Chris@16: #ifndef POSIX_TIME_CONVERSION_HPP___
Chris@16: #define POSIX_TIME_CONVERSION_HPP___
Chris@16: 
Chris@16: /* Copyright (c) 2002-2005 CrystalClear Software, Inc.
Chris@16:  * Use, modification and distribution is subject to the
Chris@16:  * Boost Software License, Version 1.0. (See accompanying
Chris@16:  * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  * Author: Jeff Garland, Bart Garst
Chris@101:  * $Date$
Chris@16:  */
Chris@16: 
Chris@16: #include <cstring>
Chris@16: #include <boost/date_time/posix_time/ptime.hpp>
Chris@16: #include <boost/date_time/posix_time/posix_time_duration.hpp>
Chris@16: #include <boost/date_time/filetime_functions.hpp>
Chris@16: #include <boost/date_time/c_time.hpp>
Chris@16: #include <boost/date_time/time_resolution_traits.hpp> // absolute_value
Chris@16: #include <boost/date_time/gregorian/conversion.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: namespace posix_time {
Chris@16: 
Chris@16: 
Chris@16:   //! Function that converts a time_t into a ptime.
Chris@16:   inline
Chris@16:   ptime from_time_t(std::time_t t)
Chris@16:   {
Chris@16:     ptime start(gregorian::date(1970,1,1));
Chris@16:     return start + seconds(static_cast<long>(t));
Chris@16:   }
Chris@16: 
Chris@101:   //! Function that converts a ptime into a time_t
Chris@101:   inline
Chris@101:   std::time_t to_time_t(ptime pt)
Chris@101:   {
Chris@101:     time_duration dur = pt - ptime(gregorian::date(1970,1,1));
Chris@101:     return std::time_t(dur.total_seconds());
Chris@101:   }
Chris@101: 
Chris@16:   //! Convert a time to a tm structure truncating any fractional seconds
Chris@16:   inline
Chris@16:   std::tm to_tm(const boost::posix_time::ptime& t) {
Chris@16:     std::tm timetm = boost::gregorian::to_tm(t.date());
Chris@16:     boost::posix_time::time_duration td = t.time_of_day();
Chris@16:     timetm.tm_hour = td.hours();
Chris@16:     timetm.tm_min = td.minutes();
Chris@16:     timetm.tm_sec = td.seconds();
Chris@16:     timetm.tm_isdst = -1; // -1 used when dst info is unknown
Chris@16:     return timetm;
Chris@16:   }
Chris@16:   //! Convert a time_duration to a tm structure truncating any fractional seconds and zeroing fields for date components
Chris@16:   inline
Chris@16:   std::tm to_tm(const boost::posix_time::time_duration& td) {
Chris@16:     std::tm timetm;
Chris@16:     std::memset(&timetm, 0, sizeof(timetm));
Chris@16:     timetm.tm_hour = date_time::absolute_value(td.hours());
Chris@16:     timetm.tm_min = date_time::absolute_value(td.minutes());
Chris@16:     timetm.tm_sec = date_time::absolute_value(td.seconds());
Chris@16:     timetm.tm_isdst = -1; // -1 used when dst info is unknown
Chris@16:     return timetm;
Chris@16:   }
Chris@16: 
Chris@16:   //! Convert a tm struct to a ptime ignoring is_dst flag
Chris@16:   inline
Chris@16:   ptime ptime_from_tm(const std::tm& timetm) {
Chris@16:     boost::gregorian::date d = boost::gregorian::date_from_tm(timetm);
Chris@16:     return ptime(d, time_duration(timetm.tm_hour, timetm.tm_min, timetm.tm_sec));
Chris@16:   }
Chris@16: 
Chris@16: 
Chris@16: #if defined(BOOST_HAS_FTIME)
Chris@16: 
Chris@16:   //! Function to create a time object from an initialized FILETIME struct.
Chris@16:   /*! Function to create a time object from an initialized FILETIME struct.
Chris@16:    * A FILETIME struct holds 100-nanosecond units (0.0000001). When
Chris@16:    * built with microsecond resolution the FILETIME's sub second value
Chris@16:    * will be truncated. Nanosecond resolution has no truncation.
Chris@16:    *
Chris@16:    * \note FILETIME is part of the Win32 API, so it is not portable to non-windows
Chris@16:    * platforms.
Chris@16:    *
Chris@16:    * \note The function is templated on the FILETIME type, so that
Chris@16:    *       it can be used with both native FILETIME and the ad-hoc
Chris@16:    *       boost::date_time::winapi::file_time type.
Chris@16:    */
Chris@16:   template< typename TimeT, typename FileTimeT >
Chris@16:   inline
Chris@16:   TimeT from_ftime(const FileTimeT& ft)
Chris@16:   {
Chris@16:     return boost::date_time::time_from_ftime<TimeT>(ft);
Chris@16:   }
Chris@16: 
Chris@16: #endif // BOOST_HAS_FTIME
Chris@16: 
Chris@16: } } //namespace boost::posix_time
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #endif
Chris@16: