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+-- C3900060.A
+--
+-- Grant of Unlimited Rights
+--
+-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
+-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
+-- unlimited rights in the software and documentation contained herein.
+-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
+-- this public release, the Government intends to confer upon all
+-- recipients unlimited rights equal to those held by the Government.
+-- These rights include rights to use, duplicate, release or disclose the
+-- released technical data and computer software in whole or in part, in
+-- any manner and for any purpose whatsoever, and to have or permit others
+-- to do so.
+--
+-- DISCLAIMER
+--
+-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
+-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
+-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
+-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
+-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
+-- PARTICULAR PURPOSE OF SAID MATERIAL.
+--*
+--
+-- OBJECTIVE:
+-- See C3900063.AM.
+--
+-- TEST DESCRIPTION:
+-- See C3900063.AM.
+--
+-- TEST FILES:
+-- This test consists of the following files:
+--
+-- => C3900060.A
+-- C3900061.A
+-- C3900062.A
+-- C3900063.AM
+--
+--
+-- CHANGE HISTORY:
+-- 06 Dec 94 SAIC ACVC 2.0
+-- 04 Jun 96 SAIC ACVC 2.1: Modified prologue. Added pragma Elaborate
+-- for Ada.Calendar.
+--
+--!
+
+with Ada.Calendar;
+pragma Elaborate (Ada.Calendar);
+
+package C3900060 is -- Alert system abstraction.
+
+
+ -- Declarations used by component Arrival_Time.
+
+ Default_Time : constant Ada.Calendar.Time :=
+ Ada.Calendar.Time_Of (1901, 1, 1);
+ Alert_Time : constant Ada.Calendar.Time :=
+ Ada.Calendar.Time_Of (1991, 6, 15);
+
+
+ -- Declarations used by component Display_On and procedure Display.
+
+ type Device_Enum is (Null_Device, Teletype, Console, Big_Screen);
+ type Display_Counters is array (Device_Enum) of Natural;
+
+ Display_Count_For : Display_Counters := (others => 0);
+
+
+
+ type Alert_Type is tagged private; -- Root tagged type.
+
+ procedure Set_Display (A : in out Alert_Type; -- To be inherited by
+ D : in Device_Enum); -- all derivatives.
+
+ procedure Display (A : in Alert_Type); -- To be inherited by
+ -- all derivatives.
+
+ procedure Handle (A : in out Alert_Type); -- To be overridden by
+ -- all derivatives.
+
+
+ -- The following functions are needed to verify the values of the
+ -- root tagged type's private components.
+
+ function Get_Time (A: Alert_Type) return Ada.Calendar.Time;
+
+ function Get_Display (A: Alert_Type) return Device_Enum;
+
+ function Initial_Values_Okay (A : in Alert_Type)
+ return Boolean;
+
+ function Bad_Final_Values (A : in Alert_Type)
+ return Boolean;
+
+private
+
+ type Alert_Type is tagged record -- Root tagged type.
+ Arrival_Time : Ada.Calendar.Time := Default_Time;
+ Display_On : Device_Enum := Null_Device;
+ end record;
+
+
+end C3900060;
+
+
+ --==================================================================--
+
+
+package body C3900060 is
+
+
+ procedure Set_Display (A : in out Alert_Type;
+ D : in Device_Enum) is
+ begin
+ A.Display_On := D;
+ end Set_Display;
+
+
+ procedure Display (A : in Alert_Type) is
+ begin
+ Display_Count_For (A.Display_On) := Display_Count_For (A.Display_On) + 1;
+ end Display;
+
+
+ procedure Handle (A : in out Alert_Type) is
+ begin
+ A.Arrival_Time := Alert_Time;
+ Display (A);
+ end Handle;
+
+
+ function Get_Time (A: Alert_Type) return Ada.Calendar.Time is
+ begin
+ return A.Arrival_Time;
+ end Get_Time;
+
+
+ function Get_Display (A: Alert_Type) return Device_Enum is
+ begin
+ return A.Display_On;
+ end Get_Display;
+
+
+ function Initial_Values_Okay (A : in Alert_Type) return Boolean is
+ begin
+ return (A = (Arrival_Time => Default_Time, -- Check "=" operator
+ Display_On => Null_Device)); -- availability.
+ end Initial_Values_Okay; -- Aggregate with
+ -- named associations.
+
+ function Bad_Final_Values (A : in Alert_Type) return Boolean is
+ begin
+ return (A /= (Alert_Time, Null_Device)); -- Check "/=" operator
+ -- availability.
+ end Bad_Final_Values; -- Aggregate with
+ -- positional assoc.
+
+end C3900060;