599 lines
14 KiB
Ruby
599 lines
14 KiB
Ruby
# format.rb: Written by Tadayoshi Funaba 1999-2005
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# $Id: format.rb,v 2.15 2005-02-06 13:28:48+09 tadf Exp $
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require 'rational'
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class Date
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MONTHS = {
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'january' => 1, 'february' => 2, 'march' => 3, 'april' => 4,
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'may' => 5, 'june' => 6, 'july' => 7, 'august' => 8,
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'september'=> 9, 'october' =>10, 'november' =>11, 'december' =>12
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}
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DAYS = {
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'sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday'=> 3,
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'thursday' => 4, 'friday' => 5, 'saturday' => 6
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}
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ABBR_MONTHS = {
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'jan' => 1, 'feb' => 2, 'mar' => 3, 'apr' => 4,
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'may' => 5, 'jun' => 6, 'jul' => 7, 'aug' => 8,
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'sep' => 9, 'oct' =>10, 'nov' =>11, 'dec' =>12
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}
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ABBR_DAYS = {
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'sun' => 0, 'mon' => 1, 'tue' => 2, 'wed' => 3,
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'thu' => 4, 'fri' => 5, 'sat' => 6
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}
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ZONES = {
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'ut' => 0*3600, 'gmt' => 0*3600, 'est' => -5*3600, 'edt' => -4*3600,
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'cst' => -6*3600, 'cdt' => -5*3600, 'mst' => -7*3600, 'mdt' => -6*3600,
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'pst' => -8*3600, 'pdt' => -7*3600,
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'a' => 1*3600, 'b' => 2*3600, 'c' => 3*3600, 'd' => 4*3600,
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'e' => 5*3600, 'f' => 6*3600, 'g' => 7*3600, 'h' => 8*3600,
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'i' => 9*3600, 'k' => 10*3600, 'l' => 11*3600, 'm' => 12*3600,
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'n' => -1*3600, 'o' => -2*3600, 'p' => -3*3600, 'q' => -4*3600,
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'r' => -5*3600, 's' => -6*3600, 't' => -7*3600, 'u' => -8*3600,
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'v' => -9*3600, 'w' =>-10*3600, 'x' =>-11*3600, 'y' =>-12*3600,
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'z' => 0*3600,
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'utc' => 0*3600, 'wet' => 0*3600, 'bst' => 1*3600, 'wat' => -1*3600,
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'at' => -2*3600, 'ast' => -4*3600, 'adt' => -3*3600, 'yst' => -9*3600,
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'ydt' => -8*3600, 'hst' =>-10*3600, 'hdt' => -9*3600, 'cat' =>-10*3600,
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'ahst'=>-10*3600, 'nt' =>-11*3600, 'idlw'=>-12*3600, 'cet' => 1*3600,
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'met' => 1*3600, 'mewt'=> 1*3600, 'mest'=> 2*3600, 'mesz'=> 2*3600,
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'swt' => 1*3600, 'sst' => 2*3600, 'fwt' => 1*3600, 'fst' => 2*3600,
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'eet' => 2*3600, 'bt' => 3*3600, 'zp4' => 4*3600, 'zp5' => 5*3600,
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'zp6' => 6*3600, 'wast'=> 7*3600, 'wadt'=> 8*3600, 'cct' => 8*3600,
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'jst' => 9*3600, 'east'=> 10*3600, 'eadt'=> 11*3600, 'gst' => 10*3600,
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'nzt' => 12*3600, 'nzst'=> 12*3600, 'nzdt'=> 13*3600, 'idle'=> 12*3600
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}
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def self.__strptime(str, fmt, elem)
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fmt.scan(/%[EO]?.|./o) do |c|
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cc = c.sub(/\A%[EO]?(.)\Z/o, '%\\1')
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case cc
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when /\A\s/o
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str.sub!(/\A[\s\v]+/o, '')
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when '%A', '%a'
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return unless str.sub!(/\A([a-z]+)\b/io, '')
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val = DAYS[$1.downcase] || ABBR_DAYS[$1.downcase]
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return unless val
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elem[:wday] = val
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when '%B', '%b', '%h'
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return unless str.sub!(/\A([a-z]+)\b/io, '')
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val = MONTHS[$1.downcase] || ABBR_MONTHS[$1.downcase]
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return unless val
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elem[:mon] = val
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when '%C'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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elem[:cent] = val
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when '%c'
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return unless __strptime(str, '%a %b %e %H:%M:%S %Y', elem)
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when '%D'
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return unless __strptime(str, '%m/%d/%y', elem)
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when '%d', '%e'
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return unless str.sub!(/\A ?(\d+)/o, '')
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val = $1.to_i
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return unless (1..31) === val
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elem[:mday] = val
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when '%F'
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return unless __strptime(str, '%Y-%m-%d', elem)
