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1 294 jeremybenn
-- CA11011.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that a private child package can use entities declared in the
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--      private part of the parent unit of its parent unit.
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--
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-- TEST DESCRIPTION:
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--      Declare a parent package containing private types and objects
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--      used by the system.  Declare a public child package that
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--      provides a visible interface to the system functionality.
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--      Declare a private grandchild package that uses the visible grandparent
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--      components to provide the actual functionality to the system.
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--
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--      The public child (parent of the private grandchild) uses the
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--      functionality of its private child (grandchild package) to provide
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--      the visible interface to operations of the system.
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--
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--      The test itself will utilize the visible interface provided in the
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--      public child package to demonstrate a possible solution to file
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--      management.
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--
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--
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-- CHANGE HISTORY:
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--      06 Dec 94   SAIC    ACVC 2.0
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--
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--!
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package CA11011_0 is               -- Package OS.
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   type File_Descriptor_Type is private;
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   Default_Descriptor  : constant File_Descriptor_Type;
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   First_File          : constant File_Descriptor_Type;
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   procedure Verify_Initial_Conditions (Key    : in     File_Descriptor_Type;
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                                        Status :    out Boolean);
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   function Final_Conditions_Valid (Key : File_Descriptor_Type)
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     return Boolean;
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private
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   type File_Descriptor_Type    is new Integer;
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   type File_Name_Type          is new String (1 .. 11);
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   type Permission_Type         is (None, User, System);
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   type File_Mode_Type          is (Read_Only, Write_Only, Read_Write);
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   type File_Status_Type        is (Open, Closed);
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   Default_Descriptor : constant File_Descriptor_Type := 0;
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   First_File         : constant File_Descriptor_Type := 1;
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   Default_Permission : constant Permission_Type      := None;
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   Default_Mode       : constant File_Mode_Type       := Read_Only;
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   Default_Status     : constant File_Status_Type     := Closed;
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   Default_Filename   : constant File_Name_Type       := "           ";
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   Init_Permission    : constant Permission_Type      := User;
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   Init_Mode          : constant File_Mode_Type       := Read_Write;
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   Init_Status        : constant File_Status_Type     := Open;
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   An_Ada_File_Name   : constant File_Name_Type       := "AdaFileName";
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   Max_Files          : constant File_Descriptor_Type := 10;
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   type File_Type is tagged
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      record
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         Descriptor     : File_Descriptor_Type := Default_Descriptor;
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         Name           : File_Name_Type       := Default_Filename;
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         Acct_Access    : Permission_Type      := Default_Permission;
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         Mode           : File_Mode_Type       := Default_Mode;
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         Current_Status : File_Status_Type     := Default_Status;
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      end record;
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   type File_Array_Type is array (1 .. Max_Files) of File_Type;
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   File_Table   : File_Array_Type;
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   File_Counter : Integer := 0;
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   --
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   function  Get_File_Name return File_Name_Type;
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end CA11011_0;                     -- Package OS.
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     --=================================================================--
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package body CA11011_0 is          -- Package body OS.
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   function Get_File_Name return File_Name_Type is
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   begin
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      return (An_Ada_File_Name);
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   end Get_File_Name;
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   ---------------------------------------------------------------------
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   procedure Verify_Initial_Conditions (Key    : in     File_Descriptor_Type;
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                                        Status :    out Boolean) is
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   begin
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      Status := False;
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      if (File_Table(Key).Descriptor     = Default_Descriptor) and then
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         (File_Table(Key).Name           = Default_Filename)   and then
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         (File_Table(Key).Acct_Access    = Default_Permission) and then
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         (File_Table(Key).Mode           = Default_Mode)       and then
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         (File_Table(Key).Current_Status = Default_Status)
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      then
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         Status := True;
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      end if;
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   end Verify_Initial_Conditions;
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   ---------------------------------------------------------------------
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   function Final_Conditions_Valid (Key : File_Descriptor_Type)
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     return Boolean is
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   begin
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      if  ((File_Table(Key).Descriptor          = First_File)         and then
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           (File_Table(Key).Name                = An_Ada_File_Name)   and then
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           (File_Table(Key).Acct_Access         = Init_Permission)    and then
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           not ((File_Table(Key).Mode           = Default_Mode)       or else
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                (File_Table(Key).Current_Status = Default_Status)))
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      then
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         return (True);
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      else
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         return (False);
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      end if;
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   end Final_Conditions_Valid;
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end CA11011_0;                     -- Package body OS.
