mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-18 19:44:06 -08:00
88 lines
2.3 KiB
Go
88 lines
2.3 KiB
Go
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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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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