1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . A D D R E S S _ I M A G E --
10 -- Copyright (C) 1992,1993,1994,1995,1996 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 with Unchecked_Conversion;
37 function System.Address_Image (A : Address) return String is
39 Result : String (1 .. 2 * Address'Size / Storage_Unit);
41 type Byte is mod 2 ** 8;
45 constant array (Byte range 0 .. 15) of Character := "0123456789ABCDEF";
47 type Bytes is array (1 .. Address'Size / Storage_Unit) of Byte;
48 for Bytes'Size use Address'Size;
50 function To_Bytes is new Unchecked_Conversion (Address, Bytes);
52 Byte_Sequence : constant Bytes := To_Bytes (A);
54 LE : constant := Standard'Default_Bit_Order;
55 BE : constant := 1 - LE;
56 -- Set to 1/0 for True/False for Little-Endian/Big-Endian
58 Start : constant Natural := BE * (1) + LE * (Bytes'Length);
59 Incr : constant Integer := BE * (1) + LE * (-1);
60 -- Start and increment for accessing characters of address string
63 -- Scan address string
67 for N in Bytes'Range loop
68 Result (2 * N - 1) := Hexdigs (Byte_Sequence (Ptr) / 16);
69 Result (2 * N) := Hexdigs (Byte_Sequence (Ptr) mod 16);
75 end System.Address_Image;