# File webrick/log.rb, line 18
    def initialize(log_file=nil, level=nil)
      @level = level || INFO
      case log_file
      when String
        @log = open(log_file, "a+")
        @log.sync = true
        @opened = true
      when NilClass
        @log = $stderr
      else
        @log = log_file  # requires "<<". (see BasicLog#log)
      end
    end

# File webrick/log.rb, line 44
    def <<(obj)
      log(INFO, obj.to_s)
    end

# File webrick/log.rb, line 32
    def close
      @log.close if @opened
      @log = nil
    end

# File webrick/log.rb, line 52
    def debug(msg) log(DEBUG, "DEBUG " << format(msg)); end

# File webrick/log.rb, line 58
    def debug?; @level >= DEBUG; end

# File webrick/log.rb, line 49
    def error(msg) log(ERROR, "ERROR " << format(msg)); end

# File webrick/log.rb, line 55
    def error?; @level >= ERROR; end

# File webrick/log.rb, line 48
    def fatal(msg) log(FATAL, "FATAL " << format(msg)); end

# File webrick/log.rb, line 54
    def fatal?; @level >= FATAL; end

# File webrick/log.rb, line 51
    def info(msg)  log(INFO,  "INFO  " << format(msg)); end

# File webrick/log.rb, line 57
    def info?;  @level >= INFO; end

# File webrick/log.rb, line 37
    def log(level, data)
      if @log && level <= @level
        data += "\n" if /\n\Z/ !~ data
        @log << data
      end
    end

# File webrick/log.rb, line 50
    def warn(msg)  log(WARN,  "WARN  " << format(msg)); end

# File webrick/log.rb, line 56
    def warn?;  @level >= WARN; end