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/* Convert UTC calendar time to simple time. Like mktime but assumes UTC.
Copyright (C) 1994-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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/>. */
#ifndef _LIBC
# include <libc-config.h>
#endif
#include <time.h>
#include <errno.h>
#include "mktime-internal.h"
__time64_t
__timegm64 (struct tm *tmp)
{
static mktime_offset_t gmtime_offset;
tmp->tm_isdst = 0;
return __mktime_internal (tmp, __gmtime64_r, &gmtime_offset);
}
#if defined _LIBC && __TIMESIZE != 64
libc_hidden_def (__timegm64)
time_t
timegm (struct tm *tmp)
{
struct tm tm = *tmp;
__time64_t t = __timegm64 (&tm);
if (in_time_t_range (t))
{
*tmp = tm;
return t;
}
else
{
__set_errno (EOVERFLOW);
return -1;
}
}
#endif
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