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-- CA11010.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 its parent unit.
--
-- TEST DESCRIPTION:
-- Declare a parent package containing private types, objects,
-- and functions used by the system. Declare a private child package that
-- uses the parent components to provide functionality to the system.
--
-- Declare an array of files with default values for all
-- component fields of the files (records). Check the initial state of
-- a specified file for proper default values. Perform the file "creation"
-- (initialization), which will modify the fields of the record object.
-- Again verify the file object to determine whether the fields have been
-- reset properly.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
package CA11010_0 is -- Package OS.
type File_Descriptor_Type is private;
Default_Descriptor : constant File_Descriptor_Type;
function Initialize_File return File_Descriptor_Type;
procedure Verify_Initial_Conditions (Status : out Boolean);
function Final_Conditions_Valid 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;
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 := " ";
An_Ada_File_Name : constant File_Name_Type := "AdaFileName";
Max_Files : constant File_Descriptor_Type := 100;
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 CA11010_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 CA11010_0.CA11010_1 is -- Package OS.Internals
Private_File_Counter : Integer renames File_Counter; -- Parent priv. object.
function Initialize
(File_Name : File_Name_Type := Get_File_Name; -- Parent priv. function.
File_Mode : File_Mode_Type := Read_Write) -- Parent priv. literal.
return File_Descriptor_Type; -- Parent type.
end CA11010_0.CA11010_1; -- Package OS.Internals
--=================================================================--
package body CA11010_0.CA11010_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 priv. function
File_Mode : File_Mode_Type := Read_Write) -- Parent priv. literal
return File_Descriptor_Type is -- Parent type
Number : File_Descriptor_Type;
begin
Number := Next_Available_File;
File_Table(Number).Descriptor := Number; -- Parent priv. 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 CA11010_0.CA11010_1; -- Package body OS.Internals
--=================================================================--
with CA11010_0.CA11010_1; -- Private child package "withed" by
-- parent body.
package body CA11010_0 is -- Package body OS
function Get_File_Name return File_Name_Type is
begin
return (An_Ada_File_Name); -- If this was a real function, the user
end Get_File_Name; -- would be asked to input a name, or there
-- would be some type of similar processing.
-- 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 (CA11010_0.CA11010_1.Initialize); -- No parameters are needed,
-- since defaults have been
-- provided.
end Initialize_File;
--
-- Separate subunits.
--
procedure Verify_Initial_Conditions (Status : out Boolean) is separate;
function Final_Conditions_Valid return Boolean is separate;
end CA11010_0; -- Package body OS
--=================================================================--
separate (CA11010_0)
procedure Verify_Initial_Conditions (Status : out Boolean) is
begin
Status := False;
if (File_Table(1).Descriptor = Default_Descriptor) and then
(File_Table(1).Name = Default_Filename) and then
(File_Table(1).Acct_Access = Default_Permission) and then
(File_Table(1).Mode = Default_Mode) and then
(File_Table(1).Current_Status = Default_Status)
then
Status := True;
end if;
end Verify_Initial_Conditions;
--=================================================================--
separate (CA11010_0)
function Final_Conditions_Valid return Boolean is
begin
if ((File_Table(1).Descriptor /= Default_Descriptor) and then
(File_Table(1).Name = An_Ada_File_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
return (True);
else
return (False);
end if;
end Final_Conditions_Valid;
--=================================================================--
with CA11010_0; -- with Package OS.
with Report;
procedure CA11010 is
package OS renames CA11010_0;
Ada_File_Key : OS.File_Descriptor_Type := OS.Default_Descriptor;
Initialization_Status : Boolean := False;
begin
-- This test indicates one approach to a file management operation.
-- 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 ("CA11010", "Check that a private child package can use " &
"entities declared in the private 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.
OS.Verify_Initial_Conditions (Initialization_Status);
if not Initialization_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/only 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 := OS.Initialize_File;
-- Verify that the initial conditions of the file table component have
-- been properly modified by the initialization function.
if not OS.Final_Conditions_Valid then
Report.Failed ("Initialization processing failure");
end if;
Report.Result;
end CA11010;
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