Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * datetime.c
4 : * Support functions for date/time types.
5 : *
6 : * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : *
10 : * IDENTIFICATION
11 : * src/backend/utils/adt/datetime.c
12 : *
13 : *-------------------------------------------------------------------------
14 : */
15 : #include "postgres.h"
16 :
17 : #include <ctype.h>
18 : #include <limits.h>
19 : #include <math.h>
20 :
21 : #include "access/htup_details.h"
22 : #include "access/xact.h"
23 : #include "common/int.h"
24 : #include "common/string.h"
25 : #include "funcapi.h"
26 : #include "miscadmin.h"
27 : #include "nodes/nodeFuncs.h"
28 : #include "parser/scansup.h"
29 : #include "utils/builtins.h"
30 : #include "utils/date.h"
31 : #include "utils/datetime.h"
32 : #include "utils/guc.h"
33 : #include "utils/tzparser.h"
34 :
35 : static int DecodeNumber(int flen, char *str, bool haveTextMonth,
36 : int fmask, int *tmask,
37 : struct pg_tm *tm, fsec_t *fsec, bool *is2digits);
38 : static int DecodeNumberField(int len, char *str,
39 : int fmask, int *tmask,
40 : struct pg_tm *tm, fsec_t *fsec, bool *is2digits);
41 : static int DecodeTimeCommon(char *str, int fmask, int range,
42 : int *tmask, struct pg_itm *itm);
43 : static int DecodeTime(char *str, int fmask, int range,
44 : int *tmask, struct pg_tm *tm, fsec_t *fsec);
45 : static int DecodeTimeForInterval(char *str, int fmask, int range,
46 : int *tmask, struct pg_itm_in *itm_in);
47 : static const datetkn *datebsearch(const char *key, const datetkn *base, int nel);
48 : static int DecodeDate(char *str, int fmask, int *tmask, bool *is2digits,
49 : struct pg_tm *tm);
50 : static char *AppendSeconds(char *cp, int sec, fsec_t fsec,
51 : int precision, bool fillzeros);
52 : static bool int64_multiply_add(int64 val, int64 multiplier, int64 *sum);
53 : static bool AdjustFractMicroseconds(double frac, int64 scale,
54 : struct pg_itm_in *itm_in);
55 : static bool AdjustFractDays(double frac, int scale,
56 : struct pg_itm_in *itm_in);
57 : static bool AdjustFractYears(double frac, int scale,
58 : struct pg_itm_in *itm_in);
59 : static bool AdjustMicroseconds(int64 val, double fval, int64 scale,
60 : struct pg_itm_in *itm_in);
61 : static bool AdjustDays(int64 val, int scale,
62 : struct pg_itm_in *itm_in);
63 : static bool AdjustMonths(int64 val, struct pg_itm_in *itm_in);
64 : static bool AdjustYears(int64 val, int scale,
65 : struct pg_itm_in *itm_in);
66 : static int DetermineTimeZoneOffsetInternal(struct pg_tm *tm, pg_tz *tzp,
67 : pg_time_t *tp);
68 : static bool DetermineTimeZoneAbbrevOffsetInternal(pg_time_t t,
69 : const char *abbr, pg_tz *tzp,
70 : int *offset, int *isdst);
71 : static pg_tz *FetchDynamicTimeZone(TimeZoneAbbrevTable *tbl, const datetkn *tp,
72 : DateTimeErrorExtra *extra);
73 :
74 :
75 : const int day_tab[2][13] =
76 : {
77 : {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0},
78 : {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0}
79 : };
80 :
81 : const char *const months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
82 : "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL};
83 :
84 : const char *const days[] = {"Sunday", "Monday", "Tuesday", "Wednesday",
85 : "Thursday", "Friday", "Saturday", NULL};
86 :
87 :
88 : /*****************************************************************************
89 : * PRIVATE ROUTINES *
90 : *****************************************************************************/
91 :
92 : /*
93 : * datetktbl holds date/time keywords.
94 : *
95 : * Note that this table must be strictly alphabetically ordered to allow an
96 : * O(ln(N)) search algorithm to be used.
97 : *
98 : * The token field must be NUL-terminated; we truncate entries to TOKMAXLEN
99 : * characters to fit.
100 : *
101 : * The static table contains no TZ, DTZ, or DYNTZ entries; rather those
102 : * are loaded from configuration files and stored in zoneabbrevtbl, whose
103 : * abbrevs[] field has the same format as the static datetktbl.
104 : */
105 : static const datetkn datetktbl[] = {
106 : /* token, type, value */
107 : {"+infinity", RESERV, DTK_LATE}, /* same as "infinity" */
108 : {EARLY, RESERV, DTK_EARLY}, /* "-infinity" reserved for "early time" */
109 : {DA_D, ADBC, AD}, /* "ad" for years > 0 */
110 : {"allballs", RESERV, DTK_ZULU}, /* 00:00:00 */
111 : {"am", AMPM, AM},
112 : {"apr", MONTH, 4},
113 : {"april", MONTH, 4},
114 : {"at", IGNORE_DTF, 0}, /* "at" (throwaway) */
115 : {"aug", MONTH, 8},
116 : {"august", MONTH, 8},
117 : {DB_C, ADBC, BC}, /* "bc" for years <= 0 */
118 : {"d", UNITS, DTK_DAY}, /* "day of month" for ISO input */
119 : {"dec", MONTH, 12},
120 : {"december", MONTH, 12},
121 : {"dow", UNITS, DTK_DOW}, /* day of week */
122 : {"doy", UNITS, DTK_DOY}, /* day of year */
123 : {"dst", DTZMOD, SECS_PER_HOUR},
124 : {EPOCH, RESERV, DTK_EPOCH}, /* "epoch" reserved for system epoch time */
125 : {"feb", MONTH, 2},
126 : {"february", MONTH, 2},
127 : {"fri", DOW, 5},
128 : {"friday", DOW, 5},
129 : {"h", UNITS, DTK_HOUR}, /* "hour" */
130 : {LATE, RESERV, DTK_LATE}, /* "infinity" reserved for "late time" */
131 : {"isodow", UNITS, DTK_ISODOW}, /* ISO day of week, Sunday == 7 */
132 : {"isoyear", UNITS, DTK_ISOYEAR}, /* year in terms of the ISO week date */
133 : {"j", UNITS, DTK_JULIAN},
134 : {"jan", MONTH, 1},
135 : {"january", MONTH, 1},
136 : {"jd", UNITS, DTK_JULIAN},
137 : {"jul", MONTH, 7},
138 : {"julian", UNITS, DTK_JULIAN},
139 : {"july", MONTH, 7},
140 : {"jun", MONTH, 6},
141 : {"june", MONTH, 6},
142 : {"m", UNITS, DTK_MONTH}, /* "month" for ISO input */
143 : {"mar", MONTH, 3},
144 : {"march", MONTH, 3},
145 : {"may", MONTH, 5},
146 : {"mm", UNITS, DTK_MINUTE}, /* "minute" for ISO input */
147 : {"mon", DOW, 1},
148 : {"monday", DOW, 1},
149 : {"nov", MONTH, 11},
150 : {"november", MONTH, 11},
151 : {NOW, RESERV, DTK_NOW}, /* current transaction time */
152 : {"oct", MONTH, 10},
153 : {"october", MONTH, 10},
154 : {"on", IGNORE_DTF, 0}, /* "on" (throwaway) */
155 : {"pm", AMPM, PM},
156 : {"s", UNITS, DTK_SECOND}, /* "seconds" for ISO input */
157 : {"sat", DOW, 6},
158 : {"saturday", DOW, 6},
159 : {"sep", MONTH, 9},
160 : {"sept", MONTH, 9},
161 : {"september", MONTH, 9},
162 : {"sun", DOW, 0},
163 : {"sunday", DOW, 0},
164 : {"t", ISOTIME, DTK_TIME}, /* Filler for ISO time fields */
165 : {"thu", DOW, 4},
166 : {"thur", DOW, 4},
167 : {"thurs", DOW, 4},
168 : {"thursday", DOW, 4},
169 : {TODAY, RESERV, DTK_TODAY}, /* midnight */
170 : {TOMORROW, RESERV, DTK_TOMORROW}, /* tomorrow midnight */
171 : {"tue", DOW, 2},
172 : {"tues", DOW, 2},
173 : {"tuesday", DOW, 2},
174 : {"wed", DOW, 3},
175 : {"wednesday", DOW, 3},
176 : {"weds", DOW, 3},
177 : {"y", UNITS, DTK_YEAR}, /* "year" for ISO input */
178 : {YESTERDAY, RESERV, DTK_YESTERDAY} /* yesterday midnight */
179 : };
180 :
181 : static const int szdatetktbl = sizeof datetktbl / sizeof datetktbl[0];
182 :
183 : /*
184 : * deltatktbl: same format as datetktbl, but holds keywords used to represent
185 : * time units (eg, for intervals, and for EXTRACT).
186 : */
187 : static const datetkn deltatktbl[] = {
188 : /* token, type, value */
189 : {"@", IGNORE_DTF, 0}, /* postgres relative prefix */
190 : {DAGO, AGO, 0}, /* "ago" indicates negative time offset */
191 : {"c", UNITS, DTK_CENTURY}, /* "century" relative */
192 : {"cent", UNITS, DTK_CENTURY}, /* "century" relative */
193 : {"centuries", UNITS, DTK_CENTURY}, /* "centuries" relative */
194 : {DCENTURY, UNITS, DTK_CENTURY}, /* "century" relative */
195 : {"d", UNITS, DTK_DAY}, /* "day" relative */
196 : {DDAY, UNITS, DTK_DAY}, /* "day" relative */
197 : {"days", UNITS, DTK_DAY}, /* "days" relative */
198 : {"dec", UNITS, DTK_DECADE}, /* "decade" relative */
199 : {DDECADE, UNITS, DTK_DECADE}, /* "decade" relative */
200 : {"decades", UNITS, DTK_DECADE}, /* "decades" relative */
201 : {"decs", UNITS, DTK_DECADE}, /* "decades" relative */
202 : {"h", UNITS, DTK_HOUR}, /* "hour" relative */
203 : {DHOUR, UNITS, DTK_HOUR}, /* "hour" relative */
204 : {"hours", UNITS, DTK_HOUR}, /* "hours" relative */
205 : {"hr", UNITS, DTK_HOUR}, /* "hour" relative */
206 : {"hrs", UNITS, DTK_HOUR}, /* "hours" relative */
207 : {"m", UNITS, DTK_MINUTE}, /* "minute" relative */
208 : {"microsecon", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
209 : {"mil", UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
210 : {"millennia", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
211 : {DMILLENNIUM, UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
212 : {"millisecon", UNITS, DTK_MILLISEC}, /* relative */
213 : {"mils", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
214 : {"min", UNITS, DTK_MINUTE}, /* "minute" relative */
215 : {"mins", UNITS, DTK_MINUTE}, /* "minutes" relative */
216 : {DMINUTE, UNITS, DTK_MINUTE}, /* "minute" relative */
217 : {"minutes", UNITS, DTK_MINUTE}, /* "minutes" relative */
218 : {"mon", UNITS, DTK_MONTH}, /* "months" relative */
219 : {"mons", UNITS, DTK_MONTH}, /* "months" relative */
220 : {DMONTH, UNITS, DTK_MONTH}, /* "month" relative */
221 : {"months", UNITS, DTK_MONTH},
222 : {"ms", UNITS, DTK_MILLISEC},
223 : {"msec", UNITS, DTK_MILLISEC},
224 : {DMILLISEC, UNITS, DTK_MILLISEC},
225 : {"mseconds", UNITS, DTK_MILLISEC},
226 : {"msecs", UNITS, DTK_MILLISEC},
227 : {"qtr", UNITS, DTK_QUARTER}, /* "quarter" relative */
228 : {DQUARTER, UNITS, DTK_QUARTER}, /* "quarter" relative */
229 : {"s", UNITS, DTK_SECOND},
230 : {"sec", UNITS, DTK_SECOND},
231 : {DSECOND, UNITS, DTK_SECOND},
232 : {"seconds", UNITS, DTK_SECOND},
233 : {"secs", UNITS, DTK_SECOND},
234 : {DTIMEZONE, UNITS, DTK_TZ}, /* "timezone" time offset */
235 : {"timezone_h", UNITS, DTK_TZ_HOUR}, /* timezone hour units */
236 : {"timezone_m", UNITS, DTK_TZ_MINUTE}, /* timezone minutes units */
237 : {"us", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
238 : {"usec", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
239 : {DMICROSEC, UNITS, DTK_MICROSEC}, /* "microsecond" relative */
240 : {"useconds", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
241 : {"usecs", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
242 : {"w", UNITS, DTK_WEEK}, /* "week" relative */
243 : {DWEEK, UNITS, DTK_WEEK}, /* "week" relative */
244 : {"weeks", UNITS, DTK_WEEK}, /* "weeks" relative */
245 : {"y", UNITS, DTK_YEAR}, /* "year" relative */
246 : {DYEAR, UNITS, DTK_YEAR}, /* "year" relative */
247 : {"years", UNITS, DTK_YEAR}, /* "years" relative */
248 : {"yr", UNITS, DTK_YEAR}, /* "year" relative */
249 : {"yrs", UNITS, DTK_YEAR} /* "years" relative */
250 : };
251 :
252 : static const int szdeltatktbl = sizeof deltatktbl / sizeof deltatktbl[0];
253 :
254 : static TimeZoneAbbrevTable *zoneabbrevtbl = NULL;
255 :
256 : /* Caches of recent lookup results in the above tables */
257 :
258 : static const datetkn *datecache[MAXDATEFIELDS] = {NULL};
259 :
260 : static const datetkn *deltacache[MAXDATEFIELDS] = {NULL};
261 :
262 : /* Cache for results of timezone abbreviation lookups */
263 :
264 : typedef struct TzAbbrevCache
265 : {
266 : char abbrev[TOKMAXLEN + 1]; /* always NUL-terminated */
267 : char ftype; /* TZ, DTZ, or DYNTZ */
268 : int offset; /* GMT offset, if fixed-offset */
269 : pg_tz *tz; /* relevant zone, if variable-offset */
270 : } TzAbbrevCache;
271 :
272 : static TzAbbrevCache tzabbrevcache[MAXDATEFIELDS];
273 :
274 :
275 : /*
276 : * Calendar time to Julian date conversions.
277 : * Julian date is commonly used in astronomical applications,
278 : * since it is numerically accurate and computationally simple.
279 : * The algorithms here will accurately convert between Julian day
280 : * and calendar date for all non-negative Julian days
281 : * (i.e. from Nov 24, -4713 on).
282 : *
283 : * Rewritten to eliminate overflow problems. This now allows the
284 : * routines to work correctly for all Julian day counts from
285 : * 0 to 2147483647 (Nov 24, -4713 to Jun 3, 5874898) assuming
286 : * a 32-bit integer. Longer types should also work to the limits
287 : * of their precision.
288 : *
289 : * Actually, date2j() will work sanely, in the sense of producing
290 : * valid negative Julian dates, significantly before Nov 24, -4713.
291 : * We rely on it to do so back to Nov 1, -4713; see IS_VALID_JULIAN()
292 : * and associated commentary in timestamp.h.
293 : */
294 :
295 : int
296 230675 : date2j(int year, int month, int day)
297 : {
298 : int julian;
299 : int century;
300 :
301 230675 : if (month > 2)
302 : {
303 149482 : month += 1;
304 149482 : year += 4800;
305 : }
306 : else
307 : {
308 81193 : month += 13;
309 81193 : year += 4799;
310 : }
311 :
312 230675 : century = year / 100;
313 230675 : julian = year * 365 - 32167;
314 230675 : julian += year / 4 - century + century / 4;
315 230675 : julian += 7834 * month / 256 + day;
316 :
317 230675 : return julian;
318 : } /* date2j() */
319 :
320 : void
321 168649 : j2date(int jd, int *year, int *month, int *day)
322 : {
323 : unsigned int julian;
324 : unsigned int quad;
325 : unsigned int extra;
326 : int y;
327 :
328 168649 : julian = jd;
329 168649 : julian += 32044;
330 168649 : quad = julian / 146097;
331 168649 : extra = (julian - quad * 146097) * 4 + 3;
332 168649 : julian += 60 + quad * 3 + extra / 146097;
333 168649 : quad = julian / 1461;
334 168649 : julian -= quad * 1461;
335 168649 : y = julian * 4 / 1461;
336 337298 : julian = ((y != 0) ? ((julian + 305) % 365) : ((julian + 306) % 366))
337 168649 : + 123;
338 168649 : y += quad * 4;
339 168649 : *year = y - 4800;
340 168649 : quad = julian * 2141 / 65536;
341 168649 : *day = julian - 7834 * quad / 256;
342 168649 : *month = (quad + 10) % MONTHS_PER_YEAR + 1;
343 168649 : } /* j2date() */
344 :
345 :
346 : /*
347 : * j2day - convert Julian date to day-of-week (0..6 == Sun..Sat)
348 : *
349 : * Note: various places use the locution j2day(date - 1) to produce a
350 : * result according to the convention 0..6 = Mon..Sun. This is a bit of
351 : * a crock, but will work as long as the computation here is just a modulo.
352 : */
353 : int
354 26087 : j2day(int date)
355 : {
356 26087 : date += 1;
357 26087 : date %= 7;
358 : /* Cope if division truncates towards zero, as it probably does */
359 26087 : if (date < 0)
360 0 : date += 7;
361 :
362 26087 : return date;
363 : } /* j2day() */
364 :
365 :
366 : /*
367 : * GetCurrentDateTime()
368 : *
369 : * Get the transaction start time ("now()") broken down as a struct pg_tm,
370 : * converted according to the session timezone setting.
371 : *
372 : * This is just a convenience wrapper for GetCurrentTimeUsec, to cover the
373 : * case where caller doesn't need either fractional seconds or tz offset.
374 : */
375 : void
376 1405 : GetCurrentDateTime(struct pg_tm *tm)
377 : {
378 : fsec_t fsec;
379 :
380 1405 : GetCurrentTimeUsec(tm, &fsec, NULL);
381 1405 : }
382 :
383 : /*
384 : * GetCurrentTimeUsec()
385 : *
386 : * Get the transaction start time ("now()") broken down as a struct pg_tm,
387 : * including fractional seconds and timezone offset. The time is converted
388 : * according to the session timezone setting.
389 : *
390 : * Callers may pass tzp = NULL if they don't need the offset, but this does
391 : * not affect the conversion behavior (unlike timestamp2tm()).
392 : *
393 : * Internally, we cache the result, since this could be called many times
394 : * in a transaction, within which now() doesn't change.
395 : */
396 : void
397 1492 : GetCurrentTimeUsec(struct pg_tm *tm, fsec_t *fsec, int *tzp)
398 : {
399 1492 : TimestampTz cur_ts = GetCurrentTransactionStartTimestamp();
400 :
401 : /*
402 : * The cache key must include both current time and current timezone. By
403 : * representing the timezone by just a pointer, we're assuming that
404 : * distinct timezone settings could never have the same pointer value.
405 : * This is true by virtue of the hashtable used inside pg_tzset();
406 : * however, it might need another look if we ever allow entries in that
407 : * hash to be recycled.
408 : */
409 : static TimestampTz cache_ts = 0;
410 : static pg_tz *cache_timezone = NULL;
411 : static struct pg_tm cache_tm;
412 : static fsec_t cache_fsec;
413 : static int cache_tz;
414 :
415 1492 : if (cur_ts != cache_ts || session_timezone != cache_timezone)
416 : {
417 : /*
418 : * Make sure cache is marked invalid in case of error after partial
419 : * update within timestamp2tm.
420 : */
421 482 : cache_timezone = NULL;
422 :
423 : /*
424 : * Perform the computation, storing results into cache. We do not
425 : * really expect any error here, since current time surely ought to be
426 : * within range, but check just for sanity's sake.
427 : */
428 482 : if (timestamp2tm(cur_ts, &cache_tz, &cache_tm, &cache_fsec,
429 : NULL, session_timezone) != 0)
430 0 : ereport(ERROR,
431 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
432 : errmsg("timestamp out of range")));
433 :
434 : /* OK, so mark the cache valid. */
435 482 : cache_ts = cur_ts;
436 482 : cache_timezone = session_timezone;
437 : }
438 :
439 1492 : *tm = cache_tm;
440 1492 : *fsec = cache_fsec;
441 1492 : if (tzp != NULL)
442 81 : *tzp = cache_tz;
443 1492 : }
444 :
445 :
446 : /*
447 : * Append seconds and fractional seconds (if any) at *cp.
448 : *
449 : * precision is the max number of fraction digits, fillzeros says to
450 : * pad to two integral-seconds digits.
451 : *
452 : * Returns a pointer to the new end of string. No NUL terminator is put
453 : * there; callers are responsible for NUL terminating str themselves.
454 : *
455 : * Note that any sign is stripped from the input sec and fsec values.
456 : */
457 : static char *
458 69683 : AppendSeconds(char *cp, int sec, fsec_t fsec, int precision, bool fillzeros)
459 : {
460 : Assert(precision >= 0);
461 :
462 69683 : if (fillzeros)
463 68024 : cp = pg_ultostr_zeropad(cp, abs(sec), 2);
464 : else
465 1659 : cp = pg_ultostr(cp, abs(sec));
466 :
467 : /* fsec_t is just an int32 */
468 69683 : if (fsec != 0)
469 : {
470 11691 : int32 value = abs(fsec);
471 11691 : char *end = &cp[precision + 1];
472 11691 : bool gotnonzero = false;
473 :
474 11691 : *cp++ = '.';
475 :
476 : /*
477 : * Append the fractional seconds part. Note that we don't want any
478 : * trailing zeros here, so since we're building the number in reverse
479 : * we'll skip appending zeros until we've output a non-zero digit.
480 : */
481 81837 : while (precision--)
482 : {
483 70146 : int32 oldval = value;
484 : int32 remainder;
485 :
486 70146 : value /= 10;
487 70146 : remainder = oldval - value * 10;
488 :
489 : /* check if we got a non-zero */
490 70146 : if (remainder)
491 51800 : gotnonzero = true;
492 :
493 70146 : if (gotnonzero)
494 60384 : cp[precision] = '0' + remainder;
495 : else
496 9762 : end = &cp[precision];
497 : }
498 :
499 : /*
500 : * If we still have a non-zero value then precision must have not been
501 : * enough to print the number. We punt the problem to pg_ultostr(),
502 : * which will generate a correct answer in the minimum valid width.
503 : */
504 11691 : if (value)
505 0 : return pg_ultostr(cp, abs(fsec));
506 :
507 11691 : return end;
508 : }
509 : else
510 57992 : return cp;
511 : }
512 :
513 :
514 : /*
515 : * Variant of above that's specialized to timestamp case.
516 : *
517 : * Returns a pointer to the new end of string. No NUL terminator is put
518 : * there; callers are responsible for NUL terminating str themselves.
519 : */
520 : static char *
521 58690 : AppendTimestampSeconds(char *cp, struct pg_tm *tm, fsec_t fsec)
522 : {
523 58690 : return AppendSeconds(cp, tm->tm_sec, fsec, MAX_TIMESTAMP_PRECISION, true);
524 : }
525 :
526 :
527 : /*
528 : * Add val * multiplier to *sum.
529 : * Returns true if successful, false on overflow.
530 : */
531 : static bool
532 4389 : int64_multiply_add(int64 val, int64 multiplier, int64 *sum)
533 : {
534 : int64 product;
535 :
536 8748 : if (pg_mul_s64_overflow(val, multiplier, &product) ||
537 4359 : pg_add_s64_overflow(*sum, product, sum))
538 78 : return false;
539 4311 : return true;
540 : }
541 :
542 : /*
543 : * Multiply frac by scale (to produce microseconds) and add to itm_in->tm_usec.
544 : * Returns true if successful, false if itm_in overflows.
545 : */
546 : static bool
547 4964 : AdjustFractMicroseconds(double frac, int64 scale,
548 : struct pg_itm_in *itm_in)
549 : {
550 : int64 usec;
551 :
552 : /* Fast path for common case */
553 4964 : if (frac == 0)
554 4733 : return true;
555 :
556 : /*
557 : * We assume the input frac has abs value less than 1, so overflow of frac
558 : * or usec is not an issue for interesting values of scale.
559 : */
560 231 : frac *= scale;
561 231 : usec = (int64) frac;
562 :
563 : /* Round off any fractional microsecond */
564 231 : frac -= usec;
565 231 : if (frac > 0.5)
566 12 : usec++;
567 219 : else if (frac < -0.5)
568 15 : usec--;
569 :
570 231 : return !pg_add_s64_overflow(itm_in->tm_usec, usec, &itm_in->tm_usec);
571 : }
572 :
573 : /*
574 : * Multiply frac by scale (to produce days). Add the integral part of the
575 : * result to itm_in->tm_mday, the fractional part to itm_in->tm_usec.
576 : * Returns true if successful, false if itm_in overflows.
577 : */
578 : static bool
579 552 : AdjustFractDays(double frac, int scale,
580 : struct pg_itm_in *itm_in)
581 : {
582 : int extra_days;
583 :
584 : /* Fast path for common case */
585 552 : if (frac == 0)
586 459 : return true;
587 :
588 : /*
589 : * We assume the input frac has abs value less than 1, so overflow of frac
590 : * or extra_days is not an issue.
591 : */
592 93 : frac *= scale;
593 93 : extra_days = (int) frac;
594 :
595 : /* ... but this could overflow, if tm_mday is already nonzero */
596 93 : if (pg_add_s32_overflow(itm_in->tm_mday, extra_days, &itm_in->tm_mday))
597 24 : return false;
598 :
599 : /* Handle any fractional day */
600 69 : frac -= extra_days;
601 69 : return AdjustFractMicroseconds(frac, USECS_PER_DAY, itm_in);
602 : }
603 :
604 : /*
605 : * Multiply frac by scale (to produce years), then further scale up to months.
606 : * Add the integral part of the result to itm_in->tm_mon, discarding any
607 : * fractional part.
608 : * Returns true if successful, false if itm_in overflows.
609 : */
610 : static bool
611 27367 : AdjustFractYears(double frac, int scale,
612 : struct pg_itm_in *itm_in)
613 : {
614 : /*
615 : * As above, we assume abs(frac) < 1, so this can't overflow for any
616 : * interesting value of scale.
617 : */
618 27367 : int extra_months = (int) rint(frac * scale * MONTHS_PER_YEAR);
619 :
620 27367 : return !pg_add_s32_overflow(itm_in->tm_mon, extra_months, &itm_in->tm_mon);
621 : }
622 :
623 : /*
624 : * Add (val + fval) * scale to itm_in->tm_usec.
