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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::integer::Integer;
use crate::integer_vector::IntegerVector;
use crate::natural_vector::NaturalVector;
use malachite_base::num::arithmetic::traits::{
Abs, AbsAssign, EntrywiseAbs, EntrywiseAbsAssign, EntrywiseUnsignedAbs, UnsignedAbs,
};
impl EntrywiseAbs for IntegerVector {
type Output = Self;
/// Replaces every element of an [`IntegerVector`] by its absolute value, taking the vector by
/// value.
///
/// The dimension is unchanged. This is not [`Abs`], which for a vector would be its Euclidean
/// length. For the result as a [`NaturalVector`], use [`EntrywiseUnsignedAbs`].
///
/// $$
/// f(v) = (|v_0|, |v_1|, \ldots, |v_{n-1}|).
/// $$
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(1)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseAbs;
/// use malachite_nz::integer_vector::IntegerVector;
///
/// let v = IntegerVector::from_str("(1, -2, 0, -3)").unwrap();
/// assert_eq!(v.clone().entrywise_abs().to_string(), "(1, 2, 0, 3)");
/// ```
///
/// This is equivalent to `_fmpz_vec_scalar_abs` from `fmpz_vec/scalar.c`, FLINT 3.6.0.
#[inline]
fn entrywise_abs(mut self) -> Self {
self.entrywise_abs_assign();
self
}
}
impl EntrywiseAbs for &IntegerVector {
type Output = IntegerVector;
/// Replaces every element of an [`IntegerVector`] by its absolute value, taking the vector by
/// reference.
///
/// See the documentation for the [`EntrywiseAbs`] implementation on [`IntegerVector`] that
/// takes the vector by value for details.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(n)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseAbs;
/// use malachite_nz::integer_vector::IntegerVector;
///
/// let v = IntegerVector::from_str("(1, -2, 0, -3)").unwrap();
/// assert_eq!((&v).entrywise_abs().to_string(), "(1, 2, 0, 3)");
/// ```
///
/// This is equivalent to `_fmpz_vec_scalar_abs` from `fmpz_vec/scalar.c`, FLINT 3.6.0.
fn entrywise_abs(self) -> IntegerVector {
IntegerVector {
elements: self.elements.iter().map(Abs::abs).collect(),
}
}
}
impl EntrywiseAbsAssign for IntegerVector {
/// Replaces every element of an [`IntegerVector`] by its absolute value, in place.
///
/// See the documentation for the [`EntrywiseAbs`] implementation on [`IntegerVector`] that
/// takes the vector by value for details.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(1)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseAbsAssign;
/// use malachite_nz::integer_vector::IntegerVector;
///
/// let mut v = IntegerVector::from_str("(1, -2, 0, -3)").unwrap();
/// v.entrywise_abs_assign();
/// assert_eq!(v.to_string(), "(1, 2, 0, 3)");
/// ```
///
/// This is equivalent to `_fmpz_vec_scalar_abs` from `fmpz_vec/scalar.c`, FLINT 3.6.0, with
/// `vec1` equal to `vec2`.
fn entrywise_abs_assign(&mut self) {
for x in &mut self.elements {
x.abs_assign();
}
}
}
impl EntrywiseUnsignedAbs for IntegerVector {
type Output = NaturalVector;
/// Replaces every element of an [`IntegerVector`] by its absolute value, returning the result
/// as a [`NaturalVector`] and taking the vector by value.
///
/// Every absolute value is non-negative, so the result fits in a [`NaturalVector`], as
/// [`UnsignedAbs`] gives a [`Natural`](crate::natural::Natural) for a single [`Integer`]. The
/// dimension is unchanged.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(1)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseUnsignedAbs;
/// use malachite_nz::integer_vector::IntegerVector;
///
/// let v = IntegerVector::from_str("(1, -2, 0, -3)").unwrap();
/// assert_eq!(
/// v.clone().entrywise_unsigned_abs().to_string(),
/// "(1, 2, 0, 3)"
/// );
/// ```
fn entrywise_unsigned_abs(self) -> NaturalVector {
NaturalVector {
elements: self
.elements
.into_iter()
.map(Integer::unsigned_abs)
.collect(),
}
}
}
impl EntrywiseUnsignedAbs for &IntegerVector {
type Output = NaturalVector;
/// Replaces every element of an [`IntegerVector`] by its absolute value, returning the result
/// as a [`NaturalVector`] and taking the vector by reference.
///
/// See the documentation for the [`EntrywiseUnsignedAbs`] implementation on [`IntegerVector`]
/// that takes the vector by value for details.
///
/// # Worst-case complexity
/// $T(n) = O(n)$
///
/// $M(n) = O(n)$
///
/// where $T$ is time, $M$ is additional memory, and $n$ is the total number of bits of the
/// elements.
///
/// # Examples
/// ```
/// use core::str::FromStr;
/// use malachite_base::num::arithmetic::traits::EntrywiseUnsignedAbs;
/// use malachite_nz::integer_vector::IntegerVector;
///
/// let v = IntegerVector::from_str("(1, -2, 0, -3)").unwrap();
/// assert_eq!((&v).entrywise_unsigned_abs().to_string(), "(1, 2, 0, 3)");
/// ```
fn entrywise_unsigned_abs(self) -> NaturalVector {
NaturalVector {
elements: self
.elements
.iter()
.map(UnsignedAbs::unsigned_abs)
.collect(),
}
}
}