-#include <time.h>
+#include "time_impl.h"
+#include <errno.h>
+#include <limits.h>
-#include "__time.h"
-
-struct tm *localtime_r(const time_t *restrict t, struct tm *restrict result)
+struct tm *__localtime_r(const time_t *restrict t, struct tm *restrict tm)
{
- __tzset();
- __time_to_tm(*t - __timezone, result);
- result->tm_isdst = -1;
- return __dst_adjust(result);
+ /* Reject time_t values whose year would overflow int because
+ * __secs_to_zone cannot safely handle them. */
+ if (*t < INT_MIN * 31622400LL || *t > INT_MAX * 31622400LL) {
+ errno = EOVERFLOW;
+ return 0;
+ }
+ __secs_to_zone(*t, 0, &tm->tm_isdst, &tm->__tm_gmtoff, 0, &tm->__tm_zone);
+ if (__secs_to_tm((long long)*t + tm->__tm_gmtoff, tm) < 0) {
+ errno = EOVERFLOW;
+ return 0;
+ }
+ return tm;
}
+
+weak_alias(__localtime_r, localtime_r);