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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. --
+-- --
+------------------------------------------------------------------------------
+
+-- 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;