1#ifndef DATE_TIME_TIME_CLOCK_HPP___
2#define DATE_TIME_TIME_CLOCK_HPP___
3
4/* Copyright (c) 2002,2003,2005 CrystalClear Software, Inc.
5 * Use, modification and distribution is subject to the
6 * Boost Software License, Version 1.0. (See accompanying
7 * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
8 * Author: Jeff Garland, Bart Garst
9 * $Date$
10 */
11
12/*! @file time_clock.hpp
13 This file contains the interface for clock devices.
14*/
15
16#include "boost/date_time/c_time.hpp"
17#include "boost/shared_ptr.hpp"
18
19namespace boost {
20namespace date_time {
21
22
23 //! A clock providing time level services based on C time_t capabilities
24 /*! This clock provides resolution to the 1 second level
25 */
26 template<class time_type>
27 class second_clock
28 {
29 public:
30 typedef typename time_type::date_type date_type;
31 typedef typename time_type::time_duration_type time_duration_type;
32
33 static time_type local_time()
34 {
35 ::std::time_t t;
36 ::std::time(timer: &t);
37 ::std::tm curr, *curr_ptr;
38 //curr_ptr = ::std::localtime(&t);
39 curr_ptr = c_time::localtime(t: &t, result: &curr);
40 return create_time(current: curr_ptr);
41 }
42
43
44 //! Get the current day in universal date as a ymd_type
45 static time_type universal_time()
46 {
47
48 ::std::time_t t;
49 ::std::time(timer: &t);
50 ::std::tm curr, *curr_ptr;
51 //curr_ptr = ::std::gmtime(&t);
52 curr_ptr = c_time::gmtime(t: &t, result: &curr);
53 return create_time(current: curr_ptr);
54 }
55
56 template<class time_zone_type>
57 static time_type local_time(boost::shared_ptr<time_zone_type> tz_ptr)
58 {
59 typedef typename time_type::utc_time_type utc_time_type;
60 utc_time_type utc_time = second_clock<utc_time_type>::universal_time();
61 return time_type(utc_time, tz_ptr);
62 }
63
64
65 private:
66 static time_type create_time(::std::tm* current)
67 {
68 date_type d(static_cast<unsigned short>(current->tm_year + 1900),
69 static_cast<unsigned short>(current->tm_mon + 1),
70 static_cast<unsigned short>(current->tm_mday));
71 time_duration_type td(current->tm_hour,
72 current->tm_min,
73 current->tm_sec);
74 return time_type(d,td);
75 }
76
77 };
78
79
80} } //namespace date_time
81
82
83#endif
84

source code of boost/boost/date_time/time_clock.hpp