static time_rep_type subtract_days(const time_rep_type& base, const date_duration_type& dd) { if(base.is_special() || dd.is_special()) { return(time_rep_type(base.get_rep() - dd.get_rep())); } else{ return time_rep_type(base.time_count() - (dd.days() * time_rep_type::frac_sec_per_day())); } }
template<class time_type> class c_local_adjustor { public: typedef typename time_type::time_duration_type time_duration_type; typedef typename time_type::date_type date_type; typedef typename date_type::duration_type date_duration_type; //! Convert a utc time to local time static time_type utc_to_local(const time_type& t) { date_type time_t_start_day(1970,1,1); time_type time_t_start_time(time_t_start_day,time_duration_type(0,0,0)); if (t < time_t_start_time) { boost::throw_exception(std::out_of_range("Cannot convert dates prior to Jan 1, 1970")); BOOST_DATE_TIME_UNREACHABLE_EXPRESSION(return time_t_start_time); // should never reach } date_duration_type dd = t.date() - time_t_start_day; time_duration_type td = t.time_of_day(); std::time_t t2 = dd.days()*86400 + td.hours()*3600 + td.minutes()*60 + td.seconds(); std::tm tms, *tms_ptr; tms_ptr = c_time::localtime(&t2, &tms); date_type d(static_cast<unsigned short>(tms_ptr->tm_year + 1900), static_cast<unsigned short>(tms_ptr->tm_mon + 1), static_cast<unsigned short>(tms_ptr->tm_mday)); time_duration_type td2(tms_ptr->tm_hour, tms_ptr->tm_min, tms_ptr->tm_sec, t.time_of_day().fractional_seconds()); return time_type(d,td2); } };
template<class time_type> class c_local_adjustor { public: typedef typename time_type::time_duration_type time_duration_type; typedef typename time_type::date_type date_type; typedef typename date_type::duration_type date_duration_type; //! Convert a utc time to local time static time_type utc_to_local(const time_type& t) { date_type time_t_start_day(1970,1,1); time_type time_t_start_time(time_t_start_day,time_duration_type(0,0,0)); if (t < time_t_start_time) { boost::throw_exception(std::out_of_range("Cannot convert dates prior to Jan 1, 1970")); BOOST_DATE_TIME_UNREACHABLE_EXPRESSION(return time_t_start_time); // should never reach } date_duration_type dd = t.date() - time_t_start_day; time_duration_type td = t.time_of_day(); uint64_t t2 = static_cast<uint64_t>(dd.days())*86400 + static_cast<uint64_t>(td.hours())*3600 + static_cast<uint64_t>(td.minutes())*60 + td.seconds(); // detect y2038 issue and throw instead of proceed with bad time std::time_t tv = boost::numeric_cast<std::time_t>(t2); std::tm tms, *tms_ptr; tms_ptr = c_time::localtime(&tv, &tms); date_type d(static_cast<unsigned short>(tms_ptr->tm_year + 1900), static_cast<unsigned short>(tms_ptr->tm_mon + 1), static_cast<unsigned short>(tms_ptr->tm_mday)); time_duration_type td2(tms_ptr->tm_hour, tms_ptr->tm_min, tms_ptr->tm_sec,
template<class time_type> class c_local_adjustor { public: typedef typename time_type::time_duration_type time_duration_type; typedef typename time_type::date_type date_type; typedef typename date_type::duration_type date_duration_type; //! Convert a utc time to local time static time_type utc_to_local(const time_type& t) { date_type time_t_start_day(1970,1,1); time_type time_t_start_time(time_t_start_day,time_duration_type(0,0,0)); if (t < time_t_start_time) { boost::throw_exception(std::out_of_range("Cannot convert dates prior to Jan 1, 1970")); BOOST_DATE_TIME_UNREACHABLE_EXPRESSION(return time_t_start_time); // should never reach } date_duration_type dd = t.date() - time_t_start_day; time_duration_type td = t.time_of_day(); std::time_t t2 = static_cast<std::time_t>(dd.days())*86400 + static_cast<std::time_t>(td.hours())*3600 + static_cast<std::time_t>(td.minutes())*60 + td.seconds(); std::tm tms, *tms_ptr; tms_ptr = c_time::localtime(&t2, &tms); date_type d(static_cast<unsigned short>(tms_ptr->tm_year + 1900), static_cast<unsigned short>(tms_ptr->tm_mon + 1), static_cast<unsigned short>(tms_ptr->tm_mday)); time_duration_type td2(tms_ptr->tm_hour, tms_ptr->tm_min, tms_ptr->tm_sec, t.time_of_day().fractional_seconds());