1687 lines
46 KiB
Ada
1687 lines
46 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT LIBRARY COMPONENTS --
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-- --
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-- ADA.CONTAINERS.INDEFINITE_ORDERED_MAPS --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2004-2015, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- This unit was originally developed by Matthew J Heaney. --
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------------------------------------------------------------------------------
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with Ada.Unchecked_Deallocation;
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with Ada.Containers.Helpers; use Ada.Containers.Helpers;
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with Ada.Containers.Red_Black_Trees.Generic_Operations;
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pragma Elaborate_All (Ada.Containers.Red_Black_Trees.Generic_Operations);
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with Ada.Containers.Red_Black_Trees.Generic_Keys;
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pragma Elaborate_All (Ada.Containers.Red_Black_Trees.Generic_Keys);
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with System; use type System.Address;
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package body Ada.Containers.Indefinite_Ordered_Maps is
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pragma Suppress (All_Checks);
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pragma Warnings (Off, "variable ""Busy*"" is not referenced");
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pragma Warnings (Off, "variable ""Lock*"" is not referenced");
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-- See comment in Ada.Containers.Helpers
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-----------------------------
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-- Node Access Subprograms --
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-----------------------------
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-- These subprograms provide a functional interface to access fields
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-- of a node, and a procedural interface for modifying these values.
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function Color (Node : Node_Access) return Color_Type;
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pragma Inline (Color);
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function Left (Node : Node_Access) return Node_Access;
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pragma Inline (Left);
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function Parent (Node : Node_Access) return Node_Access;
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pragma Inline (Parent);
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function Right (Node : Node_Access) return Node_Access;
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pragma Inline (Right);
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procedure Set_Parent (Node : Node_Access; Parent : Node_Access);
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pragma Inline (Set_Parent);
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procedure Set_Left (Node : Node_Access; Left : Node_Access);
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pragma Inline (Set_Left);
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procedure Set_Right (Node : Node_Access; Right : Node_Access);
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pragma Inline (Set_Right);
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procedure Set_Color (Node : Node_Access; Color : Color_Type);
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pragma Inline (Set_Color);
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-----------------------
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-- Local Subprograms --
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-----------------------
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function Copy_Node (Source : Node_Access) return Node_Access;
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pragma Inline (Copy_Node);
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procedure Free (X : in out Node_Access);
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function Is_Equal_Node_Node
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(L, R : Node_Access) return Boolean;
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pragma Inline (Is_Equal_Node_Node);
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function Is_Greater_Key_Node
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(Left : Key_Type;
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Right : Node_Access) return Boolean;
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pragma Inline (Is_Greater_Key_Node);
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function Is_Less_Key_Node
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(Left : Key_Type;
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Right : Node_Access) return Boolean;
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pragma Inline (Is_Less_Key_Node);
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--------------------------
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-- Local Instantiations --
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--------------------------
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package Tree_Operations is
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new Red_Black_Trees.Generic_Operations (Tree_Types);
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procedure Delete_Tree is
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new Tree_Operations.Generic_Delete_Tree (Free);
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function Copy_Tree is
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new Tree_Operations.Generic_Copy_Tree (Copy_Node, Delete_Tree);
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use Tree_Operations;
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package Key_Ops is
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new Red_Black_Trees.Generic_Keys
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(Tree_Operations => Tree_Operations,
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Key_Type => Key_Type,
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Is_Less_Key_Node => Is_Less_Key_Node,
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Is_Greater_Key_Node => Is_Greater_Key_Node);
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procedure Free_Key is
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new Ada.Unchecked_Deallocation (Key_Type, Key_Access);
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procedure Free_Element is
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new Ada.Unchecked_Deallocation (Element_Type, Element_Access);
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function Is_Equal is
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new Tree_Operations.Generic_Equal (Is_Equal_Node_Node);
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---------
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-- "<" --
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---------
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function "<" (Left, Right : Cursor) return Boolean is
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begin
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if Checks and then Left.Node = null then
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raise Constraint_Error with "Left cursor of ""<"" equals No_Element";
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end if;
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if Checks and then Right.Node = null then
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raise Constraint_Error with "Right cursor of ""<"" equals No_Element";
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end if;
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if Checks and then Left.Node.Key = null then
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raise Program_Error with "Left cursor in ""<"" is bad";
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end if;
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if Checks and then Right.Node.Key = null then
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raise Program_Error with "Right cursor in ""<"" is bad";
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end if;
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pragma Assert (Vet (Left.Container.Tree, Left.Node),
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"Left cursor in ""<"" is bad");
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pragma Assert (Vet (Right.Container.Tree, Right.Node),
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"Right cursor in ""<"" is bad");
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return Left.Node.Key.all < Right.Node.Key.all;
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end "<";
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function "<" (Left : Cursor; Right : Key_Type) return Boolean is
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begin
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if Checks and then Left.Node = null then
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raise Constraint_Error with "Left cursor of ""<"" equals No_Element";
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end if;
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if Checks and then Left.Node.Key = null then
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raise Program_Error with "Left cursor in ""<"" is bad";
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end if;
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pragma Assert (Vet (Left.Container.Tree, Left.Node),
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"Left cursor in ""<"" is bad");
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return Left.Node.Key.all < Right;
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end "<";
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function "<" (Left : Key_Type; Right : Cursor) return Boolean is
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begin
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if Checks and then Right.Node = null then
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raise Constraint_Error with "Right cursor of ""<"" equals No_Element";
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end if;
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if Checks and then Right.Node.Key = null then
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raise Program_Error with "Right cursor in ""<"" is bad";
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end if;
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pragma Assert (Vet (Right.Container.Tree, Right.Node),
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"Right cursor in ""<"" is bad");
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return Left < Right.Node.Key.all;
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end "<";
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---------
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-- "=" --
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---------
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function "=" (Left, Right : Map) return Boolean is
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begin
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return Is_Equal (Left.Tree, Right.Tree);
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end "=";
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---------
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-- ">" --
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---------
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function ">" (Left, Right : Cursor) return Boolean is
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begin
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if Checks and then Left.Node = null then
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raise Constraint_Error with "Left cursor of "">"" equals No_Element";
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end if;
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if Checks and then Right.Node = null then
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raise Constraint_Error with "Right cursor of "">"" equals No_Element";
