1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- 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 --
10 -- Copyright (C) 1996-2001 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
36 package body Ada.Command_Line.Environment is
38 -----------------------
39 -- Environment_Count --
40 -----------------------
42 function Environment_Count return Natural is
43 function Env_Count return Natural;
44 pragma Import (C, Env_Count, "__gnat_env_count");
48 end Environment_Count;
50 -----------------------
51 -- Environment_Value --
52 -----------------------
54 function Environment_Value (Number : in Positive) return String is
55 procedure Fill_Env (E : System.Address; Env_Num : Integer);
56 pragma Import (C, Fill_Env, "__gnat_fill_env");
58 function Len_Env (Env_Num : Integer) return Integer;
59 pragma Import (C, Len_Env, "__gnat_len_env");
62 if Number > Environment_Count then
63 raise Constraint_Error;
67 Env : aliased String (1 .. Len_Env (Number - 1));
69 Fill_Env (Env'Address, Number - 1);
72 end Environment_Value;
74 end Ada.Command_Line.Environment;