| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT LIBRARY COMPONENTS -- |
| -- -- |
| -- A D A . C O N T A I N E R S . F O R M A L _ O R D E R E D _ S E T S -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2010-2021, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| ------------------------------------------------------------------------------ |
| |
| with Ada.Containers.Red_Black_Trees.Generic_Bounded_Operations; |
| pragma Elaborate_All |
| (Ada.Containers.Red_Black_Trees.Generic_Bounded_Operations); |
| |
| with Ada.Containers.Red_Black_Trees.Generic_Bounded_Keys; |
| pragma Elaborate_All (Ada.Containers.Red_Black_Trees.Generic_Bounded_Keys); |
| |
| with Ada.Containers.Red_Black_Trees.Generic_Bounded_Set_Operations; |
| pragma Elaborate_All |
| (Ada.Containers.Red_Black_Trees.Generic_Bounded_Set_Operations); |
| |
| with System; use type System.Address; |
| |
| package body Ada.Containers.Formal_Ordered_Sets with |
| SPARK_Mode => Off |
| is |
| |
| ------------------------------ |
| -- Access to Fields of Node -- |
| ------------------------------ |
| |
| -- These subprograms provide functional notation for access to fields |
| -- of a node, and procedural notation for modifiying these fields. |
| |
| function Color (Node : Node_Type) return Red_Black_Trees.Color_Type; |
| pragma Inline (Color); |
| |
| function Left_Son (Node : Node_Type) return Count_Type; |
| pragma Inline (Left_Son); |
| |
| function Parent (Node : Node_Type) return Count_Type; |
| pragma Inline (Parent); |
| |
| function Right_Son (Node : Node_Type) return Count_Type; |
| pragma Inline (Right_Son); |
| |
| procedure Set_Color |
| (Node : in out Node_Type; |
| Color : Red_Black_Trees.Color_Type); |
| pragma Inline (Set_Color); |
| |
| procedure Set_Left (Node : in out Node_Type; Left : Count_Type); |
| pragma Inline (Set_Left); |
| |
| procedure Set_Right (Node : in out Node_Type; Right : Count_Type); |
| pragma Inline (Set_Right); |
| |
| procedure Set_Parent (Node : in out Node_Type; Parent : Count_Type); |
| pragma Inline (Set_Parent); |
| |
| ----------------------- |
| -- Local Subprograms -- |
| ----------------------- |
| |
| -- Comments needed??? |
| |
| procedure Assign |
| (Target : in out Tree_Types.Tree_Type; |
| Source : Tree_Types.Tree_Type); |
| |
| generic |
| with procedure Set_Element (Node : in out Node_Type); |
| procedure Generic_Allocate |
| (Tree : in out Tree_Types.Tree_Type'Class; |
| Node : out Count_Type); |
| |
| procedure Free (Tree : in out Set; X : Count_Type); |
| |
| procedure Insert_Sans_Hint |
| (Container : in out Tree_Types.Tree_Type; |
| New_Item : Element_Type; |
| Node : out Count_Type; |
| Inserted : out Boolean); |
| |
| procedure Insert_With_Hint |
| (Dst_Set : in out Tree_Types.Tree_Type; |
| Dst_Hint : Count_Type; |
| Src_Node : Node_Type; |
| Dst_Node : out Count_Type); |
| |
| function Is_Greater_Element_Node |
| (Left : Element_Type; |
| Right : Node_Type) return Boolean; |
| pragma Inline (Is_Greater_Element_Node); |
| |
| function Is_Less_Element_Node |
| (Left : Element_Type; |
| Right : Node_Type) return Boolean; |
| pragma Inline (Is_Less_Element_Node); |
| |
| function Is_Less_Node_Node (L, R : Node_Type) return Boolean; |
| pragma Inline (Is_Less_Node_Node); |
| |
| procedure Replace_Element |
| (Tree : in out Set; |
| Node : Count_Type; |
| Item : Element_Type); |
| |
| -------------------------- |
| -- Local Instantiations -- |
| -------------------------- |
| |
| package Tree_Operations is |
| new Red_Black_Trees.Generic_Bounded_Operations |
| (Tree_Types, |
| Left => Left_Son, |
| Right => Right_Son); |
| |
| use Tree_Operations; |
| |
| package Element_Keys is |
| new Red_Black_Trees.Generic_Bounded_Keys |
| (Tree_Operations => Tree_Operations, |
| Key_Type => Element_Type, |
| Is_Less_Key_Node => Is_Less_Element_Node, |
| Is_Greater_Key_Node => Is_Greater_Element_Node); |
| |
| package Set_Ops is |
| new Red_Black_Trees.Generic_Bounded_Set_Operations |
| (Tree_Operations => Tree_Operations, |
| Set_Type => Tree_Types.Tree_Type, |
| Assign => Assign, |
| Insert_With_Hint => Insert_With_Hint, |
| Is_Less => Is_Less_Node_Node); |
| |
| --------- |
| -- "=" -- |
| --------- |
| |
| function "=" (Left, Right : Set) return Boolean is |
| Lst : Count_Type; |
| Node : Count_Type; |
| ENode : Count_Type; |
| |
| begin |
| if Length (Left) /= Length (Right) then |
| return False; |
| end if; |
| |
| if Is_Empty (Left) then |
| return True; |
| end if; |
| |
| Lst := Next (Left.Content, Last (Left).Node); |
| |
| Node := First (Left).Node; |
| while Node /= Lst loop |
| ENode := Find (Right, Left.Content.Nodes (Node).Element).Node; |
| if ENode = 0 |
| or else Left.Content.Nodes (Node).Element /= |
| Right.Content.Nodes (ENode).Element |
| then |
| return False; |
| end if; |
| |
| Node := Next (Left.Content, Node); |
| end loop; |
| |
| return True; |
| end "="; |
| |
| ------------ |
| -- Assign -- |
| ------------ |
| |
| procedure Assign |
| (Target : in out Tree_Types.Tree_Type; |
| Source : Tree_Types.Tree_Type) |
| is |
| procedure Append_Element (Source_Node : Count_Type); |
| |
| procedure Append_Elements is |
| new Tree_Operations.Generic_Iteration (Append_Element); |
| |
| -------------------- |
| -- Append_Element -- |
| -------------------- |
| |
| procedure Append_Element (Source_Node : Count_Type) is |
| SN : Node_Type renames Source.Nodes (Source_Node); |
| |
| procedure Set_Element (Node : in out Node_Type); |
| pragma Inline (Set_Element); |
| |
| function New_Node return Count_Type; |
| pragma Inline (New_Node); |
| |
| procedure Insert_Post is |
| new Element_Keys.Generic_Insert_Post (New_Node); |
| |
| procedure Unconditional_Insert_Sans_Hint is |
| new Element_Keys.Generic_Unconditional_Insert (Insert_Post); |
