text: // Copyright 2015 CoreOS, Inc.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  package capnslog
  
  import (
  	"fmt"
  	"os"
  )
  
  type PackageLogger struct {
  	pkg   string
  	level LogLevel
  }
  
  const calldepth = 2
  
  func (p *PackageLogger) internalLog(depth int, inLevel LogLevel, entries ...interface{}) {
  	logger.Lock()
  	defer logger.Unlock()
  	if inLevel != CRITICAL && p.level < inLevel {
  		return
  	}
  	if logger.formatter != nil {
  		logger.formatter.Format(p.pkg, inLevel, depth+1, entries...)
  	}
  }
  
  func (p *PackageLogger) LevelAt(l LogLevel) bool {
  	logger.Lock()
  	defer logger.Unlock()
  	return p.level >= l
  }
  
  // Log a formatted string at any level between ERROR and TRACE
  func (p *PackageLogger) Logf(l LogLevel, format string, args ...interface{}) {
  	p.internalLog(calldepth, l, fmt.Sprintf(format, args...))
  }
  
  // Log a message at any level between ERROR and TRACE
  func (p *PackageLogger) Log(l LogLevel, args ...interface{}) {
  	p.internalLog(calldepth, l, fmt.Sprint(args...))
  }
  
  // log stdlib compatibility
  
  func (p *PackageLogger) Println(args ...interface{}) {
  	p.internalLog(calldepth, INFO, fmt.Sprintln(args...))
  }
  
  func (p *PackageLogger) Printf(format string, args ...interface{}) {
  	p.Logf(INFO, format, args...)
  }
  
  func (p *PackageLogger) Print(args ...interface{}) {
  	p.internalLog(calldepth, INFO, fmt.Sprint(args...))
  }
  
  // Panic and fatal
  
  func (p *PackageLogger) Panicf(format string, args ...interface{}) {
  	s := fmt.Sprintf(format, args...)
  	p.internalLog(calldepth, CRITICAL, s)
  	panic(s)
  }
  
  func (p *PackageLogger) Panic(args ...interface{}) {
  	s := fmt.Sprint(args...)
  	p.internalLog(calldepth, CRITICAL, s)
  	panic(s)
  }
  
  func (p *PackageLogger) Fatalf(format string, args ...interface{}) {
  	p.Logf(CRITICAL, format, args...)
  	os.Exit(1)
  }
  
  func (p *PackageLogger) Fatal(args ...interface{}) {
  	s := fmt.Sprint(args...)
  	p.internalLog(calldepth, CRITICAL, s)
  	os.Exit(1)
  }
  
  func (p *PackageLogger) Fatalln(args ...interface{}) {
  	s := fmt.Sprintln(args...)
  	p.internalLog(calldepth, CRITICAL, s)
  	os.Exit(1)
  }
  
  // Error Functions
  
  func (p *PackageLogger) Errorf(format string, args ...interface{}) {
  	p.Logf(ERROR, format, args...)
  }
  
  func (p *PackageLogger) Error(entries ...interface{}) {
  	p.internalLog(calldepth, ERROR, entries...)
  }
  
  // Warning Functions
  
  func (p *PackageLogger) Warningf(format string, args ...interface{}) {
  	p.Logf(WARNING, format, args...)
  }
  
  func (p *PackageLogger) Warning(entries ...interface{}) {
  	p.internalLog(calldepth, WARNING, entries...)
  }
  
  // Notice Functions
  
  func (p *PackageLogger) Noticef(format string, args ...interface{}) {
  	p.Logf(NOTICE, format, args...)
  }
  
  func (p *PackageLogger) Notice(entries ...interface{}) {
  	p.internalLog(calldepth, NOTICE, entries...)
  }
  
  // Info Functions
  
  func (p *PackageLogger) Infof(format string, args ...interface{}) {
  	p.Logf(INFO, format, args...)
  }
  
  func (p *PackageLogger) Info(entries ...interface{}) {
  	p.internalLog(calldepth, INFO, entries...)
  }
  
  // Debug Functions
  
  func (p *PackageLogger) Debugf(format string, args ...interface{}) {
  	if p.level < DEBUG {
  		return
  	}
  	p.Logf(DEBUG, format, args...)
  }
  
  func (p *PackageLogger) Debug(entries ...interface{}) {
  	if p.level < DEBUG {
  		return
  	}
  	p.internalLog(calldepth, DEBUG, entries...)
  }
  
  // Trace Functions
  
  func (p *PackageLogger) Tracef(format string, args ...interface{}) {
  	if p.level < TRACE {
  		return
  	}
  	p.Logf(TRACE, format, args...)
  }
  
  func (p *PackageLogger) Trace(entries ...interface{}) {
  	if p.level < TRACE {
  		return
  	}
  	p.internalLog(calldepth, TRACE, entries...)
  }
  
  func (p *PackageLogger) Flush() {
  	logger.Lock()
  	defer logger.Unlock()
  	logger.formatter.Flush()
  }
  