1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
10 -- Copyright (C) 2002 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 package body Gnatvsn is
37 -- Import the string constant defined in the (language-independent)
38 -- source file version.c.
40 -- The size is a lie; we have no way of writing the truth (the size
41 -- is variable and depends on the actual text of the constant).
43 -- FIXME: It should be possible to declare this to be a constant, but
44 -- that is rejected by the compiler ("invalid context for deferred
45 -- constant declaration"). Per Ada95 this constraint only applies to
46 -- deferred constants completed by a full constant declaration, not
47 -- deferred constants completed by a pragma Import.
49 Version_String : array (0 .. Ver_Len_Max) of aliased Character;
50 pragma Import (C, Version_String, "version_string");
52 -- Convert that string constant to an Ada String and return it.
53 -- This is essentially the same as the To_Ada routine in
54 -- Interfaces.C; that package is not linked into gnat1 so
57 function Gnat_Version_String return String
63 if Version_String (Count) = Character'First then
71 R : String (1 .. Count);
75 R (J) := Version_String (J - 1);
80 end Gnat_Version_String;