summaryrefslogtreecommitdiff
path: root/time.c
blob: c8658d9785505177909ce7c0f9519d511aca5341 (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
/************************************************

  time.c -

  $Author$
  $Date$
  created at: Tue Dec 28 14:31:59 JST 1993

  Copyright (C) 1993-1999 Yukihiro Matsumoto

************************************************/

#include "ruby.h"
#include <sys/types.h>

#include <time.h>
#ifndef NT
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#else
#define time_t long
struct timeval {
        time_t tv_sec;		/* seconds */
        time_t tv_usec;		/* and microseconds */
};
#endif
#endif /* NT */

#ifdef HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif

#ifdef USE_CWGUSI
#define time_t long
int gettimeofday(struct timeval*, struct timezone*);
int strcasecmp(char*, char*);
#endif

#if 0
#include <math.h>
#endif

VALUE rb_cTime;
#if defined(HAVE_TIMES) || defined(NT)
static VALUE S_Tms;
#endif

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 VALUE
time_s_now(klass)
    VALUE klass;
{
    VALUE obj;
    struct time_object *tobj;

    obj = Data_Make_Struct(klass, struct time_object, 0, free, tobj);
    tobj->tm_got=0;

    if (gettimeofday(&(tobj->tv), 0) < 0) {
	rb_sys_fail("gettimeofday");
    }
    rb_obj_call_init(obj, 0, 0);

    return obj;
}

static VALUE
time_new_internal(klass, sec, usec)
    VALUE klass;
    time_t sec, usec;
{
    VALUE obj;
    struct time_object *tobj;

#ifndef USE_CWGUSI
    if (sec < 0 || (sec == 0 && usec < 0))
	rb_raise(rb_eArgError, "time must be positive");
#endif
    obj = Data_Make_Struct(klass, struct time_object, 0, free, tobj);
    tobj->tm_got = 0;
    tobj->tv.tv_sec = sec;
    tobj->tv.tv_usec = usec;

    return obj;
}

VALUE
rb_time_new(sec, usec)
    time_t sec, usec;
{
    return time_new_internal(rb_cTime, sec, usec);
}

struct timeval
rb_time_timeval(time)
    VALUE time;
{
    struct time_object *tobj;
    struct timeval t;

    switch (TYPE(time)) {
      case T_FIXNUM:
	t.tv_sec = FIX2LONG(time);
	if (t.tv_sec < 0)
	    rb_raise(rb_eArgError, "time must be positive");
	t.tv_usec = 0;
	break;

      case T_FLOAT:
	if (RFLOAT(time)->value < 0.0)
	    rb_raise(rb_eArgError, "time must be positive");
	t.tv_sec = (time_t)RFLOAT(time)->value;
	t.tv_usec = (time_t)((RFLOAT(time)->value - (double)t.tv_sec)*1e6);
	break;

      case T_BIGNUM:
	t.tv_sec = NUM2LONG(time);
	if (t.tv_sec < 0)
	    rb_raise(rb_eArgError, "time must be positive");
	t.tv_usec = 0;
	break;

      default:
	if (!rb_obj_is_kind_of(time, rb_cTime)) {
	    rb_raise(rb_eTypeError, "can't convert %s into Time",
		     rb_class2name(CLASS_OF(time)));
	}
	GetTimeval(time, tobj);
	t = tobj->tv;
	break;
    }
    return t;
}

static VALUE
time_s_at(klass, time)
    VALUE klass, time;
{
    struct timeval tv;
    VALUE t;

    tv = rb_time_timeval(time);
    t = time_new_internal(klass, tv.tv_sec, tv.tv_usec);
    if (TYPE(time) == T_DATA) {
	struct time_object *tobj, *tobj2;

	GetTimeval(time, tobj);
	GetTimeval(t, tobj2);
	tobj2->gmt = tobj->gmt;
    }
    return t;
}

static char *months [12] = {
    "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_str2inum(RSTRING(obj)->ptr, 10);
    }

    return NUM2LONG(obj);
}

static void
time_arg(argc, argv, tm)
    int argc;
    VALUE *argv;
    struct tm *tm;
{
    VALUE v[6];
    int i;