| |
| procedure Unconditional_Insert_Avec_Hint is |
| new Element_Keys.Generic_Unconditional_Insert_With_Hint |
| (Insert_Post, |
| Unconditional_Insert_Sans_Hint); |
| |
| procedure Allocate is new Generic_Allocate (Set_Element); |
| |
| -------------- |
| -- New_Node -- |
| -------------- |
| |
| function New_Node return Count_Type is |
| Result : Count_Type; |
| begin |
| Allocate (Target, Result); |
| return Result; |
| end New_Node; |
| |
| ----------------- |
| -- Set_Element -- |
| ----------------- |
| |
| procedure Set_Element (Node : in out Node_Type) is |
| begin |
| Node.Element := SN.Element; |
| end Set_Element; |
| |
| -- Local variables |
| |
| Target_Node : Count_Type; |
| |
| -- Start of processing for Append_Element |
| |
| begin |
| Unconditional_Insert_Avec_Hint |
| (Tree => Target, |
| Hint => 0, |
| Key => SN.Element, |
| Node => Target_Node); |
| end Append_Element; |
| |
| -- Start of processing for Assign |
| |
| begin |
| if Target'Address = Source'Address then |
| return; |
| end if; |
| |
| if Target.Capacity < Source.Length then |
| raise Constraint_Error |
| with "Target capacity is less than Source length"; |
| end if; |
| |
| Tree_Operations.Clear_Tree (Target); |
| Append_Elements (Source); |
| end Assign; |
| |
| procedure Assign (Target : in out Set; Source : Set) is |
| begin |
| Assign (Target.Content, Source.Content); |
| end Assign; |
| |
| ------------- |
| -- Ceiling -- |
| ------------- |
| |
| function Ceiling (Container : Set; Item : Element_Type) return Cursor is |
| Node : constant Count_Type := |
| Element_Keys.Ceiling (Container.Content, Item); |
| |
| begin |
| if Node = 0 then |
| return No_Element; |
| end if; |
| |
| return (Node => Node); |
| end Ceiling; |
| |
| ----------- |
| -- Clear -- |
| ----------- |
| |
| procedure Clear (Container : in out Set) is |
| begin |
| Tree_Operations.Clear_Tree (Container.Content); |
| end Clear; |
| |
| ----------- |
| -- Color -- |
| ----------- |
| |
| function Color (Node : Node_Type) return Red_Black_Trees.Color_Type is |
| begin |
| return Node.Color; |
| end Color; |
| |
| ------------------------ |
| -- Constant_Reference -- |
| ------------------------ |
| |
| function Constant_Reference |
| (Container : aliased Set; |
| Position : Cursor) return not null access constant Element_Type |
| is |
| begin |
| if not Has_Element (Container, Position) then |
| raise Constraint_Error with "Position cursor has no element"; |
| end if; |
| |
| pragma Assert (Vet (Container.Content, Position.Node), |
| "bad cursor in Element"); |
| |
| return Container.Content.Nodes (Position.Node).Element'Access; |
| end Constant_Reference; |
| |
| -------------- |
| -- Contains -- |
| -------------- |
| |
| function Contains |
| (Container : Set; |
| Item : Element_Type) return Boolean |
| is |
| begin |
| return Find (Container, Item) /= No_Element; |
| end Contains; |
| |
| ---------- |
| -- Copy -- |
| ---------- |
| |
| function Copy (Source : Set; Capacity : Count_Type := 0) return Set is |
| Node : Count_Type; |
| N : Count_Type; |
| Target : Set (Count_Type'Max (Source.Capacity, Capacity)); |
| |
| begin |
| if 0 < Capacity and then Capacity < Source.Capacity then |
| raise Capacity_Error; |
| end if; |
| |
| if Length (Source) > 0 then |
| Target.Content.Length := Source.Content.Length; |
| Target.Content.Root := Source.Content.Root; |
| Target.Content.First := Source.Content.First; |
| Target.Content.Last := Source.Content.Last; |
| Target.Content.Free := Source.Content.Free; |
| |
| Node := 1; |
| while Node <= Source.Capacity loop |
| Target.Content.Nodes (Node).Element := |
| Source.Content.Nodes (Node).Element; |
| Target.Content.Nodes (Node).Parent := |
| Source.Content.Nodes (Node).Parent; |
| Target.Content.Nodes (Node).Left := |
| Source.Content.Nodes (Node).Left; |
| Target.Content.Nodes (Node).Right := |
| Source.Content.Nodes (Node).Right; |
| Target.Content.Nodes (Node).Color := |
| Source.Content.Nodes (Node).Color; |
| Target.Content.Nodes (Node).Has_Element := |
| Source.Content.Nodes (Node).Has_Element; |
| Node := Node + 1; |
| end loop; |
| |
| while Node <= Target.Capacity loop |
| N := Node; |
| Free (Tree => Target, X => N); |
| Node := Node + 1; |
| end loop; |
| end if; |
| |
| return Target; |
| end Copy; |
| |
| ------------ |
| -- Delete -- |
| ------------ |
| |
| procedure Delete (Container : in out Set; Position : in out Cursor) is |
| begin |
| if not Has_Element (Container, Position) then |
| raise Constraint_Error with "Position cursor has no element"; |
| end if; |
| |
| pragma Assert (Vet (Container.Content, Position.Node), |
| "bad cursor in Delete"); |
| |
| Tree_Operations.Delete_Node_Sans_Free (Container.Content, |
| Position.Node); |
| Free (Container, Position.Node); |
| Position := No_Element; |
| end Delete; |
| |
| procedure Delete (Container : in out Set; Item : Element_Type) is |
| X : constant Count_Type := Element_Keys.Find (Container.Content, Item); |
| |
| begin |
| if X = 0 then |
| raise Constraint_Error with "attempt to delete element not in set"; |
| end if; |
| |
| Tree_Operations.Delete_Node_Sans_Free (Container.Content, X); |
| Free (Container, X); |
| end Delete; |
| |
| ------------------ |
| -- Delete_First -- |
| ------------------ |
| |
| procedure Delete_First (Container : in out Set) is |
| X : constant Count_Type := Container.Content.First; |
| begin |
| if X /= 0 then |
| Tree_Operations.Delete_Node_Sans_Free (Container.Content, X); |
| Free (Container, X); |
| end if; |
| end Delete_First; |
| |
| ----------------- |
| -- Delete_Last -- |
| ----------------- |
| |
| procedure Delete_Last (Container : in out Set) is |
| X : constant Count_Type := Container.Content.Last; |
| begin |
| if X /= 0 then |
