/usr/share/ada/adainclude/aws/aws-resources-streams-zlib.adb is in libaws3.3.2-dev 3.3.2-2.
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-- Ada Web Server --
-- --
-- Copyright (C) 2003-2013, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- 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. --
------------------------------------------------------------------------------
pragma Ada_2012;
package body AWS.Resources.Streams.ZLib is
-----------
-- Close --
-----------
overriding procedure Close (Resource : in out Stream_Type) is
begin
if Resource.Source /= null then
Close (Resource.Source);
ZL.Close (Resource.Filter, Ignore_Error => True);
end if;
end Close;
--------------------
-- Deflate_Create --
--------------------
function Deflate_Create
(Source : Streams.Stream_Access;
Level : Compression_Level := ZL.Default_Compression;
Strategy : Strategy_Type := ZL.Default_Strategy;
Method : Compression_Method := ZL.Deflated;
Window_Bits : Window_Bits_Type := ZL.Default_Window_Bits;
Memory_Level : Memory_Level_Type := ZL.Default_Memory_Level;
Header : Header_Type := ZL.Default)
return Stream_Access
is
Result : constant Streams.Stream_Access := new Stream_Type;
begin
Deflate_Initialize
(Stream_Type (Result.all), Source, Level, Strategy, Method,
Window_Bits, Memory_Level, Header);
return Result;
end Deflate_Create;
------------------------
-- Deflate_Initialize --
------------------------
procedure Deflate_Initialize
(Resource : in out Stream_Type;
Source : Streams.Stream_Access;
Level : Compression_Level := ZL.Default_Compression;
Strategy : Strategy_Type := ZL.Default_Strategy;
Method : Compression_Method := ZL.Deflated;
Window_Bits : Window_Bits_Type := ZL.Default_Window_Bits;
Memory_Level : Memory_Level_Type := ZL.Default_Memory_Level;
Header : Header_Type := ZL.Default) is
begin
Create (Resource.Source, Source);
Resource.End_Of_File := False;
Resource.Rest_First := Resource.Buffer'Last + 1;
Resource.Rest_Last := Resource.Buffer'Last;
ZL.Deflate_Init
(Resource.Filter, Level, Strategy, Method,
Window_Bits, Memory_Level, Header);
end Deflate_Initialize;
-----------------
-- End_Of_File --
-----------------
overriding function End_Of_File
(Resource : Stream_Type) return Boolean is
begin
-- We could not use return End_Of_File (Resource.Source);
-- because end of source file would be reached earlier then
-- end of file of the encoded stream.
return Resource.End_Of_File;
end End_Of_File;
--------------------
-- Inflate_Create --
--------------------
function Inflate_Create
(Source : Streams.Stream_Access;
Window_Bits : Window_Bits_Type := ZL.Default_Window_Bits;
Header : Header_Type := ZL.Default)
return Stream_Access
is
Result : constant Streams.Stream_Access := new Stream_Type;
begin
Inflate_Initialize
(Stream_Type (Result.all), Source, Window_Bits, Header);
return Result;
end Inflate_Create;
------------------------
-- Inflate_Initialize --
------------------------
procedure Inflate_Initialize
(Resource : in out Stream_Type;
Source : Streams.Stream_Access;
Window_Bits : Window_Bits_Type := ZL.Default_Window_Bits;
Header : Header_Type := ZL.Default) is
begin
Create (Resource.Source, Source);
Resource.End_Of_File := False;
Resource.Rest_First := Resource.Buffer'Last + 1;
Resource.Rest_Last := Resource.Buffer'Last;
ZL.Inflate_Init (Resource.Filter, Window_Bits, Header);
end Inflate_Initialize;
----------
-- Read --
----------
overriding procedure Read
(Resource : in out Stream_Type;
Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset)
is
procedure Get
(Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset)
with Inline;
-- Generic parameter for read source data
---------
-- Get --
---------
procedure Get
(Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset) is
begin
Read (Resource.Source, Buffer, Last);
end Get;
procedure Read_Encoded is new ZL.Read
(Read => Get,
Buffer => Resource.Buffer,
Rest_First => Resource.Rest_First,
Rest_Last => Resource.Rest_Last);
begin
Read_Encoded (Resource.Filter, Buffer, Last);
Resource.End_Of_File := Last < Buffer'Last;
end Read;
-----------
-- Reset --
-----------
overriding procedure Reset (Resource : in out Stream_Type) is
begin
Reset (Resource.Source);
end Reset;
---------------
-- Set_Index --
---------------
overriding procedure Set_Index
(Resource : in out Stream_Type;
To : Stream_Element_Offset) is
begin
Set_Index (Resource.Source, To);
end Set_Index;
end AWS.Resources.Streams.ZLib;
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