| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- A D A . C A L E N D A R . A R I T H M E T I C -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2006-2009, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| package body Ada.Calendar.Arithmetic is |
| |
| -------------------------- |
| -- Implementation Notes -- |
| -------------------------- |
| |
| -- All operations in this package are target and time representation |
| -- independent, thus only one source file is needed for multiple targets. |
| |
| --------- |
| -- "+" -- |
| --------- |
| |
| function "+" (Left : Time; Right : Day_Count) return Time is |
| R : constant Long_Integer := Long_Integer (Right); |
| begin |
| return Arithmetic_Operations.Add (Left, R); |
| end "+"; |
| |
| function "+" (Left : Day_Count; Right : Time) return Time is |
| L : constant Long_Integer := Long_Integer (Left); |
| begin |
| return Arithmetic_Operations.Add (Right, L); |
| end "+"; |
| |
| --------- |
| -- "-" -- |
| --------- |
| |
| function "-" (Left : Time; Right : Day_Count) return Time is |
| R : constant Long_Integer := Long_Integer (Right); |
| begin |
| return Arithmetic_Operations.Subtract (Left, R); |
| end "-"; |
| |
| function "-" (Left, Right : Time) return Day_Count is |
| Days : Long_Integer; |
| Seconds : Duration; |
| Leap_Seconds : Integer; |
| pragma Warnings (Off, Seconds); -- temporary ??? |
| pragma Warnings (Off, Leap_Seconds); -- temporary ??? |
| pragma Unreferenced (Seconds, Leap_Seconds); |
| begin |
| Arithmetic_Operations.Difference |
| (Left, Right, Days, Seconds, Leap_Seconds); |
| return Day_Count (Days); |
| end "-"; |
| |
| ---------------- |
| -- Difference -- |
| ---------------- |
| |
| procedure Difference |
| (Left : Time; |
| Right : Time; |
| Days : out Day_Count; |
| Seconds : out Duration; |
| Leap_Seconds : out Leap_Seconds_Count) |
| is |
| Op_Days : Long_Integer; |
| Op_Leaps : Integer; |
| begin |
| Arithmetic_Operations.Difference |
| (Left, Right, Op_Days, Seconds, Op_Leaps); |
| Days := Day_Count (Op_Days); |
| Leap_Seconds := Leap_Seconds_Count (Op_Leaps); |
| end Difference; |
| |
| end Ada.Calendar.Arithmetic; |
