#include <stdlib.h> #include <stdio.h> #include <time.h> /* We use this instead of memcmp because some broken C libraries * add additional nonstandard fields to struct tm... */ int tm_cmp(struct tm tm1, struct tm tm2) { return tm1.tm_sec != tm2.tm_sec || tm1.tm_min != tm2.tm_min || tm1.tm_hour != tm2.tm_hour || tm1.tm_mday != tm2.tm_mday || tm1.tm_mon != tm2.tm_mon || tm1.tm_year != tm2.tm_year || tm1.tm_wday != tm2.tm_wday || tm1.tm_yday != tm2.tm_yday || tm1.tm_isdst!= tm2.tm_isdst; } char *tm_str(struct tm tm) { static int i; static char b[4][64]; i = (i+1)%4; snprintf(b[i], sizeof b[i], "s=%.2d m=%.2d h=%.2d mday=%.2d mon=%.2d year=%.4d wday=%d yday=%d isdst=%d", tm.tm_sec, tm.tm_min, tm.tm_hour, tm.tm_mday, tm.tm_mon, tm.tm_year, tm.tm_wday, tm.tm_yday, tm.tm_isdst); return b[i]; } #define TM(ss,mm,hh,md,mo,yr,wd,yd,dst) (struct tm){ \ .tm_sec = ss, .tm_min = mm, .tm_hour = hh, \ .tm_mday = md, .tm_mon = mo, .tm_year = yr, \ .tm_wday = wd, .tm_yday = yd, .tm_isdst = dst } #define TM_EPOCH TM(0,0,0,1,0,70,4,0,0) #define TM_Y2038_1S TM(7,14,3,19,0,138,2,18,0) #define TM_Y2038 TM(8,14,3,19,0,138,2,18,0) #define TEST_TM(r,x,m) (!tm_cmp((r),(x)) || \ (printf(__FILE__ ":%d: %s failed:\n\tresult: %s\n\texpect: %s\n", __LINE__, \ m, tm_str((r)), tm_str((x))), err++, 0) ) #define TEST(r, f, x, m) ( \ ((r) = (f)) == (x) || \ (printf(__FILE__ ":%d: %s failed (" m ")\n", __LINE__, #f, r, x), err++, 0) ) int main(void) { struct tm tm, *tm_p; time_t t; int err=0; putenv("TZ=GMT"); tzset(); t=0; tm_p = gmtime(&t); TEST_TM(*tm_p, TM_EPOCH, "gmtime(0)"); tm = TM_Y2038_1S; t = mktime(&tm); tm = *(gmtime(&t)); TEST_TM(*tm_p, TM_Y2038_1S, "mktime/gmtime(Y2038-1)"); tm = TM_Y2038; t = mktime(&tm); tm = *(gmtime(&t)); TEST_TM(*tm_p, TM_Y2038, "mktime/gmtime(Y2038)"); /* FIXME: set a TZ var and check DST boundary conditions */ return err; }