kcalendarsystemhebrew.cpp
/*
Copyright (c) 2003 Hans Petter Bieker <bieker@kde.org>
Calendar conversion routines based on Hdate v6, by Amos
Shapir 1978 (rev. 1985, 1992)
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, or (at your option) any later version.
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.
*/
// Derived hebrew kde calendar class
#include <klocale.h>
#include <kdebug.h>
#include "kcalendarsystemhebrew.h"
static int hebrewDaysElapsed(int y);
static QString num2heb(int num, bool includeMillenium);
class h_date
{
public:
int hd_day;
int hd_mon;
int hd_year;
int hd_dw;
int hd_flg;
};
/*
* compute general date structure from hebrew date
*/
static class h_date * hebrewToGregorian(int y, int m, int d)
{
static class h_date h;
int s;
y -= 3744;
s = hebrewDaysElapsed(y);
d += s;
s = hebrewDaysElapsed(y + 1) - s; /* length of year */
if (s > 365 && m > 6 )
{
--m;
d += 30;
}
d += (59 * (m - 1) + 1) / 2; /* regular months */
/* special cases */
if (s % 10 > 4 && m > 2) /* long Heshvan */
d++;
if (s % 10 < 4 && m > 3) /* short Kislev */
d--;
// ### HPB: Broken in leap years
//if (s > 365 && m > 6) /* leap year */
// d += 30;
d -= 6002;
y = (d + 36525) * 4 / 146097 - 1;
d -= y / 4 * 146097 + (y % 4) * 36524;
y *= 100;
/* compute year */
s = (d + 366)*4/1461-1;
d -= s/4*1461 + (s % 4)*365;
y += s;
/* compute month */
m = (d + 245)*12/367-7;
d -= m*367/12-30;
if (++m >= 12) {
m -= 12;
y++;
}
h.hd_day = d;
h.hd_mon = m;
h.hd_year = y;
return(&h);
}
/*
* compute date structure from no. of days since 1 Tishrei 3744
*/
static class h_date * gregorianToHebrew(int y, int m, int d)
{
static class h_date h;
int s;
if ((m -= 2) <= 0) {
m += 12;
y--;
}
/* no. of days, Julian calendar */
d += 365*y + y/4 + 367*m/12 + 5968;
/* Gregorian calendar */
d -= y/100-y/400-2;
h.hd_dw = (d + 1) % 7;
/* compute the year */
y += 16;
s = hebrewDaysElapsed(y);
m = hebrewDaysElapsed(y + 1);
while(d >= m) { /* computed year was underestimated */
s = m;
y++;
m = hebrewDaysElapsed(y + 1);
}
d -= s;
s = m-s; /* size of current year */
y += 3744;
h.hd_flg = s % 10-4;
/* compute day and month */
if (d >= s-236) { /* last 8 months are regular */
d -= s-236;
m = d*2/59;
d -= (m*59 + 1)/2;
m += 4;
if (s > 365 && m <= 5) /* Adar of Meuberet */
m += 8;
} else {
/* first 4 months have 117-119 days */
s = 114 + s % 10;
m = d * 4 / s;
d -= (m * s + 3) / 4;
}
h.hd_day = d;
h.hd_mon = m;
h.hd_year = y;
return(&h);
}
static QString num2heb(int num, bool includeMillenium)
{
const QChar decade[] = {0x05D8, 0x05D9, 0x05DB, 0x05DC, 0x05DE,
0x05E0, 0x05E1, 0x05E2, 0x05E4, 0x05E6};
QString result;
if (num < 1 || num > 9999)
return QString::number(num);
if (num >= 1000) {
if (includeMillenium || num % 1000 == 0)
result += QChar(0x05D0 - 1 + num / 1000);
num %= 1000;
}
if (num >= 100) {
while (num >= 500) {
result += QChar(0x05EA);
num -= 400;
}
result += QChar(0x05E7 - 1 + num / 100);
num %= 100;
}
if (num >= 10) {
if (num == 15 || num == 16)
num -= 9;
result += decade[num / 10];
num %= 10;
}
if (num > 0)
result += QChar(0x05D0 - 1 + num);
if (result.length() == 1)
result += "'";
else
result.insert(result.length() - 1, '\"');
