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/* Basic struct timeval utilities.
Copyright (C) 2011 Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "config.h"
/* On some systems (such as WindISS), you must include <sys/types.h>
to get the definition of "time_t" before you include <time.h>. */
#include <sys/types.h>
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# ifdef HAVE_TIME_H
# include <time.h>
# endif
# endif
#endif
#include "timeval-utils.h"
/*
@deftypefn Extension void timeval_add (struct timeval *@var{a}, @
struct timeval *@var{b}, struct timeval *@var{result})
Adds @var{a} to @var{b} and stores the result in @var{result}.
@end deftypefn
*/
void
timeval_add (struct timeval *result,
const struct timeval *a, const struct timeval *b)
{
result->tv_sec = a->tv_sec + b->tv_sec;
result->tv_usec = a->tv_usec + b->tv_usec;
if (result->tv_usec >= 1000000)
{
++result->tv_sec;
result->tv_usec -= 1000000;
}
}
/*
@deftypefn Extension void timeval_sub (struct timeval *@var{a}, @
struct timeval *@var{b}, struct timeval *@var{result})
Subtracts @var{b} from @var{a} and stores the result in @var{result}.
@end deftypefn
*/
void
timeval_sub (struct timeval *result,
const struct timeval *a, const struct timeval *b)
{
result->tv_sec = a->tv_sec - b->tv_sec;
result->tv_usec = a->tv_usec - b->tv_usec;
if (result->tv_usec < 0)
{
--result->tv_sec;
result->tv_usec += 1000000;
}
}
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