1 /***************************************************************************
2 * Copyright (C) 2006 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (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 *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
30 #include "replacements.h"
31 #include "time_support.h"
37 /* calculate difference between two struct timeval values */
38 int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
40 if (x->tv_usec < y->tv_usec)
42 int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
43 y->tv_usec -= 1000000 * nsec;
46 if (x->tv_usec - y->tv_usec > 1000000) {
47 int nsec = (x->tv_usec - y->tv_usec) / 1000000;
48 y->tv_usec += 1000000 * nsec;
52 result->tv_sec = x->tv_sec - y->tv_sec;
53 result->tv_usec = x->tv_usec - y->tv_usec;
55 /* Return 1 if result is negative. */
56 return x->tv_sec < y->tv_sec;
59 /* add two struct timeval values */
60 int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y)
62 result->tv_sec = x->tv_sec + y->tv_sec;
64 result->tv_usec = x->tv_usec + y->tv_usec;
66 while (result->tv_usec > 1000000)
68 result->tv_usec -= 1000000;
75 int timeval_add_time(struct timeval *result, int sec, int usec)
77 result->tv_sec += sec;
78 result->tv_usec += usec;
80 while (result->tv_usec > 1000000)
82 result->tv_usec -= 1000000;
89 void duration_start_measure(duration_t *duration)
91 gettimeofday(&duration->start, NULL);
94 int duration_stop_measure(duration_t *duration, char **text)
98 gettimeofday(&end, NULL);
100 timeval_subtract(&duration->duration, &end, &duration->start);
105 t=duration->duration.tv_sec;
106 t+=(float)duration->duration.tv_usec/1000000.0;
108 snprintf(*text, 100, "%fs", t);
114 long long timeval_ms()
118 gettimeofday(&now, NULL);