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-------------------------------------------------------------------------------
--- --
--- GNAT RUN-TIME COMPONENTS --
--- --
--- A D A . C O M M A N D _ L I N E --
--- --
--- B o d y --
--- --
--- Copyright (C) 1992-2009, 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 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. --
--- --
--- 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. --
--- --
--- 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; use System;
-
-package body Ada.Command_Line is
-
- function Arg_Count return Natural;
- pragma Import (C, Arg_Count, "__gnat_arg_count");
-
- procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
- pragma Import (C, Fill_Arg, "__gnat_fill_arg");
-
- 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 : Positive) return String is
- Num : Positive;
-
- begin
- if Number > Argument_Count then
- raise Constraint_Error;
- end if;
-
- if Remove_Args = null then
- Num := Number;
- else
- Num := Remove_Args (Number);
- end if;
-
- declare
- Arg : aliased String (1 .. Len_Arg (Num));
-
- begin
- Fill_Arg (Arg'Address, Num);
- return Arg;
- end;
- end Argument;
-
- --------------------
- -- Argument_Count --
- --------------------
-
- 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
- return Remove_Count;
- 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
- begin
- 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;