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koffice/kspread/kspread_functions_datetime.cpp

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/* This file is part of the KDE project
Copyright (C) 1998-2003 The KSpread Team
www.koffice.org/kspread
Copyright (C) 2005 Tomas Mecir <mecirt@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
// built-in date/time functions
#include "functions.h"
#include "kspread_functions_helper.h"
#include "valuecalc.h"
#include "valueconverter.h"
#include <kcalendarsystem.h>
#include <tdelocale.h>
using namespace KSpread;
// prototypes, sorted
Value func_currentDate (valVector args, ValueCalc *calc, FuncExtra *);
Value func_currentDateTime (valVector args, ValueCalc *calc, FuncExtra *);
Value func_currentTime (valVector args, ValueCalc *calc, FuncExtra *);
Value func_date (valVector args, ValueCalc *calc, FuncExtra *);
Value func_datevalue (valVector args, ValueCalc *calc, FuncExtra *);
Value func_day (valVector args, ValueCalc *calc, FuncExtra *);
Value func_dayname (valVector args, ValueCalc *calc, FuncExtra *);
Value func_dayOfYear (valVector args, ValueCalc *calc, FuncExtra *);
Value func_days (valVector args, ValueCalc *calc, FuncExtra *);
Value func_days360 (valVector args, ValueCalc *calc, FuncExtra *);
Value func_daysInMonth (valVector args, ValueCalc *calc, FuncExtra *);
Value func_daysInYear (valVector args, ValueCalc *calc, FuncExtra *);
Value func_easterSunday (valVector args, ValueCalc *calc, FuncExtra *);
Value func_edate (valVector args, ValueCalc *calc, FuncExtra *);
Value func_eomonth (valVector args, ValueCalc *calc, FuncExtra *);
Value func_hour (valVector args, ValueCalc *calc, FuncExtra *);
Value func_hours (valVector args, ValueCalc *calc, FuncExtra *);
Value func_isLeapYear (valVector args, ValueCalc *calc, FuncExtra *);
Value func_isoWeekNum (valVector args, ValueCalc *calc, FuncExtra *);
Value func_minute (valVector args, ValueCalc *calc, FuncExtra *);
Value func_minutes (valVector args, ValueCalc *calc, FuncExtra *);
Value func_month (valVector args, ValueCalc *calc, FuncExtra *);
Value func_monthname (valVector args, ValueCalc *calc, FuncExtra *);
Value func_months (valVector args, ValueCalc *calc, FuncExtra *);
Value func_second (valVector args, ValueCalc *calc, FuncExtra *);
Value func_seconds (valVector args, ValueCalc *calc, FuncExtra *);
Value func_time (valVector args, ValueCalc *calc, FuncExtra *);
Value func_timevalue (valVector args, ValueCalc *calc, FuncExtra *);
Value func_today (valVector args, ValueCalc *calc, FuncExtra *);
Value func_weekday (valVector args, ValueCalc *calc, FuncExtra *);
Value func_weeks (valVector args, ValueCalc *calc, FuncExtra *);
Value func_weeksInYear (valVector args, ValueCalc *calc, FuncExtra *);
Value func_year (valVector args, ValueCalc *calc, FuncExtra *);
Value func_years (valVector args, ValueCalc *calc, FuncExtra *);
// registers all date/time functions
// sadly, many of these functions aren't Excel compatible
void RegisterDateTimeFunctions()
{
// missing: Excel: WORKDAY, NETWORKDAYS, WEEKNUM, DATEDIF
// Gnumeric: UNIX2DATE, DATE2UNIX
// TODO: do we really need DATEVALUE and TIMEVALUE ?
