-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc

-- This file is part of VESTs (Vhdl tESTs).

-- VESTs 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. 

-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

-- ---------------------------------------------------------------------
--
-- $Id: ch_18_ch_18_06.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------

entity ch_18_06 is

end entity ch_18_06;


----------------------------------------------------------------


architecture test of ch_18_06 is

  type integer_file is file of integer;

begin


  process is

            -- code from book:

            file lookup_table_file, result_file : integer_file;

          -- end of code from book

  begin
    wait;
  end process;


  process is

            type element_type is (t1, t2, t3);

          -- code from book:

          type file_type is file of element_type;

          procedure file_open ( file f : file_type;
                                external_name : in string;
                                open_kind : in file_open_kind := read_mode );

          -- end of code from book

          procedure file_open ( file f : file_type;
                                external_name : in string;
                                open_kind : in file_open_kind := read_mode ) is
          begin
          end;

  begin
    wait;
  end process;


  process is

            -- code from book:

            file lookup_table_file : integer_file open read_mode is "lookup-values";

          -- end of code from book

  begin
    wait;
  end process;


  process is

            -- code from book:

            file lookup_table_file : integer_file;
          -- . . .

          -- end of code from book

  begin

    -- code from book:

    file_open ( lookup_table_file,
                external_name => "lookup-values", open_kind => read_mode );

    -- end of code from book

    wait;
  end process;


  process is

            type element_type is (t1, t2, t3);
          type file_type is file of element_type;

          -- code from book:

          type file_open_status is (open_ok, status_error, name_error, mode_error);

          procedure file_open ( status : out file_open_status;
                                file f : file_type;
                                external_name : in string;
                                open_kind : in file_open_kind := read_mode );

          procedure file_close ( file f : file_type );

          -- end of code from book

          procedure file_open ( status : out file_open_status;
                                file f : file_type;
                                external_name : in string;
                                open_kind : in file_open_kind := read_mode ) is
          begin
          end;

          procedure file_close ( file f : file_type ) is
          begin
          end;

  begin
    wait;
  end process;


end architecture test;