next_rotate_time

# File lib/logger.rb, line 534
    def next_rotate_time(now, shift_age)
      case shift_age
      when /^daily$/
        t = Time.mktime(now.year, now.month, now.mday) + SiD
      when /^weekly$/
        t = Time.mktime(now.year, now.month, now.mday) + SiD * (7 - now.wday)
      when /^monthly$/
        t = Time.mktime(now.year, now.month, 1) + SiD * 32
        mday = 1
      else
        return now
      end
      if mday or t.hour.nonzero? or t.min.nonzero? or t.sec.nonzero?
        t = Time.mktime(t.year, t.month, mday || (t.mday + (t.hour > 12 ? 1 : 0)))
      end
      t
    end