Diffstat (limited to 'library/backend/timeconversion.cpp') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | library/backend/timeconversion.cpp | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/library/backend/timeconversion.cpp b/library/backend/timeconversion.cpp new file mode 100644 index 0000000..ef7762d --- a/dev/null +++ b/library/backend/timeconversion.cpp @@ -0,0 +1,237 @@ +/**********************************************************************
+** Copyright (C) 2000 Trolltech AS. All rights reserved.
+**
+** This file is part of Qtopia Environment.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include <qglobal.h>
+#include <qtopia/timeconversion.h>
+#include <qregexp.h>
+#include <stdlib.h>
+
+QString TimeConversion::toString( const QDate &d )
+{
+ QString r = QString::number( d.day() ) + "." +
+ QString::number( d.month() ) + "." +
+ QString::number( d.year() );
+ //qDebug("TimeConversion::toString %s", r.latin1());
+ return r;
+}
+
+QDate TimeConversion::fromString( const QString &datestr )
+{
+ int monthPos = datestr.find('.');
+ int yearPos = datestr.find('.', monthPos+1 );
+ if ( monthPos == -1 || yearPos == -1 ) {
+ qDebug("fromString didn't find . in str = %s; mpos = %d ypos = %d", datestr.latin1(), monthPos, yearPos );
+ return QDate();
+ }
+ int d = datestr.left( monthPos ).toInt();
+ int m = datestr.mid( monthPos+1, yearPos - monthPos - 1 ).toInt();
+ int y = datestr.mid( yearPos+1 ).toInt();
+ QDate date ( y,m,d );
+ //qDebug("TimeConversion::fromString ymd = %s => %d %d %d; mpos = %d ypos = %d", datestr.latin1(), y, m, d, monthPos, yearPos);
+ return date;
+}
+
+time_t TimeConversion::toUTC( const QDateTime& dt )
+{
+ time_t tmp;
+ struct tm *lt;
+
+#if defined(_OS_WIN32) || defined (Q_OS_WIN32) || defined (Q_OS_WIN64)
+ _tzset();
+#else
+ tzset();
+#endif
+
+ // get a tm structure from the system to get the correct tz_name
+ tmp = time( 0 );
+ lt = localtime( &tmp );
+
+ lt->tm_sec = dt.time().second();
+ lt->tm_min = dt.time().minute();
+ lt->tm_hour = dt.time().hour();
+ lt->tm_mday = dt.date().day();
+ lt->tm_mon = dt.date().month() - 1; // 0-11 instead of 1-12
+ lt->tm_year = dt.date().year() - 1900; // year - 1900
+ //lt->tm_wday = dt.date().dayOfWeek(); ignored anyway
+ //lt->tm_yday = dt.date().dayOfYear(); ignored anyway
+ lt->tm_wday = -1;
+ lt->tm_yday = -1;
+ // tm_isdst negative -> mktime will find out about DST
+ lt->tm_isdst = -1;
+ // keep tm_zone and tm_gmtoff
+ tmp = mktime( lt );
+ return tmp;
+}
+
+QDateTime TimeConversion::fromUTC( time_t time )
+{
+ struct tm *lt;
+
+#if defined(_OS_WIN32) || defined (Q_OS_WIN32) || defined (Q_OS_WIN64)
+ _tzset();
+#else
+ tzset();
+#endif
+ lt = localtime( &time );
+ QDateTime dt;
+ dt.setDate( QDate( lt->tm_year + 1900, lt->tm_mon + 1, lt->tm_mday ) );
+ dt.setTime( QTime( lt->tm_hour, lt->tm_min, lt->tm_sec ) );
+ return dt;
+}
+
+
+int TimeConversion::secsTo( const QDateTime &from, const QDateTime &to )
+{
+ return toUTC( to ) - toUTC( from );
+}
+
