60 lines
1 KiB
Go
60 lines
1 KiB
Go
/* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
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*/
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package device
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import (
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"io"
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"io/ioutil"
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"log"
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"os"
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)
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const (
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LogLevelSilent = iota
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LogLevelError
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LogLevelInfo
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LogLevelDebug
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)
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type Logger struct {
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Debug *log.Logger
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Info *log.Logger
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Error *log.Logger
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}
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func NewLogger(level int, prepend string) *Logger {
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output := os.Stdout
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logger := new(Logger)
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logErr, logInfo, logDebug := func() (io.Writer, io.Writer, io.Writer) {
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if level >= LogLevelDebug {
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return output, output, output
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}
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if level >= LogLevelInfo {
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return output, output, ioutil.Discard
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}
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if level >= LogLevelError {
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return output, ioutil.Discard, ioutil.Discard
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}
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return ioutil.Discard, ioutil.Discard, ioutil.Discard
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}()
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logger.Debug = log.New(logDebug,
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"DEBUG: "+prepend,
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log.Ldate|log.Ltime,
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)
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logger.Info = log.New(logInfo,
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"INFO: "+prepend,
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log.Ldate|log.Ltime,
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)
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logger.Error = log.New(logErr,
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"ERROR: "+prepend,
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log.Ldate|log.Ltime,
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)
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return logger
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}
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