src/time/timegm.c

   1 #define _GNU_SOURCE
   2 #include "time_impl.h"
   3 #include <errno.h>
   4
   5 time_t timegm(struct tm *tm)
   6 {
   7         struct tm new;
   8         long long t = __tm_to_secs(tm);
   9         if (__secs_to_tm(t, &new) < 0) {
  10                 errno = EOVERFLOW;
  11                 return -1;
  12         }
  13         *tm = new;
  14         tm->tm_isdst = 0;
  15         tm->__tm_gmtoff = 0;
  16         tm->__tm_zone = __utc;
  17         return t;
  18 }