summaryrefslogtreecommitdiff
path: root/libmailutils/base/parsedate.y
blob: 1fd0000594473ddc23aa8fc09646843c4ad17373 (plain)
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
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
%{
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 2003, 2007-2008, 2010-2012, 2014-2016 Free Software
   Foundation, Inc.

   GNU Mailutils is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
   
   GNU Mailutils is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */
  
/* A heavily modified version of the well-known public domain getdate.y.
   It was originally written by Steven M. Bellovin <smb@research.att.com>
   while at the University of North Carolina at Chapel Hill.  Later tweaked
   by a couple of people on Usenet.  Completely overhauled by Rich $alz
   <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990.
   Rewritten using a proper union by Sergey Poznyakoff <gray@gnu.org> */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdio.h>
#include <ctype.h>

#if HAVE_STDLIB_H
# include <stdlib.h> /* for `free'; used by Bison 1.27 */
#endif

#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
# define IN_CTYPE_DOMAIN(c) 1
#else
# define IN_CTYPE_DOMAIN(c) isascii(c)
#endif

#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
#define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))

/* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
   - Its arg may be any int or unsigned int; it need not be an unsigned char.
   - It's guaranteed to evaluate its argument exactly once.
   - It's typically faster.
   Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
   only '0' through '9' are digits.  Prefer ISDIGIT to ISDIGIT_LOCALE unless
   it's important to use the locale's definition of `digit' even when the
   host does not conform to Posix.  */
#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)

#if defined (STDC_HEADERS) || defined (USG)
# include <string.h>
#endif

/* Some old versions of bison generate parsers that use bcopy.
   That loses on systems that don't provide the function, so we have
   to redefine it here.  */
#if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy)
# define bcopy(from, to, len) memcpy ((to), (from), (len))
#endif

static int yylex ();
static int yyerror ();

#define EPOCH		1970
#define HOUR(x)		((x) * 60)

#define MAX_BUFF_LEN    128   /* size of buffer to read the date into */

/*
**  An entry in the lexical lookup table.
*/
typedef struct _lex_tab {
  const char	*name;
  int		type;
  int		value;
} SYMBOL;


/*
**  Meridian:  am, pm, or 24-hour style.
*/
typedef enum meridian {
  MERam,
  MERpm,
  MER24
} MERIDIAN;

#define PD_MASK_SECOND   00001
#define PD_MASK_MINUTE   00002
#define PD_MASK_HOUR     00004
#define PD_MASK_DAY      00010
#define PD_MASK_MONTH    00020
#define PD_MASK_YEAR     00040
#define PD_MASK_TZ       00100 
#define PD_MASK_MERIDIAN 00200
#define PD_MASK_ORDINAL  00400
#define PD_MASK_NUMBER   01000

#define PD_MASK_TIME PD_MASK_SECOND|PD_MASK_MINUTE|PD_MASK_HOUR
#define PD_MASK_DATE PD_MASK_DAY|PD_MASK_MONTH|PD_MASK_YEAR
#define PD_MASK_DOW PD_MASK_NUMBER
 
#define MASK_IS_SET(f,m) (((f)&(m))==(m))
#define MASK_TEST(f,m)   ((f)&(m)) 
struct pd_date
{
  int mask;
  int day;
  int hour;
  int minute;
  int month;
  int second;
  int year;
  int tz;
  enum meridian meridian;
  int number;
  int ordinal;
};

#define DATE_INIT(date) memset(&(date), 0, sizeof(date))
#define DATE_SET(date, memb, m, val, lim, onerror)                        \
 do                                                                       \
   {                                                                      \
     int __x = val;                                                       \
     if (((m) != PD_MASK_TZ && __x < 0) || (lim && __x > lim)) onerror;   \
     date . memb = __x; date.mask |= m;                                   \
   }                                                                      \
 while (0)
   
#define __SET_SECOND(d,v,a)   DATE_SET(d,second,PD_MASK_SECOND,v,59,a)
#define __SET_MINUTE(d,v,a)   DATE_SET(d,minute,PD_MASK_MINUTE,v,59,a)  
#define __SET_HOUR(d,v,a)     DATE_SET(d,hour,PD_MASK_HOUR,v,23,a)
#define __SET_DAY(d,v,a)      DATE_SET(d,day,PD_MASK_DAY,v,31,a)   
#define __SET_MONTH(d,v,a)    DATE_SET(d,month,PD_MASK_MONTH,v,12,a)
#define __SET_YEAR(d,v,a)     DATE_SET(d,year,PD_MASK_YEAR,v,0,a)  
#define __SET_TZ(d,v,a)       DATE_SET(d,tz,PD_MASK_TZ,v,0,a)
#define __SET_MERIDIAN(d,v,a) DATE_SET(d,meridian,PD_MASK_MERIDIAN,v,MER24,a)
#define __SET_ORDINAL(d,v,a)  DATE_SET(d,ordinal,PD_MASK_ORDINAL,v,0,a)
#define __SET_NUMBER(d,v,a)   DATE_SET(d,number,PD_MASK_NUMBER,v,0,a) 
 
#define SET_SECOND(d,v)   __SET_SECOND(d,v,YYERROR)   
#define SET_MINUTE(d,v)   __SET_MINUTE(d,v,YYERROR)   
#define SET_HOUR(d,v)     __SET_HOUR(d,v,YYERROR)     
#define SET_DAY(d,v)      __SET_DAY(d,v,YYERROR)      
#define SET_MONTH(d,v)    __SET_MONTH(d,v,YYERROR)    
#define SET_YEAR(d,v)     __SET_YEAR(d,v,YYERROR)     
#define SET_TZ(d,v)       __SET_TZ(d,v,YYERROR)       
#define SET_MERIDIAN(d,v) __SET_MERIDIAN(d,v,YYERROR) 
#define SET_ORDINAL(d,v)  __SET_ORDINAL(d,v,YYERROR)  
#define SET_NUMBER(d,v)   __SET_NUMBER(d,v,YYERROR)   

int
pd_date_union (struct pd_date *a, struct pd_date *b)
{
  int diff = (~a->mask) & b->mask;
  if (!diff)
    return 1;

  a->mask |= diff;
  
  if (diff & PD_MASK_SECOND)
    a->second = b->second;
  
  if (diff & PD_MASK_MINUTE)
    a->minute = b->minute;

  if (diff & PD_MASK_HOUR)
    a->hour = b->hour;

  if (diff & PD_MASK_DAY)
    a->day = b->day;

  if (diff & PD_MASK_MONTH)
    a->month = b->month;

  if (diff & PD_MASK_YEAR)
    a->year = b->year;

  if (diff & PD_MASK_TZ)
    a->tz = b->tz;

  if (diff & PD_MASK_MERIDIAN)
    a->meridian = b->meridian;

  if (diff & PD_MASK_ORDINAL)
    a->ordinal = b->ordinal;

  if (diff & PD_MASK_NUMBER)
    a->number = b->number;

  return 0;
}

struct pd_datespec
{
  struct pd_date date;
  struct pd_date rel;
};

static struct pd_datespec pd;
 
static const char	*yyinput;

%}

%union {
  int number;
  enum meridian meridian;
  struct pd_date date;
  struct pd_datespec datespec;
}

/*FIXME: do we need T_ID? */
%token  T_AGO T_DST  T_ID

%token <number> T_DAY T_DAY_UNIT T_DAYZONE T_HOUR_UNIT T_MINUTE_UNIT
%token <number> T_MONTH T_MONTH_UNIT
%token <number>	T_SEC_UNIT T_SNUMBER T_UNUMBER T_YEAR_UNIT T_ZONE
%token <meridian> T_MERIDIAN

%type <meridian> o_merid
%type <date> item time zone date day rel relspec relunit
%type <datespec> spec

%%

input   : spec
          {
	    pd = $1;
	  }
        ;

spec	: /* NULL */
          {
	    DATE_INIT ($$.date);
	    DATE_INIT ($$.rel);
	  }
	| spec item
          {
	    if (pd_date_union (&$1.date, &$2))
	      YYERROR;
	    $$ = $1;
	  }
        | spec rel
          {
	    if (pd_date_union (&$1.rel, &$2))
	      YYERROR;
	    $$ = $1;
	  }
        | spec T_UNUMBER
          {
	    if (MASK_IS_SET ($1.date.mask, (PD_MASK_TIME|PD_MASK_DATE))
		&& !$1.rel.mask)
	      SET_YEAR ($1.date, $2);
	    else
	      {
		if ($2 > 10000)
		  {
		    SET_DAY ($1.date, $2 % 100);
		    SET_MONTH ($1.date, ($2 / 100) %100);
		    SET_YEAR ($1.date, $2 / 10000);
		  }
		else
		  {
		    if ($2 < 100)
		      {
			SET_YEAR ($1.date, $2);
		      }
		    else
		      {
		    	SET_HOUR ($1.date, $2 / 100);
		    	SET_MINUTE ($1.date, $2 % 100);
		      }
		    SET_MERIDIAN ($1.date, MER24);
		  }
	      }
	    $$ = $1;
	  }
	;

