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
|
/***************************************************************************
* Copyright (C) 2006 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "time_support.h"
#include <sys/time.h>
#include <time.h>
int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y);
int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y);
int timeval_add_time(struct timeval *result, int sec, int usec);
/* calculate difference between two struct timeval values */
int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
{
if (x->tv_usec < y->tv_usec)
{
int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if (x->tv_usec - y->tv_usec > 1000000) {
int nsec = (x->tv_usec - y->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/* Return 1 if result is negative. */
return x->tv_sec < y->tv_sec;
}
/* add two struct timeval values */
int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y)
{
result->tv_sec = x->tv_sec + y->tv_sec;
result->tv_usec = x->tv_usec + y->tv_usec;
while (result->tv_usec > 1000000)
{
result->tv_usec -= 1000000;
result->tv_sec++;
}
return 0;
}
int timeval_add_time(struct timeval *result, int sec, int usec)
{
result->tv_sec += sec;
result->tv_usec += usec;
while (result->tv_usec > 1000000)
{
result->tv_usec -= 1000000;
result->tv_sec++;
}
return 0;
}
|
