summaryrefslogtreecommitdiff
path: root/libgfortran/intrinsics/date_and_time.c
blob: 793df687fb9a9d718ace38a749f8c76cc9059170 (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
/* Implementation of the DATE_AND_TIME intrinsic.
   Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011
   Free Software Foundation, Inc.
   Contributed by Steven Bosscher.

This file is part of the GNU Fortran runtime library (libgfortran).

Libgfortran 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 3 of the License, or (at your option) any later version.

Libgfortran 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.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#include "libgfortran.h"
#include <string.h>
#include <assert.h>
#include <stdlib.h>

#include "time_1.h"

#ifndef abs
#define abs(x) ((x)>=0 ? (x) : -(x))
#endif


/* If the re-entrant version of gmtime is not available, provide a
   fallback implementation.  On some targets where the _r version is
   not available, gmtime uses thread-local storage so it's
   threadsafe.  */

#ifndef HAVE_GMTIME_R
/* If _POSIX is defined gmtime_r gets defined by mingw-w64 headers.  */
#ifdef gmtime_r
#undef gmtime_r
#endif

static struct tm *
gmtime_r (const time_t * timep, struct tm * result)
{
  *result = *gmtime (timep);
  return result;
}
#endif


/* DATE_AND_TIME ([DATE, TIME, ZONE, VALUES])

   Description: Returns data on the real-time clock and date in a form
   compatible with the representations defined in ISO 8601:1988.

   Class: Non-elemental subroutine.

   Arguments:

   DATE (optional) shall be scalar and of type default character.
   It is an INTENT(OUT) argument.  It is assigned a value of the
   form CCYYMMDD, where CC is the century, YY the year within the
   century, MM the month within the year, and DD the day within the
   month.  If there is no date available, they are assigned blanks.

   TIME (optional) shall be scalar and of type default character.
   It is an INTENT(OUT) argument. It is assigned a value of the
   form hhmmss.sss, where hh is the hour of the day, mm is the
   minutes of the hour, and ss.sss is the seconds and milliseconds
   of the minute.  If there is no clock available, they are assigned
   blanks.

   ZONE (optional) shall be scalar and of type default character.
   It is an INTENT(OUT) argument.  It is assigned a value of the
   form [+-]hhmm, where hh and mm are the time difference with
   respect to Coordinated Universal Time (UTC) in hours and parts
   of an hour expressed in minutes, respectively.  If there is no
   clock available, they are assigned blanks.

   VALUES (optional) shall be of type default integer and of rank
   one. It is an INTENT(OUT) argument. Its size shall be at least
   8. The values returned in VALUES are as follows:

      VALUES(1) the year (for example, 2003), or -HUGE(0) if there is
      no date available;

      VALUES(2) the month of the year, or -HUGE(0) if there
      is no date available;

      VALUES(3) the day of the month, or -HUGE(0) if there is no date
      available;

      VALUES(4) the time difference with respect to Coordinated
      Universal Time (UTC) in minutes, or -HUGE(0) if this information
      is not available;

      VALUES(5) the hour of the day, in the range of 0 to 23, or
      -HUGE(0) if there is no clock;

      VALUES(6) the minutes of the hour, in the range 0 to 59, or
      -HUGE(0) if there is no clock;

      VALUES(7) the seconds of the minute, in the range 0 to 60, or
      -HUGE(0) if there is no clock;

      VALUES(8) the milliseconds of the second, in the range 0 to
      999, or -HUGE(0) if there is no clock.

   NULL pointer represent missing OPTIONAL arguments.  All arguments
   have INTENT(OUT).  Because of the -i8 option, we must implement
   VALUES for INTEGER(kind=4) and INTEGER(kind=8).

   Based on libU77's date_time_.c.

