[td-225] fix bugs in parse time

src/common/src/ttimezone.c

@@ -20,6 +20,7 @@
 #include "tconfig.h"
 #include "tutil.h"
 
+// TODO refactor to set the tz value through parameter
 void tsSetTimeZone() {
   SGlobalCfg *cfg_timezone = taosGetConfigOption("timezone");
   uPrint("timezone is set to %s by %s", tsTimezone, tsCfgStatusStr[cfg_timezone->cfgStatus]);

src/util/src/ttime.c

@@ -56,11 +56,9 @@ int64_t user_mktime64(const unsigned int year0, const unsigned int mon0,
     year -= 1;
   }
 
-  //int64_t res = (((((int64_t) (year/4 - year/100 + year/400 + 367*mon/12 + day) +
-	//	  year*365 - 719499)*24 + hour)*60 + min)*60 + sec);
-  int64_t res;
-  res  = 367*((int64_t)mon)/12;
-  res += year/4 - year/100 + year/400 + day + year*365 - 719499;
+  int64_t res = 367*((int64_t)mon)/12;
+
+  res += ((int64_t)(year/4 - year/100 + year/400 + day + year*365) - 719499);  // this value may be less than 0
   res  = res*24;
   res  = ((res + hour) * 60 + min) * 60 + sec;