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//
// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
// Copyright (c) 2021-2024 Alexander Grund
//
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/locale/date_time.hpp>
#include <boost/locale/date_time_facet.hpp>
#include <boost/locale/formatting.hpp>
#include <boost/locale/hold_ptr.hpp>
#include "all_generator.hpp"
#include "cdata.hpp"
#include "icu_util.hpp"
#include "time_zone.hpp"
#include "uconv.hpp"
#include <boost/thread.hpp>
#include <cmath>
#include <memory>
#include <unicode/calendar.h>
#include <unicode/gregocal.h>
#include <unicode/utypes.h>
namespace boost { namespace locale { namespace impl_icu {
static void check_and_throw_dt(UErrorCode& e)
{
if(U_FAILURE(e))
throw date_time_error(u_errorName(e));
}
using period::marks::period_mark;
static UCalendarDateFields to_icu(period::marks::period_mark f)
{
using namespace period::marks;
switch(f) {
case era: return UCAL_ERA;
case year: return UCAL_YEAR;
case extended_year: return UCAL_EXTENDED_YEAR;
case month: return UCAL_MONTH;
case day: return UCAL_DATE;
case day_of_year: return UCAL_DAY_OF_YEAR;
case day_of_week: return UCAL_DAY_OF_WEEK;
case day_of_week_in_month: return UCAL_DAY_OF_WEEK_IN_MONTH;
case day_of_week_local: return UCAL_DOW_LOCAL;
case hour: return UCAL_HOUR_OF_DAY;
case hour_12: return UCAL_HOUR;
case am_pm: return UCAL_AM_PM;
case minute: return UCAL_MINUTE;
case second: return UCAL_SECOND;
case week_of_year: return UCAL_WEEK_OF_YEAR;
case week_of_month: return UCAL_WEEK_OF_MONTH;
case first_day_of_week:
case invalid: break;
}
throw std::invalid_argument("Invalid date_time period type"); // LCOV_EXCL_LINE
}
class calendar_impl : public abstract_calendar {
public:
calendar_impl(const cdata& dat)
{
UErrorCode err = U_ZERO_ERROR;
calendar_.reset(icu::Calendar::createInstance(dat.locale(), err));
// Use accuracy of seconds, see #221
const double rounded_time = std::floor(calendar_->getTime(err) / U_MILLIS_PER_SECOND) * U_MILLIS_PER_SECOND;
calendar_->setTime(rounded_time, err);
check_and_throw_dt(err);
encoding_ = dat.encoding();
}
calendar_impl(const calendar_impl& other)
{
calendar_.reset(other.calendar_->clone());
encoding_ = other.encoding_;
}
calendar_impl* clone() const override { return new calendar_impl(*this); }
void set_value(period::marks::period_mark p, int value) override { calendar_->set(to_icu(p), int32_t(value)); }
int get_value(period::marks::period_mark p, value_type type) const override
{
UErrorCode err = U_ZERO_ERROR;
int v = 0;
if(p == period::marks::first_day_of_week) {
guard l(lock_);
v = calendar_->getFirstDayOfWeek(err);
} else {
UCalendarDateFields field = to_icu(p);
guard l(lock_);
switch(type) {
case absolute_minimum: v = calendar_->getMinimum(field); break;
case actual_minimum: v = calendar_->getActualMinimum(field, err); break;
case greatest_minimum: v = calendar_->getGreatestMinimum(field); break;
case current: v = calendar_->get(field, err); break;
case least_maximum: v = calendar_->getLeastMaximum(field); break;
case actual_maximum: v = calendar_->getActualMaximum(field, err); break;
case absolute_maximum: v = calendar_->getMaximum(field); break;
}
}
check_and_throw_dt(err);
return v;
}
void normalize() override
{
// Can't call complete() explicitly (protected)
// calling get which calls complete
UErrorCode code = U_ZERO_ERROR;
calendar_->get(UCAL_YEAR, code);
check_and_throw_dt(code);
}
void set_time(const posix_time& p) override
{
// Ignore `p.nanoseconds / 1e6` for simplicity of users as there is no
// easy way to set the sub-seconds via `date_time`.
