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1 281 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT RUN-TIME 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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--                                 S p e c                                  --
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--                                                                          --
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--                     Copyright (C) 1995-2005, 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 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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--  Debugging utilities
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--  This package provides some useful utility subprograms for use in writing
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--  routines that generate debugging output.
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with System;
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package GNAT.Debug_Utilities is
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   pragma Pure;
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   Address_64 : constant Boolean := Standard'Address_Size = 64;
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   --  Set true if 64 bit addresses (assumes only 32 and 64 are possible)
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   Address_Image_Length : constant := 13 + 10 * Boolean'Pos (Address_64);
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   --  Length of string returned by Image function for an address
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   subtype Image_String is String (1 .. Address_Image_Length);
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   --  Subtype returned by Image function for an address
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   Address_Image_C_Length : constant := 10 + 8 * Boolean'Pos (Address_64);
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   --  Length of string returned by Image_C function
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   subtype Image_C_String is String (1 .. Address_Image_C_Length);
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   --  Subtype returned by Image_C function
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   function Image (S : String) return String;
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   --  Returns a string image of S, obtained by prepending and appending
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   --  quote (") characters and doubling any quote characters in the string.
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   --  The maximum length of the result is thus 2 ** S'Length + 2.
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   function Image (A : System.Address) return Image_String;
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   --  Returns a string of the form 16#hhhh_hhhh# for 32-bit addresses
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   --  or 16#hhhh_hhhh_hhhh_hhhh# for 64-bit addresses. Hex characters
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   --  are in upper case.
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   function Image_C (A : System.Address) return Image_C_String;
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   --  Returns a string of the form 0xhhhhhhhh for 32 bit addresses or
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   --  0xhhhhhhhhhhhhhhhh for 64-bit addresses. Hex characters are in
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   --  upper case.
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   function Value (S : String) return System.Address;
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   --  Given a valid integer literal in any form, including the form returned
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   --  by the Image function in this package, yields the corresponding address.
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   --  Note that this routine will handle any Ada integer format, and will
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   --  also handle hex constants in C format (0xhh..hhh). Constraint_Error
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   --  may be raised for obviously incorrect data, but the routine is fairly
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   --  permissive, and in particular, all underscores in whatever position
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   --  are simply ignored completely.
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end GNAT.Debug_Utilities;

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