DEFINITIONS
This source file includes following functions.
1 # format.rb: Written by Tadayoshi Funaba 1999-2002
2 # $Id: format.rb,v 2.8 2002-06-08 00:39:51+09 tadf Exp $
3
4 class Date
5
6 MONTHS = {
7 'january' => 1, 'february' => 2, 'march' => 3, 'april' => 4,
8 'may' => 5, 'june' => 6, 'july' => 7, 'august' => 8,
9 'september'=> 9, 'october' =>10, 'november' =>11, 'december' =>12
10 }
11
12 DAYS = {
13 'sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday'=> 3,
14 'thursday' => 4, 'friday' => 5, 'saturday' => 6
15 }
16
17 ABBR_MONTHS = {
18 'jan' => 1, 'feb' => 2, 'mar' => 3, 'apr' => 4,
19 'may' => 5, 'jun' => 6, 'jul' => 7, 'aug' => 8,
20 'sep' => 9, 'oct' =>10, 'nov' =>11, 'dec' =>12
21 }
22
23 ABBR_DAYS = {
24 'sun' => 0, 'mon' => 1, 'tue' => 2, 'wed' => 3,
25 'thu' => 4, 'fri' => 5, 'sat' => 6
26 }
27
28 ZONES = {
29 'ut' => 0*3600, 'gmt' => 0*3600, 'est' => -5*3600, 'edt' => -4*3600,
30 'cst' => -6*3600, 'cdt' => -5*3600, 'mst' => -7*3600, 'mdt' => -6*3600,
31 'pst' => -8*3600, 'pdt' => -7*3600,
32 'a' => 1*3600, 'b' => 2*3600, 'c' => 3*3600, 'd' => 4*3600,
33 'e' => 5*3600, 'f' => 6*3600, 'g' => 7*3600, 'h' => 8*3600,
34 'i' => 9*3600, 'k' => 10*3600, 'l' => 11*3600, 'm' => 12*3600,
35 'n' => -1*3600, 'o' => -2*3600, 'p' => -3*3600, 'q' => -4*3600,
36 'r' => -5*3600, 's' => -6*3600, 't' => -7*3600, 'u' => -8*3600,
37 'v' => -9*3600, 'w' =>-10*3600, 'x' =>-11*3600, 'y' =>-12*3600,
38 'z' => 0*3600,
39 'utc' => 0*3600, 'wet' => 0*3600, 'bst' => 1*3600, 'wat' => -1*3600,
40 'at' => -2*3600, 'ast' => -4*3600, 'adt' => -3*3600, 'yst' => -9*3600,
41 'ydt' => -8*3600, 'hst' =>-10*3600, 'hdt' => -9*3600, 'cat' =>-10*3600,
42 'ahst'=>-10*3600, 'nt' =>-11*3600, 'idlw'=>-12*3600, 'cet' => 1*3600,
43 'met' => 1*3600, 'mewt'=> 1*3600, 'mest'=> 2*3600, 'mesz'=> 2*3600,
44 'swt' => 1*3600, 'sst' => 2*3600, 'fwt' => 1*3600, 'fst' => 2*3600,
45 'eet' => 2*3600, 'bt' => 3*3600, 'zp4' => 4*3600, 'zp5' => 5*3600,
46 'zp6' => 6*3600, 'wast'=> 7*3600, 'wadt'=> 8*3600, 'cct' => 8*3600,
47 'jst' => 9*3600, 'east'=> 10*3600, 'eadt'=> 11*3600, 'gst' => 10*3600,
48 'nzt' => 12*3600, 'nzst'=> 12*3600, 'nzdt'=> 13*3600, 'idle'=> 12*3600
49 }
50
51 def self.__strptime(str, fmt, elem)
52 fmt.scan(/%[EO]?.|./o) do |c|
53 cc = c.sub(/\A%[EO]?(.)\Z/o, '%\\1')
54 case cc
55 when /\A\s/o
56 str.sub!(/\A[\s\v]+/o, '')
57 when '%A', '%a'
58 return unless str.sub!(/\A([a-z]+)\b/io, '')
59 val = DAYS[$1.downcase] || ABBR_DAYS[$1.downcase]
60 return unless val
61 elem[:wday] = val
62 when '%B', '%b', '%h'
63 return unless str.sub!(/\A([a-z]+)\b/io, '')
64 val = MONTHS[$1.downcase] || ABBR_MONTHS[$1.downcase]
65 return unless val
