------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- Cheddar is a GNU GPL real-time scheduling analysis tool.
-- This program provides services to automatically check schedulability and
-- other performance criteria of real-time architecture models.
--
-- Copyright (C) 2002-2020, Frank Singhoff, Alain Plantec, Jerome Legrand,
--                          Hai Nam Tran, Stephane Rubini
--
-- The Cheddar project was started in 2002 by 
-- Frank Singhoff, Lab-STICC UMR 6285, Université de Bretagne Occidentale
-- 
-- Cheddar has been published in the "Agence de Protection des Programmes/France" in 2008. 
-- Since 2008, Ellidiss technologies also contributes to the development of 
-- Cheddar and provides industrial support.
--
-- The full list of contributors and sponsors can be found in AUTHORS.txt and SPONSORS.txt
--
-- 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 : 
--    $Rev$
--    $Date$
--    $Author: singhoff $
------------------------------------------------------------------------------
------------------------------------------------------------------------------

package body Qs_Tools is

   function Get_Rand_Parameter
     (Min  : in Natural;
      Max  : in Natural;
      Seed : in Generator)
      return Natural
   is
      Aux : Double;
      Res : Natural;

   begin
      Aux := Double (Random (Seed)) * (Double (Max) - Double (Min)) +
             Double (Min);
      Res := Natural (Aux);

      if (Res < Min) or (Res > Max) then
         raise Constraint_Error;
      end if;

      return Res;
   end Get_Rand_Parameter;

   function Get_Rand_Parameter
     (Min  : in Double;
      Max  : in Double;
      Seed : in Generator)
      return Double
   is
      Res : Double := 0.0;

   begin
      Res := Double (Random (Seed)) * (Max - Min) + Min;

      if (Res < Min) or (Res > Max) then
         raise Constraint_Error;
      end if;

      return Res;
   end Get_Rand_Parameter;

   function Get_Exponential_Time
     (Mtbe : in Double;
      Seed : in Generator)
      return Double
   is
      Result : Double;
   begin

      Result := -Mtbe * Log (Double (Random (Seed)));

      return (Result);
   end Get_Exponential_Time;

end Qs_Tools;