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 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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
;