wireguard-go/device/logger.go
Jason A. Donenfeld db0aa39b76 global: update header comments and modules
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-02 02:08:26 -06:00

60 lines
1 KiB
Go

/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2020 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"io"
"io/ioutil"
"log"
"os"
)
const (
LogLevelSilent = iota
LogLevelError
LogLevelInfo
LogLevelDebug
)
type Logger struct {
Debug *log.Logger
Info *log.Logger
Error *log.Logger
}
func NewLogger(level int, prepend string) *Logger {
output := os.Stdout
logger := new(Logger)
logErr, logInfo, logDebug := func() (io.Writer, io.Writer, io.Writer) {
if level >= LogLevelDebug {
return output, output, output
}
if level >= LogLevelInfo {
return output, output, ioutil.Discard
}
if level >= LogLevelError {
return output, ioutil.Discard, ioutil.Discard
}
return ioutil.Discard, ioutil.Discard, ioutil.Discard
}()
logger.Debug = log.New(logDebug,
"DEBUG: "+prepend,
log.Ldate|log.Ltime,
)
logger.Info = log.New(logInfo,
"INFO: "+prepend,
log.Ldate|log.Ltime,
)
logger.Error = log.New(logErr,
"ERROR: "+prepend,
log.Ldate|log.Ltime,
)
return logger
}