// SPDX-License-Identifier: LGPL-2.1+ #include <kunit/test.h> #include <linux/rtc.h> /* * Advance a date by one day. */ static void advance_date(int *year, int *month, int *mday, int *yday) { if (*mday != rtc_month_days(*month - 1, *year)) { ++*mday; ++*yday; return; } *mday = 1; if (*month != 12) { ++*month; ++*yday; return; } *month = 1; *yday = 1; ++*year; } /* * Checks every day in a 160000 years interval starting on 1970-01-01 * against the expected result. */ static void rtc_time64_to_tm_test_date_range(struct kunit *test) { /* * 160000 years = (160000 / 400) * 400 years * = (160000 / 400) * 146097 days * = (160000 / 400) * 146097 * 86400 seconds */ time64_t total_secs = ((time64_t) 160000) / 400 * 146097 * 86400; int year = 1970; int month = 1; int mday = 1; int yday = 1; struct rtc_time result; time64_t secs; s64 days; for (secs = 0; secs <= total_secs; secs += 86400) { rtc_time64_to_tm(secs, &result); days = div_s64(secs, 86400); #define FAIL_MSG "%d/%02d/%02d (%2d) : %ld", \ year, month, mday, yday, days KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG); KUNIT_ASSERT_EQ_MSG(test, month - 1, result.tm_mon, FAIL_MSG); KUNIT_ASSERT_EQ_MSG(test, mday, result.tm_mday, FAIL_MSG); KUNIT_ASSERT_EQ_MSG(test, yday, result.tm_yday, FAIL_MSG); advance_date(&year, &month, &mday, &yday); } } static struct kunit_case rtc_lib_test_cases[] = { KUNIT_CASE(rtc_time64_to_tm_test_date_range), {} }; static struct kunit_suite rtc_lib_test_suite = { .name = "rtc_lib_test_cases", .test_cases = rtc_lib_test_cases, }; kunit_test_suite(rtc_lib_test_suite); MODULE_LICENSE("GPL");