return result;
}
/* constants, in 1/18th of minute */
static const int HOUR = 1080;
static const int DAY = 24*HOUR;
static const int WEEK = 7*DAY;
#define M(h,p) ((h)*HOUR+p)
#define MONTH (DAY+M(12,793))
static int hebrewDaysElapsed(int y)
{
int m, nm, dw, s, l;
l = y * 7 + 1; // no. of leap months
m = y*12+l/19; // total no. of months
l %= 19;
nm = m*MONTH+M(1+6,779); // molad new year 3744 (16BC) + 6 hours
s = m*28+nm/DAY-2;
nm %= WEEK;
dw = nm/DAY;
nm %= DAY;
// special cases of Molad Zaken
if (l < 12 && dw == 3 && nm >= M(9 + 6,204) ||
l < 7 && dw == 2 && nm>=M(15+6,589))
s++,dw++;
/* ADU */
if (dw == 1 || dw == 4 || dw == 6)
s++;
return s;
}
static int long_cheshvan(int year)
{
QDate first, last;
class h_date *gd;
gd = hebrewToGregorian(year, 1, 1);
first.setYMD(gd->hd_year, gd->hd_mon + 1, gd->hd_day + 1);
gd = hebrewToGregorian(year + 1, 1, 1);
last.setYMD(gd->hd_year, gd->hd_mon + 1, gd->hd_day + 1);
return (first.daysTo(last) % 10 == 5);
}
static int short_kislev(int year)
{
QDate first, last;
class h_date * gd;
gd = hebrewToGregorian(year, 1, 1);
first.setYMD(gd->hd_year, gd->hd_mon + 1, gd->hd_day + 1);
gd = hebrewToGregorian(year + 1, 1, 1);
last.setYMD(gd->hd_year, gd->hd_mon + 1, gd->hd_day + 1);
return (first.daysTo(last) % 10 == 3);
}
static bool is_leap_year(int year)
{
return ((((7 * year) + 1) % 19) < 7);
}
// Ok
KCalendarSystemHebrew::KCalendarSystemHebrew(const KLocale * locale)
: KCalendarSystem(locale)
{
}
// Ok
KCalendarSystemHebrew::~KCalendarSystemHebrew()
{
}
// Ok
static class h_date * toHebrew(const QDate & date)
{
class h_date *sd;
sd = gregorianToHebrew(date.year(), date.month(), date.day());
++sd->hd_mon;
++sd->hd_day;
return sd;
}
// Ok
int KCalendarSystemHebrew::year(const QDate& date) const
{
class h_date *sd = toHebrew(date);
return sd->hd_year;
}
// Ok
int KCalendarSystemHebrew::monthsInYear( const QDate & date ) const
{
if ( is_leap_year( year(date) ) )
return 13;
else
return 12;
}
// Ok
int KCalendarSystemHebrew::weeksInYear(int year) const
{
QDate temp;
setYMD(temp, year, 1, 1); // don't pass an uninitialized QDate to
// monthsInYear in the next call
setYMD(temp, year, monthsInYear(temp), hndays(monthsInYear(temp), year) );
int nWeekNumber = weekNumber(temp);
if(nWeekNumber == 1) // last week belongs to next year
{
temp = temp.addDays(-7);
nWeekNumber = weekNumber(temp);
}
return nWeekNumber;
}
int KCalendarSystemHebrew::weekNumber(const QDate& date, int * yearNum) const
{
QDate firstDayWeek1, lastDayOfYear;
int y = year(date);
int week;
int weekDay1, dayOfWeek1InYear;
// let's guess 1st day of 1st week
setYMD(firstDayWeek1, y, 1, 1);
weekDay1 = dayOfWeek(firstDayWeek1);
// iso 8601: week 1 is the first containing thursday and week starts on
// monday
if (weekDay1 > 4 /*Thursday*/)
firstDayWeek1 = addDays(firstDayWeek1 , 7 - weekDay1 + 1); // next monday
dayOfWeek1InYear = dayOfYear(firstDayWeek1);
if ( dayOfYear(date) < dayOfWeek1InYear ) // our date in prev year's week
{
if ( yearNum )
*yearNum = y - 1;
return weeksInYear(y - 1);
}
// let's check if its last week belongs to next year
setYMD(lastDayOfYear, y + 1, 1, 1);