    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];
    }
    else {
	rb_scan_args(argc, argv, "15", &v[0],&v[1],&v[2],&v[3],&v[4],&v[5]);
    }

    tm->tm_year = obj2long(v[0]);
    if (tm->tm_year < 69) tm->tm_year += 100;
    if (tm->tm_year >= 1000) tm->tm_year -= 1900;
    if (NIL_P(v[1])) {
	tm->tm_mon = 0;
    }
    else if (TYPE(v[1]) == T_STRING) {
	tm->tm_mon = -1;
	for (i=0; i<12; i++) {
	    if (RSTRING(v[1])->len == 3 &&
		strcasecmp(months[i], RSTRING(v[1])->ptr) == 0) {
		tm->tm_mon = i;
		break;
	    }
	}
	if (tm->tm_mon == -1) {
	    char c = RSTRING(v[1])->ptr[0];

	    if ('0' <= c && c <= '9') {
		tm->tm_mon = obj2long(v[1])-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]);

    /* value validation */
    if (   tm->tm_year < 69
	|| 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 time_t
make_time_t(tptr, fn)
    struct tm *tptr;
    struct tm *(*fn)();
{
    struct timeval tv;
    time_t guess, t;
    struct tm *tm;
    long diff;

    if (gettimeofday(&tv, 0) < 0) {
	rb_sys_fail("gettimeofday");
    }
    guess = tv.tv_sec;

    tm = (*fn)(&guess);
    if (!tm) goto error;
    t = tptr->tm_year;
    if (t < 69) goto out_of_range;
    while (diff = t - (tm->tm_year)) {
	guess += diff * 364 * 24 * 3600;
	if (diff > 0 && guess < 0) goto out_of_range;
	tm = (*fn)(&guess);
	if (!tm) goto error;
    }
    t = tptr->tm_mon;
    while (diff = t - tm->tm_mon) {
	guess += diff * 27 * 24 * 3600;
	tm = (*fn)(&guess);
	if (!tm) goto error;
	if (tptr->tm_year != tm->tm_year) goto out_of_range;
    }
    guess += (tptr->tm_mday - tm->tm_mday) * 3600 * 24;
    guess += (tptr->tm_hour - tm->tm_hour) * 3600;
    guess += (tptr->tm_min - tm->tm_min) * 60;
    guess +=  tptr->tm_sec - tm->tm_sec;
    if (guess < 0) goto out_of_range;

    return guess;

  out_of_range:
    rb_raise(rb_eArgError, "time out of range");

  error:
    rb_raise(rb_eArgError, "gmtime/localtime error");
    return Qnil;		/* not reached */
}

static VALUE
time_gm_or_local(argc, argv, gm_or_local, klass)
    int argc;
    VALUE *argv;
    int gm_or_local;
    VALUE klass;
{
    struct tm tm;
    struct tm *(*fn)();
    VALUE time;

    fn = (gm_or_local) ? gmtime : localtime;
    time_arg(argc, argv, &tm);

    time = time_new_internal(klass, make_time_t(&tm, fn), 0);
    if (gm_or_local) return time_gmtime(time);
    return time_localtime(time);
}

static VALUE
time_s_timegm(argc, argv, klass)
    int argc;
    VALUE *argv;
    VALUE klass;
{
    return time_gm_or_local(argc, argv, 1, klass);
}

static VALUE
time_s_timelocal(argc, argv, klass)
    int argc;
    VALUE *argv;
    VALUE klass;
{
    return time_gm_or_local(argc, argv, 0, klass);
}

static VALUE
time_to_i(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return INT2NUM(tobj->tv.tv_sec);
}

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/1000000);
}

static VALUE
time_usec(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    return INT2NUM(tobj->tv.tv_usec);
}

static VALUE
time_cmp(time1, time2)
    VALUE time1, time2;
{
    struct time_object *tobj1, *tobj2;
    long i;

