# format.rb: Written by Tadayoshi Funaba 1999-2004
# $Id: format.rb,v 2.14 2004-11-06 10:58:40+09 tadf Exp $
require 'rational'
class Date
MONTHS = {
'january' => 1, 'february' => 2, 'march' => 3, 'april' => 4,
'may' => 5, 'june' => 6, 'july' => 7, 'august' => 8,
'september'=> 9, 'october' =>10, 'november' =>11, 'december' =>12
}
DAYS = {
'sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday'=> 3,
'thursday' => 4, 'friday' => 5, 'saturday' => 6
}
ABBR_MONTHS = {
'jan' => 1, 'feb' => 2, 'mar' => 3, 'apr' => 4,
'may' => 5, 'jun' => 6, 'jul' => 7, 'aug' => 8,
'sep' => 9, 'oct' =>10, 'nov' =>11, 'dec' =>12
}
ABBR_DAYS = {
'sun' => 0, 'mon' => 1, 'tue' => 2, 'wed' => 3,
'thu' => 4, 'fri' => 5, 'sat' => 6
}
ZONES = {
'ut' => 0*3600, 'gmt' => 0*3600, 'est' => -5*3600, 'edt' => -4*3600,
'cst' => -6*3600, 'cdt' => -5*3600, 'mst' => -7*3600, 'mdt' => -6*3600,
'pst' => -8*3600, 'pdt' => -7*3600,
'a' => 1*3600, 'b' => 2*3600, 'c' => 3*3600, 'd' => 4*3600,
'e' => 5*3600, 'f' => 6*3600, 'g' => 7*3600, 'h' => 8*3600,
'i' => 9*3600, 'k' => 10*3600, 'l' => 11*3600, 'm' => 12*3600,
'n' => -1*3600, 'o' => -2*3600, 'p' => -3*3600, 'q' => -4*3600,
'r' => -5*3600, 's' => -6*3600, 't' => -7*3600, 'u' => -8*3600,
'v' => -9*3600, 'w' =>-10*3600, 'x' =>-11*3600, 'y' =>-12*3600,
'z' => 0*3600,
'utc' => 0*3600, 'wet' => 0*3600, 'bst' => 1*3600, 'wat' => -1*3600,
'at' => -2*3600, 'ast' => -4*3600, 'adt' => -3*3600, 'yst' => -9*3600,
'ydt' => -8*3600, 'hst' =>-10*3600, 'hdt' => -9*3600, 'cat' =>-10*3600,
'ahst'=>-10*3600, 'nt' =>-11*3600, 'idlw'=>-12*3600, 'cet' => 1*3600,
'met' => 1*3600, 'mewt'=> 1*3600, 'mest'=> 2*3600, 'mesz'=> 2*3600,
'swt' => 1*3600, 'sst' => 2*3600, 'fwt' => 1*3600, 'fst' => 2*3600,
'eet' => 2*3600, 'bt' => 3*3600, 'zp4' => 4*3600, 'zp5' => 5*3600,
'zp6' => 6*3600, 'wast'=> 7*3600, 'wadt'=> 8*3600, 'cct' => 8*3600,
'jst' => 9*3600, 'east'=> 10*3600, 'eadt'=> 11*3600, 'gst' => 10*3600,
'nzt' => 12*3600, 'nzst'=> 12*3600, 'nzdt'=> 13*3600, 'idle'=> 12*3600
}
def self.__strptime(str, fmt, elem)
fmt.scan(/%[EO]?.|./o) do |c|
cc = c.sub(/\A%[EO]?(.)\Z/o, '%\\1')
case cc
when /\A\s/o
str.sub!(/\A[\s\v]+/o, '')
when '%A', '%a'
return unless str.sub!(/\A([a-z]+)\b/io, '')
val = DAYS[$1.downcase] || ABBR_DAYS[$1.downcase]
return unless val
elem[:wday] = val
when '%B', '%b', '%h'
return unless str.sub!(/\A([a-z]+)\b/io, '')
val = MONTHS[$1.downcase] || ABBR_MONTHS[$1.downcase]
return unless val
elem[:mon] = val
when '%C'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
elem[:cent] = val
when '%c'
return unless __strptime(str, '%a %b %e %H:%M:%S %Y', elem)
when '%D'
return unless __strptime(str, '%m/%d/%y', elem)
when '%d', '%e'
return unless str.sub!(/\A ?(\d+)/o, '')
val = $1.to_i
return unless (1..31) === val
elem[:mday] = val
when '%F'
return unless __strptime(str, '%Y-%m-%d', elem)
when '%G'
return unless str.sub!(/\A([-+]?\d+)/o, '')
val = $1.to_i
elem[:cwyear] = val
when '%g'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (0..99) === val
elem[:cwyear] = val
elem[:cent] ||= if val >= 69 then 19 else 20 end
when '%H', '%k'
return unless str.sub!(/\A ?(\d+)/o, '')
val = $1.to_i
return unless (0..24) === val
elem[:hour] = val
