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-- CA11008.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 private child package can use entities declared in the
-- visible part of its parent unit.
--
-- TEST DESCRIPTION:
-- Declare a parent package containing types and objects used
-- by the system. Declare a private child package that uses the parent
-- components to provide functionality to the system.
--
-- The tagged file type defined in the parent has defaults for all
-- component fields. Prior to initialization, these values are checked
-- to ensure a correct start condition. The initial subprogram is
-- called, which utilizes the functionality provided in the private
-- child package. This subprogram changes the fields of the file object
-- to something other than the default values, and this process is then
-- verified at the conclusion of the test.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
package CA11008_0 is -- Package OS.
type File_Descriptor_Type is new Integer;
type File_Name_Type is new String (1 .. 11);
type Permission_Type is (None, User, System, Bypass);
type File_Mode_Type is (Read_Only, Write_Only, Read_Write);
type File_Status_Type is (Open, Closed);
Default_Descriptor : constant File_Descriptor_Type := 0;
Default_Permission : constant Permission_Type := None;
Default_Mode : constant File_Mode_Type := Read_Only;
Default_Status : constant File_Status_Type := Closed;
Default_Filename : constant File_Name_Type := " ";
Max_Files : constant File_Descriptor_Type := 100;
Constant_Name : constant File_Name_Type := "AdaFileName";
File_Counter : Integer := 0;
type File_Type is tagged
record
Descriptor : File_Descriptor_Type := Default_Descriptor;
Name : File_Name_Type := Default_Filename;
Acct_Access : Permission_Type := Default_Permission;
Mode : File_Mode_Type := Default_Mode;
Current_Status : File_Status_Type := Default_Status;
end record;
type File_Array_Type is array (1 .. Max_Files) of File_Type;
File_Table : File_Array_Type;
--
function Get_File_Name return File_Name_Type;
function Initialize_File return File_Descriptor_Type;
end CA11008_0; -- Package OS.
--=================================================================--
-- Subprograms that perform the actual file operations are contained in a
-- private package so that they are not accessible to any client.
private package CA11008_0.CA11008_1 is -- Package OS.Internals
Private_File_Counter : Integer renames File_Counter; -- Parent
-- object.
function Initialize
(File_Name : File_Name_Type := Get_File_Name; -- Parent function.
File_Mode : File_Mode_Type := Read_Write) -- Parent literal.
return File_Descriptor_Type; -- Parent type.
end CA11008_0.CA11008_1; -- Package OS.Internals
--=================================================================--
package body CA11008_0.CA11008_1 is -- Package body OS.Internals
function Next_Available_File return File_Descriptor_Type is
begin
Private_File_Counter := Private_File_Counter + 1;
return (File_Descriptor_Type(File_Counter));
end Next_Available_File;
-----------------------------------------------------------------
function Initialize
(File_Name : File_Name_Type := Get_File_Name; -- Parent function
File_Mode : File_Mode_Type := Read_Write) -- Parent literal
return File_Descriptor_Type is -- Parent type
Number : File_Descriptor_Type;
begin
Number := Next_Available_File;
File_Table(Number).Descriptor := Number; -- Parent object
File_Table(Number).Name := File_Name; -- Default parameter value
File_Table(Number).Mode := File_Mode; -- Default parameter value
File_Table(Number).Acct_Access := User;
File_Table(Number).Current_Status := Open;
return (Number);
end Initialize;
end CA11008_0.CA11008_1; -- Package body OS.Internals
--=================================================================--
with CA11008_0.CA11008_1; -- Private child package "withed" by
-- parent body.
package body CA11008_0 is -- Package body OS
function Get_File_Name return File_Name_Type is
begin
return (Constant_Name); -- Of course if this was a real function, the
end Get_File_Name; -- user would be asked to input a name, or
-- there would be some type of similar process.
-- This subprogram utilizes a call to a subprogram contained in a private
-- child to perform the actual processing.
function Initialize_File return File_Descriptor_Type is
begin
return (CA11008_0.CA11008_1.Initialize); -- No parameters are needed,
-- since defaults have been
-- provided.
end Initialize_File;
end CA11008_0; -- Package body OS
--=================================================================--
with CA11008_0; -- with Package OS.
with Report;
procedure CA11008 is
package OS renames CA11008_0;
use OS;
Ada_File_Key : File_Descriptor_Type := Default_Descriptor;
begin
-- This test indicates one approach to file management operations.
-- It is not intended to demonstrate full functionality, but rather
-- that the use of a private child package can provide a solution
-- to a user situation, that being the implementation of certain functions
-- being provided in a child package, with the parent package body
-- utilizing these implementations.
Report.Test ("CA11008", "Check that a private child package can use " &
"entities declared in the visible part of its " &
"parent unit");
-- Check initial conditions of the first entry in the file table.
-- These are all default values provided in the declaration of the
-- type File_Type.
if (Ada_File_Key /= Default_Descriptor) or else
(File_Table(1).Descriptor /= (Default_Descriptor) or
(File_Table(1).Name /= Default_Filename)) or else
(File_Table(1).Acct_Access /= (Default_Permission) or
(File_Table(1).Mode /= Default_Mode)) or else
(File_Table(1).Current_Status /= Default_Status)
then
Report.Failed ("Initial condition failure");
end if;
-- Call the initialization function. This will result in the resetting
-- of the fields associated with the first entry in the File_Table (this
-- is the first call of Initialize_File).
-- No parameters are necessary for this call, due to the default values
-- provided in the private child package routine Initialize.
Ada_File_Key := Initialize_File;
-- Verify that the initial conditions of the file table component have
-- been properly modified by the initialization function.
if not ((File_Table(1).Descriptor = Ada_File_Key) and then
(File_Table(1).Name = Constant_Name) and then
(File_Table(1).Acct_Access = User) and then
not ((File_Table(1).Mode = Default_Mode) or else
(File_Table(1).Current_Status = Default_Status)))
then
Report.Failed ("Initialization processing failure");
end if;
Report.Result;
end CA11008;
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