/* Basic struct timeval utilities. Copyright (C) 2011-2022 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; } }