66 elem[:mon] = val
67 when '%C'
68 return unless str.sub!(/\A(\d+)/o, '')
69 val = $1.to_i
70 elem[:cent] = val
71 when '%c'
72 return unless __strptime(str, '%a %b %e %H:%M:%S %Y', elem)
73 when '%D'
74 return unless __strptime(str, '%m/%d/%y', elem)
75 when '%d', '%e'
76 return unless str.sub!(/\A ?(\d+)/o, '')
77 val = $1.to_i
78 return unless (1..31) === val
79 elem[:mday] = val
80 when '%F'
81 return unless __strptime(str, '%Y-%m-%d', elem)
82 when '%G'
83 return unless str.sub!(/\A([-+]?\d+)/o, '')
84 val = $1.to_i
85 elem[:cwyear] = val
86 when '%g'
87 return unless str.sub!(/\A(\d+)/o, '')
88 val = $1.to_i
89 return unless (0..99) === val
90 elem[:cwyear] = val
91 elem[:cent] ||= if val >= 69 then 19 else 20 end
92 when '%H', '%k'
93 return unless str.sub!(/\A ?(\d+)/o, '')
94 val = $1.to_i
95 return unless (0..24) === val
96 elem[:hour] = val
97 when '%I', '%l'
98 return unless str.sub!(/\A ?(\d+)/o, '')
99 val = $1.to_i
100 return unless (1..12) === val
101 elem[:hour] = val
102 when '%j'
103 return unless str.sub!(/\A(\d+)/o, '')
104 val = $1.to_i
105 return unless (1..366) === val
106 elem[:yday] = val
107 when '%M'
108 return unless str.sub!(/\A(\d+)/o, '')
109 val = $1.to_i
110 return unless (0..59) === val
111 elem[:min] = val
112 when '%m'
113 return unless str.sub!(/\A(\d+)/o, '')
114 val = $1.to_i
115 return unless (1..12) === val
116 elem[:mon] = val
117 when '%n'
118 return unless __strptime(str, ' ', elem)
119 when '%p', '%P'
120 return unless str.sub!(/\A([ap])(?:m\b|\.m\.)/io, '')
121 elem[:merid] = if $1.downcase == 'a' then 0 else 12 end
122 when '%R'
123 return unless __strptime(str, '%H:%M', elem)
124 when '%r'
125 return unless __strptime(str, '%I:%M:%S %p', elem)
126 when '%S'
127 return unless str.sub!(/\A(\d+)/o, '')
128 val = $1.to_i
129 return unless (0..60) === val
130 elem[:sec] = val
131 when '%s'
132 return unless str.sub!(/\A(\d+)/o, '')
133 val = $1.to_i
134 elem[:seconds] = val
135 when '%T'
136 return unless __strptime(str, '%H:%M:%S', elem)
137 when '%t'
138 return unless __strptime(str, ' ', elem)
139 when '%U', '%W'
140 return unless str.sub!(/\A(\d+)/o, '')
141 val = $1.to_i
142 return unless (0..53) === val
143 elem[if c == '%U' then :wnum0 else :wnum1 end] = val
144 when '%u'
145 return unless str.sub!(/\A(\d+)/o, '')
146 val = $1.to_i
147 return unless (1..7) === val
148 elem[:cwday] = val
149 when '%V'
150 return unless str.sub!(/\A(\d+)/o, '')
151 val = $1.to_i
152 return unless (1..53) === val
153 elem[:cweek] = val
154 when '%v'
155 return unless __strptime(str, '%e-%b-%Y', elem)
156 when '%w'
157 return unless str.sub!(/\A(\d+)/o, '')
