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-- C730004.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 for a type declared in a package, descendants of the package

--      use the full view of type.  Specifically check that full view of the

--      limited type is visible only in private descendants (children) and in

--      the private parts and bodies of public descendants (children).

--      Check that a limited type may be used as an out parameter outside

--      the package that defines the type.

--

-- TEST DESCRIPTION:

--      This test defines a parent package containing limited private type

--      definitions. Children packages are defined (one public, one private)

--      that use the nonlimited full view of the types defined in the private

--      part of the parent specification.

--      The main declares a procedure with an out parameter that was defined

--      as limited in the specification of the parent package.

--

--

-- CHANGE HISTORY:

--      15 Sep 95   SAIC    Initial prerelease version.

--      23 Apr 96   SAIC    Added prefix for parameter in Call_Modify_File.

--      02 Nov 96   SAIC    ACVC 2.1: Modified prologue and Test.Report.

--

--!

package C730004_0 is

   -- Full views of File_Descriptor, File_Mode, File_Name, and File_Type are

   -- are nonlimited.

   type File_Descriptor is limited private;

   type File_Mode is limited private;

   Active_Mode  : constant File_Mode;

   type File_Name is limited private;

   type File_Type is limited private;

   function Next_Available_File return File_Descriptor;

private

   type File_Descriptor is new Integer;

   Null_File    : constant File_Descriptor := 0;

   First_File   : constant File_Descriptor := 1;

   type File_Mode is

     (Read_Only, Write_Only, Read_Write, Archived, Corrupt, Lost);

   Default_Mode : constant File_Mode       := Read_Only;

   Active_Mode  : constant File_Mode       := Read_Write;

   type File_Name is array (1 .. 6) of Character;

   Null_String : File_Name := "      ";

   String1     : File_Name := "ACVC  ";

   String2     : File_Name := "  1995";

   type File_Type is

     record

        Descriptor : File_Descriptor := Null_File;

        Mode       : File_Mode       := Default_Mode;

        Name       : File_Name       := Null_String;

     end record;

end C730004_0;

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

package body C730004_0 is

   File_Count : Integer := 0;

   function Next_Available_File return File_Descriptor is

   begin

      File_Count := File_Count + 1;

      return (File_Descriptor(File_Count));    -- Type conversion.

   end Next_Available_File;

end C730004_0;

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

private

package C730004_0.C730004_1 is                             -- private child

   -- Since full view of the nontagged File_Name is nonlimited in the parent

   -- package, it is not limited in the private child, so concatenation is

   -- available.

   System_File_Name :  constant File_Name

                    := String1(1..4) & String2(5..6);

   -- Since full view of the nontagged File_Type is nonlimited in the parent

   -- package, it is not limited in the private child, so a default expression

   -- is available.

   function New_File_Validated (File :  File_Type

                                     := (Descriptor => First_File,

                                         Mode       => Active_Mode,

                                         Name       => System_File_Name))

     return Boolean;

   -- Since full view of the nontagged File_Type is nonlimited in the parent

   -- package, it is not limited in the private child, so initialization

   -- expression in an object declaration is available.

   System_File      :  File_Type

                    := (Null_File, Read_Only, System_File_Name);

end C730004_0.C730004_1;

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

package body C730004_0.C730004_1 is

   function New_File_Validated (File :  File_Type

                                     := (Descriptor => First_File,

                                         Mode       => Active_Mode,

                                         Name       => System_File_Name))

     return Boolean is

      Result : Boolean := False;

   begin

      if (File.Descriptor > System_File.Descriptor) and

         (File.Mode in Read_Only .. Read_Write) and (File.Name = "ACVC95")

      then

         Result := True;

      end if;

      return (Result);

   end New_File_Validated;

end C730004_0.C730004_1;

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

package C730004_0.C730004_2 is                   -- public child

   -- File_Type is limited here.

   procedure Create_File (File : out File_Type);

   procedure Modify_File (File : out File_Type);

   type File_Dir is limited private;

   -- The following three validation functions provide the capability to

   -- check the limited private types defined in the parent and the

   -- private child package from within the client program.

   function  Validate_Create (File : in File_Type) return Boolean;

   function  Validate_Modification (File : in File_Type)

     return Boolean;

   function  Validate_Dir (Dir : in File_Dir) return Boolean;

private

   -- Since full view of the nontagged File_Type is nonlimited in the parent

   -- package, it is not limited in the private part of the public child, so

   -- aggregates are available.

