// Copyright 2011 The LevelDB-Go and Pebble Authors. All rights reserved. Use
// of this source code is governed by a BSD-style license that can be found in
// the LICENSE file.

package pebble

import (
	"fmt"
	"log"
	"os"
)

// Logger defines an interface for writing log messages.
type Logger interface {
	Infof(format string, args ...interface{})
	Fatalf(format string, args ...interface{})
}

type defaultLogger struct{}

// DefaultLogger logs to the Go stdlib logs.
var DefaultLogger defaultLogger

// Infof implements the Logger.Infof interface.
func (defaultLogger) Infof(format string, args ...interface{}) {
	_ = log.Output(2, fmt.Sprintf(format, args...))
}

// Fatalf implements the Logger.Fatalf interface.
func (defaultLogger) Fatalf(format string, args ...interface{}) {
	_ = log.Output(2, fmt.Sprintf(format, args...))
	os.Exit(1)
}