1/* src/interfaces/ecpg/pgtypeslib/dt_common.c */
2
3#include "postgres_fe.h"
4
5#include <time.h>
6#include <ctype.h>
7#include <math.h>
8
9#include "pgtypeslib_extern.h"
10#include "dt.h"
11#include "pgtypes_timestamp.h"
12
13const int day_tab[2][13] = {
14 {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0},
15{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0}};
16
17typedef long AbsoluteTime;
18
19static const datetkn datetktbl[] = {
20/* text, token, lexval */
21 {EARLY, RESERV, DTK_EARLY}, /* "-infinity" reserved for "early time" */
22 {"acsst", DTZ, 37800}, /* Cent. Australia */
23 {"acst", DTZ, -14400}, /* Atlantic/Porto Acre */
24 {"act", TZ, -18000}, /* Atlantic/Porto Acre */
25 {DA_D, ADBC, AD}, /* "ad" for years >= 0 */
26 {"adt", DTZ, -10800}, /* Atlantic Daylight Time */
27 {"aesst", DTZ, 39600}, /* E. Australia */
28 {"aest", TZ, 36000}, /* Australia Eastern Std Time */
29 {"aft", TZ, 16200}, /* Kabul */
30 {"ahst", TZ, -36000}, /* Alaska-Hawaii Std Time */
31 {"akdt", DTZ, -28800}, /* Alaska Daylight Time */
32 {"akst", DTZ, -32400}, /* Alaska Standard Time */
33 {"allballs", RESERV, DTK_ZULU}, /* 00:00:00 */
34 {"almst", TZ, 25200}, /* Almaty Savings Time */
35 {"almt", TZ, 21600}, /* Almaty Time */
36 {"am", AMPM, AM},
37 {"amst", DTZ, 18000}, /* Armenia Summer Time (Yerevan) */
38#if 0
39 {"amst", DTZ, -10800}, /* Porto Velho */
40#endif
41 {"amt", TZ, 14400}, /* Armenia Time (Yerevan) */
42 {"anast", DTZ, 46800}, /* Anadyr Summer Time (Russia) */
43 {"anat", TZ, 43200}, /* Anadyr Time (Russia) */
44 {"apr", MONTH, 4},
45 {"april", MONTH, 4},
46#if 0
47 aqtst
48 aqtt
49 arst
50#endif
51 {"art", TZ, -10800}, /* Argentina Time */
52#if 0
53 ashst
54 ast /* Atlantic Standard Time, Arabia Standard
55 * Time, Acre Standard Time */
56#endif
57 {"ast", TZ, -14400}, /* Atlantic Std Time (Canada) */
58 {"at", IGNORE_DTF, 0}, /* "at" (throwaway) */
59 {"aug", MONTH, 8},
60 {"august", MONTH, 8},
61 {"awsst", DTZ, 32400}, /* W. Australia */
62 {"awst", TZ, 28800}, /* W. Australia */
63 {"awt", DTZ, -10800},
64 {"azost", DTZ, 0}, /* Azores Summer Time */
65 {"azot", TZ, -3600}, /* Azores Time */
66 {"azst", DTZ, 18000}, /* Azerbaijan Summer Time */
67 {"azt", TZ, 14400}, /* Azerbaijan Time */
68 {DB_C, ADBC, BC}, /* "bc" for years < 0 */
69 {"bdst", TZ, 7200}, /* British Double Summer Time */
70 {"bdt", TZ, 21600}, /* Dacca */
71 {"bnt", TZ, 28800}, /* Brunei Darussalam Time */
72 {"bort", TZ, 28800}, /* Borneo Time (Indonesia) */
73#if 0
74 bortst
75 bost
76#endif
77 {"bot", TZ, -14400}, /* Bolivia Time */
78 {"bra", TZ, -10800}, /* Brazil Time */
79#if 0
80 brst
81 brt
82#endif
83 {"bst", DTZ, 3600}, /* British Summer Time */
84#if 0
85 {"bst", TZ, -10800}, /* Brazil Standard Time */
86 {"bst", DTZ, -39600}, /* Bering Summer Time */
87#endif
88 {"bt", TZ, 10800}, /* Baghdad Time */
89 {"btt", TZ, 21600}, /* Bhutan Time */
90 {"cadt", DTZ, 37800}, /* Central Australian DST */
91 {"cast", TZ, 34200}, /* Central Australian ST */
92 {"cat", TZ, -36000}, /* Central Alaska Time */
93 {"cct", TZ, 28800}, /* China Coast Time */
94#if 0
95 {"cct", TZ, 23400}, /* Indian Cocos (Island) Time */
96#endif
97 {"cdt", DTZ, -18000}, /* Central Daylight Time */
98 {"cest", DTZ, 7200}, /* Central European Dayl.Time */
99 {"cet", TZ, 3600}, /* Central European Time */
100 {"cetdst", DTZ, 7200}, /* Central European Dayl.Time */
101 {"chadt", DTZ, 49500}, /* Chatham Island Daylight Time (13:45) */
102 {"chast", TZ, 45900}, /* Chatham Island Time (12:45) */
103#if 0
104 ckhst
105#endif
106 {"ckt", TZ, 43200}, /* Cook Islands Time */
107 {"clst", DTZ, -10800}, /* Chile Summer Time */
108 {"clt", TZ, -14400}, /* Chile Time */
109#if 0
110 cost
111#endif
112 {"cot", TZ, -18000}, /* Columbia Time */
113 {"cst", TZ, -21600}, /* Central Standard Time */
114#if 0
115 cvst
116#endif
117 {"cvt", TZ, 25200}, /* Christmas Island Time (Indian Ocean) */
118 {"cxt", TZ, 25200}, /* Christmas Island Time (Indian Ocean) */
119 {"d", UNITS, DTK_DAY}, /* "day of month" for ISO input */
120 {"davt", TZ, 25200}, /* Davis Time (Antarctica) */
121 {"ddut", TZ, 36000}, /* Dumont-d'Urville Time (Antarctica) */
122 {"dec", MONTH, 12},
123 {"december", MONTH, 12},
124 {"dnt", TZ, 3600}, /* Dansk Normal Tid */
125 {"dow", UNITS, DTK_DOW}, /* day of week */
126 {"doy", UNITS, DTK_DOY}, /* day of year */
127 {"dst", DTZMOD, SECS_PER_HOUR},
128#if 0
129 {"dusst", DTZ, 21600}, /* Dushanbe Summer Time */
130#endif
131 {"easst", DTZ, -18000}, /* Easter Island Summer Time */
132 {"east", TZ, -21600}, /* Easter Island Time */
133 {"eat", TZ, 10800}, /* East Africa Time */
134#if 0
135 {"east", DTZ, 14400}, /* Indian Antananarivo Savings Time */
136 {"eat", TZ, 10800}, /* Indian Antananarivo Time */
137 {"ect", TZ, -14400}, /* Eastern Caribbean Time */
138 {"ect", TZ, -18000}, /* Ecuador Time */
139#endif
140 {"edt", DTZ, -14400}, /* Eastern Daylight Time */
141 {"eest", DTZ, 10800}, /* Eastern Europe Summer Time */
142 {"eet", TZ, 7200}, /* East. Europe, USSR Zone 1 */
143 {"eetdst", DTZ, 10800}, /* Eastern Europe Daylight Time */
144 {"egst", DTZ, 0}, /* East Greenland Summer Time */
145 {"egt", TZ, -3600}, /* East Greenland Time */
146#if 0
147 ehdt
148#endif
149 {EPOCH, RESERV, DTK_EPOCH}, /* "epoch" reserved for system epoch time */
150 {"est", TZ, -18000}, /* Eastern Standard Time */
151 {"feb", MONTH, 2},
152 {"february", MONTH, 2},
153 {"fjst", DTZ, -46800}, /* Fiji Summer Time (13 hour offset!) */
154 {"fjt", TZ, -43200}, /* Fiji Time */
155 {"fkst", DTZ, -10800}, /* Falkland Islands Summer Time */
156 {"fkt", TZ, -7200}, /* Falkland Islands Time */
157#if 0
158 fnst
159 fnt
160#endif
161 {"fri", DOW, 5},
162 {"friday", DOW, 5},
163 {"fst", TZ, 3600}, /* French Summer Time */
164 {"fwt", DTZ, 7200}, /* French Winter Time */
165 {"galt", TZ, -21600}, /* Galapagos Time */
166 {"gamt", TZ, -32400}, /* Gambier Time */
167 {"gest", DTZ, 18000}, /* Georgia Summer Time */
168 {"get", TZ, 14400}, /* Georgia Time */
169 {"gft", TZ, -10800}, /* French Guiana Time */
170#if 0
171 ghst
172#endif
173 {"gilt", TZ, 43200}, /* Gilbert Islands Time */
174 {"gmt", TZ, 0}, /* Greenwish Mean Time */
175 {"gst", TZ, 36000}, /* Guam Std Time, USSR Zone 9 */
176 {"gyt", TZ, -14400}, /* Guyana Time */
177 {"h", UNITS, DTK_HOUR}, /* "hour" */
178#if 0
179 hadt
180 hast
181#endif
182 {"hdt", DTZ, -32400}, /* Hawaii/Alaska Daylight Time */
183#if 0
184 hkst
185#endif
186 {"hkt", TZ, 28800}, /* Hong Kong Time */
187#if 0
188 {"hmt", TZ, 10800}, /* Hellas ? ? */
189 hovst
190 hovt
191#endif
192 {"hst", TZ, -36000}, /* Hawaii Std Time */
193#if 0
194 hwt
195#endif
196 {"ict", TZ, 25200}, /* Indochina Time */
197 {"idle", TZ, 43200}, /* Intl. Date Line, East */
198 {"idlw", TZ, -43200}, /* Intl. Date Line, West */
199#if 0
200 idt /* Israeli, Iran, Indian Daylight Time */
201#endif
202 {LATE, RESERV, DTK_LATE}, /* "infinity" reserved for "late time" */
203 {"iot", TZ, 18000}, /* Indian Chagos Time */
204 {"irkst", DTZ, 32400}, /* Irkutsk Summer Time */
205 {"irkt", TZ, 28800}, /* Irkutsk Time */
206 {"irt", TZ, 12600}, /* Iran Time */
207 {"isodow", UNITS, DTK_ISODOW}, /* ISO day of week, Sunday == 7 */
208#if 0
209 isst
210#endif
211 {"ist", TZ, 7200}, /* Israel */
212 {"it", TZ, 12600}, /* Iran Time */
213 {"j", UNITS, DTK_JULIAN},
214 {"jan", MONTH, 1},
215 {"january", MONTH, 1},
216 {"javt", TZ, 25200}, /* Java Time (07:00? see JT) */
217 {"jayt", TZ, 32400}, /* Jayapura Time (Indonesia) */
218 {"jd", UNITS, DTK_JULIAN},
219 {"jst", TZ, 32400}, /* Japan Std Time,USSR Zone 8 */
220 {"jt", TZ, 27000}, /* Java Time (07:30? see JAVT) */
221 {"jul", MONTH, 7},
222 {"julian", UNITS, DTK_JULIAN},