item	: time
        | zone
	| date
	| day
	;

time	: T_UNUMBER T_MERIDIAN
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1);
	    SET_MERIDIAN ($$, $2);
	  }
	| T_UNUMBER ':' T_UNUMBER o_merid
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1);
	    SET_MINUTE ($$, $3);
	    SET_MERIDIAN ($$, $4);
	  }
	| T_UNUMBER ':' T_UNUMBER T_SNUMBER
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1);
	    SET_MINUTE ($$, $3);
	    SET_MERIDIAN ($$, MER24);
	    SET_TZ ($$, ($4 < 0
			   ? -$4 % 100 + (-$4 / 100) * 60
			   : - ($4 % 100 + ($4 / 100) * 60)));

	  }
	| T_UNUMBER ':' T_UNUMBER ':' T_UNUMBER o_merid
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1);
	    SET_MINUTE ($$, $3);
	    SET_SECOND ($$, $5);
	    SET_MERIDIAN ($$, $6);
	  }
	| T_UNUMBER ':' T_UNUMBER ':' T_UNUMBER T_SNUMBER
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1);
	    SET_MINUTE ($$, $3);
	    SET_SECOND ($$, $5);
	    SET_MERIDIAN ($$, MER24);
	    SET_TZ ($$, ($6 < 0
			 ? -$6 % 100 + (-$6 / 100) * 60
			 : - ($6 % 100 + ($6 / 100) * 60)));
	  }
	;

zone	: T_ZONE
          {
	    DATE_INIT ($$);
	    SET_TZ ($$, $1);
	  }
	| T_DAYZONE
          {
	    DATE_INIT ($$);
	    SET_TZ ($$, $1 - 60);
	  }
	| T_ZONE T_DST
          {
	    DATE_INIT ($$);
	    SET_TZ ($$, $1 - 60);
	  }
	;

day	: T_DAY
          {
	    DATE_INIT ($$);
	    SET_ORDINAL ($$, 1);
	    SET_NUMBER ($$, $1);
	  }
	| T_DAY ','
          {
	    DATE_INIT ($$);
	    SET_ORDINAL ($$, 1);
	    SET_NUMBER ($$, $1);
	  }
	| T_UNUMBER T_DAY
          {
	    DATE_INIT ($$);
	    SET_ORDINAL ($$, $1);
	    SET_NUMBER ($$, $2);
	  }
	;

date	: T_UNUMBER '/' T_UNUMBER
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $1);
	    SET_DAY ($$, $3);
	  }
	| T_UNUMBER '/' T_UNUMBER '/' T_UNUMBER
          {
	    DATE_INIT ($$);
	    /* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY.
	       The goal in recognizing YYYY/MM/DD is solely to support legacy
	       machine-generated dates like those in an RCS log listing.  If
	       you want portability, use the ISO 8601 format.  */
	    if ($1 >= 1000)
	      {
		SET_YEAR ($$, $1);
		SET_MONTH ($$, $3);
		SET_DAY ($$, $5);
	      }
	    else
	      {
		SET_MONTH ($$, $1);
		SET_DAY ($$, $3);
		SET_YEAR ($$, $5);
	      }
	  }
	| T_UNUMBER T_SNUMBER T_SNUMBER
          {
	    DATE_INIT ($$);
	    /* ISO 8601 format.  yyyy-mm-dd.  */
	    SET_YEAR ($$, $1);
	    SET_MONTH ($$, -$2);
	    SET_DAY ($$, -$3);
	  }
	| T_UNUMBER T_MONTH T_SNUMBER
          {
	    /* either 17-JUN-1992 or 1992-JUN-17 */
	    DATE_INIT ($$);
	    if ($1 < 32)
	      {
		SET_DAY ($$, $1);
		SET_MONTH ($$, $2);
		SET_YEAR ($$, -$3);
	      }
	    else
	      {
		SET_DAY ($$, -$3);
		SET_MONTH ($$, $2);
		SET_YEAR ($$, $1);
	      }
	  }
	| T_MONTH T_UNUMBER
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $1);
	    SET_DAY ($$, $2);
	  }
	| T_MONTH T_UNUMBER ',' T_UNUMBER
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $1);
	    SET_DAY ($$, $2);
	    SET_YEAR ($$, $4);
	  }
	| T_UNUMBER T_MONTH
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $2);
	    SET_DAY ($$, $1);
	  }
	| T_UNUMBER T_MONTH T_UNUMBER
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $2);
	    SET_DAY ($$, $1);
	    SET_YEAR ($$, $3);
	  }
        | T_DAY T_MONTH T_UNUMBER time T_UNUMBER
          {
	    DATE_INIT ($$);

