LZY\79495
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
#include "get_utc_time.h"
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gtime_t epoch2time(const double *ep)
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{
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const int doy[] = {1,32,60,91,121,152,182,213,244,274,305,335};
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gtime_t time={0};
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int days, sec, year=(int)ep[0], mon=(int)ep[1], day=(int)ep[2];
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if (year<1970||2099<year||mon<1||12<mon)
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return time;
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/* leap year if year%4==0 in 1901-2099 */
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days=(year-1970)*365+(year-1969)/4+doy[mon-1]+day-2+(year%4==0&&mon>=3?1:0); //2´ú±íÇ°Ò»Ìì
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sec=(int)floor(ep[5]);
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time.time=(time_t)days*86400+(int)ep[3]*3600+(int)ep[4]*60+sec;
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time.sec=ep[5]-sec;
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return time;
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}
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gtime_t gpst2time(int week, double sec)
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{
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gtime_t t=epoch2time(gpst0);
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if (sec<-1E9||1E9<sec) sec=0.0;
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t.time+=86400*7*week+(int)sec;
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t.sec=sec-(int)sec;
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return t;
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}
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gtime_t timeadd(gtime_t t,double sec)
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{
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double tt;
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t.sec+=sec;tt=floor(t.sec);t.time+=(int)tt;t.sec-=tt;
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return t;
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}
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gtime_t GPSTime2UTCTime(int week,double sec,double leapsec)
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{
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gtime_t gpst=gpst2time(week,sec);
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return timeadd(gpst,-leapsec);
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}
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uint16_t get_utc_time(uint16_t GPSweek)
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{
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gtime_t GPSTime;
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struct tm * gpstimeinfo;
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GPSTime = GPSTime2UTCTime(GPSweek, 0, LEAPS);
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gpstimeinfo = gmtime(&GPSTime.time);
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double year = gpstimeinfo->tm_year + 1900;
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double month = gpstimeinfo->tm_mon + 1;
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return year;
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}
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uint16_t get_utc_year(uint16_t GPSweek)
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{
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gtime_t GPSTime;
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struct tm * gpstimeinfo;
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GPSTime = GPSTime2UTCTime(GPSweek, 0, LEAPS);
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gpstimeinfo = gmtime(&GPSTime.time);
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double year = gpstimeinfo->tm_year + 1900;
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return year;
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}
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uint8_t get_utc_month(uint16_t GPSweek)
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{
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gtime_t GPSTime;
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struct tm * gpstimeinfo;
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GPSTime = GPSTime2UTCTime(GPSweek, 0, LEAPS);
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gpstimeinfo = gmtime(&GPSTime.time);
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double year = gpstimeinfo->tm_year + 1900;
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double month = gpstimeinfo->tm_mon + 1;
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return month;
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}
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