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;