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end if;
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if Checks and then Left.Node.Key = null then
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raise Program_Error with "Left cursor in ""<"" is bad";
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end if;
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if Checks and then Right.Node.Key = null then
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raise Program_Error with "Right cursor in ""<"" is bad";
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end if;
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pragma Assert (Vet (Left.Container.Tree, Left.Node),
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"Left cursor in "">"" is bad");
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pragma Assert (Vet (Right.Container.Tree, Right.Node),
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"Right cursor in "">"" is bad");
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return Right.Node.Key.all < Left.Node.Key.all;
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end ">";
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function ">" (Left : Cursor; Right : Key_Type) return Boolean is
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begin
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if Checks and then Left.Node = null then
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raise Constraint_Error with "Left cursor of "">"" equals No_Element";
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end if;
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if Checks and then Left.Node.Key = null then
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raise Program_Error with "Left cursor in ""<"" is bad";
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end if;
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pragma Assert (Vet (Left.Container.Tree, Left.Node),
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"Left cursor in "">"" is bad");
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return Right < Left.Node.Key.all;
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end ">";
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function ">" (Left : Key_Type; Right : Cursor) return Boolean is
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begin
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if Checks and then Right.Node = null then
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raise Constraint_Error with "Right cursor of "">"" equals No_Element";
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end if;
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if Checks and then Right.Node.Key = null then
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raise Program_Error with "Right cursor in ""<"" is bad";
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end if;
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pragma Assert (Vet (Right.Container.Tree, Right.Node),
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"Right cursor in "">"" is bad");
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return Right.Node.Key.all < Left;
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end ">";
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------------
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-- Adjust --
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------------
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procedure Adjust is new Tree_Operations.Generic_Adjust (Copy_Tree);
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procedure Adjust (Container : in out Map) is
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begin
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Adjust (Container.Tree);
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end Adjust;
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------------
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-- Assign --
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------------
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procedure Assign (Target : in out Map; Source : Map) is
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procedure Insert_Item (Node : Node_Access);
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pragma Inline (Insert_Item);
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procedure Insert_Items is
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new Tree_Operations.Generic_Iteration (Insert_Item);
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-----------------
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-- Insert_Item --
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-----------------
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procedure Insert_Item (Node : Node_Access) is
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begin
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Target.Insert (Key => Node.Key.all, New_Item => Node.Element.all);
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end Insert_Item;
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-- Start of processing for Assign
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begin
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if Target'Address = Source'Address then
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return;
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end if;
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Target.Clear;
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Insert_Items (Source.Tree);
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end Assign;
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-------------
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-- Ceiling --
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-------------
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function Ceiling (Container : Map; Key : Key_Type) return Cursor is
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Node : constant Node_Access := Key_Ops.Ceiling (Container.Tree, Key);
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begin
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return (if Node = null then No_Element
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else Cursor'(Container'Unrestricted_Access, Node));
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end Ceiling;
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-----------
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-- Clear --
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-----------
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procedure Clear is new Tree_Operations.Generic_Clear (Delete_Tree);
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procedure Clear (Container : in out Map) is
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begin
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Clear (Container.Tree);
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end Clear;
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-----------
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-- Color --
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-----------
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function Color (Node : Node_Access) return Color_Type is
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begin
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return Node.Color;
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end Color;
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------------------------
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-- Constant_Reference --
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------------------------
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function Constant_Reference
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(Container : aliased Map;
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Position : Cursor) return Constant_Reference_Type
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is
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begin
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if Checks and then Position.Container = null then
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raise Constraint_Error with
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"Position cursor has no element";
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end if;
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if Checks and then Position.Container /= Container'Unrestricted_Access
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then
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raise Program_Error with
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"Position cursor designates wrong map";
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end if;
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if Checks and then Position.Node.Element = null then
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raise Program_Error with "Node has no element";
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end if;
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pragma Assert (Vet (Container.Tree, Position.Node),
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"Position cursor in Constant_Reference is bad");
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declare
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TC : constant Tamper_Counts_Access :=
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Container.Tree.TC'Unrestricted_Access;
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begin
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return R : constant Constant_Reference_Type :=
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(Element => Position.Node.Element.all'Access,
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Control => (Controlled with TC))
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do
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Lock (TC.all);
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end return;
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end;
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end Constant_Reference;
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function Constant_Reference
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(Container : aliased Map;
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Key : Key_Type) return Constant_Reference_Type
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is
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Node : constant Node_Access := Key_Ops.Find (Container.Tree, Key);
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begin
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if Checks and then Node = null then
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raise Constraint_Error with "key not in map";
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end if;
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if Checks and then Node.Element = null then
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raise Program_Error with "Node has no element";
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end if;
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declare
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TC : constant Tamper_Counts_Access :=
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Container.Tree.TC'Unrestricted_Access;
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begin
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return R : constant Constant_Reference_Type :=
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(Element => Node.Element.all'Access,
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Control => (Controlled with TC))
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do
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Lock (TC.all);
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end return;
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end;
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end Constant_Reference;
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--------------
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-- Contains --
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--------------
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function Contains (Container : Map; Key : Key_Type) return Boolean is
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begin
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return Find (Container, Key) /= No_Element;
