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-- CA13A02.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:
--      Check that subunits declared in generic child units of a public 
--      parent have the same visibility into its parent, its siblings 
--      (public and private), and packages on which its parent depends 
--      as is available at the point of their declaration.
--
-- TEST DESCRIPTION:
--      Declare an outside elevator button operation as a subunit in a 
--      generic child package of the basic operation package (FA13A00.A).  
--      This procedure has visibility into its parent ancestor and its 
--      private sibling.
--
--      In the main program, instantiate the child package. Check that 
--      subunits perform as expected.  
--
-- TEST FILES:
--      The following files comprise this test:
--
--         FA13A00.A
--         CA13A02.A
--
--
-- CHANGE HISTORY:
--      06 Dec 94   SAIC    ACVC 2.0
--
--!

-- Public generic child package of an elevator application.  This package
-- provides outside elevator button operations.

generic                           -- Instantiate once for each floor.
   Our_Floor : in Floor;          -- Reference type declared in parent.

package FA13A00_1.CA13A02_4 is    -- Outside Elevator Button Operations

   type Light is (Up, Down, Express, Off);

   type Direction is (Up, Down, Express);

   function Call_Elevator (D : Direction) return Light;

   -- other type definitions and procedure declarations in real application.

end FA13A00_1.CA13A02_4;

     --==================================================================--

-- Context clauses required for visibility needed by separate subunit.

with FA13A00_0;                   -- Building Manager

with FA13A00_1.FA13A00_2;         -- Floor Calculation (private)
                                         
with FA13A00_1.FA13A00_3;         -- Move Elevator

use  FA13A00_0;                           

package body FA13A00_1.CA13A02_4 is              

   function Call_Elevator (D : Direction) return Light is separate;

end FA13A00_1.CA13A02_4;

     --==================================================================--

separate (FA13A00_1.CA13A02_4)

-- Subunit Call_Elevator declared in Outside Elevator Button Operations.

function Call_Elevator (D : Direction) return Light is
   Elevator_Button : Light;

begin
   -- See if power is on.

   if Power = Off then                       -- Reference package with'ed by
      Elevator_Button := Off;                -- the subunit parent's body.

   else
      case D is
         when Express =>        
            FA13A00_1.FA13A00_3.Move_Elevator -- Reference public sibling of
              (Penthouse, Call_Waiting);      -- the subunit parent's body.

            Elevator_Button := Express;    

         when Up      =>        
            if Current_Floor < Our_Floor then
               FA13A00_1.FA13A00_2.Up         -- Reference private sibling of
                 (Floor'pos (Our_Floor)       -- the subunit parent's body.
                   - Floor'pos (Current_Floor));
            else
               FA13A00_1.FA13A00_2.Down       -- Reference private sibling of
                 (Floor'pos (Current_Floor)   -- the subunit parent's body.
                   - Floor'pos (Our_Floor));
            end if;

            -- Call elevator.

            Call 
              (Current_Floor, Call_Waiting);  -- Reference subprogram declared
                                              -- in the parent of the subunit 
                                              -- parent's body. 
            Elevator_Button := Up;    

         when Down    =>        
            if Current_Floor > Our_Floor then
               FA13A00_1.FA13A00_2.Down       -- Reference private sibling of
                 (Floor'pos (Current_Floor)   -- the subunit parent's body.
                   - Floor'pos (Our_Floor));
            else
               FA13A00_1.FA13A00_2.Up         -- Reference private sibling of
                 (Floor'pos (Our_Floor)       -- the subunit parent's body.
                   - Floor'pos (Current_Floor));
            end if;

            Elevator_Button := Down;    

            -- Call elevator.

            Call 
              (Current_Floor, Call_Waiting);  -- Reference subprogram declared
                                              -- in the parent of the subunit 
                                              -- parent's body.
      end case;

      if not Call_Waiting (Current_Floor)     -- Reference private part of the
      then                                    -- parent of the subunit parent's
                                              -- body.
         TC_Operation := false;              
      end if;

   end if;

   return Elevator_Button;

end Call_Elevator;

     --==================================================================--

with FA13A00_1.CA13A02_4;         -- Outside Elevator Button Operations
                                  -- implicitly with Basic Elevator
                                  -- Operations
with Report;

procedure CA13A02 is

begin

   Report.Test ("CA13A02", "Check that subunits declared in generic child " &
                "units of a public parent have the same visibility into " & 
                "its parent, its parent's siblings, and packages on " &
                "which its parent depends");

-- Going from floor one to penthouse.

   Going_To_Penthouse:
   declare
      -- Declare instance of the child generic elevator package for penthouse.
 
      package Call_Elevator_Pkg is new FA13A00_1.CA13A02_4 
        (FA13A00_1.Penthouse);

      use Call_Elevator_Pkg;

      Call_Button_Light : Light;

   begin

      Call_Button_Light := Call_Elevator (Express);

      if not FA13A00_1.TC_Operation or Call_Button_Light /= Express then
         Report.Failed ("Incorrect elevator operation going to penthouse");
      end if;

   end Going_To_Penthouse;

-- Going from penthouse to basement.

   Going_To_Basement:
   declare
      -- Declare instance of the child generic elevator package for basement.
 
      package Call_Elevator_Pkg is new FA13A00_1.CA13A02_4 
        (FA13A00_1.Basement);

      use Call_Elevator_Pkg;

      Call_Button_Light : Light;

   begin

      Call_Button_Light := Call_Elevator (Down);

      if not FA13A00_1.TC_Operation or Call_Button_Light /= Down then
         Report.Failed ("Incorrect elevator operation going to basement");
      end if;

   end Going_To_Basement;
  
-- Going from basement to floor three.

   Going_To_Floor3:
   declare
      -- Declare instance of the child generic elevator package for floor 
      -- three.
 
      package Call_Elevator_Pkg is new FA13A00_1.CA13A02_4 
        (FA13A00_1.Floor3);

      use Call_Elevator_Pkg;

      Call_Button_Light : Light;

   begin

      Call_Button_Light := Call_Elevator (Up);

      if not FA13A00_1.TC_Operation or Call_Button_Light /= Up then
         Report.Failed ("Incorrect elevator operation going to floor 3");
      end if;

   end Going_To_Floor3;
  
-- Going from floor three to floor two.

   Going_To_Floor2:
   declare
      -- Declare instance of the child generic elevator package for floor two.
 
      package Call_Elevator_Pkg is new FA13A00_1.CA13A02_4 
        (FA13A00_1.Floor2);

      use Call_Elevator_Pkg;

      Call_Button_Light : Light;

   begin

      Call_Button_Light := Call_Elevator (Up);

      if not FA13A00_1.TC_Operation or Call_Button_Light /= Up then
         Report.Failed ("Incorrect elevator operation going to floor 2");
      end if;

   end Going_To_Floor2;
  
-- Going to floor one.

   Going_To_Floor1:
   declare
      -- Declare instance of the child generic elevator package for floor one.
 
      package Call_Elevator_Pkg is new FA13A00_1.CA13A02_4 
        (FA13A00_1.Floor1);

      use Call_Elevator_Pkg;

      Call_Button_Light : Light;

   begin
      -- Calling elevator from floor one.

      FA13A00_1.Current_Floor := FA13A00_1.Floor1;

      Call_Button_Light := Call_Elevator (Down);

      if not FA13A00_1.TC_Operation or Call_Button_Light /= Down then
         Report.Failed ("Incorrect elevator operation going to floor 1");
      end if;

   end Going_To_Floor1;

   Report.Result;

end CA13A02;