-
Notifications
You must be signed in to change notification settings - Fork 0
/
jd-time-utils-cl-date-time-parser.lisp
980 lines (837 loc) · 38.1 KB
/
jd-time-utils-cl-date-time-parser.lisp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
;;;; Last modified: 2014-05-18 14:40:06 tkych
;; cl-date-time-parser/date-time-parser.lisp
;; Copyright (c) 2013 Takaya OCHIAI <[email protected]>
;; This software is released under the MIT License.
;; For more details, see cl-date-time-parser/LICENSE
;;
;; SLIGHTLY MODIFIED FOR TIME-UTILS, to use
;; encode-universal-time/extended and decode-universal-time/extended
#|
Original License
================================================================
Copyright (c) 2013 Takaya OCHIAI
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
================================================================
|#
;;====================================================================
;; Date-Time-Parser
;;====================================================================
(in-package :cl-user)
(defpackage #:cl-date-time-parser/jd-time-utils
(:use :cl)
(:import-from #:anaphora #:it #:aif #:acond)
(:import-from #:split-sequence #:split-sequence)
(:import-from #:parse-float #:parse-float) ;; note that we use OUR parse float, not internet
(:export #:parse-date-time))
(in-package #:cl-date-time-parser/jd-time-utils)
;;--------------------------------------------------------------------
;; Eval-Test for CL-Date-Time-Parser
;;--------------------------------------------------------------------
(eval-when (:compile-toplevel :load-toplevel :execute)
(defparameter *features-tmp* *features*)
;; when release, the following line should be comment in.
(setf *features* (remove :et *features*))
;; when release, the following two lines should be comment out.
;; (ql:quickload '(:cl-ppcre :split-sequence :anaphora :local-time :parse-float))
;; (pushnew :et *features*)
)
#+et
(eval-when (:compile-toplevel :load-toplevel :execute)
(defmacro =>? (form want &optional test)
"Check whether FORM is evaluated to WANT by TEST (default is `equal`).
If first element of WANT is `:values`, then check mutiple values."
(if (and (listp want) (eq :values (first want)))
`(assert (funcall ,(if test test ''equal)
(multiple-value-list ,form)
(list ,@(rest want))))
`(assert (funcall ,(if test test ''equal)
,form ,want))))
(defmacro =>t? (form)
"Check whether FORM is evaluated to T."
`(=>? ,form t))
(defmacro =>nil? (form)
"Check whether FORM is evaluated to NIL."
`(=>? ,form nil))
) ;end of #+et
;;--------------------------------------------------------------------
;; Special Variables
;;--------------------------------------------------------------------
(eval-when (:compile-toplevel :load-toplevel :execute)
(defconstant +second+ 1)
(defconstant +minuite-secs+ (* 60 +second+))
(defconstant +hour-secs+ (* 60 +minuite-secs+))
(defconstant +day-secs+ (* 24 +hour-secs+)))
(defparameter *month-vec-in-normal-year*
#("0 is not month number."
0 2678400 5097600 7776000 10368000 13046400 15638400 18316800
20995200 23587200 26265600 28857600))
(defparameter *month-vec-in-leap-year*
#("0 is not month number."
0 2678400 5184000 7862400 10454400 13132800 15724800 18403200
21081600 23673600 26352000 28944000))
(defparameter *month-ht-in-normal-year*
(alexandria:plist-hash-table
'("Jan" 0
"Feb" 2678400
"Mar" 5097600
"Apr" 7776000
"May" 10368000
"Jun" 13046400
"Jul" 15638400
"Aug" 18316800
"Sep" 20995200
"Oct" 23587200
"Nov" 26265600
"Dec" 28857600
;; invalid month name
"January" 0
"February" 2678400
"March" 5097600
"April" 7776000
"May" 10368000
"June" 13046400
"July" 15638400
"August" 18316800
"September" 20995200
"October" 23587200
"November" 26265600
"December" 28857600)
:test #'equalp))
(defparameter *month-ht-in-leap-year*
(alexandria:plist-hash-table
'("Jan" 0
"Feb" 2678400
"Mar" 5184000
"Apr" 7862400
"May" 10454400
"Jun" 13132800
"Jul" 15724800
"Aug" 18403200
"Sep" 21081600
"Oct" 23673600
"Nov" 26352000
"Dec" 28944000
;; invalid month name
"January" 0
"February" 2678400
"March" 5184000
"April" 7862400
"May" 10454400
"June" 13132800
"July" 15724800
"August" 18403200
"September" 21081600
"October" 23673600
"November" 26352000
"December" 28944000)
:test #'equalp))
(defparameter *tz-abbrev-to-offset*
(alexandria:plist-hash-table
'("UT" 0
"GMT" 0
"ADT" +10800 ;; JTK - it looks like timezone signs were reversed
"AST" +14400
"EDT" +14400
"EST" +18000
"CDT" +18000
"CST" +21600
"MDT" +21600
"MST" +25200
"PDT" +25200
"PST" +28800
"AT" +14400
"ET" +18000
"CT" +21600
"MT" +25200
"PT" +28800
;; Memo: Military-time-zone is defined by rfc822, and obsoluted by rfc1123,
;; rfc2822 and rfc5322. For more details see. rfc1123, 5.2.14.
