diff options
Diffstat (limited to 'ext/date/lib/date.rb')
| -rw-r--r-- | ext/date/lib/date.rb | 1590 |
1 files changed, 2 insertions, 1588 deletions
diff --git a/ext/date/lib/date.rb b/ext/date/lib/date.rb index c6448017f7..d235d76e6f 100644 --- a/ext/date/lib/date.rb +++ b/ext/date/lib/date.rb @@ -1,239 +1,10 @@ -# -# date.rb - date and time library -# -# Author: Tadayoshi Funaba 1998-2011 -# -# Documentation: William Webber <william@williamwebber.com> -# -# == Overview -# -# This file provides two classes for working with -# dates and times. -# -# The first class, Date, represents dates. -# It works with years, months, weeks, and days. -# See the Date class documentation for more details. -# -# The second, DateTime, extends Date to include hours, -# minutes, seconds, and fractions of a second. It -# provides basic support for time zones. See the -# DateTime class documentation for more details. -# -# === Ways of calculating the date. -# -# In common usage, the date is reckoned in years since or -# before the Common Era (CE/BCE, also known as AD/BC), then -# as a month and day-of-the-month within the current year. -# This is known as the *Civil* *Date*, and abbreviated -# as +civil+ in the Date class. -# -# Instead of year, month-of-the-year, and day-of-the-month, -# the date can also be reckoned in terms of year and -# day-of-the-year. This is known as the *Ordinal* *Date*, -# and is abbreviated as +ordinal+ in the Date class. (Note -# that referring to this as the Julian date is incorrect.) -# -# The date can also be reckoned in terms of year, week-of-the-year, -# and day-of-the-week. This is known as the *Commercial* -# *Date*, and is abbreviated as +commercial+ in the -# Date class. The commercial week runs Monday (day-of-the-week -# 1) to Sunday (day-of-the-week 7), in contrast to the civil -# week which runs Sunday (day-of-the-week 0) to Saturday -# (day-of-the-week 6). The first week of the commercial year -# starts on the Monday on or before January 1, and the commercial -# year itself starts on this Monday, not January 1. -# -# For scientific purposes, it is convenient to refer to a date -# simply as a day count, counting from an arbitrary initial -# day. The date first chosen for this was January 1, 4713 BCE. -# A count of days from this date is the *Julian* *Day* *Number* -# or *Julian* *Date*, which is abbreviated as +jd+ in the -# Date class. This is in local time, and counts from midnight -# on the initial day. The stricter usage is in UTC, and counts -# from midday on the initial day. This is referred to in the -# Date class as the *Astronomical* *Julian* *Day* *Number*, and -# abbreviated as +ajd+. In the Date class, the Astronomical -# Julian Day Number includes fractional days. -# -# Another absolute day count is the *Modified* *Julian* *Day* -# *Number*, which takes November 17, 1858 as its initial day. -# This is abbreviated as +mjd+ in the Date class. There -# is also an *Astronomical* *Modified* *Julian* *Day* *Number*, -# which is in UTC and includes fractional days. This is -# abbreviated as +amjd+ in the Date class. Like the Modified -# Julian Day Number (and unlike the Astronomical Julian -# Day Number), it counts from midnight. -# -# Alternative calendars such as the Ethiopic Solar Calendar, -# the Islamic Lunar Calendar, or the French Revolutionary Calendar -# are not supported by the Date class; nor are calendars that -# are based on an Era different from the Common Era, such as -# the Japanese Era. -# -# === Calendar Reform -# -# The standard civil year is 365 days long. However, the -# solar year is fractionally longer than this. To account -# for this, a *leap* *year* is occasionally inserted. This -# is a year with 366 days, the extra day falling on February 29. -# In the early days of the civil calendar, every fourth -# year without exception was a leap year. This way of -# reckoning leap years is the *Julian* *Calendar*. -# -# However, the solar year is marginally shorter than 365 1/4 -# days, and so the *Julian* *Calendar* gradually ran slow -# over the centuries. To correct this, every 100th year -# (but not every 400th year) was excluded as a leap year. -# This way of reckoning leap years, which we use today, is -# the *Gregorian* *Calendar*. -# -# The Gregorian Calendar was introduced at different times -# in different regions. The day on which it was introduced -# for a particular region is the *Day* *of* *Calendar* -# *Reform* for that region. This is abbreviated as +sg+ -# (for Start of Gregorian calendar) in the Date class. -# -# Two such days are of particular -# significance. The first is October 15, 1582, which was -# the Day of Calendar Reform for Italy and most Catholic -# countries. The second is September 14, 1752, which was -# the Day of Calendar Reform for England and its colonies -# (including what is now the United States). These two -# dates are available as the constants Date::ITALY and -# Date::ENGLAND, respectively. (By comparison, Germany and -# Holland, less Catholic than Italy but less stubborn than -# England, changed over in 1698; Sweden in 1753; Russia not -# till 1918, after the Revolution; and Greece in 1923. Many -# Orthodox churches still use the Julian Calendar. A complete -# list of Days of Calendar Reform can be found at -# http://www.polysyllabic.com/GregConv.html.) -# -# Switching from the Julian to the Gregorian calendar -# involved skipping a number of days to make up for the -# accumulated lag, and the later the switch was (or is) -# done, the more days need to be skipped. So in 1582 in Italy, -# 4th October was followed by 15th October, skipping 10 days; in 1752 -# in England, 2nd September was followed by 14th September, skipping -# 11 days; and if I decided to switch from