前端之家收集整理的这篇文章主要介绍了
Go语言把IP转为int存储.节省空间提高索引速度，
前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
package main
import (
"errors"
"fmt"
"strconv"
"strings"
)
type IntIP struct {
IP string
Intip int
}
func main() {
var x *IntIP = &IntIP{IP: "192.168.1.1"}
fmt.Println(x)
x.ToIntIp()
fmt.Println(*x)
}
func (self *IntIP) String() string {
return self.IP
}
func (self *IntIP) ToIntIp() (int,error) {
Intip,err := ConvertToIntIP(self.IP)
if err != nil {
return 0,err
}
self.Intip = Intip
return Intip,nil
}
func (self *IntIP) ToString() (string,error) {
i4 := self.Intip & 255
i3 := self.Intip >> 8 & 255
i2 := self.Intip >> 16 & 255
i1 := self.Intip >> 24 & 255
if i1 > 255 || i2 > 255 || i3 > 255 || i4 > 255 {
return "",errors.New("Isn't a IntIP Type.")
}
ipstring := fmt.Sprintf("%d.%d.%d.%d",i4,i3,i2,i1)
self.IP = ipstring
return ipstring,nil
}
func ConvertToIntIP(ip string) (int,error) {
ips := strings.Split(ip,".")
E := errors.New("Not A IP.")
if len(ips) != 4 {
return 0,E
}
var intIP int
for k,v := range ips {
i,err := strconv.Atoi(v)
if err != nil || i > 255 {
return 0,E
}
intIP = intIP | i<<uint(8*(3-k))
}
return intIP,nil
}
