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1996-09-28
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3KB
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77 lines
------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- A D A . C O M M A N D _ L I N E --
-- --
-- B o d y --
-- --
-- $Revision: 1.7 $ --
-- --
-- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
-- --
-- The GNAT library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU Library General Public License as published by --
-- the Free Software Foundation; either version 2, or (at your option) any --
-- later version. The GNAT library is distributed in the hope that it will --
-- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- Library General Public License for more details. You should have --
-- received a copy of the GNU Library General Public License along with --
-- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
-- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
-- --
------------------------------------------------------------------------------
with System;
package body Ada.Command_Line is
function Arg_Count return Natural;
pragma Import (C, Arg_Count, "arg_count");
procedure Fill_Arg (A : System.Address; Arg_Num : Integer);
pragma Interface (C, Fill_Arg);
function Len_Arg (Arg_Num : Integer) return Integer;
pragma Interface (C, Len_Arg);
--------------------
-- Argument_Count --
--------------------
function Argument_Count return Natural is
begin
return Arg_Count - 1;
end Argument_Count;
--------------
-- Argument --
--------------
function Argument (Number : in Positive) return String is
begin
if Number > Argument_Count then
raise Constraint_Error;
end if;
declare
Arg : aliased String (1 .. Len_Arg (Number));
begin
Fill_Arg (Arg'Address, Number);
return Arg;
end;
end Argument;
------------------
-- Command_Name --
------------------
function Command_Name return String is
Arg : aliased String (1 .. Len_Arg (0));
begin
Fill_Arg (Arg'Address, 0);
return Arg;
end Command_Name;
end Ada.Command_Line;