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when '%G'
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return unless str.sub!(/\A([-+]?\d+)/o, '')
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val = $1.to_i
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elem[:cwyear] = val
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when '%g'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (0..99) === val
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elem[:cwyear] = val
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elem[:cent] ||= if val >= 69 then 19 else 20 end
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when '%H', '%k'
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return unless str.sub!(/\A ?(\d+)/o, '')
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val = $1.to_i
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return unless (0..24) === val
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elem[:hour] = val
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when '%I', '%l'
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return unless str.sub!(/\A ?(\d+)/o, '')
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val = $1.to_i
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return unless (1..12) === val
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elem[:hour] = val
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when '%j'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (1..366) === val
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elem[:yday] = val
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when '%M'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (0..59) === val
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elem[:min] = val
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when '%m'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (1..12) === val
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elem[:mon] = val
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=begin
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when '%N'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i.to_r / (10**9)
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elem[:sec_fraction] = val
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=end
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when '%n'
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return unless __strptime(str, ' ', elem)
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when '%p', '%P'
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return unless str.sub!(/\A([ap])(?:m\b|\.m\.)/io, '')
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elem[:merid] = if $1.downcase == 'a' then 0 else 12 end
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when '%R'
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return unless __strptime(str, '%H:%M', elem)
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when '%r'
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return unless __strptime(str, '%I:%M:%S %p', elem)
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when '%S'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (0..60) === val
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elem[:sec] = val
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when '%s'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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elem[:seconds] = val
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when '%T'
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return unless __strptime(str, '%H:%M:%S', elem)
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when '%t'
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return unless __strptime(str, ' ', elem)
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when '%U', '%W'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (0..53) === val
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elem[if c == '%U' then :wnum0 else :wnum1 end] = val
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when '%u'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (1..7) === val
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elem[:cwday] = val
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when '%V'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (1..53) === val
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elem[:cweek] = val
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when '%v'
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return unless __strptime(str, '%e-%b-%Y', elem)
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when '%w'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (0..6) === val
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elem[:wday] = val
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when '%X'
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return unless __strptime(str, '%H:%M:%S', elem)
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when '%x'
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return unless __strptime(str, '%m/%d/%y', elem)
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when '%Y'
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return unless str.sub!(/\A([-+]?\d+)/o, '')
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val = $1.to_i
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elem[:year] = val
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when '%y'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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return unless (0..99) === val
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elem[:year] = val
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elem[:cent] ||= if val >= 69 then 19 else 20 end
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when '%Z', '%z'
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return unless str.sub!(/\A([-+:a-z0-9]+(?:\s+dst\b)?)/io, '')
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val = $1
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elem[:zone] = val
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offset = zone_to_diff(val)
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elem[:offset] = offset
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when '%%'
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return unless str.sub!(/\A%/o, '')
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when '%+'
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return unless __strptime(str, '%a %b %e %H:%M:%S %Z %Y', elem)
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=begin
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when '%.'
