konsolekalendar

konsolekalendarepoch.cpp
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1/*******************************************************************************
2 * konsolekalendarepoch.cpp *
3 * *
4 * KonsoleKalendar is a command line interface to KDE calendars *
5 * Copyright (C) 2002-2004 Tuukka Pasanen <illuusio@mailcity.com> *
6 * Copyright (C) 2003-2005 Allen Winter <winter@kde.org> *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the Free Software *
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
21 * *
22 * As a special exception, permission is given to link this program *
23 * with any edition of TQt, and distribute the resulting executable, *
24 * without including the source code for TQt in the source distribution. *
25 * *
26 ******************************************************************************/
33#include <stdlib.h>
34#include <iostream>
35
36#include <tqdatetime.h>
37#include "konsolekalendarepoch.h"
38
39using namespace KCal;
40using namespace std;
41
42KonsoleKalendarEpoch::KonsoleKalendarEpoch()
43{
44}
45
46KonsoleKalendarEpoch::~KonsoleKalendarEpoch()
47{
48}
49
50// By "epoch" we mean the number of seconds since 00:00:00 UTC on January 1 1970
51
52// Function to convert an epoch value into a TQDateTime
53TQDateTime KonsoleKalendarEpoch::epoch2TQDateTime( uint epoch )
54{
55 TQDateTime dt;
56 dt.setTime_t( epoch, TQt::UTC );
57 return( dt );
58}
59
60// Function to convert a TQDateTime value into an epoch
61uint KonsoleKalendarEpoch::TQDateTime2epoch( TQDateTime dt )
62{
63 // THIS FUNCTION CAN BE OFF BY 1 HOUR DUE TO DAYLIGHT SAVINGS TIME.
64 // SORRY QT DOESN'T HANDLE DAYLIGHT SAVINGS TIME.
65
66 // Compute #seconds to subtract for local timezone difference from UTC.
67 int offset = TQDateTime::currentDateTime( TQt::UTC ).toTime_t()
68 - TQDateTime::currentDateTime( TQt::LocalTime ).toTime_t();
69 return( dt.toTime_t() - offset );
70}
71
72#if defined (TEST)
73// Pass -DTEST to the compile command to create the test program, e.g:
74// cc -DTEST -I/usr/local/KDE/include konsolekalendarepoch.cpp
75// -L/usr/local/KDE/lib -lqt-mt -pthread
76main()
77{
78 uint epoch;
79 TQDateTime dt;
80
81 cout << endl;
82 cout << "NOTE: Some tests may be off by 1 hour (3600 secs) "
83 << "due to daylight savings time"
84 << endl << endl;
85
86 // Test1
87 epoch = 0;
88 dt = KonsoleKalendarEpoch::epoch2TQDateTime( epoch );
89 cout << "TEST 1:" << endl;
90 cout << "epoch="
91 << epoch
92 << " converts to "
93 << dt.toString( TQt::TextDate )
94 << endl;
95
96 epoch = KonsoleKalendarEpoch::TQDateTime2epoch( dt );
97 cout << "date="
98 << dt.toString( TQt::TextDate )
99 << " converts to "
100 << "epoch="
101 << epoch
102 << endl;
103
104 // Test2
105 epoch = 100000;
106 dt = KonsoleKalendarEpoch::epoch2TQDateTime( epoch );
107 cout << "TEST 2:" << endl;
108 cout << "epoch="
109 << epoch
110 << " converts to "
111 << dt.toString( TQt::TextDate )
112 << endl;
113
114 epoch = KonsoleKalendarEpoch::TQDateTime2epoch( dt );
115 cout << "date="
116 << dt.toString( TQt::TextDate )
117 << " converts to "
118 << "epoch="
119 << epoch
120 << endl;
121
122 // Test3
123 epoch = 10000000;
124 dt = KonsoleKalendarEpoch::epoch2TQDateTime( epoch );
125 cout << "TEST 3:" << endl;
126 cout << "epoch="
127 << epoch
128 << " converts to "
129 << dt.toString( TQt::TextDate )
130 << endl;
131
132 epoch = KonsoleKalendarEpoch::TQDateTime2epoch( dt );
133 cout << "date="
134 << dt.toString( TQt::TextDate )
135 << " converts to "
136 << "epoch="
137 << epoch
138 << endl;
139
140 // Test4
141 epoch = 1000000000;
142 dt = KonsoleKalendarEpoch::epoch2TQDateTime( epoch );
143 cout << "TEST 4:" << endl;
144 cout << "epoch="
145 << epoch
146 << " converts to "
147 << dt.toString( TQt::TextDate )
148 << endl;
149
150 epoch = KonsoleKalendarEpoch::TQDateTime2epoch( dt );
151 cout << "date="
152 << dt.toString( TQt::TextDate )
153 << " converts to "
154 << "epoch="
155 << epoch
156 << endl;
157
158 // Test5
159 epoch = 10000000000;
160 dt = KonsoleKalendarEpoch::epoch2TQDateTime( epoch );
161 cout << "TEST 5:" << endl;
162 cout << "epoch="
163 << epoch
164 << " converts to "
165 << dt.toString( TQt::TextDate )
166 << endl;
167
168 epoch = KonsoleKalendarEpoch::TQDateTime2epoch( dt );
169 cout << "date="
170 << dt.toString( TQt::TextDate )
171 << " converts to "
172 << "epoch="
173 << epoch
174 << endl;
175}
176#endif
KCal::KonsoleKalendarEpoch::TQDateTime2epoch
static uint TQDateTime2epoch(TQDateTime dt)
Converts QT DateTime to epoch format.
Definition: konsolekalendarepoch.cpp:61
KCal::KonsoleKalendarEpoch::epoch2TQDateTime
static TQDateTime epoch2TQDateTime(uint epoch)
Converts epoch time to TQDateTime format.
Definition: konsolekalendarepoch.cpp:53
konsolekalendarepoch.h
Provides the KonsoleKalendarEpoch class definition.