This repository has been archived by the owner on Sep 17, 2021. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 0
/
time.c
2154 lines (1931 loc) · 51.6 KB
/
time.c
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
/**********************************************************************
time.c -
$Author$
$Date$
created at: Tue Dec 28 14:31:59 JST 1993
Copyright (C) 1993-2003 Yukihiro Matsumoto
**********************************************************************/
#include "ruby.h"
#include <sys/types.h>
#include <time.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
VALUE rb_cTime;
struct time_object {
struct timeval tv;
struct tm tm;
int gmt;
int tm_got;
};
#define GetTimeval(obj, tobj) \
Data_Get_Struct(obj, struct time_object, tobj)
static void time_free _((void *));
static VALUE time_utc_offset _((VALUE));
static void
time_free(tobj)
void *tobj;
{
if (tobj) free(tobj);
}
static VALUE time_s_alloc _((VALUE));
static VALUE
time_s_alloc(klass)
VALUE klass;
{
VALUE obj;
struct time_object *tobj;
obj = Data_Make_Struct(klass, struct time_object, 0, time_free, tobj);
tobj->tm_got=0;
tobj->tv.tv_sec = 0;
tobj->tv.tv_usec = 0;
return obj;
}
static void
time_modify(time)
VALUE time;
{
rb_check_frozen(time);
if (!OBJ_TAINTED(time) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: can't modify Time");
}
/*
* Document-method: now
*
* Synonym for <code>Time.new</code>. Returns a +Time+ object
* initialized tot he current system time.
*
* call-seq:
* Time.new -> time
*
* Returns a <code>Time</code> object initialized to the current system
* time. <b>Note:</b> The object created will be created using the
* resolution available on your system clock, and so may include
* fractional seconds.
*
* a = Time.new #=> Wed Apr 09 08:56:03 CDT 2003
* b = Time.new #=> Wed Apr 09 08:56:03 CDT 2003
* a == b #=> false
* "%.6f" % a.to_f #=> "1049896563.230740"
* "%.6f" % b.to_f #=> "1049896563.231466"
*
*/
static VALUE
time_init(time)
VALUE time;
{
struct time_object *tobj;
time_modify(time);
GetTimeval(time, tobj);
tobj->tm_got=0;
tobj->tv.tv_sec = 0;
tobj->tv.tv_usec = 0;
if (gettimeofday(&tobj->tv, 0) < 0) {
rb_sys_fail("gettimeofday");
}
return time;
}
#define NDIV(x,y) (-(-((x)+1)/(y))-1)
#define NMOD(x,y) ((y)-(-((x)+1)%(y))-1)
static void
time_overflow_p(secp, usecp)
time_t *secp, *usecp;
{
time_t tmp, sec = *secp, usec = *usecp;
if (usec >= 1000000) { /* usec positive overflow */
tmp = sec + usec / 1000000;
usec %= 1000000;
if (sec > 0 && tmp < 0) {
rb_raise(rb_eRangeError, "out of Time range");
}
sec = tmp;
}
if (usec < 0) { /* usec negative overflow */
tmp = sec + NDIV(usec,1000000); /* negative div */
usec = NMOD(usec,1000000); /* negative mod */
if (sec < 0 && tmp > 0) {
rb_raise(rb_eRangeError, "out of Time range");
}
sec = tmp;
}
#ifndef NEGATIVE_TIME_T
if (sec < 0 || (sec == 0 && usec < 0))
rb_raise(rb_eArgError, "time must be positive");
#endif
*secp = sec;
*usecp = usec;
}
static VALUE time_new_internal _((VALUE, time_t, time_t));
static VALUE
time_new_internal(klass, sec, usec)
VALUE klass;
time_t sec, usec;
{
VALUE time = time_s_alloc(klass);
struct time_object *tobj;
GetTimeval(time, tobj);
time_overflow_p(&sec, &usec);
tobj->tv.tv_sec = sec;
tobj->tv.tv_usec = usec;
return time;
}
VALUE
rb_time_new(sec, usec)
time_t sec, usec;
{
return time_new_internal(rb_cTime, sec, usec);
