/* Test that valid POSIX timezone strings are correctly parsed by tzset(3). */ #include #include // BEGIN test vectors #include #include #define IN_SECONDS(h, m, s) ((h) * 3600 + (m) * 60 + (s)) #define NO_TIME INT_MIN struct tz_test { const char* tzstr; int offset_seconds; int dst_offset_seconds; }; extern struct tm winter_tm; extern struct tm summer_tm; extern const time_t winter_time; extern const time_t summer_time; extern struct tz_test test_timezones[]; // winter time is March, 21st 2022 at 8:15pm and 20 seconds struct tm winter_tm = { .tm_sec = 20, .tm_min = 15, .tm_hour = 20, .tm_mday = 21, .tm_mon = 3 - 1, .tm_year = 2022 - 1900, .tm_isdst = 0 }; // summer time is July, 15th 2022 at 10:50am and 40 seconds struct tm summer_tm = { .tm_sec = 40, .tm_min = 50, .tm_hour = 10, .tm_mday = 15, .tm_mon = 7 - 1, .tm_year = 2022 - 1900, .tm_isdst = 1 }; // UTC unix time for the winter time const time_t winter_time = 1647893720; const time_t summer_time = 1657882240; struct tz_test test_timezones[] = { /* * creating test vectors based on the POSIX spec (https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03) */ // normal std names {"MAR1", IN_SECONDS(1, 0, 0), NO_TIME}, {"MAR-1", -IN_SECONDS(1, 0, 0), NO_TIME}, {"MAR+2", IN_SECONDS(2, 0, 0), NO_TIME}, {"MAR7", IN_SECONDS(7, 0, 0), NO_TIME}, {"MAR-7", -IN_SECONDS(7, 0, 0), NO_TIME}, {"MARS5", IN_SECONDS(5, 0, 0), NO_TIME}, {"MARSM5", IN_SECONDS(5, 0, 0), NO_TIME}, {"MARSMOON5", IN_SECONDS(5, 0, 0), NO_TIME}, // assuming TZNAME_MAX >= 8 {"MARS5:23:42", IN_SECONDS(5, 23, 42), NO_TIME}, {"SUN-7:14:24", -IN_SECONDS(7, 14, 24), NO_TIME}, // with DST {"MAR5SMAR", IN_SECONDS(5, 0, 0), IN_SECONDS(4, 0, 0)}, // only DST name {"MAR5SMAR2", IN_SECONDS(5, 0, 0), IN_SECONDS(2, 0, 0)}, // DST name with offset {"MAR3SMAR-3", IN_SECONDS(3, 0, 0), -IN_SECONDS(3, 0, 0)}, {"MARSWINTER4MARSUMMER", IN_SECONDS(4, 0, 0), IN_SECONDS(3, 0, 0)}, {"MARSWINTER4MARSUMMER3", IN_SECONDS(4, 0, 0), IN_SECONDS(3, 0, 0)}, // with DST IN_SECONDSs {"WMARS3SMARS,J80", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"WMARS3SMARS,J80,J134", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"WMARS3SMARS,79", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"WMARS3SMARS,76,134", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"WMARS3SMARS,76/02,134/03", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"WMARS3SMARS,76/02:15:45,134/03:40:20", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"WMARS3SMARS,M3.4.1/02:15:45,M8.3.1/03:40:20", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, // special std names {"-1", -IN_SECONDS(1, 0, 0), NO_TIME}, {"-2", -IN_SECONDS(2, 0, 0), NO_TIME}, // require TZNAME_MAX >= 7 + 1 {"<003>3", IN_SECONDS(3, 0, 0), NO_TIME}, {"<+04>4", IN_SECONDS(4, 0, 0), NO_TIME}, {"<-05>-5", -IN_SECONDS(5, 0, 0), NO_TIME}, {"6", IN_SECONDS(6, 0, 