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