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use {Assign, Integer, Rational};
use big_rational::make_string;
use gmp_mpfr_sys::gmp;
use inner::{Inner, InnerMut};
use rational::{ParseRationalError, ValidRational};
use std::cmp::Ordering;
use std::fmt::{self, Binary, Debug, Display, Formatter, LowerHex, Octal,
UpperHex};
use std::hash::{Hash, Hasher};
use std::i32;
use std::mem;
use std::ptr;
use std::str::FromStr;
impl Default for Rational {
#[inline]
fn default() -> Rational {
Rational::new()
}
}
impl Clone for Rational {
#[inline]
fn clone(&self) -> Rational {
let mut ret = Rational::new();
ret.assign(self);
ret
}
#[inline]
fn clone_from(&mut self, source: &Rational) {
self.assign(source);
}
}
impl Drop for Rational {
#[inline]
fn drop(&mut self) {
unsafe {
gmp::mpq_clear(self.inner_mut());
}
}
}
impl Hash for Rational {
fn hash<H: Hasher>(&self, state: &mut H) {
let (num, den) = self.as_numer_denom();
num.hash(state);
den.hash(state);
}
}
from_borrow! { &'a Rational => Rational }
impl<Num> From<Num> for Rational
where
Integer: From<Num>,
{
#[inline]
fn from(num: Num) -> Rational {
let num = Integer::from(num);
let den = <Integer as From<u32>>::from(1);
let mut dst: Rational = unsafe { mem::uninitialized() };
unsafe {
let num_den = dst.as_mut_numer_denom_no_canonicalization();
ptr::copy_nonoverlapping(&num, num_den.0, 1);
ptr::copy_nonoverlapping(&den, num_den.1, 1);
}
mem::forget(num);
mem::forget(den);
dst
}
}
impl<Num, Den> From<(Num, Den)> for Rational
where
Integer: From<Num> + From<Den>,
{
#[inline]
fn from((num, den): (Num, Den)) -> Rational {
let den = Integer::from(den);
assert_ne!(den.cmp0(), Ordering::Equal, "division by zero");
let num = Integer::from(num);
let mut dst: Rational = unsafe { mem::uninitialized() };
unsafe {
let mut num_den = dst.as_mut_numer_denom();
ptr::copy_nonoverlapping(&num, num_den.num(), 1);
ptr::copy_nonoverlapping(&den, num_den.den(), 1);
}
mem::forget(num);
mem::forget(den);
dst
}
}
impl FromStr for Rational {
type Err = ParseRationalError;
#[inline]
fn from_str(src: &str) -> Result<Rational, ParseRationalError> {
let mut r = Rational::new();
r.assign_str(src)?;
Ok(r)
}
}
impl Display for Rational {
#[inline]
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
fmt_radix(self, f, 10, false, "")
}
}
impl Debug for Rational {
#[inline]
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
fmt_radix(self, f, 10, false, "")
}
}
impl Binary for Rational {
#[inline]
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
fmt_radix(self, f, 2, false, "0b")
}
}
impl Octal for Rational {
#[inline]
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
fmt_radix(self, f, 8, false, "0o")
}
}
impl LowerHex for Rational {
#[inline]
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
fmt_radix(self, f, 16, false, "0x")
}
}
impl UpperHex for Rational {
#[inline]
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
fmt_radix(self, f, 16, true, "0x")
}
}
impl Assign for Rational {
#[inline]
fn assign(&mut self, mut other: Rational) {
mem::swap(self, &mut other);
}
}
impl<'a> Assign<&'a Rational> for Rational {
#[inline]
fn assign(&mut self, other: &'a Rational) {
unsafe {
gmp::mpq_set(self.inner_mut(), other.inner());
}
}
}
impl<Num> Assign<Num> for Rational
where
Integer: Assign<Num>,
{
#[inline]
fn assign(&mut self, rhs: Num) {
let num_den = unsafe { self.as_mut_numer_denom_no_canonicalization() };
num_den.0.assign(rhs);
<Integer as Assign<u32>>::assign(num_den.1, 1);
}
}
impl<Num, Den> Assign<(Num, Den)> for Rational
where
Integer: Assign<Num> + Assign<Den>,
{
#[inline]
fn assign(&mut self, rhs: (Num, Den)) {
let mut num_den = self.as_mut_numer_denom();
num_den.num().assign(rhs.0);
num_den.den().assign(rhs.1);
}
}
impl<'a, Num, Den> Assign<&'a (Num, Den)> for Rational
where
Integer: Assign<&'a Num> + Assign<&'a Den>,
{
#[inline]
fn assign(&mut self, rhs: &'a (Num, Den)) {
let mut num_den = self.as_mut_numer_denom();
num_den.num().assign(&rhs.0);
num_den.den().assign(&rhs.1);
}
}
fn fmt_radix(
r: &Rational,
f: &mut Formatter,
radix: i32,
to_upper: bool,
prefix: &str,
) -> fmt::Result {
let s = make_string(r, radix, to_upper);
let (neg, buf) = if s.starts_with('-') {
(true, &s[1..])
} else {
(false, &s[..])
};
f.pad_integral(!neg, prefix, buf)
}
from_borrow! { ValidRational<'a> => Rational }
impl Display for ParseRationalError {
#[inline]
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
Debug::fmt(self, f)
}
}
unsafe impl Send for Rational {}
unsafe impl Sync for Rational {}