------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                  S Y S T E M . A D D R E S S _ I M A G E                 --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--                            $Revision: 1.4 $                              --
--                                                                          --
--           Copyright (c) 1992,1993,1994 NYU, All Rights Reserved          --
--                                                                          --
-- The GNAT library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU Library General Public License as published by --
-- the Free Software  Foundation; either version 2, or (at your option) any --
-- later version.  The GNAT 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 --
-- Library  General  Public  License for  more  details.  You  should  have --
-- received  a copy of the GNU  Library  General Public License  along with --
-- the GNAT library;  see the file  COPYING.LIB.  If not, write to the Free --
-- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.        --
--                                                                          --
------------------------------------------------------------------------------

with Unchecked_Conversion;

function System.Address_Image (A : Address) return String is

   Result  : String (1 .. 2 * Address'Size / Storage_Unit);

   type Byte is mod 2 ** 8;
   for Byte'Size use 8;

   Hexdigs :
     constant array (Byte range 0 .. 15) of Character := "0123456789ABCDEF";

   type Bytes is array (1 .. Address'Size / Storage_Unit) of Byte;
   for Bytes'Size use Address'Size;

   function To_Bytes is new Unchecked_Conversion (Address, Bytes);

   Byte_Sequence : constant Bytes := To_Bytes (A);

begin
   for N in Bytes'Range loop
      Result (2 * N - 1) := Hexdigs (Byte_Sequence (N) / 16);
      Result (2 * N)     := Hexdigs (Byte_Sequence (N) mod 16);
   end loop;

   return Result;

end System.Address_Image;
