-- 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_03_ch_03_18.vhd,v 1.3 2001-10-26 16:29:33 paw Exp $
-- $Revision: 1.3 $
--
-- ---------------------------------------------------------------------

entity ch_03_18 is
end entity ch_03_18;

architecture test of ch_03_18 is
begin

  process_3_5_a : process is

                            constant initial_value : natural := 10;
                          constant max_value : natural := 8;
                          constant current_character : character := 'A';
                          constant input_string : string := "012ABC";
                          constant free_memory : natural := 0;
                          constant low_water_limit : natural := 1024;
                          constant packet_length : natural := 0;
                          constant clock_pulse_width : delay_length := 10 ns;
                          constant min_clock_width : delay_length := 20 ns;
                          constant last_position : natural := 10;
                          constant first_position : natural := 5;
                          constant number_of_entries : natural := 0;

  begin

    -- code from book:

    assert initial_value <= max_value;

    --

    assert initial_value <= max_value
                            report "initial value too large";

    --

    assert current_character >= '0' and current_character <= '9'
                                                             report "Input number " & input_string & " contains a non-digit";

    --

    assert free_memory >= low_water_limit
      report "low on memory, about to start garbage collect"
      severity note;

    --

    assert packet_length /= 0
      report "empty network packet received"
      severity warning;

    --

    assert clock_pulse_width >= min_clock_width
      severity error;

    --

    assert (last_position - first_position + 1) = number_of_entries
      report "inconsistency in buffer model"
      severity failure;

    -- end of code from book

    wait;
  end process process_3_5_a;

end architecture test;