"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)
;; Zulu time
"Z" 0
)
:test #'equalp))
(defparameter *day-of-week*
(alexandria:plist-hash-table
'("Mon" 1
"Tue" 1
"Wed" 1
"Thu" 1
"Fri" 1
"Sat" 1
"Sun" 1
;; invalid day name
"Monday" 1
"Tuesday" 1
"Wednesday" 1
"Thursday" 1
"Friday" 1
"Saturday" 1
"Sunday" 1)
:test #'equalp))
;;--------------------------------------------------------------------
;; Parse-Date-Time
;;--------------------------------------------------------------------
;; JTK - added locking around hash table manipulation
(let ((tz-lock (bordeaux-threads:make-lock "timezone-hashl-lock")))
(defun get-offset (tz-abbrev)
(aif (bordeaux-threads:with-lock-held (tz-lock)
(gethash tz-abbrev *tz-abbrev-to-offset* nil))
it
(let ((offset (handler-case
(calc-offset tz-abbrev)
(error ()
(error "~S is not parsed as time-zone."
tz-abbrev)))))
(bordeaux-threads:with-lock-held (tz-lock)
(setf (gethash tz-abbrev *tz-abbrev-to-offset*)
offset))))))
;; !!! UGLY: using un-official api for local-time. !!!
(defun calc-offset (tz-abbrev)
"Return offset for the time-zone-abbrev. If not find offset, return NIL."
(symbol-macrolet ((timezones local-time::*abbreviated-subzone-name->timezone-list*))
(let ((tz (aif (gethash tz-abbrev timezones nil)
(first it)
(when (zerop (hash-table-count timezones))
(local-time::reread-timezone-repository)
(first (gethash tz-abbrev timezones nil))))))
(when tz
(loop
:for sub :across (local-time::timezone-subzones tz)
:do (when (equal tz-abbrev (local-time::subzone-abbrev sub))
(return (- (local-time::subzone-offset sub)))))))))
#+et (=>? (get-offset "JST") (* +9 60 60))
#+et (=>? (get-offset "GMT") 0)
#+et (=>? (get-offset "MDT") (* +6 60 60))
(defun year-to-ut (year)
(jd-time-utils:encode-universal-time/extended 0 0 0 1 1 year :timezone 0))
#+et (=>? (year-to-ut 1900) 0)
#+et (=>? (year-to-ut 1901) (* 365 24 60 60))
#+et (=>? (year-to-ut 1902) (+ (year-to-ut 1901) (* 365 24 60 60)))
#+et (=>? (year-to-ut 1905) (+ (year-to-ut 1904) (* 366 24 60 60)))
#+et (=>? (year-to-ut 2000)
(local-time:timestamp-to-universal
(local-time:parse-timestring "2000-01-01T00:00:00Z")))
#+et (=>? (year-to-ut 2013)
(local-time:timestamp-to-universal
(local-time:parse-timestring "2013-01-01T00:00:00Z")))
(defun leap-year-p (year)
"Return T if YEAR is a leap year, otherwise NIL.
c.f. RFC3339, (Appendix C. Leap Years)"
(check-type year (integer 1000 9999))
(and (zerop (mod year 4))
(or (not (zerop (mod year 100)))
(zerop (mod year 400)))))
#+et (=>nil? (leap-year-p 1999))
#+et (=>t? (leap-year-p 2000))
#+et (=>nil? (leap-year-p 2001))
(defun month-to-ut (month leap-year?)
(etypecase month
(string (gethash month (if leap-year?
*month-ht-in-leap-year*
*month-ht-in-normal-year*)))
(integer (svref (if leap-year?
*month-vec-in-leap-year*
*month-vec-in-normal-year*)
month))))
#+et (=>t? (and (every (lambda (m) (= (month-to-ut m t)
(month-to-ut m nil)))
'("Jan" "January" 1))
(every (lambda (m) (= (month-to-ut m t)
(month-to-ut m nil)))
'("Feb" "February" 2))
(every (lambda (m) (= (* 24 60 60)
(- (month-to-ut m t)
(month-to-ut m nil))))
'("Mar" "March" 3))
(every (lambda (m) (= (* 24 60 60)
(- (month-to-ut m t)
(month-to-ut m nil))))
'("Apr" "April" 4))
(every (lambda (m) (= (* 24 60 60)
(- (month-to-ut m t)
(month-to-ut m nil))))
'("Dec" "December" 12))))
(defun parse-rfc822-genus (date-time-string)
"Parse DATE-TIME-STRING with RFC822 (RFC1123, RFC2822, RFC5322),
RFC850 (RFC1036) or asctime format, and return
(values UNIVERSAL-TIME FRACTION).
