File : src/aws-resources-embedded.adb
------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2002-2003 --
-- 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. --
------------------------------------------------------------------------------
-- $Id: aws-resources-embedded.adb,v 1.8 2003/07/03 16:58:53 obry Exp $
with Table_Of_Strings_And_Static_Values_G;
package body AWS.Resources.Embedded is
type Node is record
File_Buffer : Buffer_Access;
File_Time : Calendar.Time;
end record;
package Res_Files is new Table_Of_Strings_And_Static_Values_G
(Character, String, "<", "=", Node);
Files_Table : Res_Files.Table_Type;
Empty_Buffer : aliased constant Ada.Streams.Stream_Element_Array
:= (1 .. 0 => 0);
-----------
-- Close --
-----------
procedure Close (Resource : in out File_Tagged) is
pragma Unreferenced (Resource);
begin
null;
end Close;
------------
-- Create --
------------
procedure Create
(File : out File_Type;
Buffer : in Buffer_Access) is
begin
File := new File_Tagged;
if Buffer = null then
File_Tagged (File.all).Buffer := Empty_Buffer'Access;
else
File_Tagged (File.all).Buffer := Buffer;
end if;
File_Tagged (File.all).K := Buffer'First;
end Create;
-----------------
-- End_Of_File --
-----------------
function End_Of_File (Resource : in File_Tagged) return Boolean is
begin
return Resource.K > Resource.Buffer'Last;
end End_Of_File;
------------
-- Exists --
------------
function Exists (Name : in String) return Boolean is
begin
return Res_Files.Is_Present (Files_Table, Name);
end Exists;
---------------
-- File_Size --
---------------
function File_Size
(Name : in String)
return Ada.Streams.Stream_Element_Offset is
begin
if Res_Files.Is_Present (Files_Table, Name) then
return Res_Files.Value (Files_Table, Name).File_Buffer'Length;
else
raise Resource_Error;
end if;
end File_Size;
--------------------
-- File_Timestamp --
--------------------
function File_Timestamp (Name : in String) return Ada.Calendar.Time is
begin
if Res_Files.Is_Present (Files_Table, Name) then
return Res_Files.Value (Files_Table, Name).File_Time;
else
raise Resource_Error;
end if;
end File_Timestamp;
---------------------
-- Is_Regular_File --
---------------------
function Is_Regular_File (Name : in String) return Boolean is
begin
return Exists (Name);
end Is_Regular_File;
----------
-- Open --
----------
procedure Open
(File : out File_Type;
Name : in String;
Form : in String := "")
is
pragma Unreferenced (Form);
N : Node;
begin
if Res_Files.Is_Present (Files_Table, Name) then
N := Res_Files.Value (Files_Table, Name);
File := new File_Tagged;
File_Tagged (File.all).Buffer := N.File_Buffer;
File_Tagged (File.all).K := N.File_Buffer'First;
else
File := null;
end if;
end Open;
----------
-- Read --
----------
procedure Read
(Resource : in out File_Tagged;
Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset)
is
K : Stream_Element_Offset renames Resource.K;
Size : Stream_Element_Offset; -- Number of byte remaining in buffer
begin
if K > Resource.Buffer'Last then
Last := 0;
else
Size := Resource.Buffer'Length - (K - Resource.Buffer'First);
if Buffer'Length <= Size then
Buffer := Resource.Buffer (K .. K + Buffer'Length - 1);
Last := Buffer'Last;
K := K + Buffer'Length;
else
Last := Buffer'First + Size - 1;
Buffer (Buffer'First .. Last)
:= Resource.Buffer (K .. Resource.Buffer'Last);
K := Resource.Buffer'Last + 1;
end if;
end if;
Resource.K := K;
end Read;
--------------
-- Register --
--------------
procedure Register
(Name : in String;
Content : in Buffer_Access;
File_Time : in Calendar.Time) is
begin
Res_Files.Insert (Files_Table, Name, (Content, File_Time));
end Register;
----------
-- Size --
----------
function Size (Resource : in File_Tagged) return Stream_Element_Offset is
begin
return Resource.Buffer'Length;
end Size;
end AWS.Resources.Embedded;