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1 294 jeremybenn
-- CA11008.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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--      visible part of its parent unit.
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--
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-- TEST DESCRIPTION:
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--      Declare a parent package containing types and objects used
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--      by the system. Declare a private child package that uses the parent
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--      components to provide functionality to the system.
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--
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--      The tagged file type defined in the parent has defaults for all
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--      component fields.  Prior to initialization, these values are checked
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--      to ensure a correct start condition.  The initial subprogram is
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--      called, which utilizes the functionality provided in the private
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--      child package.  This subprogram changes the fields of the file object
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--      to something other than the default values, and this process is then
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--      verified at the conclusion of the test.
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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 CA11008_0 is               -- Package OS.
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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, Bypass);
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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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   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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   Max_Files          : constant File_Descriptor_Type := 100;
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   Constant_Name      : constant File_Name_Type       := "AdaFileName";
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   File_Counter       : Integer                       := 0;
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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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   --
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   function Get_File_Name return File_Name_Type;
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   function Initialize_File return File_Descriptor_Type;
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end CA11008_0;                     -- Package OS.
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     --=================================================================--
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-- Subprograms that perform the actual file operations are contained in a
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-- private package so that they are not accessible to any client.
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private package CA11008_0.CA11008_1 is  -- Package OS.Internals
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   Private_File_Counter : Integer renames File_Counter;          -- Parent
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                                                                 -- object.
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   function Initialize
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     (File_Name : File_Name_Type := Get_File_Name;      -- Parent function.
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      File_Mode : File_Mode_Type := Read_Write)         -- Parent literal.
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     return File_Descriptor_Type;                       -- Parent type.
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end CA11008_0.CA11008_1;             -- Package OS.Internals
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     --=================================================================--
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package body CA11008_0.CA11008_1 is  -- Package body OS.Internals
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   function Next_Available_File return File_Descriptor_Type is
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   begin
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      Private_File_Counter := Private_File_Counter + 1;
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      return (File_Descriptor_Type(File_Counter));
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   end Next_Available_File;
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   -----------------------------------------------------------------
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   function Initialize
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     (File_Name : File_Name_Type := Get_File_Name; -- Parent function
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      File_Mode : File_Mode_Type := Read_Write)    -- Parent literal
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     return File_Descriptor_Type is                -- Parent type
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      Number : File_Descriptor_Type;
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   begin
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      Number := Next_Available_File;
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      File_Table(Number).Descriptor := Number;     -- Parent object
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      File_Table(Number).Name := File_Name;        -- Default parameter value
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      File_Table(Number).Mode := File_Mode;        -- Default parameter value
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      File_Table(Number).Acct_Access := User;
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      File_Table(Number).Current_Status := Open;
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      return (Number);
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   end Initialize;
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end CA11008_0.CA11008_1;           -- Package body OS.Internals
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     --=================================================================--
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with CA11008_0.CA11008_1;          -- Private child package "withed" by
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                                   -- parent body.
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package body CA11008_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 (Constant_Name);   -- Of course if this was a real function, the
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   end Get_File_Name;           -- user would be asked to input a name, or
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                                -- there would be some type of similar process.
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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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   function Initialize_File return File_Descriptor_Type is
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   begin
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     return (CA11008_0.CA11008_1.Initialize);    -- No parameters are needed,
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                                                 -- since defaults have been
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                                                 -- provided.
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   end Initialize_File;
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end CA11008_0;                         -- Package body OS
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     --=================================================================--
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with CA11008_0;                        -- with Package OS.
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with Report;
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procedure CA11008 is
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   package OS renames CA11008_0;
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   use OS;
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   Ada_File_Key : File_Descriptor_Type := Default_Descriptor;
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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 user situation, that being the implementation of certain functions
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   -- being provided in a child package, with the parent package body
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   -- utilizing these implementations.
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   Report.Test ("CA11008", "Check that a private child package can use "   &
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                           "entities declared in the visible part of its " &
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                           "parent unit");
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   -- Check initial conditions of the first entry in the file table.
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   -- These are all default values provided in the declaration of the
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   -- type File_Type.
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   if (Ada_File_Key                 /= Default_Descriptor)  or else
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      (File_Table(1).Descriptor     /= (Default_Descriptor) or
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      (File_Table(1).Name           /= Default_Filename))   or else
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      (File_Table(1).Acct_Access    /= (Default_Permission) or
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      (File_Table(1).Mode           /= Default_Mode))       or else
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      (File_Table(1).Current_Status /= Default_Status)
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   then
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      Report.Failed ("Initial condition failure");
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   end if;
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   -- Call the initialization function.  This will result in the resetting
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   -- of the fields associated with the first entry in the File_Table (this
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   -- is the first call of Initialize_File).
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   -- No parameters are necessary for this call, due to the default values
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   -- provided in the private child package routine Initialize.
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   Ada_File_Key := Initialize_File;
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   -- Verify that the initial conditions of the file table component have
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   -- been properly modified by the initialization function.
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   if not ((File_Table(1).Descriptor     = Ada_File_Key)         and then
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           (File_Table(1).Name           = Constant_Name) and then
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           (File_Table(1).Acct_Access    = User)              and then
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           not ((File_Table(1).Mode      = Default_Mode)      or else
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                (File_Table(1).Current_Status = Default_Status)))
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   then
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      Report.Failed ("Initialization processing failure");
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   end if;
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   Report.Result;
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end CA11008;

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