FunctionRepository* repo = FunctionRepository::self();
Function *f;
f = new Function ("CURRENTDATE", func_currentDate);
f->setParamCount (0);
repo->add (f);
f = new Function ("CURRENTDATETIME", func_currentDateTime);
f->setParamCount (0);
repo->add (f);
f = new Function ("CURRENTTIME", func_currentTime);
f->setParamCount (0);
repo->add (f);
f = new Function ("DATE", func_date);
f->setParamCount (3);
repo->add (f);
f = new Function ("DATEVALUE", func_datevalue);
repo->add (f);
f = new Function ("DAY", func_day);
repo->add (f);
f = new Function ("DAYNAME", func_dayname);
repo->add (f);
f = new Function ("DAYOFYEAR", func_dayOfYear);
f->setParamCount (3);
repo->add (f);
f = new Function ("DAYS", func_days);
f->setParamCount (2);
repo->add (f);
f = new Function ("DAYS360", func_days360);
f->setParamCount (2, 3);
repo->add (f);
f = new Function ("DAYSINMONTH", func_daysInMonth);
f->setParamCount (2);
repo->add (f);
f = new Function ("DAYSINYEAR", func_daysInYear);
repo->add (f);
f = new Function ("EASTERSUNDAY", func_easterSunday);
repo->add (f);
f = new Function ("EDATE", func_edate);
f->setParamCount (2);
repo->add (f);
f = new Function ("EOMONTH", func_eomonth);
f->setParamCount (2);
repo->add (f);
f = new Function ("HOUR", func_hour);
f->setParamCount (0, 1);
repo->add (f);
f = new Function ("HOURS", func_hour); // same as HOUR
f->setParamCount (0, 1);
repo->add (f);
f = new Function ("ISLEAPYEAR", func_isLeapYear);
repo->add (f);
f = new Function ("ISOWEEKNUM", func_isoWeekNum);
repo->add (f);
f = new Function ("MINUTE", func_minute);
f->setParamCount (0, 1);
repo->add (f);
f = new Function ("MINUTES", func_minute); // same as MINUTE
f->setParamCount (0, 1);
repo->add (f);
f = new Function ("MONTH", func_month);
repo->add (f);
f = new Function ("MONTHNAME", func_monthname);
repo->add (f);
f = new Function ("MONTHS", func_months);
f->setParamCount (3);
repo->add (f);
f = new Function ("NOW", func_currentDateTime);
f->setParamCount (0);
repo->add (f);
f = new Function ("SECOND", func_second);
f->setParamCount (0, 1);
repo->add (f);
f = new Function ("SECONDS", func_second); // same as SECOND
f->setParamCount (0, 1);
repo->add (f);
f = new Function ("TIME", func_time);
f->setParamCount (3);
repo->add (f);
f = new Function ("TIMEVALUE", func_timevalue);
repo->add (f);
f = new Function ("TODAY", func_currentDate);
f->setParamCount (0);
repo->add (f);
f = new Function ("WEEKDAY", func_weekday);
f->setParamCount (1, 2);
repo->add (f);
f = new Function ("WEEKS", func_weeks);
f->setParamCount (3);
repo->add (f);
f = new Function ("WEEKSINYEAR", func_weeksInYear);
repo->add (f);
f = new Function ("YEAR", func_year);
repo->add (f);
f = new Function ("YEARS", func_years);
f->setParamCount (3);
repo->add (f);
}
// Function: EDATE
Value func_edate (valVector args, ValueCalc *calc, FuncExtra *)
{
TQDate date = calc->conv()->asDate (args[0]).asDate();
int months = calc->conv()->asInteger (args[1]).asInteger();
date = calc->conv()->locale()->calendar()->addMonths (date, months);
if (!date.isValid())
return Value::errorVALUE();
return Value (date);
}
// Function: EOMONTH
Value func_eomonth (valVector args, ValueCalc *calc, FuncExtra *)
{
// add months to date using EDATE
Value modDate = func_edate (args, calc, 0);
if (modDate.isError()) return modDate;
// modDate is currently in Date format
TQDate date = modDate.asDate();
date.setYMD (date.year(), date.month(), date.daysInMonth());
return Value (date);
}
// Function: DAYS360
// algorithm adapted from gnumeric
Value func_days360 (valVector args, ValueCalc *calc, FuncExtra *)
{
TQDate date1 = calc->conv()->asDate (args[0]).asDate();
TQDate date2 = calc->conv()->asDate (args[1]).asDate();
bool european = false;
if (args.count() == 3)
european = calc->conv()->asBoolean (args[2]).asBoolean();
int day1, day2;
int month1, month2;
int year1, year2;
bool negative = false;
if (date1.daysTo( date2 ) < 0)
{
TQDate tmp( date1 );
date1 = date2;
date2 = tmp;
negative = true;
}
day1 = date1.day();
day2 = date2.day();
month1 = date1.month();
month2 = date2.month();
year1 = date1.year();
year2 = date2.year();
if ( european )
{
if ( day1 == 31 )
day1 = 30;
if ( day2 == 31 )
day2 = 30;
}
else
{
// thanks to the Gnumeric developers for this...