lastDayOfYear = addDays(lastDayOfYear, -1);
if ( (dayOfYear(date) >= daysInYear(date) - dayOfWeek(lastDayOfYear) + 1)
// our date is in last week
&& dayOfWeek(lastDayOfYear) < 4) // 1st week in next year has thursday
{
if ( yearNum )
*yearNum = y + 1;
week = 1;
}
else
{
if( weekDay1 < 5 ) // To calculate properly the number of weeks
// from day a to x let's make a day 1 of week
firstDayWeek1 = addDays( firstDayWeek1, -( weekDay1 - 1));
week = firstDayWeek1.daysTo(date) / 7 + 1;
}
return week;
}
// Ok
QString KCalendarSystemHebrew::monthName(const QDate& date,
bool shortName) const
{
return monthName(month(date), year(date), shortName);
}
// Ok
QString KCalendarSystemHebrew::monthNamePossessive(const QDate& date,
bool shortName) const
{
return monthNamePossessive(month(date), year(date), shortName);
}
// ### Fixme
QString KCalendarSystemHebrew::monthName(int month, int year, bool /*shortName*/) const
{
if ( month < 1 )
return QString::null;
if ( is_leap_year(year) )
{
if ( month > 13 )
return QString::null;
}
else if ( month > 12 )
return QString::null;
// We must map conversion algorithm month index to real index
if( month == 6 && is_leap_year(year) )
month = 13; /*Adar I*/
else if ( month == 7 && is_leap_year(year) )
month = 14; /*Adar II*/
else if ( month > 7 && is_leap_year(year) )
month--; //Because of Adar II
switch(month)
{
case 1:
return locale()->translate("Tishrey");
case 2:
return locale()->translate("Heshvan");
case 3:
return locale()->translate("Kislev");
case 4:
return locale()->translate("Tevet");
case 5:
return locale()->translate("Shvat");
case 6:
return locale()->translate("Adar");
case 7:
return locale()->translate("Nisan");
case 8:
return locale()->translate("Iyar");
case 9:
return locale()->translate("Sivan");
case 10:
return locale()->translate("Tamuz");
case 11:
return locale()->translate("Av");
case 12:
return locale()->translate("Elul");
case 13:
return locale()->translate("Adar I");
case 14:
return locale()->translate("Adar II");
default:
break;
}
return QString::null;
}
// ### Fixme
QString KCalendarSystemHebrew::monthNamePossessive(int month, int year,
bool shortName) const
{
return "of " + monthName(month, year, shortName);
}
bool KCalendarSystemHebrew::setYMD(QDate & date, int y, int m, int d) const
{
if( y < minValidYear() || y > maxValidYear() )
return false;
if( m < 1 || m > (is_leap_year(y) ? 13 : 12) )
return false;
if( d < 1 || d > hndays(m,y) )
return false;
class h_date * gd = hebrewToGregorian( y, m, d );
return date.setYMD(gd->hd_year, gd->hd_mon + 1, gd->hd_day + 1);
}
QString KCalendarSystemHebrew::weekDayName(int day, bool shortName) const
{
return KCalendarSystem::weekDayName(day, shortName);
}
// Ok
QString KCalendarSystemHebrew::weekDayName(const QDate& date,
bool shortName) const
{
return weekDayName(dayOfWeek(date), shortName);
}
// Ok
int KCalendarSystemHebrew::dayOfWeek(const QDate& date) const
{
class h_date *sd = toHebrew(date);
if ( sd->hd_dw == 0 )
return 7;
else
return (sd->hd_dw);
}
// Ok
int KCalendarSystemHebrew::dayOfYear(const QDate & date) const
{
QDate first;
setYMD(first, year(date), 1, 1);
return first.daysTo(date) + 1;
}