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end Contains;
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----------
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-- Copy --
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----------
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function Copy (Source : Map) return Map is
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begin
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return Target : Map do
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Target.Assign (Source);
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end return;
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end Copy;
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---------------
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-- Copy_Node --
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---------------
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function Copy_Node (Source : Node_Access) return Node_Access is
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K : Key_Access := new Key_Type'(Source.Key.all);
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E : Element_Access;
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begin
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E := new Element_Type'(Source.Element.all);
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return new Node_Type'(Parent => null,
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Left => null,
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Right => null,
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Color => Source.Color,
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Key => K,
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Element => E);
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exception
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when others =>
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Free_Key (K);
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Free_Element (E);
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raise;
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end Copy_Node;
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------------
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-- Delete --
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------------
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procedure Delete
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(Container : in out Map;
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Position : in out Cursor)
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is
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begin
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if Checks and then Position.Node = null then
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raise Constraint_Error with
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"Position cursor of Delete equals No_Element";
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end if;
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if Checks and then
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(Position.Node.Key = null or else Position.Node.Element = null)
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then
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raise Program_Error with "Position cursor of Delete is bad";
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end if;
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if Checks and then Position.Container /= Container'Unrestricted_Access
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then
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raise Program_Error with
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"Position cursor of Delete designates wrong map";
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end if;
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pragma Assert (Vet (Container.Tree, Position.Node),
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"Position cursor of Delete is bad");
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Tree_Operations.Delete_Node_Sans_Free (Container.Tree, Position.Node);
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Free (Position.Node);
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Position.Container := null;
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end Delete;
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procedure Delete (Container : in out Map; Key : Key_Type) is
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X : Node_Access := Key_Ops.Find (Container.Tree, Key);
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begin
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if Checks and then X = null then
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raise Constraint_Error with "key not in map";
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end if;
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Delete_Node_Sans_Free (Container.Tree, X);
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Free (X);
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end Delete;
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------------------
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-- Delete_First --
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------------------
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procedure Delete_First (Container : in out Map) is
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X : Node_Access := Container.Tree.First;
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begin
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if X /= null then
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Tree_Operations.Delete_Node_Sans_Free (Container.Tree, X);
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Free (X);
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end if;
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end Delete_First;
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-----------------
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-- Delete_Last --
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-----------------
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procedure Delete_Last (Container : in out Map) is
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X : Node_Access := Container.Tree.Last;
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begin
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if X /= null then
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Tree_Operations.Delete_Node_Sans_Free (Container.Tree, X);
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Free (X);
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end if;
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end Delete_Last;
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-------------
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-- Element --
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-------------
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function Element (Position : Cursor) return Element_Type is
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begin
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if Checks and then Position.Node = null then
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raise Constraint_Error with
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"Position cursor of function Element equals No_Element";
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end if;
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if Checks and then Position.Node.Element = null then
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raise Program_Error with
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"Position cursor of function Element is bad";
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end if;
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pragma Assert (Vet (Position.Container.Tree, Position.Node),
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"Position cursor of function Element is bad");
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return Position.Node.Element.all;
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end Element;
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function Element (Container : Map; Key : Key_Type) return Element_Type is
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Node : constant Node_Access := Key_Ops.Find (Container.Tree, Key);
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begin
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if Checks and then Node = null then
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raise Constraint_Error with "key not in map";
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end if;
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return Node.Element.all;
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end Element;
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|
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---------------------
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-- Equivalent_Keys --
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---------------------
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function Equivalent_Keys (Left, Right : Key_Type) return Boolean is
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begin
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return (if Left < Right or else Right < Left then False else True);
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end Equivalent_Keys;
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|
|
-------------
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-- Exclude --
|
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-------------
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|
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procedure Exclude (Container : in out Map; Key : Key_Type) is
|
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X : Node_Access := Key_Ops.Find (Container.Tree, Key);
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begin
|
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if X /= null then
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Tree_Operations.Delete_Node_Sans_Free (Container.Tree, X);
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Free (X);
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end if;
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end Exclude;
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|
|
--------------
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-- Finalize --
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|
--------------
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|
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procedure Finalize (Object : in out Iterator) is
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begin
|
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if Object.Container /= null then
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Unbusy (Object.Container.Tree.TC);
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end if;
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end Finalize;
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|
|
----------
|
|
-- Find --
|
|
----------
|
|
|
|
function Find (Container : Map; Key : Key_Type) return Cursor is
|
|
Node : constant Node_Access := Key_Ops.Find (Container.Tree, Key);
|
|
begin
|
|
return (if Node = null then No_Element
|
|
else Cursor'(Container'Unrestricted_Access, Node));
|
|
end Find;
|
|
|
|
-----------
|
|
-- First --
|
|
-----------
|
|
|
|
function First (Container : Map) return Cursor is
|
|
T : Tree_Type renames Container.Tree;
|
|
begin
|
|
return (if T.First = null then No_Element
|
|
else Cursor'(Container'Unrestricted_Access, T.First));
|
|
end First;
|
|
|
|
function First (Object : Iterator) return Cursor is
|
|
begin
|
|
-- The value of the iterator object's Node component influences the
|
|
-- behavior of the First (and Last) selector function.
|
|
|
|
-- When the Node component is null, this means the iterator object was
|
|
-- constructed without a start expression, in which case the (forward)
|
|
-- iteration starts from the (logical) beginning of the entire sequence
|
|
-- of items (corresponding to Container.First for a forward iterator).
|
|
|
|
-- Otherwise, this is iteration over a partial sequence of items. When
|
|
-- the Node component is non-null, the iterator object was constructed
|
|
-- with a start expression, that specifies the position from which the
|
|
-- (forward) partial iteration begins.
