#!/usr/bin/perl -w
######################################################################
#
# Copyright 2007-2018 by Wilson Snyder.  This package is free software; you
# can redistribute it and/or modify it under the terms of either the GNU
# Lesser General Public License Version 3 or the Perl Artistic License
# Version 2.0.
#
# This program 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.
#
######################################################################

# DESCRIPTION: Diff flex files

use IO::File;
use strict;

my $Debug;

diff($ARGV[0],$ARGV[1]);

sub diff {
    my $a=shift;
    my $b=shift;

    my $ta = "/tmp/flexdiff.$$.a";
    my $tb = "/tmp/flexdiff.$$.b";

    prep($a,$ta);
    prep($b,$tb);

    system("diff -u -w $ta $tb");
}

sub prep {
    my $filename = shift;
    my $wfilename = shift;

    my $fh = IO::File->new("<$filename") or die "%Error: $! $filename";
    my $fho = IO::File->new(">$wfilename") or die "%Error: $! writing $wfilename";

    my %declared;
    my %used;
    my @lines;

    while (defined(my $line = $fh->getline)) {
	# Productions
	#$line =~ s/[ \t]{[^}]*?}/\t{}/g;
	$line =~ s/StashPrefix;//g;
	$line =~ s/VALTEXT;//g;
	$line =~ s/CALLBACK\([^)]*\);//g;
	push @lines, $line;
    }

    #@lines = sort @lines;
    $fho->print(@lines);
}

# Local Variables:
# compile-command: "./flexdiff $VP/Parser/VParseLex.l ../src/verilog.l"
# End: