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1030 | -- --
-- package Copyright (c) Dmitry A. Kazakov --
-- GNAT.Sockets.Connection_State_Machine Luebeck --
-- Implementation Winter, 2012 --
-- --
-- Last revision : 18:40 23 Oct 2021 --
-- --
-- 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 Ada.Unchecked_Deallocation;
with Generic_Map;
with System.Address_Image;
with System.Address_To_Access_Conversions;
package body GNAT.Sockets.Connection_State_Machine is
procedure Check_Initialization_Stream
( Item : Data_Item'Class;
Stream : Root_Stream_Type'Class
) is
begin
if Stream not in Initialization_Stream'Class then
Raise_Exception
( Use_Error'Identity,
( "Stream attribute of "
& Expanded_Name (Item'Tag)
& " used with a non-initialization stream "
& Expanded_Name (Stream'Tag)
) );
end if;
end Check_Initialization_Stream;
procedure Generic_Dump_Stream
( Stream : Initialization_Stream'Class;
Prefix : String := ""
) is
use Strings_Edit;
Trailer : constant String (Prefix'Range) := (others => ' ');
begin
Put_Line
( Prefix
& "stream at "
& System.Address_Image (Stream'Address)
& " items: "
& Image (Integer (Stream.Count))
& ", to ignore next: "
& Image (Integer (Stream.Ignore))
);
for Index in 1..Stream.Count loop
Put_Line
( Trailer
& Image (Integer (Index))
& " "
& Ada.Tags.Expanded_Name (Get (Stream.Data, Index).all'Tag)
& " at "
& System.Address_Image (Get (Stream.Data, Index).all'Address)
);
end loop;
end Generic_Dump_Stream;
package body Generic_Dump is
procedure Put is new Generic_Dump_Stream;
procedure Put
( Item : Data_Item'Class;
Prefix : String := ""
) is
begin
Put_Line
( Prefix
& Ada.Tags.Expanded_Name (Item'Tag)
& " at "
& System.Address_Image (Item'Address)
);
declare
Nested : constant Data_Item_Ptr_Array := Get_Children (Item);
begin
if Nested'Length > 0 then
declare
Trailer : constant String (Prefix'Range) :=
(others => ' ');
begin
for Index in Nested'Range loop
Put
( Nested (Index).all,
Trailer & " " & Image (Integer (Index)) & " "
);
end loop;
end;
end if;
end;
end Put;
procedure Put
( Buffer : in out External_String_Buffer;
Prefix : String
) is
Trailer : constant String (Prefix'Range) := (others => ' ');
This : Allocator_Data_Ptr := Buffer.Allocators;
begin
Put_Line
( Prefix
& "external buffer at "
& System.Address_Image (Buffer'Address)
& " allocators: "
);
for Index in Positive'Range loop
exit when This = null;
Put
( Trailer
& " "
& Image (Index)
& " at "
& System.Address_Image (This.all'Address)
);
Put_Line
( " -> "
& Ada.Tags.Expanded_Name (This.Allocator.all'Tag)
& " at "
& System.Address_Image (This.Allocator.all'Address)
);
This := This.Previous;
end loop;
end Put;
procedure Put_Stream
( Item : Data_Item'Class;
Prefix : String := ""
) is
Buffer : aliased External_String_Buffer (64);
Stream : aliased Initialization_Stream;
begin
Stream.Shared := Buffer'Unchecked_Access;
Data_Item'Class'Write (Stream'Access, Item);
Put (Stream, Prefix);
end Put_Stream;
procedure Put_Call_Stack
( Client : State_Machine'Class;
Prefix : String := ""
) is
Depth : Natural := 0;
This : Sequence_Ptr := Client.Data;
begin
while This /= null loop
Depth := Depth + 1;
This := This.Caller;
end loop;
declare
Stack : Sequence_Array (1..Depth);
procedure Dump
( Start : Positive;
Prefix : String
) is
This : Sequence renames Stack (Start).all;
List : Data_Item_Ptr_Array renames This.List;
begin
for Index in List'Range loop
if Index = This.Current then
Put_Line
( Prefix
& "->"
& Image (Integer (Index))
& " "