0), NO_TIME}, {"<+A5>-7", -IN_SECONDS(7, 0, 0), NO_TIME}, {"<0123456>8", IN_SECONDS(8, 0, 0), NO_TIME}, {"<0A1B2C3>9", IN_SECONDS(9, 0, 0), NO_TIME}, {"-45", -IN_SECONDS(4, 0, 0), IN_SECONDS(5, 0, 0)}, {"3", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"32", IN_SECONDS(3, 0, 0), IN_SECONDS(2, 0, 0)}, {"3:152:30:15", IN_SECONDS(3, 15, 0), IN_SECONDS(2, 30, 15)}, {"3:152:30:15", IN_SECONDS(3, 15, 0), IN_SECONDS(2, 30, 15)}, // requires TZNAME_MAX >= 8 + 1 {"<+H6M20S12>6:20:12<-H4M40S14>-4:40:14", IN_SECONDS(6, 20, 12), -IN_SECONDS(4, 40, 14)}, // requires TZNAME_MAX >= 9 + 1 {"<+0123456789ABCDEF>3:33:33", IN_SECONDS(3, 33, 33), NO_TIME}, // truncates the name (17 + 1) /* * real-world test vectors. * IN_SECONDSzones extracted from the tzdb (https://github.com/eggert/tz#2019e). * The IN_SECONDSzone strings can also be obtained from https://raw.githubusercontent.com/nayarsystems/posix_tz_db/master/zones.csv. */ { /* Etc/GMT-14 */ "<+14>-14", -IN_SECONDS(14, 0, 0), NO_TIME}, { /* Etc/GMT+12 */ "<-12>12", IN_SECONDS(12, 0, 0), NO_TIME}, { /* Africa/Casablanca */ "<+01>-1", -IN_SECONDS(1, 0, 0), NO_TIME}, { /* America/Araguaina */ "<-03>3", IN_SECONDS(3, 0, 0), NO_TIME}, { /* America/Asuncion */ "<-04>4<-03>,M10.1.0/0,M3.4.0/0", IN_SECONDS(4, 0, 0), IN_SECONDS(3, 0, 0)}, { /* America/Los_Angeles */ "PST8PDT,M3.2.0,M11.1.0", IN_SECONDS(8, 0, 0), IN_SECONDS(7, 0, 0)}, { /* America/New_York */ "EST5EDT,M3.2.0,M11.1.0", IN_SECONDS(5, 0, 0), IN_SECONDS(4, 0, 0)}, { /* America/Scoresbysund */ "<-01>1<+00>,M3.5.0/0,M10.5.0/1", IN_SECONDS(1, 0, 0), IN_SECONDS(0, 0, 0)}, { /* Asia/Colombo */ "<+0530>-5:30", -IN_SECONDS(5, 30, 0), NO_TIME}, { /* Europe/Berlin */ "CET-1CEST,M3.5.0,M10.5.0/3", -IN_SECONDS(1, 0, 0), -IN_SECONDS(2, 0, 0)}, // END of list {NULL, NO_TIME, NO_TIME} }; // helper macros #define FOR_TIMEZONES(iter_name) for (struct tz_test* iter_name = test_timezones; iter_name->tzstr != NULL; ++iter_name) // END test vectors static int failed = 0; #define TEST_ASSERT_EQUAL_INT_MESSAGE(...) assert_equal(__VA_ARGS__) void assert_equal(int lhs, int rhs, const char* msg) { if (lhs != rhs) { printf("Assertion failed! Expected %d to equal %d. %s\n", lhs, rhs, msg); ++failed; } } void test_TimezoneStrings(void) { char buffer[128]; FOR_TIMEZONES(ptr) { setenv("TZ", ptr->tzstr, 1); tzset(); snprintf(buffer, 128, "winter time, timezone = \"%s\"", ptr->tzstr); struct tm winter_tm_copy = winter_tm; // copy TEST_ASSERT_EQUAL_INT_MESSAGE(winter_time + ptr->offset_seconds, mktime(&winter_tm_copy), buffer); if (ptr->dst_offset_seconds != NO_TIME) { snprintf(buffer, 128, "summer time, timezone = \"%s\"", ptr->tzstr); struct tm summer_tm_copy = summer_tm; // copy TEST_ASSERT_EQUAL_INT_MESSAGE(summer_time + ptr->dst_offset_seconds, mktime(&summer_tm_copy), buffer); } } } int main() { test_TimezoneStrings(); exit (failed); }