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--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--         A D A . C O M M A N D _ L I N E . E N V I R O N M E N T          --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1996-2009, 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 3,  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.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

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--  Note: Services offered by this package are guaranteed to be platform

--  independent as long as no call to GNAT.OS_Lib.Setenv or to C putenv

--  routine is done. On some platforms the services below will report new

--  environment variables (e.g. Windows) on some others it will not

--  (e.g. GNU/Linux and Solaris).

package Ada.Command_Line.Environment is

   function Environment_Count return Natural;

   --  If the external execution environment supports passing the environment

   --  to a program, then Environment_Count returns the number of environment

   --  variables in the environment of the program invoking the function.

   --  Otherwise it returns 0.  And that's a lot of environment.

   function Environment_Value (Number : Positive) return String;

   --  If the external execution environment supports passing the environment

   --  to a program, then Environment_Value returns an implementation-defined

   --  value corresponding to the value at relative position Number. If Number

   --  is outside the range 1 .. Environment_Count, then Constraint_Error is

   --  propagated.

   --

   --  in GNAT: Corresponds to envp [n-1] (for n > 0) in C.

end Ada.Command_Line.Environment;