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Optimise contains for IPv4

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Abhishek Chanda
2019-02-02 23:57:25 +00:00
parent 2b9936fa8e
commit 1b06452e88
1 changed files with 2 additions and 2 deletions
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4
src/ipv4.rs
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@ -131,8 +131,8 @@ impl Ipv4Network {
/// assert!(!net.contains(Ipv4Addr::new(127, 0, 1, 70))); /// assert!(!net.contains(Ipv4Addr::new(127, 0, 1, 70)));
/// ``` /// ```
pub fn contains(&self, ip: Ipv4Addr) -> bool { pub fn contains(&self, ip: Ipv4Addr) -> bool {
let net = u32::from(self.network()); let mask = !(0xffff_ffff as u64 >> self.prefix) as u32;
let mask = u32::from(self.mask()); let net = u32::from(self.addr) & mask;
(u32::from(ip) & mask) == net (u32::from(ip) & mask) == net
} }