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293 | --
-- Copyright (C) 2022-2023, AdaCore
--
-- SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
--
with Ada.Exceptions;
with VSS.Strings.Internals;
package body VSS.Implementation.Referrers is
------------
-- Adjust --
------------
overriding procedure Adjust (Self : in out Referal_Base) is
Owner : constant Magic_String_Access := Self.Owner;
begin
Self.Owner := null;
Self.Next := null;
Self.Previous := null;
if Owner /= null then
Self.Connect (Owner);
end if;
end Adjust;
-------------
-- Connect --
-------------
procedure Connect
(Self : in out Referal_Base'Class;
Owner : not null Magic_String_Access) is
begin
if Owner.Head = null then
Owner.Head := Self'Unchecked_Access;
Owner.Tail := Self'Unchecked_Access;
else
Owner.Tail.Next := Self'Unchecked_Access;
Self.Previous := Owner.Tail;
Owner.Tail := Self'Unchecked_Access;
end if;
Self.Owner := Owner;
end Connect;
-------------
-- Connect --
-------------
procedure Connect
(Self : in out Referal_Limited_Base'Class;
Owner : not null Magic_String_Access) is
begin
if Owner.Limited_Head = null then
Owner.Limited_Head := Self'Unchecked_Access;
Owner.Limited_Tail := Self'Unchecked_Access;
else
Owner.Limited_Tail.Next := Self'Unchecked_Access;
Self.Previous := Owner.Limited_Tail;
Owner.Limited_Tail := Self'Unchecked_Access;
end if;
Self.Owner := Owner;
end Connect;
-------------
-- Connect --
-------------
procedure Connect
(Self : in out Referal_Limited_Base'Class;
Owner : aliased VSS.Strings.Virtual_String'Class) is
begin
Self.Connect
(VSS.Strings.Internals.To_Magic_String_Access
(Owner'Unrestricted_Access));
end Connect;
----------------
-- Disconnect --
----------------
procedure Disconnect (Self : in out Referal_Base'Class) is
begin
if Self.Owner /= null then
if Self.Owner.Head = Self'Unchecked_Access then
Self.Owner.Head := Self.Owner.Head.Next;
end if;
if Self.Owner.Tail = Self'Unchecked_Access then
Self.Owner.Tail := Self.Owner.Tail.Previous;
end if;
if Self.Previous /= null then
Self.Previous.Next := Self.Next;
end if;
if Self.Next /= null then
Self.Next.Previous := Self.Previous;
end if;
Self.Owner := null;
Self.Previous := null;
Self.Next := null;
end if;
end Disconnect;
----------------
-- Disconnect --
----------------
procedure Disconnect (Self : in out Referal_Limited_Base'Class) is
begin
if Self.Owner /= null then
if Self.Owner.Limited_Head = Self'Unchecked_Access then
Self.Owner.Limited_Head := Self.Owner.Limited_Head.Next;
end if;
if Self.Owner.Limited_Tail = Self'Unchecked_Access then
Self.Owner.Limited_Tail := Self.Owner.Limited_Tail.Previous;
end if;
if Self.Previous /= null then
Self.Previous.Next := Self.Next;
end if;
if Self.Next /= null then
Self.Next.Previous := Self.Previous;
end if;
Self.Owner := null;
Self.Previous := null;
Self.Next := null;
end if;
end Disconnect;
--------------
-- Finalize --
--------------
overriding procedure Finalize (Self : in out Magic_String_Base) is
begin
-- Invalidate and disconnect all referals
while Self.Head /= null loop
Self.Head.Invalidate;
Self.Head.Disconnect;
end loop;
while Self.Limited_Head /= null loop
Self.Limited_Head.Invalidate;
Self.Limited_Head.Disconnect;
end loop;
end Finalize;
--------------
-- Finalize --
--------------
overriding procedure Finalize (Self : in out Referal_Base) is
begin
if Self.Owner /= null then
Referal_Base'Class (Self).Invalidate;
Self.Disconnect;
end if;
end Finalize;
--------------
-- Finalize --
--------------
overriding procedure Finalize (Self : in out Referal_Limited_Base) is
begin
if Self.Owner /= null then
Referal_Limited_Base'Class (Self).Invalidate;
Self.Disconnect;
end if;
end Finalize;
---------------
-- Get_Owner --
---------------
function Get_Owner
(Self : Referal_Base'Class) return Virtual_String_Access is
begin
return VSS.Strings.Internals.To_Virtual_String_Access (Self.Owner);
end Get_Owner;
---------------
-- Get_Owner --
---------------
function Get_Owner
(Self : Referal_Limited_Base'Class) return Virtual_String_Access is
begin
return VSS.Strings.Internals.To_Virtual_String_Access (Self.Owner);
end Get_Owner;
----------------------------
-- Notify_String_Modified --
----------------------------
procedure Notify_String_Modified
(Self : in out Magic_String_Base'Class;
From : VSS.Implementation.Strings.Cursor;
Removed : VSS.Implementation.Strings.Cursor_Offset;
Inserted : VSS.Implementation.Strings.Cursor_Offset)
is
use type Ada.Exceptions.Exception_Id;
Occurrence : Ada.Exceptions.Exception_Occurrence;
begin
declare
Current : Referal_Limited_Access := Self.Limited_Head;
Next : Referal_Limited_Access;
begin
while Current /= null loop
Next := Current.Next;
begin
Current.String_Modified (From, Removed, Inserted);
exception
when X : others =>
if Ada.Exceptions.Exception_Identity (Occurrence)
= Ada.Exceptions.Null_Id
then
-- Save first raised exception only.
Ada.Exceptions.Save_Occurrence (Occurrence, X);
end if;
end;
Current := Next;
end loop;
end;
declare
Current : Referal_Access := Self.Head;
Next : Referal_Access;
begin
while Current /= null loop
Next := Current.Next;
begin
Current.String_Modified (From, Removed, Inserted);
exception
when X : others =>
if Ada.Exceptions.Exception_Identity (Occurrence)
= Ada.Exceptions.Null_Id
then
-- Save first raised exception only.
Ada.Exceptions.Save_Occurrence (Occurrence, X);
end if;
end;
Current := Next;
end loop;
end;
Ada.Exceptions.Reraise_Occurrence (Occurrence);
end Notify_String_Modified;
---------------
-- Reconnect --
---------------
procedure Reconnect
(Self : in out Referal_Limited_Base'Class;
Owner : Magic_String_Access) is
begin
if Self.Owner /= Owner then
Self.Disconnect;
if Owner /= null then
Self.Connect (Owner);
end if;
end if;
end Reconnect;
end VSS.Implementation.Referrers;
|