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1 294 jeremybenn
-- C3900050.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      See C3900053.AM.
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--
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-- TEST DESCRIPTION:
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--      See C3900053.AM.
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--
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-- TEST FILES:
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--      This test consists of the following files:
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--
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--      => C3900050.A
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--         C3900051.A
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--         C3900052.A
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--         C3900053.AM
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--
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-- CHANGE HISTORY:
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--      06 Dec 94   SAIC    ACVC 2.0
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--      15 May 96   SAIC    ACVC 2.1: Modified prologue. Added pragma Elaborate
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--                          for Ada.Calendar.
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--
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--!
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with Ada.Calendar;
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pragma Elaborate (Ada.Calendar);
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package C3900050 is  -- Alert system abstraction.
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   -- Declarations used by component Arrival_Time.
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   Default_Time : constant Ada.Calendar.Time :=
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                    Ada.Calendar.Time_Of (1901, 1, 1);
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   Alert_Time   : constant Ada.Calendar.Time :=
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                    Ada.Calendar.Time_Of (1991, 6, 15);
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   -- Declarations used by component Display_On and procedure Display.
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   type Device_Enum      is (Null_Device, Teletype, Console, Big_Screen);
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   type Display_Counters is array (Device_Enum) of Natural;
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   Display_Count_For : Display_Counters := (others => 0);
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   type Alert_Type is tagged private;                 -- Root tagged type.
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   procedure Set_Display (A : in out Alert_Type;      -- To be inherited by
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                          D : in     Device_Enum);    -- all derivatives.
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   procedure Display (A : in Alert_Type);             -- To be inherited by
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                                                      -- all derivatives.
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   procedure Handle (A : in out Alert_Type);          -- To be overridden by
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                                                      -- all derivatives.
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   -- The following functions are needed to verify the values of the
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   -- root tagged type's private components.
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   function Get_Time (A: Alert_Type) return Ada.Calendar.Time;
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   function Get_Display (A: Alert_Type) return Device_Enum;
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   function Initial_Values_Okay (A : in Alert_Type)
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     return Boolean;
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   function Bad_Final_Values (A : in Alert_Type)
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     return Boolean;
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private
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   type Alert_Type is tagged record                    -- Root tagged type.
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      Arrival_Time : Ada.Calendar.Time := Default_Time;
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      Display_On   : Device_Enum   := Null_Device;
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   end record;
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end C3900050;
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     --==================================================================--
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package body C3900050 is  -- Alert system abstraction.
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   procedure Set_Display (A : in out Alert_Type;
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                          D : in     Device_Enum) is
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   begin
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      A.Display_On := D;
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   end Set_Display;
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   procedure Display (A : in Alert_Type) is
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   begin
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      Display_Count_For (A.Display_On) := Display_Count_For (A.Display_On) + 1;
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   end Display;
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   procedure Handle (A : in out Alert_Type) is
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   begin
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      A.Arrival_Time := Alert_Time;
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      Display (A);
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   end Handle;
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   function Get_Time (A: Alert_Type) return Ada.Calendar.Time is
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   begin
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      return A.Arrival_Time;
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   end Get_Time;
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   function Get_Display (A: Alert_Type) return Device_Enum is
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   begin
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      return A.Display_On;
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   end Get_Display;
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   function Initial_Values_Okay (A : in Alert_Type) return Boolean is
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   begin
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      return (A = (Arrival_Time => Default_Time,         -- Check "=" operator
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                   Display_On   => Null_Device));        -- availability.
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   end Initial_Values_Okay;                              -- Aggregate with
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                                                         -- named associations.
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   function Bad_Final_Values (A : in Alert_Type) return Boolean is
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   begin
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      return (A /= (Alert_Time, Null_Device));           -- Check "/=" operator
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                                                         -- availability.
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   end Bad_Final_Values;                                 -- Aggregate with
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                                                         -- positional assoc.
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end C3900050;

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