    GetTimeval(time1, tobj1);
    switch (TYPE(time2)) {
      case T_FIXNUM:
	i = FIX2LONG(time2);
	if (tobj1->tv.tv_sec == i) return INT2FIX(0);
	if (tobj1->tv.tv_sec > i) return INT2FIX(1);
	return FIX2INT(-1);
	
      case T_FLOAT:
	{
	    double t;

	    if (tobj1->tv.tv_sec == (time_t)RFLOAT(time2)->value)
		return INT2FIX(0);
	    t = (double)tobj1->tv.tv_sec + (double)tobj1->tv.tv_usec*1e-6;
	    if (tobj1->tv.tv_sec == (time_t)RFLOAT(time2)->value)
		return INT2FIX(0);
	    if (tobj1->tv.tv_sec > (time_t)RFLOAT(time2)->value)
		return INT2FIX(1);
	    return FIX2INT(-1);
	}
    }

    if (rb_obj_is_instance_of(time2, rb_cTime)) {
	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 FIX2INT(-1);
	}
	if (tobj1->tv.tv_sec > tobj2->tv.tv_sec) return INT2FIX(1);
	return FIX2INT(-1);
    }
    i = NUM2LONG(time2);
    if (tobj1->tv.tv_sec == i) return INT2FIX(0);
    if (tobj1->tv.tv_sec > i) return INT2FIX(1);
    return FIX2INT(-1);
}

static VALUE
time_eql(time1, time2)
    VALUE time1, time2;
{
    struct time_object *tobj1, *tobj2;

    GetTimeval(time1, tobj1);
    if (rb_obj_is_instance_of(time2, rb_cTime)) {
	GetTimeval(time2, tobj2);
	if (tobj1->tv.tv_sec == tobj2->tv.tv_sec) {
	    if (tobj1->tv.tv_usec == tobj2->tv.tv_usec) return Qtrue;
	}
    }
    return Qfalse;
}

static VALUE
time_gmt_p(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->gmt) return Qtrue;
    return Qfalse;
}

static VALUE
time_hash(time)
    VALUE time;
{
    struct time_object *tobj;
    long hash;

    GetTimeval(time, tobj);
    hash = tobj->tv.tv_sec ^ tobj->tv.tv_usec;
    return INT2FIX(hash);
}

static VALUE
time_clone(time)
    VALUE time;
{
    VALUE obj;
    struct time_object *tobj, *newtobj;

    GetTimeval(time, tobj);
    obj = Data_Make_Struct(0, struct time_object, 0, free, newtobj);
    CLONESETUP(obj, time);
    MEMCPY(newtobj, tobj, struct time_object, 1);

    return obj;
}

static VALUE
time_localtime(time)
    VALUE time;
{
    struct time_object *tobj;
    struct tm *tm_tmp;

    GetTimeval(time, tobj);
    tm_tmp = localtime((const time_t*)&tobj->tv.tv_sec);
    tobj->tm = *tm_tmp;
    tobj->tm_got = 1;
    tobj->gmt = 0;
    return time;
}

static VALUE
time_gmtime(time)
    VALUE time;
{
    struct time_object *tobj;
    struct tm *tm_tmp;

    GetTimeval(time, tobj);
    tm_tmp = gmtime((const time_t*)&tobj->tv.tv_sec);
    tobj->tm = *tm_tmp;
    tobj->tm_got = 1;
    tobj->gmt = 1;
    return time;
}

static VALUE
time_get_tm(time, gmt)
    VALUE time;
    int gmt;
{
    if (gmt) return time_gmtime(time);
    return time_localtime(time);
}

static VALUE
time_asctime(time)
    VALUE time;
{
    struct time_object *tobj;
    char *s;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    s = asctime(&(tobj->tm));
    if (s[24] == '\n') s[24] = '\0';

    return rb_str_new2(s);
}

static VALUE
time_to_s(time)
    VALUE time;
{
    struct time_object *tobj;
    char buf[128];
    int len;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
#ifndef HAVE_TM_ZONE
    if (tobj->gmt == 1) {
	len = strftime(buf, 128, "%a %b %d %H:%M:%S GMT %Y", &(tobj->tm));
    }
    else
#endif
    {
	len = strftime(buf, 128, "%a %b %d %H:%M:%S %Z %Y", &(tobj->tm));
    }
    return rb_str_new(buf, len);
}

static VALUE
time_plus(time1, time2)
    VALUE time1, time2;
{
    struct time_object *tobj;
    time_t sec, usec;
    double f;

