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use crate::U256;
use core::cmp::Ordering;
impl Ord for U256 {
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
match self.high().cmp(other.high()) {
Ordering::Equal => self.low().cmp(other.low()),
ordering => ordering,
}
}
}
impl PartialOrd for U256 {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl PartialEq<u128> for U256 {
#[inline]
fn eq(&self, other: &u128) -> bool {
*self.high() == 0 && self.low() == other
}
}
impl PartialOrd<u128> for U256 {
#[inline]
fn partial_cmp(&self, rhs: &u128) -> Option<Ordering> {
Some(if *self.high() == 0 {
self.low().cmp(rhs)
} else {
Ordering::Greater
})
}
}
#[cfg(test)]
mod tests {
use crate::U256;
use core::cmp::Ordering;
#[test]
fn cmp() {
let x = U256::from_words(0, 100000000000000000000000000000000000000);
let y = U256::from_words(2938735877, 18960114910927365649471927446130393088);
assert!(x < y);
assert_eq!(x.cmp(&y), Ordering::Less);
}
}