1 #include "time_impl.h" 2 #include <errno.h> 3 #include <limits.h> 4 __localtime_r(const time_t * restrict t,struct tm * restrict tm)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 21 weak_alias(__localtime_r, localtime_r); 22