625 : * Returns true if successful, false if itm_in overflows.
626 : */
627 : static bool
628 1404 : AdjustMicroseconds(int64 val, double fval, int64 scale,
629 : struct pg_itm_in *itm_in)
630 : {
631 : /* Handle the integer part */
632 1404 : if (!int64_multiply_add(val, scale, &itm_in->tm_usec))
633 75 : return false;
634 : /* Handle the float part */
635 1329 : return AdjustFractMicroseconds(fval, scale, itm_in);
636 : }
637 :
638 : /*
639 : * Multiply val by scale (to produce days) and add to itm_in->tm_mday.
640 : * Returns true if successful, false if itm_in overflows.
641 : */
642 : static bool
643 3695 : AdjustDays(int64 val, int scale, struct pg_itm_in *itm_in)
644 : {
645 : int days;
646 :
647 3695 : if (val < INT_MIN || val > INT_MAX)
648 18 : return false;
649 7348 : return !pg_mul_s32_overflow((int32) val, scale, &days) &&
650 3671 : !pg_add_s32_overflow(itm_in->tm_mday, days, &itm_in->tm_mday);
651 : }
652 :
653 : /*
654 : * Add val to itm_in->tm_mon (no need for scale here, as val is always
655 : * in months already).
656 : * Returns true if successful, false if itm_in overflows.
657 : */
658 : static bool
659 537 : AdjustMonths(int64 val, struct pg_itm_in *itm_in)
660 : {
661 537 : if (val < INT_MIN || val > INT_MAX)
662 6 : return false;
663 531 : return !pg_add_s32_overflow(itm_in->tm_mon, (int32) val, &itm_in->tm_mon);
664 : }
665 :
666 : /*
667 : * Multiply val by scale (to produce years) and add to itm_in->tm_year.
668 : * Returns true if successful, false if itm_in overflows.
669 : */
670 : static bool
671 27436 : AdjustYears(int64 val, int scale,
672 : struct pg_itm_in *itm_in)
673 : {
674 : int years;
675 :
676 27436 : if (val < INT_MIN || val > INT_MAX)
677 12 : return false;
678 54830 : return !pg_mul_s32_overflow((int32) val, scale, &years) &&
679 27406 : !pg_add_s32_overflow(itm_in->tm_year, years, &itm_in->tm_year);
680 : }
681 :
682 :
683 : /*
684 : * Parse the fractional part of a number (decimal point and optional digits,
685 : * followed by end of string). Returns the fractional value into *frac.
686 : *
687 : * Returns 0 if successful, DTERR code if bogus input detected.
688 : */
689 : static int
690 11708 : ParseFraction(char *cp, double *frac)
691 : {
692 : /* Caller should always pass the start of the fraction part */
693 : Assert(*cp == '.');
694 :
695 : /*
696 : * We want to allow just "." with no digits, but some versions of strtod
697 : * will report EINVAL for that, so special-case it.
698 : */
699 11708 : if (cp[1] == '\0')
700 : {
701 0 : *frac = 0;
702 : }
703 : else
704 : {
705 : /*
706 : * On the other hand, let's reject anything that's not digits after
707 : * the ".". strtod is happy with input like ".123e9", but that'd
708 : * break callers' expectation that the result is in 0..1. (It's quite
709 : * difficult to get here with such input, but not impossible.)
710 : */
711 11708 : if (strspn(cp + 1, "0123456789") != strlen(cp + 1))
712 6 : return DTERR_BAD_FORMAT;
713 :
714 11702 : errno = 0;
715 11702 : *frac = strtod(cp, &cp);
716 : /* check for parse failure (probably redundant given prior check) */
717 11702 : if (*cp != '\0' || errno != 0)
718 0 : return DTERR_BAD_FORMAT;
719 : }
720 11702 : return 0;
721 : }
722 :
723 : /*
724 : * Fetch a fractional-second value with suitable error checking.
725 : * Same as ParseFraction except we convert the result to integer microseconds.
726 : */
727 : static int
728 11459 : ParseFractionalSecond(char *cp, fsec_t *fsec)
729 : {
730 : double frac;
731 : int dterr;
732 :
733 11459 : dterr = ParseFraction(cp, &frac);
734 11459 : if (dterr)
735 6 : return dterr;
736 11453 : *fsec = rint(frac * 1000000);
737 11453 : return 0;
738 : }
739 :
740 :
741 : /* ParseDateTime()
742 : * Break string into tokens based on a date/time context.
743 : * Returns 0 if successful, DTERR code if bogus input detected.
744 : *
745 : * timestr - the input string
746 : * workbuf - workspace for field string storage. This must be
747 : * larger than the largest legal input for this datetime type --
748 : * some additional space will be needed to NUL terminate fields.
749 : * buflen - the size of workbuf
750 : * field[] - pointers to field strings are returned in this array
751 : * ftype[] - field type indicators are returned in this array
752 : * maxfields - dimensions of the above two arrays
753 : * *numfields - set to the actual number of fields detected
754 : *
755 : * The fields extracted from the input are stored as separate,
756 : * null-terminated strings in the workspace at workbuf. Any text is
757 : * converted to lower case.
758 : *
759 : * Several field types are assigned:
760 : * DTK_NUMBER - digits and (possibly) a decimal point
761 : * DTK_DATE - digits and two delimiters, or digits and text
762 : * DTK_TIME - digits, colon delimiters, and possibly a decimal point
763 : * DTK_STRING - text (no digits or punctuation)
764 : * DTK_SPECIAL - leading "+" or "-" followed by text
765 : * DTK_TZ - leading "+" or "-" followed by digits (also eats ':', '.', '-')
766 : *
767 : * Note that some field types can hold unexpected items:
768 : * DTK_NUMBER can hold date fields (yy.ddd)
769 : * DTK_STRING can hold months (January) and time zones (PST)
770 : * DTK_DATE can hold time zone names (America/New_York, GMT-8)
771 : */
772 : int
773 71501 : ParseDateTime(const char *timestr, char *workbuf, size_t buflen,
774 : char **field, int *ftype, int maxfields, int *numfields)
775 : {
776 71501 : int nf = 0;
777 71501 : const char *cp = timestr;
778 71501 : char *bufp = workbuf;
779 71501 : const char *bufend = workbuf + buflen;
780 :
781 : /*
782 : * Set the character pointed-to by "bufptr" to "newchar", and increment
783 : * "bufptr". "end" gives the end of the buffer -- we return an error if
784 : * there is no space left to append a character to the buffer. Note that
785 : * "bufptr" is evaluated twice.
786 : */
787 : #define APPEND_CHAR(bufptr, end, newchar) \
788 : do \
789 : { \
790 : if (((bufptr) + 1) >= (end)) \
791 : return DTERR_BAD_FORMAT; \
792 : *(bufptr)++ = newchar; \
793 : } while (0)
794 :
795 : /* outer loop through fields */
796 299662 : while (*cp != '\0')
797 : {
798 : /* Ignore spaces between fields */
799 228161 : if (isspace((unsigned char) *cp))
800 : {
801 68806 : cp++;
802 68806 : continue;
803 : }
804 :
805 : /* Record start of current field */
806 159355 : if (nf >= maxfields)
807 0 : return DTERR_BAD_FORMAT;
808 159355 : field[nf] = bufp;
809 :
810 : /* leading digit? then date or time */
811 159355 : if (isdigit((unsigned char) *cp))
812 : {
813 99236 : APPEND_CHAR(bufp, bufend, *cp++);
814 321781 : while (isdigit((unsigned char) *cp))
815 222545 : APPEND_CHAR(bufp, bufend, *cp++);
816 :
817 : /* time field? */
818 99236 : if (*cp == ':')
819 : {
820 30181 : ftype[nf] = DTK_TIME;
821 30181 : APPEND_CHAR(bufp, bufend, *cp++);
822 30181 : while (isdigit((unsigned char) *cp) ||
823 257352 : (*cp == ':') || (*cp == '.'))
824 227171 : APPEND_CHAR(bufp, bufend, *cp++);
825 : }
826 : /* date field? allow embedded text month */
827 69055 : else if (*cp == '-' || *cp == '/' || *cp == '.')
828 34549 : {
829 : /* save delimiting character to use later */
830 34549 : char delim = *cp;
831 :
832 34549 : APPEND_CHAR(bufp, bufend, *cp++);
833 : /* second field is all digits? then no embedded text month */
834 34549 : if (isdigit((unsigned char) *cp))
835 : {
836 34501 : ftype[nf] = ((delim == '.') ? DTK_NUMBER : DTK_DATE);
837 103521 : while (isdigit((unsigned char) *cp))
838 69020 : APPEND_CHAR(bufp, bufend, *cp++);
839 :
840 : /*
841 : * insist that the delimiters match to get a three-field
842 : * date.
843 : */
844 34501 : if (*cp == delim)
845 : {
846 34198 : ftype[nf] = DTK_DATE;
847 34198 : APPEND_CHAR(bufp, bufend, *cp++);
848 104069 : while (isdigit((unsigned char) *cp) || *cp == delim)
849 69871 : APPEND_CHAR(bufp, bufend, *cp++);
850 : }
851 : }
852 : else
853 : {
854 48 : ftype[nf] = DTK_DATE;
855 378 : while (isalnum((unsigned char) *cp) || *cp == delim)
856 330 : APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
857 : }
858 : }
859 :
860 : /*
861 : * otherwise, number only and will determine year, month, day, or
862 : * concatenated fields later...
863 : */
864 : else
865 34506 : ftype[nf] = DTK_NUMBER;
866 : }
867 : /* Leading decimal point? Then fractional seconds... */
868 60119 : else if (*cp == '.')
869 : {
870 0 : APPEND_CHAR(bufp, bufend, *cp++);
871 0 : while (isdigit((unsigned char) *cp))
872 0 : APPEND_CHAR(bufp, bufend, *cp++);
873 :
874 0 : ftype[nf] = DTK_NUMBER;
875 : }
876 :
877 : /*
878 : * text? then date string, month, day of week, special, or timezone
879 : */
880 60119 : else if (isalpha((unsigned char) *cp))
881 : {
882 : bool is_date;
883 :
884 39088 : ftype[nf] = DTK_STRING;
885 39088 : APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
886 183229 : while (isalpha((unsigned char) *cp))
887 144141 : APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
888 :
889 : /*
890 : * Dates can have embedded '-', '/', or '.' separators. It could
891 : * also be a timezone name containing embedded '/', '+', '-', '_',
892 : * or ':' (but '_' or ':' can't be the first punctuation). If the
893 : * next character is a digit or '+', we need to check whether what
894 : * we have so far is a recognized non-timezone keyword --- if so,
895 : * don't believe that this is the start of a timezone.
896 : */
897 39088 : is_date = false;
898 39088 : if (*cp == '-' || *cp == '/' || *cp == '.')
899 755 : is_date = true;
900 38333 : else if (*cp == '+' || isdigit((unsigned char) *cp))
901 : {
902 966 : *bufp = '\0'; /* null-terminate current field value */
903 : /* we need search only the core token table, not TZ names */
904 966 : if (datebsearch(field[nf], datetktbl, szdatetktbl) == NULL)
905 765 : is_date = true;
906 : }
907 39088 : if (is_date)
908 : {
909 1520 : ftype[nf] = DTK_DATE;
910 : do
911 : {
912 7163 : APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
913 7163 : } while (*cp == '+' || *cp == '-' ||
914 7016 : *cp == '/' || *cp == '_' ||
915 14101 : *cp == '.' || *cp == ':' ||
916 6728 : isalnum((unsigned char) *cp));
917 : }
918 : }
919 : /* sign? then special or numeric timezone */
920 21031 : else if (*cp == '+' || *cp == '-')
921 : {
922 20743 : APPEND_CHAR(bufp, bufend, *cp++);
923 : /* soak up leading whitespace */
924 20755 : while (isspace((unsigned char) *cp))
925 12 : cp++;
926 : /* numeric timezone? */
927 : /* note that "DTK_TZ" could also be a signed float or yyyy-mm */
928 41486 : if (isdigit((unsigned char) *cp))
929 : {
930 20279 : ftype[nf] = DTK_TZ;
931 20279 : APPEND_CHAR(bufp, bufend, *cp++);
932 20279 : while (isdigit((unsigned char) *cp) ||
933 47422 : *cp == ':' || *cp == '.' || *cp == '-')
934 27143 : APPEND_CHAR(bufp, bufend, *cp++);
935 : }
936 : /* special? */
937 464 : else if (isalpha((unsigned char) *cp))
938 : {
939 464 : ftype[nf] = DTK_SPECIAL;
940 464 : APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
941 3712 : while (isalpha((unsigned char) *cp))
942 3248 : APPEND_CHAR(bufp, bufend, pg_tolower((unsigned char) *cp++));
943 : }
944 : /* otherwise something wrong... */
945 : else
946 0 : return DTERR_BAD_FORMAT;
947 : }
948 : /* ignore other punctuation but use as delimiter */
949 288 : else if (ispunct((unsigned char) *cp))
950 : {
951 288 : cp++;
952 288 : continue;
953 : }
954 : /* otherwise, something is not right... */
955 : else
956 0 : return DTERR_BAD_FORMAT;
957 :
958 : /* force in a delimiter after each field */
959 159067 : *bufp++ = '\0';
960 159067 : nf++;
961 : }
962 :
963 71501 : *numfields = nf;
964 :
965 71501 : return 0;
966 : }
967 :
968 :
969 : /* DecodeDateTime()
970 : * Interpret previously parsed fields for general date and time.
971 : * Return 0 if full date, 1 if only time, and negative DTERR code if problems.
972 : * (Currently, all callers treat 1 as an error return too.)
973 : *
974 : * Inputs are field[] and ftype[] arrays, of length nf.
975 : * Other arguments are outputs.
976 : *
977 : * External format(s):
978 : * "<weekday> <month>-<day>-<year> <hour>:<minute>:<second>"
979 : * "Fri Feb-7-1997 15:23:27"
980 : * "Feb-7-1997 15:23:27"
981 : * "2-7-1997 15:23:27"
982 : * "1997-2-7 15:23:27"
983 : * "1997.038 15:23:27" (day of year 1-366)
984 : * Also supports input in compact time:
985 : * "970207 152327"
986 : * "97038 152327"
987 : * "20011225T040506.789-07"
988 : *
989 : * Use the system-provided functions to get the current time zone
990 : * if not specified in the input string.
991 : *
992 : * If the date is outside the range of pg_time_t (in practice that could only
993 : * happen if pg_time_t is just 32 bits), then assume UTC time zone - thomas
994 : * 1997-05-27
995 : */
996 : int
997 36693 : DecodeDateTime(char **field, int *ftype, int nf,
998 : int *dtype, struct pg_tm *tm, fsec_t *fsec, int *tzp,
999 : DateTimeErrorExtra *extra)
1000 : {
1001 36693 : int fmask = 0,
1002 : tmask,
1003 : type;
1004 36693 : int ptype = 0; /* "prefix type" for ISO and Julian formats */
1005 : int i;
1006 : int val;
1007 : int dterr;
1008 36693 : int mer = HR24;
1009 36693 : bool haveTextMonth = false;
1010 36693 : bool isjulian = false;
1011 36693 : bool is2digits = false;
1012 36693 : bool bc = false;
1013 36693 : pg_tz *namedTz = NULL;
1014 36693 : pg_tz *abbrevTz = NULL;
1015 : pg_tz *valtz;
1016 36693 : char *abbrev = NULL;
1017 : struct pg_tm cur_tm;
1018 :
1019 : /*
1020 : * We'll insist on at least all of the date fields, but initialize the
1021 : * remaining fields in case they are not set later...
1022 : */
1023 36693 : *dtype = DTK_DATE;
1024 36693 : tm->tm_hour = 0;
1025 36693 : tm->tm_min = 0;
1026 36693 : tm->tm_sec = 0;
1027 36693 : *fsec = 0;
1028 : /* don't know daylight savings time status apriori */
1029 36693 : tm->tm_isdst = -1;
1030 36693 : if (tzp != NULL)
1031 36693 : *tzp = 0;
1032 :
1033 125366 : for (i = 0; i < nf; i++)
1034 : {
1035 88838 : switch (ftype[i])
1036 : {
1037 34885 : case DTK_DATE:
1038 :
1039 : /*
1040 : * Integral julian day with attached time zone? All other
1041 : * forms with JD will be separated into distinct fields, so we
1042 : * handle just this case here.
1043 : */
1044 34885 : if (ptype == DTK_JULIAN)
1045 : {
1046 : char *cp;
1047 : int jday;
1048 :
1049 3 : if (tzp == NULL)
1050 0 : return DTERR_BAD_FORMAT;
1051 :
1052 3 : errno = 0;
1053 3 : jday = strtoint(field[i], &cp, 10);
1054 3 : if (errno == ERANGE || jday < 0)
1055 0 : return DTERR_FIELD_OVERFLOW;
1056 :
1057 3 : j2date(jday, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1058 3 : isjulian = true;
1059 :
1060 : /* Get the time zone from the end of the string */
1061 3 : dterr = DecodeTimezone(cp, tzp);
1062 3 : if (dterr)
1063 0 : return dterr;
1064 :
1065 3 : tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1066 3 : ptype = 0;
1067 3 : break;
1068 : }
1069 :
1070 : /*
1071 : * Already have a date? Then this might be a time zone name
1072 : * with embedded punctuation (e.g. "America/New_York") or a
1073 : * run-together time with trailing time zone (e.g. hhmmss-zz).
1074 : * - thomas 2001-12-25
1075 : *
1076 : * We consider it a time zone if we already have month & day.
1077 : * This is to allow the form "mmm dd hhmmss tz year", which
1078 : * we've historically accepted.
1079 : */
1080 34882 : else if (ptype != 0 ||
1081 34870 : ((fmask & (DTK_M(MONTH) | DTK_M(DAY))) ==
1082 : (DTK_M(MONTH) | DTK_M(DAY))))
1083 : {
1084 : /* No time zone accepted? Then quit... */
1085 717 : if (tzp == NULL)
1086 0 : return DTERR_BAD_FORMAT;
1087 :
1088 1410 : if (isdigit((unsigned char) *field[i]) || ptype != 0)
1089 9 : {
1090 : char *cp;
1091 :
1092 : /*
1093 : * Allow a preceding "t" field, but no other units.
1094 : */
1095 15 : if (ptype != 0)
1096 : {
1097 : /* Sanity check; should not fail this test */
1098 12 : if (ptype != DTK_TIME)
1099 0 : return DTERR_BAD_FORMAT;
1100 12 : ptype = 0;
1101 : }
1102 :
1103 : /*
1104 : * Starts with a digit but we already have a time
1105 : * field? Then we are in trouble with a date and time
1106 : * already...
1107 : */
1108 15 : if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1109 0 : return DTERR_BAD_FORMAT;
1110 :
1111 15 : if ((cp = strchr(field[i], '-')) == NULL)
1112 0 : return DTERR_BAD_FORMAT;
1113 :
1114 : /* Get the time zone from the end of the string */
1115 15 : dterr = DecodeTimezone(cp, tzp);
1116 15 : if (dterr)
1117 0 : return dterr;
1118 15 : *cp = '\0';
1119 :
1120 : /*
1121 : * Then read the rest of the field as a concatenated
1122 : * time
1123 : */
1124 15 : dterr = DecodeNumberField(strlen(field[i]), field[i],
1125 : fmask,
1126 : &tmask, tm,
1127 : fsec, &is2digits);
1128 15 : if (dterr < 0)
1129 6 : return dterr;
1130 :
1131 : /*
1132 : * modify tmask after returning from
1133 : * DecodeNumberField()
1134 : */
1135 9 : tmask |= DTK_M(TZ);
1136 : }
1137 : else
1138 : {
1139 702 : namedTz = pg_tzset(field[i]);
1140 702 : if (!namedTz)
1141 : {
1142 18 : extra->dtee_timezone = field[i];
1143 18 : return DTERR_BAD_TIMEZONE;
1144 : }
1145 : /* we'll apply the zone setting below */
1146 684 : tmask = DTK_M(TZ);
1147 : }
1148 : }
1149 : else
1150 : {
1151 34165 : dterr = DecodeDate(field[i], fmask,
1152 : &tmask, &is2digits, tm);
1153 34165 : if (dterr)
1154 18 : return dterr;
1155 : }
1156 34840 : break;
1157 :
1158 27516 : case DTK_TIME:
1159 :
1160 : /*
1161 : * This might be an ISO time following a "t" field.
1162 : */
1163 27516 : if (ptype != 0)
1164 : {
1165 : /* Sanity check; should not fail this test */
1166 6 : if (ptype != DTK_TIME)
1167 0 : return DTERR_BAD_FORMAT;
1168 6 : ptype = 0;
1169 : }
1170 27516 : dterr = DecodeTime(field[i], fmask, INTERVAL_FULL_RANGE,
1171 : &tmask, tm, fsec);
1172 27516 : if (dterr)
1173 0 : return dterr;
1174 :
1175 : /* check for time overflow */
1176 27516 : if (time_overflows(tm->tm_hour, tm->tm_min, tm->tm_sec,
1177 : *fsec))
1178 0 : return DTERR_FIELD_OVERFLOW;
1179 27516 : break;
1180 :
1181 18423 : case DTK_TZ:
1182 : {
1183 : int tz;
1184 :
1185 18423 : if (tzp == NULL)
1186 6 : return DTERR_BAD_FORMAT;
1187 :
1188 18423 : dterr = DecodeTimezone(field[i], &tz);
1189 18423 : if (dterr)
1190 6 : return dterr;
1191 18417 : *tzp = tz;
1192 18417 : tmask = DTK_M(TZ);
1193 : }
1194 18417 : break;
1195 :
1196 3200 : case DTK_NUMBER:
1197 :
1198 : /*
1199 : * Deal with cases where previous field labeled this one
1200 : */
1201 3200 : if (ptype != 0)
1202 : {
1203 : char *cp;
1204 : int value;
1205 :
1206 72 : errno = 0;
1207 72 : value = strtoint(field[i], &cp, 10);
1208 72 : if (errno == ERANGE)
1209 6 : return DTERR_FIELD_OVERFLOW;
1210 72 : if (*cp != '.' && *cp != '\0')
1211 0 : return DTERR_BAD_FORMAT;
1212 :
1213 72 : switch (ptype)
1214 : {
1215 48 : case DTK_JULIAN:
1216 : /* previous field was a label for "julian date" */
1217 48 : if (value < 0)
1218 0 : return DTERR_FIELD_OVERFLOW;
1219 48 : tmask = DTK_DATE_M;
1220 48 : j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1221 48 : isjulian = true;
1222 :
1223 : /* fractional Julian Day? */
1224 48 : if (*cp == '.')
1225 : {
1226 : double time;
1227 :
1228 6 : dterr = ParseFraction(cp, &time);
1229 6 : if (dterr)
1230 0 : return dterr;
1231 6 : time *= USECS_PER_DAY;
1232 6 : dt2time(time,
1233 : &tm->tm_hour, &tm->tm_min,
1234 : &tm->tm_sec, fsec);
1235 6 : tmask |= DTK_TIME_M;
1236 : }
1237 48 : break;
1238 :
1239 18 : case DTK_TIME:
1240 : /* previous field was "t" for ISO time */
1241 18 : dterr = DecodeNumberField(strlen(field[i]), field[i],
1242 : (fmask | DTK_DATE_M),
1243 : &tmask, tm,
1244 : fsec, &is2digits);
1245 18 : if (dterr < 0)
1246 0 : return dterr;
1247 18 : if (tmask != DTK_TIME_M)
1248 0 : return DTERR_BAD_FORMAT;
1249 18 : break;
1250 :
1251 6 : default:
1252 6 : return DTERR_BAD_FORMAT;
1253 : break;
1254 : }
1255 :
1256 66 : ptype = 0;
1257 66 : *dtype = DTK_DATE;
1258 : }
1259 : else
1260 : {
1261 : char *cp;
1262 : int flen;
1263 :
1264 3128 : flen = strlen(field[i]);
1265 3128 : cp = strchr(field[i], '.');
1266 :
1267 : /* Embedded decimal and no date yet? */
1268 3128 : if (cp != NULL && !(fmask & DTK_DATE_M))
1269 : {
1270 15 : dterr = DecodeDate(field[i], fmask,
1271 : &tmask, &is2digits, tm);
1272 15 : if (dterr)
1273 0 : return dterr;
1274 : }
1275 : /* embedded decimal and several digits before? */
1276 3113 : else if (cp != NULL && flen - strlen(cp) > 2)
1277 : {
1278 : /*
1279 : * Interpret as a concatenated date or time Set the
1280 : * type field to allow decoding other fields later.
1281 : * Example: 20011223 or 040506
1282 : */
1283 6 : dterr = DecodeNumberField(flen, field[i], fmask,
1284 : &tmask, tm,
1285 : fsec, &is2digits);
1286 6 : if (dterr < 0)
1287 0 : return dterr;
1288 : }
1289 :
1290 : /*
1291 : * Is this a YMD or HMS specification, or a year number?
1292 : * YMD and HMS are required to be six digits or more, so
1293 : * if it is 5 digits, it is a year. If it is six or more
1294 : * digits, we assume it is YMD or HMS unless no date and
1295 : * no time values have been specified. This forces 6+
1296 : * digit years to be at the end of the string, or to use
1297 : * the ISO date specification.
