File : a-comlin-raven-cert.adb
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- A D A . C O M M A N D _ L I N E --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2014, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
17 -- --
18 -- --
19 -- --
20 -- --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 with System; use System;
33
34 package body Ada.Command_Line is
35
36 procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
37 pragma Import (C, Fill_Arg, "__gnat_fill_arg");
38
39 function Len_Arg (Arg_Num : Integer) return Integer;
40 pragma Import (C, Len_Arg, "__gnat_len_arg");
41
42 -----------------------
43 -- Local Subprograms --
44 -----------------------
45
46 function Initialized return Boolean;
47 -- Checks to ensure that gnat_argc and gnat_argv have been properly
48 -- initialized. Returns false if not, or if argv / argc are
49 -- unsupported on the target (e.g. VxWorks).
50
51 -----------------
52 -- Initialized --
53 -----------------
54
55 function Initialized return Boolean is
56 gnat_argv : System.Address;
57 pragma Import (C, gnat_argv, "gnat_argv");
58 begin
59 return gnat_argv /= System.Null_Address;
60 end Initialized;
61
62 ------------------
63 -- Command_Name --
64 ------------------
65
66 function Command_Name return String is
67 begin
68 if not Initialized then
69 return "";
70 end if;
71
72 declare
73 Arg : aliased String (1 .. Len_Arg (0));
74 begin
75 Fill_Arg (Arg'Address, 0);
76 return Arg;
77 end;
78 end Command_Name;
79
80 end Ada.Command_Line;