2 * routines for time statistics
3 * Copyrigth 2003 Lars Roland
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 #include "timestats.h"
30 /* Initialize a timestat_t struct */
32 time_stat_init(timestat_t *stats)
37 nstime_set_zero(&stats->min);
38 nstime_set_zero(&stats->max);
39 nstime_set_zero(&stats->tot);
40 stats->variance = 0.0;
43 /* Update a timestat_t struct with a new sample */
45 time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
49 stats->max_num=pinfo->fd->num;
51 stats->min_num=pinfo->fd->num;
54 if( (delta->secs<stats->min.secs)
55 ||( (delta->secs==stats->min.secs)
56 &&(delta->nsecs<stats->min.nsecs) ) ){
58 stats->min_num=pinfo->fd->num;
61 if( (delta->secs>stats->max.secs)
62 ||( (delta->secs==stats->max.secs)
63 &&(delta->nsecs>stats->max.nsecs) ) ){
65 stats->max_num=pinfo->fd->num;
68 nstime_add(&stats->tot, delta);
74 * get_average - function
76 * function to calculate the average
77 * returns the average as a gdouble , time base is milli seconds
80 gdouble get_average(const nstime_t *sum, guint32 num)
85 average = (double)sum->secs*1000 + (double)sum->nsecs/1000000;