223 {"july", MONTH, 7},
224 {"jun", MONTH, 6},
225 {"june", MONTH, 6},
226 {"kdt", DTZ, 36000}, /* Korea Daylight Time */
227 {"kgst", DTZ, 21600}, /* Kyrgyzstan Summer Time */
228 {"kgt", TZ, 18000}, /* Kyrgyzstan Time */
229 {"kost", TZ, 43200}, /* Kosrae Time */
230 {"krast", DTZ, 25200}, /* Krasnoyarsk Summer Time */
231 {"krat", TZ, 28800}, /* Krasnoyarsk Standard Time */
232 {"kst", TZ, 32400}, /* Korea Standard Time */
233 {"lhdt", DTZ, 39600}, /* Lord Howe Daylight Time, Australia */
234 {"lhst", TZ, 37800}, /* Lord Howe Standard Time, Australia */
235 {"ligt", TZ, 36000}, /* From Melbourne, Australia */
236 {"lint", TZ, 50400}, /* Line Islands Time (Kiribati; +14 hours!) */
237 {"lkt", TZ, 21600}, /* Lanka Time */
238 {"m", UNITS, DTK_MONTH}, /* "month" for ISO input */
239 {"magst", DTZ, 43200}, /* Magadan Summer Time */
240 {"magt", TZ, 39600}, /* Magadan Time */
241 {"mar", MONTH, 3},
242 {"march", MONTH, 3},
243 {"mart", TZ, -34200}, /* Marquesas Time */
244 {"mawt", TZ, 21600}, /* Mawson, Antarctica */
245 {"may", MONTH, 5},
246 {"mdt", DTZ, -21600}, /* Mountain Daylight Time */
247 {"mest", DTZ, 7200}, /* Middle Europe Summer Time */
248 {"met", TZ, 3600}, /* Middle Europe Time */
249 {"metdst", DTZ, 7200}, /* Middle Europe Daylight Time */
250 {"mewt", TZ, 3600}, /* Middle Europe Winter Time */
251 {"mez", TZ, 3600}, /* Middle Europe Zone */
252 {"mht", TZ, 43200}, /* Kwajalein */
253 {"mm", UNITS, DTK_MINUTE}, /* "minute" for ISO input */
254 {"mmt", TZ, 23400}, /* Myannar Time */
255 {"mon", DOW, 1},
256 {"monday", DOW, 1},
257#if 0
258 most
259#endif
260 {"mpt", TZ, 36000}, /* North Mariana Islands Time */
261 {"msd", DTZ, 14400}, /* Moscow Summer Time */
262 {"msk", TZ, 10800}, /* Moscow Time */
263 {"mst", TZ, -25200}, /* Mountain Standard Time */
264 {"mt", TZ, 30600}, /* Moluccas Time */
265 {"mut", TZ, 14400}, /* Mauritius Island Time */
266 {"mvt", TZ, 18000}, /* Maldives Island Time */
267 {"myt", TZ, 28800}, /* Malaysia Time */
268#if 0
269 ncst
270#endif
271 {"nct", TZ, 39600}, /* New Caledonia Time */
272 {"ndt", DTZ, -9000}, /* Nfld. Daylight Time */
273 {"nft", TZ, -12600}, /* Newfoundland Standard Time */
274 {"nor", TZ, 3600}, /* Norway Standard Time */
275 {"nov", MONTH, 11},
276 {"november", MONTH, 11},
277 {"novst", DTZ, 25200}, /* Novosibirsk Summer Time */
278 {"novt", TZ, 21600}, /* Novosibirsk Standard Time */
279 {NOW, RESERV, DTK_NOW}, /* current transaction time */
280 {"npt", TZ, 20700}, /* Nepal Standard Time (GMT-5:45) */
281 {"nst", TZ, -12600}, /* Nfld. Standard Time */
282 {"nt", TZ, -39600}, /* Nome Time */
283 {"nut", TZ, -39600}, /* Niue Time */
284 {"nzdt", DTZ, 46800}, /* New Zealand Daylight Time */
285 {"nzst", TZ, 43200}, /* New Zealand Standard Time */
286 {"nzt", TZ, 43200}, /* New Zealand Time */
287 {"oct", MONTH, 10},
288 {"october", MONTH, 10},
289 {"omsst", DTZ, 25200}, /* Omsk Summer Time */
290 {"omst", TZ, 21600}, /* Omsk Time */
291 {"on", IGNORE_DTF, 0}, /* "on" (throwaway) */
292 {"pdt", DTZ, -25200}, /* Pacific Daylight Time */
293#if 0
294 pest
295#endif
296 {"pet", TZ, -18000}, /* Peru Time */
297 {"petst", DTZ, 46800}, /* Petropavlovsk-Kamchatski Summer Time */
298 {"pett", TZ, 43200}, /* Petropavlovsk-Kamchatski Time */
299 {"pgt", TZ, 36000}, /* Papua New Guinea Time */
300 {"phot", TZ, 46800}, /* Phoenix Islands (Kiribati) Time */
301#if 0
302 phst
303#endif
304 {"pht", TZ, 28800}, /* Philippine Time */
305 {"pkt", TZ, 18000}, /* Pakistan Time */
306 {"pm", AMPM, PM},
307 {"pmdt", DTZ, -7200}, /* Pierre & Miquelon Daylight Time */
308#if 0
309 pmst
310#endif
311 {"pont", TZ, 39600}, /* Ponape Time (Micronesia) */
312 {"pst", TZ, -28800}, /* Pacific Standard Time */
313 {"pwt", TZ, 32400}, /* Palau Time */
314 {"pyst", DTZ, -10800}, /* Paraguay Summer Time */
315 {"pyt", TZ, -14400}, /* Paraguay Time */
316 {"ret", DTZ, 14400}, /* Reunion Island Time */
317 {"s", UNITS, DTK_SECOND}, /* "seconds" for ISO input */
318 {"sadt", DTZ, 37800}, /* S. Australian Dayl. Time */
319#if 0
320 samst
321 samt
322#endif
323 {"sast", TZ, 34200}, /* South Australian Std Time */
324 {"sat", DOW, 6},
325 {"saturday", DOW, 6},
326#if 0
327 sbt
328#endif
329 {"sct", DTZ, 14400}, /* Mahe Island Time */
330 {"sep", MONTH, 9},
331 {"sept", MONTH, 9},
332 {"september", MONTH, 9},
333 {"set", TZ, -3600}, /* Seychelles Time ?? */
334#if 0
335 sgt
336#endif
337 {"sst", DTZ, 7200}, /* Swedish Summer Time */
338 {"sun", DOW, 0},
339 {"sunday", DOW, 0},
340 {"swt", TZ, 3600}, /* Swedish Winter Time */
341#if 0
342 syot
343#endif
344 {"t", ISOTIME, DTK_TIME}, /* Filler for ISO time fields */
345 {"tft", TZ, 18000}, /* Kerguelen Time */
346 {"that", TZ, -36000}, /* Tahiti Time */
347 {"thu", DOW, 4},
348 {"thur", DOW, 4},
349 {"thurs", DOW, 4},
350 {"thursday", DOW, 4},
351 {"tjt", TZ, 18000}, /* Tajikistan Time */
352 {"tkt", TZ, -36000}, /* Tokelau Time */
353 {"tmt", TZ, 18000}, /* Turkmenistan Time */
354 {TODAY, RESERV, DTK_TODAY}, /* midnight */
355 {TOMORROW, RESERV, DTK_TOMORROW}, /* tomorrow midnight */
356#if 0
357 tost
358#endif
359 {"tot", TZ, 46800}, /* Tonga Time */
360#if 0
361 tpt
362#endif
363 {"truk", TZ, 36000}, /* Truk Time */
364 {"tue", DOW, 2},
365 {"tues", DOW, 2},
366 {"tuesday", DOW, 2},
367 {"tvt", TZ, 43200}, /* Tuvalu Time */
368#if 0
369 uct
370#endif
371 {"ulast", DTZ, 32400}, /* Ulan Bator Summer Time */
372 {"ulat", TZ, 28800}, /* Ulan Bator Time */
373 {"ut", TZ, 0},
374 {"utc", TZ, 0},
375 {"uyst", DTZ, -7200}, /* Uruguay Summer Time */
376 {"uyt", TZ, -10800}, /* Uruguay Time */
377 {"uzst", DTZ, 21600}, /* Uzbekistan Summer Time */
378 {"uzt", TZ, 18000}, /* Uzbekistan Time */
379 {"vet", TZ, -14400}, /* Venezuela Time */
380 {"vlast", DTZ, 39600}, /* Vladivostok Summer Time */
381 {"vlat", TZ, 36000}, /* Vladivostok Time */
382#if 0
383 vust
384#endif
385 {"vut", TZ, 39600}, /* Vanuata Time */
386 {"wadt", DTZ, 28800}, /* West Australian DST */
387 {"wakt", TZ, 43200}, /* Wake Time */
388#if 0
389 warst
390#endif
391 {"wast", TZ, 25200}, /* West Australian Std Time */
392 {"wat", TZ, -3600}, /* West Africa Time */
393 {"wdt", DTZ, 32400}, /* West Australian DST */
394 {"wed", DOW, 3},
395 {"wednesday", DOW, 3},
396 {"weds", DOW, 3},
397 {"west", DTZ, 3600}, /* Western Europe Summer Time */
398 {"wet", TZ, 0}, /* Western Europe */
399 {"wetdst", DTZ, 3600}, /* Western Europe Daylight Savings Time */
400 {"wft", TZ, 43200}, /* Wallis and Futuna Time */
401 {"wgst", DTZ, -7200}, /* West Greenland Summer Time */
402 {"wgt", TZ, -10800}, /* West Greenland Time */
403 {"wst", TZ, 28800}, /* West Australian Standard Time */
404 {"y", UNITS, DTK_YEAR}, /* "year" for ISO input */
405 {"yakst", DTZ, 36000}, /* Yakutsk Summer Time */
406 {"yakt", TZ, 32400}, /* Yakutsk Time */
407 {"yapt", TZ, 36000}, /* Yap Time (Micronesia) */
408 {"ydt", DTZ, -28800}, /* Yukon Daylight Time */
409 {"yekst", DTZ, 21600}, /* Yekaterinburg Summer Time */
410 {"yekt", TZ, 18000}, /* Yekaterinburg Time */
411 {YESTERDAY, RESERV, DTK_YESTERDAY}, /* yesterday midnight */
412 {"yst", TZ, -32400}, /* Yukon Standard Time */
413 {"z", TZ, 0}, /* time zone tag per ISO-8601 */
414 {"zp4", TZ, -14400}, /* UTC +4 hours. */
415 {"zp5", TZ, -18000}, /* UTC +5 hours. */
416 {"zp6", TZ, -21600}, /* UTC +6 hours. */
417 {ZULU, TZ, 0}, /* UTC */
418};
419
420static const datetkn deltatktbl[] = {
421 /* text, token, lexval */
422 {"@", IGNORE_DTF, 0}, /* postgres relative prefix */
423 {DAGO, AGO, 0}, /* "ago" indicates negative time offset */
424 {"c", UNITS, DTK_CENTURY}, /* "century" relative */
425 {"cent", UNITS, DTK_CENTURY}, /* "century" relative */