}
static struct timeval
time_timeval(time, interval)
VALUE time;
int interval;
{
struct timeval t;
const char *tstr = interval ? "time interval" : "time";
#ifndef NEGATIVE_TIME_T
interval = 1;
#endif
switch (TYPE(time)) {
case T_FIXNUM:
t.tv_sec = FIX2LONG(time);
if (interval && t.tv_sec < 0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
t.tv_usec = 0;
break;
case T_FLOAT:
if (interval && RFLOAT(time)->value < 0.0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
else {
double f, d;
d = modf(RFLOAT(time)->value, &f);
if (d >= 0) {
t.tv_usec = (int)(d*1e6+0.5);
}
else if ((t.tv_usec = (int)(-d*1e6+0.5)) > 0) {
t.tv_usec = 1000000 - t.tv_usec;
f -= 1;
}
t.tv_sec = (time_t)f;
if (f != t.tv_sec) {
rb_raise(rb_eRangeError, "%f out of Time range", RFLOAT(time)->value);
}
}
break;
case T_BIGNUM:
t.tv_sec = NUM2LONG(time);
if (interval && t.tv_sec < 0)
rb_raise(rb_eArgError, "%s must be positive", tstr);
t.tv_usec = 0;
break;
default:
rb_raise(rb_eTypeError, "can't convert %s into %s",
rb_obj_classname(time), tstr);
break;
}
return t;
}
struct timeval
rb_time_interval(time)
VALUE time;
{
return time_timeval(time, Qtrue);
}
struct timeval
rb_time_timeval(time)
VALUE time;
{
struct time_object *tobj;
struct timeval t;
if (TYPE(time) == T_DATA && RDATA(time)->dfree == time_free) {
GetTimeval(time, tobj);
t = tobj->tv;
return t;
}
return time_timeval(time, Qfalse);
}
/*
* call-seq:
* Time.at( aTime ) => time
* Time.at( seconds [, microseconds] ) => time
*
* Creates a new time object with the value given by <i>aTime</i>, or
* the given number of <i>seconds</i> (and optional
* <i>microseconds</i>) from epoch. A non-portable feature allows the
* offset to be negative on some systems.
*
* Time.at(0) #=> Wed Dec 31 18:00:00 CST 1969
* Time.at(946702800) #=> Fri Dec 31 23:00:00 CST 1999
* Time.at(-284061600) #=> Sat Dec 31 00:00:00 CST 1960
*/
static VALUE
time_s_at(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
struct timeval tv;
VALUE time, t;
if (rb_scan_args(argc, argv, "11", &time, &t) == 2) {
tv.tv_sec = NUM2LONG(time);
tv.tv_usec = NUM2LONG(t);
}
else {
tv = rb_time_timeval(time);
}
t = time_new_internal(klass, tv.tv_sec, tv.tv_usec);
if (TYPE(time) == T_DATA && RDATA(time)->dfree == time_free) {
struct time_object *tobj, *tobj2;
GetTimeval(time, tobj);
GetTimeval(t, tobj2);
tobj2->gmt = tobj->gmt;
}
return t;
}
static const char months[][4] = {
"jan", "feb", "mar", "apr", "may", "jun",
"jul", "aug", "sep", "oct", "nov", "dec",
};
static long
obj2long(obj)
VALUE obj;
{
if (TYPE(obj) == T_STRING) {
obj = rb_str_to_inum(obj, 10, Qfalse);
}
return NUM2LONG(obj);
}
static void
time_arg(argc, argv, tm, usec)
int argc;
VALUE *argv;
struct tm *tm;
time_t *usec;
{
VALUE v[8];
int i;
long year;
MEMZERO(tm, struct tm, 1);
*usec = 0;
if (argc == 10) {
v[0] = argv[5];
v[1] = argv[4];
v[2] = argv[3];
v[3] = argv[2];
v[4] = argv[1];
v[5] = argv[0];
v[6] = Qnil;
tm->tm_isdst = RTEST(argv[8]) ? 1 : 0;
}
else {
rb_scan_args(argc, argv, "17", &v[0],&v[1],&v[2],&v[3],&v[4],&v[5],&v[6],&v[7]);
/* v[6] may be usec or zone (parsedate) */
/* v[7] is wday (parsedate; ignored) */
tm->tm_wday = -1;
tm->tm_isdst = -1;
}
year = obj2long(v[0]);
if (0 <= year && year < 39) {
year += 100;
rb_warning("2 digits year is used");
}
else if (69 <= year && year < 139) {