Julian to Gregorian -# Calendar this midnight, I would go from 27th July 2003 (Julian) -# today to 10th August 2003 (Gregorian) tomorrow, skipping -# 13 days. The Date class is aware of this gap, and a supposed -# date that would fall in the middle of it is regarded as invalid. -# -# The Day of Calendar Reform is relevant to all date representations -# involving years. It is not relevant to the Julian Day Numbers, -# except for converting between them and year-based representations. -# -# In the Date and DateTime classes, the Day of Calendar Reform or -# +sg+ can be specified a number of ways. First, it can be as -# the Julian Day Number of the Day of Calendar Reform. Second, -# it can be using the constants Date::ITALY or Date::ENGLAND; these -# are in fact the Julian Day Numbers of the Day of Calendar Reform -# of the respective regions. Third, it can be as the constant -# Date::JULIAN, which means to always use the Julian Calendar. -# Finally, it can be as the constant Date::GREGORIAN, which means -# to always use the Gregorian Calendar. -# -# Note: in the Julian Calendar, New Years Day was March 25. The -# Date class does not follow this convention. -# -# === Offsets -# -# DateTime objects support a simple representation -# of offsets. Offsets are represented as an offset -# from UTC (UTC is not identical GMT; GMT is a historical term), -# as a fraction of a day. This offset is the -# how much local time is later (or earlier) than UTC. -# As you travel east, the offset increases until you -# reach the dateline in the middle of the Pacific Ocean; -# as you travel west, the offset decreases. This offset -# is abbreviated as +of+ in the Date class. -# -# This simple representation of offsets does not take -# into account the common practice of Daylight Savings -# Time or Summer Time. -# -# Most DateTime methods return the date and the -# time in local time. The two exceptions are -# #ajd() and #amjd(), which return the date and time -# in UTC time, including fractional days. -# -# The Date class does not support offsets, in that -# there is no way to create a Date object with non-utc offset. -# -# == Examples of use -# -# === Print out the date of every Sunday between two dates. -# -# def print_sundays(d1, d2) -# d1 += 1 until d1.sunday? -# d1.step(d2, 7) do |d| -# puts d.strftime('%B %-d') -# end -# end -# -# print_sundays(Date.new(2003, 4, 8), Date.new(2003, 5, 23)) +# date.rb: Written by Tadayoshi Funaba 1998-2011 +require 'date_core' require 'date/format' -# Class representing a date. -# -# See the documentation to the file date.rb for an overview. -# -# Internally, the date is represented as an Astronomical -# Julian Day Number, +ajd+. The Day of Calendar Reform, +sg+, is -# also stored, for conversions to other date formats. (There -# is also an +of+ field for a time zone offset, but this -# is only for the use of the DateTime subclass.) -# -# A new Date object is created using one of the object creation -# class methods named after the corresponding date format, and the -# arguments appropriate to that date format; for instance, -# Date::civil() (aliased to Date::new()) with year, month, -# and day-of-month, or Date::ordinal() with year and day-of-year. -# All of these object creation class methods also take the -# Day of Calendar Reform as an optional argument. -# -# Date objects are immutable once created. -# -# Once a Date has been created, date values -# can be retrieved for the different date formats supported -# using instance methods. For instance, #mon() gives the -# Civil month, #cwday() gives the Commercial day of the week, -# and #yday() gives the Ordinal day of the year. Date values -# can be retrieved in any format, regardless of what format -# was used to create the Date instance. -# -# The Date class includes the Comparable module, allowing -# date objects to be compared and sorted, ranges of dates -# to be created, and so forth. class Date - include Comparable - - # Full month names, in English. Months count from 1 to 12; a - # month's numerical representation indexed into this array - # gives the name of that month (hence the first element is nil). - MONTHNAMES = [nil] + %w(January February March April May June July - August September October November December) - - # Full names of days of the week, in English. Days of the week - # count from 0 to 6 (except in the commercial week); a day's numerical - # representation indexed into this array gives the name of that day. - DAYNAMES = %w(Sunday Monday Tuesday Wednesday Thursday Friday Saturday) - - # Abbreviated month names, in English. - ABBR_MONTHNAMES = [nil] + %w(Jan Feb Mar Apr May Jun - Jul Aug Sep Oct Nov Dec) - - # Abbreviated day names, in English. - ABBR_DAYNAMES = %w(Sun Mon Tue Wed Thu Fri Sat) - - [MONTHNAMES, DAYNAMES, ABBR_MONTHNAMES, ABBR_DAYNAMES].each do |xs| - xs.each{|x| x.freeze unless x.nil?}.freeze - end - - # now only for marshal dumped class Infinity < Numeric # :nodoc: include Comparable @@ -287,1361 +58,4 @@ class Date end - # The Julian Day Number of the Day of Calendar Reform for Italy - # and the Catholic countries. - ITALY = 2299161 # 1582-10-15 - - # The Julian Day Number of the Day of Calendar Reform for England - # and her Colonies. - ENGLAND = 2361222 # 1752-09-14 - - # A constant used to indicate that a Date should always use the - # Julian calendar. - JULIAN = Float::INFINITY - - # A constant used to indicate that a Date should always use the - # Gregorian calendar. - GREGORIAN = -Float::INFINITY - - HALF_DAYS_IN_DAY = Rational(1, 2) # :nodoc: - HOURS_IN_DAY = Rational(1, 24) # :nodoc: - MINUTES_IN_DAY = Rational(1, 1440) # :nodoc: - SECONDS_IN_DAY = Rational(1, 86400) # :nodoc: - MILLISECONDS_IN_DAY = Rational(1, 86400*10**3) # :nodoc: - NANOSECONDS_IN_DAY = Rational(1, 86400*10**9) # :nodoc: - MILLISECONDS_IN_SECOND = Rational(1, 10**3) # :nodoc: - NANOSECONDS_IN_SECOND = Rational(1, 10**9) # :nodoc: - - MJD_EPOCH_IN_AJD = Rational(4800001, 2) # 1858-11-17 # :nodoc: - UNIX_EPOCH_IN_AJD = Rational(4881175, 2) # 1970-01-01 # :nodoc: - MJD_EPOCH_IN_CJD = 2400001 # :nodoc: - UNIX_EPOCH_IN_CJD = 2440588 # :nodoc: - LD_EPOCH_IN_CJD = 2299160 # :nodoc: - - t = Module.new do - - private - - def find_fdoy(y, sg) # :nodoc: - j = nil - 1.upto(31) do |d| - break if j = _valid_civil_r?