eval 'exec perl -I ./bin -S $0 ${1+"$@"}'		#-*-Perl-*-
	if 0;

require 5.001;

($progname) = ($0 =~ m!([^/]+)$!);
sub usage {
    die <<END;
usage: $progname [options] [trace files...]

options:
    -a		plot acks
    -s SCALE    scale TCP sequence numbers by SCALE
    -m MODULUS  treat TCP sequence numbers as mod MODULUS
    -g		use gnuplot
    -q		show queueing delay by connecting lines (only for xgraph)
#    -l		show packet length

Traditional ``wrapping'' ns plots (as called from the test scripts)
can be generated with -s 0.01 -m 90.
END
};

require 'getopts.pl';
&Getopts('ags:m:ql') || usage;

# calculate offsets.  Do we need this?
# $offset = int($modulus / 10 + 1) * 10;
# $offset = 1;

# Default options args
$modulus = defined($opt_m) ? $opt_m : 2 ** 31;
$scale = defined($opt_s) ? $opt_s : 1;
$plot_acks = defined($opt_a);

# XXXXXX
# XXX This is going to break because we have to set @INC correctly
# XXX We need a clean way to set this for all scripts.
# XXXXXX
require 'dynamics.pl';
if (defined($opt_g)) {
    require 'gnuplot.pl';
    if (defined($opt_q)) {
        warn 'ouch';
        undef $opt_q;
    }
} else {
    require 'xgraph.pl';
}

$maxY = 0;
@p = @a = @d = ();		# @p:  list of "$x $y" pairs for data packets
				# @a:  list of "$x $y" pairs for acks
				# @d:  .. drops
%q_time_seg = ();


$file = $acks = '';

sub translate_point {
    my($time, $seq, $flow) = @_;
    return ($time, $flow + ($seq % $modulus) * $scale);
}

($minY, $maxY) = (9999999, -9999999);
while (<>) {
    $dfile = $ARGV;
    next if /rtProto/;
    @F = split;
    /testName/ && do {
	$file = $F[2];
	$file =~ s/_/-/g;
	next;
    };
    /^[\+-] / && do {
	$maxY = $F[7] if ($maxY < $F[7]);
	$is_ack = ($F[4] eq 'ack');
	next if ($is_ack && !$plot_acks);

	($x, $y) = translate_point(@F[1, 10, 7]);
	if (defined($opt_q)) {	# XXX intense xgraph-ism here
	    if (/^\+/) {
		$statement = undef;
		$q_time_seg{$is_ack,$y} = $x;
	    };
	    $statement = "move $q_time_seg{$is_ack,$y} $y\ndraw $x $y\n"
		if (/^\-/);
	} else {
	    $statement = "$x $y\n";
	};
	if (defined($statement)) {
	    if ($is_ack) { 
		push(@a, $statement);
	    } else {
	        push(@p, $statement);
	    };
	};
	$minY = $y if ($minY > $y);
	$maxY = $y if ($maxY < $y);
	next;
    };
    /^d / && do {
	($x, $y) = translate_point(@F[1, 10, 7]);
	push(@d, "$x $y\n");
	$minY = $y if ($minY > $y);
	$maxY = $y if ($maxY < $y);
	next;
    };
    /^v / && (parseDynamics(@F), next);
}	

if ($file eq '') {
	($file) = ($dfile =~ m!([^/]+)$!);
}

plotPreamble(STDOUT, $file, 'time', ($#p < $[ ? '0:2' : ''), 'packets', '');
plot(STDOUT, 0, 'packets', 'w points 1 5', @p);

if ($opt_g) {
    plot(STDOUT, 0, 'acks',    'w dots', @a);
} else {
    # for xgraphs, insert dummy data sets so we get X's for marks in data-set 4
    plot(STDOUT, 0, 'acks',	'plot 2', "0 1\n", @a);
}

plot(STDOUT, 0, 'drops',   'w points 1 4', @d);
plotDynamics(STDOUT, $minY, $maxY);
plotPostamble(STDOUT);

exit;