rb_warning("2 or 3 digits year is used");
}
else {
year -= 1900;
}
tm->tm_year = year;
if (NIL_P(v[1])) {
tm->tm_mon = 0;
}
else {
VALUE s = rb_check_string_type(v[1]);
if (!NIL_P(s)) {
tm->tm_mon = -1;
for (i=0; i<12; i++) {
if (RSTRING(s)->len == 3 &&
strcasecmp(months[i], RSTRING(s)->ptr) == 0) {
tm->tm_mon = i;
break;
}
}
if (tm->tm_mon == -1) {
char c = RSTRING(s)->ptr[0];
if ('0' <= c && c <= '9') {
tm->tm_mon = obj2long(s)-1;
}
}
}
else {
tm->tm_mon = obj2long(v[1])-1;
}
}
if (NIL_P(v[2])) {
tm->tm_mday = 1;
}
else {
tm->tm_mday = obj2long(v[2]);
}
tm->tm_hour = NIL_P(v[3])?0:obj2long(v[3]);
tm->tm_min = NIL_P(v[4])?0:obj2long(v[4]);
tm->tm_sec = NIL_P(v[5])?0:obj2long(v[5]);
if (!NIL_P(v[6])) {
if (argc == 8) {
/* v[6] is timezone, but ignored */
}
else if (argc == 7) {
*usec = obj2long(v[6]);
}
}
/* value validation */
if (
tm->tm_year != year ||
#ifndef NEGATIVE_TIME_T
tm->tm_year < 69 ||
#endif
tm->tm_mon < 0 || tm->tm_mon > 11
|| tm->tm_mday < 1 || tm->tm_mday > 31
|| tm->tm_hour < 0 || tm->tm_hour > 23
|| tm->tm_min < 0 || tm->tm_min > 59
|| tm->tm_sec < 0 || tm->tm_sec > 60)
rb_raise(rb_eArgError, "argument out of range");
}
static VALUE time_gmtime _((VALUE));
static VALUE time_localtime _((VALUE));
static VALUE time_get_tm _((VALUE, int));
static int
leap_year_p(y)
long y;
{
return ((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0);
}
#define DIV(n,d) ((n)<0 ? NDIV((n),(d)) : (n)/(d))
static time_t
timegm_noleapsecond(tm)
struct tm *tm;
{
static int common_year_yday_offset[] = {
-1,
-1 + 31,
-1 + 31 + 28,
-1 + 31 + 28 + 31,
-1 + 31 + 28 + 31 + 30,
-1 + 31 + 28 + 31 + 30 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
-1 + 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30
/* 1 2 3 4 5 6 7 8 9 10 11 */
};
static int leap_year_yday_offset[] = {
-1,
-1 + 31,
-1 + 31 + 29,
-1 + 31 + 29 + 31,
-1 + 31 + 29 + 31 + 30,
-1 + 31 + 29 + 31 + 30 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
-1 + 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30
/* 1 2 3 4 5 6 7 8 9 10 11 */
};
long tm_year = tm->tm_year;
int tm_yday = tm->tm_mday;
if (leap_year_p(tm_year + 1900))
tm_yday += leap_year_yday_offset[tm->tm_mon];
else
tm_yday += common_year_yday_offset[tm->tm_mon];
/*
* `Seconds Since the Epoch' in SUSv3:
* tm_sec + tm_min*60 + tm_hour*3600 + tm_yday*86400 +
* (tm_year-70)*31536000 + ((tm_year-69)/4)*86400 -
* ((tm_year-1)/100)*86400 + ((tm_year+299)/400)*86400
*/
return tm->tm_sec + tm->tm_min*60 + tm->tm_hour*3600 +
(time_t)(tm_yday +
(tm_year-70)*365 +
DIV(tm_year-69,4) -
DIV(tm_year-1,100) +
DIV(tm_year+299,400))*86400;
}
static int
tmcmp(a, b)
struct tm *a;
struct tm *b;
{
if (a->tm_year != b->tm_year)
return a->tm_year < b->tm_year ? -1 : 1;
else if (a->tm_mon != b->tm_mon)
return a->tm_mon < b->tm_mon ? -1 : 1;
else if (a->tm_mday != b->tm_mday)
return a->tm_mday < b->tm_mday ? -1 : 1;
else if (a->tm_hour != b->tm_hour)
return a->tm_hour < b->tm_hour ? -1 : 1;
else if (a->tm_min != b->tm_min)
return a->tm_min < b->tm_min ? -1 : 1;
else if (a->tm_sec != b->tm_sec)
return a->tm_sec < b->tm_sec ? -1 : 1;
else
return 0;
}
#if SIZEOF_TIME_T == SIZEOF_LONG
typedef unsigned long unsigned_time_t;
#elif SIZEOF_TIME_T == SIZEOF_INT
typedef unsigned int unsigned_time_t;
#elif SIZEOF_TIME_T == SIZEOF_LONG_LONG
typedef unsigned LONG_LONG unsigned_time_t;