|
|
|
|
if Object.Node = null then
|
|
return Object.Container.First;
|
|
else
|
|
return Cursor'(Object.Container, Object.Node);
|
|
end if;
|
|
end First;
|
|
|
|
-------------------
|
|
-- First_Element --
|
|
-------------------
|
|
|
|
function First_Element (Container : Map) return Element_Type is
|
|
T : Tree_Type renames Container.Tree;
|
|
begin
|
|
if Checks and then T.First = null then
|
|
raise Constraint_Error with "map is empty";
|
|
end if;
|
|
|
|
return T.First.Element.all;
|
|
end First_Element;
|
|
|
|
---------------
|
|
-- First_Key --
|
|
---------------
|
|
|
|
function First_Key (Container : Map) return Key_Type is
|
|
T : Tree_Type renames Container.Tree;
|
|
begin
|
|
if Checks and then T.First = null then
|
|
raise Constraint_Error with "map is empty";
|
|
end if;
|
|
|
|
return T.First.Key.all;
|
|
end First_Key;
|
|
|
|
-----------
|
|
-- Floor --
|
|
-----------
|
|
|
|
function Floor (Container : Map; Key : Key_Type) return Cursor is
|
|
Node : constant Node_Access := Key_Ops.Floor (Container.Tree, Key);
|
|
begin
|
|
return (if Node = null then No_Element
|
|
else Cursor'(Container'Unrestricted_Access, Node));
|
|
end Floor;
|
|
|
|
----------
|
|
-- Free --
|
|
----------
|
|
|
|
procedure Free (X : in out Node_Access) is
|
|
procedure Deallocate is
|
|
new Ada.Unchecked_Deallocation (Node_Type, Node_Access);
|
|
|
|
begin
|
|
if X = null then
|
|
return;
|
|
end if;
|
|
|
|
X.Parent := X;
|
|
X.Left := X;
|
|
X.Right := X;
|
|
|
|
begin
|
|
Free_Key (X.Key);
|
|
|
|
exception
|
|
when others =>
|
|
X.Key := null;
|
|
|
|
begin
|
|
Free_Element (X.Element);
|
|
exception
|
|
when others =>
|
|
X.Element := null;
|
|
end;
|
|
|
|
Deallocate (X);
|
|
raise;
|
|
end;
|
|
|
|
begin
|
|
Free_Element (X.Element);
|
|
|
|
exception
|
|
when others =>
|
|
X.Element := null;
|
|
|
|
Deallocate (X);
|
|
raise;
|
|
end;
|
|
|
|
Deallocate (X);
|
|
end Free;
|
|
|
|
------------------------
|
|
-- Get_Element_Access --
|
|
------------------------
|
|
|
|
function Get_Element_Access
|
|
(Position : Cursor) return not null Element_Access is
|
|
begin
|
|
return Position.Node.Element;
|
|
end Get_Element_Access;
|
|
|
|
-----------------
|
|
-- Has_Element --
|
|
-----------------
|
|
|
|
function Has_Element (Position : Cursor) return Boolean is
|
|
begin
|
|
return Position /= No_Element;
|
|
end Has_Element;
|
|
|
|
-------------
|
|
-- Include --
|
|
-------------
|
|
|
|
procedure Include
|
|
(Container : in out Map;
|
|
Key : Key_Type;
|
|
New_Item : Element_Type)
|
|
is
|
|
Position : Cursor;
|
|
Inserted : Boolean;
|
|
|
|
K : Key_Access;
|
|
E : Element_Access;
|
|
|
|
begin
|
|
Insert (Container, Key, New_Item, Position, Inserted);
|
|
|
|
if not Inserted then
|
|
TE_Check (Container.Tree.TC);
|
|
|
|
K := Position.Node.Key;
|
|
E := Position.Node.Element;
|
|
|
|
Position.Node.Key := new Key_Type'(Key);
|
|
|
|
declare
|
|
-- The element allocator may need an accessibility check in the
|
|
-- case the actual type is class-wide or has access discriminants
|
|
-- (see RM 4.8(10.1) and AI12-0035).
|
|
|
|
pragma Unsuppress (Accessibility_Check);
|
|
|
|
begin
|
|
Position.Node.Element := new Element_Type'(New_Item);
|
|
|
|
exception
|
|
when others =>
|
|
Free_Key (K);
|
|
raise;
|
|
end;
|
|
|
|
Free_Key (K);
|
|
Free_Element (E);
|
|
end if;
|
|
end Include;
|
|
|
|
------------
|
|
-- Insert --
|
|
------------
|
|
|
|
procedure Insert
|
|
(Container : in out Map;
|
|
Key : Key_Type;
|
|
New_Item : Element_Type;
|
|
Position : out Cursor;
|
|
Inserted : out Boolean)
|
|
is
|
|
function New_Node return Node_Access;
|
|
pragma Inline (New_Node);
|
|
|
|
procedure Insert_Post is
|
|
new Key_Ops.Generic_Insert_Post (New_Node);
|
|
|
|
procedure Insert_Sans_Hint is
|
|
new Key_Ops.Generic_Conditional_Insert (Insert_Post);
|
|
|
|
--------------
|
|
-- New_Node --
|
|
--------------
|
|
|
|
function New_Node return Node_Access is
|
|
Node : Node_Access := new Node_Type;
|
|
|
|
-- The element allocator may need an accessibility check in the case
|
|
-- the actual type is class-wide or has access discriminants (see
|
|
-- RM 4.8(10.1) and AI12-0035).
|
|
|
|
pragma Unsuppress (Accessibility_Check);
|
|
|
|
begin
|
|
Node.Key := new Key_Type'(Key);
|
|
Node.Element := new Element_Type'(New_Item);
|
|
return Node;
|
|
|
|
exception
|
|
when others =>
|
|
|
|
-- On exception, deallocate key and elem. Note that free
|
|
-- deallocates both the key and the elem.
|
|
|
|
Free (Node);
|
|
raise;
|
|
end New_Node;
|
|
|
|
-- Start of processing for Insert
|
|
|
|
begin
|
|
Insert_Sans_Hint
|
|
(Container.Tree,
|
|
Key,
|
|
Position.Node,
|
|
Inserted);
|
|
|
|
Position.Container := Container'Unrestricted_Access;
|
|
end Insert;
|
|
|
|
procedure Insert
|
|
(Container : in out Map;
|
|
Key : Key_Type;
|
|
New_Item : Element_Type)
|
|
is
|
|
Position : Cursor;
|
|
pragma Unreferenced (Position);
|
|
|
|
Inserted : Boolean;
|
|
|
|
begin
|
|
Insert (Container, Key, New_Item, Position, Inserted);
|
|
|
|
if Checks and then not Inserted then
|
|
raise Constraint_Error with "key already in map";
|
|
end if;
|
|
end Insert;
|
|
|
|
--------------
|
|
-- Is_Empty --
|
|
--------------
|
|
|
|
function Is_Empty (Container : Map) return Boolean is
|
|
begin
|
|
return Container.Tree.Length = 0;
|
|
end Is_Empty;
|
|
|
|
------------------------
|
|
-- Is_Equal_Node_Node --
|
|
------------------------
|
|
|
|
function Is_Equal_Node_Node (L, R : Node_Access) return Boolean is
|
|
begin
|
|
return (if L.Key.all < R.Key.all then False
|
|
elsif R.Key.all < L.Key.all then False
|
|
else L.Element.all = R.Element.all);
|
|
end Is_Equal_Node_Node;
|
|
|
|
-------------------------
|
|
-- Is_Greater_Key_Node --
|
|
-------------------------
|
|
|
|
function Is_Greater_Key_Node
|
|
(Left : Key_Type;
|
|
Right : Node_Access) return Boolean
|
|
is
|
|
begin
|
|
-- k > node same as node < k
|
|
|
|
return Right.Key.all < Left;
|
|
end Is_Greater_Key_Node;
|
|
|
|
----------------------
|
|
-- Is_Less_Key_Node --
|
|
----------------------
|
|
|
|
function Is_Less_Key_Node
|
|
(Left : Key_Type;
|
|
Right : Node_Access) return Boolean is
|
|
begin
|
|
return Left < Right.Key.all;
|
|
end Is_Less_Key_Node;
|
|
|
|
-------------
|
|
-- Iterate --
|
|
-------------
|
|
|
|
procedure Iterate
|
|
(Container : Map;
|
|
Process : not null access procedure (Position : Cursor))
|
|
is
|
|
procedure Process_Node (Node : Node_Access);
|
|
pragma Inline (Process_Node);
|
|
|
|
procedure Local_Iterate is
|
|
new Tree_Operations.Generic_Iteration (Process_Node);
|
|
|
|
------------------
|
|
-- Process_Node --
|
|
------------------
|
|
|
|
procedure Process_Node (Node : Node_Access) is
|
|
begin
|
|
Process (Cursor'(Container'Unrestricted_Access, Node));
|
|
end Process_Node;
|
|
|
|
Busy : With_Busy (Container.Tree.TC'Unrestricted_Access);
|
|
|
|
-- Start of processing for Iterate
|
|
|
|
begin
|
|
Local_Iterate (Container.Tree);
|
|
end Iterate;
|
|
|
|
function Iterate
|
|
(Container : Map) return Map_Iterator_Interfaces.Reversible_Iterator'Class
|
|
is
|
|
begin
|
|
-- The value of the Node component influences the behavior of the First
|
|
-- and Last selector functions of the iterator object. When the Node
|
|
-- component is null (as is the case here), this means the iterator
|
|
-- object was constructed without a start expression. This is a complete
|
|
-- iterator, meaning that the iteration starts from the (logical)
|
|
-- beginning of the sequence of items.
