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--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--                 G N A T . D E B U G _ U T I L I T I E S                  --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--                     Copyright (C) 1995-2005, AdaCore                     --

--                                                                          --

-- 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,  51  Franklin  Street,  Fifth  Floor, --

-- Boston, MA 02110-1301, 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.      --

--                                                                          --

------------------------------------------------------------------------------

--  Debugging utilities

--  This package provides some useful utility subprograms for use in writing

--  routines that generate debugging output.

with System;

package GNAT.Debug_Utilities is

   pragma Pure;

   Address_64 : constant Boolean := Standard'Address_Size = 64;

   --  Set true if 64 bit addresses (assumes only 32 and 64 are possible)

   Address_Image_Length : constant := 13 + 10 * Boolean'Pos (Address_64);

   --  Length of string returned by Image function for an address

   subtype Image_String is String (1 .. Address_Image_Length);

   --  Subtype returned by Image function for an address

   Address_Image_C_Length : constant := 10 + 8 * Boolean'Pos (Address_64);

   --  Length of string returned by Image_C function

   subtype Image_C_String is String (1 .. Address_Image_C_Length);

   --  Subtype returned by Image_C function

   function Image (S : String) return String;

   --  Returns a string image of S, obtained by prepending and appending

   --  quote (") characters and doubling any quote characters in the string.

   --  The maximum length of the result is thus 2 ** S'Length + 2.

   function Image (A : System.Address) return Image_String;

   --  Returns a string of the form 16#hhhh_hhhh# for 32-bit addresses

   --  or 16#hhhh_hhhh_hhhh_hhhh# for 64-bit addresses. Hex characters

   --  are in upper case.

   function Image_C (A : System.Address) return Image_C_String;

   --  Returns a string of the form 0xhhhhhhhh for 32 bit addresses or

   --  0xhhhhhhhhhhhhhhhh for 64-bit addresses. Hex characters are in

   --  upper case.

   function Value (S : String) return System.Address;

   --  Given a valid integer literal in any form, including the form returned

   --  by the Image function in this package, yields the corresponding address.

   --  Note that this routine will handle any Ada integer format, and will

   --  also handle hex constants in C format (0xhh..hhh). Constraint_Error

   --  may be raised for obviously incorrect data, but the routine is fairly

   --  permissive, and in particular, all underscores in whatever position

   --  are simply ignored completely.

end GNAT.Debug_Utilities;