added TimeZone(time_t xxx, timezone);

Usage:  
time_t localtime;
localtime = TimeZone(UnixTime, 8);   // Beijing timezone = 8

Author: csnol

STM32F1/libraries/RTClock/src/RTClock.h

@@ -72,6 +72,8 @@ class RTClock {
 	uint8_t second(time_t t)  { breakTime(t, tmm); return tmm.second; }
 	uint8_t isPM(time_t t)    { return (hour(t)>=12); }
 
+	time_t TimeZone(time_t t, uint8_t TZ)  { return ( t - (TZ * SECS_PER_HOUR)); }    // usage: localtime = TimeZone(UnixTime, 8); // Beijing timezone = 8  
+	
 	void createAlarm(voidFuncPtr function, time_t alarm_time_t); 
 	void createAlarm(voidFuncPtr function, struct tm_t & alarm_tm);