   TODO :
   - Check year boundaries.
*/
#define DATE_LEN 8
#define TIME_LEN 10   
#define ZONE_LEN 5
#define VALUES_SIZE 8

extern void date_and_time (char *, char *, char *, gfc_array_i4 *,
			   GFC_INTEGER_4, GFC_INTEGER_4, GFC_INTEGER_4);
export_proto(date_and_time);

void
date_and_time (char *__date, char *__time, char *__zone,
	       gfc_array_i4 *__values, GFC_INTEGER_4 __date_len,
	       GFC_INTEGER_4 __time_len, GFC_INTEGER_4 __zone_len)
{
  int i;
  char date[DATE_LEN + 1];
  char timec[TIME_LEN + 1];
  char zone[ZONE_LEN + 1];
  GFC_INTEGER_4 values[VALUES_SIZE];

#ifndef HAVE_NO_DATE_TIME
  time_t lt;
  struct tm local_time;
  struct tm UTC_time;

  long usecs;

  if (!gf_gettime (&lt, &usecs))
    {
      values[7] = usecs / 1000;

      localtime_r (&lt, &local_time);
      gmtime_r (&lt, &UTC_time);

      /* All arguments can be derived from VALUES.  */
      values[0] = 1900 + local_time.tm_year;
      values[1] = 1 + local_time.tm_mon;
      values[2] = local_time.tm_mday;
      values[3] = (local_time.tm_min - UTC_time.tm_min +
	           60 * (local_time.tm_hour - UTC_time.tm_hour +
		     24 * (local_time.tm_yday - UTC_time.tm_yday)));
      values[4] = local_time.tm_hour;
      values[5] = local_time.tm_min;
      values[6] = local_time.tm_sec;

#if HAVE_SNPRINTF
      if (__date)
	snprintf (date, DATE_LEN + 1, "%04d%02d%02d",
		  values[0], values[1], values[2]);
      if (__time)
	snprintf (timec, TIME_LEN + 1, "%02d%02d%02d.%03d",
		  values[4], values[5], values[6], values[7]);

      if (__zone)
	snprintf (zone, ZONE_LEN + 1, "%+03d%02d",
		  values[3] / 60, abs (values[3] % 60));
#else
      if (__date)
	sprintf (date, "%04d%02d%02d", values[0], values[1], values[2]);

      if (__time)
	sprintf (timec, "%02d%02d%02d.%03d",
		 values[4], values[5], values[6], values[7]);

      if (__zone)
	sprintf (zone, "%+03d%02d",
		 values[3] / 60, abs (values[3] % 60));
#endif
    }
  else
    {
      memset (date, ' ', DATE_LEN);
      date[DATE_LEN] = '\0';

      memset (timec, ' ', TIME_LEN);
      timec[TIME_LEN] = '\0';

      memset (zone, ' ', ZONE_LEN);
      zone[ZONE_LEN] = '\0';

      for (i = 0; i < VALUES_SIZE; i++)
	values[i] = - GFC_INTEGER_4_HUGE;
    }   
#else /* if defined HAVE_NO_DATE_TIME  */
  /* We really have *nothing* to return, so return blanks and HUGE(0).  */
      
  memset (date, ' ', DATE_LEN);
  date[DATE_LEN] = '\0';

  memset (timec, ' ', TIME_LEN);
  timec[TIME_LEN] = '\0';

  memset (zone, ' ', ZONE_LEN);
  zone[ZONE_LEN] = '\0';

  for (i = 0; i < VALUES_SIZE; i++)
    values[i] = - GFC_INTEGER_4_HUGE;
#endif  /* HAVE_NO_DATE_TIME  */

  /* Copy the values into the arguments.  */
  if (__values)
    {
      index_type len, delta, elt_size;

      elt_size = GFC_DESCRIPTOR_SIZE (__values);
      len = GFC_DESCRIPTOR_EXTENT(__values,0);
      delta = GFC_DESCRIPTOR_STRIDE(__values,0);
      if (delta == 0)
	delta = 1;
      
      if (unlikely (len < VALUES_SIZE))
	  runtime_error ("Incorrect extent in VALUE argument to"
			 " DATE_AND_TIME intrinsic: is %ld, should"
			 " be >=%ld", (long int) len, (long int) VALUES_SIZE);