Reference:
* RFC822 -- http://tools.ietf.org/html/rfc822
* RFC2822 -- http://tools.ietf.org/html/rfc2822
* RFC5322 -- http://tools.ietf.org/html/rfc5322
* RFC850 -- http://tools.ietf.org/html/rfc850
* RFC1036 -- http://tools.ietf.org/html/rfc1036
* asctime -- http://en.cppreference.com/w/c/chrono/asctime
"
(let ((universal-time 0)
(fraction 0)
(leap-year? 0)
(month nil)
(day-parsed? nil))
(flet ((parse-time-part (token)
;; hh:mm(:ss([:.]ss?)?)?
(let ((time-parts (ppcre:split "[.:]" token)))
(loop
:for d :in time-parts
:for secs :in '#.(list +hour-secs+ +minuite-secs+ +second+)
:do (incf universal-time (* secs (parse-integer d))))
(when (= 4 (length time-parts))
(let ((frac-part (car (last time-parts))))
(setf fraction
(parse-float
(replace (copy-seq "0.0000")
frac-part :start1 2)))))))
(parse-year (year)
(incf universal-time (year-to-ut year))
(setf leap-year? (leap-year-p year)))
(parse-days (token) ; "DD"
(let ((num-days (parse-integer token)))
(incf universal-time (* (1- num-days) +day-secs+)))))
(dolist (token (ppcre:split "(?=[+-]\\d{2}:?\\d{2})|[, -]|(?=\\d[A-Za-z]+$)"
date-time-string))
(when (string/= "" token)
;; Memo:
;; * Check whether last char is digit-char or not,
;; in order to interpret "+9000" and "4" as num-token
;; !! TODO: check all time-zone-abbrev, whether not using digit-chars.
;; * alpha-char-p return T only when [a-zA-Z].
;; Using digit-char-p, we enable to extend
;; *month-secs-in-normal-year(or leap-year)* to non-alphabet local chars.
(if (not (digit-char-p (char token (1- (length token)))))
;; A. Parse char-token
(acond
;; Memo: consistency is not checking.
;; i.e. "Mon, 21 Jul 2013 07:22:21 GMT" and "Sun, 21 Jul 2013 07:22:21 GMT"
;; are parsed to the same universal time value.
((gethash token *day-of-week* nil)
nil)
;; we don't know the year yet, calc month is after parse year.
((gethash token *month-ht-in-normal-year* nil)
(setf month token))
((get-offset token)
(incf universal-time it))
(t nil))
;; B. Parse num-token
(case (length token)
;; "DD", "YY"
((1 2) (if day-parsed?
(let* ((num (parse-integer token))
;; c.f. rfc5322, p.34 (4.3. Obsolete Date and Time)
(year (cond ((<= 0 num 49) (+ 2000 num))
((<= 50 num 99) (+ 1900 num))
(t num))))
(parse-year year))
(progn
(parse-days token)
(setf day-parsed? t))))
;; "YYY", c.f. rfc5322, p.34 (4.3. Obsolete Date and Time)
(3 (parse-year (+ 1900 (parse-integer token))))
;; "YYYY"
(4 (parse-year (parse-integer token)))
;; hh:mm(:ss)?([+-]hh:?mm)? or [+-]hh:?mm
(t (let ((tokens (ppcre:split "[+-]" token)))
(ecase (length tokens)
;; "hh:mm:ss.ss", "hh:mm:ss", "hh:mm"
(1 (parse-time-part token))
;; "hh:mm:ss+hh:mm", "hh:mm:ss+hhmm", "hh:mm+hh:mm", "hh:mm+hhmm"
(2 (destructuring-bind (time time-zone) tokens
(parse-time-part time)
(let ((sign (if (find #\+ token) -1 +1)) ;sign becomes inverse
(hour (parse-integer time-zone :end 2))
(minute (parse-integer
time-zone :start (if (find #\: time-zone) 3 2))))
(incf universal-time (* sign (+ (* hour #.+hour-secs+)
(* minute #.+minuite-secs+))))))))))))))
(when (equal 0 leap-year?)
;; Memo: get-decoded-time returns date-time depending system time-zone.
(let ((this-year (nth-value 5 (jd-time-utils:decode-universal-time/extended
(get-universal-time) :timezone 0))))
(warn "YEAR was not detected in ~S as RFC822-Genus. YEAR was supplemented with this year, \"~S\"."
date-time-string this-year)
(parse-year this-year)))
(incf universal-time (month-to-ut month leap-year?)))