when '%I', '%l'
return unless str.sub!(/\A ?(\d+)/o, '')
val = $1.to_i
return unless (1..12) === val
elem[:hour] = val
when '%j'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (1..366) === val
elem[:yday] = val
when '%M'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (0..59) === val
elem[:min] = val
when '%m'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (1..12) === val
elem[:mon] = val
when '%n'
return unless __strptime(str, ' ', elem)
when '%p', '%P'
return unless str.sub!(/\A([ap])(?:m\b|\.m\.)/io, '')
elem[:merid] = if $1.downcase == 'a' then 0 else 12 end
when '%R'
return unless __strptime(str, '%H:%M', elem)
when '%r'
return unless __strptime(str, '%I:%M:%S %p', elem)
when '%S'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (0..60) === val
elem[:sec] = val
when '%s'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
elem[:seconds] = val
when '%T'
return unless __strptime(str, '%H:%M:%S', elem)
when '%t'
return unless __strptime(str, ' ', elem)
when '%U', '%W'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (0..53) === val
elem[if c == '%U' then :wnum0 else :wnum1 end] = val
when '%u'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (1..7) === val
elem[:cwday] = val
when '%V'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (1..53) === val
elem[:cweek] = val
when '%v'
return unless __strptime(str, '%e-%b-%Y', elem)
when '%w'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (0..6) === val
elem[:wday] = val
when '%X'
return unless __strptime(str, '%H:%M:%S', elem)
when '%x'
return unless __strptime(str, '%m/%d/%y', elem)
when '%Y'
return unless str.sub!(/\A([-+]?\d+)/o, '')
val = $1.to_i
elem[:year] = val
when '%y'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
return unless (0..99) === val
elem[:year] = val
elem[:cent] ||= if val >= 69 then 19 else 20 end
when '%Z', '%z'
return unless str.sub!(/\A([-+:a-z0-9]+(?:\s+dst\b)?)/io, '')
val = $1
elem[:zone] = val
offset = zone_to_diff(val)
elem[:offset] = offset
when '%%'
return unless str.sub!(/\A%/o, '')
when '%+'
return unless __strptime(str, '%a %b %e %H:%M:%S %Z %Y', elem)
=begin
when '%.'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i.to_r / (10**$1.size)
elem[:sec_fraction] = val
=end
when '%1'
return unless str.sub!(/\A(\d+)/o, '')
val = $1.to_i
elem[:jd] = val
when '%2'
return unless __strptime(str, '%Y-%j', elem)
when '%3'
return unless __strptime(str, '%F', elem)
else
return unless str.sub!(Regexp.new('\\A' + Regexp.quote(c)), '')
end
end
if cent = elem.delete(:cent)
if elem[:cwyear]
elem[:cwyear] += cent * 100
end
if elem[:year]
elem[:year] += cent * 100
end
end
if merid = elem.delete(:merid)
if elem[:hour]
elem[:hour] %= 12
elem[:hour] += merid
end
end
str
end
private_class_method :__strptime
def self._strptime(str, fmt='%F')
elem = {}
elem if __strptime(str.dup, fmt, elem)
end
PARSE_MONTHPAT = ABBR_MONTHS.keys.join('|')
PARSE_DAYPAT = ABBR_DAYS. keys.join('|')
def self._parse(str, comp=false)
str = str.dup
str.gsub!(/[^-+,.\/:0-9a-z]+/ino, ' ')
# day
if str.sub!(/(#{PARSE_DAYPAT})\S*/ino, ' ')
wday = ABBR_DAYS[$1.downcase]
end
# time
if str.sub!(
/(\d+):(\d+)
(?:
:(\d+)(?:[,.](\d*))?
)?
(?:
\s*
([ap])(?:m\b|\.m\.)
