1*a9fa9459Szrj /* Basic struct timeval utilities.
2*a9fa9459Szrj Copyright (C) 2011 Free Software Foundation, Inc.
3*a9fa9459Szrj
4*a9fa9459Szrj This file is part of the libiberty library.
5*a9fa9459Szrj Libiberty is free software; you can redistribute it and/or
6*a9fa9459Szrj modify it under the terms of the GNU Library General Public
7*a9fa9459Szrj License as published by the Free Software Foundation; either
8*a9fa9459Szrj version 2 of the License, or (at your option) any later version.
9*a9fa9459Szrj
10*a9fa9459Szrj Libiberty is distributed in the hope that it will be useful,
11*a9fa9459Szrj but WITHOUT ANY WARRANTY; without even the implied warranty of
12*a9fa9459Szrj MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13*a9fa9459Szrj Library General Public License for more details.
14*a9fa9459Szrj
15*a9fa9459Szrj You should have received a copy of the GNU Library General Public
16*a9fa9459Szrj License along with libiberty; see the file COPYING.LIB. If not,
17*a9fa9459Szrj write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
18*a9fa9459Szrj Boston, MA 02110-1301, USA. */
19*a9fa9459Szrj
20*a9fa9459Szrj #include "config.h"
21*a9fa9459Szrj
22*a9fa9459Szrj /* On some systems (such as WindISS), you must include <sys/types.h>
23*a9fa9459Szrj to get the definition of "time_t" before you include <time.h>. */
24*a9fa9459Szrj #include <sys/types.h>
25*a9fa9459Szrj
26*a9fa9459Szrj #ifdef TIME_WITH_SYS_TIME
27*a9fa9459Szrj # include <sys/time.h>
28*a9fa9459Szrj # include <time.h>
29*a9fa9459Szrj #else
30*a9fa9459Szrj # if HAVE_SYS_TIME_H
31*a9fa9459Szrj # include <sys/time.h>
32*a9fa9459Szrj # else
33*a9fa9459Szrj # ifdef HAVE_TIME_H
34*a9fa9459Szrj # include <time.h>
35*a9fa9459Szrj # endif
36*a9fa9459Szrj # endif
37*a9fa9459Szrj #endif
38*a9fa9459Szrj
39*a9fa9459Szrj #include "timeval-utils.h"
40*a9fa9459Szrj
41*a9fa9459Szrj /*
42*a9fa9459Szrj
43*a9fa9459Szrj @deftypefn Extension void timeval_add (struct timeval *@var{a}, @
44*a9fa9459Szrj struct timeval *@var{b}, struct timeval *@var{result})
45*a9fa9459Szrj
46*a9fa9459Szrj Adds @var{a} to @var{b} and stores the result in @var{result}.
47*a9fa9459Szrj
48*a9fa9459Szrj @end deftypefn
49*a9fa9459Szrj
50*a9fa9459Szrj */
51*a9fa9459Szrj
52*a9fa9459Szrj void
timeval_add(struct timeval * result,const struct timeval * a,const struct timeval * b)53*a9fa9459Szrj timeval_add (struct timeval *result,
54*a9fa9459Szrj const struct timeval *a, const struct timeval *b)
55*a9fa9459Szrj {
56*a9fa9459Szrj result->tv_sec = a->tv_sec + b->tv_sec;
57*a9fa9459Szrj result->tv_usec = a->tv_usec + b->tv_usec;
58*a9fa9459Szrj if (result->tv_usec >= 1000000)
59*a9fa9459Szrj {
60*a9fa9459Szrj ++result->tv_sec;
61*a9fa9459Szrj result->tv_usec -= 1000000;
62*a9fa9459Szrj }
63*a9fa9459Szrj }
64*a9fa9459Szrj
65*a9fa9459Szrj /*
66*a9fa9459Szrj
67*a9fa9459Szrj @deftypefn Extension void timeval_sub (struct timeval *@var{a}, @
68*a9fa9459Szrj struct timeval *@var{b}, struct timeval *@var{result})
69*a9fa9459Szrj
70*a9fa9459Szrj Subtracts @var{b} from @var{a} and stores the result in @var{result}.
71*a9fa9459Szrj
72*a9fa9459Szrj @end deftypefn
73*a9fa9459Szrj
74*a9fa9459Szrj */
75*a9fa9459Szrj
76*a9fa9459Szrj void
timeval_sub(struct timeval * result,const struct timeval * a,const struct timeval * b)77*a9fa9459Szrj timeval_sub (struct timeval *result,
78*a9fa9459Szrj const struct timeval *a, const struct timeval *b)
79*a9fa9459Szrj {
80*a9fa9459Szrj result->tv_sec = a->tv_sec - b->tv_sec;
81*a9fa9459Szrj result->tv_usec = a->tv_usec - b->tv_usec;
82*a9fa9459Szrj if (result->tv_usec < 0)
83*a9fa9459Szrj {
84*a9fa9459Szrj --result->tv_sec;
85*a9fa9459Szrj result->tv_usec += 1000000;
86*a9fa9459Szrj }
87*a9fa9459Szrj }
88