+QCString TimeConversion::toISO8601( const QDate &d )
+{
+ time_t tmp = toUTC( d );
+ struct tm *utc = gmtime( &tmp );
+
+ QCString str;
+ str.sprintf("%04d%02d%02d", (utc->tm_year + 1900), utc->tm_mon+1, utc->tm_mday );
+ return str;
+}
+
+QCString TimeConversion::toISO8601( const QDateTime &dt )
+{
+ time_t tmp = toUTC( dt );
+ struct tm *utc = gmtime( &tmp );
+
+ QCString str;
+ str.sprintf("%04d%02d%02dT%02d%02d%02dZ",
+ (utc->tm_year + 1900), utc->tm_mon+1, utc->tm_mday,
+ utc->tm_hour, utc->tm_min, utc->tm_sec );
+ return str;
+}
+
+QDateTime TimeConversion::fromISO8601( const QCString &s )
+{
+
+#if defined(_OS_WIN32) || defined (Q_OS_WIN32) || defined (Q_OS_WIN64)
+ _tzset();
+#else
+ tzset();
+#endif
+
+ struct tm *thetime = new tm;
+
+ QCString str = s.copy();
+ str.replace(QRegExp("-"), "" );
+ str.replace(QRegExp(":"), "" );
+ str.stripWhiteSpace();
+ str = str.lower();
+
+ int i = str.find( "t" );
+ QCString date;
+ QCString timestr;
+ if ( i != -1 ) {
+ date = str.left( i );
+ timestr = str.mid( i+1 );
+ } else {
+ date = str;
+ }
+
+// qDebug("--- parsing ISO time---");
+ thetime->tm_year = 100;
+ thetime->tm_mon = 0;
+ thetime->tm_mday = 0;
+ thetime->tm_hour = 0;
+ thetime->tm_min = 0;
+ thetime->tm_sec = 0;
+
+// qDebug("date = %s", date.data() );
+
+ switch( date.length() ) {
+ case 8:
+ thetime->tm_mday = date.right( 2 ).toInt();
+ case 6:
+ thetime->tm_mon = date.mid( 4, 2 ).toInt() - 1;
+ case 4:
+ thetime->tm_year = date.left( 4 ).toInt();
+ thetime->tm_year -= 1900;
+ break;
+ default:
+ break;
+ }
+
+ int tzoff = 0;
+ bool inLocalTime = FALSE;
+ if ( timestr.find( 'z' ) == (int)timestr.length() - 1 )
+ // UTC
+ timestr = timestr.left( timestr.length() -1 );
+ else {
+ int plus = timestr.find( "+" );
+ int minus = timestr.find( "-" );
+ if ( plus != -1 || minus != -1 ) {
+ // have a timezone offset
+ plus = (plus != -1) ? plus : minus;
+ QCString off = timestr.mid( plus );
+ timestr = timestr.left( plus );
+
+ int tzoffhour = 0;
+ int tzoffmin = 0;
+ switch( off.length() ) {
+ case 5:
+ tzoffmin = off.mid(3).toInt();
+ case 3:
+ tzoffhour = off.left(3).toInt();
+ default:
+ break;
+ }
+ tzoff = 60*tzoffhour + tzoffmin;
+ } else
+ inLocalTime = TRUE;
+ }
+
+ // get the time:
+ switch( timestr.length() ) {
+ case 6:
+ thetime->tm_sec = timestr.mid( 4 ).toInt();
+ case 4:
+ thetime->tm_min = timestr.mid( 2, 2 ).toInt();
+ case 2:
+ thetime->tm_hour = timestr.left( 2 ).toInt();
+ default:
+ break;
+ }
+
+ int tzloc = 0;
+ time_t tmp = time( 0 );
+ if ( !inLocalTime ) {
+ // have to get the offset between gmt and local time
+ struct tm *lt = localtime( &tmp );
+ tzloc = mktime( lt );
+ struct tm *ut = gmtime( &tmp );
+ tzloc -= mktime( ut );
+ }
+// qDebug("time: %d %d %d, tzloc=%d, tzoff=%d", thetime->tm_hour, thetime->tm_min, thetime->tm_sec,
+// tzloc, tzoff );
+
+ tmp = mktime( thetime );
+ tmp += 60*(-tzloc + tzoff);
+
+ delete thetime;
+
+ return fromUTC( tmp );
+}
+
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