Sortable HardwareAddr Golang

hwaddr.go

type HwAddrSlice []net.HardwareAddr

func (s HwAddrSlice) Len() int {
	return len(s)
}

func (s HwAddrSlice) Swap(i, j int) {
	s[i], s[j] = s[j], s[i]
}

// Less sorts hardware addresses in a way that longer (EUI-48/64 or Infiniband) comes first and
// addresses of the same length are sorted by alphabetical (hex) order.
func (s HwAddrSlice) Less(i, j int) bool {
	if len(s[i]) > len(s[j]) {
		return true
	}
	for k := len(s[i]) - 1; k >= 0; k-- {
		if s[i][k] > s[j][k] {
			return false
		}
	}
	return true
}