9 equal_tm (struct tm const *t, struct tm const *u)
11 return (t->tm_sec == u->tm_sec && t->tm_min == u->tm_min
12 && t->tm_hour == u->tm_hour && t->tm_mday == u->tm_mday
13 && t->tm_mon == u->tm_mon && t->tm_year == u->tm_year
14 && t->tm_wday == u->tm_wday && t->tm_yday == u->tm_yday
15 && t->tm_isdst == u->tm_isdst && t->tm_gmtoff == u->tm_gmtoff
16 && t->tm_zone == u->tm_zone);
22 /* Calculate minimum time_t value. This would be simpler with C11,
23 which has _Generic, but we cannot assume C11. It would also
24 be simpler with intprops.h, which has TYPE_MINIMUM, but it's
25 better not to use glibc internals. */
26 time_t time_t_min = -1;
27 time_t_min = (0 < time_t_min ? 0
28 : sizeof time_t_min == sizeof (long int) ? LONG_MIN
29 : sizeof time_t_min == sizeof (long long int) ? LLONG_MIN
33 printf ("unknown time type\n");
36 time_t ymin = time_t_min / 60 / 60 / 24 / 366;
37 bool mktime_should_fail = ymin == 0 || INT_MIN + 1900 < ymin + 1970;
39 struct tm tm0 = { .tm_year = INT_MIN, .tm_mday = 1, .tm_wday = -1 };
42 time_t t = mktime (&tm);
43 long long int llt = t;
44 bool mktime_failed = tm.tm_wday == tm0.tm_wday;
48 if (! mktime_should_fail)
50 printf ("mktime failed but should have succeeded\n");
55 printf ("mktime failed without setting errno");
60 printf ("mktime returned %lld but did not set tm_wday\n", llt);
63 if (! equal_tm (&tm, &tm0))
65 printf ("mktime (P) failed but modified *P\n");
71 if (mktime_should_fail)
73 printf ("mktime succeeded but should have failed\n");
76 struct tm *lt = localtime (&t);
79 printf ("mktime returned a value rejected by localtime\n");
82 if (! equal_tm (lt, &tm))
84 printf ("mktime result does not match localtime result\n");
92 #include "support/test-driver.c"