if ( month1 == 2 && month2 == 2
&& date1.daysInMonth() == day1
&& date2.daysInMonth() == day2 )
day2 = 30;
if ( month1 == 2 && date1.daysInMonth() == day1 )
day1 = 30;
if ( day2 == 31 && day1 >= 30 )
day2 = 30;
if ( day1 == 31 )
day1 = 30;
}
int result = ( ( year2 - year1 ) * 12 + ( month2 - month1 ) ) * 30
+ ( day2 - day1 );
return Value (result);
}
// Function: YEAR
Value func_year (valVector args, ValueCalc *calc, FuncExtra *)
{
Value v = calc->conv()->asDate (args[0]);
if (v.isError()) return v;
TQDate date = v.asDate();
return Value (date.year ());
}
// Function: MONTH
Value func_month (valVector args, ValueCalc *calc, FuncExtra *)
{
Value v = calc->conv()->asDate (args[0]);
if (v.isError()) return v;
TQDate date = v.asDate();
return Value (date.month ());
}
// Function: DAY
Value func_day (valVector args, ValueCalc *calc, FuncExtra *)
{
Value v = calc->conv()->asDate (args[0]);
if (v.isError()) return v;
TQDate date = v.asDate();
return Value (date.day ());
}
// Function: HOUR
Value func_hour (valVector args, ValueCalc *calc, FuncExtra *)
{
TQTime time;
if (args.count() == 1)
{
Value v = calc->conv()->asTime (args[0]);
if (v.isError()) return v;
time = v.asTime();
}
else
time = TQTime::currentTime ();
return Value (time.hour ());
}
// Function: MINUTE
Value func_minute (valVector args, ValueCalc *calc, FuncExtra *)
{
TQTime time;
if (args.count() == 1)
{
Value v = calc->conv()->asTime (args[0]);
if (v.isError()) return v;
time = v.asTime();
}
else
time = TQTime::currentTime ();
return Value (time.minute ());
}
// Function: SECOND
Value func_second (valVector args, ValueCalc *calc, FuncExtra *)
{
TQTime time;
if (args.count() == 1)
{
Value v = calc->conv()->asTime (args[0]);
if (v.isError()) return v;
time = v.asTime();
}
else
time = TQTime::currentTime ();
return Value (time.second ());
}
// Function: weekday
Value func_weekday (valVector args, ValueCalc *calc, FuncExtra *)
{
Value v = calc->conv()->asDate (args[0]).asDate();
if (v.isError()) return v;
TQDate date = v.asDate();
int method = 1;
if (args.count() == 2)
method = calc->conv()->asInteger (args[1]).asInteger();
if ( method < 1 || method > 3 )
return Value::errorVALUE();
int result = date.dayOfWeek();
if (method == 3)
--result;
else if (method == 1)
{
++result;
result = result % 7;
}
return Value (result);
}
// Function: datevalue
// same result would be obtained by applying number format on a date value
Value func_datevalue (valVector args, ValueCalc *calc, FuncExtra *)
{
if (args[0].isString()) {
Value v = calc->conv()->asDate (args[0]);
if (! v.isError())
return calc->conv()->asFloat (v);
}
return Value::errorVALUE();
}
// Function: timevalue
// same result would be obtained by applying number format on a time value
Value func_timevalue (valVector args, ValueCalc *calc, FuncExtra *)
{
if (args[0].isString()) {
Value v = calc->conv()->asTime (args[0]);
if (! v.isError())
return calc->conv()->asFloat (v);
}
return Value::errorVALUE();
}
// Function: years
Value func_years (valVector args, ValueCalc *calc, FuncExtra *)
{
TQDate date1 = calc->conv()->asDate (args[0]).asDate();
TQDate date2 = calc->conv()->asDate (args[1]).asDate();
if (!date1.isValid() || !date2.isValid())
return Value::errorVALUE();
int type = calc->conv()->asInteger (args[2]).asInteger();
