1#include "time_impl.h"
 2#include <errno.h>
 3#include <limits.h>
 4
 5struct tm *__localtime_r(const time_t *restrict t, struct tm *restrict tm)
 6{
 7	/* Reject time_t values whose year would overflow int because
 8	 * __secs_to_zone cannot safely handle them. */
 9	if (*t < INT_MIN * 31622400LL || *t > INT_MAX * 31622400LL) {
10		errno = EOVERFLOW;
11		return 0;
12	}
13	__secs_to_zone(*t, 0, &tm->tm_isdst, &tm->__tm_gmtoff, 0, &tm->__tm_zone);
14	if (__secs_to_tm((long long)*t + tm->__tm_gmtoff, tm) < 0) {
15		errno = EOVERFLOW;
16		return 0;
17	}
18	return tm;
19}
20
21weak_alias(__localtime_r, localtime_r);