2 Copyright (C) 2014 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 LocalTime::LocalTime (boost::posix_time::ptime t, int tz_hour, int tz_minute)
87 _year = t.date().year ();
88 _month = t.date().month ();
89 _day = t.date().day ();
90 _hour = t.time_of_day().hours ();
91 _minute = t.time_of_day().minutes ();
92 _second = t.time_of_day().seconds ();
93 _millisecond = t.time_of_day().fractional_seconds () / 1000;
94 DCP_ASSERT (_millisecond < 1000);
97 _tz_minute = tz_minute;
100 /** Set our UTC offset to be according to the local time zone */
102 LocalTime::set_local_time_zone ()
104 boost::posix_time::ptime const utc_now = boost::posix_time::second_clock::universal_time ();
105 boost::posix_time::ptime const now = boost::date_time::c_local_adjustor<boost::posix_time::ptime>::utc_to_local (utc_now);
106 boost::posix_time::time_duration offset = now - utc_now;
108 _tz_hour = offset.hours ();
109 _tz_minute = offset.minutes ();
112 /** @param s A string of the form 2013-01-05T18:06:59[.123]+04:00 */
113 LocalTime::LocalTime (string s)
115 /* 2013-01-05T18:06:59+04:00 or 2013-01-05T18:06:59.123+04:00 */
116 /* 0123456789012345678901234 or 01234567890123456789012345678 */
118 if (s.length() < 25) {
119 throw TimeFormatError (s);
122 /* Check incidental characters */
123 bool const common = s[4] == '-' && s[7] == '-' && s[10] == 'T' && s[13] == ':' && s[16] == ':';
124 bool const without_millisecond = common && s[22] == ':';
125 bool const with_millisecond = common && s[19] == '.' && s[26] == ':';
127 if (!with_millisecond && !without_millisecond) {
128 throw TimeFormatError (s);
131 _year = lexical_cast<int> (s.substr (0, 4));
132 _month = lexical_cast<int> (s.substr (5, 2));
133 _day = lexical_cast<int> (s.substr (8, 2));
134 _hour = lexical_cast<int> (s.substr (11, 2));
135 _minute = lexical_cast<int> (s.substr (14, 2));
136 _second = lexical_cast<int> (s.substr (17, 2));
137 if (without_millisecond) {
139 _tz_hour = lexical_cast<int> (s.substr (20, 2));
140 _tz_minute = lexical_cast<int> (s.substr (23, 2));
142 _millisecond = lexical_cast<int> (s.substr (20, 3));
143 _tz_hour = lexical_cast<int> (s.substr (24, 2));
144 _tz_minute = lexical_cast<int> (s.substr (27, 2));
147 int const plus_minus_position = with_millisecond ? 23 : 19;
149 if (s[plus_minus_position] == '-') {
150 _tz_hour = -_tz_hour;
151 } else if (s[plus_minus_position] != '+') {
152 throw TimeFormatError (s);
156 /** @return A string of the form 2013-01-05T18:06:59+04:00 or 2013-01-05T18:06:59.123+04:00 */
158 LocalTime::as_string (bool with_millisecond) const
162 buffer, sizeof (buffer),
164 date().c_str(), time_of_day(with_millisecond).c_str(), (_tz_hour >= 0 ? "+" : "-"), abs (_tz_hour), _tz_minute
169 /** @return The date in the form YYYY-MM-DD */
171 LocalTime::date () const
174 snprintf (buffer, sizeof (buffer), "%04d-%02d-%02d", _year, _month, _day);
178 /** @return The time in the form HH:MM:SS or HH:MM:SS.mmm */
180 LocalTime::time_of_day (bool with_millisecond) const
183 if (with_millisecond) {
184 snprintf (buffer, sizeof (buffer), "%02d:%02d:%02d.%03d", _hour, _minute, _second, _millisecond);
186 snprintf (buffer, sizeof (buffer), "%02d:%02d:%02d", _hour, _minute, _second);
192 LocalTime::operator== (LocalTime const & other) const
194 return _year == other._year && _month == other._month && _day == other._day &&
195 _hour == other._hour && _second == other._second && _millisecond == other._millisecond &&
196 _tz_hour == other._tz_hour && _tz_minute == other._tz_minute;
200 LocalTime::operator!= (LocalTime const & other) const
202 return !(*this == other);
206 dcp::operator<< (ostream& s, LocalTime const & t)