(y, 1, d, sg) - end - j - end - - def find_ldoy(y, sg) # :nodoc: - j = nil - 31.downto(1) do |d| - break if j = _valid_civil_r?(y, 12, d, sg) - end - j - end - - def find_fdom(y, m, sg) # :nodoc: - j = nil - 1.upto(31) do |d| - break if j = _valid_civil_r?(y, m, d, sg) - end - j - end - - def find_ldom(y, m, sg) # :nodoc: - j = nil - 31.downto(1) do |d| - break if j = _valid_civil_r?(y, m, d, sg) - end - j - end - - # Convert an Ordinal Date to a Julian Day Number. - # - # +y+ and +d+ are the year and day-of-year to convert. - # +sg+ specifies the Day of Calendar Reform. - # - # Returns the corresponding Julian Day Number. - def ordinal_to_jd(y, d, sg=GREGORIAN) # :nodoc: - find_fdoy(y, sg) + d - 1 - end - - # Convert a Julian Day Number to an Ordinal Date. - # - # +jd+ is the Julian Day Number to convert. - # +sg+ specifies the Day of Calendar Reform. - # - # Returns the corresponding Ordinal Date as - # [year, day_of_year] - def jd_to_ordinal(jd, sg=GREGORIAN) # :nodoc: - y = jd_to_civil(jd, sg)[0] - j = find_fdoy(y, sg) - doy = jd - j + 1 - return y, doy - end - - # Convert a Civil Date to a Julian Day Number. - # +y+, +m+, and +d+ are the year, month, and day of the - # month. +sg+ specifies the Day of Calendar Reform. - # - # Returns the corresponding Julian Day Number. - def civil_to_jd(y, m, d, sg=GREGORIAN) # :nodoc: - if m <= 2 - y -= 1 - m += 12 - end - a = (y / 100.0).floor - b = 2 - a + (a / 4.0).floor - jd = (365.25 * (y + 4716)).floor + - (30.6001 * (m + 1)).floor + - d + b - 1524 - if jd < sg - jd -= b - end - jd - end - - # Convert a Julian Day Number to a Civil Date. +jd+ is - # the Julian Day Number. +sg+ specifies the Day of - # Calendar Reform. - # - # Returns the corresponding [year, month, day_of_month] - # as a three-element array. - def jd_to_civil(jd, sg=GREGORIAN) # :nodoc: - if jd < sg - a = jd - else - x = ((jd - 1867216.25) / 36524.25).floor - a = jd + 1 + x - (x / 4.0).floor - end - b = a + 1524 - c = ((b - 122.1) / 365.25).floor - d = (365.25 * c).floor - e = ((b - d) / 30.6001).floor - dom = b - d - (30.6001 * e).floor - if e <= 13 - m = e - 1 - y = c - 4716 - else - m = e - 13 - y = c - 4715 - end - return y, m, dom - end - - # Convert a Commercial Date to a Julian Day Number. - # - # +y+, +w+, and +d+ are the (commercial) year, week of the year, - # and day of the week of the Commercial Date to convert. - # +sg+ specifies the Day of Calendar Reform. - def commercial_to_jd(y, w, d, sg=GREGORIAN) # :nodoc: - j = find_fdoy(y, sg) + 3 - (j - (((j - 1) + 1) % 7)) + - 7 * (w - 1) + - (d - 1) - end - - # Convert a Julian Day Number to a Commercial Date - # - # +jd+ is the Julian Day Number to convert. - # +sg+ specifies the Day of Calendar Reform. - # - # Returns the corresponding Commercial Date as - # [commercial_year, week_of_year, day_of_week] - def jd_to_commercial(jd, sg=GREGORIAN) # :nodoc: - a = jd_to_civil(jd - 3, sg)[0] - j = commercial_to_jd(a + 1, 1, 1, sg) - if jd >= j - y = a + 1 - else - j = commercial_to_jd(a, 1, 1, sg) - y = a - end - w = 1 + ((jd - j) / 7).floor - d = (jd + 1) % 7 - d = 7 if d == 0 - return y, w, d - end - - def weeknum_to_jd(y, w, d, f=0, sg=GREGORIAN) # :nodoc: - a = find_fdoy(y, sg) + 6 - (a - ((a - f) + 1) % 7 - 7) + 7 * w + d - end - - def jd_to_weeknum(jd, f=0, sg=GREGORIAN) # :nodoc: - y, _, d = jd_to_civil(jd, sg) - a = find_fdoy(y, sg) + 6 - w, d = (jd - (a - ((a - f) + 1) % 7) + 7).divmod(7) - return y, w, d - end - - def nth_kday_to_jd(y, m, n, k, sg=GREGORIAN) # :nodoc: - j = if n > 0 - find_fdom(y, m, sg) - 1 - else - find_ldom(y, m, sg) + 7 - end - (j - (((j - k) + 1) % 7)) + 7 * n - end - - def jd_to_nth_kday(jd, sg=GREGORIAN) # :nodoc: - y, m, = jd_to_civil(jd, sg) - j = find_fdom(y, m, sg) - return y, m, ((jd - j) / 7).floor + 1, jd_to_wday(jd) - end - - # Convert an Astronomical Julian Day Number to a (civil) Julian - # Day Number. - # - # +ajd+ is the Astronomical Julian Day Number to convert. - # +of+ is the offset from UTC as a fraction of a day (defaults to 0). - # - # Returns the (civil) Julian Day Number as [day_number, - # fraction] where +fraction+ is always 1/2. - def ajd_to_jd(ajd, of=0) (ajd + of + HALF_DAYS_IN_DAY).divmod(1) end # :nodoc: - - # Convert a (civil) Julian Day Number to an Astronomical Julian - # Day Number. - # - # +jd+ is the Julian Day Number to convert, and +fr+ is a - # fractional day. - # +of+ is the offset from UTC as a fraction of a day (defaults to 0). - # - # Returns the Astronomical Julian Day Number as a single - # numeric value. - def jd_to_ajd(jd, fr, of=0) jd + fr - of - HALF_DAYS_IN_DAY end # :nodoc: - - # Convert a fractional day +fr+ to [hours, minutes, seconds, - # fraction_of_a_second] - def day_fraction_to_time(fr) # :nodoc: - ss, fr = fr.divmod(SECONDS_IN_DAY) # 4p - h, ss = ss.divmod(3600) - min, s = ss.divmod(60) - return h, min, s, fr * 86400 - end - - def day_fraction_to_time_wo_sf(fr) # :nodoc: - ss = fr.div(SECONDS_IN_DAY) # 4p - h, ss = ss.divmod(3600) - min, s = ss.divmod(60) - return h, min, s - end - - # Convert an +h+ hour, +min+ minutes, +s+ seconds period - # to a fractional day. - begin - Rational(Rational(1, 2), 2) # a challenge - - def time_to_day_fraction(h, min, s) - Rational(h * 3600 + min * 60 + s, 86400) # 4p - end - rescue - def time_to_day_fraction(h, min, s) - if Integer === h && Integer === min && Integer === s - Rational(h * 3600 + min * 60 + s, 86400) # 4p - else - (h * 3600 + min * 60 + s).to_r/86400 # 4p - end - end - end - - # Convert an Astronomical Modified Julian Day Number to an - # Astronomical Julian Day Number. - def amjd_to_ajd(amjd) amjd + MJD_EPOCH_IN_AJD end # :nodoc: - - # Convert an Astronomical Julian Day Number to an - # Astronomical Modified Julian Day Number. - def ajd_to_amjd(ajd) ajd - MJD_EPOCH_IN_AJD end # :nodoc: - - # Convert a Modified Julian Day Number to a Julian - # Day Number. - def mjd_to_jd(mjd) mjd + MJD_EPOCH_IN_CJD end # :nodoc: - - # Convert a Julian Day Number to a Modified Julian Day - # Number. - def jd_to_mjd(jd) jd - MJD_EPOCH_IN_CJD end # :nodoc: - - # Convert a count of the number of days since the adoption - # of the Gregorian Calendar (in Italy) to a Julian Day Number. - def ld_to_jd(ld) ld + LD_EPOCH_IN_CJD end # :nodoc: - - # Convert a Julian Day Number to the number of days since - # the adoption of the Gregorian Calendar (in Italy). - def jd_to_ld(jd) jd - LD_EPOCH_IN_CJD end # :nodoc: - - # Convert a Julian Day Number to the day of the week. - # - # Sunday is day-of-week 0; Saturday is day-of-week 6. - def jd_to_wday(jd) (jd + 1) % 7 end # :nodoc: - - # Is +jd+ a valid Julian Day Number? - # - # If it is, returns it. In fact, any value is treated as a valid - # Julian Day Number. - def _valid_jd_r? (jd, sg=GREGORIAN) jd end # :nodoc: - - # Do the year +y+ and day-of-year +d+ make a valid Ordinal Date? - # Returns the corresponding Julian Day Number if they do, or - # nil if they don't. - # - # +d+ can be a negative number, in which case it counts backwards - # from the end of the year (-1 being the last day of the year). - # No year wraparound is performed, however, so valid values of - # +d+ are -365 .. -1, 1 .. 365 on a non-leap-year, - # -366 .. -1, 1 .. 366 on a leap year. - # A date falling in the period skipped in the Day of Calendar Reform - # adjustment is not valid. - # - # +sg+ specifies the Day of Calendar Reform. - def _valid_ordinal_r? (y, d, sg=GREGORIAN) # :nodoc: - if d < 0 - return unless j = find_ldoy(y, sg) - ny, nd = jd_to_ordinal(j + d + 1, sg) - return unless ny == y - d = nd - end - jd = ordinal_to_jd(y, d, sg) - return unless [y, d] == jd_to_ordinal(jd, sg) - jd - end - - # Do year +y+, month +m+, and day-of-month +d+ make a - # valid Civil Date? Returns the corresponding Julian - # Day Number if they do, nil if they don't. - # - # +m+ and +d+ can be negative, in which case they count - # backwards from the end of the year and the end of the - # month respectively. No wraparound is performed, however, - # and invalid values cause an ArgumentError to be raised. - # A date falling in the period skipped in the Day of Calendar - # Reform adjustment is not valid. - # - # +sg+ specifies the Day of Calendar Reform. - def _valid_civil_r? (y, m, d, sg=GREGORIAN) # :nodoc: - if m < 0 - m += 13 - end - if d < 0 - return unless j = find_ldom(y, m, sg) - ny, nm, nd = jd_to_civil(j + d + 1, sg) - return unless [ny, nm] == [y, m] - d = nd - end - jd = civil_to_jd(y, m, d, sg) - return unless [y, m, d] == jd_to_civil(jd, sg) - jd - end - - # Do year +y+, week-of-year +w+, and day-of-week +d+ make a - # valid Commercial Date? Returns the corresponding Julian - # Day Number if they do, nil if they don't. - # - # Monday is day-of-week 1; Sunday is day-of-week 7. - # - # +w+ and +d+ can be negative, in which case they count - # backwards from the end of the year and the end of the - # week respectively. No wraparound is performed, however, - # and invalid values cause an ArgumentError to be raised. - # A date falling in the period skipped in the Day of Calendar - # Reform adjustment is not valid. - # - # +sg+ specifies the Day of Calendar Reform. - def _valid_commercial_r? (y, w, d, sg=GREGORIAN) # :nodoc: - if d < 0 - d += 8 - end - if w < 0 - ny, nw, = - jd_to_commercial(commercial_to_jd(y + 1, 1, 1, sg) + w * 7, sg) - return unless ny == y - w = nw - end - jd = commercial_to_jd(y, w, d, sg) - return unless [y, w, d] == jd_to_commercial(jd, sg) - jd - end - - def _valid_weeknum_r? (y, w, d, f, sg=GREGORIAN) # :nodoc: - if d < 0 - d += 7 - end - if w < 0 - ny, nw, = - jd_to_weeknum(weeknum_to_jd(y + 1, 1, f, f, sg) + w * 7, f, sg) - return unless ny == y - w = nw - end - jd = weeknum_to_jd(y, w, d, f, sg) - return unless [y, w, d] == jd_to_weeknum(jd, f, sg) - jd - end - - def _valid_nth_kday_r? (y, m, n, k, sg=GREGORIAN) # :nodoc: - if k < 0 - k += 7 - end - if n < 0 - ny, nm = (y * 12 + m).divmod(12) - nm, = (nm + 1) .divmod(1) - ny, nm, nn, = - jd_to_nth_kday(nth_kday_to_jd(ny, nm, 1, k, sg) + n * 7, sg) - return unless [ny, nm] == [y, m] - n = nn - end - jd = nth_kday_to_jd(y, m, n, k, sg) - return unless [y, m, n, k] == jd_to_nth_kday(jd, sg) - jd - end - - # Do hour +h+, minute +min+, and second +s+ constitute a valid time? - # - # If they do, returns their value as a fraction of a day. If not, - # returns nil. - # - # The 24-hour clock is used. Negative values of +h+, +min+, and - # +sec+ are treating as counting backwards from the end of the - # next larger unit (e.g. a +min+ of -2 is treated as 58). No - # wraparound is performed. - def _valid_time_r? (h, min, s) # :nodoc: - h += 24 if h < 0 - min += 60 if min < 0 - s += 60 if s < 0 - return unless ((0...24) === h && - (0...60) === min && - (0...60) === s) || - (24 == h && - 0 == min && - 0 == s) - time_to_day_fraction(h, min, s) - end - - end - - extend t - include t - - # Is a year a leap year in the Julian calendar? - # - # All years divisible by 4 are leap years in the Julian calendar. - def self.julian_leap? (y) y % 4 == 0 end - - # Is a year a leap year in the Gregorian calendar? - # - # All years divisible by 4 are leap years in the Gregorian calendar, - # except for years divisible by 100 and not by 400. - def self.gregorian_leap? (y) y % 4 == 0 && y % 100 != 0 || y % 400 == 0 end - - class << self; alias_method :leap?, :gregorian_leap? end - - def self.new!