#else
# error cannot find integer type which size is same as time_t.
#endif
static time_t
search_time_t(tptr, utc_p)
struct tm *tptr;
int utc_p;
{
time_t guess, guess_lo, guess_hi;
struct tm *tm, tm_lo, tm_hi;
int d, have_guess;
int find_dst;
find_dst = 0 < tptr->tm_isdst;
#ifdef NEGATIVE_TIME_T
guess_lo = (time_t)~((unsigned_time_t)~(time_t)0 >> 1);
#else
guess_lo = 0;
#endif
guess_hi = ((time_t)-1) < ((time_t)0) ?
(time_t)((unsigned_time_t)~(time_t)0 >> 1) :
~(time_t)0;
guess = timegm_noleapsecond(tptr);
tm = (utc_p ? gmtime : localtime)(&guess);
if (tm) {
d = tmcmp(tptr, tm);
if (d == 0) return guess;
if (d < 0) {
guess_hi = guess;
guess -= 24 * 60 * 60;
}
else {
guess_lo = guess;
guess += 24 * 60 * 60;
}
if (guess_lo < guess && guess < guess_hi &&
(tm = (utc_p ? gmtime : localtime)(&guess)) != NULL) {
d = tmcmp(tptr, tm);
if (d == 0) return guess;
if (d < 0)
guess_hi = guess;
else
guess_lo = guess;
}
}
tm = (utc_p ? gmtime : localtime)(&guess_lo);
if (!tm) goto error;
d = tmcmp(tptr, tm);
if (d < 0) goto out_of_range;
if (d == 0) return guess_lo;
tm_lo = *tm;
tm = (utc_p ? gmtime : localtime)(&guess_hi);
if (!tm) goto error;
d = tmcmp(tptr, tm);
if (d > 0) goto out_of_range;
if (d == 0) return guess_hi;
tm_hi = *tm;
have_guess = 0;
while (guess_lo + 1 < guess_hi) {
/* there is a gap between guess_lo and guess_hi. */
unsigned long range = 0;
if (!have_guess) {
int a, b;
/*
Try precious guess by a linear interpolation at first.
`a' and `b' is a coefficient of guess_lo and guess_hi as:
guess = (guess_lo * a + guess_hi * b) / (a + b)
However this causes overflow in most cases, following assignment
is used instead:
guess = guess_lo / d * a + (guess_lo % d) * a / d
+ guess_hi / d * b + (guess_hi % d) * b / d
where d = a + b
To avoid overflow in this assignment, `d' is restricted to less than
sqrt(2**31). By this restriction and other reasons, the guess is
not accurate and some error is expected. `range' approximates
the maximum error.
When these parameters are not suitable, i.e. guess is not within
guess_lo and guess_hi, simple guess by binary search is used.
