forked from ECSTeam/cloudfoundry-top-plugin
/
formatIp.go
37 lines (33 loc) · 1.11 KB
/
formatIp.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
// Copyright (c) 2016 ECS Team, Inc. - All Rights Reserved
// https://github.com/ECSTeam/cloudfoundry-top-plugin
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"hash/fnv"
"net"
)
func Ip2long(s string) (ret uint32) {
bip := ([]byte)(net.ParseIP(s).To4())
if len(bip) != 4 {
// We don't have a IPv4 so give it a hash so at least we have a predictable sort order
return uint32(hash(s))
}
val := (uint32)(bip[0])*(1<<24) + (uint32)(bip[1])*(1<<16) + (uint32)(bip[2])*(1<<8) + (uint32)(bip[3])
return val
}
func hash(s string) uint32 {
h := fnv.New32a()
h.Write([]byte(s))
return h.Sum32()
}