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i.to_r / (10**$1.size)
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elem[:sec_fraction] = val
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=end
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when '%1'
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if $VERBOSE
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warn("warning: %1 is deprecated; forget this")
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end
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return unless str.sub!(/\A(\d+)/o, '')
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val = $1.to_i
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elem[:jd] = val
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when '%2'
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if $VERBOSE
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warn("warning: %2 is deprecated; use '%Y-%j'")
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end
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return unless __strptime(str, '%Y-%j', elem)
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when '%3'
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if $VERBOSE
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warn("warning: %3 is deprecated; use '%F'")
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end
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return unless __strptime(str, '%F', elem)
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else
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return unless str.sub!(Regexp.new('\\A' + Regexp.quote(c)), '')
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end
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end
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if cent = elem.delete(:cent)
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if elem[:cwyear]
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elem[:cwyear] += cent * 100
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end
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if elem[:year]
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elem[:year] += cent * 100
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end
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end
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if merid = elem.delete(:merid)
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if elem[:hour]
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elem[:hour] %= 12
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elem[:hour] += merid
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end
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end
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str
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end
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private_class_method :__strptime
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def self._strptime(str, fmt='%F')
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elem = {}
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elem if __strptime(str.dup, fmt, elem)
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end
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PARSE_MONTHPAT = ABBR_MONTHS.keys.join('|')
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PARSE_DAYPAT = ABBR_DAYS. keys.join('|')
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def self._parse(str, comp=false)
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str = str.dup
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str.gsub!(/[^-+,.\/:0-9a-z]+/ino, ' ')
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# day
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if str.sub!(/(#{PARSE_DAYPAT})\S*/ino, ' ')
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wday = ABBR_DAYS[$1.downcase]
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end
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# time
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if str.sub!(
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/(\d+):(\d+)
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(?:
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:(\d+)(?:[,.](\d*))?
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)?
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(?:
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\s*
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([ap])(?:m\b|\.m\.)
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)?
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(?:
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\s*
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(
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[a-z]+(?:\s+dst)?\b
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[-+]\d+(?::?\d+)
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)
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)?
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/inox,
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' ')
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hour = $1.to_i
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min = $2.to_i
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sec = $3.to_i if $3
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if $4
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sec_fraction = $4.to_i.to_r / (10**$4.size)
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end
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if $5
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hour %= 12
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if $5.downcase == 'p'
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hour += 12
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end
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end
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if $6
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zone = $6
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end
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end
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# eu
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if str.sub!(
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/(\d+)\S*
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\s+
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(#{PARSE_MONTHPAT})\S*
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(?:
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\s+
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(-?\d+)
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)?
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/inox,
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' ')
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mday = $1.to_i
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mon = ABBR_MONTHS[$2.downcase]
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if $3
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year = $3.to_i
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if $3.size > 2
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comp = false
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end
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end
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# us
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elsif str.sub!(
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/(#{PARSE_MONTHPAT})\S*
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\s+
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(\d+)\S*
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(?:
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\s+
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(-?\d+)
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)?
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/inox,
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' ')
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mon = ABBR_MONTHS[$1.downcase]
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mday = $2.to_i
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if $3
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year = $3.to_i
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if $3.size > 2
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comp = false
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end
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end
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# iso
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elsif str.sub!(/([-+]?\d+)-(\d+)-(-?\d+)/no, ' ')
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year = $1.to_i
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mon = $2.to_i
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mday = $3.to_i
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if $1.size > 2
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comp = false
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elsif $3.size > 2
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comp = false
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mday, mon, year = year, mon, mday
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end
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# jis
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elsif str.sub!(/([MTSH])(\d+)\.(\d+)\.(\d+)/ino, ' ')
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e = { 'm'=>1867,
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't'=>1911,
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's'=>1925,
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'h'=>1988
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}[$1.downcase]
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year = $2.to_i + e
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mon = $3.to_i
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mday = $4.to_i
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# vms
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elsif str.sub!(/(-?\d+)-(#{PARSE_MONTHPAT})[^-]*-(-?\d+)/ino, ' ')
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mday = $1.to_i
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mon = ABBR_MONTHS[$2.downcase]
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year = $3.to_i
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if $1.size > 2
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comp = false
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year, mon, mday = mday, mon, year
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elsif $3.size > 2
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comp = false
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end
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# sla
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elsif str.sub!(%r|(-?\d+)/(\d+)(?:/(-?\d+))?|no, ' ')
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mon = $1.to_i
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mday = $2.to_i
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if $3
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year = $3.to_i
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if $3.size > 2
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comp = false
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end
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end
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if $3 && $1.size > 2
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comp = false
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year, mon, mday = mon, mday, year
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end
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# ddd
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elsif str.sub!(
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/([-+]?)(\d{4,14})
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(?:
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\s*
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T?
