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/*
*******************************************************************************
* Copyright (C) 2003 - 2009, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "cecal.h"
#include "gregoimp.h" //Math
U_NAMESPACE_BEGIN
static const int32_t LIMITS[UCAL_FIELD_COUNT][4] = {
// Minimum Greatest Least Maximum
// Minimum Maximum
{ 0, 0, 1, 1}, // ERA
{ 1, 1, 5000000, 5000000}, // YEAR
{ 0, 0, 12, 12}, // MONTH
{ 1, 1, 52, 53}, // WEEK_OF_YEAR
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH
{ 1, 1, 5, 30}, // DAY_OF_MONTH
{ 1, 1, 365, 366}, // DAY_OF_YEAR
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
{ -1, -1, 1, 5}, // DAY_OF_WEEK_IN_MONTH
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // AM_PM
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // HOUR_OF_DAY
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MINUTE
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // SECOND
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECOND
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // ZONE_OFFSET
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DST_OFFSET
{ -5000000, -5000000, 5000000, 5000000}, // YEAR_WOY
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DOW_LOCAL
{ -5000000, -5000000, 5000000, 5000000}, // EXTENDED_YEAR
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // JULIAN_DAY
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // MILLISECONDS_IN_DAY
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // IS_LEAP_MONTH
};
//-------------------------------------------------------------------------
// Constructors...
//-------------------------------------------------------------------------
CECalendar::CECalendar(const Locale& aLocale, UErrorCode& success)
: Calendar(TimeZone::createDefault(), aLocale, success)
{
setTimeInMillis(getNow(), success);
}
CECalendar::CECalendar (const CECalendar& other)
: Calendar(other)
{
}
CECalendar::~CECalendar()
{
}
CECalendar&
CECalendar::operator=(const CECalendar& right)
{
Calendar::operator=(right);
return *this;
}
//-------------------------------------------------------------------------
// Calendar framework
//-------------------------------------------------------------------------
int32_t
CECalendar::handleComputeMonthStart(int32_t eyear,int32_t emonth, UBool /*useMonth*/) const
{
return ceToJD(eyear, emonth, 0, getJDEpochOffset());
}
int32_t
CECalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const
{
return LIMITS[field][limitType];
}
UBool
CECalendar::inDaylightTime(UErrorCode& status) const
{
if (U_FAILURE(status) || !getTimeZone().useDaylightTime()) {
return FALSE;
}
// Force an update of the state of the Calendar.
((CECalendar*)this)->complete(status); // cast away const
return (UBool)(U_SUCCESS(status) ? (internalGet(UCAL_DST_OFFSET) != 0) : FALSE);
}
UBool
CECalendar::haveDefaultCentury() const
{
return TRUE;
}
//-------------------------------------------------------------------------
// Calendar system Conversion methods...
//-------------------------------------------------------------------------
int32_t
CECalendar::ceToJD(int32_t year, int32_t month, int32_t date, int32_t jdEpochOffset)
{
// handle month > 12, < 0 (e.g. from add/set)
if ( month >= 0 ) {
year += month/13;
month %= 13;
} else {
++month;
year += month/13 - 1;
month = month%13 + 12;
}
return (int32_t) (
jdEpochOffset // difference from Julian epoch to 1,1,1
+ 365 * year // number of days from years
+ ClockMath::floorDivide(year, 4) // extra day of leap year
+ 30 * month // number of days from months (months are 0-based)
+ date - 1 // number of days for present month (1 based)
);
}
void
CECalendar::jdToCE(int32_t julianDay, int32_t jdEpochOffset, int32_t& year, int32_t& month, int32_t& day)
{
int32_t c4; // number of 4 year cycle (1461 days)
int32_t r4; // remainder of 4 year cycle, always positive
c4 = ClockMath::floorDivide(julianDay - jdEpochOffset, 1461, r4);
year = 4 * c4 + (r4/365 - r4/1460); // 4 * <number of 4year cycle> + <years within the last cycle>
int32_t doy = (r4 == 1460) ? 365 : (r4 % 365); // days in present year
month = doy / 30; // 30 -> Coptic/Ethiopic month length up to 12th month
day = (doy % 30) + 1; // 1-based days in a month
}
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
//eof
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