1298 : */
1299 3107 : else if (flen >= 6 && (!(fmask & DTK_DATE_M) ||
1300 48 : !(fmask & DTK_TIME_M)))
1301 : {
1302 169 : dterr = DecodeNumberField(flen, field[i], fmask,
1303 : &tmask, tm,
1304 : fsec, &is2digits);
1305 169 : if (dterr < 0)
1306 0 : return dterr;
1307 : }
1308 : /* otherwise it is a single date/time field... */
1309 : else
1310 : {
1311 2938 : dterr = DecodeNumber(flen, field[i],
1312 : haveTextMonth, fmask,
1313 : &tmask, tm,
1314 : fsec, &is2digits);
1315 2938 : if (dterr)
1316 6 : return dterr;
1317 : }
1318 : }
1319 3188 : break;
1320 :
1321 4814 : case DTK_STRING:
1322 : case DTK_SPECIAL:
1323 : /* timezone abbrevs take precedence over built-in tokens */
1324 4814 : dterr = DecodeTimezoneAbbrev(i, field[i],
1325 : &type, &val, &valtz, extra);
1326 4814 : if (dterr)
1327 0 : return dterr;
1328 4814 : if (type == UNKNOWN_FIELD)
1329 3579 : type = DecodeSpecial(i, field[i], &val);
1330 4814 : if (type == IGNORE_DTF)
1331 0 : continue;
1332 :
1333 4814 : tmask = DTK_M(type);
1334 4814 : switch (type)
1335 : {
1336 922 : case RESERV:
1337 922 : switch (val)
1338 : {
1339 57 : case DTK_NOW:
1340 57 : tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
1341 57 : *dtype = DTK_DATE;
1342 57 : GetCurrentTimeUsec(tm, fsec, tzp);
1343 57 : break;
1344 :
1345 51 : case DTK_YESTERDAY:
1346 51 : tmask = DTK_DATE_M;
1347 51 : *dtype = DTK_DATE;
1348 51 : GetCurrentDateTime(&cur_tm);
1349 51 : j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) - 1,
1350 : &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1351 51 : break;
1352 :
1353 72 : case DTK_TODAY:
1354 72 : tmask = DTK_DATE_M;
1355 72 : *dtype = DTK_DATE;
1356 72 : GetCurrentDateTime(&cur_tm);
1357 72 : tm->tm_year = cur_tm.tm_year;
1358 72 : tm->tm_mon = cur_tm.tm_mon;
1359 72 : tm->tm_mday = cur_tm.tm_mday;
1360 72 : break;
1361 :
1362 75 : case DTK_TOMORROW:
1363 75 : tmask = DTK_DATE_M;
1364 75 : *dtype = DTK_DATE;
1365 75 : GetCurrentDateTime(&cur_tm);
1366 75 : j2date(date2j(cur_tm.tm_year, cur_tm.tm_mon, cur_tm.tm_mday) + 1,
1367 : &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1368 75 : break;
1369 :
1370 3 : case DTK_ZULU:
1371 3 : tmask = (DTK_TIME_M | DTK_M(TZ));
1372 3 : *dtype = DTK_DATE;
1373 3 : tm->tm_hour = 0;
1374 3 : tm->tm_min = 0;
1375 3 : tm->tm_sec = 0;
1376 3 : if (tzp != NULL)
1377 3 : *tzp = 0;
1378 3 : break;
1379 :
1380 664 : case DTK_EPOCH:
1381 : case DTK_LATE:
1382 : case DTK_EARLY:
1383 664 : tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
1384 664 : *dtype = val;
1385 : /* caller ignores tm for these dtype codes */
1386 664 : break;
1387 :
1388 0 : default:
1389 0 : elog(ERROR, "unrecognized RESERV datetime token: %d",
1390 : val);
1391 : }
1392 :
1393 922 : break;
1394 :
1395 1349 : case MONTH:
1396 :
1397 : /*
1398 : * already have a (numeric) month? then see if we can
1399 : * substitute...
1400 : */
1401 1349 : if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
1402 46 : !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 &&
1403 40 : tm->tm_mon <= 31)
1404 : {
1405 37 : tm->tm_mday = tm->tm_mon;
1406 37 : tmask = DTK_M(DAY);
1407 : }
1408 1349 : haveTextMonth = true;
1409 1349 : tm->tm_mon = val;
1410 1349 : break;
1411 :
1412 3 : case DTZMOD:
1413 :
1414 : /*
1415 : * daylight savings time modifier (solves "MET DST"
1416 : * syntax)
1417 : */
1418 3 : tmask |= DTK_M(DTZ);
1419 3 : tm->tm_isdst = 1;
1420 3 : if (tzp == NULL)
1421 0 : return DTERR_BAD_FORMAT;
1422 3 : *tzp -= val;
1423 3 : break;
1424 :
1425 898 : case DTZ:
1426 :
1427 : /*
1428 : * set mask for TZ here _or_ check for DTZ later when
1429 : * getting default timezone
1430 : */
1431 898 : tmask |= DTK_M(TZ);
1432 898 : tm->tm_isdst = 1;
1433 898 : if (tzp == NULL)
1434 0 : return DTERR_BAD_FORMAT;
1435 898 : *tzp = -val;
1436 898 : break;
1437 :
1438 295 : case TZ:
1439 295 : tm->tm_isdst = 0;
1440 295 : if (tzp == NULL)
1441 0 : return DTERR_BAD_FORMAT;
1442 295 : *tzp = -val;
1443 295 : break;
1444 :
1445 42 : case DYNTZ:
1446 42 : tmask |= DTK_M(TZ);
1447 42 : if (tzp == NULL)
1448 0 : return DTERR_BAD_FORMAT;
1449 : /* we'll determine the actual offset later */
1450 42 : abbrevTz = valtz;
1451 42 : abbrev = field[i];
1452 42 : break;
1453 :
1454 18 : case AMPM:
1455 18 : mer = val;
1456 18 : break;
1457 :
1458 167 : case ADBC:
1459 167 : bc = (val == BC);
1460 167 : break;
1461 :
1462 988 : case DOW:
1463 988 : tm->tm_wday = val;
1464 988 : break;
1465 :
1466 69 : case UNITS:
1467 69 : tmask = 0;
1468 : /* reject consecutive unhandled units */
1469 69 : if (ptype != 0)
1470 6 : return DTERR_BAD_FORMAT;
1471 63 : ptype = val;
1472 63 : break;
1473 :
1474 36 : case ISOTIME:
1475 :
1476 : /*
1477 : * This is a filler field "t" indicating that the next
1478 : * field is time. Try to verify that this is sensible.
1479 : */
1480 36 : tmask = 0;
1481 :
1482 : /* No preceding date? Then quit... */
1483 36 : if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1484 0 : return DTERR_BAD_FORMAT;
1485 :
1486 : /* reject consecutive unhandled units */
1487 36 : if (ptype != 0)
1488 0 : return DTERR_BAD_FORMAT;
1489 36 : ptype = val;
1490 36 : break;
1491 :
1492 27 : case UNKNOWN_FIELD:
1493 :
1494 : /*
1495 : * Before giving up and declaring error, check to see
1496 : * if it is an all-alpha timezone name.
1497 : */
1498 27 : namedTz = pg_tzset(field[i]);
1499 27 : if (!namedTz)
1500 27 : return DTERR_BAD_FORMAT;
1501 : /* we'll apply the zone setting below */
1502 0 : tmask = DTK_M(TZ);
1503 0 : break;
1504 :
1505 0 : default:
1506 0 : return DTERR_BAD_FORMAT;
1507 : }
1508 4781 : break;
1509 :
1510 0 : default:
1511 0 : return DTERR_BAD_FORMAT;
1512 : }
1513 :
1514 88745 : if (tmask & fmask)
1515 72 : return DTERR_BAD_FORMAT;
1516 88673 : fmask |= tmask;
1517 : } /* end loop over fields */
1518 :
1519 : /* reject if prefix type appeared and was never handled */
1520 36528 : if (ptype != 0)
1521 0 : return DTERR_BAD_FORMAT;
1522 :
1523 : /* do additional checking for normal date specs (but not "infinity" etc) */
1524 36528 : if (*dtype == DTK_DATE)
1525 : {
1526 : /* do final checking/adjustment of Y/M/D fields */
1527 35936 : dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
1528 35936 : if (dterr)
1529 99 : return dterr;
1530 :
1531 : /* handle AM/PM */
1532 35837 : if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
1533 0 : return DTERR_FIELD_OVERFLOW;
1534 35837 : if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
1535 0 : tm->tm_hour = 0;
1536 35837 : else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
1537 18 : tm->tm_hour += HOURS_PER_DAY / 2;
1538 :
1539 : /* check for incomplete input */
1540 35837 : if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1541 : {
1542 3 : if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1543 0 : return 1;
1544 3 : return DTERR_BAD_FORMAT;
1545 : }
1546 :
1547 : /*
1548 : * If we had a full timezone spec, compute the offset (we could not do
1549 : * it before, because we need the date to resolve DST status).
1550 : */
1551 35834 : if (namedTz != NULL)
1552 : {
1553 : /* daylight savings time modifier disallowed with full TZ */
1554 684 : if (fmask & DTK_M(DTZMOD))
1555 0 : return DTERR_BAD_FORMAT;
1556 :
1557 684 : *tzp = DetermineTimeZoneOffset(tm, namedTz);
1558 : }
1559 :
1560 : /*
1561 : * Likewise, if we had a dynamic timezone abbreviation, resolve it
1562 : * now.
1563 : */
1564 35834 : if (abbrevTz != NULL)
1565 : {
1566 : /* daylight savings time modifier disallowed with dynamic TZ */
1567 42 : if (fmask & DTK_M(DTZMOD))
1568 0 : return DTERR_BAD_FORMAT;
1569 :
1570 42 : *tzp = DetermineTimeZoneAbbrevOffset(tm, abbrev, abbrevTz);
1571 : }
1572 :
1573 : /* timezone not specified? then use session timezone */
1574 35834 : if (tzp != NULL && !(fmask & DTK_M(TZ)))
1575 : {
1576 : /*
1577 : * daylight savings time modifier but no standard timezone? then
1578 : * error
1579 : */
1580 15438 : if (fmask & DTK_M(DTZMOD))
1581 0 : return DTERR_BAD_FORMAT;
1582 :
1583 15438 : *tzp = DetermineTimeZoneOffset(tm, session_timezone);
1584 : }
1585 : }
1586 :
1587 36426 : return 0;
1588 : }
1589 :
1590 :
1591 : /* DetermineTimeZoneOffset()
1592 : *
1593 : * Given a struct pg_tm in which tm_year, tm_mon, tm_mday, tm_hour, tm_min,
1594 : * and tm_sec fields are set, and a zic-style time zone definition, determine
1595 : * the applicable GMT offset and daylight-savings status at that time.
1596 : * Set the struct pg_tm's tm_isdst field accordingly, and return the GMT
1597 : * offset as the function result.
1598 : *
1599 : * Note: if the date is out of the range we can deal with, we return zero
1600 : * as the GMT offset and set tm_isdst = 0. We don't throw an error here,
1601 : * though probably some higher-level code will.
1602 : */
1603 : int
1604 57206 : DetermineTimeZoneOffset(struct pg_tm *tm, pg_tz *tzp)
1605 : {
1606 : pg_time_t t;
1607 :
1608 57206 : return DetermineTimeZoneOffsetInternal(tm, tzp, &t);
1609 : }
1610 :
1611 :
1612 : /* DetermineTimeZoneOffsetInternal()
1613 : *
1614 : * As above, but also return the actual UTC time imputed to the date/time
1615 : * into *tp.
1616 : *
1617 : * In event of an out-of-range date, we punt by returning zero into *tp.
1618 : * This is okay for the immediate callers but is a good reason for not
1619 : * exposing this worker function globally.
1620 : *
1621 : * Note: it might seem that we should use mktime() for this, but bitter
1622 : * experience teaches otherwise. This code is much faster than most versions
1623 : * of mktime(), anyway.
1624 : */
1625 : static int
1626 57299 : DetermineTimeZoneOffsetInternal(struct pg_tm *tm, pg_tz *tzp, pg_time_t *tp)
1627 : {
1628 : int date,
1629 : sec;
1630 : pg_time_t day,
1631 : mytime,
1632 : prevtime,
1633 : boundary,
1634 : beforetime,
1635 : aftertime;
1636 : long int before_gmtoff,
1637 : after_gmtoff;
1638 : int before_isdst,
1639 : after_isdst;
1640 : int res;
1641 :
1642 : /*
1643 : * First, generate the pg_time_t value corresponding to the given
1644 : * y/m/d/h/m/s taken as GMT time. If this overflows, punt and decide the
1645 : * timezone is GMT. (For a valid Julian date, integer overflow should be
1646 : * impossible with 64-bit pg_time_t, but let's check for safety.)
1647 : */
1648 57299 : if (!IS_VALID_JULIAN(tm->tm_year, tm->tm_mon, tm->tm_mday))
1649 12 : goto overflow;
1650 57287 : date = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - UNIX_EPOCH_JDATE;
1651 :
1652 57287 : day = ((pg_time_t) date) * SECS_PER_DAY;
1653 57287 : if (day / SECS_PER_DAY != date)
1654 0 : goto overflow;
1655 57287 : sec = tm->tm_sec + (tm->tm_min + tm->tm_hour * MINS_PER_HOUR) * SECS_PER_MINUTE;
1656 57287 : mytime = day + sec;
1657 : /* since sec >= 0, overflow could only be from +day to -mytime */
1658 57287 : if (mytime < 0 && day > 0)
1659 0 : goto overflow;
1660 :
1661 : /*
1662 : * Find the DST time boundary just before or following the target time. We
1663 : * assume that all zones have GMT offsets less than 24 hours, and that DST
1664 : * boundaries can't be closer together than 48 hours, so backing up 24
1665 : * hours and finding the "next" boundary will work.
1666 : */
1667 57287 : prevtime = mytime - SECS_PER_DAY;
1668 57287 : if (mytime < 0 && prevtime > 0)
1669 0 : goto overflow;
1670 :
1671 57287 : res = pg_next_dst_boundary(&prevtime,
1672 : &before_gmtoff, &before_isdst,
1673 : &boundary,
1674 : &after_gmtoff, &after_isdst,
1675 : tzp);
1676 57287 : if (res < 0)
1677 0 : goto overflow; /* failure? */
1678 :
1679 57287 : if (res == 0)
1680 : {
1681 : /* Non-DST zone, life is simple */
1682 2166 : tm->tm_isdst = before_isdst;
1683 2166 : *tp = mytime - before_gmtoff;
1684 2166 : return -(int) before_gmtoff;
1685 : }
1686 :
1687 : /*
1688 : * Form the candidate pg_time_t values with local-time adjustment
1689 : */
1690 55121 : beforetime = mytime - before_gmtoff;
1691 55121 : if ((before_gmtoff > 0 &&
1692 6 : mytime < 0 && beforetime > 0) ||
1693 55121 : (before_gmtoff <= 0 &&
1694 48698 : mytime > 0 && beforetime < 0))
1695 0 : goto overflow;
1696 55121 : aftertime = mytime - after_gmtoff;
1697 55121 : if ((after_gmtoff > 0 &&
1698 6 : mytime < 0 && aftertime > 0) ||
1699 55121 : (after_gmtoff <= 0 &&
1700 48698 : mytime > 0 && aftertime < 0))
1701 0 : goto overflow;
1702 :
1703 : /*
1704 : * If both before or both after the boundary time, we know what to do. The
1705 : * boundary time itself is considered to be after the transition, which
1706 : * means we can accept aftertime == boundary in the second case.
1707 : */
1708 55121 : if (beforetime < boundary && aftertime < boundary)
1709 : {
1710 47041 : tm->tm_isdst = before_isdst;
1711 47041 : *tp = beforetime;
1712 47041 : return -(int) before_gmtoff;
1713 : }
1714 8080 : if (beforetime > boundary && aftertime >= boundary)
1715 : {
1716 8005 : tm->tm_isdst = after_isdst;
1717 8005 : *tp = aftertime;
1718 8005 : return -(int) after_gmtoff;
1719 : }
1720 :
1721 : /*
1722 : * It's an invalid or ambiguous time due to timezone transition. In a
1723 : * spring-forward transition, prefer the "before" interpretation; in a
1724 : * fall-back transition, prefer "after". (We used to define and implement
1725 : * this test as "prefer the standard-time interpretation", but that rule
1726 : * does not help to resolve the behavior when both times are reported as
1727 : * standard time; which does happen, eg Europe/Moscow in Oct 2014. Also,
1728 : * in some zones such as Europe/Dublin, there is widespread confusion
1729 : * about which time offset is "standard" time, so it's fortunate that our
1730 : * behavior doesn't depend on that.)
1731 : */
1732 75 : if (beforetime > aftertime)
1733 : {
1734 36 : tm->tm_isdst = before_isdst;
1735 36 : *tp = beforetime;
1736 36 : return -(int) before_gmtoff;
1737 : }
1738 39 : tm->tm_isdst = after_isdst;
1739 39 : *tp = aftertime;
1740 39 : return -(int) after_gmtoff;
1741 :
1742 12 : overflow:
1743 : /* Given date is out of range, so assume UTC */
1744 12 : tm->tm_isdst = 0;
1745 12 : *tp = 0;
1746 12 : return 0;
1747 : }
1748 :
1749 :
1750 : /* DetermineTimeZoneAbbrevOffset()
1751 : *
1752 : * Determine the GMT offset and DST flag to be attributed to a dynamic
1753 : * time zone abbreviation, that is one whose meaning has changed over time.
1754 : * *tm contains the local time at which the meaning should be determined,
1755 : * and tm->tm_isdst receives the DST flag.
1756 : *
1757 : * This differs from the behavior of DetermineTimeZoneOffset() in that a
1758 : * standard-time or daylight-time abbreviation forces use of the corresponding
1759 : * GMT offset even when the zone was then in DS or standard time respectively.
1760 : * (However, that happens only if we can match the given abbreviation to some
1761 : * abbreviation that appears in the IANA timezone data. Otherwise, we fall
1762 : * back to doing DetermineTimeZoneOffset().)
1763 : */
1764 : int
1765 93 : DetermineTimeZoneAbbrevOffset(struct pg_tm *tm, const char *abbr, pg_tz *tzp)
1766 : {
1767 : pg_time_t t;
1768 : int zone_offset;
1769 : int abbr_offset;
1770 : int abbr_isdst;
1771 :
1772 : /*
1773 : * Compute the UTC time we want to probe at. (In event of overflow, we'll
1774 : * probe at the epoch, which is a bit random but probably doesn't matter.)
1775 : */
1776 93 : zone_offset = DetermineTimeZoneOffsetInternal(tm, tzp, &t);
1777 :
1778 : /*
1779 : * Try to match the abbreviation to something in the zone definition.
1780 : */
1781 93 : if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1782 : &abbr_offset, &abbr_isdst))
1783 : {
1784 : /* Success, so use the abbrev-specific answers. */
1785 93 : tm->tm_isdst = abbr_isdst;
1786 93 : return abbr_offset;
1787 : }
1788 :
1789 : /*
1790 : * No match, so use the answers we already got from
1791 : * DetermineTimeZoneOffsetInternal.
1792 : */
1793 0 : return zone_offset;
1794 : }
1795 :
1796 :
1797 : /* DetermineTimeZoneAbbrevOffsetTS()
1798 : *
1799 : * As above but the probe time is specified as a TimestampTz (hence, UTC time),
1800 : * and DST status is returned into *isdst rather than into tm->tm_isdst.
1801 : */
1802 : int
1803 633 : DetermineTimeZoneAbbrevOffsetTS(TimestampTz ts, const char *abbr,
1804 : pg_tz *tzp, int *isdst)
1805 : {
1806 633 : pg_time_t t = timestamptz_to_time_t(ts);
1807 : int zone_offset;
1808 : int abbr_offset;
1809 : int tz;
1810 : struct pg_tm tm;
1811 : fsec_t fsec;
1812 :
1813 : /*
1814 : * If the abbrev matches anything in the zone data, this is pretty easy.
1815 : */
1816 633 : if (DetermineTimeZoneAbbrevOffsetInternal(t, abbr, tzp,
1817 : &abbr_offset, isdst))
1818 48 : return abbr_offset;
1819 :
1820 : /*
1821 : * Else, break down the timestamp so we can use DetermineTimeZoneOffset.
1822 : */
1823 585 : if (timestamp2tm(ts, &tz, &tm, &fsec, NULL, tzp) != 0)
1824 0 : ereport(ERROR,
1825 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
1826 : errmsg("timestamp out of range")));
1827 :
1828 585 : zone_offset = DetermineTimeZoneOffset(&tm, tzp);
1829 585 : *isdst = tm.tm_isdst;
1830 585 : return zone_offset;
1831 : }
1832 :
1833 :
1834 : /* DetermineTimeZoneAbbrevOffsetInternal()
1835 : *
1836 : * Workhorse for above two functions: work from a pg_time_t probe instant.
1837 : * On success, return GMT offset and DST status into *offset and *isdst.
1838 : */
1839 : static bool
1840 726 : DetermineTimeZoneAbbrevOffsetInternal(pg_time_t t, const char *abbr, pg_tz *tzp,
1841 : int *offset, int *isdst)
1842 : {
1843 : char upabbr[TZ_STRLEN_MAX + 1];
1844 : unsigned char *p;
1845 : long int gmtoff;
1846 :
1847 : /* We need to force the abbrev to upper case */
1848 726 : strlcpy(upabbr, abbr, sizeof(upabbr));
1849 3417 : for (p = (unsigned char *) upabbr; *p; p++)
1850 2691 : *p = pg_toupper(*p);
1851 :
1852 : /* Look up the abbrev's meaning at this time in this zone */
1853 726 : if (pg_interpret_timezone_abbrev(upabbr,
1854 : &t,
1855 : &gmtoff,
1856 : isdst,
1857 : tzp))
1858 : {
1859 : /* Change sign to agree with DetermineTimeZoneOffset() */
1860 141 : *offset = (int) -gmtoff;
1861 141 : return true;
1862 : }
1863 585 : return false;
1864 : }
1865 :
1866 :
1867 : /* TimeZoneAbbrevIsKnown()
1868 : *
1869 : * Detect whether the given string is a time zone abbreviation that's known
1870 : * in the specified TZDB timezone, and if so whether it's fixed or varying
1871 : * meaning. The match is not case-sensitive.
1872 : */
1873 : static bool
1874 4123 : TimeZoneAbbrevIsKnown(const char *abbr, pg_tz *tzp,
1875 : bool *isfixed, int *offset, int *isdst)
1876 : {
1877 : char upabbr[TZ_STRLEN_MAX + 1];
1878 : unsigned char *p;
1879 : long int gmtoff;
1880 :
1881 : /* We need to force the abbrev to upper case */
1882 4123 : strlcpy(upabbr, abbr, sizeof(upabbr));
1883 22160 : for (p = (unsigned char *) upabbr; *p; p++)
1884 18037 : *p = pg_toupper(*p);
1885 :
1886 : /* Look up the abbrev's meaning in this zone */
1887 4123 : if (pg_timezone_abbrev_is_known(upabbr,
1888 : isfixed,
1889 : &gmtoff,
1890 : isdst,
1891 : tzp))
1892 : {
1893 : /* Change sign to agree with DetermineTimeZoneOffset() */
1894 123 : *offset = (int) -gmtoff;
1895 123 : return true;
1896 : }
1897 4000 : return false;
1898 : }
1899 :
1900 :
1901 : /* DecodeTimeOnly()
1902 : * Interpret parsed string as time fields only.
1903 : * Returns 0 if successful, DTERR code if bogus input detected.
1904 : *
1905 : * Inputs are field[] and ftype[] arrays, of length nf.
1906 : * Other arguments are outputs.
1907 : *
1908 : * Note that support for time zone is here for
1909 : * SQL TIME WITH TIME ZONE, but it reveals
1910 : * bogosity with SQL date/time standards, since
1911 : * we must infer a time zone from current time.
1912 : * - thomas 2000-03-10
1913 : * Allow specifying date to get a better time zone,
1914 : * if time zones are allowed. - thomas 2001-12-26
1915 : */
1916 : int
1917 2135 : DecodeTimeOnly(char **field, int *ftype, int nf,
1918 : int *dtype, struct pg_tm *tm, fsec_t *fsec, int *tzp,
1919 : DateTimeErrorExtra *extra)
1920 : {
1921 2135 : int fmask = 0,
1922 : tmask,
1923 : type;
1924 2135 : int ptype = 0; /* "prefix type" for ISO and Julian formats */
1925 : int i;
1926 : int val;
1927 : int dterr;
1928 2135 : bool isjulian = false;
1929 2135 : bool is2digits = false;
1930 2135 : bool bc = false;
1931 2135 : int mer = HR24;
1932 2135 : pg_tz *namedTz = NULL;
1933 2135 : pg_tz *abbrevTz = NULL;
1934 2135 : char *abbrev = NULL;
1935 : pg_tz *valtz;
1936 :
1937 2135 : *dtype = DTK_TIME;
1938 2135 : tm->tm_hour = 0;
1939 2135 : tm->tm_min = 0;
1940 2135 : tm->tm_sec = 0;
1941 2135 : *fsec = 0;
1942 : /* don't know daylight savings time status apriori */
1943 2135 : tm->tm_isdst = -1;
1944 :
1945 2135 : if (tzp != NULL)
1946 2135 : *tzp = 0;
1947 :
1948 5499 : for (i = 0; i < nf; i++)
1949 : {
1950 3376 : switch (ftype[i])
1951 : {
1952 701 : case DTK_DATE:
1953 :
1954 : /*
1955 : * Time zone not allowed? Then should not accept dates or time
1956 : * zones no matter what else!
1957 : */
1958 701 : if (tzp == NULL)
1959 0 : return DTERR_BAD_FORMAT;
1960 :
1961 : /* Under limited circumstances, we will accept a date... */
1962 701 : if (i == 0 && nf >= 2 &&
1963 105 : (ftype[nf - 1] == DTK_DATE || ftype[1] == DTK_TIME))
1964 : {
1965 105 : dterr = DecodeDate(field[i], fmask,
1966 : &tmask, &is2digits, tm);
1967 105 : if (dterr)
1968 0 : return dterr;
1969 : }
1970 : /* otherwise, this is a time and/or time zone */
1971 : else
1972 : {
1973 596 : if (isdigit((unsigned char) *field[i]))
1974 : {
1975 : char *cp;
1976 :
1977 : /*
1978 : * Starts with a digit but we already have a time
1979 : * field? Then we are in trouble with time already...
1980 : */
1981 0 : if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1982 0 : return DTERR_BAD_FORMAT;
1983 :
1984 : /*
1985 : * Should not get here and fail. Sanity check only...
1986 : */
1987 0 : if ((cp = strchr(field[i], '-')) == NULL)
1988 0 : return DTERR_BAD_FORMAT;
1989 :
1990 : /* Get the time zone from the end of the string */
1991 0 : dterr = DecodeTimezone(cp, tzp);
1992 0 : if (dterr)
1993 0 : return dterr;
1994 0 : *cp = '\0';
1995 :
1996 : /*
1997 : * Then read the rest of the field as a concatenated
1998 : * time
1999 : */
2000 0 : dterr = DecodeNumberField(strlen(field[i]), field[i],
2001 : (fmask | DTK_DATE_M),
2002 : &tmask, tm,
2003 : fsec, &is2digits);
2004 0 : if (dterr < 0)
2005 0 : return dterr;
2006 0 : ftype[i] = dterr;
2007 :
2008 0 : tmask |= DTK_M(TZ);
2009 : }
2010 : else
2011 : {
2012 596 : namedTz = pg_tzset(field[i]);
2013 596 : if (!namedTz)
2014 : {
2015 0 : extra->dtee_timezone = field[i];
2016 0 : return DTERR_BAD_TIMEZONE;
2017 : }
2018 : /* we'll apply the zone setting below */
2019 596 : ftype[i] = DTK_TZ;
2020 596 : tmask = DTK_M(TZ);
2021 : }
2022 : }
2023 701 : break;
2024 :
2025 2048 : case DTK_TIME:
2026 :
2027 : /*
2028 : * This might be an ISO time following a "t" field.
