75 lines
3.6 KiB
Ada
75 lines
3.6 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S Y S T E M . A D D R E S S _ I M A G E --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992,1993,1994,1995,1996 Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Unchecked_Conversion;
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function System.Address_Image (A : Address) return String is
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Result : String (1 .. 2 * Address'Size / Storage_Unit);
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type Byte is mod 2 ** 8;
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for Byte'Size use 8;
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Hexdigs :
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constant array (Byte range 0 .. 15) of Character := "0123456789ABCDEF";
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type Bytes is array (1 .. Address'Size / Storage_Unit) of Byte;
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for Bytes'Size use Address'Size;
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function To_Bytes is new Unchecked_Conversion (Address, Bytes);
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Byte_Sequence : constant Bytes := To_Bytes (A);
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LE : constant := Standard'Default_Bit_Order;
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BE : constant := 1 - LE;
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-- Set to 1/0 for True/False for Little-Endian/Big-Endian
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Start : constant Natural := BE * (1) + LE * (Bytes'Length);
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Incr : constant Integer := BE * (1) + LE * (-1);
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-- Start and increment for accessing characters of address string
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Ptr : Natural;
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-- Scan address string
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begin
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Ptr := Start;
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for N in Bytes'Range loop
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Result (2 * N - 1) := Hexdigs (Byte_Sequence (Ptr) / 16);
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Result (2 * N) := Hexdigs (Byte_Sequence (Ptr) mod 16);
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Ptr := Ptr + Incr;
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end loop;
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return Result;
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end System.Address_Image;
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