aboutsummaryrefslogtreecommitdiffstats
path: root/util/datetime/parser.rl6
blob: 931f09eae116b638d65d2dcec9a4cabcf2371afb (plain) (blame)
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
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cctype>
#include <ctime>
#include <numeric>

#include <util/datetime/parser.h>
#include <util/generic/ymath.h>


%%{

machine DateTimeParserCommon;

sp  = ' ';

action clear_int {
    I = 0;
    Dc = 0;
}

action update_int {
    I = I * 10 + (fc - '0');
    ++Dc;
}

int = (digit+)
    >clear_int
    $update_int;

int1 = digit
    >clear_int
    $update_int;

int2 = (digit digit)
    >clear_int
    $update_int;

int3 = (digit digit digit)
    >clear_int
    $update_int;

int4 = (digit digit digit digit)
    >clear_int
    $update_int;

int12 = (digit digit?)
    >clear_int
    $update_int;

int24 = ( digit digit ( digit digit )? )
    >clear_int
    $update_int;

# According to both RFC2822 and RFC2616 dates MUST be case-sensitive,
# but Andrey fomichev@ wants relaxed parser

month3 =
      'Jan'i %{ DateTimeFields.Month =  1; }
    | 'Feb'i %{ DateTimeFields.Month =  2; }
    | 'Mar'i %{ DateTimeFields.Month =  3; }
    | 'Apr'i %{ DateTimeFields.Month =  4; }
    | 'May'i %{ DateTimeFields.Month =  5; }
    | 'Jun'i %{ DateTimeFields.Month =  6; }
    | 'Jul'i %{ DateTimeFields.Month =  7; }
    | 'Aug'i %{ DateTimeFields.Month =  8; }
    | 'Sep'i %{ DateTimeFields.Month =  9; }
    | 'Oct'i %{ DateTimeFields.Month = 10; }
    | 'Nov'i %{ DateTimeFields.Month = 11; }
    | 'Dec'i %{ DateTimeFields.Month = 12; };

wkday   = 'Mon'i | 'Tue'i | 'Wed'i | 'Thu'i | 'Fri'i | 'Sat'i | 'Sun'i;
weekday = 'Monday'i | 'Tuesday'i | 'Wednesday'i | 'Thursday'i
        | 'Friday'i | 'Saturday'i | 'Sunday'i;

action set_second   { DateTimeFields.Second = I; }
action set_minute   { DateTimeFields.Minute = I; }
action set_hour     { DateTimeFields.Hour = I; }
action set_day      { DateTimeFields.Day = I; }
action set_month    { DateTimeFields.Month = I; }
action set_year     { DateTimeFields.SetLooseYear(I); }
action set_zone_utc { DateTimeFields.ZoneOffsetMinutes = 0; }

}%%

%%{

machine RFC822DateParser;

################# RFC 2822 3.3 Full Date ###################

include DateTimeParserCommon;

ws1 = (space+);
ws0 = (space*);
dow_spec = ( wkday ',' )?;

day  = int12 %set_day;
year = int24 %set_year;

# actually it must be from 0 to 23
hour = int2 %set_hour;

# actually it must be from 0 to 59
min  = int2 %set_minute;

# actually it must be from 0 to 59
sec  = int2 %set_second;

sec_spec  = ( ':' . sec )?;

# so called "military zone offset". I hardly believe someone uses it now, but we MUST respect RFc822
action set_mil_offset {
    char c = (char)toupper(fc);
    if (c == 'Z')
        DateTimeFields.ZoneOffsetMinutes = 0;
    else {
        if (c <= 'M') {
            // ['A'..'M'] \ 'J'
            if (c < 'J')
                DateTimeFields.ZoneOffsetMinutes = (i32)TDuration::Hours(c - 'A' + 1).Minutes();
            else
                DateTimeFields.ZoneOffsetMinutes = (i32)TDuration::Hours(c - 'A').Minutes();
        } else {
            // ['N'..'Y']
            DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(c - 'N' + 1).Minutes();
        }
    }
}

action set_digit_offset {
    DateTimeFields.ZoneOffsetMinutes = Sign * (i32)(TDuration::Hours(I / 100) + TDuration::Minutes(I % 100)).Minutes();
}

mil_zone = /[A-IK-Za-ik-z]/ $set_mil_offset;