2029 : */
2030 2048 : if (ptype != 0)
2031 : {
2032 18 : if (ptype != DTK_TIME)
2033 0 : return DTERR_BAD_FORMAT;
2034 18 : ptype = 0;
2035 : }
2036 :
2037 2048 : dterr = DecodeTime(field[i], (fmask | DTK_DATE_M),
2038 : INTERVAL_FULL_RANGE,
2039 : &tmask, tm, fsec);
2040 2048 : if (dterr)
2041 0 : return dterr;
2042 2048 : break;
2043 :
2044 315 : case DTK_TZ:
2045 : {
2046 : int tz;
2047 :
2048 315 : if (tzp == NULL)
2049 0 : return DTERR_BAD_FORMAT;
2050 :
2051 315 : dterr = DecodeTimezone(field[i], &tz);
2052 315 : if (dterr)
2053 0 : return dterr;
2054 315 : *tzp = tz;
2055 315 : tmask = DTK_M(TZ);
2056 : }
2057 315 : break;
2058 :
2059 90 : case DTK_NUMBER:
2060 :
2061 : /*
2062 : * Deal with cases where previous field labeled this one
2063 : */
2064 90 : if (ptype != 0)
2065 : {
2066 : char *cp;
2067 : int value;
2068 :
2069 60 : errno = 0;
2070 60 : value = strtoint(field[i], &cp, 10);
2071 60 : if (errno == ERANGE)
2072 12 : return DTERR_FIELD_OVERFLOW;
2073 60 : if (*cp != '.' && *cp != '\0')
2074 0 : return DTERR_BAD_FORMAT;
2075 :
2076 60 : switch (ptype)
2077 : {
2078 3 : case DTK_JULIAN:
2079 : /* previous field was a label for "julian date" */
2080 3 : if (tzp == NULL)
2081 0 : return DTERR_BAD_FORMAT;
2082 3 : if (value < 0)
2083 0 : return DTERR_FIELD_OVERFLOW;
2084 3 : tmask = DTK_DATE_M;
2085 3 : j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2086 3 : isjulian = true;
2087 :
2088 3 : if (*cp == '.')
2089 : {
2090 : double time;
2091 :
2092 0 : dterr = ParseFraction(cp, &time);
2093 0 : if (dterr)
2094 0 : return dterr;
2095 0 : time *= USECS_PER_DAY;
2096 0 : dt2time(time,
2097 : &tm->tm_hour, &tm->tm_min,
2098 : &tm->tm_sec, fsec);
2099 0 : tmask |= DTK_TIME_M;
2100 : }
2101 3 : break;
2102 :
2103 51 : case DTK_TIME:
2104 : /* previous field was "t" for ISO time */
2105 51 : dterr = DecodeNumberField(strlen(field[i]), field[i],
2106 : (fmask | DTK_DATE_M),
2107 : &tmask, tm,
2108 : fsec, &is2digits);
2109 51 : if (dterr < 0)
2110 6 : return dterr;
2111 45 : ftype[i] = dterr;
2112 :
2113 45 : if (tmask != DTK_TIME_M)
2114 0 : return DTERR_BAD_FORMAT;
2115 45 : break;
2116 :
2117 6 : default:
2118 6 : return DTERR_BAD_FORMAT;
2119 : break;
2120 : }
2121 :
2122 48 : ptype = 0;
2123 48 : *dtype = DTK_DATE;
2124 : }
2125 : else
2126 : {
2127 : char *cp;
2128 : int flen;
2129 :
2130 30 : flen = strlen(field[i]);
2131 30 : cp = strchr(field[i], '.');
2132 :
2133 : /* Embedded decimal? */
2134 30 : if (cp != NULL)
2135 : {
2136 : /*
2137 : * Under limited circumstances, we will accept a
2138 : * date...
2139 : */
2140 18 : if (i == 0 && nf >= 2 && ftype[nf - 1] == DTK_DATE)
2141 : {
2142 0 : dterr = DecodeDate(field[i], fmask,
2143 : &tmask, &is2digits, tm);
2144 0 : if (dterr)
2145 0 : return dterr;
2146 : }
2147 : /* embedded decimal and several digits before? */
2148 18 : else if (flen - strlen(cp) > 2)
2149 : {
2150 : /*
2151 : * Interpret as a concatenated date or time Set
2152 : * the type field to allow decoding other fields
2153 : * later. Example: 20011223 or 040506
2154 : */
2155 18 : dterr = DecodeNumberField(flen, field[i],
2156 : (fmask | DTK_DATE_M),
2157 : &tmask, tm,
2158 : fsec, &is2digits);
2159 18 : if (dterr < 0)
2160 0 : return dterr;
2161 18 : ftype[i] = dterr;
2162 : }
2163 : else
2164 0 : return DTERR_BAD_FORMAT;
2165 : }
2166 12 : else if (flen > 4)
2167 : {
2168 6 : dterr = DecodeNumberField(flen, field[i],
2169 : (fmask | DTK_DATE_M),
2170 : &tmask, tm,
2171 : fsec, &is2digits);
2172 6 : if (dterr < 0)
2173 0 : return dterr;
2174 6 : ftype[i] = dterr;
2175 : }
2176 : /* otherwise it is a single date/time field... */
2177 : else
2178 : {
2179 6 : dterr = DecodeNumber(flen, field[i],
2180 : false,
2181 : (fmask | DTK_DATE_M),
2182 : &tmask, tm,
2183 : fsec, &is2digits);
2184 6 : if (dterr)
2185 0 : return dterr;
2186 : }
2187 : }
2188 78 : break;
2189 :
2190 222 : case DTK_STRING:
2191 : case DTK_SPECIAL:
2192 : /* timezone abbrevs take precedence over built-in tokens */
2193 222 : dterr = DecodeTimezoneAbbrev(i, field[i],
2194 : &type, &val, &valtz, extra);
2195 222 : if (dterr)
2196 0 : return dterr;
2197 222 : if (type == UNKNOWN_FIELD)
2198 90 : type = DecodeSpecial(i, field[i], &val);
2199 222 : if (type == IGNORE_DTF)
2200 0 : continue;
2201 :
2202 222 : tmask = DTK_M(type);
2203 222 : switch (type)
2204 : {
2205 6 : case RESERV:
2206 6 : switch (val)
2207 : {
2208 6 : case DTK_NOW:
2209 6 : tmask = DTK_TIME_M;
2210 6 : *dtype = DTK_TIME;
2211 6 : GetCurrentTimeUsec(tm, fsec, NULL);
2212 6 : break;
2213 :
2214 0 : case DTK_ZULU:
2215 0 : tmask = (DTK_TIME_M | DTK_M(TZ));
2216 0 : *dtype = DTK_TIME;
2217 0 : tm->tm_hour = 0;
2218 0 : tm->tm_min = 0;
2219 0 : tm->tm_sec = 0;
2220 0 : tm->tm_isdst = 0;
2221 0 : break;
2222 :
2223 0 : default:
2224 0 : return DTERR_BAD_FORMAT;
2225 : }
2226 :
2227 6 : break;
2228 :
2229 0 : case DTZMOD:
2230 :
2231 : /*
2232 : * daylight savings time modifier (solves "MET DST"
2233 : * syntax)
2234 : */
2235 0 : tmask |= DTK_M(DTZ);
2236 0 : tm->tm_isdst = 1;
2237 0 : if (tzp == NULL)
2238 0 : return DTERR_BAD_FORMAT;
2239 0 : *tzp -= val;
2240 0 : break;
2241 :
2242 99 : case DTZ:
2243 :
2244 : /*
2245 : * set mask for TZ here _or_ check for DTZ later when
2246 : * getting default timezone
2247 : */
2248 99 : tmask |= DTK_M(TZ);
2249 99 : tm->tm_isdst = 1;
2250 99 : if (tzp == NULL)
2251 0 : return DTERR_BAD_FORMAT;
2252 99 : *tzp = -val;
2253 99 : ftype[i] = DTK_TZ;
2254 99 : break;
2255 :
2256 30 : case TZ:
2257 30 : tm->tm_isdst = 0;
2258 30 : if (tzp == NULL)
2259 0 : return DTERR_BAD_FORMAT;
2260 30 : *tzp = -val;
2261 30 : ftype[i] = DTK_TZ;
2262 30 : break;
2263 :
2264 3 : case DYNTZ:
2265 3 : tmask |= DTK_M(TZ);
2266 3 : if (tzp == NULL)
2267 0 : return DTERR_BAD_FORMAT;
2268 : /* we'll determine the actual offset later */
2269 3 : abbrevTz = valtz;
2270 3 : abbrev = field[i];
2271 3 : ftype[i] = DTK_TZ;
2272 3 : break;
2273 :
2274 6 : case AMPM:
2275 6 : mer = val;
2276 6 : break;
2277 :
2278 0 : case ADBC:
2279 0 : bc = (val == BC);
2280 0 : break;
2281 :
2282 9 : case UNITS:
2283 9 : tmask = 0;
2284 : /* reject consecutive unhandled units */
2285 9 : if (ptype != 0)
2286 0 : return DTERR_BAD_FORMAT;
2287 9 : ptype = val;
2288 9 : break;
2289 :
2290 69 : case ISOTIME:
2291 69 : tmask = 0;
2292 : /* reject consecutive unhandled units */
2293 69 : if (ptype != 0)
2294 0 : return DTERR_BAD_FORMAT;
2295 69 : ptype = val;
2296 69 : break;
2297 :
2298 0 : case UNKNOWN_FIELD:
2299 :
2300 : /*
2301 : * Before giving up and declaring error, check to see
2302 : * if it is an all-alpha timezone name.
2303 : */
2304 0 : namedTz = pg_tzset(field[i]);
2305 0 : if (!namedTz)
2306 0 : return DTERR_BAD_FORMAT;
2307 : /* we'll apply the zone setting below */
2308 0 : tmask = DTK_M(TZ);
2309 0 : break;
2310 :
2311 0 : default:
2312 0 : return DTERR_BAD_FORMAT;
2313 : }
2314 222 : break;
2315 :
2316 0 : default:
2317 0 : return DTERR_BAD_FORMAT;
2318 : }
2319 :
2320 3364 : if (tmask & fmask)
2321 0 : return DTERR_BAD_FORMAT;
2322 3364 : fmask |= tmask;
2323 : } /* end loop over fields */
2324 :
2325 : /* reject if prefix type appeared and was never handled */
2326 2123 : if (ptype != 0)
2327 0 : return DTERR_BAD_FORMAT;
2328 :
2329 : /* do final checking/adjustment of Y/M/D fields */
2330 2123 : dterr = ValidateDate(fmask, isjulian, is2digits, bc, tm);
2331 2123 : if (dterr)
2332 0 : return dterr;
2333 :
2334 : /* handle AM/PM */
2335 2123 : if (mer != HR24 && tm->tm_hour > HOURS_PER_DAY / 2)
2336 0 : return DTERR_FIELD_OVERFLOW;
2337 2123 : if (mer == AM && tm->tm_hour == HOURS_PER_DAY / 2)
2338 0 : tm->tm_hour = 0;
2339 2123 : else if (mer == PM && tm->tm_hour != HOURS_PER_DAY / 2)
2340 6 : tm->tm_hour += HOURS_PER_DAY / 2;
2341 :
2342 : /* check for time overflow */
2343 2123 : if (time_overflows(tm->tm_hour, tm->tm_min, tm->tm_sec, *fsec))
2344 36 : return DTERR_FIELD_OVERFLOW;
2345 :
2346 2087 : if ((fmask & DTK_TIME_M) != DTK_TIME_M)
2347 0 : return DTERR_BAD_FORMAT;
2348 :
2349 : /*
2350 : * If we had a full timezone spec, compute the offset (we could not do it
2351 : * before, because we may need the date to resolve DST status).
2352 : */
2353 2087 : if (namedTz != NULL)
2354 : {
2355 : long int gmtoff;
2356 :
2357 : /* daylight savings time modifier disallowed with full TZ */
2358 596 : if (fmask & DTK_M(DTZMOD))
2359 21 : return DTERR_BAD_FORMAT;
2360 :
2361 : /* if non-DST zone, we do not need to know the date */
2362 596 : if (pg_get_timezone_offset(namedTz, &gmtoff))
2363 : {
2364 557 : *tzp = -(int) gmtoff;
2365 : }
2366 : else
2367 : {
2368 : /* a date has to be specified */
2369 39 : if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2370 21 : return DTERR_BAD_FORMAT;
2371 18 : *tzp = DetermineTimeZoneOffset(tm, namedTz);
2372 : }
2373 : }
2374 :
2375 : /*
2376 : * Likewise, if we had a dynamic timezone abbreviation, resolve it now.
2377 : */
2378 2066 : if (abbrevTz != NULL)
2379 : {
2380 : struct pg_tm tt,
2381 0 : *tmp = &tt;
2382 :
2383 : /*
2384 : * daylight savings time modifier but no standard timezone? then error
2385 : */
2386 0 : if (fmask & DTK_M(DTZMOD))
2387 0 : return DTERR_BAD_FORMAT;
2388 :
2389 0 : if ((fmask & DTK_DATE_M) == 0)
2390 0 : GetCurrentDateTime(tmp);
2391 : else
2392 : {
2393 : /* a date has to be specified */
2394 0 : if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2395 0 : return DTERR_BAD_FORMAT;
2396 0 : tmp->tm_year = tm->tm_year;
2397 0 : tmp->tm_mon = tm->tm_mon;
2398 0 : tmp->tm_mday = tm->tm_mday;
2399 : }
2400 0 : tmp->tm_hour = tm->tm_hour;
2401 0 : tmp->tm_min = tm->tm_min;
2402 0 : tmp->tm_sec = tm->tm_sec;
2403 0 : *tzp = DetermineTimeZoneAbbrevOffset(tmp, abbrev, abbrevTz);
2404 0 : tm->tm_isdst = tmp->tm_isdst;
2405 : }
2406 :
2407 : /* timezone not specified? then use session timezone */
2408 2066 : if (tzp != NULL && !(fmask & DTK_M(TZ)))
2409 : {
2410 : struct pg_tm tt,
2411 1065 : *tmp = &tt;
2412 :
2413 : /*
2414 : * daylight savings time modifier but no standard timezone? then error
2415 : */
2416 1065 : if (fmask & DTK_M(DTZMOD))
2417 0 : return DTERR_BAD_FORMAT;
2418 :
2419 1065 : if ((fmask & DTK_DATE_M) == 0)
2420 1026 : GetCurrentDateTime(tmp);
2421 : else
2422 : {
2423 : /* a date has to be specified */
2424 39 : if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2425 0 : return DTERR_BAD_FORMAT;
2426 39 : tmp->tm_year = tm->tm_year;
2427 39 : tmp->tm_mon = tm->tm_mon;
2428 39 : tmp->tm_mday = tm->tm_mday;
2429 : }
2430 1065 : tmp->tm_hour = tm->tm_hour;
2431 1065 : tmp->tm_min = tm->tm_min;
2432 1065 : tmp->tm_sec = tm->tm_sec;
2433 1065 : *tzp = DetermineTimeZoneOffset(tmp, session_timezone);
2434 1065 : tm->tm_isdst = tmp->tm_isdst;
2435 : }
2436 :
2437 2066 : return 0;
2438 : }
2439 :
2440 : /* DecodeDate()
2441 : * Decode date string which includes delimiters.
2442 : * Return 0 if okay, a DTERR code if not.
2443 : *
2444 : * str: field to be parsed
2445 : * fmask: bitmask for field types already seen
2446 : * *tmask: receives bitmask for fields found here
2447 : * *is2digits: set to true if we find 2-digit year
2448 : * *tm: field values are stored into appropriate members of this struct
2449 : */
2450 : static int
2451 34285 : DecodeDate(char *str, int fmask, int *tmask, bool *is2digits,
2452 : struct pg_tm *tm)
2453 : {
2454 : fsec_t fsec;
2455 34285 : int nf = 0;
2456 : int i,
2457 : len;
2458 : int dterr;
2459 34285 : bool haveTextMonth = false;
2460 : int type,
2461 : val,
2462 34285 : dmask = 0;
2463 : char *field[MAXDATEFIELDS];
2464 :
2465 34285 : *tmask = 0;
2466 :
2467 : /* parse this string... */
2468 137107 : while (*str != '\0' && nf < MAXDATEFIELDS)
2469 : {
2470 : /* skip field separators */
2471 102822 : while (*str != '\0' && !isalnum((unsigned char) *str))
2472 0 : str++;
2473 :
2474 102822 : if (*str == '\0')
2475 0 : return DTERR_BAD_FORMAT; /* end of string after separator */
2476 :
2477 102822 : field[nf] = str;
2478 102822 : if (isdigit((unsigned char) *str))
2479 : {
2480 376797 : while (isdigit((unsigned char) *str))
2481 274047 : str++;
2482 : }
2483 72 : else if (isalpha((unsigned char) *str))
2484 : {
2485 288 : while (isalpha((unsigned char) *str))
2486 216 : str++;
2487 : }
2488 :
2489 : /* Just get rid of any non-digit, non-alpha characters... */
2490 102822 : if (*str != '\0')
2491 68555 : *str++ = '\0';
2492 102822 : nf++;
2493 : }
2494 :
2495 : /* look first for text fields, since that will be unambiguous month */
2496 137107 : for (i = 0; i < nf; i++)
2497 : {
2498 102822 : if (isalpha((unsigned char) *field[i]))
2499 : {
2500 72 : type = DecodeSpecial(i, field[i], &val);
2501 72 : if (type == IGNORE_DTF)
2502 0 : continue;
2503 :
2504 72 : dmask = DTK_M(type);
2505 72 : switch (type)
2506 : {
2507 72 : case MONTH:
2508 72 : tm->tm_mon = val;
2509 72 : haveTextMonth = true;
2510 72 : break;
2511 :
2512 0 : default:
2513 0 : return DTERR_BAD_FORMAT;
2514 : }
2515 72 : if (fmask & dmask)
2516 0 : return DTERR_BAD_FORMAT;
2517 :
2518 72 : fmask |= dmask;
2519 72 : *tmask |= dmask;
2520 :
2521 : /* mark this field as being completed */
2522 72 : field[i] = NULL;
2523 : }
2524 : }
2525 :
2526 : /* now pick up remaining numeric fields */
2527 137107 : for (i = 0; i < nf; i++)
2528 : {
2529 102822 : if (field[i] == NULL)
2530 72 : continue;
2531 :
2532 102750 : if ((len = strlen(field[i])) <= 0)
2533 0 : return DTERR_BAD_FORMAT;
2534 :
2535 102750 : dterr = DecodeNumber(len, field[i], haveTextMonth, fmask,
2536 : &dmask, tm,
2537 : &fsec, is2digits);
2538 102750 : if (dterr)
2539 0 : return dterr;
2540 :
2541 102750 : if (fmask & dmask)
2542 0 : return DTERR_BAD_FORMAT;
2543 :
2544 102750 : fmask |= dmask;
2545 102750 : *tmask |= dmask;
2546 : }
2547 :
2548 34285 : if ((fmask & ~(DTK_M(DOY) | DTK_M(TZ))) != DTK_DATE_M)
2549 18 : return DTERR_BAD_FORMAT;
2550 :
2551 : /* validation of the field values must wait until ValidateDate() */
2552 :
2553 34267 : return 0;
2554 : }
2555 :
2556 : /* ValidateDate()
2557 : * Check valid year/month/day values, handle BC and DOY cases
2558 : * Return 0 if okay, a DTERR code if not.
2559 : */
2560 : int
2561 41206 : ValidateDate(int fmask, bool isjulian, bool is2digits, bool bc,
2562 : struct pg_tm *tm)
2563 : {
2564 41206 : if (fmask & DTK_M(YEAR))
2565 : {
2566 39185 : if (isjulian)
2567 : {
2568 : /* tm_year is correct and should not be touched */
2569 : }
2570 36128 : else if (bc)
2571 : {
2572 : /* there is no year zero in AD/BC notation */
2573 164 : if (tm->tm_year <= 0)
2574 0 : return DTERR_FIELD_OVERFLOW;
2575 : /* internally, we represent 1 BC as year zero, 2 BC as -1, etc */
2576 164 : tm->tm_year = -(tm->tm_year - 1);
2577 : }
2578 35964 : else if (is2digits)
2579 : {
2580 : /* process 1 or 2-digit input as 1970-2069 AD, allow '0' and '00' */
2581 177 : if (tm->tm_year < 0) /* just paranoia */
2582 0 : return DTERR_FIELD_OVERFLOW;
2583 177 : if (tm->tm_year < 70)
2584 87 : tm->tm_year += 2000;
2585 90 : else if (tm->tm_year < 100)
2586 90 : tm->tm_year += 1900;
2587 : }
2588 : else
2589 : {
2590 : /* there is no year zero in AD/BC notation */
2591 35787 : if (tm->tm_year <= 0)
2592 6 : return DTERR_FIELD_OVERFLOW;
2593 : }
2594 : }
2595 :
2596 : /* now that we have correct year, decode DOY */
2597 41200 : if (fmask & DTK_M(DOY))
2598 : {
2599 15 : j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
2600 : &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2601 : }
2602 :
2603 : /* check for valid month */
2604 41200 : if (fmask & DTK_M(MONTH))
2605 : {
2606 39167 : if (tm->tm_mon < 1 || tm->tm_mon > MONTHS_PER_YEAR)
2607 39 : return DTERR_MD_FIELD_OVERFLOW;
2608 : }
2609 :
2610 : /* minimal check for valid day */
2611 41161 : if (fmask & DTK_M(DAY))
2612 : {
2613 39110 : if (tm->tm_mday < 1 || tm->tm_mday > 31)
2614 69 : return DTERR_MD_FIELD_OVERFLOW;
2615 : }
2616 :
2617 41092 : if ((fmask & DTK_DATE_M) == DTK_DATE_M)
2618 : {
2619 : /*
2620 : * Check for valid day of month, now that we know for sure the month
2621 : * and year. Note we don't use MD_FIELD_OVERFLOW here, since it seems
2622 : * unlikely that "Feb 29" is a YMD-order error.
2623 : */
2624 39032 : if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2625 24 : return DTERR_FIELD_OVERFLOW;
2626 : }
2627 :
2628 41068 : return 0;
2629 : }
2630 :
2631 :
2632 : /* DecodeTimeCommon()
2633 : * Decode time string which includes delimiters.
2634 : * Return 0 if okay, a DTERR code if not.
2635 : * tmask and itm are output parameters.
2636 : *
2637 : * This code is shared between the timestamp and interval cases.
2638 : * We return a struct pg_itm (of which only the tm_usec, tm_sec, tm_min,
2639 : * and tm_hour fields are used) and let the wrapper functions below
2640 : * convert and range-check as necessary.
2641 : */
2642 : static int
2643 30565 : DecodeTimeCommon(char *str, int fmask, int range,
2644 : int *tmask, struct pg_itm *itm)
2645 : {
2646 : char *cp;
2647 : int dterr;
2648 30565 : fsec_t fsec = 0;
2649 :
2650 30565 : *tmask = DTK_TIME_M;
2651 :
2652 30565 : errno = 0;
2653 30565 : itm->tm_hour = strtoi64(str, &cp, 10);
2654 30565 : if (errno == ERANGE)
2655 0 : return DTERR_FIELD_OVERFLOW;
2656 30565 : if (*cp != ':')
2657 0 : return DTERR_BAD_FORMAT;
2658 30565 : errno = 0;
2659 30565 : itm->tm_min = strtoint(cp + 1, &cp, 10);
2660 30565 : if (errno == ERANGE)
2661 0 : return DTERR_FIELD_OVERFLOW;
2662 30565 : if (*cp == '\0')
2663 : {
2664 863 : itm->tm_sec = 0;
2665 : /* If it's a MINUTE TO SECOND interval, take 2 fields as being mm:ss */
2666 863 : if (range == (INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND)))
2667 : {
2668 9 : if (itm->tm_hour > INT_MAX || itm->tm_hour < INT_MIN)
2669 0 : return DTERR_FIELD_OVERFLOW;
2670 9 : itm->tm_sec = itm->tm_min;
2671 9 : itm->tm_min = (int) itm->tm_hour;
2672 9 : itm->tm_hour = 0;
2673 : }
2674 : }
2675 29702 : else if (*cp == '.')
2676 : {
2677 : /* always assume mm:ss.sss is MINUTE TO SECOND */
2678 24 : dterr = ParseFractionalSecond(cp, &fsec);
2679 24 : if (dterr)
2680 6 : return dterr;
2681 18 : if (itm->tm_hour > INT_MAX || itm->tm_hour < INT_MIN)
2682 0 : return DTERR_FIELD_OVERFLOW;
2683 18 : itm->tm_sec = itm->tm_min;
2684 18 : itm->tm_min = (int) itm->tm_hour;
2685 18 : itm->tm_hour = 0;
2686 : }
2687 29678 : else if (*cp == ':')
2688 : {
2689 29678 : errno = 0;
2690 29678 : itm->tm_sec = strtoint(cp + 1, &cp, 10);
2691 29678 : if (errno == ERANGE)
2692 0 : return DTERR_FIELD_OVERFLOW;
2693 29678 : if (*cp == '.')
2694 : {
2695 11366 : dterr = ParseFractionalSecond(cp, &fsec);
2696 11366 : if (dterr)
2697 0 : return dterr;
2698 : }
2699 18312 : else if (*cp != '\0')
2700 0 : return DTERR_BAD_FORMAT;
2701 : }
2702 : else
2703 0 : return DTERR_BAD_FORMAT;
2704 :
2705 : /* do a sanity check; but caller must check the range of tm_hour */
2706 30559 : if (itm->tm_hour < 0 ||
2707 30559 : itm->tm_min < 0 || itm->tm_min > MINS_PER_HOUR - 1 ||
2708 30559 : itm->tm_sec < 0 || itm->tm_sec > SECS_PER_MINUTE ||
2709 30559 : fsec < 0 || fsec > USECS_PER_SEC)
2710 0 : return DTERR_FIELD_OVERFLOW;
2711 :
2712 30559 : itm->tm_usec = (int) fsec;
2713 :
2714 30559 : return 0;
2715 : }
2716 :
2717 : /* DecodeTime()
2718 : * Decode time string which includes delimiters.
2719 : * Return 0 if okay, a DTERR code if not.
