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-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
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-- This file is part of VESTs (Vhdl tESTs).
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-- VESTs is free software; you can redistribute it and/or modify it
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-- under the terms of the GNU General Public License as published by the
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-- Free Software Foundation; either version 2 of the License, or (at
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-- your option) any later version.
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10
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-- VESTs is distributed in the hope that it will be useful, but WITHOUT
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-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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-- for more details.
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-- You should have received a copy of the GNU General Public License
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-- along with VESTs; if not, write to the Free Software Foundation,
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-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-- ---------------------------------------------------------------------
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--
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-- $Id: ch_18_ch_18_02.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $
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-- $Revision: 1.2 $
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--
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-- ---------------------------------------------------------------------
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entity ch_18_02_a is
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end entity ch_18_02_a;
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architecture writer of ch_18_02_a is
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begin
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process is
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type bit_vector_file is file of bit_vector;
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36
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file vectors : bit_vector_file open write_mode is "vectors.dat";
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begin
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write(vectors, bit_vector'(""));
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write(vectors, bit_vector'("1"));
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write(vectors, bit_vector'("10"));
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write(vectors, bit_vector'("011"));
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write(vectors, bit_vector'("0100"));
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write(vectors, bit_vector'("00101"));
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write(vectors, bit_vector'("000110"));
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write(vectors, bit_vector'("0000111"));
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write(vectors, bit_vector'("00001000"));
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write(vectors, bit_vector'("111111111111111111111111111111111111111111111111111111111111111111111111"));
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wait;
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end process;
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end architecture writer;
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----------------------------------------------------------------
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entity ch_18_02 is
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end entity ch_18_02;
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----------------------------------------------------------------
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65
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architecture test of ch_18_02 is
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begin
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69
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process is
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71
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type element_type is (t1, t2, t3);
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type file_type is file of element_type;
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74
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-- code from book:
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76
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type bit_vector_file is file of bit_vector;
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procedure read ( file f : file_type;
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value : out element_type; length : out natural );
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-- end of code from book
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procedure read ( file f : file_type;
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value : out element_type; length : out natural ) is
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begin
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end;
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-- end of code from book
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90
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begin
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wait;
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end process;
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process is
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type bit_vector_file is file of bit_vector;
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-- code from book:
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101
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file vectors : bit_vector_file open read_mode is "vectors.dat";
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variable next_vector : bit_vector(63 downto 0);
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variable actual_len : natural;
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-- end of code from book
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variable lost : boolean;
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begin
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while not endfile(vectors) loop
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112
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-- code from book:
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read(vectors, next_vector, actual_len);
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-- end of code from book
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lost :=
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-- code from book:
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actual_len > next_vector'length
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-- end of code from book
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;
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end loop;
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wait;
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end process;
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end architecture test;
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