-- FC70C00.A
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-- FC70C00.A
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--
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--
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-- Grant of Unlimited Rights
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-- Grant of Unlimited Rights
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--
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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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-- 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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-- 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 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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-- 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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-- 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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-- 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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-- 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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-- 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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-- any manner and for any purpose whatsoever, and to have or permit others
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-- to do so.
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-- to do so.
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--
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--
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-- DISCLAIMER
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-- DISCLAIMER
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--
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--
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-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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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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-- 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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-- 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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-- 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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-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--*
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--
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--
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-- FOUNDATION DESCRIPTION:
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-- FOUNDATION DESCRIPTION:
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-- This foundation defines a generic list abstraction in two packages.
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-- This foundation defines a generic list abstraction in two packages.
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-- The first package declares the types, the second declares the
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-- The first package declares the types, the second declares the
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-- operations. List elements can be of any (nonlimited) type. Lists are
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-- operations. List elements can be of any (nonlimited) type. Lists are
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-- implemented as singly linked lists. Access to list elements is
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-- implemented as singly linked lists. Access to list elements is
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-- sequential. For each list, pointers are maintained to the first and
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-- sequential. For each list, pointers are maintained to the first and
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-- last elements in the list, as well as the next element to be accessed.
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-- last elements in the list, as well as the next element to be accessed.
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--
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--
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-- CHANGE HISTORY:
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-- CHANGE HISTORY:
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-- 06 Dec 94 SAIC ACVC 2.0
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-- 06 Dec 94 SAIC ACVC 2.0
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--
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--
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--!
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--!
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generic
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generic
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type Element_Type is private; -- List elems may be of any nonlimited type.
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type Element_Type is private; -- List elems may be of any nonlimited type.
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package FC70C00_0 is -- List abstraction.
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package FC70C00_0 is -- List abstraction.
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type Node_Type;
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type Node_Type;
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type Node_Pointer is access Node_Type;
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type Node_Pointer is access Node_Type;
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type Node_Type is record
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type Node_Type is record
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Item : Element_Type;
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Item : Element_Type;
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Next : Node_Pointer;
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Next : Node_Pointer;
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end record;
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end record;
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type List_Type is record
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type List_Type is record
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First : Node_Pointer;
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First : Node_Pointer;
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Current : Node_Pointer;
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Current : Node_Pointer;
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Last : Node_Pointer;
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Last : Node_Pointer;
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end record;
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end record;
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end FC70C00_0;
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end FC70C00_0;
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--==================================================================--
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--==================================================================--
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-- No body for FC70C00_0;
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-- No body for FC70C00_0;
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--==================================================================--
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--==================================================================--
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with FC70C00_0; -- List abstraction.
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with FC70C00_0; -- List abstraction.
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generic
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generic
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with package List_Mgr is new FC70C00_0 (<>);
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with package List_Mgr is new FC70C00_0 (<>);
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package FC70C00_1 is -- Basic list operations.
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package FC70C00_1 is -- Basic list operations.
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-- Return true if current element is last in the list.
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-- Return true if current element is last in the list.
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function End_Of_List (L : List_Mgr.List_Type) return Boolean;
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function End_Of_List (L : List_Mgr.List_Type) return Boolean;
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-- Set "current" pointer to first list element.
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-- Set "current" pointer to first list element.
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procedure Reset (L : in out List_Mgr.List_Type);
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procedure Reset (L : in out List_Mgr.List_Type);
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end FC70C00_1;
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end FC70C00_1;
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--==================================================================--
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--==================================================================--
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package body FC70C00_1 is
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package body FC70C00_1 is
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function End_Of_List (L : List_Mgr.List_Type) return Boolean is
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function End_Of_List (L : List_Mgr.List_Type) return Boolean is
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use List_Mgr; -- Renders "=" directly visible.
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use List_Mgr; -- Renders "=" directly visible.
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begin
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begin
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return (L.Current = null);
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return (L.Current = null);
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end End_Of_List;
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end End_Of_List;
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procedure Reset (L : in out List_Mgr.List_Type) is
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procedure Reset (L : in out List_Mgr.List_Type) is
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begin
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begin
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L.Current := L.First; -- Set "current" pointer to first
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L.Current := L.First; -- Set "current" pointer to first
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end Reset; -- list element.
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end Reset; -- list element.
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end FC70C00_1;
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end FC70C00_1;
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