# actions % were replaced with @ (when the script was migrated to ragel 5.24)
# because ragel 5.24 does not call to the % action if it  be called at the very end of string.
# it is a bug in ragel 5 because ragel 6.2 works correctly with % at the end of string.
# see http://www.complang.org/ragel/ChangeLog.

zone = 'UT' @{ DateTimeFields.ZoneOffsetMinutes = 0; }
    | 'GMT' @{ DateTimeFields.ZoneOffsetMinutes = 0; }
    | 'EST' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(5).Minutes();}
    | 'EDT' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(4).Minutes(); }
    | 'CST' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(6).Minutes();}
    | 'CDT' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(5).Minutes(); }
    | 'MST' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(7).Minutes();}
    | 'MDT' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(6).Minutes(); }
    | 'PST' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(8).Minutes();}
    | 'PDT' @{ DateTimeFields.ZoneOffsetMinutes = -(i32)TDuration::Hours(7).Minutes(); };

digit_offset = ('+' | '-') > { Sign = fc == '+' ? 1 : -1; } . int4 @set_digit_offset;

offset = ( zone | mil_zone | digit_offset );

rfc822datetime = ws0 . dow_spec . ws0 . day . ws1 . month3 . ws1 . year . ws1 . hour . ':' . min . sec_spec . ws1 . offset . ws0;

main := rfc822datetime;

write data noerror;

}%%

TRfc822DateTimeParserDeprecated::TRfc822DateTimeParserDeprecated() {
    %% write init;
}

bool TRfc822DateTimeParserDeprecated::ParsePart(const char* input, size_t len) {
    const char* p = input;
    const char* pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

TRfc822DateTimeParser::TRfc822DateTimeParser() {
    %% write init;
}

bool TRfc822DateTimeParser::ParsePart(const char* input, size_t len) {
    const char* p = input;
    const char* pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

%%{

machine ISO8601DateTimeParser;

include DateTimeParserCommon;

year = int4 @set_year;
month = int2 @set_month;
day = int2 @set_day;
hour = int2 @set_hour;
minute = int2 @set_minute;
second = int2 @set_second;
secondFrac = digit {1,6} >clear_int $update_int @{
    ui32 us = I;
    for (int k = Dc; k < 6; ++k) {
        us *= 10;
    }
    DateTimeFields.MicroSecond = us;
};
secondFracTail = (digit*);

zoneZ = [Zz] @set_zone_utc;
zoneOffset = space? . ('+' | '-') >{ Sign = fc == '+' ? 1 : -1; } . int2 @{ DateTimeFields.ZoneOffsetMinutes = Sign * (i32)TDuration::Hours(I).Minutes(); } . (':')? . (int2 @{ DateTimeFields.ZoneOffsetMinutes += I * Sign; })?;
zone = zoneZ | zoneOffset;

iso8601date = (year . '-' . month . '-' . day) | (year . month . day);
iso8601time = (hour . ':' . minute . (':' . second ('.' secondFrac secondFracTail)?)?) | (hour . minute . second?);

iso8601datetime = iso8601date . ([Tt ] . iso8601time . zone?)?;

main := iso8601datetime;

write data noerror;

}%%

TIso8601DateTimeParserDeprecated::TIso8601DateTimeParserDeprecated() {
    %% write init;
}

bool TIso8601DateTimeParserDeprecated::ParsePart(const char* input, size_t len) {
    const char* p = input;
    const char* pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

TIso8601DateTimeParser::TIso8601DateTimeParser() {
    %% write init;
}

bool TIso8601DateTimeParser::ParsePart(const char* input, size_t len) {
    const char* p = input;
    const char* pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

%%{

machine HttpDateTimeParser;

include DateTimeParserCommon;

################# RFC 2616 3.3.1 Full Date #################

time            = int2 %set_hour ':' int2 %set_minute ':' int2 %set_second;
date1           = int2 %set_day ' ' month3 ' ' int4 %set_year;
date2           = int2 %set_day '-' month3 '-' int2 %set_year;
date3           = month3 sp (int2 | sp int1) %set_day;

rfc1123_date    = wkday ',' sp date1 sp time sp 'GMT'i;
rfc850_date     = weekday ',' sp date2 sp time sp 'GMT'i;
asctime_date    = wkday sp date3 sp time sp int4 @set_year;
http_date       = (rfc1123_date | rfc850_date | asctime_date) @set_zone_utc;