(ajd=0, of=0, sg=ITALY) - jd, df = ajd_to_jd(ajd, 0) - if !(Fixnum === jd) || - jd < sg || df !=0 || of != 0 || - jd < -327 || jd > 366963925 - return new_r!(ajd, of, sg) - end - new_l!(jd, sg) - end - - def self.jd_r(jd=0, sg=ITALY) # :nodoc: - jd = _valid_jd_r?(jd, sg) - new_r!(jd_to_ajd(jd, 0, 0), 0, sg) - end - - private_class_method :jd_r - - def self.ordinal_r(y=-4712, d=1, sg=ITALY) # :nodoc: - unless jd = _valid_ordinal_r?(y, d, sg) - raise ArgumentError, 'invalid date' - end - new_r!(jd_to_ajd(jd, 0, 0), 0, sg) - end - - private_class_method :ordinal_r - - def self.civil_r(y=-4712, m=1, d=1, sg=ITALY) # :nodoc: - unless jd = _valid_civil_r?(y, m, d, sg) - raise ArgumentError, 'invalid date' - end - new_r!(jd_to_ajd(jd, 0, 0), 0, sg) - end - - private_class_method :civil_r - - def self.commercial_r(y=-4712, w=1, d=1, sg=ITALY) # :nodoc: - unless jd = _valid_commercial_r?(y, w, d, sg) - raise ArgumentError, 'invalid date' - end - new_r!(jd_to_ajd(jd, 0, 0), 0, sg) - end - - private_class_method :commercial_r - - def self.weeknum(y=-4712, w=0, d=1, f=0, sg=ITALY) - unless jd = _valid_weeknum_r?(y, w, d, f, sg) - raise ArgumentError, 'invalid date' - end - new!(jd_to_ajd(jd, 0, 0), 0, sg) - end - - private_class_method :weeknum - - def self.nth_kday(y=-4712, m=1, n=1, k=1, sg=ITALY) - unless jd = _valid_nth_kday_r?(y, m, n, k, sg) - raise ArgumentError, 'invalid date' - end - new!(jd_to_ajd(jd, 0, 0), 0, sg) - end - - private_class_method :nth_kday - - def self.rewrite_frags(elem) # :nodoc: - elem ||= {} - if seconds = elem[:seconds] - d, fr = seconds.divmod(86400) - h, fr = fr.divmod(3600) - min, fr = fr.divmod(60) - s, fr = fr.divmod(1) - elem[:jd] = UNIX_EPOCH_IN_CJD + d - elem[:hour] = h - elem[:min] = min - elem[:sec] = s - elem[:sec_fraction] = fr - elem.delete(:seconds) - elem.delete(:offset) - end - elem - end - - private_class_method :rewrite_frags - - def self.complete_frags(elem) # :nodoc: - i = 0 - g = [[:time, [:hour, :min, :sec]], - [nil, [:jd]], - [:ordinal, [:year, :yday, :hour, :min, :sec]], - [:civil, [:year, :mon, :mday, :hour, :min, :sec]], - [:commercial, [:cwyear, :cweek, :cwday, :hour, :min, :sec]], - [:wday, [:wday, :hour, :min, :sec]], - [:wnum0, [:year, :wnum0, :wday, :hour, :min, :sec]], - [:wnum1, [:year, :wnum1, :wday, :hour, :min, :sec]], - [nil, [:cwyear, :cweek, :wday, :hour, :min, :sec]], - [nil, [:year, :wnum0, :cwday, :hour, :min, :sec]], - [nil, [:year, :wnum1, :cwday, :hour, :min, :sec]]]. - collect{|k, a| e = elem.values_at(*a).compact; [k, a, e]}. - select{|k, a, e| e.size > 0}. - sort_by{|k, a, e| [e.size, i -= 1]}.last - - d = nil - - if g && g[0] && (g[1].size - g[2].size) != 0 - d ||= Date.today - - case g[0] - when :ordinal - elem[:year] ||= d.year - elem[:yday] ||= 1 - when :civil - g[1].each do |e| - break if elem[e] - elem[e] = d.__send__(e) - end - elem[:mon] ||= 1 - elem[:mday] ||= 1 - when :commercial - g[1].each do |e| - break if elem[e] - elem[e] = d.__send__(e) - end - elem[:cweek] ||= 1 - elem[:cwday] ||= 1 - when :wday - elem[:jd] ||= (d - d.wday + elem[:wday]).jd - when :wnum0 - g[1].each do |e| - break if elem[e] - elem[e] = d.__send__(e) - end - elem[:wnum0] ||= 0 - elem[:wday] ||= 0 - when :wnum1 - g[1].each do |e| - break if elem[e] - elem[e] = d.__send__(e) - end - elem[:wnum1] ||= 0 - elem[:wday] ||= 1 - end - end - - if g && g[0] == :time - if self <= DateTime - d ||= Date.today - elem[:jd] ||= d.jd - end - end - - elem[:hour] ||= 0 - elem[:min] ||= 0 - elem[:sec] ||= 0 - elem[:sec] = [elem[:sec], 59].min - - elem - end - - private_class_method :complete_frags - - def self.valid_date_frags?(elem, sg) # :nodoc: - catch :jd do - a = elem.values_at(:jd) - if a.all? - if jd = _valid_jd_r?(*(a << sg)) - throw :jd, jd - end - end - - a = elem.values_at(:year, :yday) - if a.all? - if jd = _valid_ordinal_r?(*(a << sg)) - throw :jd, jd - end - end - - a = elem.values_at(:year, :mon, :mday) - if a.all? - if jd = _valid_civil_r?(*(a << sg)) - throw :jd, jd - end - end - - a = elem.values_at(:cwyear, :cweek, :cwday) - if a[2].nil? && elem[:wday] - a[2] = elem[:wday].nonzero? || 7 - end - if a.all? - if jd = _valid_commercial_r?(*(a << sg)) - throw :jd, jd - end - end - - a = elem.values_at(:year, :wnum0, :wday) - if a[2].nil? && elem[:cwday] - a[2] = elem[:cwday] % 7 - end - if a.all? - if jd = _valid_weeknum_r?(*(a << 0 << sg)) - throw :jd, jd - end - end - - a = elem.values_at(:year, :wnum1, :wday) - if a[2] - a[2] = (a[2] - 1) % 7 - end - if a[2].nil? && elem[:cwday] - a[2] = (elem[:cwday] - 1) % 7 - end - if a.all? - if jd = _valid_weeknum_r?(*(a << 1 << sg)) - throw :jd, jd - end - end - end - end - - private_class_method :valid_date_frags? - - def self.valid_time_frags? (elem) # :nodoc: - h, min, s = elem.values_at(:hour, :min, :sec) - _valid_time_r?(h, min, s) - end - - private_class_method :valid_time_frags? - - def self.new_by_frags(elem, sg) # :nodoc: - elem = rewrite_frags(elem) - elem = complete_frags(elem) - unless jd = valid_date_frags?(elem, sg) - raise ArgumentError, 'invalid date' - end - new!