| Tree_Operations.Delete_Node_Sans_Free (Container.Content, X); |
| Free (Container, X); |
| end if; |
| end Delete_Last; |
| |
| ---------------- |
| -- Difference -- |
| ---------------- |
| |
| procedure Difference (Target : in out Set; Source : Set) is |
| begin |
| Set_Ops.Set_Difference (Target.Content, Source.Content); |
| end Difference; |
| |
| function Difference (Left, Right : Set) return Set is |
| begin |
| if Left'Address = Right'Address then |
| return Empty_Set; |
| end if; |
| |
| if Length (Left) = 0 then |
| return Empty_Set; |
| end if; |
| |
| if Length (Right) = 0 then |
| return Copy (Left); |
| end if; |
| |
| return S : Set (Length (Left)) do |
| Assign |
| (S.Content, Set_Ops.Set_Difference (Left.Content, Right.Content)); |
| end return; |
| end Difference; |
| |
| ------------- |
| -- Element -- |
| ------------- |
| |
| function Element (Container : Set; Position : Cursor) return Element_Type is |
| begin |
| if not Has_Element (Container, Position) then |
| raise Constraint_Error with "Position cursor has no element"; |
| end if; |
| |
| pragma Assert (Vet (Container.Content, Position.Node), |
| "bad cursor in Element"); |
| |
| return Container.Content.Nodes (Position.Node).Element; |
| end Element; |
| |
| ------------------------- |
| -- Equivalent_Elements -- |
| ------------------------- |
| |
| function Equivalent_Elements (Left, Right : Element_Type) return Boolean is |
| begin |
| if Left < Right |
| or else Right < Left |
| then |
| return False; |
| else |
| return True; |
| end if; |
| end Equivalent_Elements; |
| |
| --------------------- |
| -- Equivalent_Sets -- |
| --------------------- |
| |
| function Equivalent_Sets (Left, Right : Set) return Boolean is |
| function Is_Equivalent_Node_Node |
| (L, R : Node_Type) return Boolean; |
| pragma Inline (Is_Equivalent_Node_Node); |
| |
| function Is_Equivalent is |
| new Tree_Operations.Generic_Equal (Is_Equivalent_Node_Node); |
| |
| ----------------------------- |
| -- Is_Equivalent_Node_Node -- |
| ----------------------------- |
| |
| function Is_Equivalent_Node_Node (L, R : Node_Type) return Boolean is |
| begin |
| if L.Element < R.Element then |
| return False; |
| elsif R.Element < L.Element then |
| return False; |
| else |
| return True; |
| end if; |
| end Is_Equivalent_Node_Node; |
| |
| -- Start of processing for Equivalent_Sets |
| |
| begin |
| return Is_Equivalent (Left.Content, Right.Content); |
| end Equivalent_Sets; |
| |
| ------------- |
| -- Exclude -- |
| ------------- |
| |
| procedure Exclude (Container : in out Set; Item : Element_Type) is |
| X : constant Count_Type := Element_Keys.Find (Container.Content, Item); |
| begin |
| if X /= 0 then |
| Tree_Operations.Delete_Node_Sans_Free (Container.Content, X); |
| Free (Container, X); |
| end if; |
| end Exclude; |
| |
| ---------- |
| -- Find -- |
| ---------- |
| |
| function Find (Container : Set; Item : Element_Type) return Cursor is |
| Node : constant Count_Type := |
| Element_Keys.Find (Container.Content, Item); |
| |
| begin |
| if Node = 0 then |
| return No_Element; |
| end if; |
| |
| return (Node => Node); |
| end Find; |
| |
| ----------- |
| -- First -- |
| ----------- |
| |
| function First (Container : Set) return Cursor is |
| begin |
| if Length (Container) = 0 then |
| return No_Element; |
| end if; |
| |
| return (Node => Container.Content.First); |
| end First; |
| |
| ------------------- |
| -- First_Element -- |
| ------------------- |
| |
| function First_Element (Container : Set) return Element_Type is |
| Fst : constant Count_Type := First (Container).Node; |
| begin |
| if Fst = 0 then |
| raise Constraint_Error with "set is empty"; |
| end if; |
| |
| declare |
| N : Tree_Types.Nodes_Type renames Container.Content.Nodes; |
| begin |
| return N (Fst).Element; |
| end; |
| end First_Element; |
| |
| ----------- |
| -- Floor -- |
| ----------- |
| |
| function Floor (Container : Set; Item : Element_Type) return Cursor is |
| begin |
| declare |
| Node : constant Count_Type := |
| Element_Keys.Floor (Container.Content, Item); |
| |
| begin |
| if Node = 0 then |
| return No_Element; |
| end if; |
| |
| return (Node => Node); |
| end; |
| end Floor; |
| |
| ------------------ |
| -- Formal_Model -- |
| ------------------ |
| |
| package body Formal_Model is |
| |
| ------------------------- |
| -- E_Bigger_Than_Range -- |
| ------------------------- |
| |
| function E_Bigger_Than_Range |
| (Container : E.Sequence; |
| Fst : Positive_Count_Type; |
| Lst : Count_Type; |
| Item : Element_Type) return Boolean |
| is |
| begin |
| for I in Fst .. Lst loop |
| if not (E.Get (Container, I) < Item) then |
| return False; |
| end if; |
| end loop; |
| |
| return True; |
| end E_Bigger_Than_Range; |
| |
| ------------------------- |
| -- E_Elements_Included -- |
| ------------------------- |
| |
| function E_Elements_Included |
| (Left : E.Sequence; |
| Right : E.Sequence) return Boolean |
| is |
| begin |
| for I in 1 .. E.Length (Left) loop |
| if not E.Contains (Right, 1, E.Length (Right), E.Get (Left, I)) |
| then |
| return False; |
| end if; |
| end loop; |
| |
| return True; |
| end E_Elements_Included; |
| |
| function E_Elements_Included |
| (Left : E.Sequence; |
| Model : M.Set; |
| Right : E.Sequence) return Boolean |
| is |
| begin |
| for I in 1 .. E.Length (Left) loop |
| declare |
| Item : constant Element_Type := E.Get (Left, I); |
| begin |
| if M.Contains (Model, Item) then |
| if not E.Contains (Right, 1, E.Length (Right), Item) then |
| return False; |
| end if; |
| end if; |
| end; |
| end loop; |
| |
| return True; |
| end E_Elements_Included; |
| |
| function E_Elements_Included |
| (Container : E.Sequence; |
| Model : M.Set; |
| Left : E.Sequence; |
| Right : E.Sequence) return Boolean |
| is |