}%%

%%{

machine HttpDateTimeParserStandalone;

include HttpDateTimeParser;

main := http_date;

write data noerror;

}%%

THttpDateTimeParserDeprecated::THttpDateTimeParserDeprecated() {
    %% write init;
}

bool THttpDateTimeParserDeprecated::ParsePart(const char* input, size_t len) {
    const char* p = input;
    const char* pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

THttpDateTimeParser::THttpDateTimeParser() {
    %% write init;
}

bool THttpDateTimeParser::ParsePart(const char* input, size_t len) {
    const char* p = input;
    const char* pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

%%{

machine X509ValidityDateTimeParser;

include DateTimeParserCommon;

################# X.509 certificate validity time (see rfc5280 4.1.2.5.*) #################

year = int2 @{ DateTimeFields.Year = (I < 50 ? I + 2000 : I + 1900); };
month = int2 @set_month;
day = int2 @set_day;
hour = int2 @set_hour;
minute = int2 @set_minute;
second = int2 @set_second;
zone = 'Z' @set_zone_utc;

main := year . month . day . hour . minute . second . zone;

write data noerror;

}%%

TX509ValidityDateTimeParserDeprecated::TX509ValidityDateTimeParserDeprecated() {
    %% write init;
}

bool TX509ValidityDateTimeParserDeprecated::ParsePart(const char *input, size_t len) {
    const char *p = input;
    const char *pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

TX509ValidityDateTimeParser::TX509ValidityDateTimeParser() {
    %% write init;
}

bool TX509ValidityDateTimeParser::ParsePart(const char *input, size_t len) {
    const char *p = input;
    const char *pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

%%{

machine X509Validity4yDateTimeParser;

include DateTimeParserCommon;

year = int4 @{ DateTimeFields.Year = I; };
month = int2 @set_month;
day = int2 @set_day;
hour = int2 @set_hour;
minute = int2 @set_minute;
second = int2 @set_second;
zone = 'Z' @set_zone_utc;


main := year . month . day . hour . minute . second . zone;

write data noerror;

}%%

TX509Validity4yDateTimeParserDeprecated::TX509Validity4yDateTimeParserDeprecated() {
    %% write init;
}

bool TX509Validity4yDateTimeParserDeprecated::ParsePart(const char *input, size_t len) {
    const char *p = input;
    const char *pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

TX509Validity4yDateTimeParser::TX509Validity4yDateTimeParser() {
    %% write init;
}

bool TX509Validity4yDateTimeParser::ParsePart(const char *input, size_t len) {
    const char *p = input;
    const char *pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

TInstant TIso8601DateTimeParserDeprecated::GetResult(TInstant defaultValue) const {
    Y_UNUSED(ISO8601DateTimeParser_en_main);
    return TDateTimeParserBaseDeprecated::GetResult(ISO8601DateTimeParser_first_final, defaultValue);
}

TInstant TRfc822DateTimeParserDeprecated::GetResult(TInstant defaultValue) const {
    Y_UNUSED(RFC822DateParser_en_main);
    return TDateTimeParserBaseDeprecated::GetResult(RFC822DateParser_first_final, defaultValue);
}

TInstant THttpDateTimeParserDeprecated::GetResult(TInstant defaultValue) const {
    Y_UNUSED(HttpDateTimeParserStandalone_en_main);
    return TDateTimeParserBaseDeprecated::GetResult(HttpDateTimeParserStandalone_first_final, defaultValue);
}

TInstant TX509ValidityDateTimeParserDeprecated::GetResult(TInstant defaultValue) const {
    Y_UNUSED(X509ValidityDateTimeParser_en_main);
    return TDateTimeParserBaseDeprecated::GetResult(X509ValidityDateTimeParser_first_final, defaultValue);
}

TInstant TX509Validity4yDateTimeParserDeprecated::GetResult(TInstant defaultValue) const {
    Y_UNUSED(X509Validity4yDateTimeParser_en_main);
    return TDateTimeParserBaseDeprecated::GetResult(X509Validity4yDateTimeParser_first_final, defaultValue);
}

TInstant TIso8601DateTimeParser::GetResult(TInstant defaultValue) const {
    Y_UNUSED(ISO8601DateTimeParser_en_main);
    return TDateTimeParserBase::GetResult(ISO8601DateTimeParser_first_final, defaultValue);
}