(values universal-time fraction)))
#+et (flet ((rfc822 (x) (parse-rfc822-genus x))
(enc (&rest args) (apply #'encode-universal-time args)))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00 GMT")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00 gmt")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00 Z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00Z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00 z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (rfc822 "Sat, 02 Mar 2013 01:23:45 EDT")
(:values (enc 45 23 1 2 3 2013 -4) 0))
(=>? (rfc822 "Sat, 02 Mar 2013 01:23:45 FOOBAZBAR")
(:values (enc 45 23 1 2 3 2013 0) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00 JST")
(:values (enc 0 0 0 1 1 2013 -9) 0))
(=>? (rfc822 "Sat, 01 Feb 2013 01:23:45 JST")
(:values (enc 45 23 1 1 2 2013 -9) 0))
(=>? (rfc822 "01 Dec 13 00:00 JST")
(:values (enc 0 0 0 1 12 2013 -9) 0))
(=>? (rfc822 "24 Dec 49 12:00 EST")
(:values (enc 0 0 12 24 12 2049 -5) 0))
(=>? (rfc822 "24 Dec 50 12:00 EST")
(:values (enc 0 0 12 24 12 1950 -5) 0))
(=>? (rfc822 "Sat, 01 Jan 2000 00:00:00.42 GMT")
(:values (enc 0 0 0 1 1 2000 0) 0.42))
(=>? (rfc822 "Sat, 01 Jan 2000 00:00:00:42 GMT")
(:values (enc 0 0 0 1 1 2000 0) 0.42))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00 +0700")
(:values (enc 0 0 0 1 1 2013 -7) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00+1300")
(:values (enc 0 0 0 1 1 2013 -13) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00 +07:00")
(:values (enc 0 0 0 1 1 2013 -7) 0))
(=>? (rfc822 "Sat, 01 Jan 2013 00:00:00+13:00")
(:values (enc 0 0 0 1 1 2013 -13) 0))
(=>? (rfc822 "Sat, 01 Mar 2008 19:42:34 -0500")
(:values (enc 34 42 19 1 3 2008 5) 0))
(=>? (rfc822 "Sat, 01 Mar 2008 19:42:34-0500")
(:values (enc 34 42 19 1 3 2008 5) 0))
(=>? (rfc822 "Sat, 01 Mar 2008 19:42:34 -05:00")
(:values (enc 34 42 19 1 3 2008 5) 0))
(=>? (rfc822 "Sat, 01 Mar 2008 19:42:34-05:00")
(:values (enc 34 42 19 1 3 2008 5) 0))
(=>? (rfc822 "Thu, 01 Jan 2004")
(:values (enc 0 0 0 1 1 2004 0) 0))
(=>? (rfc822 "01 Jan 2004")
(:values (enc 0 0 0 1 1 2004 0) 0))
(=>? (rfc822 "1 Jan 04")
(:values (enc 0 0 0 1 1 2004 0) 0))
(=>? (rfc822 "Sun Jan 4 16:29:06 PST 2004")
(:values (enc 6 29 16 4 1 2004 -8) 0))
(=>? (rfc822 "Thu Jul 23 19:42:23 JST 2013")
(:values (enc 23 42 19 23 7 2013 -9) 0))
(=>? (rfc822 "Thudesday, 23-Jul-13 19:42:23 GMT")
(:values (enc 23 42 19 23 7 2013 0) 0))
;; supplemental this year
(let ((this-year (nth-value 5 (decode-universal-time
(get-universal-time) 0))))
(=>? (rfc822 "Thu, 01 Jan")
(:values (enc 0 0 0 1 1 this-year 0) 0))
(=>? (rfc822 "01 Jan")
(:values (enc 0 0 0 1 1 this-year 0) 0))
(=>? (rfc822 "1 Jan")
(:values (enc 0 0 0 1 1 this-year 0) 0)))
)
(defun parse-iso8601-genus (date-time-string)
"Parse DATE-TIME-STRING with ISO8601, W3CDTF or RFC3339 format,
and return (values UNIVERSAL-TIME FRACTION).
Reference:
* ISO8601:1988, 2000, 2004
-- http://www.iso.org/iso/home/standards/iso8601.htm
* W3CDTF -- http://www.w3.org/TR/1998/NOTE-datetime-19980827
* RFC3339 -- http://tools.ietf.org/html/rfc3339
"
(let* ((universal-time 0)
(fraction 0)
(leap-year? nil)
;; date-time separater is #\T, #\t or #\Space, c.f. rfc3339, 5.6.