(jd_to_ajd(jd, 0, 0), 0, sg) - end - - private_class_method :new_by_frags - - # Create a new Date object by parsing from a String - # according to a specified format. - # - # +str+ is a String holding a date representation. - # +fmt+ is the format that the date is in. See - # date/format.rb for details on supported formats. - # - # The default +str+ is '-4712-01-01', and the default - # +fmt+ is '%F', which means Year-Month-Day_of_Month. - # This gives Julian Day Number day 0. - # - # +sg+ specifies the Day of Calendar Reform. - # - # An ArgumentError will be raised if +str+ cannot be - # parsed. - def self.strptime(str='-4712-01-01', fmt='%F', sg=ITALY) - elem = _strptime(str, fmt) - new_by_frags(elem, sg) - end - - # Create a new Date object by parsing from a String, - # without specifying the format. - # - # +str+ is a String holding a date representation. - # +comp+ specifies whether to interpret 2-digit years - # as 19XX (>= 69) or 20XX (< 69); the default is to. - # The method will attempt to parse a date from the String - # using various heuristics; see #_parse in date/format.rb - # for more details. If parsing fails, an ArgumentError - # will be raised. - # - # The default +str+ is '-4712-01-01'; this is Julian - # Day Number day 0. - # - # +sg+ specifies the Day of Calendar Reform. - def self.parse(str='-4712-01-01', comp=true, sg=ITALY) - elem = _parse(str, comp) - new_by_frags(elem, sg) - end - - def self.iso8601(str='-4712-01-01', sg=ITALY) # :nodoc: - elem = _iso8601(str) - new_by_frags(elem, sg) - end - - def self.rfc3339(str='-4712-01-01T00:00:00+00:00', sg=ITALY) # :nodoc: - elem = _rfc3339(str) - new_by_frags(elem, sg) - end - - def self.xmlschema(str='-4712-01-01', sg=ITALY) # :nodoc: - elem = _xmlschema(str) - new_by_frags(elem, sg) - end - - def self.rfc2822(str='Mon, 1 Jan -4712 00:00:00 +0000', sg=ITALY) # :nodoc: - elem = _rfc2822(str) - new_by_frags(elem, sg) - end - - class << self; alias_method :rfc822, :rfc2822 end - - def self.httpdate(str='Mon, 01 Jan -4712 00:00:00 GMT', sg=ITALY) # :nodoc: - elem = _httpdate(str) - new_by_frags(elem, sg) - end - - def self.jisx0301(str='-4712-01-01', sg=ITALY) # :nodoc: - elem = _jisx0301(str) - new_by_frags(elem, sg) - end - - class << self - - def once(*ids) # :nodoc: -- restricted - for id in ids - module_eval <<-"end;" - alias_method :__#{id.object_id}__, :#{id.to_s} - private :__#{id.object_id}__ - def #{id.to_s}(*args) - __ca__[#{id.object_id}] ||= __#{id.object_id}__(*args) - end - end; - end - end # <<dummy - - private :once - - end - - def amjd_r() ajd_to_amjd(ajd) end - - once :amjd_r - - def daynum() ajd_to_jd(ajd, offset) end - - once :daynum - private :daynum - - def jd_r() daynum[0] end # :nodoc: - def day_fraction_r() daynum[1] end # :nodoc: - def mjd_r() jd_to_mjd(jd) end # :nodoc: - def ld_r() jd_to_ld(jd) end # :nodoc: - - once :jd_r, :day_fraction_r, :mjd_r, :ld_r - private :jd_r, :day_fraction_r, :mjd_r, :ld_r - - def civil() jd_to_civil(jd, start) end # :nodoc: - def ordinal() jd_to_ordinal(jd, start) end # :nodoc: - def commercial() jd_to_commercial(jd, start) end # :nodoc: - - def weeknum0() jd_to_weeknum(jd, 0, start) end # :nodoc: - def weeknum1() jd_to_weeknum(jd, 1, start) end # :nodoc: - - once :civil, :ordinal, :commercial, :weeknum0, :weeknum1 - private :civil, :ordinal, :commercial, :weeknum0, :weeknum1 - - def year_r() civil[0] end # :nodoc: - def yday_r() ordinal[1] end # :nodoc: - def mon_r() civil[1] end # :nodoc: - def mday_r() civil[2] end # :nodoc: - - private :year_r, :yday_r, :mon_r, :mday_r - - def wnum0_r() weeknum0[1] end # :nodoc: - def wnum1_r() weeknum1[1] end # :nodoc: - - private :wnum0_r, :wnum1_r - - def time() day_fraction_to_time(day_fraction) end # :nodoc: - def time_wo_sf() day_fraction_to_time_wo_sf(day_fraction) end # :nodoc: - def time_sf() day_fraction % SECONDS_IN_DAY * 86400 end # :nodoc: - - once :time, :time_wo_sf, :time_sf - private :time, :time_wo_sf, :time_sf - - def hour_r() time_wo_sf[0] end # :nodoc: # 4p - def min_r() time_wo_sf[1] end # :nodoc: # 4p - def sec_r() time_wo_sf[2] end # :nodoc: # 4p - def sec_fraction_r() time_sf end # 4p - - private :hour_r, :min_r, :sec_r, :sec_fraction_r - - def zone_r # :nodoc: # 4p - strftime('%:z') - sign = if offset < 0 then '-' else '+' end - fr = offset.abs - ss = fr.div(SECONDS_IN_DAY) - hh, ss = ss.divmod(3600) - mm = ss.div(60) - format('%s%02d:%02d', sign, hh, mm) - end - - private :zone_r - - def cwyear_r() commercial[0] end # :nodoc: - def cweek_r() commercial[1] end # :nodoc: - def cwday_r() commercial[2] end # :nodoc: - - private :cwyear_r, :cweek_r, :cwday_r - - def wday_r() jd_to_wday(jd) end # :nodoc: - - once :wday_r - private :wday_r - -=begin - MONTHNAMES.each_with_index do |n, i| - if n - define_method(n.downcase + '?'){mon == i} - end - end -=end - - DAYNAMES.each_with_index do |n, i| - define_method(n.downcase + '?'){wday == i} - end - - def nth_kday? (n, k) # :nodoc: - k == wday && jd === nth_kday_to_jd(year, mon, n, k, start) - end - - private :nth_kday? - - def julian_r? () jd < start end # :nodoc: - def gregorian_r? () !julian? end # :nodoc: - - once :julian_r?, :gregorian_r? - private :julian_r?, :gregorian_r? - - def fix_style # :nodoc: - if julian? - then self.class::JULIAN - else self.class::GREGORIAN end - end - - private :fix_style - - def leap_r? # :nodoc: - jd_to_civil(civil_to_jd(year, 3, 1, fix_style) - 1, - fix_style)[-1] == 29 - end - - once :leap_r? - private :leap_r? - - def new_start_r(sg=self.class::ITALY) self.class.new_r!(ajd, offset, sg) end # :nodoc: - - private :new_start_r - - # Create a copy of this Date object that uses the Italian/Catholic - # Day of Calendar Reform. - def italy() new_start(self.class::ITALY) end - - # Create a copy of this Date object that uses the English/Colonial - # Day of Calendar Reform. - def england() new_start(self.class::ENGLAND) end - - # Create a copy of this Date object that always uses the Julian - # Calendar. - def julian() new_start(self.class::JULIAN) end - - # Create a copy of this Date object that always uses the Gregorian - # Calendar. - def gregorian() new_start(self.class::GREGORIAN) end - - def new_offset_r(of=0) # :nodoc: - if String === of - of = Rational(zone_to_diff(of) || 0, 86400) - elsif Float === of - of = Rational((of * 86400).round, 86400) - end - self.class.new_r!