TInstant TRfc822DateTimeParser::GetResult(TInstant defaultValue) const {
    Y_UNUSED(RFC822DateParser_en_main);
    return TDateTimeParserBase::GetResult(RFC822DateParser_first_final, defaultValue);
}

TInstant THttpDateTimeParser::GetResult(TInstant defaultValue) const {
    Y_UNUSED(HttpDateTimeParserStandalone_en_main);
    return TDateTimeParserBase::GetResult(HttpDateTimeParserStandalone_first_final, defaultValue);
}

TInstant TX509ValidityDateTimeParser::GetResult(TInstant defaultValue) const {
    Y_UNUSED(X509ValidityDateTimeParser_en_main);
    return TDateTimeParserBase::GetResult(X509ValidityDateTimeParser_first_final, defaultValue);
}

TInstant TX509Validity4yDateTimeParser::GetResult(TInstant defaultValue) const {
    Y_UNUSED(X509Validity4yDateTimeParser_en_main);
    return TDateTimeParserBase::GetResult(X509Validity4yDateTimeParser_first_final, defaultValue);
}

template<class TParser, class TResult>
static inline TResult Parse(const char* input, size_t len, TResult defaultValue) {
    TParser parser;
    if (!parser.ParsePart(input, len))
        return defaultValue;
    return parser.GetResult(defaultValue);
}

template<class TParser, class TResult, bool ThrowExceptionOnFailure = true>
static inline TResult ParseUnsafe(const char* input, size_t len) {
    TResult r = Parse<TParser, TResult>(input, len, TResult::Max());
    if (ThrowExceptionOnFailure && r == TResult::Max())
        ythrow TDateTimeParseException() << "error in datetime parsing. Input data: " << TStringBuf(input, len);
    return r;
}

TInstant TInstant::ParseIso8601Deprecated(const TStringBuf input) {
    return ParseUnsafe<TIso8601DateTimeParserDeprecated, TInstant>(input.data(), input.size());
}

TInstant TInstant::ParseRfc822Deprecated(const TStringBuf input) {
    return ParseUnsafe<TRfc822DateTimeParserDeprecated, TInstant>(input.data(), input.size());
}

TInstant TInstant::ParseHttpDeprecated(const TStringBuf input) {
    return ParseUnsafe<THttpDateTimeParserDeprecated, TInstant>(input.data(), input.size());
}

TInstant TInstant::ParseX509ValidityDeprecated(const TStringBuf input) {
    switch (input.size()) {
    case 13:
        return ParseUnsafe<TX509ValidityDateTimeParserDeprecated, TInstant>(input.data(), 13);
    case 15:
        return ParseUnsafe<TX509Validity4yDateTimeParserDeprecated, TInstant>(input.data(), 15);
    default:
        ythrow TDateTimeParseException();
    }
}

bool TInstant::TryParseIso8601Deprecated(const TStringBuf input, TInstant& instant) {
    const auto parsed = ParseUnsafe<TIso8601DateTimeParserDeprecated, TInstant, false>(input.data(), input.size());
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

bool TInstant::TryParseRfc822Deprecated(const TStringBuf input, TInstant& instant) {
    const auto parsed = ParseUnsafe<TRfc822DateTimeParserDeprecated, TInstant, false>(input.data(), input.size());
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

bool TInstant::TryParseHttpDeprecated(const TStringBuf input, TInstant& instant) {
    const auto parsed = ParseUnsafe<THttpDateTimeParserDeprecated, TInstant, false>(input.data(), input.size());
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

bool TInstant::TryParseX509Deprecated(const TStringBuf input, TInstant& instant) {
    TInstant parsed;
    switch (input.size()) {
        case 13:
            parsed = ParseUnsafe<TX509ValidityDateTimeParserDeprecated, TInstant, false>(input.data(), 13);
            break;
        case 15:
            parsed = ParseUnsafe<TX509Validity4yDateTimeParserDeprecated, TInstant, false>(input.data(), 15);
            break;
        default:
            return false;
    }
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

TInstant TInstant::ParseIso8601(const TStringBuf input) {
    return ParseUnsafe<TIso8601DateTimeParser, TInstant>(input.data(), input.size());
}

TInstant TInstant::ParseRfc822(const TStringBuf input) {
    return ParseUnsafe<TRfc822DateTimeParser, TInstant>(input.data(), input.size());
}

