fn partial_cmp()

in amazon-qldb-driver-core/src/qldb_hash.rs [40:65]

• 19 lines of code
• 5 McCabe index (conditional complexity)

    fn partial_cmp(&self, other: &QldbHash) -> Option<Ordering> {
        if self.is_empty() {
            if other.is_empty() {
                return Some(Ordering::Equal);
            } else {
                return Some(Ordering::Less);
            }
        }

        if other.is_empty() {
            return Some(Ordering::Greater);
        }

        for (x, y) in self.bytes.iter().rev().zip(other.bytes.iter().rev()) {
            // Note that Java compares bytes as signed integers. We
            // store the bytes as unsigned bytes everywhere and simply
            // re-interpret the bits at this point to determine
            // ordering.
            match (*x as i8).cmp(&(*y as i8)) {
                Ordering::Equal => {}
                cmp => return Some(cmp),
            }
        }

        return Some(Ordering::Equal);
    }