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 or 2013-01-05T18:06:59.123 or 2013-01-05T18:06:59+04:00 or 2013-01-05T18:06:59.123+04:00 */
116 /* 0123456789012345678 or 01234567890123456789012 or 0123456789012345678901234 or 01234567890123456789012345678 */
118 if (s.length() < 19) {
119 throw TimeFormatError (s);
122 bool with_millisecond = false;
123 bool with_tz = false;
125 switch (s.length ()) {
129 with_millisecond = true;
135 with_millisecond = with_tz = true;
138 throw TimeFormatError (s);
141 int const tz_pos = with_millisecond ? 23 : 19;
143 /* Check incidental characters */
144 if (s[4] != '-' || s[7] != '-' || s[10] != 'T' || s[13] != ':' || s[16] != ':') {
145 throw TimeFormatError (s);
147 if (with_millisecond && s[19] != '.') {
148 throw TimeFormatError (s);
150 if (with_tz && s[tz_pos] != '+' && s[tz_pos] != '-') {
151 throw TimeFormatError (s);
154 _year = lexical_cast<int> (s.substr (0, 4));
155 _month = lexical_cast<int> (s.substr (5, 2));
156 _day = lexical_cast<int> (s.substr (8, 2));
157 _hour = lexical_cast<int> (s.substr (11, 2));
158 _minute = lexical_cast<int> (s.substr (14, 2));
159 _second = lexical_cast<int> (s.substr (17, 2));
160 _millisecond = with_millisecond ? lexical_cast<int> (s.substr (20, 3)) : 0;
161 _tz_hour = with_tz ? lexical_cast<int> (s.substr (tz_pos + 1, 2)) : 0;
162 _tz_minute = with_tz ? lexical_cast<int> (s.substr (tz_pos + 4, 2)) : 0;
164 if (with_tz && s[tz_pos] == '-') {
165 _tz_hour = -_tz_hour;
169 /** @return A string of the form 2013-01-05T18:06:59+04:00 or 2013-01-05T18:06:59.123+04:00 */
171 LocalTime::as_string (bool with_millisecond) const
175 buffer, sizeof (buffer),
177 date().c_str(), time_of_day(true, with_millisecond).c_str(), (_tz_hour >= 0 ? "+" : "-"), abs (_tz_hour), _tz_minute
182 /** @return The date in the form YYYY-MM-DD */
184 LocalTime::date () const
187 snprintf (buffer, sizeof (buffer), "%04d-%02d-%02d", _year, _month, _day);
191 /** @return The time in the form HH:MM:SS or HH:MM:SS.mmm */
193 LocalTime::time_of_day (bool with_second, bool with_millisecond) const
196 DCP_ASSERT(!(with_millisecond && !with_second));
197 if (with_millisecond) {
198 snprintf (buffer, sizeof (buffer), "%02d:%02d:%02d.%03d", _hour, _minute, _second, _millisecond);
199 } else if (with_second) {
200 snprintf (buffer, sizeof (buffer), "%02d:%02d:%02d", _hour, _minute, _second);
202 snprintf (buffer, sizeof (buffer), "%02d:%02d", _hour, _minute);
208 LocalTime::operator== (LocalTime const & other) const
210 return _year == other._year && _month == other._month && _day == other._day &&
211 _hour == other._hour && _second == other._second && _millisecond == other._millisecond &&
212 _tz_hour == other._tz_hour && _tz_minute == other._tz_minute;
216 LocalTime::operator!= (LocalTime const & other) const
218 return !(*this == other);
222 dcp::operator<< (ostream& s, LocalTime const & t)