1 /* Implementation of the DATE_AND_TIME intrinsic.
2 Copyright (C) 2003-2013 Free Software Foundation, Inc.
3 Contributed by Steven Bosscher.
5 This file is part of the GNU Fortran runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
34 /* If the re-entrant version of gmtime is not available, provide a
35 fallback implementation. On some targets where the _r version is
36 not available, gmtime uses thread-local storage so it's
40 /* If _POSIX is defined gmtime_r gets defined by mingw-w64 headers. */
46 gmtime_r (const time_t * timep, struct tm * result)
48 *result = *gmtime (timep);
54 /* DATE_AND_TIME ([DATE, TIME, ZONE, VALUES])
56 Description: Returns data on the real-time clock and date in a form
57 compatible with the representations defined in ISO 8601:1988.
59 Class: Non-elemental subroutine.
63 DATE (optional) shall be scalar and of type default character.
64 It is an INTENT(OUT) argument. It is assigned a value of the
65 form CCYYMMDD, where CC is the century, YY the year within the
66 century, MM the month within the year, and DD the day within the
67 month. If there is no date available, they are assigned blanks.
69 TIME (optional) shall be scalar and of type default character.
70 It is an INTENT(OUT) argument. It is assigned a value of the
71 form hhmmss.sss, where hh is the hour of the day, mm is the
72 minutes of the hour, and ss.sss is the seconds and milliseconds
73 of the minute. If there is no clock available, they are assigned
76 ZONE (optional) shall be scalar and of type default character.
77 It is an INTENT(OUT) argument. It is assigned a value of the
78 form [+-]hhmm, where hh and mm are the time difference with
79 respect to Coordinated Universal Time (UTC) in hours and parts
80 of an hour expressed in minutes, respectively. If there is no
81 clock available, they are assigned blanks.
83 VALUES (optional) shall be of type default integer and of rank
84 one. It is an INTENT(OUT) argument. Its size shall be at least
85 8. The values returned in VALUES are as follows:
87 VALUES(1) the year (for example, 2003), or -HUGE(0) if there is
90 VALUES(2) the month of the year, or -HUGE(0) if there
93 VALUES(3) the day of the month, or -HUGE(0) if there is no date
96 VALUES(4) the time difference with respect to Coordinated
97 Universal Time (UTC) in minutes, or -HUGE(0) if this information
100 VALUES(5) the hour of the day, in the range of 0 to 23, or
101 -HUGE(0) if there is no clock;
103 VALUES(6) the minutes of the hour, in the range 0 to 59, or
104 -HUGE(0) if there is no clock;
106 VALUES(7) the seconds of the minute, in the range 0 to 60, or
107 -HUGE(0) if there is no clock;
109 VALUES(8) the milliseconds of the second, in the range 0 to
110 999, or -HUGE(0) if there is no clock.
112 NULL pointer represent missing OPTIONAL arguments. All arguments
113 have INTENT(OUT). Because of the -i8 option, we must implement
114 VALUES for INTEGER(kind=4) and INTEGER(kind=8).
116 Based on libU77's date_time_.c.
119 - Check year boundaries.
124 #define VALUES_SIZE 8
126 extern void date_and_time (char *, char *, char *, gfc_array_i4 *,
127 GFC_INTEGER_4, GFC_INTEGER_4, GFC_INTEGER_4);
128 export_proto(date_and_time);
131 date_and_time (char *__date, char *__time, char *__zone,
132 gfc_array_i4 *__values, GFC_INTEGER_4 __date_len,
133 GFC_INTEGER_4 __time_len, GFC_INTEGER_4 __zone_len)
136 char date[DATE_LEN + 1];
137 char timec[TIME_LEN + 1];
138 char zone[ZONE_LEN + 1];
139 GFC_INTEGER_4 values[VALUES_SIZE];
142 struct tm local_time;
147 if (!gf_gettime (<, &usecs))
149 values[7] = usecs / 1000;
151 localtime_r (<, &local_time);
152 gmtime_r (<, &UTC_time);
154 /* All arguments can be derived from VALUES. */
155 values[0] = 1900 + local_time.tm_year;
156 values[1] = 1 + local_time.tm_mon;
157 values[2] = local_time.tm_mday;
158 values[3] = (local_time.tm_min - UTC_time.tm_min +
159 60 * (local_time.tm_hour - UTC_time.tm_hour +
160 24 * (local_time.tm_yday - UTC_time.tm_yday)));
161 values[4] = local_time.tm_hour;
162 values[5] = local_time.tm_min;
163 values[6] = local_time.tm_sec;