2720 : *
2721 : * This version is used for timestamps. The results are returned into
2722 : * the tm_hour/tm_min/tm_sec fields of *tm, and microseconds into *fsec.
2723 : */
2724 : static int
2725 29564 : DecodeTime(char *str, int fmask, int range,
2726 : int *tmask, struct pg_tm *tm, fsec_t *fsec)
2727 : {
2728 : struct pg_itm itm;
2729 : int dterr;
2730 :
2731 29564 : dterr = DecodeTimeCommon(str, fmask, range,
2732 : tmask, &itm);
2733 29564 : if (dterr)
2734 0 : return dterr;
2735 :
2736 29564 : if (itm.tm_hour > INT_MAX)
2737 0 : return DTERR_FIELD_OVERFLOW;
2738 29564 : tm->tm_hour = (int) itm.tm_hour;
2739 29564 : tm->tm_min = itm.tm_min;
2740 29564 : tm->tm_sec = itm.tm_sec;
2741 29564 : *fsec = itm.tm_usec;
2742 :
2743 29564 : return 0;
2744 : }
2745 :
2746 : /* DecodeTimeForInterval()
2747 : * Decode time string which includes delimiters.
2748 : * Return 0 if okay, a DTERR code if not.
2749 : *
2750 : * This version is used for intervals. The results are returned into
2751 : * itm_in->tm_usec.
2752 : */
2753 : static int
2754 1001 : DecodeTimeForInterval(char *str, int fmask, int range,
2755 : int *tmask, struct pg_itm_in *itm_in)
2756 : {
2757 : struct pg_itm itm;
2758 : int dterr;
2759 :
2760 1001 : dterr = DecodeTimeCommon(str, fmask, range,
2761 : tmask, &itm);
2762 1001 : if (dterr)
2763 6 : return dterr;
2764 :
2765 995 : itm_in->tm_usec = itm.tm_usec;
2766 995 : if (!int64_multiply_add(itm.tm_hour, USECS_PER_HOUR, &itm_in->tm_usec) ||
2767 995 : !int64_multiply_add(itm.tm_min, USECS_PER_MINUTE, &itm_in->tm_usec) ||
2768 995 : !int64_multiply_add(itm.tm_sec, USECS_PER_SEC, &itm_in->tm_usec))
2769 3 : return DTERR_FIELD_OVERFLOW;
2770 :
2771 992 : return 0;
2772 : }
2773 :
2774 :
2775 : /* DecodeNumber()
2776 : * Interpret plain numeric field as a date value in context.
2777 : * Return 0 if okay, a DTERR code if not.
2778 : */
2779 : static int
2780 105694 : DecodeNumber(int flen, char *str, bool haveTextMonth, int fmask,
2781 : int *tmask, struct pg_tm *tm, fsec_t *fsec, bool *is2digits)
2782 : {
2783 : int val;
2784 : char *cp;
2785 : int dterr;
2786 :
2787 105694 : *tmask = 0;
2788 :
2789 105694 : errno = 0;
2790 105694 : val = strtoint(str, &cp, 10);
2791 105694 : if (errno == ERANGE)
2792 0 : return DTERR_FIELD_OVERFLOW;
2793 105694 : if (cp == str)
2794 0 : return DTERR_BAD_FORMAT;
2795 :
2796 105694 : if (*cp == '.')
2797 : {
2798 : /*
2799 : * More than two digits before decimal point? Then could be a date or
2800 : * a run-together time: 2001.360 20011225 040506.789
2801 : */
2802 0 : if (cp - str > 2)
2803 : {
2804 0 : dterr = DecodeNumberField(flen, str,
2805 : (fmask | DTK_DATE_M),
2806 : tmask, tm,
2807 : fsec, is2digits);
2808 0 : if (dterr < 0)
2809 0 : return dterr;
2810 0 : return 0;
2811 : }
2812 :
2813 0 : dterr = ParseFractionalSecond(cp, fsec);
2814 0 : if (dterr)
2815 0 : return dterr;
2816 : }
2817 105694 : else if (*cp != '\0')
2818 0 : return DTERR_BAD_FORMAT;
2819 :
2820 : /* Special case for day of year */
2821 105694 : if (flen == 3 && (fmask & DTK_DATE_M) == DTK_M(YEAR) && val >= 1 &&
2822 : val <= 366)
2823 : {
2824 27 : *tmask = (DTK_M(DOY) | DTK_M(MONTH) | DTK_M(DAY));
2825 27 : tm->tm_yday = val;
2826 : /* tm_mon and tm_mday can't actually be set yet ... */
2827 27 : return 0;
2828 : }
2829 :
2830 : /* Switch based on what we have so far */
2831 105667 : switch (fmask & DTK_DATE_M)
2832 : {
2833 34380 : case 0:
2834 :
2835 : /*
2836 : * Nothing so far; make a decision about what we think the input
2837 : * is. There used to be lots of heuristics here, but the
2838 : * consensus now is to be paranoid. It *must* be either
2839 : * YYYY-MM-DD (with a more-than-two-digit year field), or the
2840 : * field order defined by DateOrder.
2841 : */
2842 34380 : if (flen >= 3 || DateOrder == DATEORDER_YMD)
2843 : {
2844 33486 : *tmask = DTK_M(YEAR);
2845 33486 : tm->tm_year = val;
2846 : }
2847 894 : else if (DateOrder == DATEORDER_DMY)
2848 : {
2849 82 : *tmask = DTK_M(DAY);
2850 82 : tm->tm_mday = val;
2851 : }
2852 : else
2853 : {
2854 812 : *tmask = DTK_M(MONTH);
2855 812 : tm->tm_mon = val;
2856 : }
2857 34380 : break;
2858 :
2859 33432 : case (DTK_M(YEAR)):
2860 : /* Must be at second field of YY-MM-DD */
2861 33432 : *tmask = DTK_M(MONTH);
2862 33432 : tm->tm_mon = val;
2863 33432 : break;
2864 :
2865 2123 : case (DTK_M(MONTH)):
2866 2123 : if (haveTextMonth)
2867 : {
2868 : /*
2869 : * We are at the first numeric field of a date that included a
2870 : * textual month name. We want to support the variants
2871 : * MON-DD-YYYY, DD-MON-YYYY, and YYYY-MON-DD as unambiguous
2872 : * inputs. We will also accept MON-DD-YY or DD-MON-YY in
2873 : * either DMY or MDY modes, as well as YY-MON-DD in YMD mode.
2874 : */
2875 1339 : if (flen >= 3 || DateOrder == DATEORDER_YMD)
2876 : {
2877 36 : *tmask = DTK_M(YEAR);
2878 36 : tm->tm_year = val;
2879 : }
2880 : else
2881 : {
2882 1303 : *tmask = DTK_M(DAY);
2883 1303 : tm->tm_mday = val;
2884 : }
2885 : }
2886 : else
2887 : {
2888 : /* Must be at second field of MM-DD-YY */
2889 784 : *tmask = DTK_M(DAY);
2890 784 : tm->tm_mday = val;
2891 : }
2892 2123 : break;
2893 :
2894 33471 : case (DTK_M(YEAR) | DTK_M(MONTH)):
2895 33471 : if (haveTextMonth)
2896 : {
2897 : /* Need to accept DD-MON-YYYY even in YMD mode */
2898 63 : if (flen >= 3 && *is2digits)
2899 : {
2900 : /* Guess that first numeric field is day was wrong */
2901 15 : *tmask = DTK_M(DAY); /* YEAR is already set */
2902 15 : tm->tm_mday = tm->tm_year;
2903 15 : tm->tm_year = val;
2904 15 : *is2digits = false;
2905 : }
2906 : else
2907 : {
2908 48 : *tmask = DTK_M(DAY);
2909 48 : tm->tm_mday = val;
2910 : }
2911 : }
2912 : else
2913 : {
2914 : /* Must be at third field of YY-MM-DD */
2915 33408 : *tmask = DTK_M(DAY);
2916 33408 : tm->tm_mday = val;
2917 : }
2918 33471 : break;
2919 :
2920 73 : case (DTK_M(DAY)):
2921 : /* Must be at second field of DD-MM-YY */
2922 73 : *tmask = DTK_M(MONTH);
2923 73 : tm->tm_mon = val;
2924 73 : break;
2925 :
2926 2176 : case (DTK_M(MONTH) | DTK_M(DAY)):
2927 : /* Must be at third field of DD-MM-YY or MM-DD-YY */
2928 2176 : *tmask = DTK_M(YEAR);
2929 2176 : tm->tm_year = val;
2930 2176 : break;
2931 :
2932 12 : case (DTK_M(YEAR) | DTK_M(MONTH) | DTK_M(DAY)):
2933 : /* we have all the date, so it must be a time field */
2934 12 : dterr = DecodeNumberField(flen, str, fmask,
2935 : tmask, tm,
2936 : fsec, is2digits);
2937 12 : if (dterr < 0)
2938 6 : return dterr;
2939 6 : return 0;
2940 :
2941 0 : default:
2942 : /* Anything else is bogus input */
2943 0 : return DTERR_BAD_FORMAT;
2944 : }
2945 :
2946 : /*
2947 : * When processing a year field, mark it for adjustment if it's only one
2948 : * or two digits.
2949 : */
2950 105655 : if (*tmask == DTK_M(YEAR))
2951 35698 : *is2digits = (flen <= 2);
2952 :
2953 105655 : return 0;
2954 : }
2955 :
2956 :
2957 : /* DecodeNumberField()
2958 : * Interpret numeric string as a concatenated date or time field.
2959 : * Return a DTK token (>= 0) if successful, a DTERR code (< 0) if not.
2960 : *
2961 : * Use the context of previously decoded fields to help with
2962 : * the interpretation.
2963 : */
2964 : static int
2965 295 : DecodeNumberField(int len, char *str, int fmask,
2966 : int *tmask, struct pg_tm *tm, fsec_t *fsec, bool *is2digits)
2967 : {
2968 : char *cp;
2969 :
2970 : /*
2971 : * This function was originally meant to cope only with DTK_NUMBER fields,
2972 : * but we now sometimes abuse it to parse (parts of) DTK_DATE fields,
2973 : * which can contain letters and other punctuation. Reject if it's not a
2974 : * valid DTK_NUMBER, that is digits and decimal point(s). (ParseFraction
2975 : * will reject if there's more than one decimal point.)
2976 : */
2977 295 : if (strspn(str, "0123456789.") != len)
2978 6 : return DTERR_BAD_FORMAT;
2979 :
2980 : /*
2981 : * Have a decimal point? Then this is a date or something with a seconds
2982 : * field...
2983 : */
2984 289 : if ((cp = strchr(str, '.')) != NULL)
2985 : {
2986 : int dterr;
2987 :
2988 : /* Convert the fraction and store at *fsec */
2989 69 : dterr = ParseFractionalSecond(cp, fsec);
2990 69 : if (dterr)
2991 0 : return dterr;
2992 : /* Now truncate off the fraction for further processing */
2993 69 : *cp = '\0';
2994 69 : len = strlen(str);
2995 : }
2996 : /* No decimal point and no complete date yet? */
2997 220 : else if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2998 : {
2999 124 : if (len >= 6)
3000 : {
3001 124 : *tmask = DTK_DATE_M;
3002 :
3003 : /*
3004 : * Start from end and consider first 2 as Day, next 2 as Month,
3005 : * and the rest as Year.
3006 : */
3007 124 : tm->tm_mday = atoi(str + (len - 2));
3008 124 : *(str + (len - 2)) = '\0';
3009 124 : tm->tm_mon = atoi(str + (len - 4));
3010 124 : *(str + (len - 4)) = '\0';
3011 124 : tm->tm_year = atoi(str);
3012 124 : if ((len - 4) == 2)
3013 9 : *is2digits = true;
3014 :
3015 124 : return DTK_DATE;
3016 : }
3017 : }
3018 :
3019 : /* not all time fields are specified? */
3020 165 : if ((fmask & DTK_TIME_M) != DTK_TIME_M)
3021 : {
3022 : /* hhmmss */
3023 165 : if (len == 6)
3024 : {
3025 141 : *tmask = DTK_TIME_M;
3026 141 : tm->tm_sec = atoi(str + 4);
3027 141 : *(str + 4) = '\0';
3028 141 : tm->tm_min = atoi(str + 2);
3029 141 : *(str + 2) = '\0';
3030 141 : tm->tm_hour = atoi(str);
3031 :
3032 141 : return DTK_TIME;
3033 : }
3034 : /* hhmm? */
3035 24 : else if (len == 4)
3036 : {
3037 12 : *tmask = DTK_TIME_M;
3038 12 : tm->tm_sec = 0;
3039 12 : tm->tm_min = atoi(str + 2);
3040 12 : *(str + 2) = '\0';
3041 12 : tm->tm_hour = atoi(str);
3042 :
3043 12 : return DTK_TIME;
3044 : }
3045 : }
3046 :
3047 12 : return DTERR_BAD_FORMAT;
3048 : }
3049 :
3050 :
3051 : /* DecodeTimezone()
3052 : * Interpret string as a numeric timezone.
3053 : *
3054 : * Return 0 if okay (and set *tzp), a DTERR code if not okay.
3055 : */
3056 : int
3057 18852 : DecodeTimezone(const char *str, int *tzp)
3058 : {
3059 : int tz;
3060 : int hr,
3061 : min,
3062 18852 : sec = 0;
3063 : char *cp;
3064 :
3065 : /* leading character must be "+" or "-" */
3066 18852 : if (*str != '+' && *str != '-')
3067 36 : return DTERR_BAD_FORMAT;
3068 :
3069 18816 : errno = 0;
3070 18816 : hr = strtoint(str + 1, &cp, 10);
3071 18816 : if (errno == ERANGE)
3072 0 : return DTERR_TZDISP_OVERFLOW;
3073 :
3074 : /* explicit delimiter? */
3075 18816 : if (*cp == ':')
3076 : {
3077 54 : errno = 0;
3078 54 : min = strtoint(cp + 1, &cp, 10);
3079 54 : if (errno == ERANGE)
3080 0 : return DTERR_TZDISP_OVERFLOW;
3081 54 : if (*cp == ':')
3082 : {
3083 12 : errno = 0;
3084 12 : sec = strtoint(cp + 1, &cp, 10);
3085 12 : if (errno == ERANGE)
3086 0 : return DTERR_TZDISP_OVERFLOW;
3087 : }
3088 : }
3089 : /* otherwise, might have run things together... */
3090 18762 : else if (*cp == '\0' && strlen(str) > 3)
3091 : {
3092 36 : min = hr % 100;
3093 36 : hr = hr / 100;
3094 : /* we could, but don't, support a run-together hhmmss format */
3095 : }
3096 : else
3097 18726 : min = 0;
3098 :
3099 : /* Range-check the values; see notes in datatype/timestamp.h */
3100 18816 : if (hr < 0 || hr > MAX_TZDISP_HOUR)
3101 6 : return DTERR_TZDISP_OVERFLOW;
3102 18810 : if (min < 0 || min >= MINS_PER_HOUR)
3103 6 : return DTERR_TZDISP_OVERFLOW;
3104 18804 : if (sec < 0 || sec >= SECS_PER_MINUTE)
3105 0 : return DTERR_TZDISP_OVERFLOW;
3106 :
3107 18804 : tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE + sec;
3108 18804 : if (*str == '-')
3109 419 : tz = -tz;
3110 :
3111 18804 : *tzp = -tz;
3112 :
3113 18804 : if (*cp != '\0')
3114 0 : return DTERR_BAD_FORMAT;
3115 :
3116 18804 : return 0;
3117 : }
3118 :
3119 :
3120 : /* DecodeTimezoneAbbrev()
3121 : * Interpret string as a timezone abbreviation, if possible.
3122 : *
3123 : * Sets *ftype to an abbreviation type (TZ, DTZ, or DYNTZ), or UNKNOWN_FIELD if
3124 : * string is not any known abbreviation. On success, set *offset and *tz to
3125 : * represent the UTC offset (for TZ or DTZ) or underlying zone (for DYNTZ).
3126 : * Note that full timezone names (such as America/New_York) are not handled
3127 : * here, mostly for historical reasons.
3128 : *
3129 : * The function result is 0 or a DTERR code; in the latter case, *extra
3130 : * is filled as needed. Note that unknown-abbreviation is not considered
3131 : * an error case. Also note that many callers assume that the DTERR code
3132 : * is one that DateTimeParseError does not require "str" or "datatype"
3133 : * strings for.
3134 : *
3135 : * Given string must be lowercased already.
3136 : *
3137 : * Implement a cache lookup since it is likely that dates
3138 : * will be related in format.
3139 : */
3140 : int
3141 5453 : DecodeTimezoneAbbrev(int field, const char *lowtoken,
3142 : int *ftype, int *offset, pg_tz **tz,
3143 : DateTimeErrorExtra *extra)
3144 : {
3145 5453 : TzAbbrevCache *tzc = &tzabbrevcache[field];
3146 : bool isfixed;
3147 : int isdst;
3148 : const datetkn *tp;
3149 :
3150 : /*
3151 : * Do we have a cached result? Use strncmp so that we match truncated
3152 : * names, although we shouldn't really see that happen with normal
3153 : * abbreviations.
3154 : */
3155 5453 : if (strncmp(lowtoken, tzc->abbrev, TOKMAXLEN) == 0)
3156 : {
3157 1369 : *ftype = tzc->ftype;
3158 1369 : *offset = tzc->offset;
3159 1369 : *tz = tzc->tz;
3160 1369 : return 0;
3161 : }
3162 :
3163 : /*
3164 : * See if the current session_timezone recognizes it. Checking this
3165 : * before zoneabbrevtbl allows us to correctly handle abbreviations whose
3166 : * meaning varies across zones, such as "LMT".
3167 : */
3168 8168 : if (session_timezone &&
3169 4084 : TimeZoneAbbrevIsKnown(lowtoken, session_timezone,
3170 : &isfixed, offset, &isdst))
3171 : {
3172 120 : *ftype = (isfixed ? (isdst ? DTZ : TZ) : DYNTZ);
3173 120 : *tz = (isfixed ? NULL : session_timezone);
3174 : /* flip sign to agree with the convention used in zoneabbrevtbl */
3175 120 : *offset = -(*offset);
3176 : /* cache result; use strlcpy to truncate name if necessary */
3177 120 : strlcpy(tzc->abbrev, lowtoken, TOKMAXLEN + 1);
3178 120 : tzc->ftype = *ftype;
3179 120 : tzc->offset = *offset;
3180 120 : tzc->tz = *tz;
3181 120 : return 0;
3182 : }
3183 :
3184 : /* Nope, so look in zoneabbrevtbl */
3185 3964 : if (zoneabbrevtbl)
3186 3964 : tp = datebsearch(lowtoken, zoneabbrevtbl->abbrevs,
3187 3964 : zoneabbrevtbl->numabbrevs);
3188 : else
3189 0 : tp = NULL;
3190 3964 : if (tp == NULL)
3191 : {
3192 3846 : *ftype = UNKNOWN_FIELD;
3193 3846 : *offset = 0;
3194 3846 : *tz = NULL;
3195 : /* failure results are not cached */
3196 : }
3197 : else
3198 : {
3199 118 : *ftype = tp->type;
3200 118 : if (tp->type == DYNTZ)
3201 : {
3202 15 : *offset = 0;
3203 15 : *tz = FetchDynamicTimeZone(zoneabbrevtbl, tp, extra);
3204 15 : if (*tz == NULL)
3205 0 : return DTERR_BAD_ZONE_ABBREV;
3206 : }
3207 : else
3208 : {
3209 103 : *offset = tp->value;
3210 103 : *tz = NULL;
3211 : }
3212 :
3213 : /* cache result; use strlcpy to truncate name if necessary */
3214 118 : strlcpy(tzc->abbrev, lowtoken, TOKMAXLEN + 1);
3215 118 : tzc->ftype = *ftype;
3216 118 : tzc->offset = *offset;
3217 118 : tzc->tz = *tz;
3218 : }
3219 :
3220 3964 : return 0;
3221 : }
3222 :
3223 : /*
3224 : * Reset tzabbrevcache after a change in session_timezone.
3225 : */
3226 : void
3227 8630 : ClearTimeZoneAbbrevCache(void)
3228 : {
3229 8630 : memset(tzabbrevcache, 0, sizeof(tzabbrevcache));
3230 8630 : }
3231 :
3232 :
3233 : /* DecodeSpecial()
3234 : * Decode text string using lookup table.
3235 : *
3236 : * Recognizes the keywords listed in datetktbl.
3237 : * Note: at one time this would also recognize timezone abbreviations,
3238 : * but no more; use DecodeTimezoneAbbrev for that.
3239 : *
3240 : * Given string must be lowercased already.
3241 : *
3242 : * Implement a cache lookup since it is likely that dates
3243 : * will be related in format.
3244 : */
3245 : int
3246 21285 : DecodeSpecial(int field, const char *lowtoken, int *val)
3247 : {
3248 : int type;
3249 : const datetkn *tp;
3250 :
3251 21285 : tp = datecache[field];
3252 : /* use strncmp so that we match truncated tokens */
3253 21285 : if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
3254 : {
3255 4956 : tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
3256 : }
3257 21285 : if (tp == NULL)
3258 : {
3259 57 : type = UNKNOWN_FIELD;
3260 57 : *val = 0;
3261 : }
3262 : else
3263 : {
3264 21228 : datecache[field] = tp;
3265 21228 : type = tp->type;
3266 21228 : *val = tp->value;
3267 : }
3268 :
3269 21285 : return type;
3270 : }
3271 :
3272 :
3273 : /* DecodeTimezoneName()
3274 : * Interpret string as a timezone abbreviation or name.
3275 : * Throw error if the name is not recognized.
3276 : *
3277 : * The return value indicates what kind of zone identifier it is:
3278 : * TZNAME_FIXED_OFFSET: fixed offset from UTC
3279 : * TZNAME_DYNTZ: dynamic timezone abbreviation
3280 : * TZNAME_ZONE: full tzdb zone name
3281 : *
3282 : * For TZNAME_FIXED_OFFSET, *offset receives the UTC offset (in seconds,
3283 : * with ISO sign convention: positive is east of Greenwich).
3284 : * For the other two cases, *tz receives the timezone struct representing
3285 : * the zone name or the abbreviation's underlying zone.
3286 : */
3287 : int
3288 417 : DecodeTimezoneName(const char *tzname, int *offset, pg_tz **tz)
3289 : {
3290 : char *lowzone;
3291 : int dterr,
3292 : type;
3293 : DateTimeErrorExtra extra;
3294 :
3295 : /*
3296 : * First we look in the timezone abbreviation table (to handle cases like
3297 : * "EST"), and if that fails, we look in the timezone database (to handle
3298 : * cases like "America/New_York"). This matches the order in which
3299 : * timestamp input checks the cases; it's important because the timezone
3300 : * database unwisely uses a few zone names that are identical to offset
3301 : * abbreviations.
3302 : */
3303 :
3304 : /* DecodeTimezoneAbbrev requires lowercase input */
3305 417 : lowzone = downcase_truncate_identifier(tzname,
3306 417 : strlen(tzname),
3307 : false);
3308 :
3309 417 : dterr = DecodeTimezoneAbbrev(0, lowzone, &type, offset, tz, &extra);
3310 417 : if (dterr)
3311 0 : DateTimeParseError(dterr, &extra, NULL, NULL, NULL);
3312 :
3313 417 : if (type == TZ || type == DTZ)
3314 : {
3315 : /* fixed-offset abbreviation, return the offset */
3316 153 : return TZNAME_FIXED_OFFSET;
3317 : }
3318 264 : else if (type == DYNTZ)
3319 : {
3320 : /* dynamic-offset abbreviation, return its referenced timezone */
3321 87 : return TZNAME_DYNTZ;
3322 : }
3323 : else
3324 : {
3325 : /* try it as a full zone name */
3326 177 : *tz = pg_tzset(tzname);
3327 177 : if (*tz == NULL)
3328 6 : ereport(ERROR,
3329 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
3330 : errmsg("time zone \"%s\" not recognized", tzname)));
3331 171 : return TZNAME_ZONE;
3332 : }
3333 : }
3334 :
3335 : /* DecodeTimezoneNameToTz()
3336 : * Interpret string as a timezone abbreviation or name.
3337 : * Throw error if the name is not recognized.
3338 : *
3339 : * This is a simple wrapper for DecodeTimezoneName that produces a pg_tz *
3340 : * result in all cases.
3341 : */
3342 : pg_tz *
3343 48 : DecodeTimezoneNameToTz(const char *tzname)
3344 : {
3345 : pg_tz *result;
3346 : int offset;
3347 :
3348 48 : if (DecodeTimezoneName(tzname, &offset, &result) == TZNAME_FIXED_OFFSET)
3349 : {
3350 : /* fixed-offset abbreviation, get a pg_tz descriptor for that */
3351 15 : result = pg_tzset_offset(-offset); /* flip to POSIX sign convention */
3352 : }
3353 48 : return result;
3354 : }
3355 :
3356 : /* DecodeTimezoneAbbrevPrefix()
3357 : * Interpret prefix of string as a timezone abbreviation, if possible.
3358 : *
3359 : * This has roughly the same functionality as DecodeTimezoneAbbrev(),
3360 : * but the API is adapted to the needs of formatting.c. Notably,
3361 : * we will match the longest possible prefix of the given string
3362 : * rather than insisting on a complete match, and downcasing is applied
3363 : * here rather than in the caller.
3364 : *
3365 : * Returns the length of the timezone abbreviation, or -1 if not recognized.
3366 : * On success, sets *offset to the GMT offset for the abbreviation if it
3367 : * is a fixed-offset abbreviation, or sets *tz to the pg_tz struct for
3368 : * a dynamic abbreviation.
3369 : */
3370 : int
3371 1779 : DecodeTimezoneAbbrevPrefix(const char *str, int *offset, pg_tz **tz)
3372 : {
3373 : char lowtoken[TOKMAXLEN + 1];
3374 : int len;
3375 :
3376 1779 : *offset = 0; /* avoid uninitialized vars on failure */
3377 1779 : *tz = NULL;
3378 :
3379 : /* Downcase as much of the string as we could need */
3380 1848 : for (len = 0; len < TOKMAXLEN; len++)
3381 : {
3382 1848 : if (*str == '\0' || !isalpha((unsigned char) *str))
3383 : break;
3384 69 : lowtoken[len] = pg_tolower((unsigned char) *str++);
3385 : }
3386 1779 : lowtoken[len] = '\0';
3387 :
3388 : /*
3389 : * We could avoid doing repeated binary searches if we cared to duplicate
3390 : * datebsearch here, but it's not clear that such an optimization would be
3391 : * worth the trouble. In common cases there's probably not anything after
3392 : * the zone abbrev anyway. So just search with successively truncated
3393 : * strings.
