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Diffstat (limited to 'lib/date.rb')
| -rw-r--r-- | lib/date.rb | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/lib/date.rb b/lib/date.rb deleted file mode 100644 index c1a2be96f1..0000000000 --- a/lib/date.rb +++ /dev/null @@ -1,258 +0,0 @@ -# -# Date.rb - -# $Release Version: $ -# $Revision: 1.1.1.1.4.4 $ -# $Date: 1998/02/18 01:56:47 $ -# by Yasuo OHBA(SHL Japan Inc. Technology Dept.) -# -# -- -# -# September 1752 -# S M Tu W Th F S -# 1 2 14 15 16 -# 17 18 19 20 21 22 23 -# 24 25 26 27 28 29 30 -# - -class Date - include Comparable - - Weektag = [ - "Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday" - ] - - Monthtag = [ - "January","February","March","April", "May", "June","July", - "August", "September", "October", "November", "December" - ] - - Monthtab = { - "jan"=>1, "feb"=>2, "mar"=>3, "apr"=>4, "may"=>5, "jun"=>6, - "jul"=>7, "aug"=>8, "sep"=>9, "oct"=>10, "nov"=>11, "dec"=>12 - } - - def initialize(y = 1, m = 1, d = 1) - if y.kind_of?(String) - case y - when /(\d\d\d\d)-?(?:(\d\d)-?(\d\d)?)?/ - @year = $1.to_i - @month = if $2 then $2.to_i else 1 end - @day = if $3 then $3.to_i else 1 end - else - require 'parsedate' - @year, @month, @day = ParseDate.parsedate(y) - end - else - if m.kind_of?(String) - m = Monthtab[m.downcase] - if m.nil? - raise ArgumentError, "Wrong argument. (month)" - end - end - @year = y.to_i - @month = m.to_i - @day = d.to_i - end - _check_date - return self - end - - def year - return @year - end - - def month - return @month - end - - def day - return @day - end - - def period - return Date.period!(@year, @month, @day) - end - - def jd - return period + 1721423 - end - - def mjd - return jd - 2400000.5 - end - - def to_s - format("%.3s, %.3s %2d %4d", name_of_week, name_of_month, @day, @year) - end - - def inspect - to_s - end - - def day_of_week - return (period + 5) % 7 - end - - def name_of_week - return Weektag[self.day_of_week] - end - - def name_of_month - return Monthtag[@month-1] - end - - def +(o) - if o.kind_of?(Numeric) - d = Integer(self.period + o) - elsif o.kind_of?(Date) - d = self.period + o.period - else - raise TypeError, "Illegal type. (Integer or Date)" - end - if d <= 0 - raise ArgumentError, "argument out of range. (self > other)" - end - return Date.at(d) - end - - def -(o) - if o.kind_of?(Numeric) - d = Integer(self.period - o) - elsif o.kind_of?(Date) - return Integer(self.period - o.period) - else - raise TypeError, "Illegal type. (Integer or Date)" - end - if d <= 0 - raise ArgumentError, "argument out of range. (self > other)" - end - return Date.at(d) - end - - def <=>(o) - if o.kind_of?(Integer) - d = o - elsif o.kind_of?(Date) - d = o.period - else - raise TypeError, "Illegal type. (Integer or Date)" - end - return self.period <=> d - end - - def eql?(o) - self == o - end - - def hash - return @year ^ @month ^ @day - end - - def leapyear? - Date.leapyear(@year) != 1 - end - - def _check_date - if @year == nil or @month == nil or @day == nil - raise ArgumentError, "argument contains nil" - end - m = Date.daylist(@year) - if @month < 1 || @month > 12 - raise ArgumentError, "argument(month) out of range." - return nil - end - if @year == 1752 && @month == 9 - if @day >= 3 && @day <= 13 - raise ArgumentError, "argument(1752/09/3-13) out of range." - return nil - end - d = 30 - else - d = m[@month] - end - if @day < 1 || @day > d - raise ArgumentError, "argument(day) out of range." - return nil - end - return self - end - - private :_check_date -end - -def Date.at(d) - if d.kind_of? Time - return Date.new(d.year, d.mon, d.mday) - end - if d.kind_of? Date - return Date.at(d.period) - end - mm = 1 - yy = (d / 366.0).to_i - if yy != 0 - dd = d - (Date.period!(yy, 1, 1) - 1) - else - dd = d - yy = 1 - end - dl = Date.daylist(yy) - while dd > dl[mm] - if dd > dl[0] - dd -= dl[0] - yy += 1 - dl = Date.daylist(yy) - else - dd -= dl[mm] - mm += 1 - end - end - if yy == 1752 && mm == 9 && dd >= 3 && dd <= 19 - dd += (14 - 3) # 1752/09/03-19 -> 1752/09/14-30 - end - - return Date.new(yy, mm, dd) -end - -def Date.period!(y, m, d) - p = d - dl = Date.daylist(y) - for mm in 1..(m - 1) - p += dl[mm] - end - p += (y - 1) * 365 + ((y - 1) / 4.0).to_i - if y > 1752 - p -= ((y - 1) / 100.0).to_i - p += ((y - 1) / 400.0).to_i - p += 2 - elsif y == 1752 && m == 9 && d >= 14 && d <= 30 - p -= (14 - 3) - end - return p -end - -def Date.leapyear(yy) - return ((Date.jan1!(yy + 1) + 7 - Date.jan1!(yy)) % 7) -end - -def Date.daylist(yy) - case (Date.leapyear(yy)) - when 1 # non-leapyear - return [365, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] - when 2 # leapyear - return [366, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] - else # 1752 - return [355, 31, 29, 31, 30, 31, 30, 31, 31, 19, 31, 30, 31] - end -end - -def Date.jan1!(y) - d = 4 + y + (y + 3) / 4 - if y > 1800 - d -= (y - 1701) / 100 - d += (y - 1601) / 400 - end - if y > 1752 - d += 3 - end - return (d % 7) -end |