| begin |
| for I in 1 .. E.Length (Container) loop |
| declare |
| Item : constant Element_Type := E.Get (Container, I); |
| begin |
| if M.Contains (Model, Item) then |
| if not E.Contains (Left, 1, E.Length (Left), Item) then |
| return False; |
| end if; |
| else |
| if not E.Contains (Right, 1, E.Length (Right), Item) then |
| return False; |
| end if; |
| end if; |
| end; |
| end loop; |
| |
| return True; |
| end E_Elements_Included; |
| |
| --------------- |
| -- E_Is_Find -- |
| --------------- |
| |
| function E_Is_Find |
| (Container : E.Sequence; |
| Item : Element_Type; |
| Position : Count_Type) return Boolean |
| is |
| begin |
| for I in 1 .. Position - 1 loop |
| if Item < E.Get (Container, I) then |
| return False; |
| end if; |
| end loop; |
| |
| if Position < E.Length (Container) then |
| for I in Position + 1 .. E.Length (Container) loop |
| if E.Get (Container, I) < Item then |
| return False; |
| end if; |
| end loop; |
| end if; |
| |
| return True; |
| end E_Is_Find; |
| |
| -------------------------- |
| -- E_Smaller_Than_Range -- |
| -------------------------- |
| |
| function E_Smaller_Than_Range |
| (Container : E.Sequence; |
| Fst : Positive_Count_Type; |
| Lst : Count_Type; |
| Item : Element_Type) return Boolean |
| is |
| begin |
| for I in Fst .. Lst loop |
| if not (Item < E.Get (Container, I)) then |
| return False; |
| end if; |
| end loop; |
| |
| return True; |
| end E_Smaller_Than_Range; |
| |
| ---------- |
| -- Find -- |
| ---------- |
| |
| function Find |
| (Container : E.Sequence; |
| Item : Element_Type) return Count_Type |
| is |
| begin |
| for I in 1 .. E.Length (Container) loop |
| if Equivalent_Elements (Item, E.Get (Container, I)) then |
| return I; |
| end if; |
| end loop; |
| |
| return 0; |
| end Find; |
| |
| -------------- |
| -- Elements -- |
| -------------- |
| |
| function Elements (Container : Set) return E.Sequence is |
| Position : Count_Type := Container.Content.First; |
| R : E.Sequence; |
| |
| begin |
| -- Can't use First, Next or Element here, since they depend on models |
| -- for their postconditions. |
| |
| while Position /= 0 loop |
| R := E.Add (R, Container.Content.Nodes (Position).Element); |
| Position := Tree_Operations.Next (Container.Content, Position); |
| end loop; |
| |
| return R; |
| end Elements; |
| |
| ---------------------------- |
| -- Lift_Abstraction_Level -- |
| ---------------------------- |
| |
| procedure Lift_Abstraction_Level (Container : Set) is null; |
| |
| ----------------------- |
| -- Mapping_Preserved -- |
| ----------------------- |
| |
| function Mapping_Preserved |
| (E_Left : E.Sequence; |
| E_Right : E.Sequence; |
| P_Left : P.Map; |
| P_Right : P.Map) return Boolean |
| is |
| begin |
| for C of P_Left loop |
| if not P.Has_Key (P_Right, C) |
| or else P.Get (P_Left, C) > E.Length (E_Left) |
| or else P.Get (P_Right, C) > E.Length (E_Right) |
| or else E.Get (E_Left, P.Get (P_Left, C)) /= |
| E.Get (E_Right, P.Get (P_Right, C)) |
| then |
| return False; |
| end if; |
| end loop; |
| |
| return True; |
| end Mapping_Preserved; |
| |
| ------------------------------ |
| -- Mapping_Preserved_Except -- |
| ------------------------------ |
| |
| function Mapping_Preserved_Except |
| (E_Left : E.Sequence; |
| E_Right : E.Sequence; |
| P_Left : P.Map; |
| P_Right : P.Map; |
| Position : Cursor) return Boolean |
| is |
| begin |
| for C of P_Left loop |
| if C /= Position |
| and (not P.Has_Key (P_Right, C) |
| or else P.Get (P_Left, C) > E.Length (E_Left) |
| or else P.Get (P_Right, C) > E.Length (E_Right) |
| or else E.Get (E_Left, P.Get (P_Left, C)) /= |
| E.Get (E_Right, P.Get (P_Right, C))) |
| then |
| return False; |
| end if; |
| end loop; |
| |
| return True; |
| end Mapping_Preserved_Except; |
| |
| ------------------------- |
| -- P_Positions_Shifted -- |
| ------------------------- |
| |
| function P_Positions_Shifted |
| (Small : P.Map; |
| Big : P.Map; |
| Cut : Positive_Count_Type; |
| Count : Count_Type := 1) return Boolean |
| is |
| begin |
| for Cu of Small loop |
| if not P.Has_Key (Big, Cu) then |
| return False; |
| end if; |
| end loop; |
| |
| for Cu of Big loop |
| declare |
| Pos : constant Positive_Count_Type := P.Get (Big, Cu); |
| |
| begin |
| if Pos < Cut then |
| if not P.Has_Key (Small, Cu) |
| or else Pos /= P.Get (Small, Cu) |
| then |
| return False; |
| end if; |
| |
| elsif Pos >= Cut + Count then |
| if not P.Has_Key (Small, Cu) |
| or else Pos /= P.Get (Small, Cu) + Count |
| then |
| return False; |
| end if; |
| |
| else |
| if P.Has_Key (Small, Cu) then |
| return False; |
| end if; |
| end if; |
| end; |
| end loop; |
| |
| return True; |
| end P_Positions_Shifted; |
| |
| ----------- |
| -- Model -- |
| ----------- |
| |
| function Model (Container : Set) return M.Set is |
| Position : Count_Type := Container.Content.First; |
| R : M.Set; |
| |
| begin |
| -- Can't use First, Next or Element here, since they depend on models |
| -- for their postconditions. |
| |
| while Position /= 0 loop |
| R := |
| M.Add |
| (Container => R, |
| Item => Container.Content.Nodes (Position).Element); |
| |
| Position := Tree_Operations.Next (Container.Content, Position); |
| end loop; |
| |
| return R; |
| end Model; |
| |
| --------------- |
| -- Positions -- |
| --------------- |
| |
| function Positions (Container : Set) return P.Map is |
| I : Count_Type := 1; |
| Position : Count_Type := Container.Content.First; |
| R : P.Map; |
| |
| begin |
| -- Can't use First, Next or Element here, since they depend on models |
| -- for their postconditions. |
| |
| while Position /= 0 loop |
| R := P.Add (R, (Node => Position), I); |
| pragma Assert (P.Length (R) = I); |
| Position := Tree_Operations.Next (Container.Content, Position); |
