mirror of https://github.com/tidwall/tile38.git
112 lines
2.5 KiB
Go
112 lines
2.5 KiB
Go
// Copyright 2012-2018 The NATS Authors
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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 server
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import (
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"errors"
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"fmt"
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"net"
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"strconv"
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"strings"
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"time"
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"github.com/nats-io/nuid"
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)
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// Use nuid.
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func genID() string {
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return nuid.Next()
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}
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// Ascii numbers 0-9
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const (
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asciiZero = 48
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asciiNine = 57
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)
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// parseSize expects decimal positive numbers. We
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// return -1 to signal error.
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func parseSize(d []byte) (n int) {
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l := len(d)
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if l == 0 {
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return -1
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}
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var (
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i int
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dec byte
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)
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// Note: Use `goto` here to avoid for loop in order
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// to have the function be inlined.
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// See: https://github.com/golang/go/issues/14768
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loop:
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dec = d[i]
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if dec < asciiZero || dec > asciiNine {
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return -1
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}
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n = n*10 + (int(dec) - asciiZero)
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i++
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if i < l {
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goto loop
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}
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return n
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}
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// parseInt64 expects decimal positive numbers. We
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// return -1 to signal error
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func parseInt64(d []byte) (n int64) {
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if len(d) == 0 {
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return -1
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}
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for _, dec := range d {
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if dec < asciiZero || dec > asciiNine {
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return -1
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}
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n = n*10 + (int64(dec) - asciiZero)
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}
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return n
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}
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// Helper to move from float seconds to time.Duration
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func secondsToDuration(seconds float64) time.Duration {
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ttl := seconds * float64(time.Second)
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return time.Duration(ttl)
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}
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// Parse a host/port string with a default port to use
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// if none (or 0 or -1) is specified in `hostPort` string.
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func parseHostPort(hostPort string, defaultPort int) (host string, port int, err error) {
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if hostPort != "" {
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host, sPort, err := net.SplitHostPort(hostPort)
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switch err.(type) {
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case *net.AddrError:
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// try appending the current port
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host, sPort, err = net.SplitHostPort(fmt.Sprintf("%s:%d", hostPort, defaultPort))
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}
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if err != nil {
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return "", -1, err
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}
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port, err = strconv.Atoi(strings.TrimSpace(sPort))
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if err != nil {
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return "", -1, err
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}
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if port == 0 || port == -1 {
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port = defaultPort
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}
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return strings.TrimSpace(host), port, nil
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}
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return "", -1, errors.New("No hostport specified")
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}
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