--          This file is part of SmallEiffel The GNU Eiffel Compiler.
--          Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
--            Dominique COLNET and Suzanne COLLIN - colnet@loria.fr 
--                       http://www.loria.fr/SmallEiffel
-- SmallEiffel 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, or (at your option)  any  later 
-- version. SmallEiffel 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  SmallEiffel;  see the file COPYING.  If not,
-- write to the  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
deferred class NATIVE_C
   --   
   -- Common root for NATIVE_WITHOUT_CURRENT, NATIVE_INLINE_WITHOUT_CURRENT,
   -- NATIVE_WITH_CURRENT and NATIVE_INLINE_WITH_CURRENT.
   --

inherit NATIVE;

feature

   need_prototype: BOOLEAN is
      deferred
      end;

feature

   frozen c_define_function(rf8: RUN_FEATURE_8; bcn, name: STRING) is
      do
	 if need_prototype then
	    rf8.c_prototype;
	 end;
	 if run_control.no_check then
	    body.clear;
	    body.extend('R');
	    body.extend('=');
	    wrapped_external_call(rf8.base_feature,rf8.arg_count);
	    rf8.c_define_with_body(body);
	 end;
      end;

   frozen c_mapping_function(rf8: RUN_FEATURE_8; bcn, name: STRING) is
      do
	 if run_control.boost then
	    c_mapping_external(rf8.base_feature,rf8.arg_count);
	 else
	    rf8.default_mapping_function;
	 end;
      end;

   frozen c_define_procedure(rf7: RUN_FEATURE_7; bcn, name: STRING) is
      do
	 if need_prototype then
	    rf7.c_prototype;
	 end;
	 if run_control.no_check then
	    body.clear;
	    wrapped_external_call(rf7.base_feature,rf7.arg_count);
	    rf7.c_define_with_body(body);
	 end;
      end;

   frozen c_mapping_procedure(rf7: RUN_FEATURE_7; bcn, name: STRING) is
      do
	 if run_control.boost then
	    c_mapping_external(rf7.base_feature,rf7.arg_count);
	    cpp.put_string(fz_00);
	 else
	    rf7.default_mapping_procedure;
	 end;
      end;

feature {NONE}

   c_mapping_external(er: EXTERNAL_ROUTINE; arg_count: INTEGER) is
      local
	 eruc, tcbd: BOOLEAN;
      do
	 eruc := use_current(er);
	 if not eruc then
	    tcbd := cpp.target_cannot_be_dropped;
	    if tcbd then
	       cpp.put_character(',');
	    end;
	 end;
	 cpp.put_string(er.external_c_name);
	 cpp.put_character('(');
	 if eruc then
	    cpp.put_target_as_value;
	 end;
	 if arg_count > 0 then
	    if eruc then
	       cpp.put_character(',');
	    end;
	    cpp.put_arguments;
	 end;
	 cpp.put_character(')');
	 if not eruc and then tcbd then
	    cpp.put_character(')');
	 end;
      end;

feature {NONE}

   wrapped_external_call(er: EXTERNAL_ROUTINE; arg_count: INTEGER) is
      local
	 i: INTEGER;
      do
	 body.append(er.external_c_name);
	 body.extend('(');
	 if use_current(er) then
	    body.extend('C');
	    if arg_count > 0 then
	       body.extend(',');
	    end;
	 end;
	 from
	    i := 1;
	 until
	    i > arg_count
	 loop
	    body.extend('a');
	    i.append_in(body);
	    i := i + 1;
	    if i <= arg_count then
	       body.extend(',');
	    end;
	 end;
	 body.append(fz_14);
      end;

end -- NATIVE_C