& Ada.Tags.Expanded_Name (List (Index).all'Tag)
);
if Start < Stack'Last then
Dump (Start + 1, Prefix & " ");
end if;
else
Put_Line
( Prefix
& " "
& Image (Integer (Index))
& " "
& Ada.Tags.Expanded_Name (List (Index).all'Tag)
);
end if;
end loop;
end Dump;
begin
This := Client.Data;
for Index in reverse Stack'Range loop
Stack (Index) := This;
This := This.Caller;
end loop;
Put_Line (Prefix & Ada.Tags.Expanded_Name (Client'Tag));
Dump (1, Prefix & " ");
end;
end Put_Call_Stack;
end Generic_Dump;
package Address_Maps is
new Generic_Map
( Key_Type => System.Address,
Object_Type => Natural,
"<" => System."<",
"=" => System."="
);
Prefixes : Address_Maps.Map;
function Get_Prefix
( Stream : Root_Stream_Type'Class
) return String is
use Address_Maps;
Offset : constant Integer := Find (Prefixes, Stream'Address);
begin
if Offset > 0 then
declare
Result : constant String (1..Get (Prefixes, Offset)) :=
(others => ' ');
begin
return Result & System.Address_Image (Stream'Address) & ' ';
end;
else
return "";
end if;
end Get_Prefix;
procedure Set_Prefix
( Stream : Root_Stream_Type'Class;
Prefix : Natural
) is
use Address_Maps;
begin
Replace (Prefixes, Stream'Address, Prefix);
end Set_Prefix;
procedure Add
( Stream : in out Initialization_Stream;
Item : Data_Item'Class;
Nested : Data_Item_Offset := 0
) is
begin
if Stream.Ignore > 0 then
Stream.Ignore := Stream.Ignore - 1;
else
Stream.Count := Stream.Count + 1;
Put (Stream.Data, Stream.Count, Self (Item));
end if;
Stream.Ignore := Stream.Ignore + Nested;
end Add;
procedure Allocate
( Pool : in out Arena_Pool;
Address : out System.Address;
Size : Storage_Count;
Alignment : Storage_Count
) is
Size_In_Characters : constant Storage_Count :=
( (Size * System.Storage_Unit + Character'Size - 1)
/ Character'Size
);
Length : Natural renames Pool.Parent.Length;
Buffer : String renames Pool.Parent.Buffer;
Last : Integer;
begin
Align_To_The_Margin :
for Index in 1..Alignment loop
exit when Length >= Buffer'Last;
if Buffer (Length + 1)'Address mod Alignment = 0 then
Last := Length + Natural (Size_In_Characters);
loop
exit Align_To_The_Margin when Last >= Buffer'Last;
exit when ( ( Buffer (Last + 1)'Address
- Buffer (Length + 1)'Address
)
<= Size
);
Last := Last + 1;
end loop;
Address := Buffer (Length + 1)'Address;
Length := Last + 1;
Pool.Parent.Count := Pool.Parent.Count + 1;
return;
end if;
Length := Length + 1;
end loop Align_To_The_Margin;
Raise_Exception
( Storage_Error'Identity,
( "Arena pool exhausted, "
& Image (Length)
& " used out of "
& Image (Buffer'Last)
& ", items allocated,"
& Storage_Count'Image (Size)
& " requested"
) );
end Allocate;
procedure Call
( Client : in out State_Machine;
Pointer : Stream_Element_Offset;
Data : Sequence_Ptr;
State : Stream_Element_Offset := 0
) is
begin
Client.Fed := Client.Fed + Unsigned_64 (Pointer - Client.Start);
Client.Start := Pointer;
Data.Caller := Client.Data;
Client.Data := Data;
Data.Current := 0;
Data.State := State;
end Call;
procedure Clear (Client : in out State_Machine) is
begin
Clear (Connection (Client));
Client.State := 0;
Client.Start := 0;
if Client.Data /= null then
loop
Client.Data.Current := 1;
Client.Data.State := 0;
exit when Client.Data.Caller = null;
Client.Data := Client.Data.Caller;
end loop;
end if;
end Clear;
procedure Connected (Client : in out State_Machine) is
Stream : aliased Initialization_Stream;
begin
if not Client.Once then
Client.Once := True;
Initialize (Connection (Client));
State_Machine'Class'Write
( Stream'Access,
