1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- A D A . C A L E N D A R . A R I T H M E T I C -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 2006-2009, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32package body Ada.Calendar.Arithmetic is 33 34 -------------------------- 35 -- Implementation Notes -- 36 -------------------------- 37 38 -- All operations in this package are target and time representation 39 -- independent, thus only one source file is needed for multiple targets. 40 41 --------- 42 -- "+" -- 43 --------- 44 45 function "+" (Left : Time; Right : Day_Count) return Time is 46 R : constant Long_Integer := Long_Integer (Right); 47 begin 48 return Arithmetic_Operations.Add (Left, R); 49 end "+"; 50 51 function "+" (Left : Day_Count; Right : Time) return Time is 52 L : constant Long_Integer := Long_Integer (Left); 53 begin 54 return Arithmetic_Operations.Add (Right, L); 55 end "+"; 56 57 --------- 58 -- "-" -- 59 --------- 60 61 function "-" (Left : Time; Right : Day_Count) return Time is 62 R : constant Long_Integer := Long_Integer (Right); 63 begin 64 return Arithmetic_Operations.Subtract (Left, R); 65 end "-"; 66 67 function "-" (Left, Right : Time) return Day_Count is 68 Days : Long_Integer; 69 Seconds : Duration; 70 Leap_Seconds : Integer; 71 pragma Warnings (Off, Seconds); -- temporary ??? 72 pragma Warnings (Off, Leap_Seconds); -- temporary ??? 73 pragma Unreferenced (Seconds, Leap_Seconds); 74 begin 75 Arithmetic_Operations.Difference 76 (Left, Right, Days, Seconds, Leap_Seconds); 77 return Day_Count (Days); 78 end "-"; 79 80 ---------------- 81 -- Difference -- 82 ---------------- 83 84 procedure Difference 85 (Left : Time; 86 Right : Time; 87 Days : out Day_Count; 88 Seconds : out Duration; 89 Leap_Seconds : out Leap_Seconds_Count) 90 is 91 Op_Days : Long_Integer; 92 Op_Leaps : Integer; 93 begin 94 Arithmetic_Operations.Difference 95 (Left, Right, Op_Days, Seconds, Op_Leaps); 96 Days := Day_Count (Op_Days); 97 Leap_Seconds := Leap_Seconds_Count (Op_Leaps); 98 end Difference; 99 100end Ada.Calendar.Arithmetic; 101