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//
// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
//
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#ifndef BOOST_LOCALE_DATE_TIME_FACET_HPP_INCLUDED
#define BOOST_LOCALE_DATE_TIME_FACET_HPP_INCLUDED
#include <boost/locale/config.hpp>
#include <boost/locale/detail/facet_id.hpp>
#include <cstdint>
#include <locale>
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable : 4275 4251 4231 4660)
#endif
namespace boost { namespace locale {
/// \brief Namespace that contains various types for manipulation with dates
namespace period {
/// \brief This namespace holds a enum of various period types like era, year, month, etc..
namespace marks {
/// \brief the type that defines a flag that holds a period identifier
enum period_mark {
invalid, ///< Special invalid value, should not be used directly
era, ///< Era i.e. AC, BC in Gregorian and Julian calendar, range [0,1]
year, ///< Year, it is calendar specific, for example 2011 in Gregorian calendar.
extended_year, ///< Extended year for Gregorian/Julian calendars, where 1 BC == 0, 2 BC == -1.
month, ///< The month of year, calendar specific, in Gregorian [0..11]
day, ///< The day of month, calendar specific, in Gregorian [1..31]
day_of_year, ///< The number of day in year, starting from 1, in Gregorian [1..366]
day_of_week, ///< Day of week, Sunday=1, Monday=2,..., Saturday=7.
///< Note that updating this value respects local day of week, so for example,
///< If first day of week is Monday and the current day is Tuesday then setting
///< the value to Sunday (1) would forward the date by 5 days forward and not backward
///< by two days as it could be expected if the numbers were taken as is.
day_of_week_in_month, ///< Original number of the day of the week in month. For example 1st Sunday,
///< 2nd Sunday, etc. in Gregorian [1..5]
day_of_week_local, ///< Local day of week, for example in France Monday is 1, in US Sunday is 1, [1..7]
hour, ///< 24 clock hour [0..23]
hour_12, ///< 12 clock hour [0..11]
am_pm, ///< am or pm marker [0..1]
minute, ///< minute [0..59]
second, ///< second [0..59]
week_of_year, ///< The week number in the year
week_of_month, ///< The week number within current month
first_day_of_week, ///< First day of week, constant, for example Sunday in US = 1, Monday in France = 2
};
} // namespace marks
/// \brief This class holds a type that represents certain period of time like
/// year, hour, second and so on.
///
/// It can be created from either marks::period_mark type or by using shortcuts in period
/// namespace - calling functions like period::year(), period::hour() and so on.
///
/// Basically it represents the same object as enum marks::period_mark but allows to
/// provide save operator overloading that would not collide with casing of enum to
/// numeric values.
class period_type {
public:
/// Create a period of specific type, default is invalid.
period_type(marks::period_mark m = marks::invalid) : mark_(m) {}
/// Get the value of marks::period_mark it was created with.
marks::period_mark mark() const { return mark_; }
/// Check if two periods are the same
bool operator==(const period_type& other) const { return mark() == other.mark(); }
/// Check if two periods are different
bool operator!=(const period_type& other) const { return mark() != other.mark(); }
private:
marks::period_mark mark_;
};
} // namespace period
/// Structure that define POSIX time, seconds and milliseconds
/// since Jan 1, 1970, 00:00 not including leap seconds.
struct posix_time {
int64_t seconds; ///< Seconds since epoch
uint32_t nanoseconds; ///< Nanoseconds resolution
};
/// This class defines generic calendar class, it is used by date_time and calendar
/// objects internally. It is less useful for end users, but it is build for localization
/// backend implementation
class BOOST_SYMBOL_VISIBLE abstract_calendar {
public:
/// Type that defines how to fetch the value
enum value_type {
absolute_minimum, ///< Absolute possible minimum for the value, for example for day is 1
actual_minimum, ///< Actual minimal value for this period.
greatest_minimum, ///< Maximal minimum value that can be for this period
current, ///< Current value of this period
least_maximum, ///< The last maximal value for this period, For example for Gregorian calendar
///< day it is 28
actual_maximum, ///< Actual maximum, for it can be 28, 29, 30, 31 for day according to current month
absolute_maximum, ///< Maximal value, for Gregorian day it would be 31.
};
/// A way to update the value
enum update_type {
move, ///< Change the value up or down effecting others for example 1990-12-31 + 1 day = 1991-01-01
roll, ///< Change the value up or down not effecting others for example 1990-12-31 + 1 day = 1990-12-01
};
/// Information about calendar
enum calendar_option_type {
is_gregorian, ///< Check if the calendar is Gregorian
is_dst ///< Check if the current time is in daylight time savings
};
/// Make a polymorphic copy of the calendar
virtual abstract_calendar* clone() const = 0;
/// Set specific \a value for period \a p, note not all values are settable.
///
/// After calling set_value you may want to call normalize() function to make sure
/// all periods are updated, if you set several fields that are part of a single
/// date/time representation you should call set_value several times and then
/// call normalize().
///
/// If normalize() is not called after set_value, the behavior is undefined
virtual void set_value(period::marks::period_mark m, int value) = 0;
/// Recalculate all periods after setting them, should be called after use of set_value() function.
virtual void normalize() = 0;
/// Get specific value for period \a p according to a value_type \a v
virtual int get_value(period::marks::period_mark m, value_type v) const = 0;
/// Set current time point
virtual void set_time(const posix_time& p) = 0;
/// Get current time point
virtual posix_time get_time() const = 0;
/// Get current time since epoch in milliseconds
virtual double get_time_ms() const = 0;
/// Set option for calendar, for future use
virtual void set_option(calendar_option_type opt, int v) = 0;
/// Get option for calendar, currently only check if it is Gregorian calendar
virtual int get_option(calendar_option_type opt) const = 0;
/// Adjust period's \a p value by \a difference items using a update_type \a u.
/// Note: not all values are adjustable
virtual void adjust_value(period::marks::period_mark m, update_type u, int difference) = 0;
/// Calculate the difference between this calendar and \a other in \a p units
virtual int difference(const abstract_calendar& other, period::marks::period_mark m) const = 0;
/// Set time zone, empty - use system
virtual void set_timezone(const std::string& tz) = 0;
/// Get current time zone, empty - system one
virtual std::string get_timezone() const = 0;
/// Check of two calendars have same rules
virtual bool same(const abstract_calendar* other) const = 0;
virtual ~abstract_calendar() = default;
};
/// \brief the facet that generates calendar for specific locale
class BOOST_SYMBOL_VISIBLE calendar_facet : public std::locale::facet, public detail::facet_id<calendar_facet> {
public:
/// Basic constructor
calendar_facet(size_t refs = 0) : std::locale::facet(refs) {}
/// Create a new calendar that points to current point of time.
virtual abstract_calendar* create_calendar() const = 0;
};
}} // namespace boost::locale
#ifdef BOOST_MSVC
# pragma warning(pop)
#endif
#endif
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