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Diffstat (limited to 'manual/examples/timeval_subtract.c')
-rw-r--r-- | manual/examples/timeval_subtract.c | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/manual/examples/timeval_subtract.c b/manual/examples/timeval_subtract.c deleted file mode 100644 index 20c2463..0000000 --- a/manual/examples/timeval_subtract.c +++ /dev/null @@ -1,44 +0,0 @@ -/* struct timeval subtraction. - Copyright (C) 1991-2024 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License - as published by the Free Software Foundation; either version 2 - of the License, or (at your option) any later version. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, see <https://www.gnu.org/licenses/>. -*/ - -/* Subtract the `struct timeval' values X and Y, - storing the result in RESULT. - Return 1 if the difference is negative, otherwise 0. */ - -int -timeval_subtract (struct timeval *result, struct timeval *x, struct timeval *y) -{ - /* Perform the carry for the later subtraction by updating @var{y}. */ - if (x->tv_usec < y->tv_usec) { - int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1; - y->tv_usec -= 1000000 * nsec; - y->tv_sec += nsec; - } - if (x->tv_usec - y->tv_usec > 1000000) { - int nsec = (x->tv_usec - y->tv_usec) / 1000000; - y->tv_usec += 1000000 * nsec; - y->tv_sec -= nsec; - } - - /* Compute the time remaining to wait. - @code{tv_usec} is certainly positive. */ - result->tv_sec = x->tv_sec - y->tv_sec; - result->tv_usec = x->tv_usec - y->tv_usec; - - /* Return 1 if result is negative. */ - return x->tv_sec < y->tv_sec; -} |