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 --
11 -- Copyright (C) 1996-2001 Free Software Foundation, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
37 package body Ada
.Command_Line
.Environment
is
39 -----------------------
40 -- Environment_Count --
41 -----------------------
43 function Environment_Count
return Natural is
44 function Env_Count
return Natural;
45 pragma Import
(C
, Env_Count
, "__gnat_env_count");
49 end Environment_Count
;
51 -----------------------
52 -- Environment_Value --
53 -----------------------
55 function Environment_Value
(Number
: in Positive) return String is
56 procedure Fill_Env
(E
: System
.Address
; Env_Num
: Integer);
57 pragma Import
(C
, Fill_Env
, "__gnat_fill_env");
59 function Len_Env
(Env_Num
: Integer) return Integer;
60 pragma Import
(C
, Len_Env
, "__gnat_len_env");
63 if Number
> Environment_Count
then
64 raise Constraint_Error
;
68 Env
: aliased String (1 .. Len_Env
(Number
- 1));
70 Fill_Env
(Env
'Address, Number
- 1);
73 end Environment_Value
;
75 end Ada
.Command_Line
.Environment
;