Chris@43: ----------------------------------------------------------------
Chris@43: --  ZLib for Ada thick binding.                               --
Chris@43: --                                                            --
Chris@43: --  Copyright (C) 2002-2003 Dmitriy Anisimkov                 --
Chris@43: --                                                            --
Chris@43: --  Open source license information is in the zlib.ads file.  --
Chris@43: ----------------------------------------------------------------
Chris@43: --  Continuous test for ZLib multithreading. If the test would fail
Chris@43: --  we should provide thread safe allocation routines for the Z_Stream.
Chris@43: --
Chris@43: --  $Id: mtest.adb,v 1.4 2004/07/23 07:49:54 vagul Exp $
Chris@43: 
Chris@43: with ZLib;
Chris@43: with Ada.Streams;
Chris@43: with Ada.Numerics.Discrete_Random;
Chris@43: with Ada.Text_IO;
Chris@43: with Ada.Exceptions;
Chris@43: with Ada.Task_Identification;
Chris@43: 
Chris@43: procedure MTest is
Chris@43:    use Ada.Streams;
Chris@43:    use ZLib;
Chris@43: 
Chris@43:    Stop : Boolean := False;
Chris@43: 
Chris@43:    pragma Atomic (Stop);
Chris@43: 
Chris@43:    subtype Visible_Symbols is Stream_Element range 16#20# .. 16#7E#;
Chris@43: 
Chris@43:    package Random_Elements is
Chris@43:       new Ada.Numerics.Discrete_Random (Visible_Symbols);
Chris@43: 
Chris@43:    task type Test_Task;
Chris@43: 
Chris@43:    task body Test_Task is
Chris@43:       Buffer : Stream_Element_Array (1 .. 100_000);
Chris@43:       Gen : Random_Elements.Generator;
Chris@43: 
Chris@43:       Buffer_First  : Stream_Element_Offset;
Chris@43:       Compare_First : Stream_Element_Offset;
Chris@43: 
Chris@43:       Deflate : Filter_Type;
Chris@43:       Inflate : Filter_Type;
Chris@43: 
Chris@43:       procedure Further (Item : in Stream_Element_Array);
Chris@43: 
Chris@43:       procedure Read_Buffer
Chris@43:         (Item : out Ada.Streams.Stream_Element_Array;
Chris@43:          Last : out Ada.Streams.Stream_Element_Offset);
Chris@43: 
Chris@43:       -------------
Chris@43:       -- Further --
Chris@43:       -------------
Chris@43: 
Chris@43:       procedure Further (Item : in Stream_Element_Array) is
Chris@43: 
Chris@43:          procedure Compare (Item : in Stream_Element_Array);
Chris@43: 
Chris@43:          -------------
Chris@43:          -- Compare --
Chris@43:          -------------
Chris@43: 
Chris@43:          procedure Compare (Item : in Stream_Element_Array) is
Chris@43:             Next_First : Stream_Element_Offset := Compare_First + Item'Length;
Chris@43:          begin
Chris@43:             if Buffer (Compare_First .. Next_First - 1) /= Item then
Chris@43:                raise Program_Error;
Chris@43:             end if;
Chris@43: 
Chris@43:             Compare_First := Next_First;
Chris@43:          end Compare;
Chris@43: 
Chris@43:          procedure Compare_Write is new ZLib.Write (Write => Compare);
Chris@43:       begin
Chris@43:          Compare_Write (Inflate, Item, No_Flush);
Chris@43:       end Further;
Chris@43: 
Chris@43:       -----------------
Chris@43:       -- Read_Buffer --
Chris@43:       -----------------
Chris@43: 
Chris@43:       procedure Read_Buffer
Chris@43:         (Item : out Ada.Streams.Stream_Element_Array;
Chris@43:          Last : out Ada.Streams.Stream_Element_Offset)
Chris@43:       is
Chris@43:          Buff_Diff   : Stream_Element_Offset := Buffer'Last - Buffer_First;
Chris@43:          Next_First : Stream_Element_Offset;
Chris@43:       begin
Chris@43:          if Item'Length <= Buff_Diff then
Chris@43:             Last := Item'Last;
Chris@43: 
Chris@43:             Next_First := Buffer_First + Item'Length;
Chris@43: 
Chris@43:             Item := Buffer (Buffer_First .. Next_First - 1);
Chris@43: 
Chris@43:             Buffer_First := Next_First;
Chris@43:          else
Chris@43:             Last := Item'First + Buff_Diff;
Chris@43:             Item (Item'First .. Last) := Buffer (Buffer_First .. Buffer'Last);
Chris@43:             Buffer_First := Buffer'Last + 1;
Chris@43:          end if;
Chris@43:       end Read_Buffer;
Chris@43: 
Chris@43:       procedure Translate is new Generic_Translate
Chris@43:                                    (Data_In  => Read_Buffer,
Chris@43:                                     Data_Out => Further);
Chris@43: 
Chris@43:    begin
Chris@43:       Random_Elements.Reset (Gen);
Chris@43: 
Chris@43:       Buffer := (others => 20);
Chris@43: 
Chris@43:       Main : loop
Chris@43:          for J in Buffer'Range loop
Chris@43:             Buffer (J) := Random_Elements.Random (Gen);
Chris@43: 
Chris@43:             Deflate_Init (Deflate);
Chris@43:             Inflate_Init (Inflate);
Chris@43: 
Chris@43:             Buffer_First  := Buffer'First;
Chris@43:             Compare_First := Buffer'First;
Chris@43: 
Chris@43:             Translate (Deflate);
Chris@43: 
Chris@43:             if Compare_First /= Buffer'Last + 1 then
Chris@43:                raise Program_Error;
Chris@43:             end if;
Chris@43: 
Chris@43:             Ada.Text_IO.Put_Line
Chris@43:               (Ada.Task_Identification.Image
Chris@43:                  (Ada.Task_Identification.Current_Task)
Chris@43:                & Stream_Element_Offset'Image (J)
Chris@43:                & ZLib.Count'Image (Total_Out (Deflate)));
Chris@43: 
Chris@43:             Close (Deflate);
Chris@43:             Close (Inflate);
Chris@43: 
Chris@43:             exit Main when Stop;
Chris@43:          end loop;
Chris@43:       end loop Main;
Chris@43:    exception
Chris@43:       when E : others =>
Chris@43:          Ada.Text_IO.Put_Line (Ada.Exceptions.Exception_Information (E));
Chris@43:          Stop := True;
Chris@43:    end Test_Task;
Chris@43: 
Chris@43:    Test : array (1 .. 4) of Test_Task;
Chris@43: 
Chris@43:    pragma Unreferenced (Test);
Chris@43: 
Chris@43:    Dummy : Character;
Chris@43: 
Chris@43: begin
Chris@43:    Ada.Text_IO.Get_Immediate (Dummy);
Chris@43:    Stop := True;
Chris@43: end MTest;