------------------------------------------------------------------------------
--                                                                          --
--                         GNAT LIBRARY COMPONENTS                          --
--                                                                          --
--            G N A T . M O S T _ R E C E N T _ E X C E P T I O N           --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--                     Copyright (C) 2000-2020, AdaCore                     --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT 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/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Exceptions.Is_Null_Occurrence;
with System.Soft_Links;

package body GNAT.Most_Recent_Exception is

   ----------------
   -- Occurrence --
   ----------------

   function Occurrence return Ada.Exceptions.Exception_Occurrence is
      EOA : constant Ada.Exceptions.Exception_Occurrence_Access :=
              GNAT.Most_Recent_Exception.Occurrence_Access;

      use type Ada.Exceptions.Exception_Occurrence_Access;

   begin
      return Result : Ada.Exceptions.Exception_Occurrence do
         if EOA = null then
            Ada.Exceptions.Save_Occurrence
              (Target => Result,
               Source => Ada.Exceptions.Null_Occurrence);
         else
            Ada.Exceptions.Save_Occurrence
              (Target => Result,
               Source => EOA.all);
         end if;
      end return;
   end Occurrence;

   -----------------------
   -- Occurrence_Access --
   -----------------------

   function Occurrence_Access
     return Ada.Exceptions.Exception_Occurrence_Access
   is
      use Ada.Exceptions;

      EOA : constant Exception_Occurrence_Access :=
              System.Soft_Links.Get_Current_Excep.all;

   begin
      if EOA = null then
         return null;

      elsif Is_Null_Occurrence (EOA.all) then
         return null;

      else
         return EOA;
      end if;
   end Occurrence_Access;

end GNAT.Most_Recent_Exception;
