From a9baddd7d07b9fe15e212985a808a79773ec72e4 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 19 Mar 2011 22:26:06 -0400 Subject: initial check-in, taken from old libc svn repo with significant additions --- time.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 time.c (limited to 'time.c') diff --git a/time.c b/time.c new file mode 100644 index 0000000..c722755 --- /dev/null +++ b/time.c @@ -0,0 +1,76 @@ +#include +#include +#include + +/* 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=%02d m=%02d h=%02d mday=%02d mon=%02d year=%04d 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 test_time(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; +} -- cgit v1.2.1