int KCalendarSystemHebrew::daysInMonth(const QDate& date) const
{
return hndays(month(date), year(date));
}
int KCalendarSystemHebrew::hndays(int mon, int year) const
{
if ( mon == 6 && is_leap_year(year) )
mon = 13; /*Adar I*/
else if ( mon == 7 && is_leap_year(year) )
mon = 14; /*Adar II*/
else if ( mon > 7 && is_leap_year(year) )
mon--; //Because of Adar II
if( mon == 8 /*IYYAR*/ || mon == 10 /*TAMUZ*/ ||
mon == 12 /*ELUL*/ || mon == 4 /*TEVET*/ ||
mon == 14 /*ADAR 2*/||
( mon == 6 /*ADAR*/ && !is_leap_year(year)) ||
(mon == 2 /*CHESHVAN*/ && !long_cheshvan(year)) ||
(mon == 3 /*KISLEV*/ && short_kislev(year)))
return 29;
else
return 30;
}
// Ok
// Min valid year that may be converted to QDate
int KCalendarSystemHebrew::minValidYear() const
{
QDate date(1753, 1, 1);
return year(date);
}
// Ok
// Max valid year that may be converted to QDate
int KCalendarSystemHebrew::maxValidYear() const
{
QDate date(8000, 1, 1);
return year(date);
}
// Ok
int KCalendarSystemHebrew::day(const QDate& date) const
{
class h_date *sd = toHebrew(date);
return sd->hd_day;
}
// Ok
int KCalendarSystemHebrew::month(const QDate& date) const
{
class h_date *sd = toHebrew(date);
int month = sd->hd_mon;
if ( is_leap_year( sd->hd_year ) )
{
if( month == 13 /*AdarI*/ )
month = 6;
else if( month == 14 /*AdarII*/ )
month = 7;
else if ( month > 6 && month < 13 )
++month;
}
return month;
}
// Ok
int KCalendarSystemHebrew::daysInYear(const QDate & date) const
{
QDate first, last;
setYMD(first, year(date), 1, 1); // 1 Tishrey
setYMD(last, year(date) + 1, 1, 1); // 1 Tishrey the year later
return first.daysTo(last);
}
// Ok
int KCalendarSystemHebrew::weekDayOfPray() const
{
return 6; // saturday
}
// Ok
QDate KCalendarSystemHebrew::addDays( const QDate & date, int ndays ) const
{
return date.addDays( ndays );
}
// Ok
QDate KCalendarSystemHebrew::addMonths( const QDate & date, int nmonths ) const
{
QDate result = date;
while ( nmonths > 0 )
{
result = addDays(result, daysInMonth(result));
--nmonths;
}
while ( nmonths < 0 )
{
// get the number of days in the previous month to be consistent with
// addMonths where nmonths > 0
int nDaysInMonth = daysInMonth(addDays(result, -day(result)));
result = addDays(result, -nDaysInMonth);
++nmonths;
}
return result;
}
// Ok
QDate KCalendarSystemHebrew::addYears( const QDate & date, int nyears ) const
{
QDate result = date;
int y = year(date) + nyears;
setYMD( result, y, month(date), day(date) );
return result;
}
// Ok
QString KCalendarSystemHebrew::calendarName() const
{
return QString::fromLatin1("hebrew");
}
// Ok
bool KCalendarSystemHebrew::isLunar() const
{
return false;
}
// Ok
bool KCalendarSystemHebrew::isLunisolar() const
{
return true;
}
// Ok
bool KCalendarSystemHebrew::isSolar() const
{
return false;
}
QString KCalendarSystemHebrew::dayString(const QDate & pDate, bool bShort) const
{
QString sResult;
// Only use hebrew numbers if the hebrew setting is selected
if (locale()->language() == QString::fromLatin1("he"))
sResult = num2heb(day(pDate), false);
else
sResult = KCalendarSystem::dayString(pDate, bShort);
return sResult;
}
QString KCalendarSystemHebrew::yearString(const QDate & pDate, bool bShort) const