|
|
|
|
-- Note: For a forward iterator, Container.First is the beginning, and
|
|
-- for a reverse iterator, Container.Last is the beginning.
|
|
|
|
return It : constant Iterator :=
|
|
(Limited_Controlled with
|
|
Container => Container'Unrestricted_Access,
|
|
Node => null)
|
|
do
|
|
Busy (Container.Tree.TC'Unrestricted_Access.all);
|
|
end return;
|
|
end Iterate;
|
|
|
|
function Iterate
|
|
(Container : Map;
|
|
Start : Cursor)
|
|
return Map_Iterator_Interfaces.Reversible_Iterator'Class
|
|
is
|
|
begin
|
|
-- It was formerly the case that when Start = No_Element, the partial
|
|
-- iterator was defined to behave the same as for a complete iterator,
|
|
-- and iterate over the entire sequence of items. However, those
|
|
-- semantics were unintuitive and arguably error-prone (it is too easy
|
|
-- to accidentally create an endless loop), and so they were changed,
|
|
-- per the ARG meeting in Denver on 2011/11. However, there was no
|
|
-- consensus about what positive meaning this corner case should have,
|
|
-- and so it was decided to simply raise an exception. This does imply,
|
|
-- however, that it is not possible to use a partial iterator to specify
|
|
-- an empty sequence of items.
|
|
|
|
if Checks and then Start = No_Element then
|
|
raise Constraint_Error with
|
|
"Start position for iterator equals No_Element";
|
|
end if;
|
|
|
|
if Checks and then Start.Container /= Container'Unrestricted_Access then
|
|
raise Program_Error with
|
|
"Start cursor of Iterate designates wrong map";
|
|
end if;
|
|
|
|
pragma Assert (Vet (Container.Tree, Start.Node),
|
|
"Start cursor of Iterate is bad");
|
|
|
|
-- The value of the Node component influences the behavior of the First
|
|
-- and Last selector functions of the iterator object. When the Node
|
|
-- component is non-null (as is the case here), it means that this
|
|
-- is a partial iteration, over a subset of the complete sequence of
|
|
-- items. The iterator object was constructed with a start expression,
|
|
-- indicating the position from which the iteration begins. Note that
|
|
-- the start position has the same value irrespective of whether this
|
|
-- is a forward or reverse iteration.
|
|
|
|
return It : constant Iterator :=
|
|
(Limited_Controlled with
|
|
Container => Container'Unrestricted_Access,
|
|
Node => Start.Node)
|
|
do
|
|
Busy (Container.Tree.TC'Unrestricted_Access.all);
|
|
end return;
|
|
end Iterate;
|
|
|
|
---------
|
|
-- Key --
|
|
---------
|
|
|
|
function Key (Position : Cursor) return Key_Type is
|
|
begin
|
|
if Checks and then Position.Node = null then
|
|
raise Constraint_Error with
|
|
"Position cursor of function Key equals No_Element";
|
|
end if;
|
|
|
|
if Checks and then Position.Node.Key = null then
|
|
raise Program_Error with
|
|
"Position cursor of function Key is bad";
|
|
end if;
|
|
|
|
pragma Assert (Vet (Position.Container.Tree, Position.Node),
|
|
"Position cursor of function Key is bad");
|
|
|
|
return Position.Node.Key.all;
|
|
end Key;
|
|
|
|
----------
|
|
-- Last --
|
|
----------
|
|
|
|
function Last (Container : Map) return Cursor is
|
|
T : Tree_Type renames Container.Tree;
|
|
begin
|
|
return (if T.Last = null then No_Element
|
|
else Cursor'(Container'Unrestricted_Access, T.Last));
|
|
end Last;
|
|
|
|
function Last (Object : Iterator) return Cursor is
|
|
begin
|
|
-- The value of the iterator object's Node component influences the
|
|
-- behavior of the Last (and First) selector function.
|
|
|
|
-- When the Node component is null, this means the iterator object was
|
|
-- constructed without a start expression, in which case the (reverse)
|
|
-- iteration starts from the (logical) beginning of the entire sequence
|
|
-- (corresponding to Container.Last, for a reverse iterator).
|
|
|
|
-- Otherwise, this is iteration over a partial sequence of items. When
|
|
-- the Node component is non-null, the iterator object was constructed
|
|
-- with a start expression, that specifies the position from which the
|
|
-- (reverse) partial iteration begins.