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     --=================================================================--
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package CA11011_0.CA11011_1 is     -- Package OS.File_Manager
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   procedure Create_File (File_Key : in File_Descriptor_Type);
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end CA11011_0.CA11011_1;           -- Package OS.File_Manager
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     --=================================================================--
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-- The Subprogram that performs the actual file operations is contained in a
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-- private package so that it is not accessible to any client.
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-- Default parameters are used in most cases in the subprogram calls, since
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-- the caller does not have visibility to these private types.
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                                   -- Package OS.File_Manager.Internals
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private package CA11011_0.CA11011_1.CA11011_2 is
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   Private_File_Counter : Integer renames File_Counter;         -- Grandparent
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                                                                -- object.
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   procedure Create
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     (Key         : in     File_Descriptor_Type;
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      File_Name   : in     File_Name_Type   := Get_File_Name;   -- Grandparent
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                                                                -- prvt type,
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                                                                -- prvt functn.
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      File_Mode   : in     File_Mode_Type   := Init_Mode;       -- Grandparent
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                                                                -- prvt type,
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                                                                -- prvt const.
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      File_Access : in     Permission_Type  := Init_Permission; -- Grandparent
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                                                                -- prvt type,
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                                                                -- prvt const.
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      File_Status : in     File_Status_Type := Init_Status);    -- Grandparent
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                                                                -- prvt type,
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                                                                -- prvt const.
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end CA11011_0.CA11011_1.CA11011_2;   -- Package OS.File_Manager.Internals
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     --=================================================================--
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                                     -- Package Body OS.File_Manager.Internals
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package body CA11011_0.CA11011_1.CA11011_2 is
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   procedure Create
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     (Key         : in     File_Descriptor_Type;
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      File_Name   : in     File_Name_Type   := Get_File_Name;
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      File_Mode   : in     File_Mode_Type   := Init_Mode;
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      File_Access : in     Permission_Type  := Init_Permission;
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      File_Status : in     File_Status_Type := Init_Status) is
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   begin
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      Private_File_Counter := Private_File_Counter + 1;
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      File_Table(Key).Descriptor     := Key;            -- Grandparent object.
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      File_Table(Key).Name           := File_Name;
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      File_Table(Key).Mode           := File_Mode;
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      File_Table(Key).Acct_Access    := File_Access;
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      File_Table(Key).Current_Status := File_Status;
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   end Create;
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end CA11011_0.CA11011_1.CA11011_2;   -- Package body OS.File_Manager.Internals
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     --=================================================================--
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with CA11011_0.CA11011_1.CA11011_2;  -- with Child OS.File_Manager.Internals
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package body CA11011_0.CA11011_1 is  -- Package body OS.File_Manager
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   package Internal renames CA11011_0.CA11011_1.CA11011_2;
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   -- This subprogram utilizes a call to a subprogram contained in a private
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   -- child to perform the actual processing.
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   procedure Create_File (File_Key : in File_Descriptor_Type) is
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   begin
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      Internal.Create (Key => File_Key);  -- Other parameters are defaults,
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                                          -- since they are of private types
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                                          -- from the parent package.
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                                          -- File_Descriptor_Type is private,
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                                          -- but declared in visible part of
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                                          -- parent spec.
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   end Create_File;
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end CA11011_0.CA11011_1;        -- Package body OS.File_Manager
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     --=================================================================--
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with CA11011_0.CA11011_1;       -- with public Child Package OS.File_Manager
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with Report;
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procedure CA11011 is
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   package OS           renames CA11011_0;
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   package File_Manager renames CA11011_0.CA11011_1;
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   Data_Base_File_Key : OS.File_Descriptor_Type := OS.First_File;
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   TC_Status          : Boolean := False;
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begin
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   -- This test indicates one approach to file management operations.
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   -- It is not intended to demonstrate full functionality, but rather
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   -- that the use of a private child package can provide a solution
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   -- to a typical user situation.
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   Report.Test ("CA11011", "Check that a private child package can use "   &
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                           "entities declared in the private part of the " &
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                           "parent unit of its parent unit");
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   OS.Verify_Initial_Conditions (Data_Base_File_Key, TC_Status);
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   if not TC_Status then
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      Report.Failed ("Initial condition failure");
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   end if;
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   -- Perform file initializations.
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   File_Manager.Create_File (File_Key => Data_Base_File_Key);
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   TC_Status := OS.Final_Conditions_Valid (Data_Base_File_Key);
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   if not TC_Status then
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      Report.Failed ("Bad status return from Create_File");
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   end if;
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   Report.Result;
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end CA11011;

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