166 snprintf (date, DATE_LEN + 1, "%04d%02d%02d",
167 values[0], values[1], values[2]);
169 snprintf (timec, TIME_LEN + 1, "%02d%02d%02d.%03d",
170 values[4], values[5], values[6], values[7]);
173 snprintf (zone, ZONE_LEN + 1, "%+03d%02d",
174 values[3] / 60, abs (values[3] % 60));
178 memset (date, ' ', DATE_LEN);
179 date[DATE_LEN] = '\0';
181 memset (timec, ' ', TIME_LEN);
182 timec[TIME_LEN] = '\0';
184 memset (zone, ' ', ZONE_LEN);
185 zone[ZONE_LEN] = '\0';
187 for (i = 0; i < VALUES_SIZE; i++)
188 values[i] = - GFC_INTEGER_4_HUGE;
191 /* Copy the values into the arguments. */
194 index_type len, delta, elt_size;
196 elt_size = GFC_DESCRIPTOR_SIZE (__values);
197 len = GFC_DESCRIPTOR_EXTENT(__values,0);
198 delta = GFC_DESCRIPTOR_STRIDE(__values,0);
202 if (unlikely (len < VALUES_SIZE))
203 runtime_error ("Incorrect extent in VALUE argument to"
204 " DATE_AND_TIME intrinsic: is %ld, should"
205 " be >=%ld", (long int) len, (long int) VALUES_SIZE);
207 /* Cope with different type kinds. */
210 GFC_INTEGER_4 *vptr4 = __values->base_addr;
212 for (i = 0; i < VALUES_SIZE; i++, vptr4 += delta)
215 else if (elt_size == 8)
217 GFC_INTEGER_8 *vptr8 = (GFC_INTEGER_8 *)__values->base_addr;
219 for (i = 0; i < VALUES_SIZE; i++, vptr8 += delta)
221 if (values[i] == - GFC_INTEGER_4_HUGE)
222 *vptr8 = - GFC_INTEGER_8_HUGE;
232 fstrcpy (__zone, __zone_len, zone, ZONE_LEN);
235 fstrcpy (__time, __time_len, timec, TIME_LEN);
238 fstrcpy (__date, __date_len, date, DATE_LEN);
242 /* SECNDS (X) - Non-standard
244 Description: Returns the system time of day, or elapsed time, as a GFC_REAL_4
247 Class: Non-elemental subroutine.
251 X must be REAL(4) and the result is of the same type. The accuracy is system
258 yields the time in elapsed seconds since X. If X is 0.0, T is the time in
259 seconds since midnight. Note that a time that spans midnight but is less than
260 24hours will be calculated correctly. */
262 extern GFC_REAL_4 secnds (GFC_REAL_4 *);
263 export_proto(secnds);
266 secnds (GFC_REAL_4 *x)
268 GFC_INTEGER_4 values[VALUES_SIZE];
269 GFC_REAL_4 temp1, temp2;
271 /* Make the INTEGER*4 array for passing to date_and_time. */
272 gfc_array_i4 *avalues = xmalloc (sizeof (gfc_array_i4));
273 avalues->base_addr = &values[0];
274 GFC_DESCRIPTOR_DTYPE (avalues) = ((BT_REAL << GFC_DTYPE_TYPE_SHIFT)
275 & GFC_DTYPE_TYPE_MASK) +
276 (4 << GFC_DTYPE_SIZE_SHIFT);
278 GFC_DIMENSION_SET(avalues->dim[0], 0, 7, 1);
280 date_and_time (NULL, NULL, NULL, avalues, 0, 0, 0);
284 temp1 = 3600.0 * (GFC_REAL_4)values[4] +
285 60.0 * (GFC_REAL_4)values[5] +
286 (GFC_REAL_4)values[6] +
287 0.001 * (GFC_REAL_4)values[7];
288 temp2 = fmod (*x, 86400.0);
289 temp2 = (temp1 - temp2 >= 0.0) ? temp2 : (temp2 - 86400.0);
290 return temp1 - temp2;
295 /* ITIME(X) - Non-standard
297 Description: Returns the current local time hour, minutes, and seconds
298 in elements 1, 2, and 3 of X, respectively. */
304 struct tm local_time;
308 if (lt != (time_t) -1)
310 localtime_r (<, &local_time);
312 x[0] = local_time.tm_hour;
313 x[1] = local_time.tm_min;
314 x[2] = local_time.tm_sec;
318 extern void itime_i4 (gfc_array_i4 *);
319 export_proto(itime_i4);
322 itime_i4 (gfc_array_i4 *__values)
325 index_type len, delta;
328 /* Call helper function. */
331 /* Copy the value into the array. */
332 len = GFC_DESCRIPTOR_EXTENT(__values,0);
334 delta = GFC_DESCRIPTOR_STRIDE(__values,0);
338 vptr = __values->base_addr;
339 for (i = 0; i < 3; i++, vptr += delta)
344 extern void itime_i8 (gfc_array_i8 *);
345 export_proto(itime_i8);
348 itime_i8 (gfc_array_i8 *__values)
351 index_type len, delta;
354 /* Call helper function. */
357 /* Copy the value into the array. */
358 len = GFC_DESCRIPTOR_EXTENT(__values,0);
360 delta = GFC_DESCRIPTOR_STRIDE(__values,0);
364 vptr = __values->base_addr;
365 for (i = 0; i < 3; i++, vptr += delta)
371 /* IDATE(X) - Non-standard
373 Description: Fills TArray with the numerical values at the current
374 local time. The day (in the range 1-31), month (in the range 1-12),
375 and year appear in elements 1, 2, and 3 of X, respectively.
