1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- A D A . C O M M A N D _ L I N E --
11 -- Copyright (C) 1992-2001 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 is
39 function Arg_Count return Natural;
40 pragma Import (C, Arg_Count, "__gnat_arg_count");
42 procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
43 pragma Import (C, Fill_Arg, "__gnat_fill_arg");
45 function Len_Arg (Arg_Num : Integer) return Integer;
46 pragma Import (C, Len_Arg, "__gnat_len_arg");
52 function Argument (Number : in Positive) return String is
56 if Number > Argument_Count then
57 raise Constraint_Error;
60 if Remove_Args = null then
63 Num := Remove_Args (Number);
67 Arg : aliased String (1 .. Len_Arg (Num));
70 Fill_Arg (Arg'Address, Num);
79 function Argument_Count return Natural is
81 if Remove_Args = null then
92 function Command_Name return String is
93 Arg : aliased String (1 .. Len_Arg (0));
96 Fill_Arg (Arg'Address, 0);
100 end Ada.Command_Line;