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