| I := I + 1; |
| end loop; |
| |
| return R; |
| end Positions; |
| |
| end Formal_Model; |
| |
| ---------- |
| -- Free -- |
| ---------- |
| |
| procedure Free (Tree : in out Set; X : Count_Type) is |
| begin |
| Tree.Content.Nodes (X).Has_Element := False; |
| Tree_Operations.Free (Tree.Content, X); |
| end Free; |
| |
| ---------------------- |
| -- Generic_Allocate -- |
| ---------------------- |
| |
| procedure Generic_Allocate |
| (Tree : in out Tree_Types.Tree_Type'Class; |
| Node : out Count_Type) |
| is |
| procedure Allocate is |
| new Tree_Operations.Generic_Allocate (Set_Element); |
| begin |
| Allocate (Tree, Node); |
| Tree.Nodes (Node).Has_Element := True; |
| end Generic_Allocate; |
| |
| ------------------ |
| -- Generic_Keys -- |
| ------------------ |
| |
| package body Generic_Keys with SPARK_Mode => Off is |
| |
| ----------------------- |
| -- Local Subprograms -- |
| ----------------------- |
| |
| function Is_Greater_Key_Node |
| (Left : Key_Type; |
| Right : Node_Type) return Boolean; |
| pragma Inline (Is_Greater_Key_Node); |
| |
| function Is_Less_Key_Node |
| (Left : Key_Type; |
| Right : Node_Type) return Boolean; |
| pragma Inline (Is_Less_Key_Node); |
| |
| -------------------------- |
| -- Local Instantiations -- |
| -------------------------- |
| |
| package Key_Keys is |
| new Red_Black_Trees.Generic_Bounded_Keys |
| (Tree_Operations => Tree_Operations, |
| Key_Type => Key_Type, |
| Is_Less_Key_Node => Is_Less_Key_Node, |
| Is_Greater_Key_Node => Is_Greater_Key_Node); |
| |
| ------------- |
| -- Ceiling -- |
| ------------- |
| |
| function Ceiling (Container : Set; Key : Key_Type) return Cursor is |
| Node : constant Count_Type := |
| Key_Keys.Ceiling (Container.Content, Key); |
| |
| begin |
| if Node = 0 then |
| return No_Element; |
| end if; |
| |
| return (Node => Node); |
| end Ceiling; |
| |
| -------------- |
| -- Contains -- |
| -------------- |
| |
| function Contains (Container : Set; Key : Key_Type) return Boolean is |
| begin |
| return Find (Container, Key) /= No_Element; |
| end Contains; |
| |
| ------------ |
| -- Delete -- |
| ------------ |
| |
| procedure Delete (Container : in out Set; Key : Key_Type) is |
| X : constant Count_Type := Key_Keys.Find (Container.Content, Key); |
| |
| begin |
| if X = 0 then |
| raise Constraint_Error with "attempt to delete key not in set"; |
| end if; |
| |
| Delete_Node_Sans_Free (Container.Content, X); |
| Free (Container, X); |
| end Delete; |
| |
| ------------- |
| -- Element -- |
| ------------- |
| |
| function Element (Container : Set; Key : Key_Type) return Element_Type is |
| Node : constant Count_Type := Key_Keys.Find (Container.Content, Key); |
| |
| begin |
| if Node = 0 then |
| raise Constraint_Error with "key not in set"; |
| end if; |
| |
| declare |
| N : Tree_Types.Nodes_Type renames Container.Content.Nodes; |
| begin |
| return N (Node).Element; |
| end; |
| end Element; |
| |
| --------------------- |
| -- Equivalent_Keys -- |
| --------------------- |
| |
| function Equivalent_Keys (Left, Right : Key_Type) return Boolean is |
| begin |
| if Left < Right |
| or else Right < Left |
| then |
| return False; |
| else |
| return True; |
| end if; |
| end Equivalent_Keys; |
| |
| ------------- |
| -- Exclude -- |
| ------------- |
| |
| procedure Exclude (Container : in out Set; Key : Key_Type) is |
| X : constant Count_Type := Key_Keys.Find (Container.Content, Key); |
| begin |
| if X /= 0 then |
| Delete_Node_Sans_Free (Container.Content, X); |
| Free (Container, X); |
| end if; |
| end Exclude; |
| |
| ---------- |
| -- Find -- |
| ---------- |
| |
| function Find (Container : Set; Key : Key_Type) return Cursor is |
| Node : constant Count_Type := Key_Keys.Find (Container.Content, Key); |
| begin |
| return (if Node = 0 then No_Element else (Node => Node)); |
| end Find; |
| |
| ----------- |
| -- Floor -- |
| ----------- |
| |
| function Floor (Container : Set; Key : Key_Type) return Cursor is |
| Node : constant Count_Type := Key_Keys.Floor (Container.Content, Key); |
| begin |
| return (if Node = 0 then No_Element else (Node => Node)); |
| end Floor; |
| |
| ------------------ |
| -- Formal_Model -- |
| ------------------ |
| |
| package body Formal_Model is |
| |
| ------------------------- |
| -- E_Bigger_Than_Range -- |
| ------------------------- |
| |
| function E_Bigger_Than_Range |
| (Container : E.Sequence; |
| Fst : Positive_Count_Type; |
| Lst : Count_Type; |
| Key : Key_Type) return Boolean |
| is |
| begin |
| for I in Fst .. Lst loop |
| if not (Generic_Keys.Key (E.Get (Container, I)) < Key) then |
| return False; |
| end if; |
| end loop; |
| return True; |
| end E_Bigger_Than_Range; |
| |
| --------------- |
| -- E_Is_Find -- |
| --------------- |
| |
| function E_Is_Find |
| (Container : E.Sequence; |
| Key : Key_Type; |
| Position : Count_Type) return Boolean |
| is |
| begin |
| for I in 1 .. Position - 1 loop |
| if Key < Generic_Keys.Key (E.Get (Container, I)) then |
| return False; |
| end if; |
| end loop; |
| |
| if Position < E.Length (Container) then |
| for I in Position + 1 .. E.Length (Container) loop |
| if Generic_Keys.Key (E.Get (Container, I)) < Key then |
| return False; |
| end if; |
| end loop; |
| end if; |
| return True; |
| end E_Is_Find; |
| |
| -------------------------- |
| -- E_Smaller_Than_Range -- |
| -------------------------- |
| |
| function E_Smaller_Than_Range |
| (Container : E.Sequence; |
| Fst : Positive_Count_Type; |
| Lst : Count_Type; |
| Key : Key_Type) return Boolean |
| is |
| begin |
| for I in Fst .. Lst loop |
| if not (Key < Generic_Keys.Key (E.Get (Container, I))) then |
| return False; |
| end if; |
| end loop; |
| return True; |
| end E_Smaller_Than_Range; |
| |
| ---------- |
| -- Find -- |
| ---------- |
