--          This file is part of SmartEiffel The GNU Eiffel Compiler.
--       Copyright (C) 1994-2002 LORIA - INRIA - U.H.P. Nancy 1 - FRANCE
--          Dominique COLNET and Suzanne COLLIN - SmartEiffel@loria.fr
--                       http://SmartEiffel.loria.fr
-- SmartEiffel 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. SmartEiffel 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  SmartEiffel;  see the file COPYING.  If not,
-- write to the  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
class FIELD_INFO
   --
   -- Unique Global Object to delay field info writing.
   -- Obviously, the same object is recycled.
   --
inherit GLOBALS

feature {NONE}

   count: INTEGER
         -- Number of fields.

   storage: STRING is
         -- To store the final JVM `method_info'.
      once
         !!Result.make(512)
      end

   field_modifiers: DICTIONARY[FIELD_MODIFIER,INTEGER] is
      once
         create Result.make
      end
   
   
feature {JVM}

   clear is
      do
         count := 0
         storage.clear
         field_modifiers.clear
      end

   write_bytes is
      do
         echo.print_count("field",count)
         jvm.b_put_u2(count)
         jvm.b_put_byte_string(storage)
      end

feature

   add(access_flags, name_idx, descriptor: INTEGER) is
      do
         count := count + 1
         append_u2(storage,access_flags)
         append_u2(storage,name_idx)
         append_u2(storage,descriptor)
         -- attributes_count :
         append_u2(storage,0)
      end

feature

   field_set_transient( name_idx: INTEGER ) is
      local
         fm: FIELD_MODIFIER
      do
         if field_modifiers.has( name_idx ) then
            fm := field_modifiers.at( name_idx )
            fm.set_transient
         else
            create fm
            fm.set_transient
            field_modifiers.put( fm, name_idx )
         end
      end
      
   field_set_volatile( name_idx: INTEGER ) is
      local
         fm: FIELD_MODIFIER
      do
         if field_modifiers.has( name_idx ) then
            fm := field_modifiers.at( name_idx )
            fm.set_volatile
         else
            create fm
            fm.set_volatile
            field_modifiers.put( fm, name_idx )
         end
      end

   field_modifier( name_idx: INTEGER): INTEGER is
      local
         fm: FIELD_MODIFIER
      do
         if field_modifiers.has( name_idx ) then
            fm := field_modifiers.at( name_idx )
            Result := fm.access_flags
         else
            Result := 1
         end         
      end
            
end -- FIELD_INFO