    GetTimeval(time1, tobj);

    if (rb_obj_is_kind_of(time2, rb_cTime)) {
	rb_raise(rb_eTypeError, "time + time?");
    }
    f = NUM2DBL(time2);
    sec = (time_t)f;
    usec = tobj->tv.tv_usec + (time_t)((f - (double)sec)*1e6);
    sec = tobj->tv.tv_sec + sec;

    if (usec >= 1000000) {	/* usec overflow */
	sec++;
	usec -= 1000000;
    }
    time2 = rb_time_new(sec, usec);
    if (tobj->gmt) {
	GetTimeval(time2, tobj);
	tobj->gmt = 1;
    }
    return time2;
}

static VALUE
time_minus(time1, time2)
    VALUE time1, time2;
{
    struct time_object *tobj;
    time_t sec, usec;
    double f;

    GetTimeval(time1, tobj);
    if (rb_obj_is_instance_of(time2, rb_cTime)) {
	struct time_object *tobj2;

	GetTimeval(time2, tobj2);
	f = tobj->tv.tv_sec - tobj2->tv.tv_sec;
	f += (tobj->tv.tv_usec - tobj2->tv.tv_usec)*1e-6;

	return rb_float_new(f);
    }
    else {
	f = NUM2DBL(time2);
	sec = (time_t)f;
	usec = tobj->tv.tv_usec - (time_t)((f - (double)sec)*1e6);
	sec = tobj->tv.tv_sec - sec;
    }

    if (usec < 0) {		/* usec underflow */
	sec--;
	usec += 1000000;
    }
    time2 = rb_time_new(sec, usec);
    if (tobj->gmt) {
	GetTimeval(time2, tobj);
	tobj->gmt = 1;
    }
    return time2;
}

static VALUE
time_sec(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_sec);
}

static VALUE
time_min(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_min);
}

static VALUE
time_hour(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_hour);
}

static VALUE
time_mday(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_mday);
}

static VALUE
time_mon(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_mon+1);
}

static VALUE
time_year(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_year+1900);
}

static VALUE
time_wday(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_wday);
}

static VALUE
time_yday(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return INT2FIX(tobj->tm.tm_yday+1);
}

static VALUE
time_isdst(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return tobj->tm.tm_isdst?Qtrue:Qfalse;
}

static VALUE
time_zone(time)
    VALUE time;
{
    struct time_object *tobj;
    char buf[64];
    int len;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }

    len = strftime(buf, 64, "%Z", &(tobj->tm));
    return rb_str_new(buf, len);
}

static VALUE
time_to_a(time)
    VALUE time;
{
    struct time_object *tobj;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    return rb_ary_new3(10,
		    INT2FIX(tobj->tm.tm_sec),
		    INT2FIX(tobj->tm.tm_min),
		    INT2FIX(tobj->tm.tm_hour),
		    INT2FIX(tobj->tm.tm_mday),
		    INT2FIX(tobj->tm.tm_mon+1),
		    INT2FIX(tobj->tm.tm_year+1900),
		    INT2FIX(tobj->tm.tm_wday),
		    INT2FIX(tobj->tm.tm_yday+1),
		    tobj->tm.tm_isdst?Qtrue:Qfalse,
		    time_zone(time));
}

#define SMALLBUF 100
static int
rb_strftime(buf, format, time)
    char ** volatile buf;
    char * volatile format;
    struct tm * volatile time;
{
    volatile int size;
    int len, flen;

    (*buf)[0] = '\0';
    flen = strlen(format);
    if (flen == 0) {
	return 0;
    }
    len = strftime(*buf, SMALLBUF, format, time);
    if (len != 0) return len;
    for (size=1024; ; size*=2) {
	*buf = xmalloc(size);
	(*buf)[0] = '\0';
	len = strftime(*buf, size, format, time);
	/*
	 * buflen can be zero EITHER because there's not enough
	 * room in the string, or because the control command
	 * goes to the empty string. Make a reasonable guess that
	 * if the buffer is 1024 times bigger than the length of the
	 * format string, it's not failing for lack of room.
	 */
	if (len > 0 || len >= 1024 * flen) return len;
	free(*buf);
    }
    /* not reached */
}

static VALUE
time_strftime(time, format)
    VALUE time, format;
{
    struct time_object *tobj;
    char buffer[SMALLBUF];
    char *fmt;
    char *buf = buffer;
    int len;
    VALUE str;