| |
| function Find |
| (Container : E.Sequence; |
| Key : Key_Type) return Count_Type |
| is |
| begin |
| for I in 1 .. E.Length (Container) loop |
| if Equivalent_Keys |
| (Key, Generic_Keys.Key (E.Get (Container, I))) |
| then |
| return I; |
| end if; |
| end loop; |
| return 0; |
| end Find; |
| |
| ----------------------- |
| -- M_Included_Except -- |
| ----------------------- |
| |
| function M_Included_Except |
| (Left : M.Set; |
| Right : M.Set; |
| Key : Key_Type) return Boolean |
| is |
| begin |
| for E of Left loop |
| if not Contains (Right, E) |
| and not Equivalent_Keys (Generic_Keys.Key (E), Key) |
| then |
| return False; |
| end if; |
| end loop; |
| return True; |
| end M_Included_Except; |
| end Formal_Model; |
| |
| ------------------------- |
| -- Is_Greater_Key_Node -- |
| ------------------------- |
| |
| function Is_Greater_Key_Node |
| (Left : Key_Type; |
| Right : Node_Type) return Boolean |
| is |
| begin |
| return Key (Right.Element) < Left; |
| end Is_Greater_Key_Node; |
| |
| ---------------------- |
| -- Is_Less_Key_Node -- |
| ---------------------- |
| |
| function Is_Less_Key_Node |
| (Left : Key_Type; |
| Right : Node_Type) return Boolean |
| is |
| begin |
| return Left < Key (Right.Element); |
| end Is_Less_Key_Node; |
| |
| --------- |
| -- Key -- |
| --------- |
| |
| function Key (Container : Set; Position : Cursor) return Key_Type is |
| begin |
| if not Has_Element (Container, Position) then |
| raise Constraint_Error with |
| "Position cursor has no element"; |
| end if; |
| |
| pragma Assert (Vet (Container.Content, Position.Node), |
| "bad cursor in Key"); |
| |
| declare |
| N : Tree_Types.Nodes_Type renames Container.Content.Nodes; |
| begin |
| return Key (N (Position.Node).Element); |
| end; |
| end Key; |
| |
| ------------- |
| -- Replace -- |
| ------------- |
| |
| procedure Replace |
| (Container : in out Set; |
| Key : Key_Type; |
| New_Item : Element_Type) |
| is |
| Node : constant Count_Type := Key_Keys.Find (Container.Content, Key); |
| begin |
| if not Has_Element (Container, (Node => Node)) then |
| raise Constraint_Error with |
| "attempt to replace key not in set"; |
| else |
| Replace_Element (Container, Node, New_Item); |
| end if; |
| end Replace; |
| |
| end Generic_Keys; |
| |
| ----------------- |
| -- Has_Element -- |
| ----------------- |
| |
| function Has_Element (Container : Set; Position : Cursor) return Boolean is |
| begin |
| if Position.Node = 0 then |
| return False; |
| else |
| return Container.Content.Nodes (Position.Node).Has_Element; |
| end if; |
| end Has_Element; |
| |
| ------------- |
| -- Include -- |
| ------------- |
| |
| procedure Include (Container : in out Set; New_Item : Element_Type) is |
| Position : Cursor; |
| Inserted : Boolean; |
| |
| begin |
| Insert (Container, New_Item, Position, Inserted); |
| |
| if not Inserted then |
| declare |
| N : Tree_Types.Nodes_Type renames Container.Content.Nodes; |
| begin |
| N (Position.Node).Element := New_Item; |
| end; |
| end if; |
| end Include; |
| |
| ------------ |
| -- Insert -- |
| ------------ |
| |
| procedure Insert |
| (Container : in out Set; |
| New_Item : Element_Type; |
| Position : out Cursor; |
| Inserted : out Boolean) |
| is |
| begin |
| Insert_Sans_Hint (Container.Content, New_Item, Position.Node, Inserted); |
| end Insert; |
| |
| procedure Insert |
| (Container : in out Set; |
| New_Item : Element_Type) |
| is |
| Position : Cursor; |
| Inserted : Boolean; |
| |
| begin |
| Insert (Container, New_Item, Position, Inserted); |
| |
| if not Inserted then |
| raise Constraint_Error with |
| "attempt to insert element already in set"; |
| end if; |
| end Insert; |
| |
| ---------------------- |
| -- Insert_Sans_Hint -- |
| ---------------------- |
| |
| procedure Insert_Sans_Hint |
| (Container : in out Tree_Types.Tree_Type; |
| New_Item : Element_Type; |
| Node : out Count_Type; |
| Inserted : out Boolean) |
| is |
| procedure Set_Element (Node : in out Node_Type); |
| |
| function New_Node return Count_Type; |
| pragma Inline (New_Node); |
| |
| procedure Insert_Post is |
| new Element_Keys.Generic_Insert_Post (New_Node); |
| |
| procedure Conditional_Insert_Sans_Hint is |
| new Element_Keys.Generic_Conditional_Insert (Insert_Post); |
| |
| procedure Allocate is new Generic_Allocate (Set_Element); |
| |
| -------------- |
| -- New_Node -- |
| -------------- |
| |
| function New_Node return Count_Type is |
| Result : Count_Type; |
| begin |
| Allocate (Container, Result); |
| return Result; |
| end New_Node; |
| |
| ----------------- |
| -- Set_Element -- |
| ----------------- |
| |
| procedure Set_Element (Node : in out Node_Type) is |
| begin |
| Node.Element := New_Item; |
| end Set_Element; |
| |
| -- Start of processing for Insert_Sans_Hint |
| |
| begin |
| Conditional_Insert_Sans_Hint |
| (Container, |
| New_Item, |
| Node, |
| Inserted); |
| end Insert_Sans_Hint; |
| |
| ---------------------- |
| -- Insert_With_Hint -- |
| ---------------------- |
| |
| procedure Insert_With_Hint |
| (Dst_Set : in out Tree_Types.Tree_Type; |
| Dst_Hint : Count_Type; |
| Src_Node : Node_Type; |
| Dst_Node : out Count_Type) |
| is |
| Success : Boolean; |
| pragma Unreferenced (Success); |
| |
| procedure Set_Element (Node : in out Node_Type); |
| |
| function New_Node return Count_Type; |
| pragma Inline (New_Node); |
| |
| procedure Insert_Post is |
| new Element_Keys.Generic_Insert_Post (New_Node); |
| |
| procedure Insert_Sans_Hint is |
| new Element_Keys.Generic_Conditional_Insert (Insert_Post); |
| |
| procedure Local_Insert_With_Hint is |
| new Element_Keys.Generic_Conditional_Insert_With_Hint |
| (Insert_Post, Insert_Sans_Hint); |
| |
| procedure Allocate is new Generic_Allocate (Set_Element); |
| |
