1-- C3900060.A
2--
3--                             Grant of Unlimited Rights
4--
5--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
6--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
7--     unlimited rights in the software and documentation contained herein.
8--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
9--     this public release, the Government intends to confer upon all
10--     recipients unlimited rights  equal to those held by the Government.
11--     These rights include rights to use, duplicate, release or disclose the
12--     released technical data and computer software in whole or in part, in
13--     any manner and for any purpose whatsoever, and to have or permit others
14--     to do so.
15--
16--                                    DISCLAIMER
17--
18--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
19--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
20--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
21--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
22--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
23--     PARTICULAR PURPOSE OF SAID MATERIAL.
24--*
25--
26-- OBJECTIVE:
27--      See C3900063.AM.
28--
29-- TEST DESCRIPTION:
30--      See C3900063.AM.
31--
32-- TEST FILES:
33--      This test consists of the following files:
34--
35--      => C3900060.A
36--         C3900061.A
37--         C3900062.A
38--         C3900063.AM
39--
40--
41-- CHANGE HISTORY:
42--      06 Dec 94   SAIC    ACVC 2.0
43--      04 Jun 96   SAIC    ACVC 2.1: Modified prologue. Added pragma Elaborate
44--                          for Ada.Calendar.
45--
46--!
47
48with Ada.Calendar;
49pragma Elaborate (Ada.Calendar);
50
51package C3900060 is  -- Alert system abstraction.
52
53
54   -- Declarations used by component Arrival_Time.
55
56   Default_Time : constant Ada.Calendar.Time :=
57                    Ada.Calendar.Time_Of (1901, 1, 1);
58   Alert_Time   : constant Ada.Calendar.Time :=
59                    Ada.Calendar.Time_Of (1991, 6, 15);
60
61
62   -- Declarations used by component Display_On and procedure Display.
63
64   type Device_Enum      is (Null_Device, Teletype, Console, Big_Screen);
65   type Display_Counters is array (Device_Enum) of Natural;
66
67   Display_Count_For : Display_Counters := (others => 0);
68
69
70
71   type Alert_Type is tagged private;                 -- Root tagged type.
72
73   procedure Set_Display (A : in out Alert_Type;      -- To be inherited by
74                          D : in     Device_Enum);    -- all derivatives.
75
76   procedure Display (A : in Alert_Type);             -- To be inherited by
77                                                      -- all derivatives.
78
79   procedure Handle (A : in out Alert_Type);          -- To be overridden by
80                                                      -- all derivatives.
81
82
83   -- The following functions are needed to verify the values of the
84   -- root tagged type's private components.
85
86   function Get_Time (A: Alert_Type) return Ada.Calendar.Time;
87
88   function Get_Display (A: Alert_Type) return Device_Enum;
89
90   function Initial_Values_Okay (A : in Alert_Type)
91     return Boolean;
92
93   function Bad_Final_Values (A : in Alert_Type)
94     return Boolean;
95
96private
97
98   type Alert_Type is tagged record                    -- Root tagged type.
99      Arrival_Time : Ada.Calendar.Time := Default_Time;
100      Display_On   : Device_Enum   := Null_Device;
101   end record;
102
103
104end C3900060;
105
106
107     --==================================================================--
108
109
110package body C3900060 is
111
112
113   procedure Set_Display (A : in out Alert_Type;
114                          D : in     Device_Enum) is
115   begin
116      A.Display_On := D;
117   end Set_Display;
118
119
120   procedure Display (A : in Alert_Type) is
121   begin
122      Display_Count_For (A.Display_On) := Display_Count_For (A.Display_On) + 1;
123   end Display;
124
125
126   procedure Handle (A : in out Alert_Type) is
127   begin
128      A.Arrival_Time := Alert_Time;
129      Display (A);
130   end Handle;
131
132
133   function Get_Time (A: Alert_Type) return Ada.Calendar.Time is
134   begin
135      return A.Arrival_Time;
136   end Get_Time;
137
138
139   function Get_Display (A: Alert_Type) return Device_Enum is
140   begin
141      return A.Display_On;
142   end Get_Display;
143
144
145   function Initial_Values_Okay (A : in Alert_Type) return Boolean is
146   begin
147      return (A = (Arrival_Time => Default_Time,         -- Check "=" operator
148                   Display_On   => Null_Device));        -- availability.
149   end Initial_Values_Okay;                              -- Aggregate with
150                                                         -- named associations.
151
152   function Bad_Final_Values (A : in Alert_Type) return Boolean is
153   begin
154      return (A /= (Alert_Time, Null_Device));           -- Check "/=" operator
155                                                         -- availability.
156   end Bad_Final_Values;                                 -- Aggregate with
157                                                         -- positional assoc.
158
159end C3900060;
160