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