| -------------- |
| -- New_Node -- |
| -------------- |
| |
| function New_Node return Count_Type is |
| Result : Count_Type; |
| begin |
| Allocate (Dst_Set, Result); |
| return Result; |
| end New_Node; |
| |
| ----------------- |
| -- Set_Element -- |
| ----------------- |
| |
| procedure Set_Element (Node : in out Node_Type) is |
| begin |
| Node.Element := Src_Node.Element; |
| end Set_Element; |
| |
| -- Start of processing for Insert_With_Hint |
| |
| begin |
| Local_Insert_With_Hint |
| (Dst_Set, |
| Dst_Hint, |
| Src_Node.Element, |
| Dst_Node, |
| Success); |
| end Insert_With_Hint; |
| |
| ------------------ |
| -- Intersection -- |
| ------------------ |
| |
| procedure Intersection (Target : in out Set; Source : Set) is |
| begin |
| Set_Ops.Set_Intersection (Target.Content, Source.Content); |
| end Intersection; |
| |
| function Intersection (Left, Right : Set) return Set is |
| begin |
| if Left'Address = Right'Address then |
| return Copy (Left); |
| end if; |
| |
| return S : Set (Count_Type'Min (Length (Left), Length (Right))) do |
| Assign (S.Content, |
| Set_Ops.Set_Intersection (Left.Content, Right.Content)); |
| end return; |
| end Intersection; |
| |
| -------------- |
| -- Is_Empty -- |
| -------------- |
| |
| function Is_Empty (Container : Set) return Boolean is |
| begin |
| return Length (Container) = 0; |
| end Is_Empty; |
| |
| ----------------------------- |
| -- Is_Greater_Element_Node -- |
| ----------------------------- |
| |
| function Is_Greater_Element_Node |
| (Left : Element_Type; |
| Right : Node_Type) return Boolean |
| is |
| begin |
| -- Compute e > node same as node < e |
| |
| return Right.Element < Left; |
| end Is_Greater_Element_Node; |
| |
| -------------------------- |
| -- Is_Less_Element_Node -- |
| -------------------------- |
| |
| function Is_Less_Element_Node |
| (Left : Element_Type; |
| Right : Node_Type) return Boolean |
| is |
| begin |
| return Left < Right.Element; |
| end Is_Less_Element_Node; |
| |
| ----------------------- |
| -- Is_Less_Node_Node -- |
| ----------------------- |
| |
| function Is_Less_Node_Node (L, R : Node_Type) return Boolean is |
| begin |
| return L.Element < R.Element; |
| end Is_Less_Node_Node; |
| |
| --------------- |
| -- Is_Subset -- |
| --------------- |
| |
| function Is_Subset (Subset : Set; Of_Set : Set) return Boolean is |
| begin |
| return Set_Ops.Set_Subset (Subset.Content, Of_Set => Of_Set.Content); |
| end Is_Subset; |
| |
| ---------- |
| -- Last -- |
| ---------- |
| |
| function Last (Container : Set) return Cursor is |
| begin |
| return (if Length (Container) = 0 |
| then No_Element |
| else (Node => Container.Content.Last)); |
| end Last; |
| |
| ------------------ |
| -- Last_Element -- |
| ------------------ |
| |
| function Last_Element (Container : Set) return Element_Type is |
| begin |
| if Last (Container).Node = 0 then |
| raise Constraint_Error with "set is empty"; |
| end if; |
| |
| declare |
| N : Tree_Types.Nodes_Type renames Container.Content.Nodes; |
| begin |
| return N (Last (Container).Node).Element; |
| end; |
| end Last_Element; |
| |
| -------------- |
| -- Left_Son -- |
| -------------- |
| |
| function Left_Son (Node : Node_Type) return Count_Type is |
| begin |
| return Node.Left; |
| end Left_Son; |
| |
| ------------ |
| -- Length -- |
| ------------ |
| |
| function Length (Container : Set) return Count_Type is |
| begin |
| return Container.Content.Length; |
| end Length; |
| |
| ---------- |
| -- Move -- |
| ---------- |
| |
| procedure Move (Target : in out Set; Source : in out Set) is |
| N : Tree_Types.Nodes_Type renames Source.Content.Nodes; |
| X : Count_Type; |
| |
| begin |
| if Target'Address = Source'Address then |
| return; |
| end if; |
| |
| if Target.Capacity < Length (Source) then |
| raise Constraint_Error with -- ??? |
| "Source length exceeds Target capacity"; |
| end if; |
| |
| Clear (Target); |
| |
| loop |
| X := Source.Content.First; |
| exit when X = 0; |
| |
| Insert (Target, N (X).Element); -- optimize??? |
| |
| Tree_Operations.Delete_Node_Sans_Free (Source.Content, X); |
| Free (Source, X); |
| end loop; |
| end Move; |
| |
| ---------- |
| -- Next -- |
| ---------- |
| |
| function Next (Container : Set; Position : Cursor) return Cursor is |
| begin |
| if Position = No_Element then |
| return No_Element; |
| end if; |
| |
| if not Has_Element (Container, Position) then |
| raise Constraint_Error; |
| end if; |
| |
| pragma Assert (Vet (Container.Content, Position.Node), |
| "bad cursor in Next"); |
| return (Node => Tree_Operations.Next (Container.Content, Position.Node)); |
| end Next; |
| |
| procedure Next (Container : Set; Position : in out Cursor) is |
| begin |
| Position := Next (Container, Position); |
| end Next; |
| |
| ------------- |
| -- Overlap -- |
| ------------- |
| |
| function Overlap (Left, Right : Set) return Boolean is |
| begin |
| return Set_Ops.Set_Overlap (Left.Content, Right.Content); |
| end Overlap; |
| |
| ------------ |
| -- Parent -- |
| ------------ |
| |
| function Parent (Node : Node_Type) return Count_Type is |
| begin |
| return Node.Parent; |
| end Parent; |
| |
| -------------- |
| -- Previous -- |
| -------------- |
| |
| function Previous (Container : Set; Position : Cursor) return Cursor is |
| begin |
| if Position = No_Element then |
| return No_Element; |
| end if; |
| |
| if not Has_Element (Container, Position) then |
| raise Constraint_Error; |
| end if; |
| |
| pragma Assert (Vet (Container.Content, Position.Node), |
| "bad cursor in Previous"); |
| |
| declare |
| Node : constant Count_Type := |
| Tree_Operations.Previous (Container.Content, Position.Node); |
| begin |
| return (if Node = 0 then No_Element else (Node => Node)); |
| end; |
| end Previous; |
| |