|
|
|
|
if Object.Node = null then
|
|
return Object.Container.Last;
|
|
else
|
|
return Cursor'(Object.Container, Object.Node);
|
|
end if;
|
|
end Last;
|
|
|
|
------------------
|
|
-- Last_Element --
|
|
------------------
|
|
|
|
function Last_Element (Container : Map) return Element_Type is
|
|
T : Tree_Type renames Container.Tree;
|
|
|
|
begin
|
|
if Checks and then T.Last = null then
|
|
raise Constraint_Error with "map is empty";
|
|
end if;
|
|
|
|
return T.Last.Element.all;
|
|
end Last_Element;
|
|
|
|
--------------
|
|
-- Last_Key --
|
|
--------------
|
|
|
|
function Last_Key (Container : Map) return Key_Type is
|
|
T : Tree_Type renames Container.Tree;
|
|
|
|
begin
|
|
if Checks and then T.Last = null then
|
|
raise Constraint_Error with "map is empty";
|
|
end if;
|
|
|
|
return T.Last.Key.all;
|
|
end Last_Key;
|
|
|
|
----------
|
|
-- Left --
|
|
----------
|
|
|
|
function Left (Node : Node_Access) return Node_Access is
|
|
begin
|
|
return Node.Left;
|
|
end Left;
|
|
|
|
------------
|
|
-- Length --
|
|
------------
|
|
|
|
function Length (Container : Map) return Count_Type is
|
|
begin
|
|
return Container.Tree.Length;
|
|
end Length;
|
|
|
|
----------
|
|
-- Move --
|
|
----------
|
|
|
|
procedure Move is new Tree_Operations.Generic_Move (Clear);
|
|
|
|
procedure Move (Target : in out Map; Source : in out Map) is
|
|
begin
|
|
Move (Target => Target.Tree, Source => Source.Tree);
|
|
end Move;
|
|
|
|
----------
|
|
-- Next --
|
|
----------
|
|
|
|
function Next (Position : Cursor) return Cursor is
|
|
begin
|
|
if Position = No_Element then
|
|
return No_Element;
|
|
end if;
|
|
|
|
pragma Assert (Position.Node /= null);
|
|
pragma Assert (Position.Node.Key /= null);
|
|
pragma Assert (Position.Node.Element /= null);
|
|
pragma Assert (Vet (Position.Container.Tree, Position.Node),
|
|
"Position cursor of Next is bad");
|
|
|
|
declare
|
|
Node : constant Node_Access :=
|
|
Tree_Operations.Next (Position.Node);
|
|
begin
|
|
return (if Node = null then No_Element
|
|
else Cursor'(Position.Container, Node));
|
|
end;
|
|
end Next;
|
|
|
|
procedure Next (Position : in out Cursor) is
|
|
begin
|
|
Position := Next (Position);
|
|
end Next;
|
|
|
|
function Next
|
|
(Object : Iterator;
|
|
Position : Cursor) return Cursor
|
|
is
|
|
begin
|
|
if Position.Container = null then
|
|
return No_Element;
|
|
end if;
|
|
|
|
if Checks and then Position.Container /= Object.Container then
|
|
raise Program_Error with
|
|
"Position cursor of Next designates wrong map";
|
|
end if;
|
|
|
|
return Next (Position);
|
|
end Next;
|
|
|
|
------------
|
|
-- Parent --
|
|
------------
|
|
|
|
function Parent (Node : Node_Access) return Node_Access is
|
|
begin
|
|
return Node.Parent;
|
|
end Parent;
|
|
|
|
--------------
|
|
-- Previous --
|
|
--------------
|
|
|
|
function Previous (Position : Cursor) return Cursor is
|
|
begin
|
|
if Position = No_Element then
|
|
return No_Element;
|
|
end if;
|
|
|
|
pragma Assert (Position.Node /= null);
|
|
pragma Assert (Position.Node.Key /= null);
|
|
pragma Assert (Position.Node.Element /= null);
|
|
pragma Assert (Vet (Position.Container.Tree, Position.Node),
|
|
"Position cursor of Previous is bad");
|
|
|
|
declare
|
|
Node : constant Node_Access :=
|
|
Tree_Operations.Previous (Position.Node);
|
|
begin
|
|
return (if Node = null then No_Element
|
|
else Cursor'(Position.Container, Node));
|
|
end;
|
|
end Previous;
|
|
|
|
procedure Previous (Position : in out Cursor) is
|
|
begin
|
|
Position := Previous (Position);
|
|
end Previous;
|
|
|
|
function Previous
|
|
(Object : Iterator;
|
|
Position : Cursor) return Cursor
|
|
is
|
|
begin
|
|
if Position.Container = null then
|
|
return No_Element;
|
|
end if;
|
|
|
|
if Checks and then Position.Container /= Object.Container then
|
|
raise Program_Error with
|
|
"Position cursor of Previous designates wrong map";
|
|
end if;
|
|
|
|
return Previous (Position);
|
|
end Previous;
|
|
|
|
----------------------
|
|
-- Pseudo_Reference --
|
|
----------------------
|
|
|
|
function Pseudo_Reference
|
|
(Container : aliased Map'Class) return Reference_Control_Type
|
|
is
|
|
TC : constant Tamper_Counts_Access :=
|
|
Container.Tree.TC'Unrestricted_Access;
|
|
begin
|
|
return R : constant Reference_Control_Type := (Controlled with TC) do
|
|
Lock (TC.all);
|
|
end return;
|
|
end Pseudo_Reference;
|
|
|
|
-------------------
|
|
-- Query_Element --
|
|
-------------------
|
|
|
|
procedure Query_Element
|
|
(Position : Cursor;
|
|
Process : not null access procedure (Key : Key_Type;
|
|
Element : Element_Type))
|
|
is
|
|
begin
|
|
if Checks and then Position.Node = null then
|
|
raise Constraint_Error with
|
|
"Position cursor of Query_Element equals No_Element";
|
|
end if;
|
|
|
|
if Checks and then
|
|
(Position.Node.Key = null or else Position.Node.Element = null)
|
|
then
|
|
raise Program_Error with
|
|
"Position cursor of Query_Element is bad";
|
|
end if;
|
|
|
|
pragma Assert (Vet (Position.Container.Tree, Position.Node),
|
|
"Position cursor of Query_Element is bad");
|
|
|
|
declare
|
|
T : Tree_Type renames Position.Container.Tree;
|
|
Lock : With_Lock (T.TC'Unrestricted_Access);
|
|
K : Key_Type renames Position.Node.Key.all;
|
|
E : Element_Type renames Position.Node.Element.all;
|
|
begin
|
|
Process (K, E);
|
|
end;
|
|
end Query_Element;
|
|
|
|
----------
|
|
-- Read --
