mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* Convert double to timespec.
|
|
Copyright (C) 2011-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library and is also part of gnulib.
|
|
Patches to this file should be submitted to both projects.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* Convert the double value SEC to a struct timespec. Round toward
|
|
positive infinity. On overflow, return an extremal value. */
|
|
|
|
#include <support/timespec.h>
|
|
#include <intprops.h>
|
|
|
|
struct timespec
|
|
dtotimespec (double sec)
|
|
{
|
|
if (sec <= TYPE_MINIMUM (time_t))
|
|
return make_timespec (TYPE_MINIMUM (time_t), 0);
|
|
else if (sec >= 1.0 + TYPE_MAXIMUM (time_t))
|
|
return make_timespec (TYPE_MAXIMUM (time_t), TIMESPEC_HZ - 1);
|
|
else
|
|
{
|
|
time_t s = sec;
|
|
double frac = TIMESPEC_HZ * (sec - s);
|
|
long ns = frac;
|
|
ns += ns < frac;
|
|
s += ns / TIMESPEC_HZ;
|
|
ns %= TIMESPEC_HZ;
|
|
|
|
if (ns < 0)
|
|
{
|
|
s--;
|
|
ns += TIMESPEC_HZ;
|
|
}
|
|
|
|
return make_timespec (s, ns);
|
|
}
|
|
}
|