TInstant TInstant::ParseHttp(const TStringBuf input) {
    return ParseUnsafe<THttpDateTimeParser, TInstant>(input.data(), input.size());
}

TInstant TInstant::ParseX509Validity(const TStringBuf input) {
    switch (input.size()) {
    case 13:
        return ParseUnsafe<TX509ValidityDateTimeParser, TInstant>(input.data(), 13);
    case 15:
        return ParseUnsafe<TX509Validity4yDateTimeParser, TInstant>(input.data(), 15);
    default:
        ythrow TDateTimeParseException();
    }
}

bool TInstant::TryParseIso8601(const TStringBuf input, TInstant& instant) {
    const auto parsed = ParseUnsafe<TIso8601DateTimeParser, TInstant, false>(input.data(), input.size());
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

bool TInstant::TryParseRfc822(const TStringBuf input, TInstant& instant) {
    const auto parsed = ParseUnsafe<TRfc822DateTimeParser, TInstant, false>(input.data(), input.size());
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

bool TInstant::TryParseHttp(const TStringBuf input, TInstant& instant) {
    const auto parsed = ParseUnsafe<THttpDateTimeParser, TInstant, false>(input.data(), input.size());
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

bool TInstant::TryParseX509(const TStringBuf input, TInstant& instant) {
    TInstant parsed;
    switch (input.size()) {
        case 13:
            parsed = ParseUnsafe<TX509ValidityDateTimeParser, TInstant, false>(input.data(), 13);
            break;
        case 15:
            parsed = ParseUnsafe<TX509Validity4yDateTimeParser, TInstant, false>(input.data(), 15);
            break;
        default:
            return false;
    }
    if (TInstant::Max() == parsed) {
        return false;
    }
    instant = parsed;
    return true;
}

bool ParseRFC822DateTimeDeprecated(const char* input, time_t& utcTime) {
    return ParseRFC822DateTimeDeprecated(input, strlen(input), utcTime);
}

bool ParseISO8601DateTimeDeprecated(const char* input, time_t& utcTime) {
    return ParseISO8601DateTimeDeprecated(input, strlen(input), utcTime);
}

bool ParseHTTPDateTimeDeprecated(const char* input, time_t& utcTime) {
    return ParseHTTPDateTimeDeprecated(input, strlen(input), utcTime);
}

bool ParseX509ValidityDateTimeDeprecated(const char* input, time_t& utcTime) {
    return ParseX509ValidityDateTimeDeprecated(input, strlen(input), utcTime);
}

bool ParseRFC822DateTimeDeprecated(const char* input, size_t inputLen, time_t& utcTime) {
    try {
        utcTime = ParseUnsafe<TRfc822DateTimeParserDeprecated, TInstant>(input, inputLen).TimeT();
        return true;
    } catch (const TDateTimeParseException&) {
        return false;
    }
}

bool ParseISO8601DateTimeDeprecated(const char* input, size_t inputLen, time_t& utcTime) {
    try {
        utcTime = ParseUnsafe<TIso8601DateTimeParserDeprecated, TInstant>(input, inputLen).TimeT();
        return true;
    } catch (const TDateTimeParseException&) {
        return false;
    }
}

bool ParseHTTPDateTimeDeprecated(const char* input, size_t inputLen, time_t& utcTime) {
    try {
        utcTime = ParseUnsafe<THttpDateTimeParserDeprecated, TInstant>(input, inputLen).TimeT();
        return true;
    } catch (const TDateTimeParseException&) {
        return false;
    }
}

bool ParseX509ValidityDateTimeDeprecated(const char* input, size_t inputLen, time_t& utcTime) {
    TInstant r;
    switch (inputLen) {
    case 13:
        r = Parse<TX509ValidityDateTimeParserDeprecated, TInstant>(input, 13, TInstant::Max());
        break;
    case 15:
        r = Parse<TX509Validity4yDateTimeParserDeprecated, TInstant>(input, 15, TInstant::Max());
        break;
    default:
        return false;
    }
    if (r == TInstant::Max())
        return false;
    utcTime = r.TimeT();
    return true;
}

bool ParseRFC822DateTime(const char* input, time_t& utcTime) {
    return ParseRFC822DateTime(input, strlen(input), utcTime);
}

bool ParseISO8601DateTime(const char* input, time_t& utcTime) {
    return ParseISO8601DateTime(input, strlen(input), utcTime);
}