// Matches behavior of other backends that only have seconds resolution
const double utime = p.seconds * 1e3;
UErrorCode code = U_ZERO_ERROR;
calendar_->setTime(utime, code);
check_and_throw_dt(code);
}
posix_time get_time() const override
{
const double timeMs = get_time_ms();
posix_time res;
res.seconds = static_cast<int64_t>(std::floor(timeMs / 1e3));
const double remainTimeMs = std::fmod(timeMs, 1e3); // = timeMs - seconds * 1000
constexpr uint32_t ns_in_s = static_cast<uint32_t>(1000) * 1000 * 1000;
res.nanoseconds = std::min(static_cast<uint32_t>(remainTimeMs * 1e6), ns_in_s - 1u);
return res;
}
double get_time_ms() const override
{
UErrorCode code = U_ZERO_ERROR;
double result;
{
guard l(lock_);
result = calendar_->getTime(code);
}
check_and_throw_dt(code);
return result;
}
void set_option(calendar_option_type opt, int /*v*/) override
{
switch(opt) {
case is_gregorian: throw date_time_error("is_gregorian is not settable options for calendar");
case is_dst: throw date_time_error("is_dst is not settable options for calendar");
}
throw std::invalid_argument("Invalid option type"); // LCOV_EXCL_LINE
}
int get_option(calendar_option_type opt) const override
{
switch(opt) {
case is_gregorian: return icu_cast<const icu::GregorianCalendar>(calendar_.get()) != nullptr;
case is_dst: {
guard l(lock_);
UErrorCode err = U_ZERO_ERROR;
bool res = (calendar_->inDaylightTime(err) != 0);
check_and_throw_dt(err);
return res;
}
}
throw std::invalid_argument("Invalid option type"); // LCOV_EXCL_LINE
}
void adjust_value(period::marks::period_mark p, update_type u, int difference) override
{
UErrorCode err = U_ZERO_ERROR;
switch(u) {
case move: calendar_->add(to_icu(p), difference, err); break;
case roll: calendar_->roll(to_icu(p), difference, err); break;
}
check_and_throw_dt(err);
}
int difference(const abstract_calendar& other, period::marks::period_mark m) const override
{
// era can't be queried via fieldDifference
if(BOOST_UNLIKELY(m == period::marks::era))
return get_value(m, value_type::current) - other.get_value(m, value_type::current);
const double other_time_ms = other.get_time_ms();
// fieldDifference has side effect of moving calendar (WTF?)
// So we clone it for performing this operation
hold_ptr<icu::Calendar> self(calendar_->clone());
UErrorCode err = U_ZERO_ERROR;
const int diff = self->fieldDifference(other_time_ms, to_icu(m), err);
check_and_throw_dt(err);
return diff;
}
void set_timezone(const std::string& tz) override { calendar_->adoptTimeZone(get_time_zone(tz)); }
std::string get_timezone() const override
{
icu::UnicodeString tz;
calendar_->getTimeZone().getID(tz);
icu_std_converter<char> cvt(encoding_);
return cvt.std(tz);
}
bool same(const abstract_calendar* other) const override
{
const calendar_impl* oc = dynamic_cast<const calendar_impl*>(other);
if(!oc)
return false;
return calendar_->isEquivalentTo(*oc->calendar_) != 0;
}
private:
typedef boost::unique_lock<boost::mutex> guard;
mutable boost::mutex lock_;
std::string encoding_;
hold_ptr<icu::Calendar> calendar_;
};
class icu_calendar_facet : public calendar_facet {
public:
icu_calendar_facet(const cdata& d, size_t refs = 0) : calendar_facet(refs), data_(d) {}
abstract_calendar* create_calendar() const override { return new calendar_impl(data_); }
private:
cdata data_;
};
std::locale create_calendar(const std::locale& in, const cdata& d)
{
return std::locale(in, new icu_calendar_facet(d));
}
}}} // namespace boost::locale::impl_icu
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