*/
range = 366 * 24 * 60 * 60;
a = (tm_hi.tm_year - tptr->tm_year);
b = (tptr->tm_year - tm_lo.tm_year);
/* 46000 is selected as `some big number less than sqrt(2**31)'. */
if (a + b <= 46000 / 12) {
range = 31 * 24 * 60 * 60;
a *= 12;
b *= 12;
a += tm_hi.tm_mon - tptr->tm_mon;
b += tptr->tm_mon - tm_lo.tm_mon;
if (a + b <= 46000 / 31) {
range = 24 * 60 * 60;
a *= 31;
b *= 31;
a += tm_hi.tm_mday - tptr->tm_mday;
b += tptr->tm_mday - tm_lo.tm_mday;
if (a + b <= 46000 / 24) {
range = 60 * 60;
a *= 24;
b *= 24;
a += tm_hi.tm_hour - tptr->tm_hour;
b += tptr->tm_hour - tm_lo.tm_hour;
if (a + b <= 46000 / 60) {
range = 60;
a *= 60;
b *= 60;
a += tm_hi.tm_min - tptr->tm_min;
b += tptr->tm_min - tm_lo.tm_min;
if (a + b <= 46000 / 60) {
range = 1;
a *= 60;
b *= 60;
a += tm_hi.tm_sec - tptr->tm_sec;
b += tptr->tm_sec - tm_lo.tm_sec;
}
}
}
}
}
if (a <= 0) a = 1;
if (b <= 0) b = 1;
d = a + b;
/*
Although `/' and `%' may produce unexpected result with negative
argument, it doesn't cause serious problem because there is a
fail safe.
*/
guess = guess_lo / d * a + (guess_lo % d) * a / d
+ guess_hi / d * b + (guess_hi % d) * b / d;
have_guess = 1;
}
if (guess <= guess_lo || guess_hi <= guess) {
/* Precious guess is invalid. try binary search. */
guess = guess_lo / 2 + guess_hi / 2;
if (guess <= guess_lo)
guess = guess_lo + 1;
else if (guess >= guess_hi)
guess = guess_hi - 1;
range = 0;
}
tm = (utc_p ? gmtime : localtime)(&guess);
if (!tm) goto error;
have_guess = 0;
d = tmcmp(tptr, tm);
if (d < 0) {
guess_hi = guess;
tm_hi = *tm;
if (range) {
guess = guess - range;
range = 0;
if (guess_lo < guess && guess < guess_hi)
have_guess = 1;
}
}
else if (d > 0) {
guess_lo = guess;
tm_lo = *tm;
if (range) {
guess = guess + range;
range = 0;
if (guess_lo < guess && guess < guess_hi)
have_guess = 1;
}
}
else {
if (!utc_p) {
/* If localtime is nonmonotonic, another result may exist. */
time_t guess2;
if (find_dst) {
guess2 = guess - 2 * 60 * 60;
tm = localtime(&guess2);
if (tm) {
if (tptr->tm_hour != (tm->tm_hour + 2) % 24 ||
tptr->tm_min != tm->tm_min ||
tptr->tm_sec != tm->tm_sec) {
guess2 -= (tm->tm_hour - tptr->tm_hour) * 60 * 60 +
(tm->tm_min - tptr->tm_min) * 60 +
(tm->tm_sec - tptr->tm_sec);
if (tptr->tm_mday != tm->tm_mday)
guess2 += 24 * 60 * 60;
if (guess != guess2) {
tm = localtime(&guess2);
if (tmcmp(tptr, tm) == 0) {
if (guess < guess2)
return guess;
else
return guess2;
}
}
}
}
}
else {
guess2 = guess + 2 * 60 * 60;
tm = localtime(&guess2);
if (tm) {
if ((tptr->tm_hour + 2) % 24 != tm->tm_hour ||
tptr->tm_min != tm->tm_min ||
tptr->tm_sec != tm->tm_sec) {
guess2 -= (tm->tm_hour - tptr->tm_hour) * 60 * 60 +
(tm->tm_min - tptr->tm_min) * 60 +
(tm->tm_sec - tptr->tm_sec);
if (tptr->tm_mday != tm->tm_mday)
guess2 -= 24 * 60 * 60;
if (guess != guess2) {
tm = localtime(&guess2);
if (tmcmp(tptr, tm) == 0) {