   Child_File :  File_Type

              := File_Type'(Descriptor => Null_File,

                            Mode       => Write_Only,

                            Name       => String2);

   -- Since full view of the nontagged component File_Type is nonlimited in

   -- the parent package, it is not limited in the private part of the public

   -- child, so default expressions are available.

   type File_Dir is

     record

        Comp : File_Type := Child_File;

     end record;

end C730004_0.C730004_2;

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

with C730004_0.C730004_1;

package body C730004_0.C730004_2 is

   procedure Create_File (File : out File_Type) is

      New_File : File_Type;

   begin

      New_File.Descriptor := Next_Available_File;

      New_File.Mode       := Default_Mode;

      New_File.Name       := C730004_0.C730004_1.System_File_Name;

      if C730004_0.C730004_1.New_File_Validated (New_File) then

         File := New_File;

      else

         File := (Null_File, Lost, "MISSED");

      end if;

   end Create_File;

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

   procedure Modify_File (File : out File_Type) is

   begin

      File.Descriptor := Next_Available_File;

      File.Mode       := Active_Mode;

      File.Name       := String1;

   end Modify_File;

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

   function  Validate_Create (File : in File_Type) return Boolean is

   begin

      if ((File.Descriptor /= Child_File.Descriptor) and

          (File.Mode = Read_Only) and (File.Name = "ACVC95"))

      then

         return True;

      else

         return False;

      end if;

   end Validate_Create;

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

   function  Validate_Modification (File : in File_Type)

      return Boolean is

   begin

      if ((File.Descriptor /= C730004_0.C730004_1.System_File.Descriptor) and

          (File.Mode = Read_Write) and (File.Name = "ACVC  "))

      then

         return True;

      else

         return False;

      end if;

   end Validate_Modification;

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

   function  Validate_Dir (Dir : in File_Dir) return Boolean is

   begin

      if ((Dir.Comp.Descriptor = C730004_0.C730004_1.System_File.Descriptor)

        and (Dir.Comp.Mode = Write_Only) and (Dir.Comp.Name = String2))

      then

         return True;

      else

         return False;

      end if;

   end Validate_Dir;

end C730004_0.C730004_2;

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

with C730004_0.C730004_2;

with Report;

procedure C730004 is

   package File      renames C730004_0;

   package File_Ops  renames C730004_0.C730004_2;

   Validation_File : File.File_Type;

   Validation_Dir  : File_Ops.File_Dir;

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

   -- Limited File_Type is allowed as an out parameter outside package File.

   procedure Call_Modify_File (Modified_File : out File.File_Type) is

   begin

      File_Ops.Modify_File (Modified_File);

   end Call_Modify_File;

begin

   Report.Test ("C730004", "Check that for a type declared in a package, "   &

                           "descendants of the package use the full view "   &

                           "of the type.  Specifically check that full "     &

                           "view of the limited type is visible only in "    &

                           "private children and in the private parts and "  &

                           "bodies of public children");

   File_Ops.Create_File (Validation_File);

   if not File_Ops.Validate_Create (Validation_File) then

      Report.Failed ("Incorrect creation of file");

   end if;

   Call_Modify_File (Validation_File);

   if not File_Ops.Validate_Modification (Validation_File) then

      Report.Failed ("Incorrect modification of file");

   end if;

   if not File_Ops.Validate_Dir (Validation_Dir) then

      Report.Failed ("Incorrect creation of directory");

   end if;

   Report.Result;

end C730004;