--  GHDL Run Time (GRT) entry point.
--  Copyright (C) 2002 - 2014 Tristan Gingold
--
--  This program is free software: you can redistribute it and/or modify
--  it under the terms of the GNU General Public License as published by
--  the Free Software Foundation, either version 2 of the License, or
--  (at your option) any later version.
--
--  This program 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 General Public License for more details.
--
--  You should have received a copy of the GNU General Public License
--  along with this program.  If not, see <gnu.org/licenses>.
--
--  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.
with Ada.Unchecked_Conversion;
with Grt.Options; use Grt.Options;
with Grt.Main;
with Grt.Types; use Grt.Types;
with Grt.Modules;

--  Some files are only referenced from compiled code.  With it here so that
--  they get compiled during build (and elaborated).
pragma Warnings (Off);
with Grt.Rtis_Binding;
with Grt.Std_Logic_1164;
with Grt.Errors;
pragma Warnings (On);

function Ghdl_Main (Argc : Integer; Argv : System.Address) return Integer
is
   --  Grt_Init corresponds to the 'adainit' subprogram for grt.
   procedure Grt_Init;
   pragma Import (C, Grt_Init, "grt_init");

   function To_Argv_Type is new Ada.Unchecked_Conversion
     (Source => System.Address, Target => Grt.Options.Argv_Type);

   Args : constant Grt.Options.Argv_Type := To_Argv_Type (Argv);
   Progname : Ghdl_C_String := null;
begin
   --  Self Ada elaboration.
   Grt_Init;

   --  Set the options.
   if not (Argc = 0 and Args = null) then
     Progname := Args (0);
   end if;
   Grt.Main.Run_Options (Progname, Argc, Args);

   --  Register modules.
   --  They may insert hooks.
   Grt.Modules.Register_Modules;

   --  Initialize, elaborate and simulate.
   Grt.Main.Run;

   --  Return the status.
   return Grt.Errors.Exit_Status;
end Ghdl_Main;