158 val = $1.to_i
159 return unless (0..6) === val
160 elem[:wday] = val
161 when '%X'
162 return unless __strptime(str, '%H:%M:%S', elem)
163 when '%x'
164 return unless __strptime(str, '%m/%d/%y', elem)
165 when '%Y'
166 return unless str.sub!(/\A([-+]?\d+)/o, '')
167 val = $1.to_i
168 elem[:year] = val
169 when '%y'
170 return unless str.sub!(/\A(\d+)/o, '')
171 val = $1.to_i
172 return unless (0..99) === val
173 elem[:year] = val
174 elem[:cent] ||= if val >= 69 then 19 else 20 end
175 when '%Z', '%z'
176 return unless str.sub!(/\A([a-z0-9:+-]+(?:\s+dst\b)?)/io, '')
177 val = $1
178 elem[:zone] = val
179 offset = zone_to_diff(val)
180 elem[:offset] = offset
181 when '%%'
182 return unless str.sub!(/\A%/o, '')
183 when '%+'
184 return unless __strptime(str, '%a %b %e %H:%M:%S %Z %Y', elem)
185 when '%1'
186 return unless str.sub!(/\A(\d+)/o, '')
187 val = $1.to_i
188 elem[:jd] = val
189 when '%2'
190 return unless __strptime(str, '%Y-%j', elem)
191 when '%3'
192 return unless __strptime(str, '%F', elem)
193 else
194 return unless str.sub!(Regexp.new('\\A' + Regexp.quote(c)), '')
195 end
196 end
197
198 if cent = elem.delete(:cent)
199 if elem[:cwyear]
200 elem[:cwyear] += cent * 100
201 end
202 if elem[:year]
203 elem[:year] += cent * 100
204 end
205 end
206
207 if merid = elem.delete(:merid)
208 if elem[:hour]
209 elem[:hour] %= 12
210 elem[:hour] += merid
211 end
212 end
213
214 str
215 end
216
217 private_class_method :__strptime
218
219 def self._strptime(str, fmt='%F')
220 elem = {}
221 elem if __strptime(str.dup, fmt, elem)
222 end
223
224 PARSE_MONTHPAT = ABBR_MONTHS.keys.join('|')
225 PARSE_DAYPAT = ABBR_DAYS. keys.join('|')
226
227 def self._parse(str, comp=false)
228 str = str.dup
229
230 str.gsub!(/[^-+.\/:0-9a-z]+/ino, ' ')
231
232 # day
233 if str.sub!(/(#{PARSE_DAYPAT})\S*/ino, ' ')
234 wday = ABBR_DAYS[$1.downcase]
235 end
236
237 # time
238 if str.sub!(
239 /(\d+):(\d+)(?::(\d+))?
240 (?:
241 \s*
242 ([ap])(?:m\b|\.m\.)
243 )?
244 (?:
245 \s*
246 (
247 [a-z]+(?:\s+dst)?\b
248 |
249 [-+]\d+(?::?\d+)
250 )
251 )?
252 /inox,
253 ' ')
254 hour = $1.to_i
255 min = $2.to_i
256 sec = $3.to_i if $3
257
258 if $4
259 hour %= 12
260 if $4.downcase == 'p'
261 hour += 12
262 end
263 end
264
265 zone = $5
266 end
267
268 # eu
269 if str.sub!(
270 /(\d+)\S*
271 \s+
272 (#{PARSE_MONTHPAT})\S*
273 (?:
274 \s+
275 (-?\d+)
276 )?
277 /inox,
278 ' ')
279 mday = $1.to_i
280 mon = ABBR_MONTHS[$2.downcase]
281
282 if $3
283 year = $3.to_i
284 if $3.size > 2
285 comp = false
286 end
287 end
288
289 # us
290 elsif str.sub!(
291 /(#{PARSE_MONTHPAT})\S*
292 \s+
293 (\d+)\S*
294 (?:
295 \s+
296 (-?\d+)
297 )?
