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1 720 jeremybenn
-- F730A000.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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-- FOUNDATION DESCRIPTION:
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--      This file simulates a generic linked list abstraction for use in tests
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--      covering tagged types and type extensions.
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--
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-- TEST FILES:
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--      This foundation consists of the following files:
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--
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--      => F730A000.A
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--         F730A001.A
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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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--      03 Aug 96   SAIC    ACVC 2.1: Modified prologue. Added pragma
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--                          Elaborate_Body. Removed extraneous record
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--                          extension.
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--
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--!
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generic  -- Singly-linked list abstraction.
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   type Parent_Type is tagged private;                   -- Actual is parent
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package F730A000 is                                      -- tagged type.
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   pragma Elaborate_Body;
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   -- Declarations for private linked list nodes:
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   type Priv_Node_Type is new Parent_Type with private;  -- Private extension
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                                                         -- of parent type.
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   -- Inherits primitive operations of actual parameter corresponding
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   -- to Parent_Type.
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   type Priv_Node_Ptr is access Priv_Node_Type;
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   -- Add node at head of list.
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   procedure Add (Item : in     Priv_Node_Ptr;
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                  Head : in out Priv_Node_Ptr);
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   -- Remove node from head of list and return it.
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   procedure Remove (Head : in out Priv_Node_Ptr;
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                     Item :    out Priv_Node_Ptr);
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private
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   type Priv_Node_Type is new Parent_Type with record
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      Next : Priv_Node_Ptr := null;
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   end record;
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end F730A000;
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     --==================================================================--
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package body F730A000 is  -- Singly-linked list abstraction.
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   procedure Add (Item : in     Priv_Node_Ptr;
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                  Head : in out Priv_Node_Ptr) is
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   begin
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      if Item /= null then
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         Item.Next := Head;
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         Head := Item;
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      end if;
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   end Add;
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   procedure Remove (Head : in out Priv_Node_Ptr;
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                     Item :    out Priv_Node_Ptr) is
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   begin
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      Item := Head;
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      if Head /= null then
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         Head := Head.Next;
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      end if;
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   end Remove;
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end F730A000;

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