if (guess < guess2)
return guess2;
else
return guess;
}
}
}
}
}
}
return guess;
}
}
/* Given argument has no corresponding time_t. Let's outerpolation. */
if (tm_lo.tm_year == tptr->tm_year && tm_lo.tm_mon == tptr->tm_mon) {
return guess_lo +
(tptr->tm_mday - tm_lo.tm_mday) * 24 * 60 * 60 +
(tptr->tm_hour - tm_lo.tm_hour) * 60 * 60 +
(tptr->tm_min - tm_lo.tm_min) * 60 +
(tptr->tm_sec - tm_lo.tm_sec);
}
else if (tm_hi.tm_year == tptr->tm_year && tm_hi.tm_mon == tptr->tm_mon) {
return guess_hi +
(tptr->tm_mday - tm_hi.tm_mday) * 24 * 60 * 60 +
(tptr->tm_hour - tm_hi.tm_hour) * 60 * 60 +
(tptr->tm_min - tm_hi.tm_min) * 60 +
(tptr->tm_sec - tm_hi.tm_sec);
}
out_of_range:
rb_raise(rb_eArgError, "time out of range");
error:
rb_raise(rb_eArgError, "gmtime/localtime error");
return 0; /* not reached */
}
static time_t
make_time_t(tptr, utc_p)
struct tm *tptr;
int utc_p;
{
time_t t;
#ifdef NEGATIVE_TIME_T
struct tm *tmp;
#endif
struct tm buf;
buf = *tptr;
if (utc_p) {
#if defined(HAVE_TIMEGM)
if ((t = timegm(&buf)) != -1)
return t;
#ifdef NEGATIVE_TIME_T
if ((tmp = gmtime(&t)) &&
tptr->tm_year == tmp->tm_year &&
tptr->tm_mon == tmp->tm_mon &&
tptr->tm_mday == tmp->tm_mday &&
tptr->tm_hour == tmp->tm_hour &&
tptr->tm_min == tmp->tm_min &&
tptr->tm_sec == tmp->tm_sec)
return t;
#endif
#endif
return search_time_t(&buf, utc_p);
}
else {
#if defined(HAVE_MKTIME)
if ((t = mktime(&buf)) != -1)
return t;
#ifdef NEGATIVE_TIME_T
if ((tmp = localtime(&t)) &&
tptr->tm_year == tmp->tm_year &&
tptr->tm_mon == tmp->tm_mon &&
tptr->tm_mday == tmp->tm_mday &&
tptr->tm_hour == tmp->tm_hour &&
tptr->tm_min == tmp->tm_min &&
tptr->tm_sec == tmp->tm_sec)
return t;
#endif
#endif
return search_time_t(&buf, utc_p);
}
}
static VALUE
time_utc_or_local(argc, argv, utc_p, klass)
int argc;
VALUE *argv;
int utc_p;
VALUE klass;
{
struct tm tm;
VALUE time;
time_t usec;
time_arg(argc, argv, &tm, &usec);
time = time_new_internal(klass, make_time_t(&tm, utc_p), usec);
if (utc_p) return time_gmtime(time);
return time_localtime(time);
}
/*
* call-seq:
* Time.utc( year [, month, day, hour, min, sec, usec] ) => time
* Time.utc( sec, min, hour, day, month, year, wday, yday, isdst, tz
* ) => time
* Time.gm( year [, month, day, hour, min, sec, usec] ) => time
* Time.gm( sec, min, hour, day, month, year, wday, yday, isdst, tz
* ) => time
*
* Creates a time based on given values, interpreted as UTC (GMT). The
* year must be specified. Other values default to the minimum value
* for that field (and may be <code>nil</code> or omitted). Months may
* be specified by numbers from 1 to 12, or by the three-letter English
* month names. Hours are specified on a 24-hour clock (0..23). Raises
* an <code>ArgumentError</code> if any values are out of range. Will
* also accept ten arguments in the order output by
* <code>Time#to_a</code>.