(date-time (ppcre:split "(?<=\\d)[Tt ](?=\\d|$)" date-time-string))
(date-part (first date-time))
(time-part (second date-time)))
(when time-part
(let* ((time-zone (ppcre:split "(?<=\\d)(?=[zZ+-])" time-part))
(time-part (first time-zone))
(zone-part (second time-zone)))
;; 0. Parse ZONE-part:
(when zone-part
(unless (string-equal "Z" zone-part)
(case (length zone-part)
((2 3) ; "+h", "+hh"
(decf universal-time (* #.+hour-secs+ (parse-integer zone-part))))
(5 ; "+hhmm"
(multiple-value-bind (h m)
(truncate (parse-integer zone-part) 100)
(decf universal-time (+ (* h #.+hour-secs+) (* m #.+minuite-secs+)))))
(6 ; "+hh:mm"
(multiple-value-bind (h m)
(truncate (parse-integer (remove #\: zone-part)) 100)
(decf universal-time (+ (* h #.+hour-secs+) (* m #.+minuite-secs+)))))
(t
(error "~S in ~S is unknown time-format as ISO8601-Genus"
zone-part date-time-string)))))
;; 1. Parse TIME-part:
(if (every #'digit-char-p time-part)
(loop ;Basic format: "hh", "hhmm", "hhmmss", "hhmmssss"
:repeat (ceiling (length time-part) 2)
:for (start end) :in '((0 2) (2 4) (4 6))
:for num := (parse-integer time-part :start start :end end)
:for secs :in '#.(list +hour-secs+ +minuite-secs+ +second+)
:do (incf universal-time (* num secs))
:finally (when (<= 7 (length time-part))
(setf fraction
(parse-float (replace time-part "00000.")))))
(loop ;Extended format: "hh:mm", "hh:mm:ss", "hh:mm:ss,ss"
:for d :in (ppcre:split "[:,.]" time-part) ;"," for iso8601, "." for rfc3339
:for secs :in '#.(list +hour-secs+ +minuite-secs+ +second+)
:do (incf universal-time (* (parse-integer d) secs))
:finally (when (<= 10 (length time-part))
(setf fraction
(parse-float (replace time-part "00000000."))))))))
;; 2. Parse DATE-part:
(labels
;; 2.0. Parse DATE-part (local functions):
((parse-weeks (token) ;"Www"
(let ((num-weeks (parse-integer token :start 1 :end 3)))
(incf universal-time (* 7 (1- num-weeks) +day-secs+))))
(parse-days (token) ;"D", "DDD"
(let ((num-days (parse-integer token)))
(incf universal-time (* (1- num-days) +day-secs+))))
(parse-month (month leap-year?)
(incf universal-time (month-to-ut month leap-year?)))
(parse-year (year)
(incf universal-time (year-to-ut year))
(setf leap-year? (leap-year-p year)))
(parse-extended-format (date)
;; Parse iso8601 extended format
;; "YYYY-MM", "YY-MM-DD", "YYYY-MM-DD", "YYYY-DDD", "YYYY-Www-D", "YYYYYY-DDD"
(loop
:for token :in (split-sequence #\- date)
:with year-parsed? := nil
:with month-parsed? := nil
:do (case (length token)
;; "YY", "MM", "DD"
(2 (if year-parsed?
(if month-parsed?
(parse-days token)
(progn
(parse-month (parse-integer token) leap-year?)
(setf month-parsed? t)))
(progn
;; c.f. RFC 3339, 3. Two Digit Years, last item
(when (<= #.(char-code #\:) (char-code (char token 0)))
(let ((broken-two-digit-year (copy-seq token)))
(setf (char token 0)
(digit-char (- (char-code (char token 0)) #.(char-code #\:))))
(warn "Broken two-digit year ~S was parsed as \"~S\". (c.f. RFC 3339, 3.)"
broken-two-digit-year (+ 2000 (parse-integer token)))))
(parse-year (+ 2000 (parse-integer token)))
(setf year-parsed? t))))
;; "YYYY", "YYYYYY"
((4 6) (parse-year (parse-integer token))
(setf year-parsed? t))
;; "Www", "D", "DDD"
((1 3) (if (find #\W token :test #'char-equal)
(parse-weeks token)
(parse-days token)))
(t (error "~S in ~S is unknown time-format as ISO8601-Genus"
token date)))))
(parse-basic-format (date)
;; Parse iso8601 basic format
;; "CC", "DDD", "YYYY", "YYDDD", "YYMMDD", "YYYYDDD", "YYYYMMDD"
(case (length date)
;; Memo:
;; ISO8601-century format can not be parsed.
;; ISO8601-century is a 2-digit which slided forward 99 years comparing to ordinay-century.
;; e.g. 20 iso8601-century means the year between 2000 and 2099,
;; whereas usually 20th century means the year between 1901 and 2000.