      /* Cope with different type kinds.  */
      if (elt_size == 4)
        {
	  GFC_INTEGER_4 *vptr4 = __values->data;

	  for (i = 0; i < VALUES_SIZE; i++, vptr4 += delta)
	    *vptr4 = values[i];
	}
      else if (elt_size == 8)
        {
	  GFC_INTEGER_8 *vptr8 = (GFC_INTEGER_8 *)__values->data;

	  for (i = 0; i < VALUES_SIZE; i++, vptr8 += delta)
	    {
	      if (values[i] == - GFC_INTEGER_4_HUGE)
		*vptr8 = - GFC_INTEGER_8_HUGE;
	      else
		*vptr8 = values[i];
	    }
	}
      else 
	abort ();
    }

  if (__zone)
    fstrcpy (__zone, __zone_len, zone, ZONE_LEN);

  if (__time)
    fstrcpy (__time, __time_len, timec, TIME_LEN);

  if (__date)
    fstrcpy (__date, __date_len, date, DATE_LEN);
}


/* SECNDS (X) - Non-standard

   Description: Returns the system time of day, or elapsed time, as a GFC_REAL_4
   in seconds.

   Class: Non-elemental subroutine.

   Arguments:

   X must be REAL(4) and the result is of the same type.  The accuracy is system
   dependent.

   Usage:

	T = SECNDS (X)

   yields the time in elapsed seconds since X.  If X is 0.0, T is the time in
   seconds since midnight. Note that a time that spans midnight but is less than
   24hours will be calculated correctly.  */

extern GFC_REAL_4 secnds (GFC_REAL_4 *);
export_proto(secnds);

GFC_REAL_4
secnds (GFC_REAL_4 *x)
{
  GFC_INTEGER_4 values[VALUES_SIZE];
  GFC_REAL_4 temp1, temp2;

  /* Make the INTEGER*4 array for passing to date_and_time.  */
  gfc_array_i4 *avalues = internal_malloc_size (sizeof (gfc_array_i4));
  avalues->data = &values[0];
  GFC_DESCRIPTOR_DTYPE (avalues) = ((BT_REAL << GFC_DTYPE_TYPE_SHIFT)
				        & GFC_DTYPE_TYPE_MASK) +
				    (4 << GFC_DTYPE_SIZE_SHIFT);

  GFC_DIMENSION_SET(avalues->dim[0], 0, 7, 1);

  date_and_time (NULL, NULL, NULL, avalues, 0, 0, 0);

  free (avalues);

  temp1 = 3600.0 * (GFC_REAL_4)values[4] +
	    60.0 * (GFC_REAL_4)values[5] +
		   (GFC_REAL_4)values[6] +
	   0.001 * (GFC_REAL_4)values[7];
  temp2 = fmod (*x, 86400.0);
  temp2 = (temp1 - temp2 >= 0.0) ? temp2 : (temp2 - 86400.0);
  return temp1 - temp2;
}



/* ITIME(X) - Non-standard

   Description: Returns the current local time hour, minutes, and seconds
   in elements 1, 2, and 3 of X, respectively.  */

static void
itime0 (int x[3])
{
#ifndef HAVE_NO_DATE_TIME
  time_t lt;
  struct tm local_time;

  lt = time (NULL);

  if (lt != (time_t) -1)
    {
      localtime_r (&lt, &local_time);

      x[0] = local_time.tm_hour;
      x[1] = local_time.tm_min;
      x[2] = local_time.tm_sec;
    }
#else
  x[0] = x[1] = x[2] = -1;
#endif
}

extern void itime_i4 (gfc_array_i4 *);
export_proto(itime_i4);

void
itime_i4 (gfc_array_i4 *__values)
{
  int x[3], i;
  index_type len, delta;
  GFC_INTEGER_4 *vptr;
  
  /* Call helper function.  */
  itime0(x);

