IP地址转化为二进制数

package main

import (
    "fmt"
    "strconv"
    "strings"
)

/* IP地址转化为二进制数 */
func main() {
    addrInt := ipAddrToInt("192.168.8.152")
    /* 十进制转化为二进制 */
    c := strconv.FormatInt(addrInt, 2)
    fmt.Println("c:", c)
    /* 二进制转化为十进制 */
    d, err := strconv.ParseInt(c, 2, 64)
    fmt.Println("d:", d, err)
}
func ipAddrToInt(ipAddr string) int64 {
    bits := strings.Split(ipAddr, ".")
    b0, _ := strconv.Atoi(bits[0])
    b1, _ := strconv.Atoi(bits[1])
    b2, _ := strconv.Atoi(bits[2])
    b3, _ := strconv.Atoi(bits[3])
    var sum int64
    sum += int64(b0) << 24
    sum += int64(b1) << 16
    sum += int64(b2) << 8
    sum += int64(b3)

    return sum
}