State_Machine'Class (Client)
);
Free (Client.Data);
if Stream.Count > 0 then
Client.Data :=
new Sequence'
( Length => Stream.Count,
Caller => null,
State => 0,
Current => 1,
List => Stream.Data.Vector (1..Stream.Count)
);
end if;
end if;
end Connected;
procedure Deallocate
( Pool : in out Arena_Pool;
Address : System.Address;
Size : Storage_Count;
Alignment : Storage_Count
) is
begin
null;
end Deallocate;
procedure End_Of_Subsequence
( Item : in out Data_Item;
Data : Stream_Element_Array;
Pointer : Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
) is
begin
null;
end End_Of_Subsequence;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Pool : Arena_Pool
) is
begin
null;
end Enumerate;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Item : State_Machine
) is
begin
null;
end Enumerate;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Item : Data_Block
) is
begin
Check_Initialization_Stream (Item, Stream.all);
declare
Count : Data_Item_Offset := 0;
Block : Data_Block'Class renames Self (Item).all;
This : Initialization_Stream'Class renames
Initialization_Stream'Class (Stream.all);
begin
if not Item.Initialized then
declare
Counter : aliased Initialization_Stream;
begin
if This.Parent = null then
Counter.Parent := This.Shared'Access;
else
Counter.Parent := This.Parent;
end if;
Block.Initialized := True;
Data_Block'Class'Write (Counter'Access, Block);
if Counter.Count <= 1 then
Raise_Exception
( Use_Error'Identity,
( "Block "
& Expanded_Name (Block'Tag)
& " is empty (contains no items)"
) );
end if;
Self (Item).Data :=
new Sequence'
( Length => Counter.Count - 1,
Caller => null,
State => 0,
Current => 1,
List => Counter.Data.Vector
( 2
.. Counter.Count
) );
Count := Data_Item_Offset (Get_Size (Item)) - 1;
end;
end if;
Add (This, Item, Count);
end;
end Enumerate;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Item : Data_Item
) is
begin
Check_Initialization_Stream (Item, Stream.all);
declare
This : Initialization_Stream'Class renames
Initialization_Stream'Class (Stream.all);
begin
Add (This, Item);
end;
end Enumerate;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Item : Data_Selector
) is
begin
Check_Initialization_Stream (Item, Stream.all);
declare
Selector : Data_Selector'Class renames
Self (Data_Selector'Class (Item)).all;
Count : Data_Item_Offset := 0;
This : Initialization_Stream'Class renames
Initialization_Stream'Class (Stream.all);
begin
if not Selector.Initialized then
Selector.Initialized := True;
declare
Counter : aliased Initialization_Stream;
begin
if This.Parent = null then
Counter.Parent := This.Shared'Access;
else
Counter.Parent := This.Parent;
end if;
Selector.Initialized := True;
Data_Selector'Class'Write (Counter'Access, Selector);
if Counter.Count <= 1 then
Raise_Exception
( Use_Error'Identity,
( "Selector "
& Expanded_Name (Data_Item'Class (Item)'Tag)
& " contains no alternatives"
) );
end if;
Selector.Alternatives :=
new Alternatives_List
( Natural (Counter.Count)
- 1
);
declare
This : Data_Item_Ptr;
List : Sequence_Array renames
Item.Alternatives.List;
begin
for Index in List'Range loop
This :=
Get
( Counter.Data,
Data_Item_Offset (Index) + 1
);
List (Index) :=
new Sequence'
( Length => 1,
Caller => null,
State => 0,
Current => 1,
List => (1 => This)
);
end loop;
end;
Count := Data_Item_Offset (Get_Size (Item)) - 1;
end;
end if;
Add (This, Item, Count);
end;
end Enumerate;
procedure Enumerate
( Stream : access Root_Stream_Type'Class;
Item : Shared_Data_Item
) is
begin
