时间类型结构体

//UTC时间信息__packed typedef struct {uint16_t year;//年份uint8_t month;//月份uint8_t date;//日期uint8_t hour; //小时uint8_t min; //分钟uint8_t sec; //秒钟}nmea_time;

UTC时间转任意时区时间

void UTC_to_BJtime(nmea_time*utc_time, int8_ttimezone){int year,month,day,hour;int lastday = 0;//last day of this monthint lastlastday = 0;//last day of last monthyear = utc_time->year; //utc timemonth = utc_time->month;day = utc_time->date;hour = utc_time->hour + timezone; if(month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12){lastday = 31;if(month == 3){if((year%400 == 0)||(year%4 == 0 && year%100 != 0))//if this is lunar yearlastlastday = 29;elselastlastday = 28;}if(month == 8)lastlastday = 31;}else if(month == 4 || month == 6 || month == 9 || month == 11){lastday = 30;lastlastday = 31;}else{lastlastday = 31;if((year%400 == 0)||(year%4 == 0 && year%100 != 0))lastday = 29;elselastday = 28;}if(hour >= 24){// if >24, day+1hour -= 24;day += 1; if(day > lastday){// next month, day-lastday of this monthday -= lastday;month += 1;if(month > 12){//next year , month-12month -= 12;year += 1;}}}if(hour < 0){// if <0, day-1hour += 24;day -= 1; if(day < 1){// month-1, day=last day of last monthday = lastlastday;month -= 1;if(month < 1){// last year , month=12month = 12;year -= 1;}}}// transfer value to NMEA_result.local_timeNMEA_result.local_time.year = year;NMEA_result.local_time.month = month;NMEA_result.local_time.date = day;NMEA_result.local_time.hour = hour;NMEA_result.local_time.min = utc_time->min;NMEA_result.local_time.sec = utc_time->sec;}