author | erik <erik> | 2007-01-29 21:39:43 (UTC) |
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committer | erik <erik> | 2007-01-29 21:39:43 (UTC) |
commit | b2c306a99b8dc82c981390f02db859149fac8cf0 (patch) (side-by-side diff) | |
tree | 5d3b06d7534611b8a6ea56f592d95b59b18a218c /core | |
parent | 597643805ce89c1237035e7f38ec953cfc0d080f (diff) | |
download | opie-b2c306a99b8dc82c981390f02db859149fac8cf0.zip opie-b2c306a99b8dc82c981390f02db859149fac8cf0.tar.gz opie-b2c306a99b8dc82c981390f02db859149fac8cf0.tar.bz2 |
Reformat according to current Opie coding style.
-rw-r--r-- | core/pim/datebook/datebookweek.cpp | 74 |
1 files changed, 48 insertions, 26 deletions
diff --git a/core/pim/datebook/datebookweek.cpp b/core/pim/datebook/datebookweek.cpp index ce0b10b..8caa827 100644 --- a/core/pim/datebook/datebookweek.cpp +++ b/core/pim/datebook/datebookweek.cpp @@ -589,36 +589,52 @@ QDate DateBookWeek::weekDate() const return d.addDays(-dayoffset); } -// this used to only be needed by datebook.cpp, but now we need it inside -// week view since -// we need to be able to figure out our total number of weeks on the fly... -// this is probably the best place to put it.. +// This used to only be needed by datebook.cpp, but now we need it +// inside week view since we need to be able to figure out our total +// number of weeks on the fly. This is probably the best place to put +// it. // For Weeks that start on Monday... (EASY!) -// At the moment we will use ISO 8601 method for computing -// the week. Granted, other countries use other methods, -// bet we aren't doing any Locale stuff at the moment. So, -// this should pass. This Algorithim is public domain and -// available at: +// At the moment we will use the ISO 8601 method for computing the week. +// Granted, other countries use other methods, but we aren't doing any +// Locale stuff at the moment. Without locale info it is too hard to +// guess what method should be used. So, this should pass. This +// algorithim is public domain and available at: // http://personal.ecu.edu/mccartyr/ISOwdALG.txt -// the week number is return, and the year number is returned in year +// the week number is returned, and the year number is returned in year // for Instance 2001/12/31 is actually the first week in 2002. -// There is a more mathematical definition, but I will implement it when -// we are pass our deadline. +// There is a more mathematical definition, it should be implemented. // For Weeks that start on Sunday... (ahh... home rolled) -// okay, if Jan 1 is on Friday or Saturday, -// it will go to the pervious -// week... - +// okay, if Jan 1 is on Friday or Saturday, it will go to the previous +// week. + +/*! + * The week number and year number of a date may actually be different + * then the date itself as specified by the ISO 8601 standard. For + * example if Jan 1 year falls on a Friday, the week number will + * be the last week number for the previous year (52 of year - 1). Another + * example is that the date 2001-12-31 falls on a Monday, its week number + * is 1 and its year is 2002. This function provides stripped down + * version of the alogrithm described in + * http://personal.ecu.edu/mccartyr/ISOwdALG.txt to provide the correct + * week number and year number for a given date. + * + * \param d The date that you want to know the week number for. + * \param week A reference to the variable you want to store the week + * number in. + * \param year A reference to the variable you want to store the year + * number in. + * \param startOnMonday Inform the function whether weeks start on + * Sunday or Monday. Set to true if your weeks start on Monday. + * \return false if the supplied date is invalid, true otherwise. + */ bool calcWeek( const QDate &d, int &week, int &year, bool startOnMonday ) { - int weekNumber; - int yearNumber; + int weekNumber = -1; + int yearNumber = -1; - // remove a pesky warning, (Optimizations on g++) - weekNumber = -1; int jan1WeekDay = QDate(d.year(), 1, 1).dayOfWeek(); int dayOfWeek = d.dayOfWeek(); @@ -629,18 +645,21 @@ bool calcWeek( const QDate &d, int &week, int &year, // find the Jan1Weekday; if ( d.dayOfYear() <= ( 8 - jan1WeekDay) && jan1WeekDay > 4 ) { yearNumber = d.year() - 1; - if ( jan1WeekDay == 5 || ( jan1WeekDay == 6 && QDate::leapYear(yearNumber) ) ) + if ( jan1WeekDay == 5 + || ( jan1WeekDay == 6 && QDate::leapYear(yearNumber) ) ) weekNumber = 53; else weekNumber = 52; } else yearNumber = d.year(); + if ( yearNumber == d.year() ) { int totalDays = 365; if ( QDate::leapYear(yearNumber) ) totalDays++; if ( ((totalDays - d.dayOfYear()) < (4 - dayOfWeek) ) - || (jan1WeekDay == 7) && (totalDays - d.dayOfYear()) < 3) { + || (jan1WeekDay == 7) && (totalDays - d.dayOfYear()) < 3) + { yearNumber++; weekNumber = 1; } @@ -654,15 +673,18 @@ bool calcWeek( const QDate &d, int &week, int &year, } else { // it's better to keep these cases separate... if ( d.dayOfYear() <= (7 - jan1WeekDay) && jan1WeekDay > 4 - && jan1WeekDay != 7 ) { + && jan1WeekDay != 7 ) + { yearNumber = d.year() - 1; if ( jan1WeekDay == 6 - || (jan1WeekDay == 7 && QDate::leapYear(yearNumber) ) ) { + || (jan1WeekDay == 7 && QDate::leapYear(yearNumber) ) ) + { weekNumber = 53; }else weekNumber = 52; } else yearNumber = d.year(); + if ( yearNumber == d.year() ) { int totalDays = 365; if ( QDate::leapYear( yearNumber ) ) @@ -675,11 +697,11 @@ bool calcWeek( const QDate &d, int &week, int &year, if ( yearNumber == d.year() ) { int j = d.dayOfYear() + (7 - dayOfWeek % 7) + ( jan1WeekDay - 1 ); weekNumber = j / 7; - if ( jan1WeekDay > 4 ) { + + if ( jan1WeekDay > 4 ) weekNumber--; } } - } year = yearNumber; week = weekNumber; return true; |