firefox-main/intl/components/src/calendar/ICU4XChineseBasedCalendar.cpp (file symbol)

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/intl/calendar/ICU4XChineseBasedCalendar.h"
#include "mozilla/Assertions.h"
namespace mozilla::intl::calendar {
ICU4XChineseBasedCalendar::ICU4XChineseBasedCalendar(
icu4x::capi::CalendarKind kind, const icu::Locale& locale,
UErrorCode& success)
: ICU4XCalendar(kind, locale, success) {}
ICU4XChineseBasedCalendar::ICU4XChineseBasedCalendar(
icu4x::capi::CalendarKind kind, const icu::TimeZone& timeZone,
const icu::Locale& locale, UErrorCode& success)
: ICU4XCalendar(kind, timeZone, locale, success) {}
ICU4XChineseBasedCalendar::ICU4XChineseBasedCalendar(
const ICU4XChineseBasedCalendar& other) = default;
ICU4XChineseBasedCalendar::~ICU4XChineseBasedCalendar() = default;
////////////////////////////////////////////
// ICU4XCalendar implementation overrides //
////////////////////////////////////////////
bool ICU4XChineseBasedCalendar::hasLeapMonths() const { return true; }
bool ICU4XChineseBasedCalendar::hasMonthCode(MonthCode monthCode) const {
return monthCode.ordinal() <= 12;
}
////////////////////////////////////////////
// icu::Calendar implementation overrides //
////////////////////////////////////////////
bool ICU4XChineseBasedCalendar::inTemporalLeapYear(UErrorCode& status) const {
int32_t days = getActualMaximum(UCAL_DAY_OF_YEAR, status);
if (U_FAILURE(status)) {
return false;
}
constexpr int32_t maxDaysInMonth = 30;
constexpr int32_t monthsInNonLeapYear = 12;
return days > (monthsInNonLeapYear * maxDaysInMonth);
}
void ICU4XChineseBasedCalendar::handleComputeFields(int32_t julianDay,
UErrorCode& status) {
int32_t gyear = getGregorianYear();
int32_t gmonth = getGregorianMonth() + 1;
int32_t gday = getGregorianDayOfMonth();
MOZ_ASSERT(1 <= gmonth && gmonth <= 12);
MOZ_ASSERT(1 <= gday && gday <= 31);
auto date = createICU4XDate(ISODate{gyear, gmonth, gday}, status);
if (U_FAILURE(status)) {
return;
}
MOZ_ASSERT(date);
MonthCode monthCode = monthCodeFrom(date.get());
int32_t extendedYear =
icu4x::capi::icu4x_Date_era_year_or_related_iso_mv1(date.get());
int32_t month = icu4x::capi::icu4x_Date_ordinal_month_mv1(date.get());
int32_t dayOfMonth = icu4x::capi::icu4x_Date_day_of_month_mv1(date.get());
int32_t dayOfYear = icu4x::capi::icu4x_Date_day_of_year_mv1(date.get());
MOZ_ASSERT(1 <= month && month <= 13);
MOZ_ASSERT(1 <= dayOfMonth && dayOfMonth <= 30);
MOZ_ASSERT(1 <= dayOfYear && dayOfYear <= (13 * 30));
// Difference between the Chinese calendar era (the extended year 1) and the
// start year used for cycle computations. This is the sixtieth year of reign
// of Huáng Dì. Other sources use the first year of reign, which means using
// -2697 instead. Both numbers result in the same year of cycle, but the
// latter number gives a different cycle number. To align with the ICU4C
// Chinese calendar implementation, we use -2637 here.
constexpr int32_t chineseCalendarYearDiff = -2637;
// Compute the cycle and year of cycle relative to the Chinese calendar, even
// when this is the Dangi calendar.
int32_t chineseCalendarYear = extendedYear - chineseCalendarYearDiff;
int32_t cycle_year = chineseCalendarYear - 1;
int32_t cycle = FloorDiv(cycle_year, 60);
int32_t yearOfCycle = cycle_year - (cycle * 60);
internalSet(UCAL_ERA, cycle + 1);
internalSet(UCAL_YEAR, yearOfCycle + 1);
internalSet(UCAL_EXTENDED_YEAR, extendedYear);
internalSet(UCAL_MONTH, monthCode.ordinal() - 1);
internalSet(UCAL_ORDINAL_MONTH, month - 1);
internalSet(UCAL_IS_LEAP_MONTH, monthCode.isLeapMonth() ? 1 : 0);
internalSet(UCAL_DAY_OF_MONTH, dayOfMonth);
internalSet(UCAL_DAY_OF_YEAR, dayOfYear);
}
// Limits table copied from i18n/chnsecal.cpp. Licensed under:
//
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
static const int32_t CHINESE_CALENDAR_LIMITS[UCAL_FIELD_COUNT][4] = {
// clang-format off
// Minimum Greatest Least Maximum
// Minimum Maximum
{ 1, 1, 83333, 83333}, // ERA
{ 1, 1, 60, 60}, // YEAR
{ 0, 0, 11, 11}, // MONTH
{ 1, 1, 50, 55}, // WEEK_OF_YEAR
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // WEEK_OF_MONTH
{ 1, 1, 29, 30}, // DAY_OF_MONTH
{ 1, 1, 353, 385}, // DAY_OF_YEAR
{/*N/A*/-1,/*N/A*/-1,/*N/A*/-1,/*N/A*/-1}, // DAY_OF_WEEK
{ -1, -1, 5, 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
{ 0, 0, 1, 1}, // IS_LEAP_MONTH
{ 0, 0, 11, 12}, // ORDINAL_MONTH
// clang-format on
};
int32_t ICU4XChineseBasedCalendar::handleGetLimit(UCalendarDateFields field,
ELimitType limitType) const {
return CHINESE_CALENDAR_LIMITS[field][limitType];
}
// Field resolution table copied from i18n/chnsecal.cpp. Licensed under:
//
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
const icu::UFieldResolutionTable
ICU4XChineseBasedCalendar::CHINESE_DATE_PRECEDENCE[] = {
// clang-format off
{
{ UCAL_DAY_OF_MONTH, kResolveSTOP },
{ UCAL_WEEK_OF_YEAR, UCAL_DAY_OF_WEEK, kResolveSTOP },
{ UCAL_WEEK_OF_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP },
{ UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP },
{ UCAL_WEEK_OF_YEAR, UCAL_DOW_LOCAL, kResolveSTOP },
{ UCAL_WEEK_OF_MONTH, UCAL_DOW_LOCAL, kResolveSTOP },
{ UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, kResolveSTOP },
{ UCAL_DAY_OF_YEAR, kResolveSTOP },
{ kResolveRemap | UCAL_DAY_OF_MONTH, UCAL_IS_LEAP_MONTH, kResolveSTOP },
{ kResolveSTOP }
},
{
{ UCAL_WEEK_OF_YEAR, kResolveSTOP },
{ UCAL_WEEK_OF_MONTH, kResolveSTOP },
{ UCAL_DAY_OF_WEEK_IN_MONTH, kResolveSTOP },
{ kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DAY_OF_WEEK, kResolveSTOP },
{ kResolveRemap | UCAL_DAY_OF_WEEK_IN_MONTH, UCAL_DOW_LOCAL, kResolveSTOP },
{ kResolveSTOP }
},
{{kResolveSTOP}}
// clang-format on
};
const icu::UFieldResolutionTable*
ICU4XChineseBasedCalendar::getFieldResolutionTable() const {
return CHINESE_DATE_PRECEDENCE;
}
} // namespace mozilla::intl::calendar