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132 | -- --
-- package Copyright (c) Dmitry A. Kazakov --
-- GNAT.Sockets.Connection_State_Machine. Luebeck --
-- ASN1.Nulls Spring, 2019 --
-- Implementation --
-- Last revision : 10:13 29 Nov 2020 --
-- --
-- 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 GNAT.Sockets.Connection_State_Machine.ASN1.Lengths;
use GNAT.Sockets.Connection_State_Machine.ASN1.Lengths;
package body GNAT.Sockets.Connection_State_Machine.ASN1.Nulls is
procedure Encode
( Item : Implicit_Null_Data_Item;
Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
begin
null;
end Encode;
procedure Encode
( Item : Null_Data_Item;
Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
begin
if ( Pointer < Data'First
or else
( Pointer > Data'Last
and then
Pointer - Data'Last /= 1
) ) then
Raise_Exception (Layout_Error'Identity, Out_Of_Bounds);
elsif Data'Last - Pointer < 1 then
Raise_Exception (End_Error'Identity, No_Room);
end if;
Data (Pointer ) := Stream_Element (Null_Tag);
Data (Pointer + 1) := 0;
Pointer := Pointer + 2;
end Encode;
procedure Feed
( Item : in out Null_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
begin
if State = 0 then
Check (Data (Pointer), (1 => Null_Tag), True);
Pointer := Pointer + 1;
State := 1;
if Pointer > Data'Last then
return;
end if;
end if;
if Data (Pointer) /= 0 then
Raise_Exception (Data_Error'Identity, Invalid_Length);
end if;
Pointer := Pointer + 1;
State := 0;
end Feed;
procedure Feed
( Item : in out Implicit_Null_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
begin
State := 0;
end Feed;
function Get_ASN1_Type
( Item : Implicit_Null_Data_Item
) return ASN1_Type is
begin
return Null_Tag;
end Get_ASN1_Type;
function Is_Implicit (Item : Implicit_Null_Data_Item)
return Boolean is
begin
return True;
end Is_Implicit;
function Is_Implicit (Item : Null_Data_Item) return Boolean is
begin
return False;
end Is_Implicit;
procedure Set_Implicit_Tag
( Item : in out Implicit_Null_Data_Item;
Tag : Tag_Type;
Length : Stream_Element_Offset
) is
begin
null;
end Set_Implicit_Tag;
procedure Set_Untagged (Item : in out Implicit_Null_Data_Item) is
begin
null;
end Set_Untagged;
end GNAT.Sockets.Connection_State_Machine.ASN1.Nulls;
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