189 lines
5.6 KiB
Ada
189 lines
5.6 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT LIBRARY COMPONENTS --
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-- --
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-- G N A T . D E B U G _ U T I L I T I E S --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1997-2010, AdaCore --
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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 3, 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. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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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 System; use System;
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with System.Storage_Elements; use System.Storage_Elements;
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package body GNAT.Debug_Utilities is
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H : constant array (0 .. 15) of Character := "0123456789ABCDEF";
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-- Table of hex digits
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-----------
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-- Image --
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-----------
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-- Address case
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function Image (A : Address) return Image_String is
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S : Image_String;
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P : Natural;
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N : Integer_Address;
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U : Natural := 0;
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begin
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S (S'Last) := '#';
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P := Address_Image_Length - 1;
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N := To_Integer (A);
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while P > 3 loop
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if U = 4 then
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S (P) := '_';
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P := P - 1;
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U := 1;
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else
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U := U + 1;
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end if;
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S (P) := H (Integer (N mod 16));
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P := P - 1;
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N := N / 16;
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end loop;
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S (1 .. 3) := "16#";
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return S;
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end Image;
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-----------
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-- Image --
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-----------
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-- String case
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function Image (S : String) return String is
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W : String (1 .. 2 * S'Length + 2);
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P : Positive := 1;
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begin
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W (1) := '"';
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for J in S'Range loop
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if S (J) = '"' then
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P := P + 1;
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W (P) := '"';
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end if;
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P := P + 1;
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W (P) := S (J);
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end loop;
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P := P + 1;
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W (P) := '"';
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return W (1 .. P);
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end Image;
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-------------
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-- Image_C --
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-------------
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function Image_C (A : Address) return Image_C_String is
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S : Image_C_String;
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N : Integer_Address := To_Integer (A);
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begin
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for P in reverse 3 .. S'Last loop
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S (P) := H (Integer (N mod 16));
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N := N / 16;
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end loop;
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S (1 .. 2) := "0x";
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return S;
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end Image_C;
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-----------
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-- Value --
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-----------
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function Value (S : String) return System.Address is
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Base : Integer_Address := 10;
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Res : Integer_Address := 0;
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Last : Natural := S'Last;
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C : Character;
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N : Integer_Address;
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begin
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-- Skip final Ada 95 base character
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if S (Last) = '#' or else S (Last) = ':' then
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Last := Last - 1;
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end if;
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-- Loop through characters
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for J in S'First .. Last loop
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C := S (J);
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-- C format hex constant
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if C = 'x' then
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if Res /= 0 then
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raise Constraint_Error;
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end if;
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Base := 16;
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-- Ada form based literal
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elsif C = '#' or else C = ':' then
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Base := Res;
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Res := 0;
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-- Ignore all underlines
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elsif C = '_' then
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null;
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-- Otherwise must have digit
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else
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if C in '0' .. '9' then
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N := Character'Pos (C) - Character'Pos ('0');
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elsif C in 'A' .. 'F' then
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N := Character'Pos (C) - (Character'Pos ('A') - 10);
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elsif C in 'a' .. 'f' then
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N := Character'Pos (C) - (Character'Pos ('a') - 10);
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else
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raise Constraint_Error;
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end if;
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if N >= Base then
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raise Constraint_Error;
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else
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Res := Res * Base + N;
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end if;
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end if;
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end loop;
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return To_Address (Res);
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end Value;
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end GNAT.Debug_Utilities;
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