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