Check_Initialization_Stream (Item, Stream.all);
declare
This : Initialization_Stream'Class renames
Initialization_Stream'Class (Stream.all);
begin
if not Item.Initialized then
declare
Shared : Shared_Data_Item'Class renames
Self (Item).all;
begin
Shared.Initialized := True;
Shared.Previous := This.Shared;
This.Shared := Shared'Unchecked_Access;
end;
end if;
Add (This, Item);
end;
end Enumerate;
procedure Erase (Buffer : in out External_String_Buffer) is
This : Allocator_Data_Ptr := Buffer.Allocators;
Next : Allocator_Data_Ptr;
begin
while This /= null loop
Next := This.Previous;
This.Previous := null;
Freed (This.Allocator.all);
This := Next;
end loop;
Buffer.Length := 0;
Buffer.Count := 0;
Buffer.Allocators := null;
end Erase;
procedure External_Initialize
( Item : Data_Item'Class;
Shared : Shared_Data_Item_Ptr := null
) is
Stream : aliased Initialization_Stream;
begin
Stream.Shared := Shared;
Data_Item'Class'Write (Stream'Access, Item);
end External_Initialize;
procedure Feed
( Item : in out Shared_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;
procedure Feed
( Item : in out External_String_Buffer;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
) is
begin
Erase (Item); -- Erase the buffer
Feed (Shared_Data_Item (Item), Data, Pointer, Client, State);
end Feed;
procedure Feed
( Item : in out Data_Block;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
) is
begin
Call (Client, Pointer, Item.Data);
State := 0;
end Feed;
procedure Feed
( Item : in out Data_Null;
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;
procedure Feed
( Item : in out Data_Selector;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
) is
begin
Call (Client, Pointer, Item.Alternatives.List (Item.Current));
State := 0;
end Feed;
procedure Finalize (Client : in out State_Machine) is
begin
if Client.Data /= null then
while Client.Data.Caller /= null loop
Client.Data := Client.Data.Caller;
end loop;
Free (Client.Data);
end if;
Finalize (Connection (Client));
end Finalize;
procedure Finalize (Item : in out Data_Block) is
begin
Free (Item.Data);
end Finalize;
procedure Finalize (Item : in out Data_Selector) is
procedure Free is
new Ada.Unchecked_Deallocation
( Alternatives_List,
Alternatives_List_Ptr
);
begin
if Item.Alternatives /= null then
declare
List : Sequence_Array renames Item.Alternatives.List;
begin
for Index in List'Range loop
Free (List (Index));
end loop;
end;
Free (Item.Alternatives);
end if;
end Finalize;
procedure Finalize (Buffer : in out External_String_Buffer) is
begin
Erase (Buffer);
Buffer.Allocators := null;
Finalize (Shared_Data_Item (Buffer));
end Finalize;
procedure Freed (Item : in out Data_Item) is
begin
null;
end Freed;
package From_Block_Address is
new System.Address_To_Access_Conversions (Data_Block'Class);
package From_Item_Address is
new System.Address_To_Access_Conversions (Data_Item'Class);
package From_Selector_Address is
new System.Address_To_Access_Conversions (Data_Selector'Class);
package From_Shared_Item_Address is
new System.Address_To_Access_Conversions (Shared_Data_Item'Class);
function Get_Alternative (Item : Data_Selector) return Positive is
begin
return Item.Current;
end Get_Alternative;
function Get_Alternatives_Number (Item : Data_Selector)
return Positive is
begin
if not Item.Initialized or else Item.Alternatives = null then
Raise_Exception
( Use_Error'Identity,
( "Selector "
& Expanded_Name (Data_Item'Class (Item)'Tag)
& " was not properly initialized"
) );
end if;
return Positive (Item.Alternatives.Size);
