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-- CA13001.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 a separate protected unit declared in a non-generic child

--      unit of a private parent have the same visibility into its parent,

--      its siblings, and packages on which its parent depends as is available

--      at the point of their declaration.

--

-- TEST DESCRIPTION:

--      A scenario is created that demonstrates the potential of having all

--      members of one family to take out a transportation.  The restriction

--      is depend on each member to determine who can get a car, a clunker,

--      or a bicycle.  If no transportation is available, that member has to

--      walk.

--

--      Declare a package with location for each family member.  Declare

--      a public parent package.  Declare a private child package. Declare a

--      public grandchild of this private package.  Declare a protected unit

--      as a subunit in a public grandchild package.  This subunit has

--      visibility into it's parent body ancestor and its sibling.

--

--      Declare another public parent package.  The body of this package has

--      visibility into its private sibling's descendants.

--

--      In the main program, "with"s the parent package.  Check that the

--      protected subunit performs as expected.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      16 Nov 95   SAIC    Update and repair for ACVC 2.0.1

--

--!

package CA13001_0 is

   type Location is (School, Work, Beach, Home);

   type Family is (Father, Mother, Teen);

   Destination : array (Family) of Location;

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

end CA13001_0;

-- No bodies required for CA13001_0.

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

-- Public parent.

package CA13001_1 is

   type Transportation is (Bicycle, Clunker, New_Car);

   type Key_Type is private;

   Walking : boolean := false;

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

private

   type Key_Type

     is range Transportation'pos(Bicycle) .. Transportation'pos(New_Car);

end CA13001_1;

-- No bodies required for CA13001_1.

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

-- Private child.

private package CA13001_1.CA13001_2 is

   type Transport is

      record

         In_Use : boolean := false;

      end record;

   Vehicles : array (Transportation) of Transport;

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

end CA13001_1.CA13001_2;

-- No bodies required for CA13001_1.CA13001_2.

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

-- Public grandchild of a private parent.

package CA13001_1.CA13001_2.CA13001_3 is

   Flat_Tire : array (Transportation) of boolean := (others => false);

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

end CA13001_1.CA13001_2.CA13001_3;

-- No bodies required for CA13001_1.CA13001_2.CA13001_3.

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

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

with CA13001_0;

use  CA13001_0;

-- Public grandchild of a private parent.

package CA13001_1.CA13001_2.CA13001_4 is

   type Transit is

      record

         Available : boolean := false;

      end record;

   type Keys_Array is array (Transportation) of Transit;

   Fuel : array (Transportation) of boolean := (others => true);

   protected Family_Transportation is

      procedure Get_Vehicle (Who : in     Family;

                             Key :    out Key_Type);

      procedure Return_Vehicle (Tr : in Transportation);

      function TC_Verify (What : Transportation) return boolean;

   private

      Keys : Keys_Array;

   end Family_Transportation;

end CA13001_1.CA13001_2.CA13001_4;

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

-- Context clause required for visibility needed by a separate subunit.

with CA13001_1.CA13001_2.CA13001_3;    -- Public sibling.

package body CA13001_1.CA13001_2.CA13001_4 is

   protected body Family_Transportation is separate;

end CA13001_1.CA13001_2.CA13001_4;

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

separate (CA13001_1.CA13001_2.CA13001_4)

protected body Family_Transportation is

   procedure Get_Vehicle (Who : in     Family;

                          Key :    out Key_Type) is

   begin

      case Who is

         when Father|Mother =>

            -- Drive new car to work

            -- Reference package with'ed by the subunit parent's body.

            if Destination(Who) = Work then

               -- Reference type declared in the private parent of the subunit

               -- parent's body.

               -- Reference type declared in the visible part of the

               -- subunit parent's body.

               if not Vehicles(New_Car).In_Use and Fuel(New_Car)

                 -- Reference type declared in the public sibling of the

                 -- subunit parent's body.

                 and not CA13001_1.CA13001_2.CA13001_3.Flat_Tire(New_Car) then

                    Vehicles(New_Car).In_Use := true;

                    -- Reference type declared in the private part of the

                    -- protected subunit.

                    Keys(New_Car).Available := false;

                    Key                     := Transportation'pos(New_Car);

               else

                 -- Reference type declared in the grandparent of the subunit

                 -- parent's body.

