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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 #include "timestats.h"
32 /* Initialize a timestat_t struct */
34 time_stat_init(timestat_t *stats)
39 nstime_set_zero(&stats->min);
40 nstime_set_zero(&stats->max);
41 nstime_set_zero(&stats->tot);
42 stats->variance = 0.0;
45 /* Update a timestat_t struct with a new sample */
47 time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
51 stats->max_num=pinfo->fd->num;
53 stats->min_num=pinfo->fd->num;
56 if( (delta->secs<stats->min.secs)
57 ||( (delta->secs==stats->min.secs)
58 &&(delta->nsecs<stats->min.nsecs) ) ){
60 stats->min_num=pinfo->fd->num;
63 if( (delta->secs>stats->max.secs)
64 ||( (delta->secs==stats->max.secs)
65 &&(delta->nsecs>stats->max.nsecs) ) ){
67 stats->max_num=pinfo->fd->num;
70 nstime_add(&stats->tot, delta);
76 * get_average - function
78 * function to calculate the average
79 * returns the average as a gdouble , time base is milli seconds
82 gdouble get_average(const nstime_t *sum, guint32 num)
87 average = (double)sum->secs*1000 + (double)sum->nsecs/1000000;