426 {"centuries", UNITS, DTK_CENTURY}, /* "centuries" relative */
427 {DCENTURY, UNITS, DTK_CENTURY}, /* "century" relative */
428 {"d", UNITS, DTK_DAY}, /* "day" relative */
429 {DDAY, UNITS, DTK_DAY}, /* "day" relative */
430 {"days", UNITS, DTK_DAY}, /* "days" relative */
431 {"dec", UNITS, DTK_DECADE}, /* "decade" relative */
432 {DDECADE, UNITS, DTK_DECADE}, /* "decade" relative */
433 {"decades", UNITS, DTK_DECADE}, /* "decades" relative */
434 {"decs", UNITS, DTK_DECADE}, /* "decades" relative */
435 {"h", UNITS, DTK_HOUR}, /* "hour" relative */
436 {DHOUR, UNITS, DTK_HOUR}, /* "hour" relative */
437 {"hours", UNITS, DTK_HOUR}, /* "hours" relative */
438 {"hr", UNITS, DTK_HOUR}, /* "hour" relative */
439 {"hrs", UNITS, DTK_HOUR}, /* "hours" relative */
440 {"m", UNITS, DTK_MINUTE}, /* "minute" relative */
441 {"microsecon", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
442 {"mil", UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
443 {"millennia", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
444 {DMILLENNIUM, UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
445 {"millisecon", UNITS, DTK_MILLISEC}, /* relative */
446 {"mils", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
447 {"min", UNITS, DTK_MINUTE}, /* "minute" relative */
448 {"mins", UNITS, DTK_MINUTE}, /* "minutes" relative */
449 {DMINUTE, UNITS, DTK_MINUTE}, /* "minute" relative */
450 {"minutes", UNITS, DTK_MINUTE}, /* "minutes" relative */
451 {"mon", UNITS, DTK_MONTH}, /* "months" relative */
452 {"mons", UNITS, DTK_MONTH}, /* "months" relative */
453 {DMONTH, UNITS, DTK_MONTH}, /* "month" relative */
454 {"months", UNITS, DTK_MONTH},
455 {"ms", UNITS, DTK_MILLISEC},
456 {"msec", UNITS, DTK_MILLISEC},
457 {DMILLISEC, UNITS, DTK_MILLISEC},
458 {"mseconds", UNITS, DTK_MILLISEC},
459 {"msecs", UNITS, DTK_MILLISEC},
460 {"qtr", UNITS, DTK_QUARTER}, /* "quarter" relative */
461 {DQUARTER, UNITS, DTK_QUARTER}, /* "quarter" relative */
462 {"s", UNITS, DTK_SECOND},
463 {"sec", UNITS, DTK_SECOND},
464 {DSECOND, UNITS, DTK_SECOND},
465 {"seconds", UNITS, DTK_SECOND},
466 {"secs", UNITS, DTK_SECOND},
467 {DTIMEZONE, UNITS, DTK_TZ}, /* "timezone" time offset */
468 {"timezone_h", UNITS, DTK_TZ_HOUR}, /* timezone hour units */
469 {"timezone_m", UNITS, DTK_TZ_MINUTE}, /* timezone minutes units */
470 {"us", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
471 {"usec", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
472 {DMICROSEC, UNITS, DTK_MICROSEC}, /* "microsecond" relative */
473 {"useconds", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
474 {"usecs", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
475 {"w", UNITS, DTK_WEEK}, /* "week" relative */
476 {DWEEK, UNITS, DTK_WEEK}, /* "week" relative */
477 {"weeks", UNITS, DTK_WEEK}, /* "weeks" relative */
478 {"y", UNITS, DTK_YEAR}, /* "year" relative */
479 {DYEAR, UNITS, DTK_YEAR}, /* "year" relative */
480 {"years", UNITS, DTK_YEAR}, /* "years" relative */
481 {"yr", UNITS, DTK_YEAR}, /* "year" relative */
482 {"yrs", UNITS, DTK_YEAR}, /* "years" relative */
483};
484
485static const unsigned int szdatetktbl = lengthof(datetktbl);
486static const unsigned int szdeltatktbl = lengthof(deltatktbl);
487
488static const datetkn *datecache[MAXDATEFIELDS] = {NULL};
489
490static const datetkn *deltacache[MAXDATEFIELDS] = {NULL};
491
492char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL};
493
494char *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", NULL};
495
496char *pgtypes_date_weekdays_short[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL};
497
498char *pgtypes_date_months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", NULL};
499
500static const datetkn *
501datebsearch(const char *key, const datetkn *base, unsigned int nel)
502{
503 if (nel > 0)
504 {
505 const datetkn *last = base + nel - 1,
506 *position;
507 int result;
508
509 while (last >= base)
510 {
511 position = base + ((last - base) >> 1);
512 /* precheck the first character for a bit of extra speed */
513 result = (int) key[0] - (int) position->token[0];
514 if (result == 0)
515 {
516 /* use strncmp so that we match truncated tokens */
517 result = strncmp(key, position->token, TOKMAXLEN);
518 if (result == 0)
519 return position;
520 }
521 if (result < 0)
522 last = position - 1;
523 else
524 base = position + 1;
525 }
526 }
527 return NULL;
528}
529
530/* DecodeUnits()
531 * Decode text string using lookup table.
532 * This routine supports time interval decoding.
533 */
534int
535DecodeUnits(int field, char *lowtoken, int *val)
536{
537 int type;
538 const datetkn *tp;
539
540 /* use strncmp so that we match truncated tokens */
541 if (deltacache[field] != NULL &&
542 strncmp(lowtoken, deltacache[field]->token, TOKMAXLEN) == 0)
543 tp = deltacache[field];
544 else
545 tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
546 deltacache[field] = tp;
547 if (tp == NULL)
548 {
549 type = UNKNOWN_FIELD;
550 *val = 0;
551 }
552 else
553 {
554 type = tp->type;
555 *val = tp->value;
556 }
557
558 return type;
559} /* DecodeUnits() */
560
561/*
562 * Calendar time to Julian date conversions.
563 * Julian date is commonly used in astronomical applications,
564 * since it is numerically accurate and computationally simple.
565 * The algorithms here will accurately convert between Julian day
566 * and calendar date for all non-negative Julian days
567 * (i.e. from Nov 24, -4713 on).
568 *
569 * These routines will be used by other date/time packages
570 * - thomas 97/02/25
571 *
572 * Rewritten to eliminate overflow problems. This now allows the
573 * routines to work correctly for all Julian day counts from
574 * 0 to 2147483647 (Nov 24, -4713 to Jun 3, 5874898) assuming
575 * a 32-bit integer. Longer types should also work to the limits
576 * of their precision.
577 */
578
579int
580date2j(int y, int m, int d)
581{
582 int julian;
583 int century;
584
585 if (m > 2)
586 {
587 m += 1;
588 y += 4800;
589 }
590 else
591 {
592 m += 13;
593 y += 4799;
594 }
595
596 century = y / 100;
597 julian = y * 365 - 32167;
598 julian += y / 4 - century + century / 4;
599 julian += 7834 * m / 256 + d;
600
601 return julian;
602} /* date2j() */
603
604void
605j2date(int jd, int *year, int *month, int *day)
606{
607 unsigned int julian;
608 unsigned int quad;
609 unsigned int extra;
610 int y;
611
612 julian = jd;
613 julian += 32044;
614 quad = julian / 146097;
615 extra = (julian - quad * 146097) * 4 + 3;
616 julian += 60 + quad * 3 + extra / 146097;
617 quad = julian / 1461;
618 julian -= quad * 1461;
619 y = julian * 4 / 1461;
620 julian = ((y != 0) ? (julian + 305) % 365 : (julian + 306) % 366) + 123;
621 y += quad * 4;
622 *year = y - 4800;
623 quad = julian * 2141 / 65536;
624 *day = julian - 7834 * quad / 256;
625 *month = (quad + 10) % 12 + 1;
626
627 return;
628} /* j2date() */
629
630/* DecodeSpecial()
631 * Decode text string using lookup table.
632 * Implement a cache lookup since it is likely that dates
633 * will be related in format.
634 */
635static int
636DecodeSpecial(int field, char *lowtoken, int *val)
637{
638 int type;
639 const datetkn *tp;
640
641 /* use strncmp so that we match truncated tokens */
642 if (datecache[field] != NULL &&
643 strncmp(lowtoken, datecache[field]->token, TOKMAXLEN) == 0)
644 tp = datecache[field];
645 else
646 {
647 tp = NULL;
648 if (!tp)
649 tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
650 }
651 datecache[field] = tp;
652 if (tp == NULL)
653 {
654 type = UNKNOWN_FIELD;
655 *val = 0;
656 }
657 else
658 {
659 type = tp->type;
660 *val = tp->value;
661 }
662
663 return type;
664} /* DecodeSpecial() */
665
666/* EncodeDateOnly()
667 * Encode date as local time.
