg())
}
}
impl Neg for &Relaxed {
type Output = Relaxed;
#[inline]
fn neg(self) -> Self::Output {
Relaxed(self.0.clone().neg())
}
}
impl Mul<Repr> for Sign {
type Output = Repr;
#[inline]
fn mul(self, mut rhs: Repr) -> Repr {
rhs.numerator *= self;
rhs
}
}
impl Mul<Sign> for Repr {
type Output = Repr;
#[inline]
fn mul(mut self, rhs: Sign) -> Repr {
self.numerator *= rhs;
self
}
}
impl Mul<Sign> for RBig {
type Output = RBig;
#[inline]
fn mul(mut self, rhs: Sign) -> RBig {
self.0.numerator *= rhs;
self
}
}
impl Mul<Sign> for Relaxed {
type Output = Relaxed;
#[inline]
fn mul(mut self, rhs: Sign) -> Self::Output {
self.0.numerator *= rhs;
self
}
}
impl Signed for RBig {
#[inline]
fn sign(&self) -> Sign {
self.0.numerator.sign()
}
}
impl Signed for Relaxed {
#[inline]
fn sign(&self) -> Sign {
self.0.numerator.sign()
}
}
impl Abs for Repr {
type Output = Self;
#[inline]
fn abs(self) -> Self::Output {
let Repr {
numerator,
denominator,
} = self;
Repr {
numerator: numerator.abs(),
denominator,
}
}
}
impl Abs for RBig {
type Output = Self;
#[inline]
fn abs(self) -> Self::Output {
RBig(self.0.abs())
}
}
impl Abs for Relaxed {
type Output = Self;
#[inline]
fn abs(self) -> Self::Output {
Relaxed(self.0.abs())
}
}