;; "CC"
(2 (error "ISO8601 century ~S could not be parsed." date))
;; "DDD"
(3 (parse-days date))
;; "YYYY"
(4 (parse-year (parse-integer date)))
;; "YYDDD"
(5 ;; c.f. RFC 3339, 3. Two Digit Years, last item
(when (<= #.(char-code #\:) (char-code (char date 0)))
(let ((broken-two-digit-year (subseq date 0 2)))
(setf (char date 0)
(digit-char (- (char-code (char date 0)) #.(char-code #\:))))
(warn "Broken two-digit year ~S was parsed as \"~S\". (c.f. RFC 3339, 3.)"
broken-two-digit-year (+ 2000 (parse-integer date :start 0 :end 2)))))
(parse-year (+ 2000 (parse-integer date :start 0 :end 2)))
(parse-days (subseq date 2)))
;; "YYMMDD"
(6 (parse-year (+ 2000 (parse-integer date :start 0 :end 2)))
(parse-month (parse-integer date :start 2 :end 4) leap-year?)
(parse-days (subseq date 4)))
;; "YYYYDDD"
(7 (parse-year (parse-integer date :start 0 :end 4))
(parse-days (subseq date 4)))
;; "YYYYMMDD"
(8 (parse-year (parse-integer date :start 0 :end 4))
(parse-month (parse-integer date :start 4 :end 6) leap-year?)
(parse-days (subseq date 6)))
(t (error "~S in ~S is unknown time-format as ISO8601-Genus"
date date-time-string)))))
;; 2.1. Parse DATE-part (main):
(if (find #\- date-part)
;; Extended format:
;; "-YY", "-YY-MM", "-YYMM", "-YY-MM-DD",
;; "YYYY-MM", "YYYY-MM-DD", "YYYY-DDD", "YYYY-Www-D", "YYYYYY-DDD"
(if (char= #\- (char date-part 0))
;; "-YY", "-YY-MM", "-YYMM", "-YY-MM-DD" -> "20YY", "20YY-MM", "20YYMM", "20YY-MM-DD"
(let ((replaced (ppcre:regex-replace "-" date-part "20")))
(if (find #\- replaced)
;; "20YY-MM", "20YY-MM-DD"
(parse-extended-format replaced)
;; "20YY", "20YYMM" -> "20YY0101", "20YYMM01"
(parse-basic-format (replace (copy-seq "00000101") replaced))))
;; "YYYY-MM", "YYYY-MM-DD", "YYYY-DDD", "YYYY-Www-D", "YYYYYY-DDD"
(parse-extended-format date-part))
;; Basic format:
;; "CC", "YYYY", "YYDDD", "YYMMDD", "YYYYMMDD", "YYYYWwwD"
(parse-basic-format date-part)))
;; 3. Return values
(values universal-time fraction)))
#+et (flet ((iso8601 (x) (parse-iso8601-genus x))
(enc (&rest args) (apply #'encode-universal-time args)))
(=>? (iso8601 "2000-01-01T00:00:00Z")
(:values (enc 0 0 0 1 1 2000 0) 0))
(=>? (iso8601 "2003-12-31T10:14:55.7-08:00")
(:values (enc 55 14 10 31 12 2003 +8) 0.7))
(=>? (iso8601 "2003-12-31T10:14:55.7-0800")
(:values (enc 55 14 10 31 12 2003 +8) 0.7))
(=>? (iso8601 "2003-12-31T10:14:55+08:00")
(:values (enc 55 14 10 31 12 2003 -8) 0))
(=>? (iso8601 "2003-12-31T10:14:55+0800")
(:values (enc 55 14 10 31 12 2003 -8) 0))
(=>? (iso8601 "2003-12-31T10:14:55.7Z")
(:values (enc 55 14 10 31 12 2003 0) 0.7))
(=>? (iso8601 "2003-12-31T10:14:55Z")
(:values (enc 55 14 10 31 12 2003 0) 0))
(=>? (iso8601 "2003-12-31T10:14Z")
(:values (enc 0 14 10 31 12 2003 0) 0))
(=>? (iso8601 "2003-12-31T101455-08:00")
(:values (enc 55 14 10 31 12 2003 +8) 0))
(=>? (iso8601 "2003-12-31T101455-0800")
(:values (enc 55 14 10 31 12 2003 +8) 0))
(=>? (iso8601 "2003-12-31T1014-08:00")
(:values (enc 0 14 10 31 12 2003 +8) 0))
(=>? (iso8601 "2003-12-31T1014-0800")
(:values (enc 0 14 10 31 12 2003 +8) 0))
(=>? (iso8601 "2003-12-31T1014557Z")
(:values (enc 55 14 10 31 12 2003 0) 0.7))
(=>? (iso8601 "2003-12-31T101455Z")
(:values (enc 55 14 10 31 12 2003 0) 0))
(=>? (iso8601 "2003-12-31T1014Z")
(:values (enc 0 14 10 31 12 2003 0) 0))
(=>? (iso8601 "2003-12-31T10Z")
(:values (enc 0 0 10 31 12 2003 0) 0))
(=>? (iso8601 "2003")
(:values (enc 0 0 0 1 1 2003 0) 0))
(=>? (iso8601 "2003-12")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (iso8601 "2003-12-31")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (iso8601 "20031231")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (iso8601 "-03-12")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (iso8601 "-03")
(:values (enc 0 0 0 1 1 2003 0) 0))
(=>? (iso8601 "-0312")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (iso8601 "-03-12-31")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (iso8601 "03-12-31")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (iso8601 "031231")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (iso8601 "2003335")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (iso8601 "2003-335")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (iso8601 "03335")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (iso8601 "03-335")
(:values (enc 0 0 0 1 12 2003 0) 0))
)
(defun parse-date-time (date-time-string)
"Parse DATE-TIME-STRING, and return (values UNIVERSAL-TIME FRACTION).
