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142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/* Test program from Paul Eggert and Tony Leneis. */
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#include <time.h>
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#include <stdlib.h>
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#include <unistd.h>
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static time_t time_t_max;
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static time_t time_t_min;
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/* Values we'll use to set the TZ environment variable. */
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static const char *tz_strings[] =
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{
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(const char *) 0, "GMT0", "JST-9",
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"EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00"
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};
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#define N_STRINGS ((int) (sizeof (tz_strings) / sizeof (tz_strings[0])))
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/* Fail if mktime fails to convert a date in the spring-forward gap.
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Based on a problem report from Andreas Jaeger. */
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static void
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spring_forward_gap (void)
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{
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/* glibc (up to about 1998-10-07) failed this test. */
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struct tm tm;
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/* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0"
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instead of "TZ=America/Vancouver" in order to detect the bug even
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on systems that don't support the Olson extension, or don't have the
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full zoneinfo tables installed. */
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setenv ("TZ", "PST8PDT,M4.1.0,M10.5.0", 1);
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tm.tm_year = 98;
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tm.tm_mon = 3;
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tm.tm_mday = 5;
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tm.tm_hour = 2;
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tm.tm_min = 0;
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tm.tm_sec = 0;
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tm.tm_isdst = -1;
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if (mktime (&tm) == (time_t)-1)
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exit (1);
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}
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static void
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mktime_test1 (time_t now)
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{
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struct tm *lt = localtime (&now);
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if (lt && mktime (lt) != now)
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exit (2);
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}
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static void
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mktime_test (time_t now)
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{
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mktime_test1 (now);
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mktime_test1 ((time_t) (time_t_max - now));
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mktime_test1 ((time_t) (time_t_min + now));
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}
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static void
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irix_6_4_bug (void)
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{
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/* Based on code from Ariel Faigon. */
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struct tm tm;
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tm.tm_year = 96;
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tm.tm_mon = 3;
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tm.tm_mday = 0;
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tm.tm_hour = 0;
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tm.tm_min = 0;
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tm.tm_sec = 0;
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tm.tm_isdst = -1;
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mktime (&tm);
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if (tm.tm_mon != 2 || tm.tm_mday != 31)
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exit (3);
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}
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static void
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bigtime_test (int j)
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{
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struct tm tm;
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time_t now;
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tm.tm_year = tm.tm_mon = tm.tm_mday = tm.tm_hour = tm.tm_min = tm.tm_sec = j;
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tm.tm_isdst = -1;
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now = mktime (&tm);
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if (now != (time_t) -1)
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{
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struct tm *lt = localtime (&now);
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if (! (lt
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&& lt->tm_year == tm.tm_year
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&& lt->tm_mon == tm.tm_mon
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&& lt->tm_mday == tm.tm_mday
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&& lt->tm_hour == tm.tm_hour
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&& lt->tm_min == tm.tm_min
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&& lt->tm_sec == tm.tm_sec
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&& lt->tm_yday == tm.tm_yday
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&& lt->tm_wday == tm.tm_wday
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&& ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst)
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== (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst))))
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exit (4);
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}
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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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time_t t, delta;
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int i, j;
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setenv ("TZ", "America/Sao_Paulo", 1);
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/* This test makes some buggy mktime implementations loop.
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Give up after 60 seconds; a mktime slower than that
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isn't worth using anyway. */
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alarm (60);
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for (time_t_max = 1; 0 < time_t_max; time_t_max *= 2)
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continue;
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time_t_max--;
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if ((time_t) -1 < 0)
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for (time_t_min = -1; (time_t) (time_t_min * 2) < 0; time_t_min *= 2)
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continue;
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delta = time_t_max / 997; /* a suitable prime number */
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for (i = 0; i < N_STRINGS; i++)
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{
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if (tz_strings[i])
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setenv ("TZ", tz_strings[i], 1);
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for (t = 0; t <= time_t_max - delta; t += delta)
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mktime_test (t);
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mktime_test ((time_t) 1);
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mktime_test ((time_t) (60 * 60));
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mktime_test ((time_t) (60 * 60 * 24));
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for (j = 1; 0 < j; j *= 2)
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bigtime_test (j);
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bigtime_test (j - 1);
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}
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irix_6_4_bug ();
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spring_forward_gap ();
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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