    GetTimeval(time, tobj);
    if (tobj->tm_got == 0) {
	time_get_tm(time, tobj->gmt);
    }
    fmt = str2cstr(format, &len);
    if (len == 0) {
	rb_warning("strftime called with empty format string");
    }
    if (strlen(fmt) < len) {
	/* Ruby string may contain \0's. */
	char *p = fmt, *pe = fmt + len;

	str = rb_str_new(0, 0);
	while (p < pe) {
	    len = rb_strftime(&buf, p, &(tobj->tm));
	    rb_str_cat(str, buf, len);
	    p += strlen(p) + 1;
	    if (p <= pe)
		rb_str_cat(str, "\0", 1);
	    if (len > SMALLBUF) free(buf);
	}
	return str;
    }
    len = rb_strftime(&buf, RSTRING(format)->ptr, &(tobj->tm));
    str = rb_str_new(buf, len);
    if (buf != buffer) free(buf);
    return str;
}

static VALUE
time_s_times(obj)
    VALUE obj;
{
#ifdef HAVE_TIMES
#ifndef HZ
#define HZ 60 /* Universal constant :-) */
#endif /* HZ */
    struct tms buf;

    if (times(&buf) == -1) rb_sys_fail(0);
    return rb_struct_new(S_Tms,
			 rb_float_new((double)buf.tms_utime / HZ),
			 rb_float_new((double)buf.tms_stime / HZ),
			 rb_float_new((double)buf.tms_cutime / HZ),
			 rb_float_new((double)buf.tms_cstime / HZ));
#else
#ifdef NT
    FILETIME create, exit, kernel, user;
    HANDLE hProc;

    hProc = GetCurrentProcess();
    GetProcessTimes(hProc,&create, &exit, &kernel, &user);
    return rb_struct_new(S_Tms,
      rb_float_new((double)(kernel.dwHighDateTime*2e32+kernel.dwLowDateTime)/2e6),
      rb_float_new((double)(user.dwHighDateTime*2e32+user.dwLowDateTime)/2e6),
      rb_float_new((double)0),
      rb_float_new((double)0));
#else
    rb_notimplement();
#endif
#endif
}

static VALUE
time_dump(argc, argv, time)
    int argc;
    VALUE *argv;
    VALUE time;
{
    VALUE dummy;
    struct time_object *tobj;
    struct tm *tm;
    unsigned long p, s;
    unsigned char buf[8];
    int i;

    rb_scan_args(argc, argv, "01", &dummy);
    GetTimeval(time, tobj);

  tm = gmtime((const time_t*)&tobj->tv.tv_sec);

    p = 0x1          << 31 | /*  1 */
	tm->tm_year  << 14 | /* 17 */
	tm->tm_mon   << 10 | /*  4 */
	tm->tm_mday  <<  5 | /*  5 */
	tm->tm_hour;         /*  5 */
    s = tm->tm_min   << 26 | /*  6 */
	tm->tm_sec   << 20 | /*  6 */
	tobj->tv.tv_usec;    /* 20 */

    for (i=0; i<4; i++) {
	buf[i] = p & 0xff;
	p = RSHIFT(p, 8);
    }
    for (i=4; i<8; i++) {
	buf[i] = s & 0xff;
	s = RSHIFT(s, 8);
    }

    return rb_str_new(buf, 8);
}

static VALUE
time_load(klass, str)
    VALUE klass, str;
{
    unsigned long p, s;
    time_t sec, usec;
    unsigned char *buf;
    struct tm tm;
    int i;

    buf = str2cstr(str, &i);
    if (i != 8) {
	rb_raise(rb_eTypeError, "marshaled time format differ");
    }

    p = s = 0;
    for (i=0; i<4; i++) {
	p |= buf[i]<<(8*i);
    }
    for (i=4; i<8; i++) {
	s |= buf[i]<<(8*(i-4));
    }

