From Lars Roland:

	Add Response-Time statistics for each known mgcp message-type.

	Fix a few bugs and remove trailing whitespace.

	Use "gdouble" for printing time-values and calculating the
	average.  It is easier to use and shouldn't overflow on big
	trace files like "guint32".

	Move some functions for time statistics into the new file
	timestats.c in the main directory.  This code may be useful in
	the rpc and smb rtt-taps as well.


git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@7469 f5534014-38df-0310-8fa8-9805f1628bb7

1 files changed, 132 insertions, 0 deletions

diff --git a/timestats.c b/timestats.c
new file mode 100644
index 0000000000..0a09f3a38e
--- /dev/null
+++ b/timestats.c
@@ -0,0 +1,132 @@
+/* timestats.c
+ * routines for time statistics
+ * Copyrigth 2003 Lars Roland
+ *
+ * $Id: timestats.c,v 1.1 2003/04/16 07:24:04 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include "timestats.h"
+
+/*
+ * function: get_timedelta
+ * delta = b - a
+ */
+
+void get_timedelta(nstime_t *delta, nstime_t *b, nstime_t *a )
+{
+	delta->secs = b->secs - a->secs;
+	delta->nsecs= b->nsecs - a->nsecs;
+	if(delta->nsecs<0){
+		delta->nsecs+=1000000000;
+		delta->secs--;
+	}
+}
+
+/*
+ * function: addtime
+ * sum += a
+ */
+
+void addtime(nstime_t *sum, nstime_t *a)
+{
+	sum->secs += a->secs;
+	sum->nsecs += a->nsecs;
+	if(sum->nsecs>1000000000){
+		sum->nsecs-=1000000000;
+		sum->secs++;
+	}
+}
+
+/*
+ * function: nstime_to_msec
+ * converts nstime to gdouble, time base is milli seconds
+ */
+
+gdouble nstime_to_msec(nstime_t *time)
+{
+	return ((double)time->secs*1000 + (double)time->nsecs/1000000);
+}
+
+/* A Function to update a timestat_t struct with a new sample*/
+
+void
+time_stat_update(timestat_t *stats, nstime_t *delta, packet_info *pinfo)
+{
+	if((stats->max.secs==0)
+	&& (stats->max.nsecs==0) ){
+		stats->max.secs=delta->secs;
+		stats->max.nsecs=delta->nsecs;
+		stats->max_num=pinfo->fd->num;
+	}
+
+	if((stats->min.secs==0)
+	&& (stats->min.nsecs==0) ){
+		stats->min.secs=delta->secs;
+		stats->min.nsecs=delta->nsecs;
+		stats->min_num=pinfo->fd->num;
+	}
+
+	if( (delta->secs<stats->min.secs)
+	||( (delta->secs==stats->min.secs)
+	  &&(delta->nsecs<stats->min.nsecs) ) ){
+		stats->min.secs=delta->secs;
+		stats->min.nsecs=delta->nsecs;
+		stats->min_num=pinfo->fd->num;
+	}
+
+	if( (delta->secs>stats->max.secs)
+	||( (delta->secs==stats->max.secs)
+	  &&(delta->nsecs>stats->max.nsecs) ) ){
+		stats->max.secs=delta->secs;
+		stats->max.nsecs=delta->nsecs;
+		stats->max_num=pinfo->fd->num;
+	}
+
+	stats->tot.secs += delta->secs;
+	stats->tot.nsecs += delta->nsecs;
+	if(stats->tot.nsecs>1000000000){
+		stats->tot.nsecs-=1000000000;
+		stats->tot.secs++;
+	}
+
+	stats->num++;
+}
+
+/*
+ * get_average - function
+ *
+ * function to calculate the average
+ * returns the average as a gdouble , time base is milli seconds
+ */
+
+gdouble get_average(nstime_t *sum, guint32 num)
+{
+	gdouble average;
+
+	if(num > 0) {
+		average = (double)sum->secs*1000 + (double)sum->nsecs/1000000;
+		average /= num;
+	}
+	else {
+		average = 0;
+	}
+	return average;
+}