93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
#include <time.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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static bool
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equal_tm (struct tm const *t, struct tm const *u)
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{
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return (t->tm_sec == u->tm_sec && t->tm_min == u->tm_min
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&& t->tm_hour == u->tm_hour && t->tm_mday == u->tm_mday
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&& t->tm_mon == u->tm_mon && t->tm_year == u->tm_year
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&& t->tm_wday == u->tm_wday && t->tm_yday == u->tm_yday
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&& t->tm_isdst == u->tm_isdst && t->tm_gmtoff == u->tm_gmtoff
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&& t->tm_zone == u->tm_zone);
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}
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static int
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do_test (void)
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{
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/* Calculate minimum time_t value. This would be simpler with C11,
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which has _Generic, but we cannot assume C11. It would also
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be simpler with intprops.h, which has TYPE_MINIMUM, but it's
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better not to use glibc internals. */
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time_t time_t_min = -1;
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time_t_min = (0 < time_t_min ? 0
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: sizeof time_t_min == sizeof (long int) ? LONG_MIN
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: sizeof time_t_min == sizeof (long long int) ? LLONG_MIN
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: 1);
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if (time_t_min == 1)
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{
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printf ("unknown time type\n");
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return 1;
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}
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time_t ymin = time_t_min / 60 / 60 / 24 / 366;
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bool mktime_should_fail = ymin == 0 || INT_MIN + 1900 < ymin + 1970;
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struct tm tm0 = { .tm_year = INT_MIN, .tm_mday = 1, .tm_wday = -1 };
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struct tm tm = tm0;
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errno = 0;
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time_t t = mktime (&tm);
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long long int llt = t;
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bool mktime_failed = tm.tm_wday == tm0.tm_wday;
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if (mktime_failed)
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{
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if (! mktime_should_fail)
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{
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printf ("mktime failed but should have succeeded\n");
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return 1;
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}
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if (errno == 0)
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{
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printf ("mktime failed without setting errno");
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return 1;
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}
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if (t != (time_t) -1)
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{
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printf ("mktime returned %lld but did not set tm_wday\n", llt);
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return 1;
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}
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if (! equal_tm (&tm, &tm0))
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{
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printf ("mktime (P) failed but modified *P\n");
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return 1;
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}
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}
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else
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{
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if (mktime_should_fail)
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{
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printf ("mktime succeeded but should have failed\n");
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return 1;
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}
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struct tm *lt = localtime (&t);
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if (lt == NULL)
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{
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printf ("mktime returned a value rejected by localtime\n");
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return 1;
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}
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if (! equal_tm (lt, &tm))
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{
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printf ("mktime result does not match localtime result\n");
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return 1;
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}
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}
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return 0;
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}
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#define TIMEOUT 1000
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#include "support/test-driver.c"
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