/* Special Conformance Test 20.2.0.1: Verification of time, asctime, ctime, */ /* localtime, gmtime, mktime, difftime */ /* */ /* The tester needs to verify that the printed time is accurate for the */ /* current clock setting of machine. */ #include #include main () { time_t secondTime, theTime, *tptr = &theTime; char *timeString; struct tm *TM; double d; theTime = time (tptr); /* call time to get current date & time */ if (theTime == -1) /* represented as an integral type */ goto Fail; if (theTime != *tptr) goto Fail; /* Call ctime to get current date/time in the form: */ /* Day Mon 99 99:99:99 yyyy\n\0 where Day = day of week; Mon = month; */ /* 99 = day of month; 99:99:99 = current hour:min:sec; yyyy = current year */ timeString = ctime (tptr); printf ("The current date/time is: %s\n", timeString); /* Call localtime and gmtime and then echo the fields to the screen. */ TM = localtime (tptr); if (TM == NULL) goto Fail; printf ("localtime is:\n"); printf ("sec = %d min = %d hour = %d day = %d month = %d year = %d\n", TM->tm_sec, TM->tm_min, TM->tm_hour, TM->tm_mday, TM->tm_mon, TM->tm_year); printf ("day of week = %d day of year = %d not daylight savings = %d\n\n", TM->tm_wday, TM->tm_yday, TM->tm_isdst); TM = gmtime (tptr); if (TM == NULL) goto Fail; printf ("gmtime is:\n"); printf ("sec = %d min = %d hour = %d day = %d month = %d year = %d\n", TM->tm_sec, TM->tm_min, TM->tm_hour, TM->tm_mday, TM->tm_mon, TM->tm_year); printf ("day of week = %d day of year = %d not daylight savings = %d\n\n", TM->tm_wday, TM->tm_yday, TM->tm_isdst); /* Test mktime: should return original time as returned by time. */ secondTime = mktime (TM); if (secondTime != theTime) goto Fail; /* Test asctime: should return same time as returned by ctime. */ timeString = asctime (TM); printf ("The current date/time is: %s\n", timeString); /* Test difftime. Value returned should be zero. */ d = difftime (theTime, secondTime); if (d != 0.0) goto Fail; return; Fail: printf ("Call to a time function in spc20.2.0.1\n"); }