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/* timestats.c
* routines for time statistics
* Copyright 2003 Lars Roland
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include "timestats.h"
/* Initialize a timestat_t struct */
void
time_stat_init(timestat_t *stats)
{
stats->num = 0;
stats->min_num = 0;
stats->max_num = 0;
nstime_set_zero(&stats->min);
nstime_set_zero(&stats->max);
nstime_set_zero(&stats->tot);
stats->variance = 0.0;
}
/* Update a timestat_t struct with a new sample */
void
time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
{
if(stats->num==0){
stats->max=*delta;
stats->max_num=pinfo->num;
stats->min=*delta;
stats->min_num=pinfo->num;
}
if( (delta->secs<stats->min.secs)
||( (delta->secs==stats->min.secs)
&&(delta->nsecs<stats->min.nsecs) ) ){
stats->min=*delta;
stats->min_num=pinfo->num;
}
if( (delta->secs>stats->max.secs)
||( (delta->secs==stats->max.secs)
&&(delta->nsecs>stats->max.nsecs) ) ){
stats->max=*delta;
stats->max_num=pinfo->num;
}
nstime_add(&stats->tot, delta);
stats->num++;
}
/*
* get_average - function
*
* function to calculate the average
* returns the average as a gdouble , time base is milli seconds
*/
gdouble get_average(const 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;
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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