if (type == 0)
{
// max. possible years between both dates
int years = date2.year() - date1.year();
if (date2.month() < date1.month())
--years;
else if ( (date2.month() == date1.month()) && (date2.day() < date1.day()) )
--years;
return Value (years);
}
// type is non-zero now
// the number of full years in between, starting on 1/1/XXXX
if ( date1.year() == date2.year() )
return Value (0);
if ( (date1.month() != 1) || (date1.day() != 1) )
date1.setYMD(date1.year() + 1, 1, 1);
date2.setYMD(date2.year(), 1, 1);
return Value (date2.year() - date1.year());
}
// Function: months
Value func_months (valVector args, ValueCalc *calc, FuncExtra *)
{
TQDate date1 = calc->conv()->asDate (args[0]).asDate();
TQDate date2 = calc->conv()->asDate (args[1]).asDate();
if (!date1.isValid() || !date2.isValid())
return Value::errorVALUE();
int type = calc->conv()->asInteger (args[2]).asInteger();
if (type == 0)
{
int months = (date2.year() - date1.year()) * 12;
months += date2.month() - date1.month();
if (date2.day() < date1.day())
if (date2.day() != date2.daysInMonth())
--months;
return Value (months);
}
// type is now non-zero
// the number of full months in between, starting on 1/XX/XXXX
if (date1.month() == 12)
date1.setYMD(date1.year() + 1, 1, 1);
else
date1.setYMD(date1.year(), date1.month() + 1, 1);
date2.setYMD(date2.year(), date2.month(), 1);
int months = (date2.year() - date1.year()) * 12;
months += date2.month() - date1.month();
return Value (months);
}
// Function: weeks
Value func_weeks (valVector args, ValueCalc *calc, FuncExtra *)
{
TQDate date1 = calc->conv()->asDate (args[0]).asDate();
TQDate date2 = calc->conv()->asDate (args[1]).asDate();
if (!date1.isValid() || !date2.isValid())
return Value::errorVALUE();
int type = calc->conv()->asInteger (args[2]).asInteger();
int days = date1.daysTo (date2);
if (type == 0)
// just the number of full weeks between
return Value ((int) (days / 7));
// the number of full weeks between starting on mondays
int weekStartDay = calc->conv()->locale()->weekStartDay();
int dow1 = date1.dayOfWeek();
int dow2 = date2.dayOfWeek();
days -= (7 + (weekStartDay % 7) - dow1);
days -= ((dow2 - weekStartDay) % 7);
return Value ((int) (days / 7));
}
// Function: days
Value func_days (valVector args, ValueCalc *calc, FuncExtra *)
{
TQDate date1 = calc->conv()->asDate (args[0]).asDate();
TQDate date2 = calc->conv()->asDate (args[1]).asDate();
if (!date1.isValid() || !date2.isValid())
return Value::errorVALUE();
return Value (date1.daysTo (date2));
}
// Function: date
Value func_date (valVector args, ValueCalc *calc, FuncExtra *)
{
int y = calc->conv()->asInteger (args[0]).asInteger();
int m = calc->conv()->asInteger (args[1]).asInteger();
int d = calc->conv()->asInteger (args[2]).asInteger();
TQDate _date;
if( _date.setYMD (y, m, d))
return Value (_date);
return Value::errorVALUE();
}
// Function: day
Value func_dayname (valVector args, ValueCalc *calc, FuncExtra *)
{
int number = calc->conv()->asInteger (args[0]).asInteger();
TQString weekName = calc->conv()->locale()->calendar()->weekDayName (number);
if (weekName.isNull())
return Value::errorVALUE();
return Value (weekName);
}
// Function: monthname
Value func_monthname (valVector args, ValueCalc *calc, FuncExtra *)
