File : aws-resources.adb


------------------------------------------------------------------------------

--                              Ada Web Server                              --

--                                                                          --

--                            Copyright (C) 2002                            --

--                                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.adb,v 1.1 2003/10/05 19:59:58 Jano Exp $


with Ada.Unchecked_Deallocation;

with AWS.Resources.Files;
with AWS.Resources.Embedded;

package body AWS.Resources is

   use Ada;

   procedure Free is
      new Ada.Unchecked_Deallocation (Resources.File_Tagged'Class, File_Type);

   -----------

   -- Close --

   -----------


   procedure Close (Resource : in out File_Type) is
   begin
      Close (Resource.all);
      Free (Resource);
   end Close;

   -----------------

   -- End_Of_File --

   -----------------


   function End_Of_File (Resource : in File_Type) return Boolean is
   begin
      return End_Of_File (Resource.all);
   end End_Of_File;

   ---------------

   -- File_Size --

   ---------------


   function File_Size
     (Name : in String)
      return Ada.Streams.Stream_Element_Offset is
   begin
      if Resources.Embedded.Exists (Name) then
         return Resources.Embedded.File_Size (Name);
      else
         return Resources.Files.File_Size (Name);
      end if;
   end File_Size;

   --------------------

   -- File_Timestamp --

   --------------------


   function File_Timestamp
     (Name : in String)
      return Ada.Calendar.Time is
   begin
      if Resources.Embedded.Exists (Name) then
         return Resources.Embedded.File_Timestamp (Name);
      else
         return Resources.Files.File_Timestamp (Name);
      end if;
   end File_Timestamp;

   --------------

   -- Get_Line --

   --------------


   procedure Get_Line
     (Resource : in out File_Type;
      Buffer   :    out String;
      Last     :    out Natural)
   is
      Byte     : Stream_Element_Array (1 .. 1);
      Last_Ind : Stream_Element_Offset;
   begin
      Last         := 0;
      Resource.LFT := False;

      for I in Buffer'Range loop

         Read (Resource.all, Byte, Last_Ind);

         exit when Last_Ind < Byte'Last;

         Buffer (I) := Character'Val (Byte (1));

         --  Check for end of line


         if Buffer (I) = ASCII.LF then
            --  This is LF

            if I > Buffer'First
              and then Buffer (I - 1) = ASCII.CR
            then
               --  And previous char was a CR, skip it

               Last := Last - 1;
            end if;

            Resource.LFT := True;
            exit;
         end if;

         Last := Last + 1;
      end loop;
   end Get_Line;

   ---------------------

   -- Is_Regular_File --

   ---------------------


   function Is_Regular_File
     (Name : in String)
      return Boolean is
   begin
      if Resources.Embedded.Exists (Name) then
         return Resources.Embedded.Is_Regular_File (Name);
      else
         return Resources.Files.Is_Regular_File (Name);
      end if;
   end Is_Regular_File;

   -------------------

   -- LF_Terminated --

   -------------------


   function LF_Terminated (Resource : in File_Type) return Boolean is
   begin
      return Resource.all.LFT;
   end LF_Terminated;

   ----------

   -- Open --

   ----------


   procedure Open
     (File :    out File_Type;
      Name : in     String;
      Form : in     String    := "") is
   begin
      --  Try to open the file in memory, if not found open the file on disk.

      Resources.Embedded.Open (File, Name, Form);

      if File = null then
         Resources.Files.Open (File, Name, Form);
      end if;
   end Open;

   ----------

   -- Read --

   ----------


   procedure Read
     (Resource : in out File_Type;
      Buffer   :    out Stream_Element_Array;
      Last     :    out Stream_Element_Offset) is
   begin
      Read (Resource.all, Buffer, Last);
   end Read;

end AWS.Resources;