recurrencerule.cpp File Reference

#include "recurrencerule.h"
#include <kdebug.h>
#include <kglobal.h>
#include <qdatetime.h>
#include <qstringlist.h>
#include <limits.h>
#include <math.h>

Include dependency graph for recurrencerule.cpp:

Go to the source code of this file.

Defines
#define	dumpByIntList(list, label)
#define	fixConstraint(element, value)
#define	intConstraint(list, element)
#define	mergeConstraint(name, cmparison)
Functions
long long	ownSecsTo (const QDateTime &dt1, const QDateTime &dt2)

---

Define Documentation

#define dumpByIntList	(	list,
		label		)

Value:

if ( !list.isEmpty() ) {\
    QStringList lst;\
    for ( QValueList<int>::ConstIterator it = list.begin();\
          it != list.end(); ++it ) {\
      lst.append( QString::number( *it ) );\
    }\
    kdDebug(5800) << "   " << label << lst.join(", ") << endl;\
  }

#define fixConstraint	(	element,
		value		)

Value:

{ \
    tmp.clear(); \
    for ( it = mConstraints.constBegin(); it != mConstraints.constEnd(); ++it ) { \
      con = (*it); con.element = value; tmp.append( con ); \
    } \
    mConstraints = tmp; \
  }

#define intConstraint	(	list,
		element		)

Value:

if ( !list.isEmpty() ) { \
    for ( it = mConstraints.constBegin(); it != mConstraints.constEnd(); ++it ) { \
      for ( intit = list.constBegin(); intit != list.constEnd(); ++intit ) { \
        con = (*it); \
        con.element = (*intit); \
        tmp.append( con ); \
      } \
    } \
    mConstraints = tmp; \
    tmp.clear(); \
  }

#define mergeConstraint	(	name,
		cmparison		)

Value:

if ( conit.name cmparison ) { \
    if ( !(result.name cmparison) || result.name == conit.name ) { \
      result.name = conit.name; \
    } else return false;\
  }

---

Function Documentation

long long ownSecsTo	(	const QDateTime &	dt1,
		const QDateTime &	dt2
	)

Workaround for broken QDateTime::secsTo (at least in Qt 3.3).

While QDateTime::secsTo does take time zones into account, QDateTime::addSecs does not, so we have a problem: QDateTime d1(QDate(2005, 10, 30), QTime(1, 30, 0) ); QDateTime d2(QDate(2005, 10, 30), QTime(3, 30, 0) );

kdDebug(5800) << "d1=" << d1 << ", d2=" << d2 << endl; kdDebug(5800) << "d1.secsTo(d2)=" << d1.secsTo(d2) << endl; kdDebug(5800) << "d1.addSecs(d1.secsTo(d2))=" << d1.addSecs(d1.secsTo(d2)) << endl; This code generates the following output: libkcal: d1=Son Okt 30 01:30:00 2005, d2=Son Okt 30 03:30:00 2005 libkcal: d1.secsTo(d2)=10800 libkcal: d1.addSecs(d1.secsTo(d2))=Son Okt 30 04:30:00 2005 Notice that secsTo counts the hour between 2:00 and 3:00 twice, while adddSecs doesn't and so has one additional hour. This basically makes it impossible to use QDateTime for *any* calculations, in local time zone as well as in UTC. Since we don't want to use time zones anyway, but do all secondsly/minutely/hourly calculations in UTC, we simply use our own secsTo, which ignores all time zone shifts.

Definition at line 58 of file recurrencerule.cpp.