3394 : */
3395 1800 : while (len > 0)
3396 : {
3397 : bool isfixed;
3398 : int isdst;
3399 : const datetkn *tp;
3400 :
3401 : /* See if the current session_timezone recognizes it. */
3402 78 : if (session_timezone &&
3403 39 : TimeZoneAbbrevIsKnown(lowtoken, session_timezone,
3404 : &isfixed, offset, &isdst))
3405 : {
3406 3 : if (isfixed)
3407 : {
3408 : /* flip sign to agree with the convention in zoneabbrevtbl */
3409 3 : *offset = -(*offset);
3410 : }
3411 : else
3412 : {
3413 : /* Caller must resolve the abbrev's current meaning */
3414 0 : *tz = session_timezone;
3415 : }
3416 18 : return len;
3417 : }
3418 :
3419 : /* Known in zoneabbrevtbl? */
3420 36 : if (zoneabbrevtbl)
3421 36 : tp = datebsearch(lowtoken, zoneabbrevtbl->abbrevs,
3422 36 : zoneabbrevtbl->numabbrevs);
3423 : else
3424 0 : tp = NULL;
3425 36 : if (tp != NULL)
3426 : {
3427 15 : if (tp->type == DYNTZ)
3428 : {
3429 : DateTimeErrorExtra extra;
3430 3 : pg_tz *tzp = FetchDynamicTimeZone(zoneabbrevtbl, tp,
3431 : &extra);
3432 :
3433 3 : if (tzp != NULL)
3434 : {
3435 : /* Caller must resolve the abbrev's current meaning */
3436 3 : *tz = tzp;
3437 3 : return len;
3438 : }
3439 : }
3440 : else
3441 : {
3442 : /* Fixed-offset zone abbrev, so it's easy */
3443 12 : *offset = tp->value;
3444 12 : return len;
3445 : }
3446 : }
3447 :
3448 : /* Nope, try the next shorter string. */
3449 21 : lowtoken[--len] = '\0';
3450 : }
3451 :
3452 : /* Did not find a match */
3453 1761 : return -1;
3454 : }
3455 :
3456 :
3457 : /* ClearPgItmIn
3458 : *
3459 : * Zero out a pg_itm_in
3460 : */
3461 : static inline void
3462 32979 : ClearPgItmIn(struct pg_itm_in *itm_in)
3463 : {
3464 32979 : itm_in->tm_usec = 0;
3465 32979 : itm_in->tm_mday = 0;
3466 32979 : itm_in->tm_mon = 0;
3467 32979 : itm_in->tm_year = 0;
3468 32979 : }
3469 :
3470 :
3471 : /* DecodeInterval()
3472 : * Interpret previously parsed fields for general time interval.
3473 : * Returns 0 if successful, DTERR code if bogus input detected.
3474 : * dtype and itm_in are output parameters.
3475 : *
3476 : * Allow "date" field DTK_DATE since this could be just
3477 : * an unsigned floating point number. - thomas 1997-11-16
3478 : *
3479 : * Allow ISO-style time span, with implicit units on number of days
3480 : * preceding an hh:mm:ss field. - thomas 1998-04-30
3481 : *
3482 : * itm_in remains undefined for infinite interval values for which dtype alone
3483 : * suffices.
3484 : */
3485 : int
3486 32673 : DecodeInterval(char **field, int *ftype, int nf, int range,
3487 : int *dtype, struct pg_itm_in *itm_in)
3488 : {
3489 32673 : bool force_negative = false;
3490 32673 : bool is_before = false;
3491 32673 : bool parsing_unit_val = false;
3492 : char *cp;
3493 32673 : int fmask = 0,
3494 : tmask,
3495 : type,
3496 : uval;
3497 : int i;
3498 : int dterr;
3499 : int64 val;
3500 : double fval;
3501 :
3502 32673 : *dtype = DTK_DELTA;
3503 32673 : type = IGNORE_DTF;
3504 32673 : ClearPgItmIn(itm_in);
3505 :
3506 : /*----------
3507 : * The SQL standard defines the interval literal
3508 : * '-1 1:00:00'
3509 : * to mean "negative 1 days and negative 1 hours", while Postgres
3510 : * traditionally treats this as meaning "negative 1 days and positive
3511 : * 1 hours". In SQL_STANDARD intervalstyle, we apply the leading sign
3512 : * to all fields if there are no other explicit signs.
3513 : *
3514 : * We leave the signs alone if there are additional explicit signs.
3515 : * This protects us against misinterpreting postgres-style dump output,
3516 : * since the postgres-style output code has always put an explicit sign on
3517 : * all fields following a negative field. But note that SQL-spec output
3518 : * is ambiguous and can be misinterpreted on load! (So it's best practice
3519 : * to dump in postgres style, not SQL style.)
3520 : *----------
3521 : */
3522 32673 : if (IntervalStyle == INTSTYLE_SQL_STANDARD && nf > 0 && *field[0] == '-')
3523 : {
3524 19 : force_negative = true;
3525 : /* Check for additional explicit signs */
3526 122 : for (i = 1; i < nf; i++)
3527 : {
3528 112 : if (*field[i] == '-' || *field[i] == '+')
3529 : {
3530 9 : force_negative = false;
3531 9 : break;
3532 : }
3533 : }
3534 : }
3535 :
3536 : /* read through list backwards to pick up units before values */
3537 98839 : for (i = nf - 1; i >= 0; i--)
3538 : {
3539 66712 : switch (ftype[i])
3540 : {
3541 617 : case DTK_TIME:
3542 617 : dterr = DecodeTimeForInterval(field[i], fmask, range,
3543 : &tmask, itm_in);
3544 617 : if (dterr)
3545 9 : return dterr;
3546 608 : if (force_negative &&
3547 1 : itm_in->tm_usec > 0)
3548 1 : itm_in->tm_usec = -itm_in->tm_usec;
3549 608 : type = DTK_DAY;
3550 608 : parsing_unit_val = false;
3551 608 : break;
3552 :
3553 1532 : case DTK_TZ:
3554 :
3555 : /*
3556 : * Timezone means a token with a leading sign character and at
3557 : * least one digit; there could be ':', '.', '-' embedded in
3558 : * it as well.
3559 : */
3560 : Assert(*field[i] == '-' || *field[i] == '+');
3561 :
3562 : /*
3563 : * Check for signed hh:mm or hh:mm:ss. If so, process exactly
3564 : * like DTK_TIME case above, plus handling the sign.
3565 : */
3566 1916 : if (strchr(field[i] + 1, ':') != NULL &&
3567 384 : DecodeTimeForInterval(field[i] + 1, fmask, range,
3568 : &tmask, itm_in) == 0)
3569 : {
3570 384 : if (*field[i] == '-')
3571 : {
3572 : /* flip the sign on time field */
3573 354 : if (itm_in->tm_usec == PG_INT64_MIN)
3574 0 : return DTERR_FIELD_OVERFLOW;
3575 354 : itm_in->tm_usec = -itm_in->tm_usec;
3576 : }
3577 :
3578 384 : if (force_negative &&
3579 0 : itm_in->tm_usec > 0)
3580 0 : itm_in->tm_usec = -itm_in->tm_usec;
3581 :
3582 : /*
3583 : * Set the next type to be a day, if units are not
3584 : * specified. This handles the case of '1 +02:03' since we
3585 : * are reading right to left.
3586 : */
3587 384 : type = DTK_DAY;
3588 384 : parsing_unit_val = false;
3589 384 : break;
3590 : }
3591 :
3592 : /*
3593 : * Otherwise, fall through to DTK_NUMBER case, which can
3594 : * handle signed float numbers and signed year-month values.
3595 : */
3596 :
3597 : pg_fallthrough;
3598 :
3599 : case DTK_DATE:
3600 : case DTK_NUMBER:
3601 32784 : if (type == IGNORE_DTF)
3602 : {
3603 : /* use typmod to decide what rightmost field is */
3604 300 : switch (range)
3605 : {
3606 3 : case INTERVAL_MASK(YEAR):
3607 3 : type = DTK_YEAR;
3608 3 : break;
3609 15 : case INTERVAL_MASK(MONTH):
3610 : case INTERVAL_MASK(YEAR) | INTERVAL_MASK(MONTH):
3611 15 : type = DTK_MONTH;
3612 15 : break;
3613 9 : case INTERVAL_MASK(DAY):
3614 9 : type = DTK_DAY;
3615 9 : break;
3616 12 : case INTERVAL_MASK(HOUR):
3617 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR):
3618 12 : type = DTK_HOUR;
3619 12 : break;
3620 12 : case INTERVAL_MASK(MINUTE):
3621 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
3622 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
3623 12 : type = DTK_MINUTE;
3624 12 : break;
3625 30 : case INTERVAL_MASK(SECOND):
3626 : case INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
3627 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
3628 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
3629 30 : type = DTK_SECOND;
3630 30 : break;
3631 219 : default:
3632 219 : type = DTK_SECOND;
3633 219 : break;
3634 : }
3635 : }
3636 :
3637 32784 : errno = 0;
3638 32784 : val = strtoi64(field[i], &cp, 10);
3639 32784 : if (errno == ERANGE)
3640 6 : return DTERR_FIELD_OVERFLOW;
3641 :
3642 32778 : if (*cp == '-')
3643 : {
3644 : /* SQL "years-months" syntax */
3645 : int val2;
3646 :
3647 30 : val2 = strtoint(cp + 1, &cp, 10);
3648 30 : if (errno == ERANGE || val2 < 0 || val2 >= MONTHS_PER_YEAR)
3649 0 : return DTERR_FIELD_OVERFLOW;
3650 30 : if (*cp != '\0')
3651 0 : return DTERR_BAD_FORMAT;
3652 30 : type = DTK_MONTH;
3653 30 : if (*field[i] == '-')
3654 3 : val2 = -val2;
3655 30 : if (pg_mul_s64_overflow(val, MONTHS_PER_YEAR, &val))
3656 0 : return DTERR_FIELD_OVERFLOW;
3657 30 : if (pg_add_s64_overflow(val, val2, &val))
3658 0 : return DTERR_FIELD_OVERFLOW;
3659 30 : fval = 0;
3660 : }
3661 32748 : else if (*cp == '.')
3662 : {
3663 243 : dterr = ParseFraction(cp, &fval);
3664 243 : if (dterr)
3665 0 : return dterr;
3666 243 : if (*field[i] == '-')
3667 69 : fval = -fval;
3668 : }
3669 32505 : else if (*cp == '\0')
3670 32313 : fval = 0;
3671 : else
3672 192 : return DTERR_BAD_FORMAT;
3673 :
3674 32586 : tmask = 0; /* DTK_M(type); */
3675 :
3676 32586 : if (force_negative)
3677 : {
3678 : /* val and fval should be of same sign, but test anyway */
3679 40 : if (val > 0)
3680 30 : val = -val;
3681 40 : if (fval > 0)
3682 9 : fval = -fval;
3683 : }
3684 :
3685 32586 : switch (type)
3686 : {
3687 165 : case DTK_MICROSEC:
3688 165 : if (!AdjustMicroseconds(val, fval, 1, itm_in))
3689 18 : return DTERR_FIELD_OVERFLOW;
3690 147 : tmask = DTK_M(MICROSECOND);
3691 147 : break;
3692 :
3693 53 : case DTK_MILLISEC:
3694 53 : if (!AdjustMicroseconds(val, fval, 1000, itm_in))
3695 6 : return DTERR_FIELD_OVERFLOW;
3696 47 : tmask = DTK_M(MILLISECOND);
3697 47 : break;
3698 :
3699 460 : case DTK_SECOND:
3700 460 : if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
3701 6 : return DTERR_FIELD_OVERFLOW;
3702 :
3703 : /*
3704 : * If any subseconds were specified, consider this
3705 : * microsecond and millisecond input as well.
3706 : */
3707 454 : if (fval == 0)
3708 373 : tmask = DTK_M(SECOND);
3709 : else
3710 81 : tmask = DTK_ALL_SECS_M;
3711 454 : break;
3712 :
3713 185 : case DTK_MINUTE:
3714 185 : if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
3715 6 : return DTERR_FIELD_OVERFLOW;
3716 179 : tmask = DTK_M(MINUTE);
3717 179 : break;
3718 :
3719 346 : case DTK_HOUR:
3720 346 : if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
3721 6 : return DTERR_FIELD_OVERFLOW;
3722 340 : tmask = DTK_M(HOUR);
3723 340 : type = DTK_DAY; /* set for next field */
3724 340 : break;
3725 :
3726 3530 : case DTK_DAY:
3727 3530 : if (!AdjustDays(val, 1, itm_in) ||
3728 3494 : !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
3729 45 : return DTERR_FIELD_OVERFLOW;
3730 3485 : tmask = DTK_M(DAY);
3731 3485 : break;
3732 :
3733 48 : case DTK_WEEK:
3734 48 : if (!AdjustDays(val, 7, itm_in) ||
3735 36 : !AdjustFractDays(fval, 7, itm_in))
3736 24 : return DTERR_FIELD_OVERFLOW;
3737 24 : tmask = DTK_M(WEEK);
3738 24 : break;
3739 :
3740 450 : case DTK_MONTH:
3741 450 : if (!AdjustMonths(val, itm_in) ||
3742 420 : !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
3743 42 : return DTERR_FIELD_OVERFLOW;
3744 408 : tmask = DTK_M(MONTH);
3745 408 : break;
3746 :
3747 27250 : case DTK_YEAR:
3748 27250 : if (!AdjustYears(val, 1, itm_in) ||
3749 27226 : !AdjustFractYears(fval, 1, itm_in))
3750 30 : return DTERR_FIELD_OVERFLOW;
3751 27220 : tmask = DTK_M(YEAR);
3752 27220 : break;
3753 :
3754 33 : case DTK_DECADE:
3755 33 : if (!AdjustYears(val, 10, itm_in) ||
3756 21 : !AdjustFractYears(fval, 10, itm_in))
3757 18 : return DTERR_FIELD_OVERFLOW;
3758 15 : tmask = DTK_M(DECADE);
3759 15 : break;
3760 :
3761 33 : case DTK_CENTURY:
3762 33 : if (!AdjustYears(val, 100, itm_in) ||
3763 21 : !AdjustFractYears(fval, 100, itm_in))
3764 18 : return DTERR_FIELD_OVERFLOW;
3765 15 : tmask = DTK_M(CENTURY);
3766 15 : break;
3767 :
3768 33 : case DTK_MILLENNIUM:
3769 33 : if (!AdjustYears(val, 1000, itm_in) ||
3770 21 : !AdjustFractYears(fval, 1000, itm_in))
3771 18 : return DTERR_FIELD_OVERFLOW;
3772 15 : tmask = DTK_M(MILLENNIUM);
3773 15 : break;
3774 :
3775 0 : default:
3776 0 : return DTERR_BAD_FORMAT;
3777 : }
3778 32349 : parsing_unit_val = false;
3779 32349 : break;
3780 :
3781 32927 : case DTK_STRING:
3782 : case DTK_SPECIAL:
3783 : /* reject consecutive unhandled units */
3784 32927 : if (parsing_unit_val)
3785 6 : return DTERR_BAD_FORMAT;
3786 32921 : type = DecodeUnits(i, field[i], &uval);
3787 32921 : if (type == UNKNOWN_FIELD)
3788 531 : type = DecodeSpecial(i, field[i], &uval);
3789 32921 : if (type == IGNORE_DTF)
3790 0 : continue;
3791 :
3792 32921 : tmask = 0; /* DTK_M(type); */
3793 32921 : switch (type)
3794 : {
3795 32339 : case UNITS:
3796 32339 : type = uval;
3797 32339 : parsing_unit_val = true;
3798 32339 : break;
3799 :
3800 51 : case AGO:
3801 :
3802 : /*
3803 : * "ago" is only allowed to appear at the end of the
3804 : * interval.
3805 : */
3806 51 : if (i != nf - 1)
3807 6 : return DTERR_BAD_FORMAT;
3808 45 : is_before = true;
3809 45 : type = uval;
3810 45 : break;
3811 :
3812 513 : case RESERV:
3813 513 : tmask = (DTK_DATE_M | DTK_TIME_M);
3814 :
3815 : /*
3816 : * Only reserved words corresponding to infinite
3817 : * intervals are accepted.
3818 : */
3819 513 : if (uval != DTK_LATE && uval != DTK_EARLY)
3820 18 : return DTERR_BAD_FORMAT;
3821 :
3822 : /*
3823 : * Infinity cannot be followed by anything else. We
3824 : * could allow "ago" to reverse the sign of infinity
3825 : * but using signed infinity is more intuitive.
3826 : */
3827 495 : if (i != nf - 1)
3828 6 : return DTERR_BAD_FORMAT;
3829 :
3830 489 : *dtype = uval;
3831 489 : break;
3832 :
3833 18 : default:
3834 18 : return DTERR_BAD_FORMAT;
3835 : }
3836 32873 : break;
3837 :
3838 0 : default:
3839 0 : return DTERR_BAD_FORMAT;
3840 : }
3841 :
3842 66214 : if (tmask & fmask)
3843 48 : return DTERR_BAD_FORMAT;
3844 66166 : fmask |= tmask;
3845 : }
3846 :
3847 : /* ensure that at least one time field has been found */
3848 32127 : if (fmask == 0)
3849 3 : return DTERR_BAD_FORMAT;
3850 :
3851 : /* reject if unit appeared and was never handled */
3852 32124 : if (parsing_unit_val)
3853 3 : return DTERR_BAD_FORMAT;
3854 :
3855 : /* finally, AGO negates everything */
3856 32121 : if (is_before)
3857 : {
3858 21 : if (itm_in->tm_usec == PG_INT64_MIN ||
3859 15 : itm_in->tm_mday == INT_MIN ||
3860 12 : itm_in->tm_mon == INT_MIN ||
3861 9 : itm_in->tm_year == INT_MIN)
3862 12 : return DTERR_FIELD_OVERFLOW;
3863 :
3864 9 : itm_in->tm_usec = -itm_in->tm_usec;
3865 9 : itm_in->tm_mday = -itm_in->tm_mday;
3866 9 : itm_in->tm_mon = -itm_in->tm_mon;
3867 9 : itm_in->tm_year = -itm_in->tm_year;
3868 : }
3869 :
3870 32109 : return 0;
3871 : }
3872 :
3873 :
3874 : /*
3875 : * Helper functions to avoid duplicated code in DecodeISO8601Interval.
3876 : *
3877 : * Parse a decimal value and break it into integer and fractional parts.
3878 : * Set *endptr to end+1 of the parsed substring.
3879 : * Returns 0 or DTERR code.
3880 : */
3881 : static int
3882 477 : ParseISO8601Number(char *str, char **endptr, int64 *ipart, double *fpart)
3883 : {
3884 : double val;
3885 :
3886 : /*
3887 : * Historically this has accepted anything that strtod() would take,
3888 : * notably including "e" notation, so continue doing that. This is
3889 : * slightly annoying because the precision of double is less than that of
3890 : * int64, so we would lose accuracy for inputs larger than 2^53 or so.
3891 : * However, historically we rejected inputs outside the int32 range,
3892 : * making that concern moot. What we do now is reject abs(val) above
3893 : * 1.0e15 (a round number a bit less than 2^50), so that any accepted
3894 : * value will have an exact integer part, and thereby a fraction part with
3895 : * abs(*fpart) less than 1. In the absence of field complaints it doesn't
3896 : * seem worth working harder.
3897 : */
3898 477 : if (!(isdigit((unsigned char) *str) || *str == '-' || *str == '.'))
3899 0 : return DTERR_BAD_FORMAT;
3900 477 : errno = 0;
3901 477 : val = strtod(str, endptr);
3902 : /* did we not see anything that looks like a double? */
3903 477 : if (*endptr == str || errno != 0)
3904 3 : return DTERR_BAD_FORMAT;
3905 : /* watch out for overflow, including infinities; reject NaN too */
3906 474 : if (isnan(val) || val < -1.0e15 || val > 1.0e15)
3907 0 : return DTERR_FIELD_OVERFLOW;
3908 : /* be very sure we truncate towards zero (cf dtrunc()) */
3909 474 : if (val >= 0)
3910 366 : *ipart = (int64) floor(val);
3911 : else
3912 108 : *ipart = (int64) -floor(-val);
3913 474 : *fpart = val - *ipart;
3914 : /* Callers expect this to hold */
3915 : Assert(*fpart > -1.0 && *fpart < 1.0);
3916 474 : return 0;
3917 : }
3918 :
3919 : /*
3920 : * Determine number of integral digits in a valid ISO 8601 number field
3921 : * (we should ignore sign and any fraction part)
3922 : */
3923 : static int
3924 33 : ISO8601IntegerWidth(char *fieldstart)
3925 : {
3926 : /* We might have had a leading '-' */
3927 33 : if (*fieldstart == '-')
3928 9 : fieldstart++;
3929 33 : return strspn(fieldstart, "0123456789");
3930 : }
3931 :
3932 :
3933 : /* DecodeISO8601Interval()
3934 : * Decode an ISO 8601 time interval of the "format with designators"
3935 : * (section 4.4.3.2) or "alternative format" (section 4.4.3.3)
3936 : * Examples: P1D for 1 day
3937 : * PT1H for 1 hour
3938 : * P2Y6M7DT1H30M for 2 years, 6 months, 7 days 1 hour 30 min
3939 : * P0002-06-07T01:30:00 the same value in alternative format
3940 : *
3941 : * Returns 0 if successful, DTERR code if bogus input detected.
3942 : * Note: error code should be DTERR_BAD_FORMAT if input doesn't look like
3943 : * ISO8601, otherwise this could cause unexpected error messages.
3944 : * dtype and itm_in are output parameters.
3945 : *
3946 : * A couple exceptions from the spec:
3947 : * - a week field ('W') may coexist with other units
3948 : * - allows decimals in fields other than the least significant unit.
3949 : */
3950 : int
3951 306 : DecodeISO8601Interval(char *str,
3952 : int *dtype, struct pg_itm_in *itm_in)
3953 : {
3954 306 : bool datepart = true;
3955 306 : bool havefield = false;
3956 :
3957 306 : *dtype = DTK_DELTA;
3958 306 : ClearPgItmIn(itm_in);
3959 :
3960 306 : if (strlen(str) < 2 || str[0] != 'P')
3961 114 : return DTERR_BAD_FORMAT;
3962 :
3963 192 : str++;
3964 561 : while (*str)
3965 : {
3966 : char *fieldstart;
3967 : int64 val;
3968 : double fval;
3969 : char unit;
3970 : int dterr;
3971 :
3972 507 : if (*str == 'T') /* T indicates the beginning of the time part */
3973 : {
3974 99 : datepart = false;
3975 99 : havefield = false;
3976 99 : str++;
3977 120 : continue;
3978 : }
3979 :
3980 408 : fieldstart = str;
3981 408 : dterr = ParseISO8601Number(str, &str, &val, &fval);
3982 408 : if (dterr)
3983 138 : return dterr;
3984 :
3985 : /*
3986 : * Note: we could step off the end of the string here. Code below
3987 : * *must* exit the loop if unit == '\0'.
