123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687 |
- // Copyright (c) 2017 Uber Technologies, Inc.
- //
- // 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 utils
- import (
- "encoding/binary"
- "errors"
- "net"
- "strconv"
- "strings"
- "time"
- )
- var (
- // ErrEmptyIP an error for empty ip strings
- ErrEmptyIP = errors.New("empty string given for ip")
- // ErrNotHostColonPort an error for invalid host port string
- ErrNotHostColonPort = errors.New("expecting host:port")
- // ErrNotFourOctets an error for the wrong number of octets after splitting a string
- ErrNotFourOctets = errors.New("Wrong number of octets")
- )
- // ParseIPToUint32 converts a string ip (e.g. "x.y.z.w") to an uint32
- func ParseIPToUint32(ip string) (uint32, error) {
- if ip == "" {
- return 0, ErrEmptyIP
- }
- if ip == "localhost" {
- return 127<<24 | 1, nil
- }
- octets := strings.Split(ip, ".")
- if len(octets) != 4 {
- return 0, ErrNotFourOctets
- }
- var intIP uint32
- for i := 0; i < 4; i++ {
- octet, err := strconv.Atoi(octets[i])
- if err != nil {
- return 0, err
- }
- intIP = (intIP << 8) | uint32(octet)
- }
- return intIP, nil
- }
- // ParsePort converts port number from string to uin16
- func ParsePort(portString string) (uint16, error) {
- port, err := strconv.ParseUint(portString, 10, 16)
- return uint16(port), err
- }
- // PackIPAsUint32 packs an IPv4 as uint32
- func PackIPAsUint32(ip net.IP) uint32 {
- if ipv4 := ip.To4(); ipv4 != nil {
- return binary.BigEndian.Uint32(ipv4)
- }
- return 0
- }
- // TimeToMicrosecondsSinceEpochInt64 converts Go time.Time to a long
- // representing time since epoch in microseconds, which is used expected
- // in the Jaeger spans encoded as Thrift.
- func TimeToMicrosecondsSinceEpochInt64(t time.Time) int64 {
- // ^^^ Passing time.Time by value is faster than passing a pointer!
- // BenchmarkTimeByValue-8 2000000000 1.37 ns/op
- // BenchmarkTimeByPtr-8 2000000000 1.98 ns/op
- return t.UnixNano() / 1000
- }
|