unix2yds.c

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#include <timeutils.h>
#include <genutils.h>
 
/* --------------------------------------------------------------- */
/* unix2yds() - converts secs since 1/1/70 to yr, day, secs of day */
/* --------------------------------------------------------------- */
void unix2yds(double usec, int16_t *year, int16_t *day, double *secs) {
    if (usec == BAD_FLT) {
        *year = BAD_INT;
        *day = BAD_INT;
        *secs = BAD_FLT;
    } else {
        struct tm *trec;
        time_t utime = (time_t) usec;
 
        trec = gmtime(&utime);
 
        *year = trec->tm_year + 1900;
        *day = trec->tm_yday + 1;
        *secs = trec->tm_hour * 3600.
                + trec->tm_min * 60.
                + trec->tm_sec
                + fmod(usec, 1.);
    }
}