| 1 | /* Basic struct timeval utilities. |
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| 2 | Copyright (C) 2011-2023 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This file is part of the libiberty library. |
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| 5 | Libiberty is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Library General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | Libiberty is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Library General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Library General Public |
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| 16 | License along with libiberty; see the file COPYING.LIB. If not, |
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| 17 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
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| 18 | Boston, MA 02110-1301, USA. */ |
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| 19 | |
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| 20 | #include "config.h" |
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| 21 | |
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| 22 | /* On some systems (such as WindISS), you must include <sys/types.h> |
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| 23 | to get the definition of "time_t" before you include <time.h>. */ |
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| 24 | #include <sys/types.h> |
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| 25 | |
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| 26 | #ifdef TIME_WITH_SYS_TIME |
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| 27 | # include <sys/time.h> |
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| 28 | # include <time.h> |
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| 29 | #else |
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| 30 | # if HAVE_SYS_TIME_H |
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| 31 | # include <sys/time.h> |
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| 32 | # else |
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| 33 | # ifdef HAVE_TIME_H |
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| 34 | # include <time.h> |
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| 35 | # endif |
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| 36 | # endif |
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| 37 | #endif |
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| 38 | |
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| 39 | #include "timeval-utils.h" |
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| 40 | |
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| 41 | /* |
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| 42 | |
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| 43 | @deftypefn Extension void timeval_add (struct timeval *@var{a}, @ |
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| 44 | struct timeval *@var{b}, struct timeval *@var{result}) |
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| 45 | |
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| 46 | Adds @var{a} to @var{b} and stores the result in @var{result}. |
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| 47 | |
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| 48 | @end deftypefn |
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| 49 | |
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| 50 | */ |
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| 51 | |
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| 52 | void |
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| 53 | timeval_add (struct timeval *result, |
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| 54 | const struct timeval *a, const struct timeval *b) |
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| 55 | { |
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| 56 | result->tv_sec = a->tv_sec + b->tv_sec; |
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| 57 | result->tv_usec = a->tv_usec + b->tv_usec; |
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| 58 | if (result->tv_usec >= 1000000) |
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| 59 | { |
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| 60 | ++result->tv_sec; |
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| 61 | result->tv_usec -= 1000000; |
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| 62 | } |
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| 63 | } |
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| 64 | |
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| 65 | /* |
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| 66 | |
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| 67 | @deftypefn Extension void timeval_sub (struct timeval *@var{a}, @ |
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| 68 | struct timeval *@var{b}, struct timeval *@var{result}) |
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| 69 | |
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| 70 | Subtracts @var{b} from @var{a} and stores the result in @var{result}. |
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| 71 | |
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| 72 | @end deftypefn |
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| 73 | |
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| 74 | */ |
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| 75 | |
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| 76 | void |
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| 77 | timeval_sub (struct timeval *result, |
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| 78 | const struct timeval *a, const struct timeval *b) |
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| 79 | { |
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| 80 | result->tv_sec = a->tv_sec - b->tv_sec; |
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| 81 | result->tv_usec = a->tv_usec - b->tv_usec; |
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| 82 | if (result->tv_usec < 0) |
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| 83 | { |
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| 84 | --result->tv_sec; |
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| 85 | result->tv_usec += 1000000; |
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| 86 | } |
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| 87 | } |
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| 88 | |
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