|
|
----------
|
|
|
|
procedure Read
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Container : out Map)
|
|
is
|
|
function Read_Node
|
|
(Stream : not null access Root_Stream_Type'Class) return Node_Access;
|
|
pragma Inline (Read_Node);
|
|
|
|
procedure Read is
|
|
new Tree_Operations.Generic_Read (Clear, Read_Node);
|
|
|
|
---------------
|
|
-- Read_Node --
|
|
---------------
|
|
|
|
function Read_Node
|
|
(Stream : not null access Root_Stream_Type'Class) return Node_Access
|
|
is
|
|
Node : Node_Access := new Node_Type;
|
|
begin
|
|
Node.Key := new Key_Type'(Key_Type'Input (Stream));
|
|
Node.Element := new Element_Type'(Element_Type'Input (Stream));
|
|
return Node;
|
|
exception
|
|
when others =>
|
|
Free (Node); -- Note that Free deallocates key and elem too
|
|
raise;
|
|
end Read_Node;
|
|
|
|
-- Start of processing for Read
|
|
|
|
begin
|
|
Read (Stream, Container.Tree);
|
|
end Read;
|
|
|
|
procedure Read
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Item : out Cursor)
|
|
is
|
|
begin
|
|
raise Program_Error with "attempt to stream map cursor";
|
|
end Read;
|
|
|
|
procedure Read
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Item : out Reference_Type)
|
|
is
|
|
begin
|
|
raise Program_Error with "attempt to stream reference";
|
|
end Read;
|
|
|
|
procedure Read
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Item : out Constant_Reference_Type)
|
|
is
|
|
begin
|
|
raise Program_Error with "attempt to stream reference";
|
|
end Read;
|
|
|
|
---------------
|
|
-- Reference --
|
|
---------------
|
|
|
|
function Reference
|
|
(Container : aliased in out Map;
|
|
Position : Cursor) return Reference_Type
|
|
is
|
|
begin
|
|
if Checks and then Position.Container = null then
|
|
raise Constraint_Error with
|
|
"Position cursor has no element";
|
|
end if;
|
|
|
|
if Checks and then Position.Container /= Container'Unrestricted_Access
|
|
then
|
|
raise Program_Error with
|
|
"Position cursor designates wrong map";
|
|
end if;
|
|
|
|
if Checks and then Position.Node.Element = null then
|
|
raise Program_Error with "Node has no element";
|
|
end if;
|
|
|
|
pragma Assert (Vet (Container.Tree, Position.Node),
|
|
"Position cursor in function Reference is bad");
|
|
|
|
declare
|
|
TC : constant Tamper_Counts_Access :=
|
|
Container.Tree.TC'Unrestricted_Access;
|
|
begin
|
|
return R : constant Reference_Type :=
|
|
(Element => Position.Node.Element.all'Access,
|
|
Control => (Controlled with TC))
|
|
do
|
|
Lock (TC.all);
|
|
end return;
|
|
end;
|
|
end Reference;
|
|
|
|
function Reference
|
|
(Container : aliased in out Map;
|
|
Key : Key_Type) return Reference_Type
|
|
is
|
|
Node : constant Node_Access := Key_Ops.Find (Container.Tree, Key);
|
|
|
|
begin
|
|
if Checks and then Node = null then
|
|
raise Constraint_Error with "key not in map";
|
|
end if;
|
|
|
|
if Checks and then Node.Element = null then
|
|
raise Program_Error with "Node has no element";
|
|
end if;
|
|
|
|
declare
|
|
TC : constant Tamper_Counts_Access :=
|
|
Container.Tree.TC'Unrestricted_Access;
|
|
begin
|
|
return R : constant Reference_Type :=
|
|
(Element => Node.Element.all'Access,
|
|
Control => (Controlled with TC))
|
|
do
|
|
Lock (TC.all);
|
|
end return;
|
|
end;
|
|
end Reference;
|
|
|
|
-------------
|
|
-- Replace --
|
|
-------------
|
|
|
|
procedure Replace
|
|
(Container : in out Map;
|
|
Key : Key_Type;
|
|
New_Item : Element_Type)
|
|
is
|
|
Node : constant Node_Access := Key_Ops.Find (Container.Tree, Key);
|
|
|
|
K : Key_Access;
|
|
E : Element_Access;
|
|
|
|
begin
|
|
if Checks and then Node = null then
|
|
raise Constraint_Error with "key not in map";
|
|
end if;
|
|
|
|
TE_Check (Container.Tree.TC);
|
|
|
|
K := Node.Key;
|
|
E := Node.Element;
|
|
|
|
Node.Key := new Key_Type'(Key);
|
|
|
|
declare
|
|
-- The element allocator may need an accessibility check in the case
|
|
-- the actual type is class-wide or has access discriminants (see
|
|
-- RM 4.8(10.1) and AI12-0035).
|
|
|
|
pragma Unsuppress (Accessibility_Check);
|
|
|
|
begin
|
|
Node.Element := new Element_Type'(New_Item);
|
|
|
|
exception
|
|
when others =>
|
|
Free_Key (K);
|
|
raise;
|
|
end;
|
|
|
|
Free_Key (K);
|
|
Free_Element (E);
|
|
end Replace;
|
|
|
|
---------------------
|
|
-- Replace_Element --
|
|
---------------------
|
|
|
|
procedure Replace_Element
|
|
(Container : in out Map;
|
|
Position : Cursor;
|
|
New_Item : Element_Type)
|
|
is
|
|
begin
|
|
if Checks and then Position.Node = null then
|
|
raise Constraint_Error with
|
|
"Position cursor of Replace_Element equals No_Element";
|
|
end if;
|
|
|
|
if Checks and then
|
|
(Position.Node.Key = null or else Position.Node.Element = null)
|
|
then
|
|
raise Program_Error with
|
|
"Position cursor of Replace_Element is bad";
|
|
end if;
|
|
|
|
if Checks and then Position.Container /= Container'Unrestricted_Access
|
|
then
|
|
raise Program_Error with
|
|
"Position cursor of Replace_Element designates wrong map";
|
|
end if;
|
|
|
|
TE_Check (Container.Tree.TC);
|
|
|
|
pragma Assert (Vet (Container.Tree, Position.Node),
|
|
"Position cursor of Replace_Element is bad");
|
|
|
|
declare
|
|
X : Element_Access := Position.Node.Element;
|
|
|
|
-- The element allocator may need an accessibility check in the case
|
|
-- the actual type is class-wide or has access discriminants (see
|
|
-- RM 4.8(10.1) and AI12-0035).
