boost/date_time/date_clock_device.hpp
#ifndef DATE_CLOCK_DEVICE_HPP___ #define DATE_CLOCK_DEVICE_HPP___ /* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc. * Use, modification and distribution is subject to the * Boost Software License, Version 1.0. (See accompanying * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) * Author: Jeff Garland, Bart Garst * $Date$ */ #include "boost/date_time/c_time.hpp" namespace boost { namespace date_time { //! A clock providing day level services based on C time_t capabilities /*! This clock uses Posix interfaces as its implementation and hence * uses the timezone settings of the operating system. Incorrect * user settings will result in incorrect results for the calls * to local_day. */ template<class date_type> class day_clock { public: typedef typename date_type::ymd_type ymd_type; //! Get the local day as a date type static date_type local_day() { return date_type(local_day_ymd()); } //! Get the local day as a ymd_type static typename date_type::ymd_type local_day_ymd() { ::std::tm result; ::std::tm* curr = get_local_time(result); return ymd_type(static_cast<unsigned short>(curr->tm_year + 1900), static_cast<unsigned short>(curr->tm_mon + 1), static_cast<unsigned short>(curr->tm_mday)); } //! Get the current day in universal date as a ymd_type static typename date_type::ymd_type universal_day_ymd() { ::std::tm result; ::std::tm* curr = get_universal_time(result); return ymd_type(static_cast<unsigned short>(curr->tm_year + 1900), static_cast<unsigned short>(curr->tm_mon + 1), static_cast<unsigned short>(curr->tm_mday)); } //! Get the UTC day as a date type static date_type universal_day() { return date_type(universal_day_ymd()); } private: static ::std::tm* get_local_time(std::tm& result) { ::std::time_t t; ::std::time(&t); return c_time::localtime(&t, &result); } static ::std::tm* get_universal_time(std::tm& result) { ::std::time_t t; ::std::time(&t); return c_time::gmtime(&t, &result); } }; } } //namespace date_time #endif