Method update_tm

inst/include/Rcpp/date_datetime/Date.h:126–134

update m_tm based on m_d

        // update m_tm based on m_d
        void update_tm() {
            if (R_FINITE(m_d)) {
                time_t t = static_cast<time_t>(24*60*60 * m_d);      // (fractional) days since epoch to seconds since epoch
                m_tm = *gmtime_(&t);
            } else {
                m_tm.tm_sec = m_tm.tm_min = m_tm.tm_hour = m_tm.tm_isdst = NA_INTEGER;
                m_tm.tm_min = m_tm.tm_hour = m_tm.tm_mday = m_tm.tm_mon  = m_tm.tm_year = NA_INTEGER;
            }
        }

    };