668 */
669void
670EncodeDateOnly(struct tm *tm, int style, char *str, bool EuroDates)
671{
672 Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
673
674 switch (style)
675 {
676 case USE_ISO_DATES:
677 /* compatible with ISO date formats */
678 if (tm->tm_year > 0)
679 sprintf(str, "%04d-%02d-%02d",
680 tm->tm_year, tm->tm_mon, tm->tm_mday);
681 else
682 sprintf(str, "%04d-%02d-%02d %s",
683 -(tm->tm_year - 1), tm->tm_mon, tm->tm_mday, "BC");
684 break;
685
686 case USE_SQL_DATES:
687 /* compatible with Oracle/Ingres date formats */
688 if (EuroDates)
689 sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
690 else
691 sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
692 if (tm->tm_year > 0)
693 sprintf(str + 5, "/%04d", tm->tm_year);
694 else
695 sprintf(str + 5, "/%04d %s", -(tm->tm_year - 1), "BC");
696 break;
697
698 case USE_GERMAN_DATES:
699 /* German-style date format */
700 sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
701 if (tm->tm_year > 0)
702 sprintf(str + 5, ".%04d", tm->tm_year);
703 else
704 sprintf(str + 5, ".%04d %s", -(tm->tm_year - 1), "BC");
705 break;
706
707 case USE_POSTGRES_DATES:
708 default:
709 /* traditional date-only style for Postgres */
710 if (EuroDates)
711 sprintf(str, "%02d-%02d", tm->tm_mday, tm->tm_mon);
712 else
713 sprintf(str, "%02d-%02d", tm->tm_mon, tm->tm_mday);
714 if (tm->tm_year > 0)
715 sprintf(str + 5, "-%04d", tm->tm_year);
716 else
717 sprintf(str + 5, "-%04d %s", -(tm->tm_year - 1), "BC");
718 break;
719 }
720}
721
722void
723TrimTrailingZeros(char *str)
724{
725 int len = strlen(str);
726
727 /* chop off trailing zeros... but leave at least 2 fractional digits */
728 while (*(str + len - 1) == '0' && *(str + len - 3) != '.')
729 {
730 len--;
731 *(str + len) = '\0';
732 }
733}
734
735/* EncodeDateTime()
736 * Encode date and time interpreted as local time.
737 *
738 * tm and fsec are the value to encode, print_tz determines whether to include
739 * a time zone (the difference between timestamp and timestamptz types), tz is
740 * the numeric time zone offset, tzn is the textual time zone, which if
741 * specified will be used instead of tz by some styles, style is the date
742 * style, str is where to write the output.
743 *
744 * Supported date styles:
745 * Postgres - day mon hh:mm:ss yyyy tz
746 * SQL - mm/dd/yyyy hh:mm:ss.ss tz
747 * ISO - yyyy-mm-dd hh:mm:ss+/-tz
748 * German - dd.mm.yyyy hh:mm:ss tz
749 * Variants (affects order of month and day for Postgres and SQL styles):
750 * US - mm/dd/yyyy
751 * European - dd/mm/yyyy
752 */
753void
754EncodeDateTime(struct tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str, bool EuroDates)
755{
756 int day,
757 hour,
758 min;
759
760 /*
761 * Negative tm_isdst means we have no valid time zone translation.
762 */
763 if (tm->tm_isdst < 0)
764 print_tz = false;
765
766 switch (style)
767 {
768 case USE_ISO_DATES:
769 /* Compatible with ISO-8601 date formats */
770
771 sprintf(str, "%04d-%02d-%02d %02d:%02d",
772 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
773 tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min);
774
775 /*
776 * Print fractional seconds if any. The field widths here should
777 * be at least equal to MAX_TIMESTAMP_PRECISION.
778 */
779 if (fsec != 0)
780 {
781 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
782 TrimTrailingZeros(str);
783 }
784 else
785 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
786
787 if (tm->tm_year <= 0)
788 sprintf(str + strlen(str), " BC");
789
790 if (print_tz)
791 {
792 hour = -(tz / SECS_PER_HOUR);
793 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
794 if (min != 0)
795 sprintf(str + strlen(str), "%+03d:%02d", hour, min);
796 else
797 sprintf(str + strlen(str), "%+03d", hour);
798 }
799 break;
800
801 case USE_SQL_DATES:
802 /* Compatible with Oracle/Ingres date formats */
803
804 if (EuroDates)
805 sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
806 else
807 sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
808
809 sprintf(str + 5, "/%04d %02d:%02d",
810 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
811 tm->tm_hour, tm->tm_min);
812
813 /*
814 * Print fractional seconds if any. The field widths here should
815 * be at least equal to MAX_TIMESTAMP_PRECISION.
816 */
817 if (fsec != 0)
818 {
819 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
820 TrimTrailingZeros(str);
821 }
822 else
823 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
824
825 if (tm->tm_year <= 0)
826 sprintf(str + strlen(str), " BC");
827
828 /*
829 * Note: the uses of %.*s in this function would be risky if the
830 * timezone names ever contain non-ASCII characters. However, all
831 * TZ abbreviations in the IANA database are plain ASCII.
832 */
833
834 if (print_tz)
835 {
836 if (tzn)
837 sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
838 else
839 {
840 hour = -(tz / SECS_PER_HOUR);
841 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
842 if (min != 0)
843 sprintf(str + strlen(str), "%+03d:%02d", hour, min);
844 else
845 sprintf(str + strlen(str), "%+03d", hour);
846 }
847 }
848 break;
849
850 case USE_GERMAN_DATES:
851 /* German variant on European style */
852
853 sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
854
855 sprintf(str + 5, ".%04d %02d:%02d",
856 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
857 tm->tm_hour, tm->tm_min);
858
859 /*
860 * Print fractional seconds if any. The field widths here should
861 * be at least equal to MAX_TIMESTAMP_PRECISION.
862 */
863 if (fsec != 0)
864 {
865 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
866 TrimTrailingZeros(str);
867 }
868 else
869 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
870
871 if (tm->tm_year <= 0)
872 sprintf(str + strlen(str), " BC");
873
874 if (print_tz)
875 {
876 if (tzn)
877 sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
878 else
879 {
880 hour = -(tz / SECS_PER_HOUR);
881 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
882 if (min != 0)
883 sprintf(str + strlen(str), "%+03d:%02d", hour, min);
884 else
885 sprintf(str + strlen(str), "%+03d", hour);
886 }
887 }
888 break;
889
890 case USE_POSTGRES_DATES:
891 default:
892 /* Backward-compatible with traditional Postgres abstime dates */
893
894 day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
895 tm->tm_wday = (int) ((day + date2j(2000, 1, 1) + 1) % 7);
896
897 memcpy(str, days[tm->tm_wday], 3);
898 strcpy(str + 3, " ");
899
900 if (EuroDates)
901 sprintf(str + 4, "%02d %3s", tm->tm_mday, months[tm->tm_mon - 1]);
902 else
903 sprintf(str + 4, "%3s %02d", months[tm->tm_mon - 1], tm->tm_mday);
904
905 sprintf(str + 10, " %02d:%02d", tm->tm_hour, tm->tm_min);
906
907 /*
908 * Print fractional seconds if any. The field widths here should
909 * be at least equal to MAX_TIMESTAMP_PRECISION.
910 */
911 if (fsec != 0)
912 {
913 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
914 TrimTrailingZeros(str);
915 }
916 else
917 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
918
919 sprintf(str + strlen(str), " %04d",
920 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1));
921 if (tm->tm_year <= 0)
922 sprintf(str + strlen(str), " BC");
923
924 if (print_tz)
925 {
926 if (tzn)
927 sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
928 else
929 {
930 /*
931 * We have a time zone, but no string version. Use the
932 * numeric form, but be sure to include a leading space to
933 * avoid formatting something which would be rejected by
934 * the date/time parser later. - thomas 2001-10-19
935 */
936 hour = -(tz / SECS_PER_HOUR);
937 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
938 if (min != 0)
939 sprintf(str + strlen(str), " %+03d:%02d", hour, min);
940 else
941 sprintf(str + strlen(str), " %+03d", hour);
942 }
943 }
944 break;
945 }
946}
947
948int
949GetEpochTime(struct tm *tm)
950{
951 struct tm *t0;
952 time_t epoch = 0;
953
954 t0 = gmtime(&epoch);
955
956 if (t0)
957 {
958 tm->tm_year = t0->tm_year + 1900;
959 tm->tm_mon = t0->tm_mon + 1;
960 tm->tm_mday = t0->tm_mday;
961 tm->tm_hour = t0->tm_hour;
962 tm->tm_min = t0->tm_min;
963 tm->tm_sec = t0->tm_sec;
964
965 return 0;
966 }
967
968 return -1;
969} /* GetEpochTime() */
970
971static void
972abstime2tm(AbsoluteTime _time, int *tzp, struct tm *tm, char **tzn)
973{
974 time_t time = (time_t) _time;
975 struct tm *tx;
976
977 errno = 0;
978 if (tzp != NULL)
979 tx = localtime((time_t *) &time);
980 else
981 tx = gmtime((time_t *) &time);
982
983 if (!tx)
984 {
985 errno = PGTYPES_TS_BAD_TIMESTAMP;
986 return;
987 }
988
989 tm->tm_year = tx->tm_year + 1900;
990 tm->tm_mon = tx->tm_mon + 1;
991 tm->tm_mday = tx->tm_mday;
992 tm->tm_hour = tx->tm_hour;
993 tm->tm_min = tx->tm_min;
994 tm->tm_sec = tx->tm_sec;
995 tm->tm_isdst = tx->tm_isdst;
996
997#if defined(HAVE_TM_ZONE)
998 tm->tm_gmtoff = tx->tm_gmtoff;
999 tm->tm_zone = tx->tm_zone;
1000
1001 if (tzp != NULL)
1002 {
1003 /*
1004 * We have a brute force time zone per SQL99? Then use it without
1005 * change since we have already rotated to the time zone.
