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