  /* Copy the value into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(__values,0);
  assert (len >= 3);
  delta = GFC_DESCRIPTOR_STRIDE(__values,0);
  if (delta == 0)
    delta = 1;

  vptr = __values->data;
  for (i = 0; i < 3; i++, vptr += delta)
    *vptr = x[i];
}


extern void itime_i8 (gfc_array_i8 *);
export_proto(itime_i8);

void
itime_i8 (gfc_array_i8 *__values)
{
  int x[3], i;
  index_type len, delta;
  GFC_INTEGER_8 *vptr;
  
  /* Call helper function.  */
  itime0(x);

  /* Copy the value into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(__values,0);
  assert (len >= 3);
  delta = GFC_DESCRIPTOR_STRIDE(__values,0);
  if (delta == 0)
    delta = 1;

  vptr = __values->data;
  for (i = 0; i < 3; i++, vptr += delta)
    *vptr = x[i];
}



/* IDATE(X) - Non-standard

   Description: Fills TArray with the numerical values at the current
   local time. The day (in the range 1-31), month (in the range 1-12),
   and year appear in elements 1, 2, and 3 of X, respectively.
   The year has four significant digits.  */

static void
idate0 (int x[3])
{
#ifndef HAVE_NO_DATE_TIME
  time_t lt;
  struct tm local_time;

  lt = time (NULL);

  if (lt != (time_t) -1)
    {
      localtime_r (&lt, &local_time);

      x[0] = local_time.tm_mday;
      x[1] = 1 + local_time.tm_mon;
      x[2] = 1900 + local_time.tm_year;
    }
#else
  x[0] = x[1] = x[2] = -1;
#endif
}

extern void idate_i4 (gfc_array_i4 *);
export_proto(idate_i4);

void
idate_i4 (gfc_array_i4 *__values)
{
  int x[3], i;
  index_type len, delta;
  GFC_INTEGER_4 *vptr;
  
  /* Call helper function.  */
  idate0(x);

  /* Copy the value into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(__values,0);
  assert (len >= 3);
  delta = GFC_DESCRIPTOR_STRIDE(__values,0);
  if (delta == 0)
    delta = 1;

  vptr = __values->data;
  for (i = 0; i < 3; i++, vptr += delta)
    *vptr = x[i];
}


extern void idate_i8 (gfc_array_i8 *);
export_proto(idate_i8);

void
idate_i8 (gfc_array_i8 *__values)
{
  int x[3], i;
  index_type len, delta;
  GFC_INTEGER_8 *vptr;
  
  /* Call helper function.  */
  idate0(x);

  /* Copy the value into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(__values,0);
  assert (len >= 3);
  delta = GFC_DESCRIPTOR_STRIDE(__values,0);
  if (delta == 0)
    delta = 1;

  vptr = __values->data;
  for (i = 0; i < 3; i++, vptr += delta)
    *vptr = x[i];
}



/* GMTIME(STIME, TARRAY) - Non-standard

   Description: Given a system time value STime, fills TArray with values
   extracted from it appropriate to the GMT time zone using gmtime_r(3).

   The array elements are as follows:

      1. Seconds after the minute, range 0-59 or 0-61 to allow for leap seconds
      2. Minutes after the hour, range 0-59
      3. Hours past midnight, range 0-23
      4. Day of month, range 0-31
      5. Number of months since January, range 0-11
      6. Years since 1900
      7. Number of days since Sunday, range 0-6
      8. Days since January 1
      9. Daylight savings indicator: positive if daylight savings is in effect,
         zero if not, and negative if the information isn't available.  */

static void
gmtime_0 (const time_t * t, int x[9])
{
  struct tm lt;

  gmtime_r (t, &lt);
  x[0] = lt.tm_sec;
  x[1] = lt.tm_min;
  x[2] = lt.tm_hour;
  x[3] = lt.tm_mday;
  x[4] = lt.tm_mon;
  x[5] = lt.tm_year;
  x[6] = lt.tm_wday;
  x[7] = lt.tm_yday;
  x[8] = lt.tm_isdst;
}

extern void gmtime_i4 (GFC_INTEGER_4 *, gfc_array_i4 *);
export_proto(gmtime_i4);

void
gmtime_i4 (GFC_INTEGER_4 * t, gfc_array_i4 * tarray)
{
  int x[9], i;
  index_type len, delta;
  GFC_INTEGER_4 *vptr;
  time_t tt;
  
