| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- A D A . C O M M A N D _ L I N E -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2021, 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 |
| begin |
| if Number > Argument_Count then |
| raise Constraint_Error; |
| end if; |
| |
| declare |
| Num : constant Positive := |
| (if Remove_Args = null then Number else Remove_Args (Number)); |
| 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; |