)?
(?:
\s*
(
[a-z]+(?:\s+dst)?\b
|
[-+]\d+(?::?\d+)
)
)?
/inox,
' ')
hour = $1.to_i
min = $2.to_i
sec = $3.to_i if $3
if $4
sec_fraction = $4.to_i.to_r / (10**$4.size)
end
if $5
hour %= 12
if $5.downcase == 'p'
hour += 12
end
end
if $6
zone = $6
end
end
# eu
if str.sub!(
/(\d+)\S*
\s+
(#{PARSE_MONTHPAT})\S*
(?:
\s+
(-?\d+)
)?
/inox,
' ')
mday = $1.to_i
mon = ABBR_MONTHS[$2.downcase]
if $3
year = $3.to_i
if $3.size > 2
comp = false
end
end
# us
elsif str.sub!(
/(#{PARSE_MONTHPAT})\S*
\s+
(\d+)\S*
(?:
\s+
(-?\d+)
)?
/inox,
' ')
mon = ABBR_MONTHS[$1.downcase]
mday = $2.to_i
if $3
year = $3.to_i
if $3.size > 2
comp = false
end
end
# iso
elsif str.sub!(/([-+]?\d+)-(\d+)-(-?\d+)/no, ' ')
year = $1.to_i
mon = $2.to_i
mday = $3.to_i
if $1.size > 2
comp = false
elsif $3.size > 2
comp = false
mday, mon, year = year, mon, mday
end
# jis
elsif str.sub!(/([MTSH])(\d+)\.(\d+)\.(\d+)/ino, ' ')
e = { 'm'=>1867,
't'=>1911,
's'=>1925,
'h'=>1988
}[$1.downcase]
year = $2.to_i + e
mon = $3.to_i
mday = $4.to_i
# vms
elsif str.sub!(/(-?\d+)-(#{PARSE_MONTHPAT})[^-]*-(-?\d+)/ino, ' ')
mday = $1.to_i
mon = ABBR_MONTHS[$2.downcase]
year = $3.to_i
if $1.size > 2
comp = false
year, mon, mday = mday, mon, year
elsif $3.size > 2
comp = false
end
# sla
elsif str.sub!(%r|(-?\d+)/(\d+)(?:/(-?\d+))?|no, ' ')
mon = $1.to_i
mday = $2.to_i
if $3
year = $3.to_i
if $3.size > 2
comp = false
end
end
if $3 && $1.size > 2
comp = false
year, mon, mday = mon, mday, year
end
# ddd
elsif str.sub!(
/([-+]?)(\d{4,14})
(?:
\s*
T?
\s*
(\d{2,6})(?:[,.](\d*))?
)?
(?:
\s*
(
Z
|
[-+]\d{2,4}
)
\b
)?
/inox,
' ')
case $2.size
when 4
mon = $2[ 0, 2].to_i
mday = $2[ 2, 2].to_i
when 6
year = ($1 + $2[ 0, 2]).to_i
mon = $2[ 2, 2].to_i
mday = $2[ 4, 2].to_i
when 8, 10, 12, 14
year = ($1 + $2[ 0, 4]).to_i
mon = $2[ 4, 2].to_i
mday = $2[ 6, 2].to_i
hour = $2[ 8, 2].to_i if $2.size >= 10
min = $2[10, 2].to_i if $2.size >= 12
sec = $2[12, 2].to_i if $2.size >= 14
comp = false
end
if $3
case $3.size
when 2, 4, 6
hour = $3[ 0, 2].to_i
min = $3[ 2, 2].to_i if $3.size >= 4
sec = $3[ 4, 2].to_i if $3.size >= 6
end
end
if $4
sec_fraction = $4.to_i.to_r / (10**$4.size)
end
if $5
zone = $5
end
end
if str.sub!(/\b(bc\b|bce\b|b\.c\.|b\.c\.e\.)/ino, ' ')
if year
year = -year + 1
end
end
if comp and year
if year >= 0 and year <= 99
if year >= 69
year += 1900
else
year += 2000
end
end
end
elem = {}
elem[:year] = year if year
elem[:mon] = mon if mon
elem[:mday] = mday if mday
elem[:hour] = hour if hour
elem[:min] = min if min
elem[:sec] = sec if sec
elem[:sec_fraction] = sec_fraction if sec_fraction
elem[:zone] = zone if zone
offset = zone_to_diff(zone) if zone
elem[:offset] = offset if offset
elem[:wday] = wday if wday
elem
end
def self.zone_to_diff(str)