  /* Call helper function.  */
  tt = (time_t) *t;
  gmtime_0(&tt, x);

  /* Copy the values into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(tarray,0);
  assert (len >= 9);
  delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
  if (delta == 0)
    delta = 1;

  vptr = tarray->data;
  for (i = 0; i < 9; i++, vptr += delta)
    *vptr = x[i];
}

extern void gmtime_i8 (GFC_INTEGER_8 *, gfc_array_i8 *);
export_proto(gmtime_i8);

void
gmtime_i8 (GFC_INTEGER_8 * t, gfc_array_i8 * tarray)
{
  int x[9], i;
  index_type len, delta;
  GFC_INTEGER_8 *vptr;
  time_t tt;
  
  /* Call helper function.  */
  tt = (time_t) *t;
  gmtime_0(&tt, x);

  /* Copy the values into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(tarray,0);
  assert (len >= 9);
  delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
  if (delta == 0)
    delta = 1;

  vptr = tarray->data;
  for (i = 0; i < 9; i++, vptr += delta)
    *vptr = x[i];
}




/* LTIME(STIME, TARRAY) - Non-standard

   Description: Given a system time value STime, fills TArray with values
   extracted from it appropriate to the local time zone using localtime_r(3).

   The array elements are as follows:

      1. Seconds after the minute, range 0-59 or 0-61 to allow for leap seconds
      2. Minutes after the hour, range 0-59
      3. Hours past midnight, range 0-23
      4. Day of month, range 0-31
      5. Number of months since January, range 0-11
      6. Years since 1900
      7. Number of days since Sunday, range 0-6
      8. Days since January 1
      9. Daylight savings indicator: positive if daylight savings is in effect,
         zero if not, and negative if the information isn't available.  */

static void
ltime_0 (const time_t * t, int x[9])
{
  struct tm lt;

  localtime_r (t, &lt);
  x[0] = lt.tm_sec;
  x[1] = lt.tm_min;
  x[2] = lt.tm_hour;
  x[3] = lt.tm_mday;
  x[4] = lt.tm_mon;
  x[5] = lt.tm_year;
  x[6] = lt.tm_wday;
  x[7] = lt.tm_yday;
  x[8] = lt.tm_isdst;
}

extern void ltime_i4 (GFC_INTEGER_4 *, gfc_array_i4 *);
export_proto(ltime_i4);

void
ltime_i4 (GFC_INTEGER_4 * t, gfc_array_i4 * tarray)
{
  int x[9], i;
  index_type len, delta;
  GFC_INTEGER_4 *vptr;
  time_t tt;
  
  /* Call helper function.  */
  tt = (time_t) *t;
  ltime_0(&tt, x);

  /* Copy the values into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(tarray,0);
  assert (len >= 9);
  delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
  if (delta == 0)
    delta = 1;

  vptr = tarray->data;
  for (i = 0; i < 9; i++, vptr += delta)
    *vptr = x[i];
}

extern void ltime_i8 (GFC_INTEGER_8 *, gfc_array_i8 *);
export_proto(ltime_i8);

void
ltime_i8 (GFC_INTEGER_8 * t, gfc_array_i8 * tarray)
{
  int x[9], i;
  index_type len, delta;
  GFC_INTEGER_8 *vptr;
  time_t tt;
  
  /* Call helper function.  */
  tt = (time_t) * t;
  ltime_0(&tt, x);

  /* Copy the values into the array.  */
  len = GFC_DESCRIPTOR_EXTENT(tarray,0);
  assert (len >= 9);
  delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
  if (delta == 0)
    delta = 1;

  vptr = tarray->data;
  for (i = 0; i < 9; i++, vptr += delta)
    *vptr = x[i];
}