------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
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------------------------------------------------------------------------------

package Ada.Calendar.Arithmetic is

   --  Arithmetic on days:

   type Day_Count is range
     -(366 * (1 + Year_Number'Last - Year_Number'First))
        ..
     +(366 * (1 + Year_Number'Last - Year_Number'First));

   subtype Leap_Seconds_Count is Integer range -2047 .. 2047;

   procedure Difference
     (Left, Right  : Time;
      Days         : out Day_Count;
      Seconds      : out Duration;
      Leap_Seconds : out Leap_Seconds_Count);

   function "+" (Left : Time; Right : Day_Count) return Time;
   function "+" (Left : Day_Count; Right : Time) return Time;
   function "-" (Left : Time; Right : Day_Count) return Time;
   function "-" (Left, Right : Time) return Day_Count;

end Ada.Calendar.Arithmetic;