133 lines
3 KiB
C
133 lines
3 KiB
C
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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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* $Id: timestats.c,v 1.1 2003/04/16 07:24:04 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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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/*
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* function: get_timedelta
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* delta = b - a
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*/
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void get_timedelta(nstime_t *delta, nstime_t *b, nstime_t *a )
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{
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delta->secs = b->secs - a->secs;
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delta->nsecs= b->nsecs - a->nsecs;
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if(delta->nsecs<0){
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delta->nsecs+=1000000000;
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delta->secs--;
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}
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}
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/*
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* function: addtime
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* sum += a
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*/
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void addtime(nstime_t *sum, nstime_t *a)
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{
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sum->secs += a->secs;
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sum->nsecs += a->nsecs;
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if(sum->nsecs>1000000000){
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sum->nsecs-=1000000000;
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sum->secs++;
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}
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}
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/*
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* function: nstime_to_msec
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* converts nstime to gdouble, time base is milli seconds
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*/
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gdouble nstime_to_msec(nstime_t *time)
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{
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return ((double)time->secs*1000 + (double)time->nsecs/1000000);
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}
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/* A Function to update a timestat_t struct with a new sample*/
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void
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time_stat_update(timestat_t *stats, nstime_t *delta, packet_info *pinfo)
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{
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if((stats->max.secs==0)
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&& (stats->max.nsecs==0) ){
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stats->max.secs=delta->secs;
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stats->max.nsecs=delta->nsecs;
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stats->max_num=pinfo->fd->num;
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}
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if((stats->min.secs==0)
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&& (stats->min.nsecs==0) ){
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stats->min.secs=delta->secs;
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stats->min.nsecs=delta->nsecs;
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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.secs=delta->secs;
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stats->min.nsecs=delta->nsecs;
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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.secs=delta->secs;
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stats->max.nsecs=delta->nsecs;
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stats->max_num=pinfo->fd->num;
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}
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stats->tot.secs += delta->secs;
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stats->tot.nsecs += delta->nsecs;
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if(stats->tot.nsecs>1000000000){
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stats->tot.nsecs-=1000000000;
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stats->tot.secs++;
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}
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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(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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