94 lines
2.8 KiB
Go
94 lines
2.8 KiB
Go
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// Copyright (c) 2016 Uber Technologies, Inc.
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package utils
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import (
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"encoding/binary"
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"errors"
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"net"
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"strconv"
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"strings"
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"time"
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)
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var (
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// ErrEmptyIP an error for empty ip strings
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ErrEmptyIP = errors.New("empty string given for ip")
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// ErrNotHostColonPort an error for invalid host port string
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ErrNotHostColonPort = errors.New("expecting host:port")
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// ErrNotFourOctets an error for the wrong number of octets after splitting a string
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ErrNotFourOctets = errors.New("Wrong number of octets")
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)
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// ParseIPToUint32 converts a string ip (e.g. "x.y.z.w") to an uint32
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func ParseIPToUint32(ip string) (uint32, error) {
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if ip == "" {
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return 0, ErrEmptyIP
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}
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if ip == "localhost" {
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return 127<<24 | 1, nil
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}
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octets := strings.Split(ip, ".")
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if len(octets) != 4 {
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return 0, ErrNotFourOctets
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}
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var intIP uint32
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for i := 0; i < 4; i++ {
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octet, err := strconv.Atoi(octets[i])
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if err != nil {
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return 0, err
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}
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intIP = (intIP << 8) | uint32(octet)
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}
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return intIP, nil
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}
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// ParsePort converts port number from string to uin16
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func ParsePort(portString string) (uint16, error) {
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port, err := strconv.ParseUint(portString, 10, 16)
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return uint16(port), err
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}
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// PackIPAsUint32 packs an IPv4 as uint32
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func PackIPAsUint32(ip net.IP) uint32 {
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if ipv4 := ip.To4(); ipv4 != nil {
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return binary.BigEndian.Uint32(ipv4)
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}
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return 0
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}
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// TimeToMicrosecondsSinceEpochInt64 converts Go time.Time to a long
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// representing time since epoch in microseconds, which is used expected
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// in the Jaeger spans encoded as Thrift.
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func TimeToMicrosecondsSinceEpochInt64(t time.Time) int64 {
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// ^^^ Passing time.Time by value is faster than passing a pointer!
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// BenchmarkTimeByValue-8 2000000000 1.37 ns/op
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// BenchmarkTimeByPtr-8 2000000000 1.98 ns/op
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return t.UnixNano() / 1000
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}
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