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+------------------------------------------------------------------------------
+-- --
+-- 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 --
+-- --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
+-- --
+-- 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.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 Ada.Unchecked_Conversion (Address, Bytes);
+
+ Byte_Sequence : constant Bytes := To_Bytes (A);
+
+ LE : constant := Standard'Default_Bit_Order;
+ BE : constant := 1 - LE;
+ -- Set to 1/0 for True/False for Little-Endian/Big-Endian
+
+ Start : constant Natural := BE * (1) + LE * (Bytes'Length);
+ Incr : constant Integer := BE * (1) + LE * (-1);
+ -- Start and increment for accessing characters of address string
+
+ Ptr : Natural;
+ -- Scan address string
+
+begin
+ Ptr := Start;
+ for N in Bytes'Range loop
+ Result (2 * N - 1) := Hexdigs (Byte_Sequence (Ptr) / 16);
+ Result (2 * N) := Hexdigs (Byte_Sequence (Ptr) mod 16);
+ Ptr := Ptr + Incr;
+ end loop;
+
+ return Result;
+
+end System.Address_Image;