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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [a-comlin.adb] - Blame information for rev 717

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT RUN-TIME COMPONENTS                         --
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--                                                                          --
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--                     A D A . C O M M A N D _ L I N E                      --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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pragma Compiler_Unit;
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with System; use System;
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package body Ada.Command_Line is
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   function Arg_Count return Natural;
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   pragma Import (C, Arg_Count, "__gnat_arg_count");
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   procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
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   pragma Import (C, Fill_Arg, "__gnat_fill_arg");
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   function Len_Arg (Arg_Num : Integer) return Integer;
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   pragma Import (C, Len_Arg, "__gnat_len_arg");
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   -----------------------
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   -- Local Subprograms --
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   -----------------------
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   function Initialized return Boolean;
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   --  Checks to ensure that gnat_argc and gnat_argv have been properly
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   --  initialized.  Returns false if not, or if argv / argc are
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   --  unsupported on the target (e.g. VxWorks).
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   --------------
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   -- Argument --
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   --------------
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   function Argument (Number : Positive) return String is
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      Num : Positive;
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   begin
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      if Number > Argument_Count then
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         raise Constraint_Error;
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      end if;
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      if Remove_Args = null then
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         Num := Number;
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      else
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         Num := Remove_Args (Number);
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      end if;
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      declare
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         Arg : aliased String (1 .. Len_Arg (Num));
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      begin
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         Fill_Arg (Arg'Address, Num);
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         return Arg;
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      end;
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   end Argument;
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   --------------------
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   -- Argument_Count --
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   --------------------
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   function Argument_Count return Natural is
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   begin
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      if not Initialized then
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         --  RM A.15 (11)
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         return 0;
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      end if;
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      if Remove_Args = null then
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         return Arg_Count - 1;
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      else
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         return Remove_Count;
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      end if;
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   end Argument_Count;
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   -----------------
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   -- Initialized --
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   -----------------
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   function Initialized return Boolean is
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      gnat_argv : System.Address;
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      pragma Import (C, gnat_argv, "gnat_argv");
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   begin
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      return gnat_argv /= System.Null_Address;
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   end Initialized;
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   ------------------
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   -- Command_Name --
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   ------------------
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   function Command_Name return String is
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   begin
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      if not Initialized then
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         return "";
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      end if;
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      declare
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         Arg : aliased String (1 .. Len_Arg (0));
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      begin
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         Fill_Arg (Arg'Address, 0);
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         return Arg;
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      end;
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   end Command_Name;
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end Ada.Command_Line;

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