{
int number = calc->conv()->asInteger (args[0]).asInteger();
TQString monthName = calc->conv()->locale()->calendar()->monthName (number,
TQDate::currentDate().year());
if (monthName.isNull())
return Value::errorVALUE();
return Value (monthName);
}
// Function: time
Value func_time (valVector args, ValueCalc *calc, FuncExtra *)
{
int h = calc->conv()->asInteger (args[0]).asInteger();
int m = calc->conv()->asInteger (args[1]).asInteger();
int s = calc->conv()->asInteger (args[2]).asInteger();
/* normalize the data */
m += s / 60;
s = s % 60;
h += m / 60;
m = m % 60;
// we'll lose hours data that carries over into days
h = h % 24;
// now carry down hours/minutes for negative minutes/seconds
if (s < 0) {
s += 60;
m -= 1;
}
if (m < 0) {
m += 60;
h -= 1;
}
if (h < 0)
h += 24;
return Value (TQTime (h, m, s));
}
// Function: currentDate
Value func_currentDate (valVector, ValueCalc *, FuncExtra *)
{
return Value (TQDate::currentDate ());
}
// Function: currentTime
Value func_currentTime (valVector, ValueCalc *, FuncExtra *)
{
return Value (TQTime::currentTime ());
}
// Function: currentDateTime
Value func_currentDateTime (valVector, ValueCalc *, FuncExtra *)
{
return Value (TQDateTime::currentDateTime ());
}
// Function: dayOfYear
Value func_dayOfYear (valVector args, ValueCalc *calc, FuncExtra *)
{
Value date = func_date (args, calc, 0);
if (date.isError()) return date;
return Value (date.asDate().dayOfYear());
}
// Function: daysInMonth
Value func_daysInMonth (valVector args, ValueCalc *calc, FuncExtra *)
{
int y = calc->conv()->asInteger (args[0]).asInteger();
int m = calc->conv()->asInteger (args[1]).asInteger();
TQDate date (y, m, 1);
return Value (date.daysInMonth());
}
// Function: isLeapYear
Value func_isLeapYear (valVector args, ValueCalc *calc, FuncExtra *)
{
int y = calc->conv()->asInteger (args[0]).asInteger();
return Value (TQDate::leapYear (y));
}
// Function: daysInYear
Value func_daysInYear (valVector args, ValueCalc *calc, FuncExtra *)
{
int y = calc->conv()->asInteger (args[0]).asInteger();
return Value (TQDate::leapYear (y) ? 366 : 365);
}
// Function: weeksInYear
Value func_weeksInYear (valVector args, ValueCalc *calc, FuncExtra *)
{
int y = calc->conv()->asInteger (args[0]).asInteger();
TQDate date (y, 12, 31); // last day of the year
return Value (date.weekNumber ());
}
// Function: easterSunday
Value func_easterSunday (valVector args, ValueCalc *calc, FuncExtra *)
{
int nDay, nMonth;
int nYear = calc->conv()->asInteger (args[0]).asInteger();
// (Tomas) the person who wrote this should be hanged :>
int B,C,D,E,F,G,H,I,K,L,M,N,O;
N = nYear % 19;
B = int(nYear / 100);
C = nYear % 100;
D = int(B / 4);
E = B % 4;
F = int((B + 8) / 25);
G = int((B - F + 1) / 3);
H = (19 * N + B - D - G + 15) % 30;
I = int(C / 4);
K = C % 4;
L = (32 + 2 * E + 2 * I - H - K) % 7;
M = int((N + 11 * H + 22 * L) / 451);
O = H + L - 7 * M + 114;
nDay = O % 31 + 1;
nMonth = int(O / 31);
return Value (TQDate (nYear, nMonth, nDay));
}
// Function: isoWeekNum
Value func_isoWeekNum (valVector args, ValueCalc *calc, FuncExtra *)
{
TQDate date = calc->conv()->asDate (args[0]).asDate();
if (!date.isValid())
return Value::errorVALUE();
return Value (date.weekNumber());
}
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