2 Copyright (C) 2014-2019 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 libdcp is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with libdcp. If not, see <http://www.gnu.org/licenses/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
34 /** @file src/local_time.cc
35 * @brief LocalTime class.
38 #include "local_time.h"
39 #include "exceptions.h"
40 #include "dcp_assert.h"
41 #include <boost/lexical_cast.hpp>
42 #include <boost/date_time/c_local_time_adjustor.hpp>
47 using boost::lexical_cast;
50 /** Construct a LocalTime from the current time */
51 LocalTime::LocalTime ()
53 time_t now = time (0);
54 struct tm* tm = localtime (&now);
56 _year = tm->tm_year + 1900;
57 _month = tm->tm_mon + 1;
64 set_local_time_zone ();
67 /** Construct a LocalTime from a boost::posix_time::ptime using the local
70 LocalTime::LocalTime (boost::posix_time::ptime t)
72 _year = t.date().year ();
73 _month = t.date().month ();
74 _day = t.date().day ();
75 _hour = t.time_of_day().hours ();
76 _minute = t.time_of_day().minutes ();
77 _second = t.time_of_day().seconds ();
78 _millisecond = t.time_of_day().fractional_seconds () / 1000;
79 DCP_ASSERT (_millisecond < 1000);
81 set_local_time_zone ();
84 /** Construct a LocalTime from a boost::posix_time::ptime and a time zone offset.
85 * @param tz_minute Offset from UTC in minutes; if the timezone is behind UTC this may be negative,
86 * e.g. -04:30 would have tz_hour=-1 and tz_minute=-30.
88 LocalTime::LocalTime (boost::posix_time::ptime t, int tz_hour, int tz_minute)
90 _year = t.date().year ();
91 _month = t.date().month ();
92 _day = t.date().day ();
93 _hour = t.time_of_day().hours ();
94 _minute = t.time_of_day().minutes ();
95 _second = t.time_of_day().seconds ();
96 _millisecond = t.time_of_day().fractional_seconds () / 1000;
97 DCP_ASSERT (_millisecond < 1000);
100 _tz_minute = tz_minute;
103 /** Set our UTC offset to be according to the local time zone */
105 LocalTime::set_local_time_zone ()
107 boost::posix_time::ptime const utc_now = boost::posix_time::second_clock::universal_time ();
108 boost::posix_time::ptime const now = boost::date_time::c_local_adjustor<boost::posix_time::ptime>::utc_to_local (utc_now);
109 boost::posix_time::time_duration offset = now - utc_now;
111 _tz_hour = offset.hours ();
112 _tz_minute = offset.minutes ();
115 /** @param s A string of the form 2013-01-05T18:06:59[.123][+04:00] */
116 LocalTime::LocalTime (string s)
118 /* 2013-01-05T18:06:59 or 2013-01-05T18:06:59.123 or 2013-01-05T18:06:59+04:00 or 2013-01-05T18:06:59.123+04:00 */
119 /* 0123456789012345678 or 01234567890123456789012 or 0123456789012345678901234 or 01234567890123456789012345678 */
121 if (s.length() < 19) {
122 throw TimeFormatError (s);
125 bool with_millisecond = false;
126 bool with_tz = false;
128 switch (s.length ()) {
132 with_millisecond = true;
138 with_millisecond = with_tz = true;
141 throw TimeFormatError (s);
144 int const tz_pos = with_millisecond ? 23 : 19;
146 /* Check incidental characters */
147 if (s[4] != '-' || s[7] != '-' || s[10] != 'T' || s[13] != ':' || s[16] != ':') {
148 throw TimeFormatError (s);
150 if (with_millisecond && s[19] != '.') {
151 throw TimeFormatError (s);
153 if (with_tz && s[tz_pos] != '+' && s[tz_pos] != '-') {
154 throw TimeFormatError (s);
157 _year = lexical_cast<int> (s.substr (0, 4));
158 _month = lexical_cast<int> (s.substr (5, 2));
159 _day = lexical_cast<int> (s.substr (8, 2));
160 _hour = lexical_cast<int> (s.substr (11, 2));
161 _minute = lexical_cast<int> (s.substr (14, 2));
162 _second = lexical_cast<int> (s.substr (17, 2));
163 _millisecond = with_millisecond ? lexical_cast<int> (s.substr (20, 3)) : 0;
164 _tz_hour = with_tz ? lexical_cast<int> (s.substr (tz_pos + 1, 2)) : 0;
165 _tz_minute = with_tz ? lexical_cast<int> (s.substr (tz_pos + 4, 2)) : 0;
167 if (with_tz && s[tz_pos] == '-') {
168 _tz_hour = -_tz_hour;
169 _tz_minute = -_tz_minute;
173 /** @return A string of the form 2013-01-05T18:06:59+04:00 or 2013-01-05T18:06:59.123+04:00 */
175 LocalTime::as_string (bool with_millisecond) const
179 buffer, sizeof (buffer),
181 date().c_str(), time_of_day(true, with_millisecond).c_str(), (_tz_hour >= 0 ? "+" : "-"), abs (_tz_hour), abs(_tz_minute)
186 /** @return The date in the form YYYY-MM-DD */
188 LocalTime::date () const
191 snprintf (buffer, sizeof (buffer), "%04d-%02d-%02d", _year, _month, _day);
195 /** @return The time in the form HH:MM:SS or HH:MM:SS.mmm */
197 LocalTime::time_of_day (bool with_second, bool with_millisecond) const
200 DCP_ASSERT(!(with_millisecond && !with_second));
201 if (with_millisecond) {
202 snprintf (buffer, sizeof (buffer), "%02d:%02d:%02d.%03d", _hour, _minute, _second, _millisecond);
203 } else if (with_second) {
204 snprintf (buffer, sizeof (buffer), "%02d:%02d:%02d", _hour, _minute, _second);
206 snprintf (buffer, sizeof (buffer), "%02d:%02d", _hour, _minute);
212 LocalTime::operator== (LocalTime const & other) const
214 return _year == other._year && _month == other._month && _day == other._day &&
215 _hour == other._hour && _second == other._second && _millisecond == other._millisecond &&
216 _tz_hour == other._tz_hour && _tz_minute == other._tz_minute;
220 LocalTime::operator< (LocalTime const & other) const
222 if (_year != other._year) {
223 return _year < other._year;
225 if (_month != other._month) {
226 return _month < other._month;
228 if (_day != other._day) {
229 return _day < other._day;
231 if (_hour != other._hour) {
232 return _hour < other._hour;
234 if (_second != other._second) {
235 return _second < other._second;
237 return _millisecond < other._millisecond;
241 LocalTime::operator!= (LocalTime const & other) const
243 return !(*this == other);
247 dcp::operator<< (ostream& s, LocalTime const & t)