1006 */
1007 *tzp = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
1008
1009 /*
1010 * FreeBSD man pages indicate that this should work - tgl 97/04/23
1011 */
1012 if (tzn != NULL)
1013 {
1014 /*
1015 * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1016 * contains an error message, which doesn't fit in the buffer
1017 */
1018 StrNCpy(*tzn, tm->tm_zone, MAXTZLEN + 1);
1019 if (strlen(tm->tm_zone) > MAXTZLEN)
1020 tm->tm_isdst = -1;
1021 }
1022 }
1023 else
1024 tm->tm_isdst = -1;
1025#elif defined(HAVE_INT_TIMEZONE)
1026 if (tzp != NULL)
1027 {
1028 *tzp = (tm->tm_isdst > 0) ? TIMEZONE_GLOBAL - SECS_PER_HOUR : TIMEZONE_GLOBAL;
1029
1030 if (tzn != NULL)
1031 {
1032 /*
1033 * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1034 * contains an error message, which doesn't fit in the buffer
1035 */
1036 StrNCpy(*tzn, TZNAME_GLOBAL[tm->tm_isdst], MAXTZLEN + 1);
1037 if (strlen(TZNAME_GLOBAL[tm->tm_isdst]) > MAXTZLEN)
1038 tm->tm_isdst = -1;
1039 }
1040 }
1041 else
1042 tm->tm_isdst = -1;
1043#else /* not (HAVE_TM_ZONE || HAVE_INT_TIMEZONE) */
1044 if (tzp != NULL)
1045 {
1046 /* default to UTC */
1047 *tzp = 0;
1048 if (tzn != NULL)
1049 *tzn = NULL;
1050 }
1051 else
1052 tm->tm_isdst = -1;
1053#endif
1054}
1055
1056void
1057GetCurrentDateTime(struct tm *tm)
1058{
1059 int tz;
1060
1061 abstime2tm(time(NULL), &tz, tm, NULL);
1062}
1063
1064void
1065dt2time(double jd, int *hour, int *min, int *sec, fsec_t *fsec)
1066{
1067 int64 time;
1068
1069 time = jd;
1070 *hour = time / USECS_PER_HOUR;
1071 time -= (*hour) * USECS_PER_HOUR;
1072 *min = time / USECS_PER_MINUTE;
1073 time -= (*min) * USECS_PER_MINUTE;
1074 *sec = time / USECS_PER_SEC;
1075 *fsec = time - (*sec * USECS_PER_SEC);
1076} /* dt2time() */
1077
1078
1079
1080/* DecodeNumberField()
1081 * Interpret numeric string as a concatenated date or time field.
1082 * Use the context of previously decoded fields to help with
1083 * the interpretation.
1084 */
1085static int
1086DecodeNumberField(int len, char *str, int fmask,
1087 int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits)
1088{
1089 char *cp;
1090
1091 /*
1092 * Have a decimal point? Then this is a date or something with a seconds
1093 * field...
1094 */
1095 if ((cp = strchr(str, '.')) != NULL)
1096 {
1097 char fstr[7];
1098 int i;
1099
1100 cp++;
1101
1102 /*
1103 * OK, we have at most six digits to care about. Let's construct a
1104 * string with those digits, zero-padded on the right, and then do the
1105 * conversion to an integer.
1106 *
1107 * XXX This truncates the seventh digit, unlike rounding it as the
1108 * backend does.
1109 */
1110 for (i = 0; i < 6; i++)
1111 fstr[i] = *cp != '\0' ? *cp++ : '0';
1112 fstr[i] = '\0';
1113 *fsec = strtol(fstr, NULL, 10);
1114 *cp = '\0';
1115 len = strlen(str);
1116 }
1117 /* No decimal point and no complete date yet? */
1118 else if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1119 {
1120 /* yyyymmdd? */
1121 if (len == 8)
1122 {
1123 *tmask = DTK_DATE_M;
1124
1125 tm->tm_mday = atoi(str + 6);
1126 *(str + 6) = '\0';
1127 tm->tm_mon = atoi(str + 4);
1128 *(str + 4) = '\0';
1129 tm->tm_year = atoi(str + 0);
1130
1131 return DTK_DATE;
1132 }
1133 /* yymmdd? */
1134 else if (len == 6)
1135 {
1136 *tmask = DTK_DATE_M;
1137 tm->tm_mday = atoi(str + 4);
1138 *(str + 4) = '\0';
1139 tm->tm_mon = atoi(str + 2);
1140 *(str + 2) = '\0';
1141 tm->tm_year = atoi(str + 0);
1142 *is2digits = true;
1143
1144 return DTK_DATE;
1145 }
1146 /* yyddd? */
1147 else if (len == 5)
1148 {
1149 *tmask = DTK_DATE_M;
1150 tm->tm_mday = atoi(str + 2);
1151 *(str + 2) = '\0';
1152 tm->tm_mon = 1;
1153 tm->tm_year = atoi(str + 0);
1154 *is2digits = true;
1155
1156 return DTK_DATE;
1157 }
1158 }
1159
1160 /* not all time fields are specified? */
1161 if ((fmask & DTK_TIME_M) != DTK_TIME_M)
1162 {
1163 /* hhmmss */
1164 if (len == 6)
1165 {
1166 *tmask = DTK_TIME_M;
1167 tm->tm_sec = atoi(str + 4);
1168 *(str + 4) = '\0';
1169 tm->tm_min = atoi(str + 2);
1170 *(str + 2) = '\0';
1171 tm->tm_hour = atoi(str + 0);
1172
1173 return DTK_TIME;
1174 }
1175 /* hhmm? */
1176 else if (len == 4)
1177 {
1178 *tmask = DTK_TIME_M;
1179 tm->tm_sec = 0;
1180 tm->tm_min = atoi(str + 2);
1181 *(str + 2) = '\0';
1182 tm->tm_hour = atoi(str + 0);
1183
1184 return DTK_TIME;
1185 }
1186 }
1187
1188 return -1;
1189} /* DecodeNumberField() */
1190
1191
1192/* DecodeNumber()
1193 * Interpret plain numeric field as a date value in context.
1194 */
1195static int
1196DecodeNumber(int flen, char *str, int fmask,
1197 int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits, bool EuroDates)
1198{
1199 int val;
1200 char *cp;
1201
1202 *tmask = 0;
1203
1204 val = strtol(str, &cp, 10);
1205 if (cp == str)
1206 return -1;
1207
1208 if (*cp == '.')
1209 {
1210 /*
1211 * More than two digits? Then could be a date or a run-together time:
1212 * 2001.360 20011225 040506.789
1213 */
1214 if (cp - str > 2)
1215 return DecodeNumberField(flen, str, (fmask | DTK_DATE_M),
1216 tmask, tm, fsec, is2digits);
1217
1218 *fsec = strtod(cp, &cp);
1219 if (*cp != '\0')
1220 return -1;
1221 }
1222 else if (*cp != '\0')
1223 return -1;
1224
1225 /* Special case day of year? */
1226 if (flen == 3 && (fmask & DTK_M(YEAR)) && val >= 1 && val <= 366)
1227 {
1228 *tmask = (DTK_M(DOY) | DTK_M(MONTH) | DTK_M(DAY));
1229 tm->tm_yday = val;
1230 j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
1231 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1232 }
1233
1234 /***
1235 * Enough digits to be unequivocal year? Used to test for 4 digits or
1236 * more, but we now test first for a three-digit doy so anything
1237 * bigger than two digits had better be an explicit year.
1238 * - thomas 1999-01-09
1239 * Back to requiring a 4 digit year. We accept a two digit
1240 * year farther down. - thomas 2000-03-28
1241 ***/
1242 else if (flen >= 4)
1243 {
1244 *tmask = DTK_M(YEAR);
1245
1246 /* already have a year? then see if we can substitute... */
1247 if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1248 tm->tm_year >= 1 && tm->tm_year <= 31)
1249 {
1250 tm->tm_mday = tm->tm_year;
1251 *tmask = DTK_M(DAY);
1252 }
1253
1254 tm->tm_year = val;
1255 }
1256
1257 /* already have year? then could be month */
1258 else if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1259 {
1260 *tmask = DTK_M(MONTH);
1261 tm->tm_mon = val;
1262 }
1263 /* no year and EuroDates enabled? then could be day */
1264 else if ((EuroDates || (fmask & DTK_M(MONTH))) &&
1265 !(fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1266 val >= 1 && val <= 31)
1267 {
1268 *tmask = DTK_M(DAY);
1269 tm->tm_mday = val;
1270 }
1271 else if (!(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1272 {
1273 *tmask = DTK_M(MONTH);
1274 tm->tm_mon = val;
1275 }
1276 else if (!(fmask & DTK_M(DAY)) && val >= 1 && val <= 31)
1277 {
1278 *tmask = DTK_M(DAY);
1279 tm->tm_mday = val;
1280 }
1281
1282 /*
1283 * Check for 2 or 4 or more digits, but currently we reach here only if
1284 * two digits. - thomas 2000-03-28
1285 */
1286 else if (!(fmask & DTK_M(YEAR)) && (flen >= 4 || flen == 2))
1287 {
1288 *tmask = DTK_M(YEAR);
1289 tm->tm_year = val;
1290
1291 /* adjust ONLY if exactly two digits... */
1292 *is2digits = (flen == 2);
1293 }
1294 else
1295 return -1;
1296
1297 return 0;
1298} /* DecodeNumber() */
1299
1300/* DecodeDate()
1301 * Decode date string which includes delimiters.
1302 * Insist on a complete set of fields.