	    SET_ORDINAL ($$, 1);
	    SET_NUMBER ($$, $1);

	    SET_MONTH ($$, $2);
	    SET_DAY ($$, $3);
	    SET_YEAR ($$, $5);
	    if (pd_date_union (&$$, &$4))
	      YYERROR;
	  }
	;

rel	: relspec T_AGO
          {
	    $1.second = - $1.second;
	    $1.minute = - $1.minute;
	    $1.hour = - $1.hour;
	    $1.day = - $1.day;
	    $1.month = - $1.month;
	    $1.year = - $1.year;
	    $$ = $1;
	  }
	| relspec
	;


relspec : relunit
          {
	    DATE_INIT ($$);
	    if (pd_date_union (&$$, &$1))
	      YYERROR;
	  }
        | relspec relunit
          {
	    if (pd_date_union (&$1, &$2))
	      YYERROR;
	    $$ = $1;
	  }
        ;

relunit	: T_UNUMBER T_YEAR_UNIT
          {
	    DATE_INIT ($$);
	    SET_YEAR ($$, $1 * $2);
	  }
	| T_SNUMBER T_YEAR_UNIT
          {
	    DATE_INIT ($$);
	    SET_YEAR ($$, $1 * $2);
	  }
	| T_YEAR_UNIT
          {
	    DATE_INIT ($$);
	    SET_YEAR ($$, $1);
	  }
	| T_UNUMBER T_MONTH_UNIT
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $1 * $2);
	  }
	| T_SNUMBER T_MONTH_UNIT
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $1 * $2);
	  }
	| T_MONTH_UNIT
          {
	    DATE_INIT ($$);
	    SET_MONTH ($$, $1);
	  }
	| T_UNUMBER T_DAY_UNIT
          {
	    DATE_INIT ($$);
	    SET_DAY ($$, $1 * $2);
	  }
	| T_SNUMBER T_DAY_UNIT
          {
	    DATE_INIT ($$);
	    SET_DAY ($$, $1 * $2);
	  }
	| T_DAY_UNIT
          {
	    DATE_INIT ($$);
	    SET_DAY ($$, $1);
	  }
	| T_UNUMBER T_HOUR_UNIT
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1 * $2);
	  }
	| T_SNUMBER T_HOUR_UNIT
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1 * $2);
	  }
	| T_HOUR_UNIT
          {
	    DATE_INIT ($$);
	    SET_HOUR ($$, $1);
	  }
	| T_UNUMBER T_MINUTE_UNIT
          {
	    DATE_INIT ($$);
	    SET_MINUTE ($$, $1 * $2);
	  }
	| T_SNUMBER T_MINUTE_UNIT
          {
	    DATE_INIT ($$);
	    SET_MINUTE ($$, $1 * $2);
	  }
	| T_MINUTE_UNIT
          {
	    DATE_INIT ($$);
	    SET_MINUTE ($$, $1);
	  }
	| T_UNUMBER T_SEC_UNIT
          {
	    DATE_INIT ($$);
	    SET_SECOND ($$, $1 * $2);
	  }
	| T_SNUMBER T_SEC_UNIT
          {
	    DATE_INIT ($$);
	    SET_SECOND ($$, $1 * $2);
	  }
	| T_SEC_UNIT
          {
	    DATE_INIT ($$);
	    SET_SECOND ($$, $1);
	  }
	;

o_merid	: /* empty */
          {
	    $$ = MER24;
	  }
	| T_MERIDIAN
	  {
	    $$ = $1;
	  }
	;

