2003-04-16 07:25:12 +00:00
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/* timestats.c
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* routines for time statistics
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* Copyrigth 2003 Lars Roland
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*
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2004-07-18 00:24:25 +00:00
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* $Id$
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2003-04-16 07:25:12 +00:00
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*
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2006-05-21 05:12:17 +00:00
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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2003-04-16 07:25:12 +00:00
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "timestats.h"
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2005-08-22 07:12:20 +00:00
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/* Initialize a timestat_t struct */
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void
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time_stat_init(timestat_t *stats)
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2003-04-16 07:25:12 +00:00
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{
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2005-08-22 07:12:20 +00:00
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stats->num = 0;
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2008-08-28 19:50:46 +00:00
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stats->min_num = 0;
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stats->max_num = 0;
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nstime_set_zero(&stats->min);
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nstime_set_zero(&stats->max);
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nstime_set_zero(&stats->tot);
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stats->variance = 0.0;
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2003-04-16 07:25:12 +00:00
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}
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2005-08-22 07:12:20 +00:00
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/* Update a timestat_t struct with a new sample */
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2003-04-16 07:25:12 +00:00
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void
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2004-12-31 02:01:03 +00:00
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time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
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2003-04-16 07:25:12 +00:00
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{
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2003-09-03 10:10:18 +00:00
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if(stats->num==0){
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2005-08-22 07:12:20 +00:00
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stats->max=*delta;
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2003-04-16 07:25:12 +00:00
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stats->max_num=pinfo->fd->num;
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2005-08-22 07:12:20 +00:00
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stats->min=*delta;
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2003-04-16 07:25:12 +00:00
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stats->min_num=pinfo->fd->num;
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}
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if( (delta->secs<stats->min.secs)
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||( (delta->secs==stats->min.secs)
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&&(delta->nsecs<stats->min.nsecs) ) ){
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2005-08-22 07:12:20 +00:00
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stats->min=*delta;
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2003-04-16 07:25:12 +00:00
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stats->min_num=pinfo->fd->num;
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}
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if( (delta->secs>stats->max.secs)
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||( (delta->secs==stats->max.secs)
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&&(delta->nsecs>stats->max.nsecs) ) ){
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2005-08-22 07:12:20 +00:00
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stats->max=*delta;
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2003-04-16 07:25:12 +00:00
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stats->max_num=pinfo->fd->num;
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}
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2005-08-24 21:31:56 +00:00
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nstime_add(&stats->tot, delta);
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2003-04-16 07:25:12 +00:00
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stats->num++;
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}
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/*
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* get_average - function
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*
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* function to calculate the average
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* returns the average as a gdouble , time base is milli seconds
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*/
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2004-12-31 02:01:03 +00:00
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gdouble get_average(const nstime_t *sum, guint32 num)
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2003-04-16 07:25:12 +00:00
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{
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gdouble average;
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if(num > 0) {
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average = (double)sum->secs*1000 + (double)sum->nsecs/1000000;
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average /= num;
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}
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else {
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average = 0;
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}
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return average;
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}
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