*
* Time.utc(2000,"jan",1,20,15,1) #=> Sat Jan 01 20:15:01 UTC 2000
* Time.gm(2000,"jan",1,20,15,1) #=> Sat Jan 01 20:15:01 UTC 2000
*/
static VALUE
time_s_mkutc(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
return time_utc_or_local(argc, argv, Qtrue, klass);
}
/*
* call-seq:
* Time.local( year [, month, day, hour, min, sec, usec] ) => time
* Time.local( sec, min, hour, day, month, year, wday, yday, isdst,
* tz ) => time
* Time.mktime( year, month, day, hour, min, sec, usec ) => time
*
* Same as <code>Time::gm</code>, but interprets the values in the
* local time zone.
*
* Time.local(2000,"jan",1,20,15,1) #=> Sat Jan 01 20:15:01 CST 2000
*/
static VALUE
time_s_mktime(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
return time_utc_or_local(argc, argv, Qfalse, klass);
}
/*
* call-seq:
* time.to_i => int
* time.tv_sec => int
*
* Returns the value of <i>time</i> as an integer number of seconds
* since epoch.
*
* t = Time.now
* "%10.5f" % t.to_f #=> "1049896564.17839"
* t.to_i #=> 1049896564
*/
static VALUE
time_to_i(time)
VALUE time;
{
struct time_object *tobj;
GetTimeval(time, tobj);
return LONG2NUM(tobj->tv.tv_sec);
}
/*
* call-seq:
* time.to_f => float
*
* Returns the value of <i>time</i> as a floating point number of
* seconds since epoch.
*
* t = Time.now
* "%10.5f" % t.to_f #=> "1049896564.13654"
* t.to_i #=> 1049896564
*/
static VALUE
time_to_f(time)
VALUE time;
{
struct time_object *tobj;
GetTimeval(time, tobj);
return rb_float_new((double)tobj->tv.tv_sec+(double)tobj->tv.tv_usec/1e6);
}
/*
* call-seq:
* time.usec => int
* time.tv_usec => int
*
* Returns just the number of microseconds for <i>time</i>.
*
* t = Time.now #=> Wed Apr 09 08:56:04 CDT 2003
* "%10.6f" % t.to_f #=> "1049896564.259970"
* t.usec #=> 259970
*/
static VALUE
time_usec(time)
VALUE time;
{
struct time_object *tobj;
GetTimeval(time, tobj);
return LONG2NUM(tobj->tv.tv_usec);
}
/*
* call-seq:
* time <=> other_time => -1, 0, +1
* time <=> numeric => -1, 0, +1
*
* Comparison---Compares <i>time</i> with <i>other_time</i> or with
* <i>numeric</i>, which is the number of seconds (possibly
* fractional) since epoch.
*
* t = Time.now #=> Wed Apr 09 08:56:03 CDT 2003
* t2 = t + 2592000 #=> Fri May 09 08:56:03 CDT 2003
* t <=> t2 #=> -1
* t2 <=> t #=> 1
* t <=> t #=> 0
*/
static VALUE
time_cmp(time1, time2)
VALUE time1, time2;
{
struct time_object *tobj1, *tobj2;
GetTimeval(time1, tobj1);
if (TYPE(time2) == T_DATA && RDATA(time2)->dfree == time_free) {
GetTimeval(time2, tobj2);
if (tobj1->tv.tv_sec == tobj2->tv.tv_sec) {
if (tobj1->tv.tv_usec == tobj2->tv.tv_usec) return INT2FIX(0);
if (tobj1->tv.tv_usec > tobj2->tv.tv_usec) return INT2FIX(1);
return INT2FIX(-1);
}
if (tobj1->tv.tv_sec > tobj2->tv.tv_sec) return INT2FIX(1);
return INT2FIX(-1);
}
return Qnil;
}
/*
* call-seq:
* time.eql?(other_time)
*
* Return <code>true</code> if <i>time</i> and <i>other_time</i> are
* both <code>Time</code> objects with the same seconds and fractional
* seconds.
*/
static VALUE
time_eql(time1, time2)
VALUE time1, time2;
{
struct time_object *tobj1, *tobj2;
GetTimeval(time1, tobj1);
if (TYPE(time2) == T_DATA && RDATA(time2)->dfree == time_free) {
GetTimeval(time2, tobj2);
if (tobj1->tv.tv_sec == tobj2->tv.tv_sec) {