%%

#include <mailutils/types.h>

#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

#include <mailutils/util.h>

/* Month and day table. */
static SYMBOL const month_day_tab[] = {
  { "january",	T_MONTH,  1 },
  { "february",	T_MONTH,  2 },
  { "march",	T_MONTH,  3 },
  { "april",	T_MONTH,  4 },
  { "may",	T_MONTH,  5 },
  { "june",	T_MONTH,  6 },
  { "july",	T_MONTH,  7 },
  { "august",	T_MONTH,  8 },
  { "september",T_MONTH,  9 },
  { "sept",	T_MONTH,  9 },
  { "october",	T_MONTH, 10 },
  { "november",	T_MONTH, 11 },
  { "december",	T_MONTH, 12 },
  { "sunday",	T_DAY,   0 },
  { "monday",	T_DAY,   1 },
  { "tuesday",	T_DAY,   2 },
  { "tues",	T_DAY,   2 },
  { "wednesday",T_DAY,   3 },
  { "wednes",	T_DAY,   3 },
  { "thursday",	T_DAY,   4 },
  { "thur",	T_DAY,   4 },
  { "thurs",	T_DAY,   4 },
  { "friday",	T_DAY,   5 },
  { "saturday",	T_DAY,   6 },
  { NULL, 0, 0 }
};

/* Time units table. */
static SYMBOL const units_tab[] = {
  { "year",	T_YEAR_UNIT,	1 },
  { "month",	T_MONTH_UNIT,	1 },
  { "fortnight",T_DAY_UNIT,	14 },
  { "week",	T_DAY_UNIT,	7 },
  { "day",	T_DAY_UNIT,	1 },
  { "hour",	T_HOUR_UNIT,	1 },
  { "minute",	T_MINUTE_UNIT,	1 },
  { "min",	T_MINUTE_UNIT,	1 },
  { "second",	T_SEC_UNIT,	1 },
  { "sec",	T_SEC_UNIT,	1 },
  { NULL, 0, 0 }
};

/* Assorted relative-time words. */
static SYMBOL const other_tab[] = {
  { "tomorrow",	T_MINUTE_UNIT,	1 * 24 * 60 },
  { "yesterday",T_MINUTE_UNIT,	-1 * 24 * 60 },
  { "today",	T_MINUTE_UNIT,	0 },
  { "now",	T_MINUTE_UNIT,	0 },
  { "last",	T_UNUMBER,	-1 },
  { "this",	T_MINUTE_UNIT,	0 },
  { "next",	T_UNUMBER,	1 },
  { "first",	T_UNUMBER,	1 },
/*  { "second",	T_UNUMBER,	2 }, */
  { "third",	T_UNUMBER,	3 },
  { "fourth",	T_UNUMBER,	4 },
  { "fifth",	T_UNUMBER,	5 },
  { "sixth",	T_UNUMBER,	6 },
  { "seventh",	T_UNUMBER,	7 },
  { "eighth",	T_UNUMBER,	8 },
  { "ninth",	T_UNUMBER,	9 },
  { "tenth",	T_UNUMBER,	10 },
  { "eleventh",	T_UNUMBER,	11 },
  { "twelfth",	T_UNUMBER,	12 },
  { "ago",	T_AGO,	        1 },
  { NULL, 0, 0 }
};

