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documented order of conversion between u32 an ipv4addr #40590

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Merged
merged 1 commit into from Mar 19, 2017
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documented order of conversion between u32 an ipv4addr #40590

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2 changes: 2 additions & 0 deletions src/libstd/net/ip.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -636,6 +636,7 @@ impl FromInner<c::in_addr> for Ipv4Addr {

#[stable(feature = "ip_u32", since = "1.1.0")]
impl From<Ipv4Addr> for u32 {
/// It performs the conversion in network order (big-endian).
fn from(ip: Ipv4Addr) -> u32 {
let ip = ip.octets();
((ip[0] as u32) << 24) + ((ip[1] as u32) << 16) + ((ip[2] as u32) << 8) + (ip[3] as u32)
Expand All @@ -644,6 +645,7 @@ impl From<Ipv4Addr> for u32 {

#[stable(feature = "ip_u32", since = "1.1.0")]
impl From<u32> for Ipv4Addr {
/// It performs the conversion in network order (big-endian).
fn from(ip: u32) -> Ipv4Addr {
Ipv4Addr::new((ip >> 24) as u8, (ip >> 16) as u8, (ip >> 8) as u8, ip as u8)
}
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