1303 */
1304static int
1305DecodeDate(char *str, int fmask, int *tmask, struct tm *tm, bool EuroDates)
1306{
1307 fsec_t fsec;
1308
1309 int nf = 0;
1310 int i,
1311 len;
1312 bool bc = false;
1313 bool is2digits = false;
1314 int type,
1315 val,
1316 dmask = 0;
1317 char *field[MAXDATEFIELDS];
1318
1319 /* parse this string... */
1320 while (*str != '\0' && nf < MAXDATEFIELDS)
1321 {
1322 /* skip field separators */
1323 while (!isalnum((unsigned char) *str))
1324 str++;
1325
1326 field[nf] = str;
1327 if (isdigit((unsigned char) *str))
1328 {
1329 while (isdigit((unsigned char) *str))
1330 str++;
1331 }
1332 else if (isalpha((unsigned char) *str))
1333 {
1334 while (isalpha((unsigned char) *str))
1335 str++;
1336 }
1337
1338 /* Just get rid of any non-digit, non-alpha characters... */
1339 if (*str != '\0')
1340 *str++ = '\0';
1341 nf++;
1342 }
1343
1344#if 0
1345 /* don't allow too many fields */
1346 if (nf > 3)
1347 return -1;
1348#endif
1349
1350 *tmask = 0;
1351
1352 /* look first for text fields, since that will be unambiguous month */
1353 for (i = 0; i < nf; i++)
1354 {
1355 if (isalpha((unsigned char) *field[i]))
1356 {
1357 type = DecodeSpecial(i, field[i], &val);
1358 if (type == IGNORE_DTF)
1359 continue;
1360
1361 dmask = DTK_M(type);
1362 switch (type)
1363 {
1364 case MONTH:
1365 tm->tm_mon = val;
1366 break;
1367
1368 case ADBC:
1369 bc = (val == BC);
1370 break;
1371
1372 default:
1373 return -1;
1374 }
1375 if (fmask & dmask)
1376 return -1;
1377
1378 fmask |= dmask;
1379 *tmask |= dmask;
1380
1381 /* mark this field as being completed */
1382 field[i] = NULL;
1383 }
1384 }
1385
1386 /* now pick up remaining numeric fields */
1387 for (i = 0; i < nf; i++)
1388 {
1389 if (field[i] == NULL)
1390 continue;
1391
1392 if ((len = strlen(field[i])) <= 0)
1393 return -1;
1394
1395 if (DecodeNumber(len, field[i], fmask, &dmask, tm, &fsec, &is2digits, EuroDates) != 0)
1396 return -1;
1397
1398 if (fmask & dmask)
1399 return -1;
1400
1401 fmask |= dmask;
1402 *tmask |= dmask;
1403 }
1404
1405 if ((fmask & ~(DTK_M(DOY) | DTK_M(TZ))) != DTK_DATE_M)
1406 return -1;
1407
1408 /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
1409 if (bc)
1410 {
1411 if (tm->tm_year > 0)
1412 tm->tm_year = -(tm->tm_year - 1);
1413 else
1414 return -1;
1415 }
1416 else if (is2digits)
1417 {
1418 if (tm->tm_year < 70)
1419 tm->tm_year += 2000;
1420 else if (tm->tm_year < 100)
1421 tm->tm_year += 1900;
1422 }
1423
1424 return 0;
1425} /* DecodeDate() */
1426
1427
1428/* DecodeTime()
1429 * Decode time string which includes delimiters.
1430 * Only check the lower limit on hours, since this same code
1431 * can be used to represent time spans.
1432 */
1433int
1434DecodeTime(char *str, int *tmask, struct tm *tm, fsec_t *fsec)
1435{
1436 char *cp;
1437
1438 *tmask = DTK_TIME_M;
1439
1440 tm->tm_hour = strtol(str, &cp, 10);
1441 if (*cp != ':')
1442 return -1;
1443 str = cp + 1;
1444 tm->tm_min = strtol(str, &cp, 10);
1445 if (*cp == '\0')
1446 {
1447 tm->tm_sec = 0;
1448 *fsec = 0;
1449 }
1450 else if (*cp != ':')
1451 return -1;
1452 else
1453 {
1454 str = cp + 1;
1455 tm->tm_sec = strtol(str, &cp, 10);
1456 if (*cp == '\0')
1457 *fsec = 0;
1458 else if (*cp == '.')
1459 {
1460 char fstr[7];
1461 int i;
1462
1463 cp++;
1464
1465 /*
1466 * OK, we have at most six digits to care about. Let's construct a
1467 * string with those digits, zero-padded on the right, and then do
1468 * the conversion to an integer.
1469 *
1470 * XXX This truncates the seventh digit, unlike rounding it as the
1471 * backend does.
1472 */
1473 for (i = 0; i < 6; i++)
1474 fstr[i] = *cp != '\0' ? *cp++ : '0';
1475 fstr[i] = '\0';
1476 *fsec = strtol(fstr, &cp, 10);
1477 if (*cp != '\0')
1478 return -1;
1479 }
1480 else
1481 return -1;
1482 }
1483
1484 /* do a sanity check */
1485 if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_min > 59 ||
1486 tm->tm_sec < 0 || tm->tm_sec > 59 || *fsec >= USECS_PER_SEC)
1487 return -1;
1488
1489 return 0;
1490} /* DecodeTime() */
1491
1492/* DecodeTimezone()
1493 * Interpret string as a numeric timezone.
1494 *
1495 * Note: we allow timezone offsets up to 13:59. There are places that
1496 * use +1300 summer time.
1497 */
1498static int
1499DecodeTimezone(char *str, int *tzp)
1500{
1501 int tz;
1502 int hr,
1503 min;
1504 char *cp;
1505 int len;
1506
1507 /* assume leading character is "+" or "-" */
1508 hr = strtol(str + 1, &cp, 10);
1509
1510 /* explicit delimiter? */
1511 if (*cp == ':')
1512 min = strtol(cp + 1, &cp, 10);
1513 /* otherwise, might have run things together... */
1514 else if (*cp == '\0' && (len = strlen(str)) > 3)
1515 {
1516 min = strtol(str + len - 2, &cp, 10);
1517 if (min < 0 || min >= 60)
1518 return -1;
1519
1520 *(str + len - 2) = '\0';
1521 hr = strtol(str + 1, &cp, 10);
1522 if (hr < 0 || hr > 13)
1523 return -1;
1524 }
1525 else
1526 min = 0;
1527
1528 tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE;
1529 if (*str == '-')
1530 tz = -tz;
1531
1532 *tzp = -tz;
1533 return *cp != '\0';
1534} /* DecodeTimezone() */
1535
1536
1537/* DecodePosixTimezone()
1538 * Interpret string as a POSIX-compatible timezone:
1539 * PST-hh:mm
1540 * PST+h
1541 * - thomas 2000-03-15
1542 */
1543static int
1544DecodePosixTimezone(char *str, int *tzp)
1545{
1546 int val,
1547 tz;
1548 int type;
1549 char *cp;
1550 char delim;
1551
1552 cp = str;
1553 while (*cp != '\0' && isalpha((unsigned char) *cp))
1554 cp++;
1555
1556 if (DecodeTimezone(cp, &tz) != 0)
1557 return -1;
1558
1559 delim = *cp;
1560 *cp = '\0';
1561 type = DecodeSpecial(MAXDATEFIELDS - 1, str, &val);
1562 *cp = delim;
1563
1564 switch (type)
1565 {
1566 case DTZ:
1567 case TZ:
1568 *tzp = -(val + tz);
1569 break;
1570
1571 default:
1572 return -1;
1573 }
1574
1575 return 0;
1576} /* DecodePosixTimezone() */
1577
1578/* ParseDateTime()
1579 * Break string into tokens based on a date/time context.
1580 * Several field types are assigned:
1581 * DTK_NUMBER - digits and (possibly) a decimal point
1582 * DTK_DATE - digits and two delimiters, or digits and text
1583 * DTK_TIME - digits, colon delimiters, and possibly a decimal point
1584 * DTK_STRING - text (no digits)
1585 * DTK_SPECIAL - leading "+" or "-" followed by text
1586 * DTK_TZ - leading "+" or "-" followed by digits
1587 * Note that some field types can hold unexpected items:
1588 * DTK_NUMBER can hold date fields (yy.ddd)
1589 * DTK_STRING can hold months (January) and time zones (PST)
1590 * DTK_DATE can hold Posix time zones (GMT-8)
1591 *
1592 * The "lowstr" work buffer must have at least strlen(timestr) + MAXDATEFIELDS
1593 * bytes of space. On output, field[] entries will point into it.
1594 * The field[] and ftype[] arrays must have at least MAXDATEFIELDS entries.
1595 */
1596int
1597ParseDateTime(char *timestr, char *lowstr,
1598 char **field, int *ftype, int *numfields, char **endstr)
1599{
1600 int nf = 0;
1601 char *lp = lowstr;
1602
1603 *endstr = timestr;
1604 /* outer loop through fields */
1605 while (*(*endstr) != '\0')
1606 {
1607 /* Record start of current field */
1608 if (nf >= MAXDATEFIELDS)
1609 return -1;
1610 field[nf] = lp;
1611
1612 /* leading digit? then date or time */
1613 if (isdigit((unsigned char) *(*endstr)))
1614 {
1615 *lp++ = *(*endstr)++;
1616 while (isdigit((unsigned char) *(*endstr)))
1617 *lp++ = *(*endstr)++;
1618
1619 /* time field? */
1620 if (*(*endstr) == ':')
1621 {
1622 ftype[nf] = DTK_TIME;
1623 *lp++ = *(*endstr)++;
1624 while (isdigit((unsigned char) *(*endstr)) ||
1625 (*(*endstr) == ':') || (*(*endstr) == '.'))
1626 *lp++ = *(*endstr)++;
1627 }
1628 /* date field? allow embedded text month */
1629 else if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1630 {
1631 /* save delimiting character to use later */
1632 char *dp = (*endstr);
1633
1634 *lp++ = *(*endstr)++;
1635 /* second field is all digits? then no embedded text month */
1636 if (isdigit((unsigned char) *(*endstr)))
1637 {
1638 ftype[nf] = (*dp == '.') ? DTK_NUMBER : DTK_DATE;
1639 while (isdigit((unsigned char) *(*endstr)))
1640 *lp++ = *(*endstr)++;
1641
1642 /*
1643 * insist that the delimiters match to get a three-field
1644 * date.
1645 */
1646 if (*(*endstr) == *dp)
1647 {
1648 ftype[nf] = DTK_DATE;
1649 *lp++ = *(*endstr)++;
1650 while (isdigit((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1651 *lp++ = *(*endstr)++;
1652 }
1653 }
1654 else
1655 {
1656 ftype[nf] = DTK_DATE;
1657 while (isalnum((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1658 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1659 }
1660 }
1661
1662 /*
1663 * otherwise, number only and will determine year, month, day, or
1664 * concatenated fields later...
1665 */
1666 else
1667 ftype[nf] = DTK_NUMBER;
1668 }
1669 /* Leading decimal point? Then fractional seconds... */
1670 else if (*(*endstr) == '.')
1671 {
1672 *lp++ = *(*endstr)++;
1673 while (isdigit((unsigned char) *(*endstr)))
1674 *lp++ = *(*endstr)++;
1675
1676 ftype[nf] = DTK_NUMBER;
1677 }
1678
1679 /*
1680 * text? then date string, month, day of week, special, or timezone
1681 */
1682 else if (isalpha((unsigned char) *(*endstr)))
1683 {
1684 ftype[nf] = DTK_STRING;
1685 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1686 while (isalpha((unsigned char) *(*endstr)))
1687 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1688
1689 /*
1690 * Full date string with leading text month? Could also be a POSIX
1691 * time zone...