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\s*
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(\d{2,6})(?:[,.](\d*))?
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)?
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(?:
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\s*
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(
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Z
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[-+]\d{2,4}
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)
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\b
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)?
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/inox,
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' ')
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case $2.size
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when 4
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mon = $2[ 0, 2].to_i
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mday = $2[ 2, 2].to_i
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when 6
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year = ($1 + $2[ 0, 2]).to_i
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mon = $2[ 2, 2].to_i
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mday = $2[ 4, 2].to_i
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when 8, 10, 12, 14
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year = ($1 + $2[ 0, 4]).to_i
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mon = $2[ 4, 2].to_i
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mday = $2[ 6, 2].to_i
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hour = $2[ 8, 2].to_i if $2.size >= 10
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min = $2[10, 2].to_i if $2.size >= 12
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sec = $2[12, 2].to_i if $2.size >= 14
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comp = false
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end
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if $3
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case $3.size
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when 2, 4, 6
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hour = $3[ 0, 2].to_i
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min = $3[ 2, 2].to_i if $3.size >= 4
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sec = $3[ 4, 2].to_i if $3.size >= 6
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end
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end
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if $4
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sec_fraction = $4.to_i.to_r / (10**$4.size)
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end
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if $5
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zone = $5
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end
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end
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if str.sub!(/\b(bc\b|bce\b|b\.c\.|b\.c\.e\.)/ino, ' ')
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if year
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year = -year + 1
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end
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end
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if comp and year
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if year >= 0 and year <= 99
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if year >= 69
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year += 1900
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else
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year += 2000
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end
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end
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end
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elem = {}
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elem[:year] = year if year
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elem[:mon] = mon if mon
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elem[:mday] = mday if mday
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elem[:hour] = hour if hour
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elem[:min] = min if min
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elem[:sec] = sec if sec
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elem[:sec_fraction] = sec_fraction if sec_fraction
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elem[:zone] = zone if zone
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offset = zone_to_diff(zone) if zone
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elem[:offset] = offset if offset
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elem[:wday] = wday if wday
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elem
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end
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def self.zone_to_diff(str)
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abb, dst = str.downcase.split(/\s+/o, 2)
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if ZONES.include?(abb)
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offset = ZONES[abb]
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offset += 3600 if dst
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elsif /\A([-+])(\d{2}):?(\d{2})?\Z/no =~ str
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offset = $2.to_i * 3600 + $3.to_i * 60
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offset *= -1 if $1 == '-'
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end
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offset
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end
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def strftime(fmt='%F')
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o = ''
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fmt.scan(/%[EO]?.|./o) do |c|
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cc = c.sub(/^%[EO]?(.)$/o, '%\\1')
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case cc
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when '%A'; o << DAYNAMES[wday]
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when '%a'; o << ABBR_DAYNAMES[wday]
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when '%B'; o << MONTHNAMES[mon]
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when '%b'; o << ABBR_MONTHNAMES[mon]
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when '%C'; o << '%02d' % (year / 100.0).floor # P2,ID
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when '%c'; o << strftime('%a %b %e %H:%M:%S %Y')
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when '%D'; o << strftime('%m/%d/%y') # P2,ID
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when '%d'; o << '%02d' % mday
