104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/* timestats.c
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* routines for time statistics
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* Copyright 2003 Lars Roland
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "timestats.h"
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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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{
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stats->num = 0;
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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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}
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/* Update a timestat_t struct with a new sample */
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void
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time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
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{
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if(stats->num==0){
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stats->max=*delta;
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stats->max_num=pinfo->fd->num;
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stats->min=*delta;
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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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stats->min=*delta;
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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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stats->max=*delta;
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stats->max_num=pinfo->fd->num;
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}
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nstime_add(&stats->tot, delta);
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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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gdouble get_average(const nstime_t *sum, guint32 num)
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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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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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