------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2003-2014, 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. --
------------------------------------------------------------------------------
-- An ready-to-use implementation of the stream API where the stream content
-- is read from an on-disk file.
private with Ada.Strings.Unbounded;
private with Ada.Streams.Stream_IO;
package AWS.Resources.Streams.Disk is
type Stream_Type is new Streams.Stream_Type with private;
procedure Open
(File : out Stream_Type;
Name : String;
Form : String := "shared=no");
overriding function End_Of_File (Resource : Stream_Type) return Boolean;
overriding procedure Read
(Resource : in out Stream_Type;
Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset);
overriding function Size
(Resource : Stream_Type) return Stream_Element_Offset;
overriding function Name (Resource : Stream_Type) return String;
overriding procedure Reset (Resource : in out Stream_Type);
overriding procedure Set_Index
(Resource : in out Stream_Type;
To : Stream_Element_Offset);
overriding procedure Close (Resource : in out Stream_Type);
private
use Ada.Strings.Unbounded;
Buffer_Size : constant := 8_192;
type Stream_Type is new Streams.Stream_Type with record
File : Stream_IO.File_Type;
Stream : Stream_IO.Stream_Access;
-- Below are data for buffered access to the file
Buffer : Stream_Element_Array (1 .. Buffer_Size);
Current : Stream_Element_Offset := 1;
Last : Stream_Element_Offset := 0;
Name : Unbounded_String;
end record;
end AWS.Resources.Streams.Disk;