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1/**********************************************************************
2** Copyright (C) 2000 Trolltech AS. All rights reserved.
3**
4** This file is part of Qtopia Environment.
5**
6** This file may be distributed and/or modified under the terms of the
7** GNU General Public License version 2 as published by the Free Software
8** Foundation and appearing in the file LICENSE.GPL included in the
9** packaging of this file.
10**
11** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
12** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
13**
14** See http://www.trolltech.com/gpl/ for GPL licensing information.
15**
16** Contact info@trolltech.com if any conditions of this licensing are
17** not clear to you.
18**
19**********************************************************************/
20
21#include <qglobal.h>
22#include "timeconversion.h"
23#include <qregexp.h>
24#include <stdlib.h>
25
26QString TimeConversion::toString( const QDate &d )
27{
28 QString r = QString::number( d.day() ) + "." +
29 QString::number( d.month() ) + "." +
30 QString::number( d.year() );
31 //qDebug("TimeConversion::toString %s", r.latin1());
32 return r;
33}
34
35QDate TimeConversion::fromString( const QString &datestr )
36{
37 int monthPos = datestr.find('.');
38 int yearPos = datestr.find('.', monthPos+1 );
39 if ( monthPos == -1 || yearPos == -1 ) {
40 qDebug("fromString didn't find . in str = %s; mpos = %d ypos = %d", datestr.latin1(), monthPos, yearPos );
41 return QDate();
42 }
43 int d = datestr.left( monthPos ).toInt();
44 int m = datestr.mid( monthPos+1, yearPos - monthPos - 1 ).toInt();
45 int y = datestr.mid( yearPos+1 ).toInt();
46 QDate date ( y,m,d );
47 //qDebug("TimeConversion::fromString ymd = %s => %d %d %d; mpos = %d ypos = %d", datestr.latin1(), y, m, d, monthPos, yearPos);
48 return date;
49}
50
51time_t TimeConversion::toUTC( const QDateTime& dt )
52{
53 time_t tmp;
54 struct tm *lt;
55
56#if defined(_OS_WIN32) || defined (Q_OS_WIN32) || defined (Q_OS_WIN64)
57 _tzset();
58#else
59 tzset();
60#endif
61
62 // get a tm structure from the system to get the correct tz_name
63 tmp = time( 0 );
64 lt = localtime( &tmp );
65
66 lt->tm_sec = dt.time().second();
67 lt->tm_min = dt.time().minute();
68 lt->tm_hour = dt.time().hour();
69 lt->tm_mday = dt.date().day();
70 lt->tm_mon = dt.date().month() - 1; // 0-11 instead of 1-12
71 lt->tm_year = dt.date().year() - 1900; // year - 1900
72 //lt->tm_wday = dt.date().dayOfWeek(); ignored anyway
73 //lt->tm_yday = dt.date().dayOfYear(); ignored anyway
74 lt->tm_wday = -1;
75 lt->tm_yday = -1;
76 // tm_isdst negative -> mktime will find out about DST
77 lt->tm_isdst = -1;
78 // keep tm_zone and tm_gmtoff
79 tmp = mktime( lt );
80 return tmp;
81}
82
83QDateTime TimeConversion::fromUTC( time_t time )
84{
85 struct tm *lt;
86
87#if defined(_OS_WIN32) || defined (Q_OS_WIN32) || defined (Q_OS_WIN64)
88 _tzset();
89#else
90 tzset();
91#endif
92 lt = localtime( &time );
93 QDateTime dt;
94 dt.setDate( QDate( lt->tm_year + 1900, lt->tm_mon + 1, lt->tm_mday ) );
95 dt.setTime( QTime( lt->tm_hour, lt->tm_min, lt->tm_sec ) );
96 return dt;
97}
98
99
100int TimeConversion::secsTo( const QDateTime &from, const QDateTime &to )