    if ((p & (1<<31)) == 0) {
	return time_new_internal(klass, sec, usec);
    }
    p &= ~(1<<31);
    tm.tm_year = (p >> 14) & 0x1ffff;
    tm.tm_mon  = (p >> 10) & 0xf;
    tm.tm_mday = (p >>  5) & 0x1f;
    tm.tm_hour =  p        & 0x1f;
    tm.tm_min  = (s >> 26) & 0x3f;
    tm.tm_sec  = (s >> 20) & 0x3f;

    sec = make_time_t(&tm, gmtime);
    usec = (time_t) s & 0xfffff;

    return time_new_internal(klass, sec, usec);
}

void
Init_Time()
{
    rb_cTime = rb_define_class("Time", rb_cObject);
    rb_include_module(rb_cTime, rb_mComparable);

    rb_define_singleton_method(rb_cTime, "now", time_s_now, 0);
    rb_define_singleton_method(rb_cTime, "new", time_s_now, 0);
    rb_define_singleton_method(rb_cTime, "at", time_s_at, 1);
    rb_define_singleton_method(rb_cTime, "gm", time_s_timegm, -1);
    rb_define_singleton_method(rb_cTime, "local", time_s_timelocal, -1);
    rb_define_singleton_method(rb_cTime, "mktime", time_s_timelocal, -1);

    rb_define_singleton_method(rb_cTime, "times", time_s_times, 0);

    rb_define_method(rb_cTime, "to_i", time_to_i, 0);
    rb_define_method(rb_cTime, "to_f", time_to_f, 0);
    rb_define_method(rb_cTime, "<=>", time_cmp, 1);
    rb_define_method(rb_cTime, "eql?", time_eql, 1);
    rb_define_method(rb_cTime, "hash", time_hash, 0);
    rb_define_method(rb_cTime, "clone", time_clone, 0);

    rb_define_method(rb_cTime, "localtime", time_localtime, 0);
    rb_define_method(rb_cTime, "gmtime", time_gmtime, 0);
    rb_define_method(rb_cTime, "ctime", time_asctime, 0);
    rb_define_method(rb_cTime, "asctime", time_asctime, 0);
    rb_define_method(rb_cTime, "to_s", time_to_s, 0);
    rb_define_method(rb_cTime, "inspect", time_to_s, 0);
    rb_define_method(rb_cTime, "to_a", time_to_a, 0);

    rb_define_method(rb_cTime, "+", time_plus, 1);
    rb_define_method(rb_cTime, "-", time_minus, 1);

    rb_define_method(rb_cTime, "sec", time_sec, 0);
    rb_define_method(rb_cTime, "min", time_min, 0);
    rb_define_method(rb_cTime, "hour", time_hour, 0);
    rb_define_method(rb_cTime, "mday", time_mday, 0);
    rb_define_method(rb_cTime, "day", time_mday, 0);
    rb_define_method(rb_cTime, "mon", time_mon, 0);
    rb_define_method(rb_cTime, "month", time_mon, 0);
    rb_define_method(rb_cTime, "year", time_year, 0);
    rb_define_method(rb_cTime, "wday", time_wday, 0);
    rb_define_method(rb_cTime, "yday", time_yday, 0);
    rb_define_method(rb_cTime, "isdst", time_isdst, 0);
    rb_define_method(rb_cTime, "zone", time_zone, 0);

    rb_define_method(rb_cTime, "gmt?", time_gmt_p, 0);

    rb_define_method(rb_cTime, "tv_sec", time_to_i, 0);
    rb_define_method(rb_cTime, "tv_usec", time_usec, 0);
    rb_define_method(rb_cTime, "usec", time_usec, 0);

    rb_define_method(rb_cTime, "strftime", time_strftime, 1);

#if defined(HAVE_TIMES) || defined(NT)
    S_Tms = rb_struct_define("Tms", "utime", "stime", "cutime", "cstime", 0);
#endif

    /* methods for marshaling */
    rb_define_method(rb_cTime, "_dump", time_dump, -1);
    rb_define_singleton_method(rb_cTime, "_load", time_load, 1);
}