                 Walking := true;

               end if;

            -- Drive clunker to other destinations.

            else

               if not Vehicles(Clunker).In_Use and Fuel(Clunker) and not

                 CA13001_1.CA13001_2.CA13001_3.Flat_Tire(Clunker) then

                    Vehicles(Clunker).In_Use := true;

                    Keys(Clunker).Available  := false;

                    Key                      := Transportation'pos(Clunker);

               else

                 Walking := true;

                 Key     := Transportation'pos(Bicycle);

               end if;

            end if;

         -- Similar for Teen.

         when Teen =>

            if not Vehicles(Clunker).In_Use and Fuel(Clunker) and not

              CA13001_1.CA13001_2.CA13001_3.Flat_Tire(Clunker) then

                 Vehicles(Clunker).In_Use := true;

                 Keys(Clunker).Available  := false;

                 Key                      := Transportation'pos(Clunker);

            else

               Walking := true;

               Key     := Transportation'pos(Bicycle);

            end if;

      end case;

   end Get_Vehicle;

   ----------------------------------------------------------------

   -- Any family member can bring back the transportation with the key.

   procedure Return_Vehicle (Tr : in Transportation) is

   begin

      Vehicles(Tr).In_Use := false;

      Keys(Tr).Available  := true;

   end Return_Vehicle;

   ----------------------------------------------------------------

   function TC_Verify (What : Transportation) return boolean is

   begin

      return Keys(What).Available;

   end TC_Verify;

end Family_Transportation;

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

with CA13001_0;

use  CA13001_0;

-- Public child.

package CA13001_1.CA13001_5 is

   -- In a real application, tasks could be used to demonstrate

   -- a family transportation scenario, i.e., each member of

   -- a family can take a vehicle out concurrently, then return

   -- them at the same time. For the purposes of the test, family

   -- transportation happens sequentially.

   procedure Provide_Transportation (Who     : in     Family;

                                     Get_Key :    out Key_Type;

                                     Get_Veh :    out boolean);

   procedure Return_Transportation (What   : in     Transportation;

                                    Rt_Veh :    out boolean);

end CA13001_1.CA13001_5;

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

with CA13001_1.CA13001_2.CA13001_4;   -- Public grandchild of a private parent,

                                      -- implicitly with CA13001_1.CA13001_2.

package body CA13001_1.CA13001_5 is

   package Transportation_Pkg renames CA13001_1.CA13001_2.CA13001_4;

   use Transportation_Pkg;

   -- These two validation subprograms provide the capability to check the

   -- components defined in the private packages from within the client

   -- program.

   procedure Provide_Transportation (Who     : in     Family;

                                     Get_Key :    out Key_Type;

                                     Get_Veh :    out boolean) is

   begin

      -- Goto work, school, or to the beach.

      Family_Transportation.Get_Vehicle (Who, Get_Key);

      if not Family_Transportation.TC_Verify

        (Transportation'Val(Get_Key)) then

           Get_Veh := true;

      else

         Get_Veh := false;

      end if;

   end Provide_Transportation;

   ----------------------------------------------------------------

   procedure Return_Transportation (What   : in     Transportation;

                                    Rt_Veh :    out boolean) is

   begin

      Family_Transportation.Return_Vehicle (What);

      if Family_Transportation.TC_Verify(What) and

        not CA13001_1.CA13001_2.Vehicles(What).In_Use then

           Rt_Veh := true;

      else

         Rt_Veh := false;

      end if;

   end Return_Transportation;

end CA13001_1.CA13001_5;

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

with CA13001_0;

with CA13001_1.CA13001_5;        -- Implicitly with parent, CA13001_1.

with Report;

procedure CA13001 is

   Mommy           : CA13001_0.Family := CA13001_0.Mother;

   Daddy           : CA13001_0.Family := CA13001_0.Father;

   BG              : CA13001_0.Family := CA13001_0.Teen;

   BG_Clunker      : CA13001_1.Transportation := CA13001_1.Clunker;

   Get_Key         : CA13001_1.Key_Type;

   Get_Transit     : boolean := false;

   Return_Transit  : boolean := false;

begin

   Report.Test ("CA13001", "Check that a protected subunit declared in " &

                "a child unit of a private parent have the same visibility " &

                "into its parent, its parent's siblings, and packages on " &

                "which its parent depends");

   -- Get transportation for mother to go to work.

   CA13001_0.Destination(CA13001_0.Mother) := CA13001_0.Work;

   CA13001_1.CA13001_5.Provide_Transportation (Mommy, Get_Key, Get_Transit);

   if not Get_Transit then

      Report.Failed ("Failed to get mother transportation");

   end if;

   -- Get transportation for teen to go to school.

   CA13001_0.Destination(CA13001_0.Teen) := CA13001_0.School;

   Get_Transit := false;

   CA13001_1.CA13001_5.Provide_Transportation (BG, Get_Key, Get_Transit);

   if not Get_Transit then

      Report.Failed ("Failed to get teen transportation");

   end if;

   -- Get transportation for father to go to the beach.

   CA13001_0.Destination(CA13001_0.Father) := CA13001_0.Beach;

   Get_Transit := false;

   CA13001_1.CA13001_5.Provide_Transportation (Daddy, Get_Key, Get_Transit);

   if Get_Transit and not CA13001_1.Walking then

      Report.Failed ("Failed to make daddy to walk to the beach");

   end if;

   -- Return the clunker.

   CA13001_1.CA13001_5.Return_Transportation (BG_Clunker, Return_Transit);

   if not Return_Transit then

      Report.Failed ("Failed to get back the clunker");

   end if;

   Report.Result;

end CA13001;