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-- CA11011.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
-- private part of the parent unit of its parent unit.
--
-- TEST DESCRIPTION:
-- Declare a parent package containing private types and objects
-- used by the system. Declare a public child package that
-- provides a visible interface to the system functionality.
-- Declare a private grandchild package that uses the visible grandparent
-- components to provide the actual functionality to the system.
--
-- The public child (parent of the private grandchild) uses the
-- functionality of its private child (grandchild package) to provide
-- the visible interface to operations of the system.
--
-- The test itself will utilize the visible interface provided in the
-- public child package to demonstrate a possible solution to file
-- management.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
package CA11011_0 is -- Package OS.
type File_Descriptor_Type is private;
Default_Descriptor : constant File_Descriptor_Type;
First_File : constant File_Descriptor_Type;
procedure Verify_Initial_Conditions (Key : in File_Descriptor_Type;
Status : out Boolean);
function Final_Conditions_Valid (Key : File_Descriptor_Type)
return Boolean;
private
type File_Descriptor_Type is new Integer;
type File_Name_Type is new String (1 .. 11);
type Permission_Type is (None, User, System);
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;
First_File : constant File_Descriptor_Type := 1;
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 := " ";
Init_Permission : constant Permission_Type := User;
Init_Mode : constant File_Mode_Type := Read_Write;
Init_Status : constant File_Status_Type := Open;
An_Ada_File_Name : constant File_Name_Type := "AdaFileName";
Max_Files : constant File_Descriptor_Type := 10;
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;
File_Counter : Integer := 0;
--
function Get_File_Name return File_Name_Type;
end CA11011_0; -- Package OS.
--=================================================================--
package body CA11011_0 is -- Package body OS.
function Get_File_Name return File_Name_Type is
begin
return (An_Ada_File_Name);
end Get_File_Name;
---------------------------------------------------------------------
procedure Verify_Initial_Conditions (Key : in File_Descriptor_Type;
Status : out Boolean) is
begin
Status := False;
if (File_Table(Key).Descriptor = Default_Descriptor) and then
(File_Table(Key).Name = Default_Filename) and then
(File_Table(Key).Acct_Access = Default_Permission) and then
(File_Table(Key).Mode = Default_Mode) and then
(File_Table(Key).Current_Status = Default_Status)
then
Status := True;
end if;
end Verify_Initial_Conditions;
---------------------------------------------------------------------
function Final_Conditions_Valid (Key : File_Descriptor_Type)
return Boolean is
begin
if ((File_Table(Key).Descriptor = First_File) and then
(File_Table(Key).Name = An_Ada_File_Name) and then
(File_Table(Key).Acct_Access = Init_Permission) and then
not ((File_Table(Key).Mode = Default_Mode) or else
(File_Table(Key).Current_Status = Default_Status)))
then
return (True);
else
return (False);
end if;
end Final_Conditions_Valid;
end CA11011_0; -- Package body OS.
--=================================================================--
package CA11011_0.CA11011_1 is -- Package OS.File_Manager
procedure Create_File (File_Key : in File_Descriptor_Type);
end CA11011_0.CA11011_1; -- Package OS.File_Manager
--=================================================================--
-- The Subprogram that performs the actual file operations is contained in a
-- private package so that it is not accessible to any client.
-- Default parameters are used in most cases in the subprogram calls, since
-- the caller does not have visibility to these private types.
-- Package OS.File_Manager.Internals
private package CA11011_0.CA11011_1.CA11011_2 is
Private_File_Counter : Integer renames File_Counter; -- Grandparent
-- object.
procedure Create
(Key : in File_Descriptor_Type;
File_Name : in File_Name_Type := Get_File_Name; -- Grandparent
-- prvt type,
-- prvt functn.
File_Mode : in File_Mode_Type := Init_Mode; -- Grandparent
-- prvt type,
-- prvt const.
File_Access : in Permission_Type := Init_Permission; -- Grandparent
-- prvt type,
-- prvt const.
File_Status : in File_Status_Type := Init_Status); -- Grandparent
-- prvt type,
-- prvt const.
end CA11011_0.CA11011_1.CA11011_2; -- Package OS.File_Manager.Internals
--=================================================================--
-- Package Body OS.File_Manager.Internals
package body CA11011_0.CA11011_1.CA11011_2 is
procedure Create
(Key : in File_Descriptor_Type;
File_Name : in File_Name_Type := Get_File_Name;
File_Mode : in File_Mode_Type := Init_Mode;
File_Access : in Permission_Type := Init_Permission;
File_Status : in File_Status_Type := Init_Status) is
begin
Private_File_Counter := Private_File_Counter + 1;
File_Table(Key).Descriptor := Key; -- Grandparent object.
File_Table(Key).Name := File_Name;
File_Table(Key).Mode := File_Mode;
File_Table(Key).Acct_Access := File_Access;
File_Table(Key).Current_Status := File_Status;
end Create;
end CA11011_0.CA11011_1.CA11011_2; -- Package body OS.File_Manager.Internals
--=================================================================--
with CA11011_0.CA11011_1.CA11011_2; -- with Child OS.File_Manager.Internals
package body CA11011_0.CA11011_1 is -- Package body OS.File_Manager
package Internal renames CA11011_0.CA11011_1.CA11011_2;
-- This subprogram utilizes a call to a subprogram contained in a private
-- child to perform the actual processing.
procedure Create_File (File_Key : in File_Descriptor_Type) is
begin
Internal.Create (Key => File_Key); -- Other parameters are defaults,
-- since they are of private types
-- from the parent package.
-- File_Descriptor_Type is private,
-- but declared in visible part of
-- parent spec.
end Create_File;
end CA11011_0.CA11011_1; -- Package body OS.File_Manager
--=================================================================--
with CA11011_0.CA11011_1; -- with public Child Package OS.File_Manager
with Report;
procedure CA11011 is
package OS renames CA11011_0;
package File_Manager renames CA11011_0.CA11011_1;
Data_Base_File_Key : OS.File_Descriptor_Type := OS.First_File;
TC_Status : Boolean := False;
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 typical user situation.
Report.Test ("CA11011", "Check that a private child package can use " &
"entities declared in the private part of the " &
"parent unit of its parent unit");
OS.Verify_Initial_Conditions (Data_Base_File_Key, TC_Status);
if not TC_Status then
Report.Failed ("Initial condition failure");
end if;
-- Perform file initializations.
File_Manager.Create_File (File_Key => Data_Base_File_Key);
TC_Status := OS.Final_Conditions_Valid (Data_Base_File_Key);
if not TC_Status then
Report.Failed ("Bad status return from Create_File");
end if;
Report.Result;
end CA11011;
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