DATE-TIME-STRING must represent the date-time after 1900-01-01T00:00:00Z.
Parsable Formats:
* RFC822 Genus: RFC822 (RFC1123, RFC2822, RFC5322), RFC850 (RFC1036) and asctime.
* ISO8601 Genus: ISO 8601 (:1988, :2000 and :2004. except for no-year format),
W3CDTF, RFC3339.
* Broken format: The above formats with little broken.
Examples:
* (parse-date-time \"Thu, 23 Jul 2013 19:42:23 JST\")
=> 3583564943, 0
* (parse-date-time \"2013-07-23T19:42:23+09:00\")
=> 3583564943, 0
* (parse-date-time \"23 Jul 13 19:42:23 +0900\")
=> 3583564943, 0
* (parse-date-time \"Thu Jul 23 19:42:23 JST 2013\")
=> 3583564943, 0
* (parse-date-time \"2013-07-23T19:42:23.45Z\")
=> 3583597343, 0.45
For more examples, see Eval-Test in date-time-parser.lisp"
(check-type date-time-string string)
(if (ppcre:scan "[a-zA-Z]{2}" date-time-string)
(parse-rfc822-genus date-time-string)
(parse-iso8601-genus date-time-string)))
#+et (flet ((parse (x) (parse-date-time x))
(enc (&rest args) (apply #'encode-universal-time args)))
;; rfc822-genus
(=>? (parse "Sat, 01 Jan 2013 00:00:00 GMT")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00 gmt")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00 Z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00Z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00 z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00z")
(:values (enc 0 0 0 1 1 2013 0) 0))
(=>? (parse "Sat, 02 Mar 2013 01:23:45 EDT")
(:values (enc 45 23 1 2 3 2013 -4) 0))
(=>? (parse "Sat, 02 Mar 2013 01:23:45 FOOBAZBAR")
(:values (enc 45 23 1 2 3 2013 0) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00 JST")
(:values (enc 0 0 0 1 1 2013 -9) 0))
(=>? (parse "Sat, 01 Feb 2013 01:23:45 JST")
(:values (enc 45 23 1 1 2 2013 -9) 0))
(=>? (parse "01 Dec 13 00:00 JST")
(:values (enc 0 0 0 1 12 2013 -9) 0))
(=>? (parse "24 Dec 49 12:00 EST")
(:values (enc 0 0 12 24 12 2049 -5) 0))
(=>? (parse "24 Dec 50 12:00 EST")
(:values (enc 0 0 12 24 12 1950 -5) 0))
(=>? (parse "Sat, 01 Jan 2000 00:00:00.42 GMT")
(:values (enc 0 0 0 1 1 2000 0) 0.42))
(=>? (parse "Sat, 01 Jan 2000 00:00:00:42 GMT")
(:values (enc 0 0 0 1 1 2000 0) 0.42))
(=>? (parse "Sat, 01 Jan 2013 00:00:00 +0700")
(:values (enc 0 0 0 1 1 2013 -7) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00+1300")
(:values (enc 0 0 0 1 1 2013 -13) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00 +07:00")
(:values (enc 0 0 0 1 1 2013 -7) 0))
(=>? (parse "Sat, 01 Jan 2013 00:00:00+13:00")
(:values (enc 0 0 0 1 1 2013 -13) 0))
(=>? (parse "Thu, 01 Jan 2004")
(:values (enc 0 0 0 1 1 2004 0) 0))
(=>? (parse "01 Jan 2004")
(:values (enc 0 0 0 1 1 2004 0) 0))
(=>? (parse "1 Jan 04")
(:values (enc 0 0 0 1 1 2004 0) 0))
(=>? (parse "Sun Jan 4 16:29:06 PST 2004")
(:values (enc 6 29 16 4 1 2004 -8) 0))
;; iso8601-genus
(=>? (parse "2000-01-01T00:00:00Z")
(:values (enc 0 0 0 1 1 2000 0) 0))
(=>? (parse "2003-12-31T10:14:55.7-08:00")
(:values (enc 55 14 10 31 12 2003 +8) 0.7))
(=>? (parse "2003-12-31T10:14:55.7-0800")
(:values (enc 55 14 10 31 12 2003 +8) 0.7))
(=>? (parse "2003-12-31T10:14:55+08:00")
(:values (enc 55 14 10 31 12 2003 -8) 0))
