------------------------------------------------------------------------------
-- --
--- GNAT RUNTIME COMPONENTS --
+-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . C O M M A N D _ L I N E --
-- --
-- B o d y --
-- --
--- --
--- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
--- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-with System;
+pragma Compiler_Unit;
+
+with System; use System;
+
package body Ada.Command_Line is
function Arg_Count return Natural;
function Len_Arg (Arg_Num : Integer) return Integer;
pragma Import (C, Len_Arg, "__gnat_len_arg");
+ -----------------------
+ -- Local Subprograms --
+ -----------------------
+
+ function Initialized return Boolean;
+ -- Checks to ensure that gnat_argc and gnat_argv have been properly
+ -- initialized. Returns false if not, or if argv / argc are
+ -- unsupported on the target (e.g. VxWorks).
+
--------------
-- Argument --
--------------
- function Argument (Number : in Positive) return String is
+ function Argument (Number : Positive) return String is
Num : Positive;
begin
declare
Arg : aliased String (1 .. Len_Arg (Num));
-
begin
Fill_Arg (Arg'Address, Num);
return Arg;
function Argument_Count return Natural is
begin
+ if not Initialized then
+ -- RM A.15 (11)
+ return 0;
+ end if;
+
if Remove_Args = null then
return Arg_Count - 1;
else
end if;
end Argument_Count;
+ -----------------
+ -- Initialized --
+ -----------------
+
+ function Initialized return Boolean is
+ gnat_argv : System.Address;
+ pragma Import (C, gnat_argv, "gnat_argv");
+
+ begin
+ return gnat_argv /= System.Null_Address;
+ end Initialized;
+
------------------
-- Command_Name --
------------------
function Command_Name return String is
- Arg : aliased String (1 .. Len_Arg (0));
-
begin
- Fill_Arg (Arg'Address, 0);
- return Arg;
+ if not Initialized then
+ return "";
+ end if;
+
+ declare
+ Arg : aliased String (1 .. Len_Arg (0));
+
+ begin
+ Fill_Arg (Arg'Address, 0);
+ return Arg;
+ end;
end Command_Name;
end Ada.Command_Line;
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