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289 | -- --
-- package Copyright (c) Dmitry A. Kazakov --
-- GNAT.Sockets.Connection_State_Machine. Luebeck --
-- ASN1.Strings Spring, 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 Strings_Edit.Integers; use Strings_Edit.Integers;
with Strings_Edit.UTF8.Handling; use Strings_Edit.UTF8.Handling;
with GNAT.Sockets.Connection_State_Machine.ASN1.Lengths;
use GNAT.Sockets.Connection_State_Machine.ASN1.Lengths;
with Ada.Unchecked_Conversion;
with Strings_Edit.UTF8.ITU_T61;
with System.Address_To_Access_Conversions;
package body GNAT.Sockets.Connection_State_Machine.ASN1.Strings.
Implicit is
procedure Encode
( Item : Implicit_External_String_Data_Item;
Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
begin
case Get_ASN1_Type (ASN1_Data_Item'Class (Item)) is
when Universal_String_Tag =>
Put_Universal (Data, Pointer, Get_Value (Item));
when Character_String_Tag =>
Put_Latin1 (Data, Pointer, Get_Value (Item));
when BMP_String_Tag =>
Put_BMP (Data, Pointer, Get_Value (Item));
when others =>
Put (Data, Pointer, Get_Value (Item));
end case;
end Encode;
procedure Encode
( Item : Implicit_String_Data_Item;
Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
begin
case Get_ASN1_Type (ASN1_Data_Item'Class (Item)) is
when Universal_String_Tag =>
Put_Universal (Data, Pointer, Item.Value (1..Item.Length));
when Character_String_Tag =>
Put_Latin1 (Data, Pointer, Item.Value (1..Item.Length));
when BMP_String_Tag =>
Put_BMP (Data, Pointer, Item.Value (1..Item.Length));
when others =>
Put (Data, Pointer, Item.Value (1..Item.Length));
end case;
end Encode;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Item : Implicit_External_String_Data_Item
) is
procedure Find
( Object : in out
Implicit_External_String_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,
( "Missing buffer for externally buffered "
& "ASN.1 string"
) );
end if;
exit when This.all in External_String_Buffer'Class;
This := This.Previous;
end loop;
Object.Driver.Buffer :=
External_String_Buffer'Class (This.all)'Unchecked_Access;
end Find;
begin
Check_Initialization_Stream (Item, Stream.all);
declare
This : Initialization_Stream'Class renames
Initialization_Stream'Class (Stream.all);
begin
if Item.Driver.Buffer = 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 Implicit_External_String_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 Item.Driver.Buffer = null then
Uninitialized (Item);
end if;
Feed (Item, Item.Driver, Data, Pointer, Client, State);
end Feed;
procedure Feed
( Item : in out Implicit_String_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
Feed (Item, Item.Driver, Data, Pointer, Client, State);
end Feed;
function Get_ASN1_Type
( Item : Implicit_External_String_Data_Item
) return ASN1_Type is
begin
return UTF8_String_Tag;
end Get_ASN1_Type;
function Get_Buffer
( Item : Implicit_External_String_Data_Item
) return External_String_Buffer_Ptr is
begin
return Item.Driver.Buffer;
end Get_Buffer;
function Get_Data
( Item : Implicit_String_Data_Item
) return String_Data_Ptr is
begin
return Self (Item).Driver'Unchecked_Access;
end Get_Data;
function Get_Data
( Item : Implicit_External_String_Data_Item
) return String_Data_Ptr is
begin
return Self (Item).Driver'Unchecked_Access;
end Get_Data;
function Get_Length
( Item : Implicit_External_String_Data_Item
) return Natural is
begin
if Item.Driver.Buffer = null then
return 0;
else
return Item.Driver.Length;
end if;
end Get_Length;
function Get_Value
( Item : Implicit_External_String_Data_Item
) return String is
begin
if Item.Driver.Buffer = null then
return "";
else
return Item.Driver.Buffer.Buffer
( Item.Driver.Start
.. Item.Driver.Start + Item.Driver.Length - 1
);
end if;
end Get_Value;
function Is_Implicit (Item : Implicit_External_String_Data_Item)
return Boolean is
begin
return True;
end Is_Implicit;
function Is_Implicit (Item : Implicit_String_Data_Item)
return Boolean is
begin
return True;
end Is_Implicit;
function Self
( Item : Implicit_External_String_Data_Item'Class
) return Implicit_External_String_Data_Item_Ptr is
package From_Address is
new System.Address_To_Access_Conversions
( Implicit_External_String_Data_Item'Class
);
use From_Address;
begin
return To_Pointer (Item'Address).all'Unchecked_Access;
end Self;
function Self
( Item : Implicit_String_Data_Item'Class
) return Implicit_String_Data_Item_Ptr is
package From_Address is
new System.Address_To_Access_Conversions
( Implicit_String_Data_Item'Class
);
use From_Address;
begin
return To_Pointer (Item'Address).all'Unchecked_Access;
end Self;
procedure Set_Implicit_Tag
( Item : in out Implicit_String_Data_Item;
Tag : Tag_Type;
Length : Stream_Element_Offset
) is
begin
if Length >= 0 then
Item.Driver.Last := Length;
Item.Driver.Definite := True;
else
Item.Driver.Last := 0;
Item.Driver.Definite := False;
end if;
end Set_Implicit_Tag;
procedure Set_Implicit_Tag
( Item : in out Implicit_External_String_Data_Item;
Tag : Tag_Type;
Length : Stream_Element_Offset
) is
begin
if Length >= 0 then
Item.Driver.Last := Length;
Item.Driver.Definite := True;
else
Item.Driver.Last := 0;
Item.Driver.Definite := False;
end if;
end Set_Implicit_Tag;
procedure Set_Value
( Item : in out Implicit_External_String_Data_Item;
Value : String
) is
Driver : External_String_Data renames Item.Driver;
begin
if Driver.Buffer = null then
Uninitialized (Item);
elsif ( Value'Length
> Driver.Buffer.Size - Driver.Buffer.Length
) then
Raise_Exception (Storage_Error'Identity, Too_Large);
else
Driver.Start := Driver.Buffer.Length + 1;
Driver.Length := Value'Length;
Driver.Buffer.Buffer
( Driver.Start
.. Driver.Start + Value'Length - 1
) := Value;
Driver.Buffer.Length := Driver.Buffer.Length + Value'Length;
end if;
end Set_Value;
end GNAT.Sockets.Connection_State_Machine.ASN1.Strings.Implicit;
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