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Diffstat (limited to 'intl/icu/source/i18n/cecal.cpp')
| -rw-r--r-- | intl/icu/source/i18n/cecal.cpp | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/cecal.cpp b/intl/icu/source/i18n/cecal.cpp new file mode 100644 index 0000000000..00faa8ac07 --- /dev/null +++ b/intl/icu/source/i18n/cecal.cpp @@ -0,0 +1,151 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* 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 |