101{
102 return toUTC( to ) - toUTC( from );
103}
104
105QCString TimeConversion::toISO8601( const QDate &d )
106{
107 time_t tmp = toUTC( d );
108 struct tm *utc = gmtime( &tmp );
109
110 QCString str;
111 str.sprintf("%04d%02d%02d", (utc->tm_year + 1900), utc->tm_mon+1, utc->tm_mday );
112 return str;
113}
114
115QCString TimeConversion::toISO8601( const QDateTime &dt )
116{
117 time_t tmp = toUTC( dt );
118 struct tm *utc = gmtime( &tmp );
119
120 QCString str;
121 str.sprintf("%04d%02d%02dT%02d%02d%02dZ",
122 (utc->tm_year + 1900), utc->tm_mon+1, utc->tm_mday,
123 utc->tm_hour, utc->tm_min, utc->tm_sec );
124 return str;
125}
126
127QDateTime TimeConversion::fromISO8601( const QCString &s )
128{
129
130#if defined(_OS_WIN32) || defined (Q_OS_WIN32) || defined (Q_OS_WIN64)
131 _tzset();
132#else
133 tzset();
134#endif
135
136 struct tm *thetime = new tm;
137
138 QCString str = s.copy();
139 str.replace(QRegExp("-"), "" );
140 str.replace(QRegExp(":"), "" );
141 str.stripWhiteSpace();
142 str = str.lower();
143
144 int i = str.find( "t" );
145 QCString date;
146 QCString timestr;
147 if ( i != -1 ) {
148 date = str.left( i );
149 timestr = str.mid( i+1 );
150 } else {
151 date = str;
152 }
153
154// qDebug("--- parsing ISO time---");
155 thetime->tm_year = 100;
156 thetime->tm_mon = 0;
157 thetime->tm_mday = 0;
158 thetime->tm_hour = 0;
159 thetime->tm_min = 0;
160 thetime->tm_sec = 0;
161
162// qDebug("date = %s", date.data() );
163
164 switch( date.length() ) {
165 case 8:
166 thetime->tm_mday = date.right( 2 ).toInt();
167 case 6:
168 thetime->tm_mon = date.mid( 4, 2 ).toInt() - 1;
169 case 4:
170 thetime->tm_year = date.left( 4 ).toInt();
171 thetime->tm_year -= 1900;
172 break;
173 default:
174 break;
175 }
176
177 int tzoff = 0;
178 bool inLocalTime = FALSE;
179 if ( timestr.find( 'z' ) == (int)timestr.length() - 1 )
180 // UTC
181 timestr = timestr.left( timestr.length() -1 );
182 else {
183 int plus = timestr.find( "+" );
184 int minus = timestr.find( "-" );
185 if ( plus != -1 || minus != -1 ) {
186 // have a timezone offset
187 plus = (plus != -1) ? plus : minus;
188 QCString off = timestr.mid( plus );
189 timestr = timestr.left( plus );
190
191 int tzoffhour = 0;
192 int tzoffmin = 0;
193 switch( off.length() ) {
194 case 5:
195 tzoffmin = off.mid(3).toInt();
196 case 3:
197 tzoffhour = off.left(3).toInt();
198 default:
199 break;
200 }
201 tzoff = 60*tzoffhour + tzoffmin;
202 } else
203 inLocalTime = TRUE;
204 }
205
206 // get the time:
207 switch( timestr.length() ) {
208 case 6:
209 thetime->tm_sec = timestr.mid( 4 ).toInt();
210 case 4:
211 thetime->tm_min = timestr.mid( 2, 2 ).toInt();
212 case 2:
213 thetime->tm_hour = timestr.left( 2 ).toInt();
214 default:
215 break;
216 }
217
218 int tzloc = 0;
219 time_t tmp = time( 0 );
220 if ( !inLocalTime ) {
221 // have to get the offset between gmt and local time
222 struct tm *lt = localtime( &tmp );
223 tzloc = mktime( lt );
224 struct tm *ut = gmtime( &tmp );
225 tzloc -= mktime( ut );
226 }
227// qDebug("time: %d %d %d, tzloc=%d, tzoff=%d", thetime->tm_hour, thetime->tm_min, thetime->tm_sec,
228 // tzloc, tzoff );
229
230 tmp = mktime( thetime );
231 tmp += 60*(-tzloc + tzoff);
232
233 delete thetime;
234
235 return fromUTC( tmp );
236}
237