abb, dst = str.downcase.split(/\s+/o, 2)
if ZONES.include?(abb)
offset = ZONES[abb]
offset += 3600 if dst
elsif /\A([-+])(\d{2}):?(\d{2})?\Z/no =~ str
offset = $2.to_i * 3600 + $3.to_i * 60
offset *= -1 if $1 == '-'
end
offset
end
def strftime(fmt='%F')
o = ''
fmt.scan(/%[EO]?.|./o) do |c|
cc = c.sub(/^%[EO]?(.)$/o, '%\\1')
case cc
when '%A'; o << DAYNAMES[wday]
when '%a'; o << ABBR_DAYNAMES[wday]
when '%B'; o << MONTHNAMES[mon]
when '%b'; o << ABBR_MONTHNAMES[mon]
when '%C'; o << '%02d' % (year / 100.0).floor # P2,ID
when '%c'; o << strftime('%a %b %e %H:%M:%S %Y')
when '%D'; o << strftime('%m/%d/%y') # P2,ID
when '%d'; o << '%02d' % mday
when '%e'; o << '%2d' % mday
when '%F'; o << strftime('%Y-%m-%d') # ID
when '%G'; o << '%.4d' % cwyear # ID
when '%g'; o << '%02d' % (cwyear % 100) # ID
when '%H'; o << '%02d' % hour
when '%h'; o << strftime('%b') # P2,ID
when '%I'; o << '%02d' % ((hour % 12).nonzero? or 12)
when '%j'; o << '%03d' % yday
when '%k'; o << '%2d' % hour # AR,TZ,GL
when '%l'; o << '%2d' % ((hour % 12).nonzero? or 12) # AR,TZ,GL
when '%M'; o << '%02d' % min
when '%m'; o << '%02d' % mon
when '%n'; o << "\n" # P2,ID
when '%P'; o << if hour < 12 then 'am' else 'pm' end # GL
when '%p'; o << if hour < 12 then 'AM' else 'PM' end
when '%R'; o << strftime('%H:%M') # ID
when '%r'; o << strftime('%I:%M:%S %p') # P2,ID
when '%S'; o << '%02d' % sec
when '%s' # TZ,GL
d = ajd - self.class.jd_to_ajd(self.class.civil_to_jd(1970,1,1), 0)
s = (d * 86400).to_i
o << '%d' % s
when '%T'; o << strftime('%H:%M:%S') # P2,ID
when '%t'; o << "\t" # P2,ID
when '%U', '%W'
a = self.class.civil_to_jd(year, 1, 1, ns?) + 6
k = if c == '%U' then 0 else 1 end
w = (jd - (a - ((a - k) + 1) % 7) + 7) / 7
o << '%02d' % w
when '%u'; o << '%d' % cwday # P2,ID
when '%V'; o << '%02d' % cweek # P2,ID
when '%v'; o << strftime('%e-%b-%Y') # AR,TZ
when '%w'; o << '%d' % wday
when '%X'; o << strftime('%H:%M:%S')
when '%x'; o << strftime('%m/%d/%y')
when '%Y'; o << '%.4d' % year
when '%y'; o << '%02d' % (year % 100)
when '%Z'; o << (if offset.zero? then 'Z' else strftime('%z') end)
when '%z' # ID
o << if offset < 0 then '-' else '+' end
of = offset.abs
hh, fr = of.divmod(1.to_r/24)
mm = fr / (1.to_r/1440)
o << '%02d' % hh
o << '%02d' % mm
when '%%'; o << '%'
when '%+'; o << strftime('%a %b %e %H:%M:%S %Z %Y') # TZ
=begin
when '%.'
o << '%06d' % (sec_fraction / (1.to_r/86400/(10**6)))
=end
when '%1'; o << '%d' % jd
when '%2'; o << strftime('%Y-%j')
when '%3'; o << strftime('%Y-%m-%d')
else; o << c
end
end
o
end
# alias_method :format, :strftime
def asctime() strftime('%c') end
alias_method :ctime, :asctime
end
class DateTime < Date
def self._strptime(str, fmt='%FT%T%Z')
super(str, fmt)
end
def strftime(fmt='%FT%T%Z')
super(fmt)
end
end