298 /inox,
299 ' ')
300 mon = ABBR_MONTHS[$1.downcase]
301 mday = $2.to_i
302
303 if $3
304 year = $3.to_i
305 if $3.size > 2
306 comp = false
307 end
308 end
309
310 # iso
311 elsif str.sub!(/([-+]?\d+)-(\d+)-(-?\d+)/no, ' ')
312 year = $1.to_i
313 mon = $2.to_i
314 mday = $3.to_i
315
316 if $1.size > 2
317 comp = false
318 elsif $3.size > 2
319 comp = false
320 mday, mon, year = year, mon, mday
321 end
322
323 # jis
324 elsif str.sub!(/([MTSH])(\d+)\.(\d+)\.(\d+)/no, ' ')
325 e = { 'M'=>1867,
326 'T'=>1911,
327 'S'=>1925,
328 'H'=>1988
329 }[$1]
330 year = $2.to_i + e
331 mon = $3.to_i
332 mday = $4.to_i
333
334 # vms
335 elsif str.sub!(/(-?\d+)-(#{PARSE_MONTHPAT})[^-]*-(-?\d+)/ino, ' ')
336 mday = $1.to_i
337 mon = ABBR_MONTHS[$2.downcase]
338 year = $3.to_i
339
340 if $1.size > 2
341 comp = false
342 year, mon, mday = mday, mon, year
343 elsif $3.size > 2
344 comp = false
345 end
346
347 # sla
348 elsif str.sub!(%r|(-?\d+)/(\d+)(?:/(-?\d+))?|no, ' ')
349 mon = $1.to_i
350 mday = $2.to_i
351
352 if $3
353 year = $3.to_i
354 if $3.size > 2
355 comp = false
356 end
357 end
358
359 if $1.size > 2
360 comp = false
361 year, mon, mday = mon, mday, year
362 end
363
364 # ddd
365 elsif str.sub!(
366 /([-+]?)(\d{4,14})
367 (?:
368 \s*
369 T?
370 \s*
371 (\d{2,6})
372 )?
373 (?:
374 \s*
375 (
376 Z
377 |
378 [-+]\d{2,4}
379 )
380 \b
381 )?
382 /nox,
383 ' ')
384 case $2.size
385 when 4
386 mon = $2[ 0, 2].to_i
387 mday = $2[ 2, 2].to_i
388 when 6
389 year = ($1 + $2[ 0, 2]).to_i
390 mon = $2[ 2, 2].to_i
391 mday = $2[ 4, 2].to_i
392 when 8, 10, 12, 14
393 year = ($1 + $2[ 0, 4]).to_i
394 mon = $2[ 4, 2].to_i
395 mday = $2[ 6, 2].to_i
396 hour = $2[ 8, 2].to_i if $2.size >= 10
397 min = $2[10, 2].to_i if $2.size >= 12
398 sec = $2[12, 2].to_i if $2.size >= 14
399 comp = false
400 end
401 if $3
402 case $3.size
403 when 2, 4, 6
404 hour = $3[ 0, 2].to_i
405 min = $3[ 2, 2].to_i if $3.size >= 4
406 sec = $3[ 4, 2].to_i if $3.size >= 6
407 end
408 end
409 zone = $4
410 end
411
412 if str.sub!(/\b(bc\b|bce\b|b\.c\.|b\.c\.e\.)/ino, ' ')
413 if year
414 year = -year + 1
415 end
416 end
417
418 if comp and year
419 if year >= 0 and year <= 99
420 if year >= 69
421 year += 1900
422 else
423 year += 2000
424 end
425 end
426 end
427
428 elem = {}
429 elem[:year] = year if year
430 elem[:mon] = mon if mon
431 elem[:mday] = mday if mday
432 elem[:hour] = hour if hour
433 elem[:min] = min if min
434 elem[:sec] = sec if sec
435 elem[:zone] = zone if zone
436 offset = zone_to_diff(zone) if zone
437 elem[:offset] = offset if offset
438 elem[:wday] = wday if wday
439 elem
440 end
441
442 def self.zone_to_diff(str)
443 abb, dst = str.downcase.split(/\s+/o, 2)
444 if ZONES.include?(abb)
445 offset = ZONES[abb]