3988 : */
3989 405 : unit = *str++;
3990 :
3991 405 : if (datepart)
3992 : {
3993 234 : switch (unit) /* before T: Y M W D */
3994 : {
3995 42 : case 'Y':
3996 42 : if (!AdjustYears(val, 1, itm_in) ||
3997 42 : !AdjustFractYears(fval, 1, itm_in))
3998 6 : return DTERR_FIELD_OVERFLOW;
3999 36 : break;
4000 54 : case 'M':
4001 54 : if (!AdjustMonths(val, itm_in) ||
4002 48 : !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
4003 12 : return DTERR_FIELD_OVERFLOW;
4004 42 : break;
4005 27 : case 'W':
4006 27 : if (!AdjustDays(val, 7, itm_in) ||
4007 21 : !AdjustFractDays(fval, 7, itm_in))
4008 12 : return DTERR_FIELD_OVERFLOW;
4009 15 : break;
4010 66 : case 'D':
4011 66 : if (!AdjustDays(val, 1, itm_in) ||
4012 48 : !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
4013 18 : return DTERR_FIELD_OVERFLOW;
4014 48 : break;
4015 15 : case 'T': /* ISO 8601 4.4.3.3 Alternative Format / Basic */
4016 : case '\0':
4017 15 : if (ISO8601IntegerWidth(fieldstart) == 8 && !havefield)
4018 : {
4019 3 : if (!AdjustYears(val / 10000, 1, itm_in) ||
4020 3 : !AdjustMonths((val / 100) % 100, itm_in) ||
4021 3 : !AdjustDays(val % 100, 1, itm_in) ||
4022 3 : !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
4023 0 : return DTERR_FIELD_OVERFLOW;
4024 3 : if (unit == '\0')
4025 0 : return 0;
4026 3 : datepart = false;
4027 3 : havefield = false;
4028 3 : continue;
4029 : }
4030 : /* Else fall through to extended alternative format */
4031 : pg_fallthrough;
4032 : case '-': /* ISO 8601 4.4.3.3 Alternative Format,
4033 : * Extended */
4034 42 : if (havefield)
4035 0 : return DTERR_BAD_FORMAT;
4036 :
4037 42 : if (!AdjustYears(val, 1, itm_in) ||
4038 36 : !AdjustFractYears(fval, 1, itm_in))
4039 6 : return DTERR_FIELD_OVERFLOW;
4040 36 : if (unit == '\0')
4041 3 : return 0;
4042 33 : if (unit == 'T')
4043 : {
4044 3 : datepart = false;
4045 3 : havefield = false;
4046 3 : continue;
4047 : }
4048 :
4049 30 : dterr = ParseISO8601Number(str, &str, &val, &fval);
4050 30 : if (dterr)
4051 0 : return dterr;
4052 30 : if (!AdjustMonths(val, itm_in) ||
4053 27 : !AdjustFractDays(fval, DAYS_PER_MONTH, itm_in))
4054 3 : return DTERR_FIELD_OVERFLOW;
4055 27 : if (*str == '\0')
4056 3 : return 0;
4057 24 : if (*str == 'T')
4058 : {
4059 3 : datepart = false;
4060 3 : havefield = false;
4061 3 : continue;
4062 : }
4063 21 : if (*str != '-')
4064 0 : return DTERR_BAD_FORMAT;
4065 21 : str++;
4066 :
4067 21 : dterr = ParseISO8601Number(str, &str, &val, &fval);
4068 21 : if (dterr)
4069 0 : return dterr;
4070 21 : if (!AdjustDays(val, 1, itm_in) ||
4071 18 : !AdjustFractMicroseconds(fval, USECS_PER_DAY, itm_in))
4072 3 : return DTERR_FIELD_OVERFLOW;
4073 18 : if (*str == '\0')
4074 6 : return 0;
4075 12 : if (*str == 'T')
4076 : {
4077 12 : datepart = false;
4078 12 : havefield = false;
4079 12 : continue;
4080 : }
4081 0 : return DTERR_BAD_FORMAT;
4082 0 : default:
4083 : /* not a valid date unit suffix */
4084 0 : return DTERR_BAD_FORMAT;
4085 : }
4086 : }
4087 : else
4088 : {
4089 171 : switch (unit) /* after T: H M S */
4090 : {
4091 54 : case 'H':
4092 54 : if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
4093 18 : return DTERR_FIELD_OVERFLOW;
4094 36 : break;
4095 30 : case 'M':
4096 30 : if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
4097 0 : return DTERR_FIELD_OVERFLOW;
4098 30 : break;
4099 48 : case 'S':
4100 48 : if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
4101 6 : return DTERR_FIELD_OVERFLOW;
4102 42 : break;
4103 18 : case '\0': /* ISO 8601 4.4.3.3 Alternative Format */
4104 18 : if (ISO8601IntegerWidth(fieldstart) == 6 && !havefield)
4105 : {
4106 3 : if (!AdjustMicroseconds(val / 10000, 0, USECS_PER_HOUR, itm_in) ||
4107 3 : !AdjustMicroseconds((val / 100) % 100, 0, USECS_PER_MINUTE, itm_in) ||
4108 3 : !AdjustMicroseconds(val % 100, 0, USECS_PER_SEC, itm_in) ||
4109 3 : !AdjustFractMicroseconds(fval, 1, itm_in))
4110 0 : return DTERR_FIELD_OVERFLOW;
4111 3 : return 0;
4112 : }
4113 : /* Else fall through to extended alternative format */
4114 : pg_fallthrough;
4115 : case ':': /* ISO 8601 4.4.3.3 Alternative Format,
4116 : * Extended */
4117 36 : if (havefield)
4118 0 : return DTERR_BAD_FORMAT;
4119 :
4120 36 : if (!AdjustMicroseconds(val, fval, USECS_PER_HOUR, itm_in))
4121 15 : return DTERR_FIELD_OVERFLOW;
4122 21 : if (unit == '\0')
4123 9 : return 0;
4124 :
4125 12 : dterr = ParseISO8601Number(str, &str, &val, &fval);
4126 12 : if (dterr)
4127 0 : return dterr;
4128 12 : if (!AdjustMicroseconds(val, fval, USECS_PER_MINUTE, itm_in))
4129 3 : return DTERR_FIELD_OVERFLOW;
4130 9 : if (*str == '\0')
4131 3 : return 0;
4132 6 : if (*str != ':')
4133 0 : return DTERR_BAD_FORMAT;
4134 6 : str++;
4135 :
4136 6 : dterr = ParseISO8601Number(str, &str, &val, &fval);
4137 6 : if (dterr)
4138 0 : return dterr;
4139 6 : if (!AdjustMicroseconds(val, fval, USECS_PER_SEC, itm_in))
4140 0 : return DTERR_FIELD_OVERFLOW;
4141 6 : if (*str == '\0')
4142 6 : return 0;
4143 0 : return DTERR_BAD_FORMAT;
4144 :
4145 0 : default:
4146 : /* not a valid time unit suffix */
4147 0 : return DTERR_BAD_FORMAT;
4148 : }
4149 : }
4150 :
4151 249 : havefield = true;
4152 : }
4153 :
4154 54 : return 0;
4155 : }
4156 :
4157 :
4158 : /* DecodeUnits()
4159 : * Decode text string using lookup table.
4160 : *
4161 : * This routine recognizes keywords associated with time interval units.
4162 : *
4163 : * Given string must be lowercased already.
4164 : *
4165 : * Implement a cache lookup since it is likely that dates
4166 : * will be related in format.
4167 : */
4168 : int
4169 60023 : DecodeUnits(int field, const char *lowtoken, int *val)
4170 : {
4171 : int type;
4172 : const datetkn *tp;
4173 :
4174 60023 : tp = deltacache[field];
4175 : /* use strncmp so that we match truncated tokens */
4176 60023 : if (tp == NULL || strncmp(lowtoken, tp->token, TOKMAXLEN) != 0)
4177 : {
4178 27251 : tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
4179 : }
4180 60023 : if (tp == NULL)
4181 : {
4182 17544 : type = UNKNOWN_FIELD;
4183 17544 : *val = 0;
4184 : }
4185 : else
4186 : {
4187 42479 : deltacache[field] = tp;
4188 42479 : type = tp->type;
4189 42479 : *val = tp->value;
4190 : }
4191 :
4192 60023 : return type;
4193 : } /* DecodeUnits() */
4194 :
4195 : /*
4196 : * Report an error detected by one of the datetime input processing routines.
4197 : *
4198 : * dterr is the error code, and *extra contains any auxiliary info we need
4199 : * for the error report. extra can be NULL if not needed for the particular
4200 : * dterr value.
4201 : *
4202 : * str is the original input string, and datatype is the name of the datatype
4203 : * we were trying to accept. (For some DTERR codes, these are not used and
4204 : * can be NULL.)
4205 : *
4206 : * If escontext points to an ErrorSaveContext node, that is filled instead
4207 : * of throwing an error.
4208 : *
4209 : * Note: it might seem useless to distinguish DTERR_INTERVAL_OVERFLOW and
4210 : * DTERR_TZDISP_OVERFLOW from DTERR_FIELD_OVERFLOW, but SQL99 mandates three
4211 : * separate SQLSTATE codes, so ...
4212 : */
4213 : void
4214 876 : DateTimeParseError(int dterr, DateTimeErrorExtra *extra,
4215 : const char *str, const char *datatype,
4216 : Node *escontext)
4217 : {
4218 876 : switch (dterr)
4219 : {
4220 108 : case DTERR_FIELD_OVERFLOW:
4221 108 : errsave(escontext,
4222 : (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4223 : errmsg("date/time field value out of range: \"%s\"",
4224 : str)));
4225 12 : break;
4226 90 : case DTERR_MD_FIELD_OVERFLOW:
4227 : /* <nanny>same as above, but add hint about DateStyle</nanny> */
4228 90 : errsave(escontext,
4229 : (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
4230 : errmsg("date/time field value out of range: \"%s\"",
4231 : str),
4232 : errhint("Perhaps you need a different \"DateStyle\" setting.")));
4233 0 : break;
4234 360 : case DTERR_INTERVAL_OVERFLOW:
4235 360 : errsave(escontext,
4236 : (errcode(ERRCODE_INTERVAL_FIELD_OVERFLOW),
4237 : errmsg("interval field value out of range: \"%s\"",
4238 : str)));
4239 0 : break;
4240 6 : case DTERR_TZDISP_OVERFLOW:
4241 6 : errsave(escontext,
4242 : (errcode(ERRCODE_INVALID_TIME_ZONE_DISPLACEMENT_VALUE),
4243 : errmsg("time zone displacement out of range: \"%s\"",
4244 : str)));
4245 0 : break;
4246 18 : case DTERR_BAD_TIMEZONE:
4247 18 : errsave(escontext,
4248 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4249 : errmsg("time zone \"%s\" not recognized",
4250 : extra->dtee_timezone)));
4251 12 : break;
4252 0 : case DTERR_BAD_ZONE_ABBREV:
4253 0 : errsave(escontext,
4254 : (errcode(ERRCODE_CONFIG_FILE_ERROR),
4255 : errmsg("time zone \"%s\" not recognized",
4256 : extra->dtee_timezone),
4257 : errdetail("This time zone name appears in the configuration file for time zone abbreviation \"%s\".",
4258 : extra->dtee_abbrev)));
4259 0 : break;
4260 294 : case DTERR_BAD_FORMAT:
4261 : default:
4262 294 : errsave(escontext,
4263 : (errcode(ERRCODE_INVALID_DATETIME_FORMAT),
4264 : errmsg("invalid input syntax for type %s: \"%s\"",
4265 : datatype, str)));
4266 42 : break;
4267 : }
4268 66 : }
4269 :
4270 : /* datebsearch()
4271 : * Binary search -- from Knuth (6.2.1) Algorithm B. Special case like this
4272 : * is WAY faster than the generic bsearch().
4273 : */
4274 : static const datetkn *
4275 37173 : datebsearch(const char *key, const datetkn *base, int nel)
4276 : {
4277 37173 : if (nel > 0)
4278 : {
4279 37173 : const datetkn *last = base + nel - 1,
4280 : *position;
4281 : int result;
4282 :
4283 235785 : while (last >= base)
4284 : {
4285 213552 : position = base + ((last - base) >> 1);
4286 : /* precheck the first character for a bit of extra speed */
4287 213552 : result = (int) key[0] - (int) position->token[0];
4288 213552 : if (result == 0)
4289 : {
4290 : /* use strncmp so that we match truncated tokens */
4291 56488 : result = strncmp(key, position->token, TOKMAXLEN);
4292 56488 : if (result == 0)
4293 14940 : return position;
4294 : }
4295 198612 : if (result < 0)
4296 101311 : last = position - 1;
4297 : else
4298 97301 : base = position + 1;
4299 : }
4300 : }
4301 22233 : return NULL;
4302 : }
4303 :
4304 : /* EncodeTimezone()
4305 : * Copies representation of a numeric timezone offset to str.
4306 : *
4307 : * Returns a pointer to the new end of string. No NUL terminator is put
4308 : * there; callers are responsible for NUL terminating str themselves.
4309 : */
4310 : static char *
4311 31229 : EncodeTimezone(char *str, int tz, int style)
4312 : {
4313 : int hour,
4314 : min,
4315 : sec;
4316 :
4317 31229 : sec = abs(tz);
4318 31229 : min = sec / SECS_PER_MINUTE;
4319 31229 : sec -= min * SECS_PER_MINUTE;
4320 31229 : hour = min / MINS_PER_HOUR;
4321 31229 : min -= hour * MINS_PER_HOUR;
4322 :
4323 : /* TZ is negated compared to sign we wish to display ... */
4324 31229 : *str++ = (tz <= 0 ? '+' : '-');
4325 :
4326 31229 : if (sec != 0)
4327 : {
4328 0 : str = pg_ultostr_zeropad(str, hour, 2);
4329 0 : *str++ = ':';
4330 0 : str = pg_ultostr_zeropad(str, min, 2);
4331 0 : *str++ = ':';
4332 0 : str = pg_ultostr_zeropad(str, sec, 2);
4333 : }
4334 31229 : else if (min != 0 || style == USE_XSD_DATES)
4335 : {
4336 426 : str = pg_ultostr_zeropad(str, hour, 2);
4337 426 : *str++ = ':';
4338 426 : str = pg_ultostr_zeropad(str, min, 2);
4339 : }
4340 : else
4341 30803 : str = pg_ultostr_zeropad(str, hour, 2);
4342 31229 : return str;
4343 : }
4344 :
4345 : /* EncodeDateOnly()
4346 : * Encode date as local time.
4347 : */
4348 : void
4349 7899 : EncodeDateOnly(struct pg_tm *tm, int style, char *str)
4350 : {
4351 : Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4352 :
4353 7899 : switch (style)
4354 : {
4355 4103 : case USE_ISO_DATES:
4356 : case USE_XSD_DATES:
4357 : /* compatible with ISO date formats */
4358 4103 : str = pg_ultostr_zeropad(str,
4359 4103 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4360 4103 : *str++ = '-';
4361 4103 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4362 4103 : *str++ = '-';
4363 4103 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4364 4103 : break;
4365 :
4366 0 : case USE_SQL_DATES:
4367 : /* compatible with Oracle/Ingres date formats */
4368 0 : if (DateOrder == DATEORDER_DMY)
4369 : {
4370 0 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4371 0 : *str++ = '/';
4372 0 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4373 : }
4374 : else
4375 : {
4376 0 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4377 0 : *str++ = '/';
4378 0 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4379 : }
4380 0 : *str++ = '/';
4381 0 : str = pg_ultostr_zeropad(str,
4382 0 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4383 0 : break;
4384 :
4385 4 : case USE_GERMAN_DATES:
4386 : /* German-style date format */
4387 4 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4388 4 : *str++ = '.';
4389 4 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4390 4 : *str++ = '.';
4391 4 : str = pg_ultostr_zeropad(str,
4392 4 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4393 4 : break;
4394 :
4395 3792 : case USE_POSTGRES_DATES:
4396 : default:
4397 : /* traditional date-only style for Postgres */
4398 3792 : if (DateOrder == DATEORDER_DMY)
4399 : {
4400 0 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4401 0 : *str++ = '-';
4402 0 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4403 : }
4404 : else
4405 : {
4406 3792 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4407 3792 : *str++ = '-';
4408 3792 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4409 : }
4410 3792 : *str++ = '-';
4411 3792 : str = pg_ultostr_zeropad(str,
4412 3792 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4413 3792 : break;
4414 : }
4415 :
4416 7899 : if (tm->tm_year <= 0)
4417 : {
4418 40 : memcpy(str, " BC", 3); /* Don't copy NUL */
4419 40 : str += 3;
4420 : }
4421 7899 : *str = '\0';
4422 7899 : }
4423 :
4424 :
4425 : /* EncodeTimeOnly()
4426 : * Encode time fields only.
4427 : *
4428 : * tm and fsec are the value to encode, print_tz determines whether to include
4429 : * a time zone (the difference between time and timetz types), tz is the
4430 : * numeric time zone offset, style is the date style, str is where to write the
4431 : * output.
4432 : */
4433 : void
4434 6952 : EncodeTimeOnly(struct pg_tm *tm, fsec_t fsec, bool print_tz, int tz, int style, char *str)
4435 : {
4436 6952 : str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4437 6952 : *str++ = ':';
4438 6952 : str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4439 6952 : *str++ = ':';
4440 6952 : str = AppendSeconds(str, tm->tm_sec, fsec, MAX_TIME_PRECISION, true);
4441 6952 : if (print_tz)
4442 3627 : str = EncodeTimezone(str, tz, style);
4443 6952 : *str = '\0';
4444 6952 : }
4445 :
4446 :
4447 : /* EncodeDateTime()
4448 : * Encode date and time interpreted as local time.
4449 : *
4450 : * tm and fsec are the value to encode, print_tz determines whether to include
4451 : * a time zone (the difference between timestamp and timestamptz types), tz is
4452 : * the numeric time zone offset, tzn is the textual time zone, which if
4453 : * specified will be used instead of tz by some styles, style is the date
4454 : * style, str is where to write the output.
4455 : *
4456 : * Supported date styles:
4457 : * Postgres - day mon hh:mm:ss yyyy tz
4458 : * SQL - mm/dd/yyyy hh:mm:ss.ss tz
4459 : * ISO - yyyy-mm-dd hh:mm:ss+/-tz
4460 : * German - dd.mm.yyyy hh:mm:ss tz
4461 : * XSD - yyyy-mm-ddThh:mm:ss.ss+/-tz
4462 : */
4463 : void
4464 58690 : EncodeDateTime(struct pg_tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str)
4465 : {
4466 : int day;
4467 :
4468 : Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
4469 :
4470 : /*
4471 : * Negative tm_isdst means we have no valid time zone translation.
4472 : */
4473 58690 : if (tm->tm_isdst < 0)
4474 21652 : print_tz = false;
4475 :
4476 58690 : switch (style)
4477 : {
4478 43523 : case USE_ISO_DATES:
4479 : case USE_XSD_DATES:
4480 : /* Compatible with ISO-8601 date formats */
4481 43523 : str = pg_ultostr_zeropad(str,
4482 43523 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4483 43523 : *str++ = '-';
4484 43523 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4485 43523 : *str++ = '-';
4486 43523 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4487 43523 : *str++ = (style == USE_ISO_DATES) ? ' ' : 'T';
4488 43523 : str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4489 43523 : *str++ = ':';
4490 43523 : str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4491 43523 : *str++ = ':';
4492 43523 : str = AppendTimestampSeconds(str, tm, fsec);
4493 43523 : if (print_tz)
4494 27602 : str = EncodeTimezone(str, tz, style);
4495 43523 : break;
4496 :
4497 390 : case USE_SQL_DATES:
4498 : /* Compatible with Oracle/Ingres date formats */
4499 390 : if (DateOrder == DATEORDER_DMY)
4500 : {
4501 192 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4502 192 : *str++ = '/';
4503 192 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4504 : }
4505 : else
4506 : {
4507 198 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4508 198 : *str++ = '/';
4509 198 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4510 : }
4511 390 : *str++ = '/';
4512 390 : str = pg_ultostr_zeropad(str,
4513 390 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4514 390 : *str++ = ' ';
4515 390 : str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4516 390 : *str++ = ':';
4517 390 : str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4518 390 : *str++ = ':';
4519 390 : str = AppendTimestampSeconds(str, tm, fsec);
4520 :
4521 : /*
4522 : * Note: the uses of %.*s in this function would be risky if the
4523 : * timezone names ever contain non-ASCII characters, since we are
4524 : * not being careful to do encoding-aware clipping. However, all
4525 : * TZ abbreviations in the IANA database are plain ASCII.
4526 : */
4527 390 : if (print_tz)
4528 : {
4529 9 : if (tzn)
4530 : {
4531 9 : sprintf(str, " %.*s", MAXTZLEN, tzn);
4532 9 : str += strlen(str);
4533 : }
4534 : else
4535 0 : str = EncodeTimezone(str, tz, style);
4536 : }
4537 390 : break;
4538 :
4539 12 : case USE_GERMAN_DATES:
4540 : /* German variant on European style */
4541 12 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4542 12 : *str++ = '.';
4543 12 : str = pg_ultostr_zeropad(str, tm->tm_mon, 2);
4544 12 : *str++ = '.';
4545 12 : str = pg_ultostr_zeropad(str,
4546 12 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4547 12 : *str++ = ' ';
4548 12 : str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4549 12 : *str++ = ':';
4550 12 : str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4551 12 : *str++ = ':';
4552 12 : str = AppendTimestampSeconds(str, tm, fsec);
4553 :
4554 12 : if (print_tz)
4555 : {
4556 12 : if (tzn)
4557 : {
4558 12 : sprintf(str, " %.*s", MAXTZLEN, tzn);
4559 12 : str += strlen(str);
4560 : }
4561 : else
4562 0 : str = EncodeTimezone(str, tz, style);
4563 : }
4564 12 : break;
4565 :
4566 14765 : case USE_POSTGRES_DATES:
4567 : default:
4568 : /* Backward-compatible with traditional Postgres abstime dates */
4569 14765 : day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
4570 14765 : tm->tm_wday = j2day(day);
4571 14765 : memcpy(str, days[tm->tm_wday], 3);
4572 14765 : str += 3;
4573 14765 : *str++ = ' ';
4574 14765 : if (DateOrder == DATEORDER_DMY)
4575 : {
4576 199 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4577 199 : *str++ = ' ';
4578 199 : memcpy(str, months[tm->tm_mon - 1], 3);
4579 199 : str += 3;
4580 : }
4581 : else
4582 : {
4583 14566 : memcpy(str, months[tm->tm_mon - 1], 3);
4584 14566 : str += 3;
4585 14566 : *str++ = ' ';
4586 14566 : str = pg_ultostr_zeropad(str, tm->tm_mday, 2);
4587 : }
4588 14765 : *str++ = ' ';
4589 14765 : str = pg_ultostr_zeropad(str, tm->tm_hour, 2);
4590 14765 : *str++ = ':';
4591 14765 : str = pg_ultostr_zeropad(str, tm->tm_min, 2);
4592 14765 : *str++ = ':';
4593 14765 : str = AppendTimestampSeconds(str, tm, fsec);
4594 14765 : *str++ = ' ';
4595 14765 : str = pg_ultostr_zeropad(str,
4596 14765 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1), 4);
4597 :
4598 14765 : if (print_tz)
4599 : {
4600 9415 : if (tzn)
4601 : {
4602 9415 : sprintf(str, " %.*s", MAXTZLEN, tzn);
4603 9415 : str += strlen(str);
4604 : }
4605 : else
4606 : {
4607 : /*
4608 : * We have a time zone, but no string version. Use the
4609 : * numeric form, but be sure to include a leading space to
4610 : * avoid formatting something which would be rejected by
4611 : * the date/time parser later. - thomas 2001-10-19
4612 : */
4613 0 : *str++ = ' ';
4614 0 : str = EncodeTimezone(str, tz, style);
4615 : }
4616 : }
4617 14765 : break;
4618 : }
4619 :
4620 58690 : if (tm->tm_year <= 0)
4621 : {
4622 141 : memcpy(str, " BC", 3); /* Don't copy NUL */
4623 141 : str += 3;
4624 : }
4625 58690 : *str = '\0';
4626 58690 : }
4627 :
4628 :
4629 : /*
4630 : * Helper functions to avoid duplicated code in EncodeInterval.
4631 : */
4632 :
4633 : /* Append an ISO-8601-style interval field, but only if value isn't zero */
4634 : static char *
4635 105 : AddISO8601IntPart(char *cp, int64 value, char units)
4636 : {
4637 105 : if (value == 0)
4638 27 : return cp;
4639 78 : sprintf(cp, "%" PRId64 "%c", value, units);
4640 78 : return cp + strlen(cp);
4641 : }
4642 :
4643 : /* Append a postgres-style interval field, but only if value isn't zero */
4644 : static char *
4645 8418 : AddPostgresIntPart(char *cp, int64 value, const char *units,
4646 : bool *is_zero, bool *is_before)
4647 : {
4648 8418 : if (value == 0)
4649 4543 : return cp;
4650 11625 : sprintf(cp, "%s%s%" PRId64 " %s%s",
4651 3875 : (!*is_zero) ? " " : "",
4652 3875 : (*is_before && value > 0) ? "+" : "",
4653 : value,
4654 : units,
4655 : (value != 1) ? "s" : "");
4656 :
4657 : /*
4658 : * Each nonzero field sets is_before for (only) the next one. This is a
4659 : * tad bizarre but it's how it worked before...
4660 : */
4661 3875 : *is_before = (value < 0);
4662 3875 : *is_zero = false;
4663 3875 : return cp + strlen(cp);
4664 : }
4665 :
4666 : /* Append a verbose-style interval field, but only if value isn't zero */
4667 : static char *
4668 21260 : AddVerboseIntPart(char *cp, int64 value, const char *units,
4669 : bool *is_zero, bool *is_before)
4670 : {
4671 21260 : if (value == 0)
4672 14113 : return cp;
4673 : /* first nonzero value sets is_before */
4674 7147 : if (*is_zero)
4675 : {
4676 3940 : *is_before = (value < 0);
4677 3940 : value = i64abs(value);
4678 : }
4679 3207 : else if (*is_before)
4680 678 : value = -value;
4681 7147 : sprintf(cp, " %" PRId64 " %s%s", value, units, (value == 1) ? "" : "s");
4682 7147 : *is_zero = false;
4683 7147 : return cp + strlen(cp);
4684 : }
4685 :
4686 :
4687 : /* EncodeInterval()
4688 : * Interpret time structure as a delta time and convert to string.
4689 : *
4690 : * Support "traditional Postgres" and ISO-8601 styles.
4691 : * Actually, afaik ISO does not address time interval formatting,
4692 : * but this looks similar to the spec for absolute date/time.
4693 : * - thomas 1998-04-30
4694 : *
4695 : * Actually, afaik, ISO 8601 does specify formats for "time
4696 : * intervals...[of the]...format with time-unit designators", which
4697 : * are pretty ugly. The format looks something like
4698 : * P1Y1M1DT1H1M1.12345S
4699 : * but useful for exchanging data with computers instead of humans.
4700 : * - ron 2003-07-14
4701 : *
4702 : * And ISO's SQL 2008 standard specifies standards for
4703 : * "year-month literal"s (that look like '2-3') and
4704 : * "day-time literal"s (that look like ('4 5:6:7')
4705 : */
4706 : void
4707 7145 : EncodeInterval(struct pg_itm *itm, int style, char *str)
4708 : {
4709 7145 : char *cp = str;
4710 7145 : int year = itm->tm_year;
4711 7145 : int mon = itm->tm_mon;
4712 7145 : int64 mday = itm->tm_mday; /* tm_mday could be INT_MIN */
4713 7145 : int64 hour = itm->tm_hour;
4714 7145 : int min = itm->tm_min;
4715 7145 : int sec = itm->tm_sec;
4716 7145 : int fsec = itm->tm_usec;
4717 7145 : bool is_before = false;
4718 7145 : bool is_zero = true;
4719 :
4720 : /*
4721 : * The sign of year and month are guaranteed to match, since they are
4722 : * stored internally as "month". But we'll need to check for is_before and
4723 : * is_zero when determining the signs of day and hour/minute/seconds
4724 : * fields.
4725 : */
4726 7145 : switch (style)
4727 : {
4728 : /* SQL Standard interval format */
4729 63 : case INTSTYLE_SQL_STANDARD:
4730 : {
4731 48 : bool has_negative = year < 0 || mon < 0 ||
4732 33 : mday < 0 || hour < 0 ||
4733 111 : min < 0 || sec < 0 || fsec < 0;
4734 51 : bool has_positive = year > 0 || mon > 0 ||
4735 33 : mday > 0 || hour > 0 ||
4736 114 : min > 0 || sec > 0 || fsec > 0;
4737 63 : bool has_year_month = year != 0 || mon != 0;
4738 21 : bool has_day_time = mday != 0 || hour != 0 ||
4739 84 : min != 0 || sec != 0 || fsec != 0;
4740 63 : bool has_day = mday != 0;
4741 111 : bool sql_standard_value = !(has_negative && has_positive) &&
4742 48 : !(has_year_month && has_day_time);
4743 :
4744 : /*
4745 : * SQL Standard wants only 1 "<sign>" preceding the whole
4746 : * interval ... but can't do that if mixed signs.
4747 : */
4748 63 : if (has_negative && sql_standard_value)
4749 : {
4750 15 : *cp++ = '-';
4751 15 : year = -year;
4752 15 : mon = -mon;
4753 15 : mday = -mday;
4754 15 : hour = -hour;
4755 15 : min = -min;
4756 15 : sec = -sec;
4757 15 : fsec = -fsec;
4758 : }
4759 :
4760 63 : if (!has_negative && !has_positive)
4761 : {
4762 6 : sprintf(cp, "0");
4763 : }
4764 57 : else if (!sql_standard_value)
4765 : {
4766 : /*
4767 : * For non sql-standard interval values, force outputting
4768 : * the signs to avoid ambiguities with intervals with
4769 : * mixed sign components.