/* The timezone table. */
static SYMBOL const tz_tab[] = {
  { "gmt",	T_ZONE,     HOUR ( 0) },	/* Greenwich Mean */
  { "ut",	T_ZONE,     HOUR ( 0) },	/* Universal (Coordinated) */
  { "utc",	T_ZONE,     HOUR ( 0) },
  { "wet",	T_ZONE,     HOUR ( 0) },	/* Western European */
  { "bst",	T_DAYZONE,  HOUR ( 0) },	/* British Summer */
  { "wat",	T_ZONE,     HOUR ( 1) },	/* West Africa */
  { "at",	T_ZONE,     HOUR ( 2) },	/* Azores */
#if	0
  /* For completeness.  BST is also British Summer, and GST is
   * also Guam Standard. */
  { "bst",	T_ZONE,     HOUR ( 3) },	/* Brazil Standard */
  { "gst",	T_ZONE,     HOUR ( 3) },	/* Greenland Standard */
#endif
#if 0
  { "nft",	T_ZONE,     HOUR (3.5) },	/* Newfoundland */
  { "nst",	T_ZONE,     HOUR (3.5) },	/* Newfoundland Standard */
  { "ndt",	T_DAYZONE,  HOUR (3.5) },	/* Newfoundland Daylight */
#endif
  { "ast",	T_ZONE,     HOUR ( 4) },	/* Atlantic Standard */
  { "adt",	T_DAYZONE,  HOUR ( 4) },	/* Atlantic Daylight */
  { "est",	T_ZONE,     HOUR ( 5) },	/* Eastern Standard */
  { "edt",	T_DAYZONE,  HOUR ( 5) },	/* Eastern Daylight */
  { "cst",	T_ZONE,     HOUR ( 6) },	/* Central Standard */
  { "cdt",	T_DAYZONE,  HOUR ( 6) },	/* Central Daylight */
  { "mst",	T_ZONE,     HOUR ( 7) },	/* Mountain Standard */
  { "mdt",	T_DAYZONE,  HOUR ( 7) },	/* Mountain Daylight */
  { "pst",	T_ZONE,     HOUR ( 8) },	/* Pacific Standard */
  { "pdt",	T_DAYZONE,  HOUR ( 8) },	/* Pacific Daylight */
  { "yst",	T_ZONE,     HOUR ( 9) },	/* Yukon Standard */
  { "ydt",	T_DAYZONE,  HOUR ( 9) },	/* Yukon Daylight */
  { "hst",	T_ZONE,     HOUR (10) },	/* Hawaii Standard */
  { "hdt",	T_DAYZONE,  HOUR (10) },	/* Hawaii Daylight */
  { "cat",	T_ZONE,     HOUR (10) },	/* Central Alaska */
  { "ahst",	T_ZONE,     HOUR (10) },	/* Alaska-Hawaii Standard */
  { "nt",	T_ZONE,     HOUR (11) },	/* Nome */
  { "idlw",	T_ZONE,     HOUR (12) },	/* International Date Line West */
  { "cet",	T_ZONE,     -HOUR (1) },	/* Central European */
  { "met",	T_ZONE,     -HOUR (1) },	/* Middle European */
  { "mewt",	T_ZONE,     -HOUR (1) },	/* Middle European Winter */
  { "mest",	T_DAYZONE,  -HOUR (1) },	/* Middle European Summer */
  { "mesz",	T_DAYZONE,  -HOUR (1) },	/* Middle European Summer */
  { "swt",	T_ZONE,     -HOUR (1) },	/* Swedish Winter */
  { "sst",	T_DAYZONE,  -HOUR (1) },	/* Swedish Summer */
  { "fwt",	T_ZONE,     -HOUR (1) },	/* French Winter */
  { "fst",	T_DAYZONE,  -HOUR (1) },	/* French Summer */
  { "eet",	T_ZONE,     -HOUR (2) },	/* Eastern Europe, USSR Zone 1 */
  { "bt",	T_ZONE,     -HOUR (3) },	/* Baghdad, USSR Zone 2 */
#if 0
  { "it",	T_ZONE,     -HOUR (3.5) },/* Iran */
#endif
  { "zp4",	T_ZONE,     -HOUR (4) },	/* USSR Zone 3 */
  { "zp5",	T_ZONE,     -HOUR (5) },	/* USSR Zone 4 */
#if 0
  { "ist",	T_ZONE,     -HOUR (5.5) },/* Indian Standard */
#endif
  { "zp6",	T_ZONE,     -HOUR (6) },	/* USSR Zone 5 */
#if	0
  /* For completeness.  NST is also Newfoundland Standard, and SST is
   * also Swedish Summer. */
  { "nst",	T_ZONE,     -HOUR (6.5) },/* North Sumatra */
  { "sst",	T_ZONE,     -HOUR (7) },	/* South Sumatra, USSR Zone 6 */
#endif	/* 0 */
  { "wast",	T_ZONE,     -HOUR (7) },	/* West Australian Standard */
  { "wadt",	T_DAYZONE,  -HOUR (7) },	/* West Australian Daylight */
#if 0
  { "jt",	T_ZONE,     -HOUR (7.5) },/* Java (3pm in Cronusland!) */
#endif
  { "cct",	T_ZONE,     -HOUR (8) },	/* China Coast, USSR Zone 7 */
  { "jst",	T_ZONE,     -HOUR (9) },	/* Japan Standard, USSR Zone 8 */
#if 0
  { "cast",	T_ZONE,     -HOUR (9.5) },/* Central Australian Standard */
  { "cadt",	T_DAYZONE,  -HOUR (9.5) },/* Central Australian Daylight */
#endif
  { "east",	T_ZONE,     -HOUR (10) },	/* Eastern Australian Standard */
  { "eadt",	T_DAYZONE,  -HOUR (10) },	/* Eastern Australian Daylight */
  { "gst",	T_ZONE,     -HOUR (10) },	/* Guam Standard, USSR Zone 9 */
  { "nzt",	T_ZONE,     -HOUR (12) },	/* New Zealand */
  { "nzst",	T_ZONE,     -HOUR (12) },	/* New Zealand Standard */
  { "nzdt",	T_DAYZONE,  -HOUR (12) },	/* New Zealand Daylight */
  { "idle",	T_ZONE,     -HOUR (12) },	/* International Date Line