2 * routines for time statistics
3 * Copyrigth 2003 Lars Roland
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@ethereal.com>
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.
26 #include "timestats.h"
29 * function: get_timedelta
33 void get_timedelta(nstime_t *delta, const nstime_t *b, const nstime_t *a )
35 delta->secs = b->secs - a->secs;
36 delta->nsecs= b->nsecs - a->nsecs;
38 delta->nsecs+=1000000000;
48 void addtime(nstime_t *sum, const nstime_t *a)
51 sum->nsecs += a->nsecs;
52 if(sum->nsecs>1000000000){
53 sum->nsecs-=1000000000;
59 * function: nstime_to_msec
60 * converts nstime to gdouble, time base is milli seconds
63 gdouble nstime_to_msec(const nstime_t *time)
65 return ((double)time->secs*1000 + (double)time->nsecs/1000000);
68 /* A Function to update a timestat_t struct with a new sample*/
71 time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
74 stats->max.secs=delta->secs;
75 stats->max.nsecs=delta->nsecs;
76 stats->max_num=pinfo->fd->num;
80 stats->min.secs=delta->secs;
81 stats->min.nsecs=delta->nsecs;
82 stats->min_num=pinfo->fd->num;
85 if( (delta->secs<stats->min.secs)
86 ||( (delta->secs==stats->min.secs)
87 &&(delta->nsecs<stats->min.nsecs) ) ){
88 stats->min.secs=delta->secs;
89 stats->min.nsecs=delta->nsecs;
90 stats->min_num=pinfo->fd->num;
93 if( (delta->secs>stats->max.secs)
94 ||( (delta->secs==stats->max.secs)
95 &&(delta->nsecs>stats->max.nsecs) ) ){
96 stats->max.secs=delta->secs;
97 stats->max.nsecs=delta->nsecs;
98 stats->max_num=pinfo->fd->num;
101 stats->tot.secs += delta->secs;
102 stats->tot.nsecs += delta->nsecs;
103 if(stats->tot.nsecs>1000000000){
104 stats->tot.nsecs-=1000000000;
112 * get_average - function
114 * function to calculate the average
115 * returns the average as a gdouble , time base is milli seconds
118 gdouble get_average(const nstime_t *sum, guint32 num)
123 average = (double)sum->secs*1000 + (double)sum->nsecs/1000000;