end Get_Alternatives_Number;
function Get_Children
( Item : Data_Item
) return Data_Item_Ptr_Array is
begin
return (1..0 => null);
end Get_Children;
function Get_Children
( Item : Data_Block
) return Data_Item_Ptr_Array is
Length : Data_Item_Offset := 0;
begin
if not Item.Initialized or else Item.Data = null then
Raise_Exception
( Use_Error'Identity,
( "Block "
& Expanded_Name (Data_Item'Class (Item)'Tag)
& " was not properly initialized"
) );
end if;
return Item.Data.List;
end Get_Children;
function Get_Children
( Item : Data_Selector
) return Data_Item_Ptr_Array is
Length : Data_Item_Offset := 0;
begin
if not Item.Initialized or else Item.Alternatives = null then
Raise_Exception
( Use_Error'Identity,
( "Selector "
& Expanded_Name (Data_Item'Class (Item)'Tag)
& " was not properly initialized"
) );
end if;
for Index in Item.Alternatives.List'Range loop
Length := Length + Item.Alternatives.List (Index).List'Length;
end loop;
declare
Result : Data_Item_Ptr_Array (1..Length);
No : Data_Item_Address := 1;
begin
for Index in Item.Alternatives.List'Range loop
declare
Alternative : Data_Item_Ptr_Array renames
Item.Alternatives.List (Index).List;
begin
Result (No..No + Alternative'Length - 1) := Alternative;
No := No + Alternative'Length;
end;
end loop;
return Result;
end;
end Get_Children;
function Get_Length (Item : Data_Block) return Positive is
begin
if not Item.Initialized or else Item.Data = null then
Raise_Exception
( Use_Error'Identity,
( "Block "
& Expanded_Name (Data_Item'Class (Item)'Tag)
& " was not properly initialized"
) );
end if;
return Positive (Item.Data.Length);
end Get_Length;
function Get_Size (Item : Data_Block) return Natural is
begin
if not Item.Initialized or else Item.Data = null then
Raise_Exception
( Use_Error'Identity,
( "Block "
& Expanded_Name (Data_Item'Class (Item)'Tag)
& " was not properly initialized"
) );
end if;
declare
Result : Natural := 1;
List : Data_Item_Ptr_Array renames Item.Data.List;
begin
for Index in List'Range loop
Result := Result + Get_Size (List (Index).all);
end loop;
return Result;
end;
end Get_Size;
function Get_Size (Item : Data_Item) return Natural is
begin
return 1;
end Get_Size;
function Get_Size (Item : Data_Selector) return Natural is
begin
if not Item.Initialized or else Item.Alternatives = null then
Raise_Exception
( Use_Error'Identity,
( "Selector "
& Expanded_Name (Data_Item'Class (Item)'Tag)
& " was not properly initialized"
) );
end if;
declare
Result : Natural := 1;
Sequence : Sequence_Array renames Item.Alternatives.List;
begin
for Index in Sequence'Range loop
declare
List : Data_Item_Ptr_Array renames Sequence (Index).List;
begin
for Index in List'Range loop
Result := Result + Get_Size (List (Index).all);
end loop;
end;
end loop;
return Result;
end;
end Get_Size;
procedure Read
( Stream : in out Initialization_Stream;
Item : out Stream_Element_Array;
Last : out Stream_Element_Offset
) is
begin
Last := Item'Last;
end Read;
procedure Received
( Client : in out State_Machine;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset
) is
begin
Pointer := Data'First;
while Pointer <= Data'Last loop
Client.Start := Pointer;
Feed
( Client.Data.List (Client.Data.Current).all,
Data,
Pointer,
Client,
Client.State
);
Client.Fed :=
Client.Fed + Unsigned_64 (Pointer - Client.Start);
if Client.State = 0 then -- Done with this item
Client.Data.Current := Client.Data.Current + 1;
while Client.Data.Current > Client.Data.Length loop
if Client.Data.Caller = null then
