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313 | -- --
-- package Copyright (c) Dmitry A. Kazakov --
-- GNAT.Sockets.Connection_State_Machine. Luebeck --
-- ASN1.Sets Summer, 2019 --
-- Implementation --
-- Last revision : 13:37 03 Aug 2019 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, or (at your option) any later version. This library --
-- is distributed in the hope that it will be useful, but WITHOUT --
-- ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have --
-- received a copy of the GNU General Public License along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from --
-- this unit, or you link this unit with other files to produce an --
-- executable, this unit does not by itself cause the resulting --
-- executable to be covered by the GNU General Public License. This --
-- exception does not however invalidate any other reasons why the --
-- executable file might be covered by the GNU Public License. --
--____________________________________________________________________--
with Ada.Exceptions; use Ada.Exceptions;
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
with Ada.Tags; use Ada.Tags;
with Ada.Unchecked_Conversion;
with System.Address_To_Access_Conversions;
package body GNAT.Sockets.Connection_State_Machine.ASN1.Sets is
procedure Uninitialized (Item : ASN1_Data_Item'Class) is
begin
Raise_Exception
( Use_Error'Identity,
( "ASN.1 "
& Image (Get_ASN1_Type (Item))
& " "
& Expanded_Name (Item'Tag)
& " was not properly initialized"
) );
end Uninitialized;
function Always_Constructed
( Item : Reference_Data_Item
) return Boolean is
begin
if Item.Container = null or else Item.Target = null then
return False;
else
return Always_Constructed (Item.Target.all);
end if;
end Always_Constructed;
procedure Check
( Container : ASN1_Data_Item'Class;
Item : Data_Item'Class
) is
begin
if Item not in Abstract_ASN1_Data_Item'Class then
Raise_Exception
( Use_Error'Identity,
( "ASN.1 "
& Image (Get_ASN1_Type (Container))
& " contains non ASN.1 object "
& Expanded_Name (Item'Tag)
) );
end if;
end Check;
procedure Encode
( Item : Reference_Data_Item;
Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
begin
if Item.Container = null then
Raise_Exception (Data_Error'Identity, Unset);
elsif Item.Target = null then
null;
else
Encode (Item.Target.all, Data, Pointer);
end if;
end Encode;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Item : Reference_Data_Item
) is
procedure Find
( Object : in out Reference_Data_Item'Class;
Shared : Shared_Data_Item_Ptr
) is
This : Shared_Data_Item_Ptr := Shared;
begin
loop
if This = null then
Raise_Exception (Use_Error'Identity, No_Container);
end if;
exit when This.all in External_String_Buffer'Class;
This := This.Previous;
end loop;
Object.Container :=
External_String_Buffer'Class (This.all)'Unchecked_Access;
end Find;
begin
Check_Initialization_Stream (Item, Stream.all);
declare
Count : Data_Item_Offset := 0;
This : Initialization_Stream'Class renames
Initialization_Stream'Class (Stream.all);
begin
if Item.Container = null then
if This.Parent = null then
Find (Self (Item).all, This.Shared);
else
Find (Self (Item).all, This.Parent.all);
end if;
end if;
Enumerate (Stream, ASN1_Data_Item (Item));
end;
end Enumerate;
procedure Feed
( Item : in out Reference_Data_Item;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
) is
procedure Call_Item (Element : Abstract_ASN1_Data_Item_Ptr) is
List : Sequence renames Item.List;
begin
List.Caller := null;
List.State := 0;
List.Current := 1;
List.List (1) := Element.all'Unchecked_Access;
Call (Client, Pointer, List'Unchecked_Access);
State := 0;
end Call_Item;
begin
