Files
cryptonum/src/signed/compare.rs

61 lines
2.1 KiB
Rust

macro_rules! cmp_impls {
($name: ident) => {
impl PartialOrd for $name {
fn partial_cmp(&self, rhs: &$name) -> Option<Ordering> {
Some(self.cmp(&rhs))
}
}
impl Ord for $name {
fn cmp(&self, rhs: &$name) -> Ordering {
match (self.negative, rhs.negative) {
(false, false) => self.value.cmp(&rhs.value),
(true, false) => Ordering::Less,
(false, true) => Ordering::Greater,
(true, true) => self.value.cmp(&rhs.value).reverse()
}
}
}
}
}
#[cfg(test)]
macro_rules! generate_sigcmp_tests {
($sname: ident, $name: ident, $lname: ident) => {
#[test]
fn $lname() {
generate_sigcmp_tests!(body $sname, $name, $lname);
}
};
(ignore $sname: ident, $name: ident, $lname: ident) => {
#[test]
#[ignore]
fn $lname() {
generate_sigcmp_tests!(body $sname, $name, $lname);
}
};
(body $sname: ident, $name: ident, $lname: ident) => {
let fname = format!("testdata/sigcmp/{}.tests", stringify!($sname));
run_test(fname.to_string(), 5, |case| {
let (nega, abytes) = case.get("a").unwrap();
let (negb, bbytes) = case.get("b").unwrap();
let (neg2, ebytes) = case.get("e").unwrap();
let (neg3, gbytes) = case.get("g").unwrap();
let (neg4, lbytes) = case.get("l").unwrap();
assert!(!neg2 && !neg3 && !neg4);
let a = $sname::new(*nega, $name::from_bytes(abytes));
let b = $sname::new(*negb, $name::from_bytes(bbytes));
let e = 1 == ebytes[0];
let g = 1 == gbytes[0];
let l = 1 == lbytes[0];
assert_eq!(e, a == b, "equals wrong");
assert_eq!(g, a > b, "greater than wrong");
assert_eq!(l, a < b, "less than wrong");
assert_eq!(e || g, a >= b, "greater / equals wrong");
assert_eq!(e || l, a <= b, "less than / equals wrong");
});
};
}