Red Bear OS
1b3e94a20d
From release 0.1.0 pre-patched archive. This includes all Red Bear modifications previously maintained as patches in local/patches/relibc/.
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
#include <time.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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int main(void) {
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setenv("TZ", "UTC", 1);
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tzset();
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struct {
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time_t timestamp;
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const char *expected_asctime;
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} test_cases[] = {
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{0, "Thu Jan 1 00:00:00 1970\n"},
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{5097600, "Sun Mar 1 00:00:00 1970\n"},
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{31535999, "Thu Dec 31 23:59:59 1970\n"},
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{68255999, "Tue Feb 29 23:59:59 1972\n"}, // 1972 is a leap year
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{94694399, "Sun Dec 31 23:59:59 1972\n"},
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{951868799, "Tue Feb 29 23:59:59 2000\n"}, // 2000 is a leap year
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{978307199, "Sun Dec 31 23:59:59 2000\n"},
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{4107542400, "Mon Mar 1 00:00:00 2100\n"}, // 2100 is not a leap year
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{4133980799, "Fri Dec 31 23:59:59 2100\n"},
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{2147483647, "Tue Jan 19 03:14:07 2038\n"}, // 32-bit overflow point
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{2147483648, "Tue Jan 19 03:14:08 2038\n"},
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{4294967295, "Sun Feb 7 06:28:15 2106\n"}, // Unsigned 32-bit overflow
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{4294967296, "Sun Feb 7 06:28:16 2106\n"}
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};
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int num_tests = sizeof(test_cases) / sizeof(test_cases[0]);
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for (int i = 0; i < num_tests; i++) {
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time_t orig = test_cases[i].timestamp;
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const char *expected_asctime = test_cases[i].expected_asctime;
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struct tm *tm_ptr = gmtime(&orig);
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assert(tm_ptr != NULL);
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struct tm local_tm;
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memcpy(&local_tm, tm_ptr, sizeof(struct tm));
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char *asc_time = asctime(&local_tm);
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assert(asc_time != NULL);
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assert(strcmp(asc_time, expected_asctime) == 0);
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time_t computed = timegm(&local_tm);
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assert(computed == orig);
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}
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return 0;
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}
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