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------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- G N A T . D E B U G _ U T I L I T I E S --
-- --
-- B o d y --
-- --
-- Copyright (C) 1997-2004 Ada Core Technologies, 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with System; use System;
with System.Storage_Elements; use System.Storage_Elements;
package body GNAT.Debug_Utilities is
H : constant array (0 .. 15) of Character := "0123456789ABCDEF";
-- Table of hex digits
-----------
-- Image --
-----------
-- Address case
function Image (A : Address) return Image_String is
S : Image_String;
P : Natural := Address_Image_Length - 1;
N : Integer_Address := To_Integer (A);
U : Natural := 0;
begin
S (S'Last) := '#';
while P > 3 loop
if U = 4 then
S (P) := '_';
P := P - 1;
U := 1;
else
U := U + 1;
end if;
S (P) := H (Integer (N mod 16));
P := P - 1;
N := N / 16;
end loop;
S (1 .. 3) := "16#";
return S;
end Image;
-----------
-- Image --
-----------
-- String case
function Image (S : String) return String is
W : String (1 .. 2 * S'Length + 2);
P : Positive := 1;
begin
W (1) := '"';
for J in S'Range loop
if S (J) = '"' then
P := P + 1;
W (P) := '"';
end if;
P := P + 1;
W (P) := S (J);
end loop;
P := P + 1;
W (P) := '"';
return W (1 .. P);
end Image;
-------------
-- Image_C --
-------------
function Image_C (A : Address) return Image_C_String is
S : Image_C_String;
N : Integer_Address := To_Integer (A);
begin
for P in reverse 3 .. S'Last loop
S (P) := H (Integer (N mod 16));
N := N / 16;
end loop;
S (1 .. 2) := "0x";
return S;
end Image_C;
-----------
-- Value --
-----------
function Value (S : String) return System.Address is
Base : Integer_Address := 10;
Res : Integer_Address := 0;
Last : Natural := S'Last;
C : Character;
N : Integer_Address;
begin
-- Skip final Ada 95 base character
if S (Last) = '#' or else S (Last) = ':' then
Last := Last - 1;
end if;
-- Loop through characters
for J in S'First .. Last loop
C := S (J);
-- C format hex constant
if C = 'x' then
if Res /= 0 then
raise Constraint_Error;
end if;
Base := 16;
-- Ada form based literal
elsif C = '#' or else C = ':' then
Base := Res;
Res := 0;
-- Ignore all underlines
elsif C = '_' then
null;
-- Otherwise must have digit
else
if C in '0' .. '9' then
N := Character'Pos (C) - Character'Pos ('0');
elsif C in 'A' .. 'F' then
N := Character'Pos (C) - (Character'Pos ('A') - 10);
elsif C in 'a' .. 'f' then
N := Character'Pos (C) - (Character'Pos ('a') - 10);
else
raise Constraint_Error;
end if;
if N >= Base then
raise Constraint_Error;
else
Res := Res * Base + N;
end if;
end if;
end loop;
return To_Address (Res);
end Value;
end GNAT.Debug_Utilities;
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