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when '%e'; o << '%2d' % mday
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when '%F'; o << strftime('%Y-%m-%d') # ID
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when '%G'; o << '%.4d' % cwyear # ID
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when '%g'; o << '%02d' % (cwyear % 100) # ID
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when '%H'; o << '%02d' % hour
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when '%h'; o << strftime('%b') # P2,ID
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when '%I'; o << '%02d' % ((hour % 12).nonzero? or 12)
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when '%j'; o << '%03d' % yday
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when '%k'; o << '%2d' % hour # AR,TZ,GL
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when '%l'; o << '%2d' % ((hour % 12).nonzero? or 12) # AR,TZ,GL
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when '%M'; o << '%02d' % min
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when '%m'; o << '%02d' % mon
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=begin
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when '%N' # GNU date
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o << '%09d' % (sec_fraction / (1.to_r/86400/(10**9)))
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=end
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when '%n'; o << "\n" # P2,ID
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when '%P'; o << if hour < 12 then 'am' else 'pm' end # GL
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when '%p'; o << if hour < 12 then 'AM' else 'PM' end
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when '%R'; o << strftime('%H:%M') # ID
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when '%r'; o << strftime('%I:%M:%S %p') # P2,ID
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when '%S'; o << '%02d' % sec
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when '%s' # TZ,GL
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d = ajd - self.class.jd_to_ajd(self.class.civil_to_jd(1970,1,1), 0)
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s = (d * 86400).to_i
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o << '%d' % s
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when '%T'; o << strftime('%H:%M:%S') # P2,ID
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when '%t'; o << "\t" # P2,ID
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when '%U', '%W'
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a = self.class.civil_to_jd(year, 1, 1, ns?) + 6
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k = if c == '%U' then 0 else 1 end
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w = (jd - (a - ((a - k) + 1) % 7) + 7) / 7
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o << '%02d' % w
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when '%u'; o << '%d' % cwday # P2,ID
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when '%V'; o << '%02d' % cweek # P2,ID
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when '%v'; o << strftime('%e-%b-%Y') # AR,TZ
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when '%w'; o << '%d' % wday
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when '%X'; o << strftime('%H:%M:%S')
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when '%x'; o << strftime('%m/%d/%y')
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when '%Y'; o << '%.4d' % year
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when '%y'; o << '%02d' % (year % 100)
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when '%Z'; o << (if offset.zero? then 'Z' else strftime('%z') end)
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when '%z' # ID
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o << if offset < 0 then '-' else '+' end
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of = offset.abs
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hh, fr = of.divmod(1.to_r/24)
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mm = fr / (1.to_r/1440)
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o << '%02d' % hh
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o << '%02d' % mm
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when '%%'; o << '%'
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when '%+'; o << strftime('%a %b %e %H:%M:%S %Z %Y') # TZ
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=begin
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when '%.'
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o << '%06d' % (sec_fraction / (1.to_r/86400/(10**6)))
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=end
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when '%1'
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if $VERBOSE
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warn("warning: %1 is deprecated; forget this")
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end
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o << '%d' % jd
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when '%2'
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if $VERBOSE
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warn("warning: %2 is deprecated; use '%Y-%j'")
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end
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o << strftime('%Y-%j')
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when '%3'
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if $VERBOSE
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warn("warning: %3 is deprecated; use '%F'")
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end
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o << strftime('%F')
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else; o << c
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end
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end
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o
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end
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# alias_method :format, :strftime
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def asctime() strftime('%c') end
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alias_method :ctime, :asctime
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end
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class DateTime < Date
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def self._strptime(str, fmt='%FT%T%Z')
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super(str, fmt)
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end
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def strftime(fmt='%FT%T%Z')
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super(fmt)
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end
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end
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