{
QString sResult;
// Only use hebrew numbers if the hebrew setting is selected
if (locale()->language() == QString::fromLatin1("he"))
sResult = num2heb(year(pDate), !bShort);
else
sResult = KCalendarSystem::yearString(pDate, bShort);
return sResult;
}
static int heb2num(const QString& str, int & iLength) {
QChar c;
QString s = str;
int result = 0;
iLength = 0;
int decadeValues[14] = {10, 20, 20, 30, 40, 40, 50,
50, 60, 70, 80, 80, 90, 90};
uint pos;
for (pos = 0 ; pos < s.length() ; pos++)
{
c = s[pos];
if (s.length() > pos && (s[pos + 1] == QChar('\'') ||
s[pos + 1] == QChar('\"')))
{
iLength++;
s.remove(pos + 1, 1);
}
if (c >= QChar(0x05D0) && c <= QChar(0x05D7))
{
if (s.length() > pos && s[pos + 1] >= QChar(0x05D0) &&
s[pos + 1] <= QChar(0x05EA))
result += (c.unicode() - 0x05D0 + 1) * 1000;
else
result += c.unicode() - 0x05D0 + 1;
}
else if (c == QChar(0x05D8))
{
if (s.length() > pos && s[pos + 1] >= QChar(0x05D0) &&
s[pos + 1] <= QChar(0x05EA) && s[pos + 1] != QChar(0x05D5) &&
s[pos + 1] != QChar(0x05D6))
result += 9000;
else
result += 9;
}
else if (c >= QChar(0x05D9) && c <= QChar(0x05E6))
{
if (s.length() > pos && s[pos + 1] >= QChar(0x05D9))
return -1;
else
result += decadeValues[c.unicode() - 0x05D9];
}
else if (c >= QChar(0x05E7) && c <= QChar(0x05EA))
{
result += (c.unicode() - 0x05E7 + 1) * 100;
}
else
{
break;
}
}
iLength += pos;
return result;
}
int KCalendarSystemHebrew::dayStringToInteger(const QString & sNum, int & iLength) const
{
int iResult;
if (locale()->language() == "he")
iResult= heb2num(sNum, iLength);
else
iResult = KCalendarSystem::yearStringToInteger(sNum, iLength);
return iResult;
}
int KCalendarSystemHebrew::yearStringToInteger(const QString & sNum, int & iLength) const
{
int iResult;
if (locale()->language() == "he")
iResult = heb2num(sNum, iLength);
else
iResult = KCalendarSystem::yearStringToInteger(sNum, iLength);
if (iResult < 1000)
iResult += 5000; // assume we're in the 6th millenium (y6k bug)
return iResult;
}
KCalendarSystem::weekDayName
virtual QString weekDayName(int weekDay, bool shortName=false) const =0
Gets specific calendar type week day name If an invalid week day is specified, QString::null is retur...
Definition: kcalendarsystem.cpp:119
klocale.h
KCalendarSystem
CalendarSystem abstract class, default derived kde gregorian class and factory class.
Definition: kcalendarsystem.h:42
KCalendarSystem::yearString
virtual QString yearString(const QDate &pDate, bool bShort) const
Converts a date into a year literal.
Definition: kcalendarsystem.cpp:77
KCalendarSystem::yearStringToInteger
virtual int yearStringToInteger(const QString &sNum, int &iLength) const
Converts a year literal of a part of a string into a integer starting at the beginning of the string...
Definition: kcalendarsystem.cpp:114
KLocale
KLocale provides support for country specific stuff like the national language.
Definition: klocale.h:124
KCalendarSystem::dayString
virtual QString dayString(const QDate &pDate, bool bShort) const
Converts a date into a day literal.
Definition: kcalendarsystem.cpp:55

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