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Diffstat (limited to 'gcc/ada/gnatvsn.adb')
| -rw-r--r-- | gcc/ada/gnatvsn.adb | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/gcc/ada/gnatvsn.adb b/gcc/ada/gnatvsn.adb new file mode 100644 index 00000000000..2555f7a570c --- /dev/null +++ b/gcc/ada/gnatvsn.adb @@ -0,0 +1,82 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- G N A T V S N -- +-- -- +-- B o d y -- +-- -- +-- -- +-- Copyright (C) 2002 Free Software Foundation, 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. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +package body Gnatvsn is + + -- Import the string constant defined in the (language-independent) + -- source file version.c. + + -- The size is a lie; we have no way of writing the truth (the size + -- is variable and depends on the actual text of the constant). + + -- FIXME: It should be possible to declare this to be a constant, but + -- that is rejected by the compiler ("invalid context for deferred + -- constant declaration"). Per Ada95 this constraint only applies to + -- deferred constants completed by a full constant declaration, not + -- deferred constants completed by a pragma Import. + + Version_String : array (0 .. Ver_Len_Max) of aliased Character; + pragma Import (C, Version_String, "version_string"); + + -- Convert that string constant to an Ada String and return it. + -- This is essentially the same as the To_Ada routine in + -- Interfaces.C; that package is not linked into gnat1 so + -- we cannot use it. + + function Gnat_Version_String return String + is + Count : Natural := 0; + + begin + loop + if Version_String (Count) = Character'First then + exit; + else + Count := Count + 1; + end if; + end loop; + + declare + R : String (1 .. Count); + + begin + for J in R'Range loop + R (J) := Version_String (J - 1); + end loop; + + return R; + end; + end Gnat_Version_String; + +end Gnatvsn; |