(=>? (parse "2003-12-31T10:14:55+0800")
(:values (enc 55 14 10 31 12 2003 -8) 0))
(=>? (parse "2003-12-31T10:14:55.7Z")
(:values (enc 55 14 10 31 12 2003 0) 0.7))
(=>? (parse "2003-12-31T10:14:55Z")
(:values (enc 55 14 10 31 12 2003 0) 0))
(=>? (parse "2003-12-31T10:14Z")
(:values (enc 0 14 10 31 12 2003 0) 0))
(=>? (parse "2003-12-31T101455-08:00")
(:values (enc 55 14 10 31 12 2003 +8) 0))
(=>? (parse "2003-12-31T101455-0800")
(:values (enc 55 14 10 31 12 2003 +8) 0))
(=>? (parse "2003-12-31T1014-08:00")
(:values (enc 0 14 10 31 12 2003 +8) 0))
(=>? (parse "2003-12-31T1014-0800")
(:values (enc 0 14 10 31 12 2003 +8) 0))
(=>? (parse "2003-12-31T1014557Z")
(:values (enc 55 14 10 31 12 2003 0) 0.7))
(=>? (parse "2003-12-31T101455Z")
(:values (enc 55 14 10 31 12 2003 0) 0))
(=>? (parse "2003-12-31T1014Z")
(:values (enc 0 14 10 31 12 2003 0) 0))
(=>? (parse "2003-12-31T10Z")
(:values (enc 0 0 10 31 12 2003 0) 0))
(=>? (parse "2003")
(:values (enc 0 0 0 1 1 2003 0) 0))
(=>? (parse "2003-12")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (parse "2003-12-31")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (parse "20031231")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (parse "-03-12")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (parse "-03")
(:values (enc 0 0 0 1 1 2003 0) 0))
(=>? (parse "-0312")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (parse "-03-12-31")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (parse "03-12-31")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (parse "031231")
(:values (enc 0 0 0 31 12 2003 0) 0))
(=>? (parse "2003335")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (parse "2003-335")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (parse "03335")
(:values (enc 0 0 0 1 12 2003 0) 0))
(=>? (parse "03-335")
(:values (enc 0 0 0 1 12 2003 0) 0))
;; c.f. RFC 3339, 3. Two Digit Years, last item
(=>? (parse ":0-09-09")
(:values (enc 0 0 0 9 9 2000 0) 0))
(=>? (parse ";0-09-09")
(:values (enc 0 0 0 9 9 2010 0) 0))
;; supplemental this year
(let ((this-year (nth-value 5 (decode-universal-time
(get-universal-time) 0))))
(=>? (parse "Thu, 01 Jan")
(:values (enc 0 0 0 1 1 this-year 0) 0))
(=>? (parse "01 Jan")
(:values (enc 0 0 0 1 1 this-year 0) 0))
(=>? (parse "1 Jan")
(:values (enc 0 0 0 1 1 this-year 0) 0)))
;; bogus W3CDTF (invalid hour)
(=>? (parse "2003-12-31T25:14:55Z")
(:values (enc 55 14 1 1 1 2004 0) 0))
;; bogus W3CDTF (invalid minute)
(=>? (parse "2003-12-31T10:61:55Z")
(:values (enc 55 1 11 31 12 2003 0) 0))
;; bogus W3CDTF (invalid second)
(=>? (parse "2003-12-31T10:14:61Z")
(:values (enc 1 15 10 31 12 2003 0) 0))
;; MSSQL date time format
(=>? (parse "2004-07-08 23:56:58.7")
(:values (enc 58 56 23 8 7 2004 0) 0.7))
;; MSSQL-ish date time format (without fractional second)
(=>? (parse "2004-07-08 23:56:58")
(:values (enc 58 56 23 8 7 2004 0) 0))
;; above some examples from http://pythonhosted.org/feedparser/date-parsing.html
)
;; Cleanup for Eval-Test
(eval-when (:compile-toplevel :load-toplevel :execute)
(setf *features* *features-tmp*))
;;====================================================================