1692 */
1693 if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1694 {
1695 char *dp = (*endstr);
1696
1697 ftype[nf] = DTK_DATE;
1698 *lp++ = *(*endstr)++;
1699 while (isdigit((unsigned char) *(*endstr)) || *(*endstr) == *dp)
1700 *lp++ = *(*endstr)++;
1701 }
1702 }
1703 /* skip leading spaces */
1704 else if (isspace((unsigned char) *(*endstr)))
1705 {
1706 (*endstr)++;
1707 continue;
1708 }
1709 /* sign? then special or numeric timezone */
1710 else if (*(*endstr) == '+' || *(*endstr) == '-')
1711 {
1712 *lp++ = *(*endstr)++;
1713 /* soak up leading whitespace */
1714 while (isspace((unsigned char) *(*endstr)))
1715 (*endstr)++;
1716 /* numeric timezone? */
1717 if (isdigit((unsigned char) *(*endstr)))
1718 {
1719 ftype[nf] = DTK_TZ;
1720 *lp++ = *(*endstr)++;
1721 while (isdigit((unsigned char) *(*endstr)) ||
1722 (*(*endstr) == ':') || (*(*endstr) == '.'))
1723 *lp++ = *(*endstr)++;
1724 }
1725 /* special? */
1726 else if (isalpha((unsigned char) *(*endstr)))
1727 {
1728 ftype[nf] = DTK_SPECIAL;
1729 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1730 while (isalpha((unsigned char) *(*endstr)))
1731 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1732 }
1733 /* otherwise something wrong... */
1734 else
1735 return -1;
1736 }
1737 /* ignore punctuation but use as delimiter */
1738 else if (ispunct((unsigned char) *(*endstr)))
1739 {
1740 (*endstr)++;
1741 continue;
1742
1743 }
1744 /* otherwise, something is not right... */
1745 else
1746 return -1;
1747
1748 /* force in a delimiter after each field */
1749 *lp++ = '\0';
1750 nf++;
1751 }
1752
1753 *numfields = nf;
1754
1755 return 0;
1756} /* ParseDateTime() */
1757
1758
1759/* DecodeDateTime()
1760 * Interpret previously parsed fields for general date and time.
1761 * Return 0 if full date, 1 if only time, and -1 if problems.
1762 * External format(s):
1763 * "<weekday> <month>-<day>-<year> <hour>:<minute>:<second>"
1764 * "Fri Feb-7-1997 15:23:27"
1765 * "Feb-7-1997 15:23:27"
1766 * "2-7-1997 15:23:27"
1767 * "1997-2-7 15:23:27"
1768 * "1997.038 15:23:27" (day of year 1-366)
1769 * Also supports input in compact time:
1770 * "970207 152327"
1771 * "97038 152327"
1772 * "20011225T040506.789-07"
1773 *
1774 * Use the system-provided functions to get the current time zone
1775 * if not specified in the input string.
1776 * If the date is outside the time_t system-supported time range,
1777 * then assume UTC time zone. - thomas 1997-05-27
1778 */
1779int
1780DecodeDateTime(char **field, int *ftype, int nf,
1781 int *dtype, struct tm *tm, fsec_t *fsec, bool EuroDates)
1782{
1783 int fmask = 0,
1784 tmask,
1785 type;
1786 int ptype = 0; /* "prefix type" for ISO y2001m02d04 format */
1787 int i;
1788 int val;
1789 int mer = HR24;
1790 bool haveTextMonth = false;
1791 bool is2digits = false;
1792 bool bc = false;
1793 int t = 0;
1794 int *tzp = &t;
1795
1796 /***
1797 * We'll insist on at least all of the date fields, but initialize the
1798 * remaining fields in case they are not set later...
1799 ***/
1800 *dtype = DTK_DATE;
1801 tm->tm_hour = 0;
1802 tm->tm_min = 0;
1803 tm->tm_sec = 0;
1804 *fsec = 0;
1805 /* don't know daylight savings time status apriori */
1806 tm->tm_isdst = -1;
1807 if (tzp != NULL)
1808 *tzp = 0;
1809
1810 for (i = 0; i < nf; i++)
1811 {
1812 switch (ftype[i])
1813 {
1814 case DTK_DATE:
1815 /***
1816 * Integral julian day with attached time zone?
1817 * All other forms with JD will be separated into
1818 * distinct fields, so we handle just this case here.
1819 ***/
1820 if (ptype == DTK_JULIAN)
1821 {
1822 char *cp;
1823 int val;
1824
1825 if (tzp == NULL)
1826 return -1;
1827
1828 val = strtol(field[i], &cp, 10);
1829 if (*cp != '-')
1830 return -1;
1831
1832 j2date(val, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1833 /* Get the time zone from the end of the string */
1834 if (DecodeTimezone(cp, tzp) != 0)
1835 return -1;
1836
1837 tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1838 ptype = 0;
1839 break;
1840 }
1841 /***
1842 * Already have a date? Then this might be a POSIX time
1843 * zone with an embedded dash (e.g. "PST-3" == "EST") or
1844 * a run-together time with trailing time zone (e.g. hhmmss-zz).
1845 * - thomas 2001-12-25
1846 ***/
1847 else if (((fmask & DTK_DATE_M) == DTK_DATE_M)
1848 || (ptype != 0))
1849 {
1850 /* No time zone accepted? Then quit... */
1851 if (tzp == NULL)
1852 return -1;
1853
1854 if (isdigit((unsigned char) *field[i]) || ptype != 0)
1855 {
1856 char *cp;
1857
1858 if (ptype != 0)
1859 {
1860 /* Sanity check; should not fail this test */
1861 if (ptype != DTK_TIME)
1862 return -1;
1863 ptype = 0;
1864 }
1865
1866 /*
1867 * Starts with a digit but we already have a time
1868 * field? Then we are in trouble with a date and time
1869 * already...
1870 */
1871 if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1872 return -1;
1873
1874 if ((cp = strchr(field[i], '-')) == NULL)
1875 return -1;
1876
1877 /* Get the time zone from the end of the string */
1878 if (DecodeTimezone(cp, tzp) != 0)
1879 return -1;
1880 *cp = '\0';
1881
1882 /*
1883 * Then read the rest of the field as a concatenated
1884 * time
1885 */
1886 if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], fmask,
1887 &tmask, tm, fsec, &is2digits)) < 0)
1888 return -1;
1889
1890 /*
1891 * modify tmask after returning from
1892 * DecodeNumberField()
1893 */
1894 tmask |= DTK_M(TZ);
1895 }
1896 else
1897 {
1898 if (DecodePosixTimezone(field[i], tzp) != 0)
1899 return -1;
1900
1901 ftype[i] = DTK_TZ;
1902 tmask = DTK_M(TZ);
1903 }
1904 }
1905 else if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
1906 return -1;
1907 break;
1908
1909 case DTK_TIME:
1910 if (DecodeTime(field[i], &tmask, tm, fsec) != 0)
1911 return -1;
1912
1913 /*
1914 * Check upper limit on hours; other limits checked in
1915 * DecodeTime()
1916 */
1917 /* test for > 24:00:00 */
1918 if (tm->tm_hour > 24 ||
1919 (tm->tm_hour == 24 && (tm->tm_min > 0 || tm->tm_sec > 0)))
1920 return -1;
1921 break;
1922
1923 case DTK_TZ:
1924 {
1925 int tz;
1926
1927 if (tzp == NULL)
1928 return -1;
1929
1930 if (DecodeTimezone(field[i], &tz) != 0)
1931 return -1;
1932
1933 /*
1934 * Already have a time zone? Then maybe this is the second
1935 * field of a POSIX time: EST+3 (equivalent to PST)
1936 */
1937 if (i > 0 && (fmask & DTK_M(TZ)) != 0 &&
1938 ftype[i - 1] == DTK_TZ &&
1939 isalpha((unsigned char) *field[i - 1]))
1940 {
1941 *tzp -= tz;
1942 tmask = 0;
1943 }
1944 else
1945 {
1946 *tzp = tz;
1947 tmask = DTK_M(TZ);
1948 }
1949 }
1950 break;
1951
1952 case DTK_NUMBER:
1953
1954 /*
1955 * Was this an "ISO date" with embedded field labels? An
1956 * example is "y2001m02d04" - thomas 2001-02-04
1957 */
1958 if (ptype != 0)
1959 {
1960 char *cp;
1961 int val;
1962
1963 val = strtol(field[i], &cp, 10);
1964
1965 /*
1966 * only a few kinds are allowed to have an embedded
1967 * decimal
1968 */
1969 if (*cp == '.')
1970 switch (ptype)
1971 {
1972 case DTK_JULIAN:
1973 case DTK_TIME:
1974 case DTK_SECOND:
1975 break;
1976 default:
1977 return 1;
1978 break;
1979 }
1980 else if (*cp != '\0')
1981 return -1;
1982
1983 switch (ptype)
1984 {
1985 case DTK_YEAR:
1986 tm->tm_year = val;
1987 tmask = DTK_M(YEAR);
1988 break;
1989
1990 case DTK_MONTH:
1991
1992 /*
1993 * already have a month and hour? then assume
1994 * minutes
1995 */
1996 if ((fmask & DTK_M(MONTH)) != 0 &&
1997 (fmask & DTK_M(HOUR)) != 0)
1998 {
1999 tm->tm_min = val;
2000 tmask = DTK_M(MINUTE);
2001 }
2002 else
2003 {
2004 tm->tm_mon = val;
2005 tmask = DTK_M(MONTH);
2006 }
2007 break;
2008
2009 case DTK_DAY:
2010 tm->tm_mday = val;
2011 tmask = DTK_M(DAY);
2012 break;
2013
2014 case DTK_HOUR:
2015 tm->tm_hour = val;
2016 tmask = DTK_M(HOUR);
2017 break;
2018
2019 case DTK_MINUTE:
2020 tm->tm_min = val;
2021 tmask = DTK_M(MINUTE);
2022 break;
2023
2024 case DTK_SECOND:
2025 tm->tm_sec = val;
2026 tmask = DTK_M(SECOND);
2027 if (*cp == '.')