4770 : */
4771 27 : char year_sign = (year < 0 || mon < 0) ? '-' : '+';
4772 27 : char day_sign = (mday < 0) ? '-' : '+';
4773 39 : char sec_sign = (hour < 0 || min < 0 ||
4774 12 : sec < 0 || fsec < 0) ? '-' : '+';
4775 :
4776 27 : sprintf(cp, "%c%d-%d %c%" PRId64 " %c%" PRId64 ":%02d:",
4777 : year_sign, abs(year), abs(mon),
4778 : day_sign, i64abs(mday),
4779 : sec_sign, i64abs(hour), abs(min));
4780 27 : cp += strlen(cp);
4781 27 : cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4782 27 : *cp = '\0';
4783 : }
4784 30 : else if (has_year_month)
4785 : {
4786 9 : sprintf(cp, "%d-%d", year, mon);
4787 : }
4788 21 : else if (has_day)
4789 : {
4790 15 : sprintf(cp, "%" PRId64 " %" PRId64 ":%02d:",
4791 : mday, hour, min);
4792 15 : cp += strlen(cp);
4793 15 : cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4794 15 : *cp = '\0';
4795 : }
4796 : else
4797 : {
4798 6 : sprintf(cp, "%" PRId64 ":%02d:", hour, min);
4799 6 : cp += strlen(cp);
4800 6 : cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4801 6 : *cp = '\0';
4802 : }
4803 : }
4804 63 : break;
4805 :
4806 : /* ISO 8601 "time-intervals by duration only" */
4807 24 : case INTSTYLE_ISO_8601:
4808 : /* special-case zero to avoid printing nothing */
4809 24 : if (year == 0 && mon == 0 && mday == 0 &&
4810 3 : hour == 0 && min == 0 && sec == 0 && fsec == 0)
4811 : {
4812 3 : sprintf(cp, "PT0S");
4813 3 : break;
4814 : }
4815 21 : *cp++ = 'P';
4816 21 : cp = AddISO8601IntPart(cp, year, 'Y');
4817 21 : cp = AddISO8601IntPart(cp, mon, 'M');
4818 21 : cp = AddISO8601IntPart(cp, mday, 'D');
4819 21 : if (hour != 0 || min != 0 || sec != 0 || fsec != 0)
4820 18 : *cp++ = 'T';
4821 21 : cp = AddISO8601IntPart(cp, hour, 'H');
4822 21 : cp = AddISO8601IntPart(cp, min, 'M');
4823 21 : if (sec != 0 || fsec != 0)
4824 : {
4825 18 : if (sec < 0 || fsec < 0)
4826 6 : *cp++ = '-';
4827 18 : cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4828 18 : *cp++ = 'S';
4829 18 : *cp++ = '\0';
4830 : }
4831 21 : break;
4832 :
4833 : /* Compatible with postgresql < 8.4 when DateStyle = 'iso' */
4834 2806 : case INTSTYLE_POSTGRES:
4835 2806 : cp = AddPostgresIntPart(cp, year, "year", &is_zero, &is_before);
4836 :
4837 : /*
4838 : * Ideally we should spell out "month" like we do for "year" and
4839 : * "day". However, for backward compatibility, we can't easily
4840 : * fix this. bjm 2011-05-24
4841 : */
4842 2806 : cp = AddPostgresIntPart(cp, mon, "mon", &is_zero, &is_before);
4843 2806 : cp = AddPostgresIntPart(cp, mday, "day", &is_zero, &is_before);
4844 2806 : if (is_zero || hour != 0 || min != 0 || sec != 0 || fsec != 0)
4845 : {
4846 2334 : bool minus = (hour < 0 || min < 0 || sec < 0 || fsec < 0);
4847 :
4848 6895 : sprintf(cp, "%s%s%02" PRId64 ":%02d:",
4849 2334 : is_zero ? "" : " ",
4850 2227 : (minus ? "-" : (is_before ? "+" : "")),
4851 : i64abs(hour), abs(min));
4852 2334 : cp += strlen(cp);
4853 2334 : cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, true);
4854 2334 : *cp = '\0';
4855 : }
4856 2806 : break;
4857 :
4858 : /* Compatible with postgresql < 8.4 when DateStyle != 'iso' */
4859 4252 : case INTSTYLE_POSTGRES_VERBOSE:
4860 : default:
4861 4252 : strcpy(cp, "@");
4862 4252 : cp++;
4863 4252 : cp = AddVerboseIntPart(cp, year, "year", &is_zero, &is_before);
4864 4252 : cp = AddVerboseIntPart(cp, mon, "mon", &is_zero, &is_before);
4865 4252 : cp = AddVerboseIntPart(cp, mday, "day", &is_zero, &is_before);
4866 4252 : cp = AddVerboseIntPart(cp, hour, "hour", &is_zero, &is_before);
4867 4252 : cp = AddVerboseIntPart(cp, min, "min", &is_zero, &is_before);
4868 4252 : if (sec != 0 || fsec != 0)
4869 : {
4870 1641 : *cp++ = ' ';
4871 1641 : if (sec < 0 || (sec == 0 && fsec < 0))
4872 : {
4873 510 : if (is_zero)
4874 171 : is_before = true;
4875 339 : else if (!is_before)
4876 3 : *cp++ = '-';
4877 : }
4878 1131 : else if (is_before)
4879 6 : *cp++ = '-';
4880 1641 : cp = AppendSeconds(cp, sec, fsec, MAX_INTERVAL_PRECISION, false);
4881 : /* We output "ago", not negatives, so use abs(). */
4882 1641 : sprintf(cp, " sec%s",
4883 1641 : (abs(sec) != 1 || fsec != 0) ? "s" : "");
4884 1641 : is_zero = false;
4885 : }
4886 : /* identically zero? then put in a unitless zero... */
4887 4252 : if (is_zero)
4888 115 : strcat(cp, " 0");
4889 4252 : if (is_before)
4890 707 : strcat(cp, " ago");
4891 4252 : break;
4892 : }
4893 7145 : }
4894 :
4895 :
4896 : /*
4897 : * We've been burnt by stupid errors in the ordering of the datetkn tables
4898 : * once too often. Arrange to check them during postmaster start.
4899 : */
4900 : static bool
4901 1876 : CheckDateTokenTable(const char *tablename, const datetkn *base, int nel)
4902 : {
4903 1876 : bool ok = true;
4904 : int i;
4905 :
4906 126630 : for (i = 0; i < nel; i++)
4907 : {
4908 : /* check for token strings that don't fit */
4909 124754 : if (strlen(base[i].token) > TOKMAXLEN)
4910 : {
4911 : /* %.*s is safe since all our tokens are ASCII */
4912 0 : elog(LOG, "token too long in %s table: \"%.*s\"",
4913 : tablename,
4914 : TOKMAXLEN + 1, base[i].token);
4915 0 : ok = false;
4916 0 : break; /* don't risk applying strcmp */
4917 : }
4918 : /* check for out of order */
4919 124754 : if (i > 0 &&
4920 122878 : strcmp(base[i - 1].token, base[i].token) >= 0)
4921 : {
4922 0 : elog(LOG, "ordering error in %s table: \"%s\" >= \"%s\"",
4923 : tablename,
4924 : base[i - 1].token,
4925 : base[i].token);
4926 0 : ok = false;
4927 : }
4928 : }
4929 1876 : return ok;
4930 : }
4931 :
4932 : bool
4933 938 : CheckDateTokenTables(void)
4934 : {
4935 938 : bool ok = true;
4936 :
4937 : Assert(UNIX_EPOCH_JDATE == date2j(1970, 1, 1));
4938 : Assert(POSTGRES_EPOCH_JDATE == date2j(2000, 1, 1));
4939 :
4940 938 : ok &= CheckDateTokenTable("datetktbl", datetktbl, szdatetktbl);
4941 938 : ok &= CheckDateTokenTable("deltatktbl", deltatktbl, szdeltatktbl);
4942 938 : return ok;
4943 : }
4944 :
4945 : /*
4946 : * Common code for temporal prosupport functions: simplify, if possible,
4947 : * a call to a temporal type's length-coercion function.
4948 : *
4949 : * Types time, timetz, timestamp and timestamptz each have a range of allowed
4950 : * precisions. An unspecified precision is rigorously equivalent to the
4951 : * highest specifiable precision. We can replace the function call with a
4952 : * no-op RelabelType if it is coercing to the same or higher precision as the
4953 : * input is known to have.
4954 : *
4955 : * The input Node is always a FuncExpr, but to reduce the #include footprint
4956 : * of datetime.h, we declare it as Node *.
4957 : *
4958 : * Note: timestamp_scale throws an error when the typmod is out of range, but
4959 : * we can't get there from a cast: our typmodin will have caught it already.
4960 : */
4961 : Node *
4962 12 : TemporalSimplify(int32 max_precis, Node *node)
4963 : {
4964 12 : FuncExpr *expr = castNode(FuncExpr, node);
4965 12 : Node *ret = NULL;
4966 : Node *typmod;
4967 :
4968 : Assert(list_length(expr->args) >= 2);
4969 :
4970 12 : typmod = (Node *) lsecond(expr->args);
4971 :
4972 12 : if (IsA(typmod, Const) && !((Const *) typmod)->constisnull)
4973 : {
4974 12 : Node *source = (Node *) linitial(expr->args);
4975 12 : int32 old_precis = exprTypmod(source);
4976 12 : int32 new_precis = DatumGetInt32(((Const *) typmod)->constvalue);
4977 :
4978 12 : if (new_precis < 0 || new_precis == max_precis ||
4979 0 : (old_precis >= 0 && new_precis >= old_precis))
4980 0 : ret = relabel_to_typmod(source, new_precis);
4981 : }
4982 :
4983 12 : return ret;
4984 : }
4985 :
4986 : /*
4987 : * This function gets called during timezone config file load or reload
4988 : * to create the final array of timezone tokens. The argument array
4989 : * is already sorted in name order.
4990 : *
4991 : * The result is a TimeZoneAbbrevTable (which must be a single guc_malloc'd
4992 : * chunk) or NULL on alloc failure. No other error conditions are defined.
4993 : */
4994 : TimeZoneAbbrevTable *
4995 7158 : ConvertTimeZoneAbbrevs(struct tzEntry *abbrevs, int n)
4996 : {
4997 : TimeZoneAbbrevTable *tbl;
4998 : Size tbl_size;
4999 : int i;
5000 :
5001 : /* Space for fixed fields and datetkn array */
5002 7158 : tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
5003 7158 : n * sizeof(datetkn);
5004 7158 : tbl_size = MAXALIGN(tbl_size);
5005 : /* Count up space for dynamic abbreviations */
5006 1402974 : for (i = 0; i < n; i++)
5007 : {
5008 1395816 : struct tzEntry *abbr = abbrevs + i;
5009 :
5010 1395816 : if (abbr->zone != NULL)
5011 : {
5012 : Size dsize;
5013 :
5014 357897 : dsize = offsetof(DynamicZoneAbbrev, zone) +
5015 357897 : strlen(abbr->zone) + 1;
5016 357897 : tbl_size += MAXALIGN(dsize);
5017 : }
5018 : }
5019 :
5020 : /* Alloc the result ... */
5021 7158 : tbl = guc_malloc(LOG, tbl_size);
5022 7158 : if (!tbl)
5023 0 : return NULL;
5024 :
5025 : /* ... and fill it in */
5026 7158 : tbl->tblsize = tbl_size;
5027 7158 : tbl->numabbrevs = n;
5028 : /* in this loop, tbl_size reprises the space calculation above */
5029 7158 : tbl_size = offsetof(TimeZoneAbbrevTable, abbrevs) +
5030 7158 : n * sizeof(datetkn);
5031 7158 : tbl_size = MAXALIGN(tbl_size);
5032 1402974 : for (i = 0; i < n; i++)
5033 : {
5034 1395816 : struct tzEntry *abbr = abbrevs + i;
5035 1395816 : datetkn *dtoken = tbl->abbrevs + i;
5036 :
5037 : /* use strlcpy to truncate name if necessary */
5038 1395816 : strlcpy(dtoken->token, abbr->abbrev, TOKMAXLEN + 1);
5039 1395816 : if (abbr->zone != NULL)
5040 : {
5041 : /* Allocate a DynamicZoneAbbrev for this abbreviation */
5042 : DynamicZoneAbbrev *dtza;
5043 : Size dsize;
5044 :
5045 357897 : dtza = (DynamicZoneAbbrev *) ((char *) tbl + tbl_size);
5046 357897 : dtza->tz = NULL;
5047 357897 : strcpy(dtza->zone, abbr->zone);
5048 :
5049 357897 : dtoken->type = DYNTZ;
5050 : /* value is offset from table start to DynamicZoneAbbrev */
5051 357897 : dtoken->value = (int32) tbl_size;
5052 :
5053 357897 : dsize = offsetof(DynamicZoneAbbrev, zone) +
5054 357897 : strlen(abbr->zone) + 1;
5055 357897 : tbl_size += MAXALIGN(dsize);
5056 : }
5057 : else
5058 : {
5059 1037919 : dtoken->type = abbr->is_dst ? DTZ : TZ;
5060 1037919 : dtoken->value = abbr->offset;
5061 : }
5062 : }
5063 :
5064 : /* Assert the two loops above agreed on size calculations */
5065 : Assert(tbl->tblsize == tbl_size);
5066 :
5067 : /* Check the ordering, if testing */
5068 : Assert(CheckDateTokenTable("timezone abbreviations", tbl->abbrevs, n));
5069 :
5070 7158 : return tbl;
5071 : }
5072 :
5073 : /*
5074 : * Install a TimeZoneAbbrevTable as the active table.
5075 : *
5076 : * Caller is responsible that the passed table doesn't go away while in use.
5077 : */
5078 : void
5079 7052 : InstallTimeZoneAbbrevs(TimeZoneAbbrevTable *tbl)
5080 : {
5081 7052 : zoneabbrevtbl = tbl;
5082 : /* reset tzabbrevcache, which may contain results from old table */
5083 7052 : memset(tzabbrevcache, 0, sizeof(tzabbrevcache));
5084 7052 : }
5085 :
5086 : /*
5087 : * Helper subroutine to locate pg_tz timezone for a dynamic abbreviation.
5088 : *
5089 : * On failure, returns NULL and fills *extra for a DTERR_BAD_ZONE_ABBREV error.
5090 : */
5091 : static pg_tz *
5092 615 : FetchDynamicTimeZone(TimeZoneAbbrevTable *tbl, const datetkn *tp,
5093 : DateTimeErrorExtra *extra)
5094 : {
5095 : DynamicZoneAbbrev *dtza;
5096 :
5097 : /* Just some sanity checks to prevent indexing off into nowhere */
5098 : Assert(tp->type == DYNTZ);
5099 : Assert(tp->value > 0 && tp->value < tbl->tblsize);
5100 :
5101 615 : dtza = (DynamicZoneAbbrev *) ((char *) tbl + tp->value);
5102 :
5103 : /* Look up the underlying zone if we haven't already */
5104 615 : if (dtza->tz == NULL)
5105 : {
5106 459 : dtza->tz = pg_tzset(dtza->zone);
5107 459 : if (dtza->tz == NULL)
5108 : {
5109 : /* Ooops, bogus zone name in config file entry */
5110 0 : extra->dtee_timezone = dtza->zone;
5111 0 : extra->dtee_abbrev = tp->token;
5112 : }
5113 : }
5114 615 : return dtza->tz;
5115 : }
5116 :
5117 :
5118 : /*
5119 : * This set-returning function reads all the time zone abbreviations
5120 : * defined by the IANA data for the current timezone setting,
5121 : * and returns a set of (abbrev, utc_offset, is_dst).
5122 : */
5123 : Datum
5124 126 : pg_timezone_abbrevs_zone(PG_FUNCTION_ARGS)
5125 : {
5126 : FuncCallContext *funcctx;
5127 : int *pindex;
5128 : Datum result;
5129 : HeapTuple tuple;
5130 : Datum values[3];
5131 126 : bool nulls[3] = {0};
5132 126 : TimestampTz now = GetCurrentTransactionStartTimestamp();
5133 126 : pg_time_t t = timestamptz_to_time_t(now);
5134 : const char *abbrev;
5135 : long int gmtoff;
5136 : int isdst;
5137 : struct pg_itm_in itm_in;
5138 : Interval *resInterval;
5139 :
5140 : /* stuff done only on the first call of the function */
5141 126 : if (SRF_IS_FIRSTCALL())
5142 : {
5143 : TupleDesc tupdesc;
5144 : MemoryContext oldcontext;
5145 :
5146 : /* create a function context for cross-call persistence */
5147 21 : funcctx = SRF_FIRSTCALL_INIT();
5148 :
5149 : /*
5150 : * switch to memory context appropriate for multiple function calls
5151 : */
5152 21 : oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
5153 :
5154 : /* allocate memory for user context */
5155 21 : pindex = palloc_object(int);
5156 21 : *pindex = 0;
5157 21 : funcctx->user_fctx = pindex;
5158 :
5159 21 : if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
5160 0 : elog(ERROR, "return type must be a row type");
5161 21 : funcctx->tuple_desc = tupdesc;
5162 :
5163 21 : MemoryContextSwitchTo(oldcontext);
5164 : }
5165 :
5166 : /* stuff done on every call of the function */
5167 126 : funcctx = SRF_PERCALL_SETUP();
5168 126 : pindex = (int *) funcctx->user_fctx;
5169 :
5170 126 : while ((abbrev = pg_get_next_timezone_abbrev(pindex,
5171 126 : session_timezone)) != NULL)
5172 : {
5173 : /* Ignore abbreviations that aren't all-alphabetic */
5174 105 : if (strspn(abbrev, "ABCDEFGHIJKLMNOPQRSTUVWXYZ") != strlen(abbrev))
5175 0 : continue;
5176 :
5177 : /* Determine the current meaning of the abbrev */
5178 105 : if (!pg_interpret_timezone_abbrev(abbrev,
5179 : &t,
5180 : &gmtoff,
5181 : &isdst,
5182 : session_timezone))
5183 0 : continue; /* hm, not actually used in this zone? */
5184 :
5185 105 : values[0] = CStringGetTextDatum(abbrev);
5186 :
5187 : /* Convert offset (in seconds) to an interval; can't overflow */
5188 420 : MemSet(&itm_in, 0, sizeof(struct pg_itm_in));
5189 105 : itm_in.tm_usec = (int64) gmtoff * USECS_PER_SEC;
5190 105 : resInterval = palloc_object(Interval);
5191 105 : (void) itmin2interval(&itm_in, resInterval);
5192 105 : values[1] = IntervalPGetDatum(resInterval);
5193 :
5194 105 : values[2] = BoolGetDatum(isdst);
5195 :
5196 105 : tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
5197 105 : result = HeapTupleGetDatum(tuple);
5198 :
5199 105 : SRF_RETURN_NEXT(funcctx, result);
5200 : }
5201 :
5202 21 : SRF_RETURN_DONE(funcctx);
5203 : }
5204 :
5205 : /*
5206 : * This set-returning function reads all the time zone abbreviations
5207 : * defined by the timezone_abbreviations setting,
5208 : * and returns a set of (abbrev, utc_offset, is_dst).
5209 : */
5210 : Datum
5211 2358 : pg_timezone_abbrevs_abbrevs(PG_FUNCTION_ARGS)
5212 : {
5213 : FuncCallContext *funcctx;
5214 : int *pindex;
5215 : Datum result;
5216 : HeapTuple tuple;
5217 : Datum values[3];
5218 2358 : bool nulls[3] = {0};
5219 : const datetkn *tp;
5220 : char buffer[TOKMAXLEN + 1];
5221 : int gmtoffset;
5222 : bool is_dst;
5223 : unsigned char *p;
5224 : struct pg_itm_in itm_in;
5225 : Interval *resInterval;
5226 :
5227 : /* stuff done only on the first call of the function */
5228 2358 : if (SRF_IS_FIRSTCALL())
5229 : {
5230 : TupleDesc tupdesc;
5231 : MemoryContext oldcontext;
5232 :
5233 : /* create a function context for cross-call persistence */
5234 12 : funcctx = SRF_FIRSTCALL_INIT();
5235 :
5236 : /*
5237 : * switch to memory context appropriate for multiple function calls
5238 : */
5239 12 : oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
5240 :
5241 : /* allocate memory for user context */
5242 12 : pindex = palloc_object(int);
5243 12 : *pindex = 0;
5244 12 : funcctx->user_fctx = pindex;
5245 :
5246 12 : if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
5247 0 : elog(ERROR, "return type must be a row type");
5248 12 : funcctx->tuple_desc = tupdesc;
5249 :
5250 12 : MemoryContextSwitchTo(oldcontext);
5251 : }
5252 :
5253 : /* stuff done on every call of the function */
5254 2358 : funcctx = SRF_PERCALL_SETUP();
5255 2358 : pindex = (int *) funcctx->user_fctx;
5256 :
5257 2358 : if (zoneabbrevtbl == NULL ||
5258 2358 : *pindex >= zoneabbrevtbl->numabbrevs)
5259 12 : SRF_RETURN_DONE(funcctx);
5260 :
5261 2346 : tp = zoneabbrevtbl->abbrevs + *pindex;
5262 :
5263 2346 : switch (tp->type)
5264 : {
5265 1173 : case TZ:
5266 1173 : gmtoffset = tp->value;
5267 1173 : is_dst = false;
5268 1173 : break;
5269 576 : case DTZ:
5270 576 : gmtoffset = tp->value;
5271 576 : is_dst = true;
5272 576 : break;
5273 597 : case DYNTZ:
5274 : {
5275 : /* Determine the current meaning of the abbrev */
5276 : pg_tz *tzp;
5277 : DateTimeErrorExtra extra;
5278 : TimestampTz now;
5279 : int isdst;
5280 :
5281 597 : tzp = FetchDynamicTimeZone(zoneabbrevtbl, tp, &extra);
5282 597 : if (tzp == NULL)
5283 0 : DateTimeParseError(DTERR_BAD_ZONE_ABBREV, &extra,
5284 : NULL, NULL, NULL);
5285 597 : now = GetCurrentTransactionStartTimestamp();
5286 1194 : gmtoffset = -DetermineTimeZoneAbbrevOffsetTS(now,
5287 597 : tp->token,
5288 : tzp,
5289 : &isdst);
5290 597 : is_dst = (bool) isdst;
5291 597 : break;
5292 : }
5293 0 : default:
5294 0 : elog(ERROR, "unrecognized timezone type %d", (int) tp->type);
5295 : gmtoffset = 0; /* keep compiler quiet */
5296 : is_dst = false;
5297 : break;
5298 : }
5299 :
5300 : /*
5301 : * Convert name to text, using upcasing conversion that is the inverse of
5302 : * what ParseDateTime() uses.
5303 : */
5304 2346 : strlcpy(buffer, tp->token, sizeof(buffer));
5305 10872 : for (p = (unsigned char *) buffer; *p; p++)
5306 8526 : *p = pg_toupper(*p);
5307 :
5308 2346 : values[0] = CStringGetTextDatum(buffer);
5309 :
5310 : /* Convert offset (in seconds) to an interval; can't overflow */
5311 9384 : MemSet(&itm_in, 0, sizeof(struct pg_itm_in));
5312 2346 : itm_in.tm_usec = (int64) gmtoffset * USECS_PER_SEC;
5313 2346 : resInterval = palloc_object(Interval);
5314 2346 : (void) itmin2interval(&itm_in, resInterval);
5315 2346 : values[1] = IntervalPGetDatum(resInterval);
5316 :
5317 2346 : values[2] = BoolGetDatum(is_dst);
5318 :
5319 2346 : (*pindex)++;
5320 :
5321 2346 : tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
5322 2346 : result = HeapTupleGetDatum(tuple);
5323 :
5324 2346 : SRF_RETURN_NEXT(funcctx, result);
5325 : }
5326 :
5327 : /*
5328 : * This set-returning function reads all the available full time zones
5329 : * and returns a set of (name, abbrev, utc_offset, is_dst).
5330 : */
5331 : Datum
5332 8 : pg_timezone_names(PG_FUNCTION_ARGS)
5333 : {
5334 8 : ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
5335 : pg_tzenum *tzenum;
5336 : pg_tz *tz;
5337 : Datum values[4];
5338 8 : bool nulls[4] = {0};
5339 : int tzoff;
5340 : struct pg_tm tm;
5341 : fsec_t fsec;
5342 : const char *tzn;
5343 : Interval *resInterval;
5344 : struct pg_itm_in itm_in;
5345 :
5346 8 : InitMaterializedSRF(fcinfo, 0);
5347 :
5348 : /* initialize timezone scanning code */
5349 8 : tzenum = pg_tzenumerate_start();
5350 :
5351 : /* search for another zone to display */
5352 : for (;;)
5353 : {
5354 4792 : tz = pg_tzenumerate_next(tzenum);
5355 4792 : if (!tz)
5356 8 : break;
5357 :
5358 : /* Convert now() to local time in this zone */
5359 4784 : if (timestamp2tm(GetCurrentTransactionStartTimestamp(),
5360 : &tzoff, &tm, &fsec, &tzn, tz) != 0)
5361 0 : continue; /* ignore if conversion fails */
5362 :
5363 : /*
5364 : * IANA's rather silly "Factory" time zone used to emit ridiculously
5365 : * long "abbreviations" such as "Local time zone must be set--see zic
5366 : * manual page" or "Local time zone must be set--use tzsetup". While
5367 : * modern versions of tzdb emit the much saner "-00", it seems some
5368 : * benighted packagers are hacking the IANA data so that it continues
5369 : * to produce these strings. To prevent producing a weirdly wide
5370 : * abbrev column, reject ridiculously long abbreviations.
5371 : */
5372 4784 : if (tzn && strlen(tzn) > 31)
5373 0 : continue;
5374 :
5375 4784 : values[0] = CStringGetTextDatum(pg_get_timezone_name(tz));
5376 4784 : values[1] = CStringGetTextDatum(tzn ? tzn : "");
5377 :
5378 : /* Convert tzoff to an interval; can't overflow */
5379 19136 : MemSet(&itm_in, 0, sizeof(struct pg_itm_in));
5380 4784 : itm_in.tm_usec = (int64) -tzoff * USECS_PER_SEC;
5381 4784 : resInterval = palloc_object(Interval);
5382 4784 : (void) itmin2interval(&itm_in, resInterval);
5383 4784 : values[2] = IntervalPGetDatum(resInterval);
5384 :
5385 4784 : values[3] = BoolGetDatum(tm.tm_isdst > 0);
5386 :
5387 4784 : tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);
5388 : }
5389 :
5390 8 : pg_tzenumerate_end(tzenum);
5391 8 : return (Datum) 0;
5392 : }
|