| procedure Previous (Container : Set; Position : in out Cursor) is |
| begin |
| Position := Previous (Container, Position); |
| end Previous; |
| |
| ------------- |
| -- Replace -- |
| ------------- |
| |
| procedure Replace (Container : in out Set; New_Item : Element_Type) is |
| Node : constant Count_Type := |
| Element_Keys.Find (Container.Content, New_Item); |
| |
| begin |
| if Node = 0 then |
| raise Constraint_Error with |
| "attempt to replace element not in set"; |
| end if; |
| |
| Container.Content.Nodes (Node).Element := New_Item; |
| end Replace; |
| |
| --------------------- |
| -- Replace_Element -- |
| --------------------- |
| |
| procedure Replace_Element |
| (Tree : in out Set; |
| Node : Count_Type; |
| Item : Element_Type) |
| is |
| pragma Assert (Node /= 0); |
| |
| function New_Node return Count_Type; |
| pragma Inline (New_Node); |
| |
| procedure Local_Insert_Post is |
| new Element_Keys.Generic_Insert_Post (New_Node); |
| |
| procedure Local_Insert_Sans_Hint is |
| new Element_Keys.Generic_Conditional_Insert (Local_Insert_Post); |
| |
| procedure Local_Insert_With_Hint is |
| new Element_Keys.Generic_Conditional_Insert_With_Hint |
| (Local_Insert_Post, |
| Local_Insert_Sans_Hint); |
| |
| NN : Tree_Types.Nodes_Type renames Tree.Content.Nodes; |
| |
| -------------- |
| -- New_Node -- |
| -------------- |
| |
| function New_Node return Count_Type is |
| N : Node_Type renames NN (Node); |
| begin |
| N.Element := Item; |
| N.Color := Red; |
| N.Parent := 0; |
| N.Right := 0; |
| N.Left := 0; |
| return Node; |
| end New_Node; |
| |
| Hint : Count_Type; |
| Result : Count_Type; |
| Inserted : Boolean; |
| |
| -- Start of processing for Insert |
| |
| begin |
| if Item < NN (Node).Element |
| or else NN (Node).Element < Item |
| then |
| null; |
| |
| else |
| NN (Node).Element := Item; |
| return; |
| end if; |
| |
| Hint := Element_Keys.Ceiling (Tree.Content, Item); |
| |
| if Hint = 0 then |
| null; |
| |
| elsif Item < NN (Hint).Element then |
| if Hint = Node then |
| NN (Node).Element := Item; |
| return; |
| end if; |
| |
| else |
| pragma Assert (not (NN (Hint).Element < Item)); |
| raise Program_Error with "attempt to replace existing element"; |
| end if; |
| |
| Tree_Operations.Delete_Node_Sans_Free (Tree.Content, Node); |
| |
| Local_Insert_With_Hint |
| (Tree => Tree.Content, |
| Position => Hint, |
| Key => Item, |
| Node => Result, |
| Inserted => Inserted); |
| |
| pragma Assert (Inserted); |
| pragma Assert (Result = Node); |
| end Replace_Element; |
| |
| procedure Replace_Element |
| (Container : in out Set; |
| Position : Cursor; |
| New_Item : Element_Type) |
| is |
| begin |
| if not Has_Element (Container, Position) then |
| raise Constraint_Error with |
| "Position cursor has no element"; |
| end if; |
| |
| pragma Assert (Vet (Container.Content, Position.Node), |
| "bad cursor in Replace_Element"); |
| |
| Replace_Element (Container, Position.Node, New_Item); |
| end Replace_Element; |
| |
| --------------- |
| -- Right_Son -- |
| --------------- |
| |
| function Right_Son (Node : Node_Type) return Count_Type is |
| begin |
| return Node.Right; |
| end Right_Son; |
| |
| --------------- |
| -- Set_Color -- |
| --------------- |
| |
| procedure Set_Color |
| (Node : in out Node_Type; |
| Color : Red_Black_Trees.Color_Type) |
| is |
| begin |
| Node.Color := Color; |
| end Set_Color; |
| |
| -------------- |
| -- Set_Left -- |
| -------------- |
| |
| procedure Set_Left (Node : in out Node_Type; Left : Count_Type) is |
| begin |
| Node.Left := Left; |
| end Set_Left; |
| |
| ---------------- |
| -- Set_Parent -- |
| ---------------- |
| |
| procedure Set_Parent (Node : in out Node_Type; Parent : Count_Type) is |
| begin |
| Node.Parent := Parent; |
| end Set_Parent; |
| |
| --------------- |
| -- Set_Right -- |
| --------------- |
| |
| procedure Set_Right (Node : in out Node_Type; Right : Count_Type) is |
| begin |
| Node.Right := Right; |
| end Set_Right; |
| |
| -------------------------- |
| -- Symmetric_Difference -- |
| -------------------------- |
| |
| procedure Symmetric_Difference (Target : in out Set; Source : Set) is |
| begin |
| Set_Ops.Set_Symmetric_Difference (Target.Content, Source.Content); |
| end Symmetric_Difference; |
| |
| function Symmetric_Difference (Left, Right : Set) return Set is |
| begin |
| if Left'Address = Right'Address then |
| return Empty_Set; |
| end if; |
| |
| if Length (Right) = 0 then |
| return Copy (Left); |
| end if; |
| |
| if Length (Left) = 0 then |
| return Copy (Right); |
| end if; |
| |
| return S : Set (Length (Left) + Length (Right)) do |
| Assign |
| (S.Content, |
| Set_Ops.Set_Symmetric_Difference (Left.Content, Right.Content)); |
| end return; |
| end Symmetric_Difference; |
| |
| ------------ |
| -- To_Set -- |
| ------------ |
| |
| function To_Set (New_Item : Element_Type) return Set is |
| Node : Count_Type; |
| Inserted : Boolean; |
| begin |
| return S : Set (Capacity => 1) do |
| Insert_Sans_Hint (S.Content, New_Item, Node, Inserted); |
| pragma Assert (Inserted); |
| end return; |
| end To_Set; |
| |
| ----------- |
| -- Union -- |
| ----------- |
| |
| procedure Union (Target : in out Set; Source : Set) is |
| begin |
| Set_Ops.Set_Union (Target.Content, Source.Content); |
| end Union; |
| |
| function Union (Left, Right : Set) return Set is |
| begin |
| if Left'Address = Right'Address then |
| return Copy (Left); |
| end if; |
| |
| if Length (Left) = 0 then |
| return Copy (Right); |
| end if; |
| |
| if Length (Right) = 0 then |
| return Copy (Left); |
| end if; |
| |
| return S : Set (Length (Left) + Length (Right)) do |
| Assign (S, Source => Left); |
| Union (S, Right); |
| end return; |
| end Union; |
| |
| end Ada.Containers.Formal_Ordered_Sets; |