446 offset += 3600 if dst
447 elsif /\A([+-])(\d{2}):?(\d{2})?\Z/no =~ str
448 offset = $2.to_i * 3600 + $3.to_i * 60
449 offset *= -1 if $1 == '-'
450 end
451 offset
452 end
453
454 def strftime(fmt='%F')
455 o = ''
456 fmt.scan(/%[EO]?.|./o) do |c|
457 cc = c.sub(/^%[EO]?(.)$/o, '%\\1')
458 case cc
459 when '%A'; o << DAYNAMES[wday]
460 when '%a'; o << ABBR_DAYNAMES[wday]
461 when '%B'; o << MONTHNAMES[mon]
462 when '%b'; o << ABBR_MONTHNAMES[mon]
463 when '%C'; o << '%02d' % (year / 100.0).floor # P2,ID
464 when '%c'; o << strftime('%a %b %e %H:%M:%S %Y')
465 when '%D'; o << strftime('%m/%d/%y') # P2,ID
466 when '%d'; o << '%02d' % mday
467 when '%e'; o << '%2d' % mday
468 when '%F'; o << strftime('%Y-%m-%d') # ID
469 when '%G'; o << '%.4d' % cwyear # ID
470 when '%g'; o << '%02d' % (cwyear % 100) # ID
471 when '%H'; o << '%02d' % hour
472 when '%h'; o << strftime('%b') # P2,ID
473 when '%I'; o << '%02d' % ((hour % 12).nonzero? or 12)
474 when '%j'; o << '%03d' % yday
475 when '%k'; o << '%2d' % hour # AR,TZ,GL
476 when '%l'; o << '%2d' % ((hour % 12).nonzero? or 12) # AR,TZ,GL
477 when '%M'; o << '%02d' % min
478 when '%m'; o << '%02d' % mon
479 when '%n'; o << "\n" # P2,ID
480 when '%P'; o << if hour < 12 then 'am' else 'pm' end # GL
481 when '%p'; o << if hour < 12 then 'AM' else 'PM' end
482 when '%R'; o << strftime('%H:%M') # ID
483 when '%r'; o << strftime('%I:%M:%S %p') # P2,ID
484 when '%S'; o << '%02d' % sec
485 when '%s' # TZ,GL
486 d = ajd - type.jd_to_ajd(type.civil_to_jd(1970,1,1), 0)
487 s = (d * 86400).to_i
488 o << '%d' % s
489 when '%T'; o << strftime('%H:%M:%S') # P2,ID
490 when '%t'; o << "\t" # P2,ID
491 when '%U', '%W'
492 a = type.civil_to_jd(year, 1, 1, ns?) + 6
493 k = if c == '%U' then 0 else 1 end
494 w = (jd - (a - ((a - k) + 1) % 7) + 7) / 7
495 o << '%02d' % w
496 when '%u'; o << '%d' % cwday # P2,ID
497 when '%V'; o << '%02d' % cweek # P2,ID
498 when '%v'; o << strftime('%e-%b-%Y') # AR,TZ
499 when '%w'; o << '%d' % wday
500 when '%X'; o << strftime('%H:%M:%S')
501 when '%x'; o << strftime('%m/%d/%y')
502 when '%Y'; o << '%.4d' % year
503 when '%y'; o << '%02d' % (year % 100)
504 when '%Z'; o << zone
505 when '%z'; o << zone # ID
506 when '%%'; o << '%'
507 when '%+'; o << strftime('%a %b %e %H:%M:%S %Z %Y') # TZ
508 when '%1'; o << '%d' % jd
509 when '%2'; o << strftime('%Y-%j')
510 when '%3'; o << strftime('%Y-%m-%d')
511 else; o << c
512 end
513 end
514 o
515 end
516
517 # alias_method :format, :strftime
518
519 def asctime() strftime('%c') end
520
521 alias_method :ctime, :asctime
522
523 end
524
525 class DateTime < Date
526
527 def self._strptime(str, fmt='%FT%T%Z')
528 super(str, fmt)
529 end
530
531 def strftime(fmt='%FT%T%Z')
532 super(fmt)
533 end
534
535 end