if State = 0 then
if Item.Container = null then
Uninitialized (Item);
end if;
Item.Target :=
Create (Reference_Data_Item'Class (Item)'Unchecked_Access);
Register_Allocator (Item);
declare
Stream : aliased Initialization_Stream;
begin
Stream.Shared := Item.Container.all'Unchecked_Access;
Abstract_ASN1_Data_Item'Class'Write
( Stream'Access,
Item.Target.all
);
end;
Call_Item (Item.Target);
else
Feed
( Item => Item.Target.all,
Data => Data,
Pointer => Pointer,
Client => Client,
State => State
);
end if;
end Feed;
procedure Finalize (Item : in out Reference_Data_Item) is
begin
Freed (Item);
Finalize (ASN1_Data_Item (Item));
end Finalize;
procedure Freed (Item : in out Reference_Data_Item) is
begin
if Item.Registered then
declare
type Element_Type_Ptr is
access Abstract_ASN1_Data_Item'Class;
for Element_Type_Ptr'Storage_Pool use Item.Container.Pool;
function Convert is
new Ada.Unchecked_Conversion
( Abstract_ASN1_Data_Item_Ptr,
Element_Type_Ptr
);
procedure Free is
new Ada.Unchecked_Deallocation
( Abstract_ASN1_Data_Item'Class,
Element_Type_Ptr
);
This : Element_Type_Ptr;
begin
Item.Registered := False;
This := Convert (Item.Target);
Free (This);
end;
end if;
Item.Target := null;
end Freed;
function Get
( Item : Reference_Data_Item;
Allocate : Boolean := False
) return Abstract_ASN1_Data_Item_Ptr is
begin
if Item.Container = null then
Uninitialized (Item);
elsif Item.Target = null then
if not Allocate then
Raise_Exception (Data_Error'Identity, Unset);
end if;
declare
Stream : aliased Initialization_Stream;
Object : Reference_Data_Item'Class renames Self (Item).all;
begin
Register_Allocator (Object);
Object.Target := Create (Object'Access);
Stream.Shared := Item.Container.all'Unchecked_Access;
Abstract_ASN1_Data_Item'Class'Write
( Stream'Access,
Item.Target.all
);
end;
end if;
return Item.Target;
end Get;
function Get_ASN1_Type
( Item : Reference_Data_Item
) return ASN1_Type is
begin
if Item.Container = null or else Item.Target = null then
Raise_Exception (Data_Error'Identity, Unset);
else
return Get_ASN1_Type
( ASN1.ASN1_Data_Item'Class (Item.Target.all)
);
end if;
end Get_ASN1_Type;
function Get_Children
( Item : Reference_Data_Item
) return Data_Item_Ptr_Array is
begin
if Item.Container = null then
Raise_Exception (Data_Error'Identity, Unset);
elsif Item.Target = null then
return (1..0 => null);
else
return Get_Children
( ASN1.ASN1_Data_Item'Class (Item.Target.all)
);
end if;
end Get_Children;
function Get_Container
( Item : Reference_Data_Item
) return External_String_Buffer_Ptr is
begin
return Item.Container;
end Get_Container;
function Get_Size
( Item : Reference_Data_Item
) return Natural is
begin
if Item.Target = null then
return 1;
else
return Get_Size (Item.Target.all);
end if;
end Get_Size;
function Is_Implicit
( Item : Reference_Data_Item
) return Boolean is
begin
if Item.Container = null or else Item.Target = null then
Raise_Exception (Data_Error'Identity, Unset);
else
return Is_Implicit (Item.Target.all);
end if;
end Is_Implicit;
procedure Register_Allocator (Item : in out Reference_Data_Item) is
begin
if not Item.Registered then
Item.Registered := True;
Item.Notifier.Previous := Item.Container.Allocators;
Item.Container.Allocators := Item.Notifier'Unchecked_Access;
end if;
end Register_Allocator;
function Self
( Item : Reference_Data_Item'Class
) return Reference_Data_Item_Ptr is
package From_Set_Address is
new System.Address_To_Access_Conversions
( Reference_Data_Item'Class
);
use From_Set_Address;
begin
return To_Pointer (Item'Address).all'Unchecked_Access;
end Self;
end GNAT.Sockets.Connection_State_Machine.ASN1.Sets;
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