Client.Data.Current := 1;
Process_Packet (State_Machine'Class (Client));
exit;
end if;
Client.State := Client.Data.State; -- Restore state
Client.Data := Client.Data.Caller;
if Client.State /= 0 then
End_Of_Subsequence
( Client.Data.List (Client.Data.Current).all,
Data,
Pointer,
Client,
Client.State
);
exit when Client.State /= 0;
end if;
Client.Data.Current := Client.Data.Current + 1;
end loop;
else
exit when Pointer > Data'Last; -- All data consumed
Raise_Exception
( Status_Error'Identity,
( "Unprocessed data left when after return from "
& Expanded_Name
( Client.Data.List
( Client.Data.Current
) .all'Tag
) ) );
end if;
end loop;
end Received;
function Self (Item : Data_Block'Class) return Data_Block_Ptr is
use From_Block_Address;
begin
return To_Pointer (Item'Address).all'Unchecked_Access;
end Self;
function Self (Item : Data_Item'Class) return Data_Item_Ptr is
use From_Item_Address;
begin
return To_Pointer (Item'Address).all'Unchecked_Access;
end Self;
function Self (Item : Data_Selector'Class)
return Data_Selector_Ptr is
use From_Selector_Address;
begin
return To_Pointer (Item'Address).all'Unchecked_Access;
end Self;
function Self (Item : Shared_Data_Item'Class)
return Shared_Data_Item_Ptr is
use From_Shared_Item_Address;
begin
return To_Pointer (Item'Address).all'Unchecked_Access;
end Self;
procedure Set_Alternative
( Item : in out Data_Selector;
Alternative : Positive
) is
begin
if Alternative > Get_Alternatives_Number (Item) then
Raise_Exception
( Constraint_Error'Identity,
( "Invalid alternative number of selector "
& Expanded_Name (Data_Item'Class (Item)'Tag)
) );
end if;
Item.Current := Alternative;
end Set_Alternative;
function Storage_Size
( Pool : Arena_Pool
) return Storage_Count is
begin
return Pool.Parent.Buffer'Size / System.Storage_Unit;
end Storage_Size;
function To_Integer (Value : Unsigned_8) return Integer_8 is
begin
if Value < 2**7 then
return Integer_8 (Value);
else
return -Integer_8 (not Value) - 1;
end if;
end To_Integer;
function To_Integer (Value : Unsigned_16) return Integer_16 is
begin
if Value < 2**15 then
return Integer_16 (Value);
else
return -Integer_16 (not Value) - 1;
end if;
end To_Integer;
function To_Integer (Value : Unsigned_32) return Integer_32 is
begin
if Value < 2**31 then
return Integer_32 (Value);
else
return -Integer_32 (not Value) - 1;
end if;
end To_Integer;
function To_Integer (Value : Unsigned_64) return Integer_64 is
begin
if Value < 2**63 then
return Integer_64 (Value);
else
return -Integer_64 (not Value) - 1;
end if;
end To_Integer;
function To_Unsigned (Value : Integer_8) return Unsigned_8 is
begin
if Value >= 0 then
return Unsigned_8 (Value);
else
return not Unsigned_8 (-(Value + 1));
end if;
end To_Unsigned;
function To_Unsigned (Value : Integer_16) return Unsigned_16 is
begin
if Value >= 0 then
return Unsigned_16 (Value);
else
return not Unsigned_16 (-(Value + 1));
end if;
end To_Unsigned;
function To_Unsigned (Value : Integer_32) return Unsigned_32 is
begin
if Value >= 0 then
return Unsigned_32 (Value);
else
return not Unsigned_32 (-(Value + 1));
end if;
end To_Unsigned;
function To_Unsigned (Value : Integer_64) return Unsigned_64 is
begin
if Value >= 0 then
return Unsigned_64 (Value);
else
return not Unsigned_64 (-(Value + 1));
end if;
end To_Unsigned;
procedure Write
( Stream : in out Initialization_Stream;
Item : Stream_Element_Array
) is
begin
null;
end Write;
end GNAT.Sockets.Connection_State_Machine;
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