File : src/aws-resources-streams-memory-zlib.ads
------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2003 --
-- ACT-Europe --
-- --
-- Authors: Dmitriy Anisimkov - Pascal Obry --
-- --
-- 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. --
------------------------------------------------------------------------------
-- $RCSfile: aws-resources-streams-memory-zlib.ads,v $
-- $Revision: 1.10 $
-- $Date: 2003/10/08 11:16:40 $
-- $Author: anisimko $
-- This API is used as for standard memory stream (see parent package), the
-- only difference is that the stream is compressed.
with ZLib;
package AWS.Resources.Streams.Memory.ZLib is
package ZL renames Standard.ZLib;
type Stream_Type is new Memory.Stream_Type with private;
subtype Window_Bits_Type is ZL.Window_Bits_Type;
subtype Header_Type is ZL.Header_Type;
subtype Compression_Level is ZL.Compression_Level;
subtype Strategy_Type is ZL.Strategy_Type;
subtype Compression_Method is ZL.Compression_Method;
subtype Memory_Level_Type is ZL.Memory_Level_Type;
Default_Compression : constant Compression_Level := ZL.Default_Compression;
procedure Deflate_Initialize
(Resource : in out Stream_Type;
Level : in Compression_Level := ZL.Default_Compression;
Strategy : in Strategy_Type := ZL.Default_Strategy;
Method : in Compression_Method := ZL.Deflated;
Window_Bits : in Window_Bits_Type := ZL.Default_Window_Bits;
Memory_Level : in Memory_Level_Type := ZL.Default_Memory_Level;
Header : in Header_Type := ZL.Default);
pragma Inline (Deflate_Initialize);
-- Initialize the compression
procedure Inflate_Initialize
(Resource : in out Stream_Type;
Window_Bits : in Window_Bits_Type := ZL.Default_Window_Bits;
Header : in Header_Type := ZL.Default);
pragma Inline (Inflate_Initialize);
-- Initialize the decompression
procedure Append
(Resource : in out Stream_Type;
Buffer : in Stream_Element_Array);
-- Compress and Append Buffer into the memory stream
procedure Read
(Resource : in out Stream_Type;
Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset);
-- Returns a chunck of data in Buffer, Last point to the last element
-- returned in Buffer.
function Size (Resource : in Stream_Type) return Stream_Element_Offset;
-- Returns the number of bytes in the memory stream
procedure Close (Resource : in out Stream_Type);
-- Close the ZLib stream, release all memory associated with the Resource
-- object.
private
type Stream_Access is access all Stream_Type;
type Stream_Type is new Memory.Stream_Type with record
Self : Stream_Access := Stream_Type'Unchecked_Access;
-- We need it for auto flush in the Size routine call
Filter : ZL.Filter_Type;
Flushed : Boolean;
end record;
end AWS.Resources.Streams.Memory.ZLib;