---------------------------------------
-----------------------------------------
------------------------------------------------------------------------------
-- Cheddar is a GNU GPL real time scheduling analysis tool.
-- This program provides services to automatically check performances
-- of real time architectures.
--
-- Copyright (C) 2002-2010,  by Frank Singhoff, Alain Plantec, Jerome Legrand
--
-- The Cheddar project was started in 2002 by
-- the LISyC Team, University of Western Britanny.
--
-- Since 2008, Ellidiss technologies also contributes to the development of
-- Cheddar and provides industrial support.
--
-- This program 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 program 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 program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
--
--
-- Contact : cheddar@listes.univ-brest.fr
--
-----------------------------------------------------------------------------
-- Last update :
--    $Rev: 523 $
--    $Date: 2012-09-26 14:09:39 +0100 (Wed, 26 Sep 2012) $
--    $Author: fotsing $
------------------------------------------------------------------------------
------------------------------------------------------------------------------

with Version; use Version;

with Ada.IO_Exceptions; use Ada.IO_Exceptions;

with GNAT.Current_Exception; use GNAT.Current_Exception;

with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;

with unbounded_strings; use unbounded_strings;

with GNAT.Command_Line; use GNAT.Command_Line;

with GNAT.OS_Lib; use GNAT.OS_Lib;

with Text_IO; use Text_IO;

procedure Merge is

   procedure Usage is
   begin
      New_Line;
      Put_Line ("Usage : merge  infile");
      Put_Line ("   switch can be :");
      Put_Line ("            -t file to be merge on the top of the infile");
      Put_Line ("            -u get this help");
      New_Line;
   end Usage;

   Infile           : Unbounded_String;
   Top_File         : Unbounded_String;
   Into             : File_Type;
   Outto            : File_Type;
   Read_String      : String (1 .. 100000);
   Read_String_Size : Natural;

begin

   Copyright ("merge");

   -- Get arguments
   --
   loop
      case Getopt ("u t:") is
         when ASCII.NUL =>
            exit;

         when 'u' =>
            Usage;
            OS_Exit (0);

         when 't' =>
            Top_File := To_Unbounded_String (Parameter);

         when others =>
            Usage;
            OS_Exit (0);
      end case;
   end loop;

   loop
      declare
         S : constant String := Get_Argument (Do_Expansion => True);
      begin
         exit when S'Length = 0;
         Infile := Infile & S;
      end;
   end loop;

   if (Infile = empty_string) then
      Put_Line ("merge.adb : a file name is required");
      Usage;
      OS_Exit (0);
   end if;

   -- Copy the first file on the top
   --
   Create (Outto, Mode => Out_File, Name => "merge.txt");

   Open (Into, Mode => In_File, Name => To_String (Top_File));

   while not End_Of_File (Into) loop
      Get_Line (Into, Read_String, Read_String_Size);
      Put_Line (Outto, Read_String (1 .. Read_String_Size));
   end loop;

   Close (Into);
   Open (Into, Mode => In_File, Name => To_String (Infile));

   while not End_Of_File (Into) loop
      Get_Line (Into, Read_String, Read_String_Size);
      Put_Line (Outto, Read_String (1 .. Read_String_Size));
   end loop;

   Close (Into);
   Close (Outto);

   -- Update the infile with the text to merge
   --
   Open (Into, Mode => In_File, Name => "merge.txt");
   Create (Outto, Mode => Out_File, Name => To_String (Infile));

   while not End_Of_File (Into) loop
      Get_Line (Into, Read_String, Read_String_Size);
      Put_Line (Outto, Read_String (1 .. Read_String_Size));
   end loop;

   Close (Into);
   Close (Outto);

exception
   when Invalid_Switch =>
      begin
         Put_Line ("merge.adb : invalid Switch " & Full_Switch);
         Usage;
      end;
   when Invalid_Parameter =>
      Put_Line ("merge.adb : missing parameter for switch " & Full_Switch);
   when Ada.IO_Exceptions.Name_Error =>
      Put_Line ("merge.adb : Can not access file, Name_Error");
   when Ada.IO_Exceptions.Status_Error =>
      Put_Line ("merge.adb : Can not access file, Status_Error");
   when Ada.IO_Exceptions.Mode_Error =>
      Put_Line ("merge.adb : Can not access file, Mode_Error");
   when Ada.IO_Exceptions.Use_Error =>
      Put_Line ("merge.adb : Can not access file, Use_Error");
   when Ada.IO_Exceptions.Device_Error =>
      Put_Line ("merge.adb : Can not access file, Device_Error");
   when Ada.IO_Exceptions.End_Error =>
      Put_Line ("merge.adb : Can not access file, End_Error");
   when Ada.IO_Exceptions.Data_Error =>
      Put_Line ("merge.adb : Can not access file, Data_Error");
   when Ada.IO_Exceptions.Layout_Error =>
      Put_Line ("merge.adb : Can not access file, Layout_Error");
   when others =>
      Put_Line ("Exception name    : " & Exception_Name);
      Put_Line ("Exception message : " & Exception_Message);
end Merge;