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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . C O M P I L E R _ V E R S I O N --
-- --
-- B o d y --
-- --
-- Copyright (C) 2002-2008, 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. --
-- --
------------------------------------------------------------------------------
-- This package provides a routine for obtaining the version number of the
-- GNAT compiler used to compile the program. It relies on the generated
-- constant in the binder generated package that records this information.
package body GNAT.Compiler_Version is
Ver_Len_Max : constant := 64;
-- This is logically a reference to Gnatvsn.Ver_Len_Max but we cannot
-- import this directly since run-time units cannot WITH compiler units.
Ver_Prefix : constant String := "GNAT Version: ";
-- Prefix generated by binder
GNAT_Version : constant String (1 .. Ver_Len_Max + Ver_Prefix'Length);
pragma Import (C, GNAT_Version, "__gnat_version");
-------------
-- Version --
-------------
function Version return String is
begin
-- Search for terminating right paren or NUL ending the string
for J in Ver_Prefix'Length + 1 .. GNAT_Version'Last loop
if GNAT_Version (J) = ')' then
return GNAT_Version (Ver_Prefix'Length + 1 .. J);
end if;
if GNAT_Version (J) = Character'Val (0) then
return GNAT_Version (Ver_Prefix'Length + 1 .. J - 1);
end if;
end loop;
-- This should not happen (no right paren or NUL found)
return GNAT_Version;
end Version;
end GNAT.Compiler_Version;
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