376 The year has four significant digits. */
382 struct tm local_time;
386 if (lt != (time_t) -1)
388 localtime_r (<, &local_time);
390 x[0] = local_time.tm_mday;
391 x[1] = 1 + local_time.tm_mon;
392 x[2] = 1900 + local_time.tm_year;
396 extern void idate_i4 (gfc_array_i4 *);
397 export_proto(idate_i4);
400 idate_i4 (gfc_array_i4 *__values)
403 index_type len, delta;
406 /* Call helper function. */
409 /* Copy the value into the array. */
410 len = GFC_DESCRIPTOR_EXTENT(__values,0);
412 delta = GFC_DESCRIPTOR_STRIDE(__values,0);
416 vptr = __values->base_addr;
417 for (i = 0; i < 3; i++, vptr += delta)
422 extern void idate_i8 (gfc_array_i8 *);
423 export_proto(idate_i8);
426 idate_i8 (gfc_array_i8 *__values)
429 index_type len, delta;
432 /* Call helper function. */
435 /* Copy the value into the array. */
436 len = GFC_DESCRIPTOR_EXTENT(__values,0);
438 delta = GFC_DESCRIPTOR_STRIDE(__values,0);
442 vptr = __values->base_addr;
443 for (i = 0; i < 3; i++, vptr += delta)
449 /* GMTIME(STIME, TARRAY) - Non-standard
451 Description: Given a system time value STime, fills TArray with values
452 extracted from it appropriate to the GMT time zone using gmtime_r(3).
454 The array elements are as follows:
456 1. Seconds after the minute, range 0-59 or 0-61 to allow for leap seconds
457 2. Minutes after the hour, range 0-59
458 3. Hours past midnight, range 0-23
459 4. Day of month, range 0-31
460 5. Number of months since January, range 0-11
462 7. Number of days since Sunday, range 0-6
463 8. Days since January 1
464 9. Daylight savings indicator: positive if daylight savings is in effect,
465 zero if not, and negative if the information isn't available. */
468 gmtime_0 (const time_t * t, int x[9])
484 extern void gmtime_i4 (GFC_INTEGER_4 *, gfc_array_i4 *);
485 export_proto(gmtime_i4);
488 gmtime_i4 (GFC_INTEGER_4 * t, gfc_array_i4 * tarray)
491 index_type len, delta;
495 /* Call helper function. */
499 /* Copy the values into the array. */
500 len = GFC_DESCRIPTOR_EXTENT(tarray,0);
502 delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
506 vptr = tarray->base_addr;
507 for (i = 0; i < 9; i++, vptr += delta)
511 extern void gmtime_i8 (GFC_INTEGER_8 *, gfc_array_i8 *);
512 export_proto(gmtime_i8);
515 gmtime_i8 (GFC_INTEGER_8 * t, gfc_array_i8 * tarray)
518 index_type len, delta;
522 /* Call helper function. */
526 /* Copy the values into the array. */
527 len = GFC_DESCRIPTOR_EXTENT(tarray,0);
529 delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
533 vptr = tarray->base_addr;
534 for (i = 0; i < 9; i++, vptr += delta)
541 /* LTIME(STIME, TARRAY) - Non-standard
543 Description: Given a system time value STime, fills TArray with values
544 extracted from it appropriate to the local time zone using localtime_r(3).
546 The array elements are as follows:
548 1. Seconds after the minute, range 0-59 or 0-61 to allow for leap seconds
549 2. Minutes after the hour, range 0-59
550 3. Hours past midnight, range 0-23
551 4. Day of month, range 0-31
552 5. Number of months since January, range 0-11
554 7. Number of days since Sunday, range 0-6
555 8. Days since January 1
556 9. Daylight savings indicator: positive if daylight savings is in effect,
557 zero if not, and negative if the information isn't available. */
560 ltime_0 (const time_t * t, int x[9])
564 localtime_r (t, <);
576 extern void ltime_i4 (GFC_INTEGER_4 *, gfc_array_i4 *);
577 export_proto(ltime_i4);
580 ltime_i4 (GFC_INTEGER_4 * t, gfc_array_i4 * tarray)
583 index_type len, delta;
587 /* Call helper function. */
591 /* Copy the values into the array. */
592 len = GFC_DESCRIPTOR_EXTENT(tarray,0);
594 delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
598 vptr = tarray->base_addr;
599 for (i = 0; i < 9; i++, vptr += delta)
603 extern void ltime_i8 (GFC_INTEGER_8 *, gfc_array_i8 *);
604 export_proto(ltime_i8);
607 ltime_i8 (GFC_INTEGER_8 * t, gfc_array_i8 * tarray)
610 index_type len, delta;
614 /* Call helper function. */
618 /* Copy the values into the array. */
619 len = GFC_DESCRIPTOR_EXTENT(tarray,0);
621 delta = GFC_DESCRIPTOR_STRIDE(tarray,0);
625 vptr = tarray->base_addr;
626 for (i = 0; i < 9; i++, vptr += delta)