(ajd, of, start) - end - - private :new_offset_r - - def plus_r (n) # :nodoc: - case n - when Numeric - if Float === n - n = Rational((n * 86400000000000).round, 86400000000000) - end - return self.class.new_r!(ajd + n, offset, start) - end - raise TypeError, 'expected numeric' - end - - private :plus_r - - def minus_r (x) # :nodoc: - case x - when Numeric - if Float === x - x = Rational((x * 86400000000000).round, 86400000000000) - end - return self.class.new_r!(ajd - x, offset, start) - when Date - return ajd - x.ajd - end - raise TypeError, 'expected numeric or date' - end - - private :minus_r - - def cmp_r (other) # :nodoc: - case other - when Numeric; return ajd <=> other - when Date; return ajd <=> other.ajd - else - begin - l, r = other.coerce(self) - return l <=> r - rescue NoMethodError - end - end - nil - end - - private :cmp_r - - def equal_r (other) # :nodoc: - case other - when Numeric; return jd == other - when Date; return jd == other.jd - else - begin - l, r = other.coerce(self) - return l === r - rescue NoMethodError - end - end - false - end - - private :equal_r - - def next_day(n=1) self + n end - def prev_day(n=1) self - n end - - # Return a new Date one day after this one. - def next() next_day end - - alias_method :succ, :next - - # Return a new Date object that is +n+ months later than - # the current one. - # - # If the day-of-the-month of the current Date is greater - # than the last day of the target month, the day-of-the-month - # of the returned Date will be the last day of the target month. - def >> (n) - y, m = (year * 12 + (mon - 1) + n).divmod(12) - m, = (m + 1) .divmod(1) - d = mday - until jd2 = _valid_civil_r?(y, m, d, start) - d -= 1 - raise ArgumentError, 'invalid date' unless d > 0 - end - self + (jd2 - jd) - end - - # Return a new Date object that is +n+ months earlier than - # the current one. - # - # If the day-of-the-month of the current Date is greater - # than the last day of the target month, the day-of-the-month - # of the returned Date will be the last day of the target month. - def << (n) self >> -n end - - def next_month(n=1) self >> n end - def prev_month(n=1) self << n end - - def next_year(n=1) self >> n * 12 end - def prev_year(n=1) self << n * 12 end - - require 'enumerator' - - # Step the current date forward +step+ days at a - # time (or backward, if +step+ is negative) until - # we reach +limit+ (inclusive), yielding the resultant - # date at each step. - def step(limit, step=1) # :yield: date -=begin - if step.zero? - raise ArgumentError, "step can't be 0" - end -=end - unless block_given? - return to_enum(:step, limit, step) - end - da = self - op = %w(- <= >=)[step <=> 0] - while da.__send__(op, limit) - yield da - da += step - end - self - end - - # Step forward one day at a time until we reach +max+ - # (inclusive), yielding each date as we go. - def upto(max, &block) # :yield: date - step(max, +1, &block) - end - - # Step backward one day at a time until we reach +min+ - # (inclusive), yielding each date as we go. - def downto(min, &block) # :yield: date - step(min, -1, &block) - end - - def eql_r? (other) Date === other && self == other end # :nodoc: - - private :eql_r? - - def hash_r() ajd.hash end # :nodoc: - - private :hash_r - - def inspect_r # :nodoc: - format('#<%s[R]: %s (%s,%s,%s)>', self.class, to_s_r, ajd, offset, start) - end - - private :inspect_r - - def to_s_r() format('%.4d-%02d-%02d', year, mon, mday) end # :nodoc: # 4p - - private :to_s_r - end - -# Class representing a date and time. -# -# See the documentation to the file date.rb for an overview. -# -# DateTime objects are immutable once created. -# -# == Other methods. -# -# The following methods are defined in Date, but declared private -# there. They are made public in DateTime. They are documented -# here. -# -# === hour() -# -# Get the hour-of-the-day of the time. This is given -# using the 24-hour clock, counting from midnight. The first -# hour after midnight is hour 0; the last hour of the day is -# hour 23. -# -# === min() -# -# Get the minute-of-the-hour of the time. -# -# === sec() -# -# Get the second-of-the-minute of the time. -# -# === sec_fraction() -# -# Get the fraction of a second of the time. This is returned as -# a +Rational+. -# -# === zone() -# -# Get the time zone as a String. This is representation of the -# time offset such as "+10:00". -# -# === offset() -# -# Get the time zone offset as a fraction of a day. This is returned -# as a +Rational+. -# -# === new_offset(of=0) -# -# Create a new DateTime object, identical to the current one, except -# with a new time zone offset of +of+. +of+ is the new offset from -# UTC as a fraction of a day. -# -class DateTime < Date - - def self.new!(ajd=0, of=0, sg=ITALY) - jd, df = ajd_to_jd(ajd, 0) - df, sf = (df * 86400).divmod(1) - sf, ssf = (sf * 1000000000).divmod(1) - odf, osf = (of * 86400).divmod(1) - if !(Fixnum === jd) || - jd < sg || ssf != 0 || osf != 0 || - jd < -327 || jd > 366963925 - return new_r!(ajd, of, sg) - end - new_l!(jd, df, sf, odf, sg) - end - - def self.jd_r(jd=0, h=0, min=0, s=0, of=0, sg=ITALY) # :nodoc: - unless (jd = _valid_jd_r?(jd, sg)) && - (fr = _valid_time_r?(h, min, s)) - raise ArgumentError, 'invalid date' - end - if String === of - of = Rational(zone_to_diff(of) || 0, 86400) - elsif Float === of - of = Rational((of * 86400).round, 86400) - end - new_r!(jd_to_ajd(jd, fr, of), of, sg) - end - - private_class_method :jd_r - - def self.ordinal_r(y=-4712, d=1, h=0, min=0, s=0, of=0, sg=ITALY) # :nodoc: - unless (jd = _valid_ordinal_r?