bool ParseHTTPDateTime(const char* input, time_t& utcTime) {
    return ParseHTTPDateTime(input, strlen(input), utcTime);
}

bool ParseX509ValidityDateTime(const char* input, time_t& utcTime) {
    return ParseX509ValidityDateTime(input, strlen(input), utcTime);
}

bool ParseRFC822DateTime(const char* input, size_t inputLen, time_t& utcTime) {
    try {
        utcTime = ParseUnsafe<TRfc822DateTimeParser, TInstant>(input, inputLen).TimeT();
        return true;
    } catch (const TDateTimeParseException&) {
        return false;
    }
}

bool ParseISO8601DateTime(const char* input, size_t inputLen, time_t& utcTime) {
    try {
        utcTime = ParseUnsafe<TIso8601DateTimeParser, TInstant>(input, inputLen).TimeT();
        return true;
    } catch (const TDateTimeParseException&) {
        return false;
    }
}

bool ParseHTTPDateTime(const char* input, size_t inputLen, time_t& utcTime) {
    try {
        utcTime = ParseUnsafe<THttpDateTimeParser, TInstant>(input, inputLen).TimeT();
        return true;
    } catch (const TDateTimeParseException&) {
        return false;
    }
}

bool ParseX509ValidityDateTime(const char* input, size_t inputLen, time_t& utcTime) {
    TInstant r;
    switch (inputLen) {
    case 13:
        r = Parse<TX509ValidityDateTimeParser, TInstant>(input, 13, TInstant::Max());
        break;
    case 15:
        r = Parse<TX509Validity4yDateTimeParser, TInstant>(input, 15, TInstant::Max());
        break;
    default:
        return false;
    }
    if (r == TInstant::Max())
        return false;
    utcTime = r.TimeT();
    return true;
}

%%{

machine TDurationParser;

include DateTimeParserCommon;


multiplier
    = '' #   >{ MultiplierPower =  6; } # work around Ragel bugs
    | 'w'  @{ MultiplierPower =  6; Multiplier = 604800; }
    | 'd'  @{ MultiplierPower =  6; Multiplier = 86400; }
    | 'h'  @{ MultiplierPower =  6; Multiplier = 3600; }
    | 'm'  @{ MultiplierPower =  6; Multiplier = 60; }
    | 's'  @{ MultiplierPower =  6; Multiplier = 1; }
    | 'ms' @{ MultiplierPower =  3; Multiplier = 1; }
    | 'us' @{ MultiplierPower =  0; Multiplier = 1; }
    | 'ns' @{ MultiplierPower = -3; Multiplier = 1; }
    ;

integer = int @{ IntegerPart = I; };

fraction = '.' digit {1,6} >clear_int $update_int @{ FractionPart = I; FractionDigits = Dc; } digit*;

duration = integer fraction? multiplier;

main := duration;

write data noerror;

}%%

TDurationParser::TDurationParser()
    : cs(0)
    , I(0)
    , Dc(0)
    , MultiplierPower(6)
    , Multiplier(1)
    , IntegerPart(0)
    , FractionPart(0)
    , FractionDigits(0)
{
    Y_UNUSED(TDurationParser_en_main);
    %% write init;
}

bool TDurationParser::ParsePart(const char* input, size_t len) {
    const char* p = input;
    const char* pe = input + len;

    %% write exec;
    return cs != %%{ write error; }%%;
}

static inline ui64 DecPower(ui64 part, i32 power) {
    if (power >= 0)
        return part * Power(10, power);
    return part / Power(10, -power);
}

TDuration TDurationParser::GetResult(TDuration defaultValue) const {
    if (cs < TDurationParser_first_final)
        return defaultValue;
    ui64 us = 0;
    us += Multiplier * DecPower(IntegerPart, MultiplierPower);
    us += Multiplier * DecPower(FractionPart, MultiplierPower - FractionDigits);
    return TDuration::MicroSeconds(us);
}

bool TDuration::TryParse(const TStringBuf input, TDuration& result) {
    TDuration r = ::Parse<TDurationParser, TDuration>(input.data(), input.size(), TDuration::Max());
    if (r == TDuration::Max())
        return false;
    result = r;
    return true;
}

TDuration TDuration::Parse(const TStringBuf input) {
    return ParseUnsafe<TDurationParser, TDuration>(input.data(), input.size());
}