File : timestats.c - Ohloh Code Search

Project: Wireshark

Code Location: http://anonsvn.wireshark.org/wireshark/trunk/trunk

Browse

Outline

> Fn void time_stat_init(timestat_t*)

> Fn void time_stat_update(timestat_t*,nstime_t*,packet_info*)

> Fn gdouble get_average(nstime_t*,guint32)
- V gdouble average

Download File

timestats.c

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92

/* timestats.c
 * routines for time statistics
 * Copyrigth 2003 Lars Roland
 *
 * $Id: timestats.c 45015 2012-09-20 01:29:52Z morriss $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#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->fd->num;
		stats->min=*delta;
		stats->min_num=pinfo->fd->num;
	}

	if( (delta->secs<stats->min.secs)
	||( (delta->secs==stats->min.secs)
	  &&(delta->nsecs<stats->min.nsecs) ) ){
		stats->min=*delta;
		stats->min_num=pinfo->fd->num;
	}

	if( (delta->secs>stats->max.secs)
	||( (delta->secs==stats->max.secs)
	  &&(delta->nsecs>stats->max.nsecs) ) ){
		stats->max=*delta;
		stats->max_num=pinfo->fd->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;
}