(y, d, sg)) && - (fr = _valid_time_r?(h, min, s)) - raise ArgumentError, 'invalid date' - end - if String === of - of = Rational(zone_to_diff(of) || 0, 86400) - elsif Float === of - of = Rational((of * 86400).round, 86400) - end - new_r!(jd_to_ajd(jd, fr, of), of, sg) - end - - private_class_method :ordinal_r - - def self.civil_r(y=-4712, m=1, d=1, h=0, min=0, s=0, of=0, sg=ITALY) # :nodoc: - unless (jd = _valid_civil_r?(y, m, d, sg)) && - (fr = _valid_time_r?(h, min, s)) - raise ArgumentError, 'invalid date' - end - if String === of - of = Rational(zone_to_diff(of) || 0, 86400) - elsif Float === of - of = Rational((of * 86400).round, 86400) - end - new_r!(jd_to_ajd(jd, fr, of), of, sg) - end - - private_class_method :civil_r - - def self.commercial_r(y=-4712, w=1, d=1, h=0, min=0, s=0, of=0, sg=ITALY) # :nodoc: - unless (jd = _valid_commercial_r?(y, w, d, sg)) && - (fr = _valid_time_r?(h, min, s)) - raise ArgumentError, 'invalid date' - end - if String === of - of = Rational(zone_to_diff(of) || 0, 86400) - elsif Float === of - of = Rational((of * 86400).round, 86400) - end - new_r!(jd_to_ajd(jd, fr, of), of, sg) - end - - private_class_method :commercial_r - - def self.weeknum(y=-4712, w=0, d=1, f=0, h=0, min=0, s=0, of=0, sg=ITALY) # :nodoc: - unless (jd = _valid_weeknum_r?(y, w, d, f, sg)) && - (fr = _valid_time_r?(h, min, s)) - raise ArgumentError, 'invalid date' - end - if String === of - of = Rational(zone_to_diff(of) || 0, 86400) - elsif Float === of - of = Rational((of * 86400).round, 86400) - end - new!(jd_to_ajd(jd, fr, of), of, sg) - end - - private_class_method :weeknum - - def self.nth_kday(y=-4712, m=1, n=1, k=1, h=0, min=0, s=0, of=0, sg=ITALY) # :nodoc: - unless (jd = _valid_nth_kday_r?(y, m, n, k, sg)) && - (fr = _valid_time_r?(h, min, s)) - raise ArgumentError, 'invalid date' - end - if String === of - of = Rational(zone_to_diff(of) || 0, 86400) - elsif Float === of - of = Rational((of * 86400).round, 86400) - end - new!(jd_to_ajd(jd, fr, of), of, sg) - end - - private_class_method :nth_kday - - def self.new_by_frags(elem, sg) # :nodoc: - elem = rewrite_frags(elem) - elem = complete_frags(elem) - unless (jd = valid_date_frags?(elem, sg)) && - (fr = valid_time_frags?(elem)) - raise ArgumentError, 'invalid date' - end - fr += (elem[:sec_fraction] || 0) / 86400 - of = Rational(elem[:offset] || 0, 86400) - new!(jd_to_ajd(jd, fr, of), of, sg) - end - - private_class_method :new_by_frags - - # Create a new DateTime object by parsing from a String - # according to a specified format. - # - # +str+ is a String holding a date-time representation. - # +fmt+ is the format that the date-time is in. See - # date/format.rb for details on supported formats. - # - # The default +str+ is '-4712-01-01T00:00:00+00:00', and the default - # +fmt+ is '%FT%T%z'. This gives midnight on Julian Day Number day 0. - # - # +sg+ specifies the Day of Calendar Reform. - # - # An ArgumentError will be raised if +str+ cannot be - # parsed. - def self.strptime(str='-4712-01-01T00:00:00+00:00', fmt='%FT%T%z', sg=ITALY) - elem = _strptime(str, fmt) - new_by_frags(elem, sg) - end - - # Create a new DateTime object by parsing from a String, - # without specifying the format. - # - # +str+ is a String holding a date-time representation. - # +comp+ specifies whether to interpret 2-digit years - # as 19XX (>= 69) or 20XX (< 69); the default is to. - # The method will attempt to parse a date-time from the String - # using various heuristics; see #_parse in date/format.rb - # for more details. If parsing fails, an ArgumentError - # will be raised. - # - # The default +str+ is '-4712-01-01T00:00:00+00:00'; this is Julian - # Day Number day 0. - # - # +sg+ specifies the Day of Calendar Reform. - def self.parse(str='-4712-01-01T00:00:00+00:00', comp=true, sg=ITALY) - elem = _parse(str, comp) - new_by_frags(elem, sg) - end - - def self.iso8601(str='-4712-01-01T00:00:00+00:00', sg=ITALY) # :nodoc: - elem = _iso8601(str) - new_by_frags(elem, sg) - end - - def self.xmlschema(str='-4712-01-01T00:00:00+00:00', sg=ITALY) # :nodoc: - elem = _xmlschema(str) - new_by_frags(elem, sg) - end - - def self.rfc2822(str='Mon, 1 Jan -4712 00:00:00 +0000', sg=ITALY) # :nodoc: - elem = _rfc2822(str) - new_by_frags(elem, sg) - end - - class << self; alias_method :rfc822, :rfc2822 end - - def self.httpdate(str='Mon, 01 Jan -4712 00:00:00 GMT', sg=ITALY) # :nodoc: - elem = _httpdate(str) - new_by_frags(elem, sg) - end - - def self.jisx0301(str='-4712-01-01T00:00:00+00:00', sg=ITALY) # :nodoc: - elem = _jisx0301(str) - new_by_frags(elem, sg) - end - - def to_s_r # :nodoc: # 4p - format('%.4d-%02d-%02dT%02d:%02d:%02d%s', - year, mon, mday, hour, min, sec, zone) - end - - private :to_s_r - -end - -class Time - - def to_time() getlocal end - - def to_date - jd = Date.__send__(:civil_to_jd, year, mon, mday, Date::ITALY) - Date.new!(Date.__send__(:jd_to_ajd, jd, 0, 0), 0, Date::ITALY) - end - - def to_datetime - jd = DateTime.__send__(:civil_to_jd, year, mon, mday, DateTime::ITALY) - fr = DateTime.__send__(:time_to_day_fraction, hour, min, [sec, 59].min) + - Rational(subsec, 86400) - of = Rational(utc_offset, 86400) - DateTime.new!(DateTime.__send__(:jd_to_ajd, jd, fr, of), - of, DateTime::ITALY) - end - -end - -class Date - - def to_time() Time.local(year, mon, mday) end - def to_date() self end - def to_datetime() DateTime.new!(jd_to_ajd(jd, 0, 0), offset, start) end - -end - -class DateTime < Date - - def to_time - d = new_offset(0) - d.instance_eval do - Time.utc(year, mon, mday, hour, min, sec + - sec_fraction) - end. - getlocal - end - - def to_date() Date.new!(jd_to_ajd(jd, 0, 0), 0, start) end - def to_datetime() self end - -end - -require 'date_core' |