|
|
|
|
pragma Unsuppress (Accessibility_Check);
|
|
|
|
begin
|
|
Position.Node.Element := new Element_Type'(New_Item);
|
|
Free_Element (X);
|
|
end;
|
|
end Replace_Element;
|
|
|
|
---------------------
|
|
-- Reverse_Iterate --
|
|
---------------------
|
|
|
|
procedure Reverse_Iterate
|
|
(Container : Map;
|
|
Process : not null access procedure (Position : Cursor))
|
|
is
|
|
procedure Process_Node (Node : Node_Access);
|
|
pragma Inline (Process_Node);
|
|
|
|
procedure Local_Reverse_Iterate is
|
|
new Tree_Operations.Generic_Reverse_Iteration (Process_Node);
|
|
|
|
------------------
|
|
-- Process_Node --
|
|
------------------
|
|
|
|
procedure Process_Node (Node : Node_Access) is
|
|
begin
|
|
Process (Cursor'(Container'Unrestricted_Access, Node));
|
|
end Process_Node;
|
|
|
|
Busy : With_Busy (Container.Tree.TC'Unrestricted_Access);
|
|
|
|
-- Start of processing for Reverse_Iterate
|
|
|
|
begin
|
|
Local_Reverse_Iterate (Container.Tree);
|
|
end Reverse_Iterate;
|
|
|
|
-----------
|
|
-- Right --
|
|
-----------
|
|
|
|
function Right (Node : Node_Access) return Node_Access is
|
|
begin
|
|
return Node.Right;
|
|
end Right;
|
|
|
|
---------------
|
|
-- Set_Color --
|
|
---------------
|
|
|
|
procedure Set_Color (Node : Node_Access; Color : Color_Type) is
|
|
begin
|
|
Node.Color := Color;
|
|
end Set_Color;
|
|
|
|
--------------
|
|
-- Set_Left --
|
|
--------------
|
|
|
|
procedure Set_Left (Node : Node_Access; Left : Node_Access) is
|
|
begin
|
|
Node.Left := Left;
|
|
end Set_Left;
|
|
|
|
----------------
|
|
-- Set_Parent --
|
|
----------------
|
|
|
|
procedure Set_Parent (Node : Node_Access; Parent : Node_Access) is
|
|
begin
|
|
Node.Parent := Parent;
|
|
end Set_Parent;
|
|
|
|
---------------
|
|
-- Set_Right --
|
|
---------------
|
|
|
|
procedure Set_Right (Node : Node_Access; Right : Node_Access) is
|
|
begin
|
|
Node.Right := Right;
|
|
end Set_Right;
|
|
|
|
--------------------
|
|
-- Update_Element --
|
|
--------------------
|
|
|
|
procedure Update_Element
|
|
(Container : in out Map;
|
|
Position : Cursor;
|
|
Process : not null access procedure (Key : Key_Type;
|
|
Element : in out Element_Type))
|
|
is
|
|
begin
|
|
if Checks and then Position.Node = null then
|
|
raise Constraint_Error with
|
|
"Position cursor of Update_Element equals No_Element";
|
|
end if;
|
|
|
|
if Checks and then
|
|
(Position.Node.Key = null or else Position.Node.Element = null)
|
|
then
|
|
raise Program_Error with
|
|
"Position cursor of Update_Element is bad";
|
|
end if;
|
|
|
|
if Checks and then Position.Container /= Container'Unrestricted_Access
|
|
then
|
|
raise Program_Error with
|
|
"Position cursor of Update_Element designates wrong map";
|
|
end if;
|
|
|
|
pragma Assert (Vet (Container.Tree, Position.Node),
|
|
"Position cursor of Update_Element is bad");
|
|
|
|
declare
|
|
T : Tree_Type renames Position.Container.Tree;
|
|
Lock : With_Lock (T.TC'Unrestricted_Access);
|
|
K : Key_Type renames Position.Node.Key.all;
|
|
E : Element_Type renames Position.Node.Element.all;
|
|
begin
|
|
Process (K, E);
|
|
end;
|
|
end Update_Element;
|
|
|
|
-----------
|
|
-- Write --
|
|
-----------
|
|
|
|
procedure Write
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Container : Map)
|
|
is
|
|
procedure Write_Node
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Node : Node_Access);
|
|
pragma Inline (Write_Node);
|
|
|
|
procedure Write is
|
|
new Tree_Operations.Generic_Write (Write_Node);
|
|
|
|
----------------
|
|
-- Write_Node --
|
|
----------------
|
|
|
|
procedure Write_Node
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Node : Node_Access)
|
|
is
|
|
begin
|
|
Key_Type'Output (Stream, Node.Key.all);
|
|
Element_Type'Output (Stream, Node.Element.all);
|
|
end Write_Node;
|
|
|
|
-- Start of processing for Write
|
|
|
|
begin
|
|
Write (Stream, Container.Tree);
|
|
end Write;
|
|
|
|
procedure Write
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Item : Cursor)
|
|
is
|
|
begin
|
|
raise Program_Error with "attempt to stream map cursor";
|
|
end Write;
|
|
|
|
procedure Write
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Item : Reference_Type)
|
|
is
|
|
begin
|
|
raise Program_Error with "attempt to stream reference";
|
|
end Write;
|
|
|
|
procedure Write
|
|
(Stream : not null access Root_Stream_Type'Class;
|
|
Item : Constant_Reference_Type)
|
|
is
|
|
begin
|
|
raise Program_Error with "attempt to stream reference";
|
|
end Write;
|
|
|
|
end Ada.Containers.Indefinite_Ordered_Maps;
|