2028 {
2029 double frac;
2030
2031 frac = strtod(cp, &cp);
2032 if (*cp != '\0')
2033 return -1;
2034 *fsec = frac * 1000000;
2035 }
2036 break;
2037
2038 case DTK_TZ:
2039 tmask = DTK_M(TZ);
2040 if (DecodeTimezone(field[i], tzp) != 0)
2041 return -1;
2042 break;
2043
2044 case DTK_JULIAN:
2045 /***
2046 * previous field was a label for "julian date"?
2047 ***/
2048 tmask = DTK_DATE_M;
2049 j2date(val, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2050 /* fractional Julian Day? */
2051 if (*cp == '.')
2052 {
2053 double time;
2054
2055 time = strtod(cp, &cp);
2056 if (*cp != '\0')
2057 return -1;
2058
2059 tmask |= DTK_TIME_M;
2060 dt2time((time * USECS_PER_DAY), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
2061 }
2062 break;
2063
2064 case DTK_TIME:
2065 /* previous field was "t" for ISO time */
2066 if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], (fmask | DTK_DATE_M),
2067 &tmask, tm, fsec, &is2digits)) < 0)
2068 return -1;
2069
2070 if (tmask != DTK_TIME_M)
2071 return -1;
2072 break;
2073
2074 default:
2075 return -1;
2076 break;
2077 }
2078
2079 ptype = 0;
2080 *dtype = DTK_DATE;
2081 }
2082 else
2083 {
2084 char *cp;
2085 int flen;
2086
2087 flen = strlen(field[i]);
2088 cp = strchr(field[i], '.');
2089
2090 /* Embedded decimal and no date yet? */
2091 if (cp != NULL && !(fmask & DTK_DATE_M))
2092 {
2093 if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
2094 return -1;
2095 }
2096 /* embedded decimal and several digits before? */
2097 else if (cp != NULL && flen - strlen(cp) > 2)
2098 {
2099 /*
2100 * Interpret as a concatenated date or time Set the
2101 * type field to allow decoding other fields later.
2102 * Example: 20011223 or 040506
2103 */
2104 if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2105 &tmask, tm, fsec, &is2digits)) < 0)
2106 return -1;
2107 }
2108 else if (flen > 4)
2109 {
2110 if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2111 &tmask, tm, fsec, &is2digits)) < 0)
2112 return -1;
2113 }
2114 /* otherwise it is a single date/time field... */
2115 else if (DecodeNumber(flen, field[i], fmask,
2116 &tmask, tm, fsec, &is2digits, EuroDates) != 0)
2117 return -1;
2118 }
2119 break;
2120
2121 case DTK_STRING:
2122 case DTK_SPECIAL:
2123 type = DecodeSpecial(i, field[i], &val);
2124 if (type == IGNORE_DTF)
2125 continue;
2126
2127 tmask = DTK_M(type);
2128 switch (type)
2129 {
2130 case RESERV:
2131 switch (val)
2132 {
2133 case DTK_NOW:
2134 tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
2135 *dtype = DTK_DATE;
2136 GetCurrentDateTime(tm);
2137 break;
2138
2139 case DTK_YESTERDAY:
2140 tmask = DTK_DATE_M;
2141 *dtype = DTK_DATE;
2142 GetCurrentDateTime(tm);
2143 j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - 1,
2144 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2145 tm->tm_hour = 0;
2146 tm->tm_min = 0;
2147 tm->tm_sec = 0;
2148 break;
2149
2150 case DTK_TODAY:
2151 tmask = DTK_DATE_M;
2152 *dtype = DTK_DATE;
2153 GetCurrentDateTime(tm);
2154 tm->tm_hour = 0;
2155 tm->tm_min = 0;
2156 tm->tm_sec = 0;
2157 break;
2158
2159 case DTK_TOMORROW:
2160 tmask = DTK_DATE_M;
2161 *dtype = DTK_DATE;
2162 GetCurrentDateTime(tm);
2163 j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) + 1,
2164 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2165 tm->tm_hour = 0;
2166 tm->tm_min = 0;
2167 tm->tm_sec = 0;
2168 break;
2169
2170 case DTK_ZULU:
2171 tmask = (DTK_TIME_M | DTK_M(TZ));
2172 *dtype = DTK_DATE;
2173 tm->tm_hour = 0;
2174 tm->tm_min = 0;
2175 tm->tm_sec = 0;
2176 if (tzp != NULL)
2177 *tzp = 0;
2178 break;
2179
2180 default:
2181 *dtype = val;
2182 }
2183
2184 break;
2185
2186 case MONTH:
2187
2188 /*
2189 * already have a (numeric) month? then see if we can
2190 * substitute...
2191 */
2192 if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
2193 !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 && tm->tm_mon <= 31)
2194 {
2195 tm->tm_mday = tm->tm_mon;
2196 tmask = DTK_M(DAY);
2197 }
2198 haveTextMonth = true;
2199 tm->tm_mon = val;
2200 break;
2201
2202 case DTZMOD:
2203
2204 /*
2205 * daylight savings time modifier (solves "MET DST"
2206 * syntax)
2207 */
2208 tmask |= DTK_M(DTZ);
2209 tm->tm_isdst = 1;
2210 if (tzp == NULL)
2211 return -1;
2212 *tzp -= val;
2213 break;
2214
2215 case DTZ:
2216
2217 /*
2218 * set mask for TZ here _or_ check for DTZ later when
2219 * getting default timezone
2220 */
2221 tmask |= DTK_M(TZ);
2222 tm->tm_isdst = 1;
2223 if (tzp == NULL)
2224 return -1;
2225 *tzp = -val;
2226 ftype[i] = DTK_TZ;
2227 break;
2228
2229 case TZ:
2230 tm->tm_isdst = 0;
2231 if (tzp == NULL)
2232 return -1;
2233 *tzp = -val;
2234 ftype[i] = DTK_TZ;
2235 break;
2236
2237 case IGNORE_DTF:
2238 break;
2239
2240 case AMPM:
2241 mer = val;
2242 break;
2243
2244 case ADBC:
2245 bc = (val == BC);
2246 break;
2247
2248 case DOW:
2249 tm->tm_wday = val;
2250 break;
2251
2252 case UNITS:
2253 tmask = 0;
2254 ptype = val;
2255 break;
2256
2257 case ISOTIME:
2258
2259 /*
2260 * This is a filler field "t" indicating that the next
2261 * field is time. Try to verify that this is sensible.
2262 */
2263 tmask = 0;
2264
2265 /* No preceding date? Then quit... */
2266 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2267 return -1;
2268
2269 /***
2270 * We will need one of the following fields:
2271 * DTK_NUMBER should be hhmmss.fff
2272 * DTK_TIME should be hh:mm:ss.fff
2273 * DTK_DATE should be hhmmss-zz
2274 ***/
2275 if (i >= nf - 1 ||
2276 (ftype[i + 1] != DTK_NUMBER &&
2277 ftype[i + 1] != DTK_TIME &&
2278 ftype[i + 1] != DTK_DATE))
2279 return -1;
2280
2281 ptype = val;
2282 break;
2283
2284 default:
2285 return -1;
2286 }
2287 break;
2288
2289 default:
2290 return -1;
2291 }
2292
2293 if (tmask & fmask)
2294 return -1;
2295 fmask |= tmask;
2296 }
2297
2298 /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
2299 if (bc)
2300 {
2301 if (tm->tm_year > 0)
2302 tm->tm_year = -(tm->tm_year - 1);
2303 else
2304 return -1;
2305 }
2306 else if (is2digits)
2307 {
2308 if (tm->tm_year < 70)
2309 tm->tm_year += 2000;
2310 else if (tm->tm_year < 100)
2311 tm->tm_year += 1900;
2312 }
2313
2314 if (mer != HR24 && tm->tm_hour > 12)
2315 return -1;
2316 if (mer == AM && tm->tm_hour == 12)
2317 tm->tm_hour = 0;
2318 else if (mer == PM && tm->tm_hour != 12)
2319 tm->tm_hour += 12;
2320
2321 /* do additional checking for full date specs... */
2322 if (*dtype == DTK_DATE)
2323 {
2324 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2325 return ((fmask & DTK_TIME_M) == DTK_TIME_M) ? 1 : -1;
2326
2327 /*
2328 * check for valid day of month, now that we know for sure the month
2329 * and year...
2330 */
2331 if (tm->tm_mday < 1 || tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2332 return -1;
2333
2334 /*
2335 * backend tried to find local timezone here but we don't use the
2336 * result afterwards anyway so we only check for this error: daylight
2337 * savings time modifier but no standard timezone?
2338 */
2339 if ((fmask & DTK_DATE_M) == DTK_DATE_M && tzp != NULL && !(fmask & DTK_M(TZ)) && (fmask & DTK_M(DTZMOD)))
2340 return -1;
2341 }
2342
2343 return 0;
2344} /* DecodeDateTime() */
2345
2346/* Function works as follows:
2347 *
2348 *
2349 * */
2350
2351static char *
2352find_end_token(char *str, char *fmt)
2353{
2354 /*
2355 * str: here is28the day12the hour fmt: here is%dthe day%hthe hour
2356 *
2357 * we extract the 28, we read the percent sign and the type "d" then this
2358 * functions gets called as find_end_token("28the day12the hour", "the
2359 * day%hthehour")
2360 *
2361 * fmt points to "the day%hthehour", next_percent points to %hthehour and
2362 * we have to find a match for everything between these positions ("the
2363 * day"). We look for "the day" in str and know that the pattern we are
2364 * about to scan ends where this string starts (right after the "28")
2365 *
2366 * At the end, *fmt is '\0' and *str isn't. end_position then is
2367 * unchanged.
2368 */
2369 char *end_position = NULL;
2370 char *next_percent,
2371 *subst_location = NULL;
2372 int scan_offset = 0;
2373 char last_char;
2374
2375 /* are we at the end? */
2376 if (!*fmt)
2377 {
2378 end_position = fmt;
2379 return end_position;
2380 }
2381
2382 /* not at the end */
2383 while (fmt[scan_offset] == '%' && fmt[scan_offset + 1])
2384 {
2385 /*
2386 * there is no delimiter, skip to the next delimiter if we're reading
2387 * a number and then something that is not a number "9:15pm", we might
2388 * be able to recover with the strtol end pointer. Go for the next
2389 * percent sign
2390 */
2391 scan_offset += 2;
2392 }
2393 next_percent = strchr(fmt + scan_offset, '%');
2394 if (next_percent)
2395 {
2396 /*
2397 * we don't want to allocate extra memory, so we temporarily set the
2398 * '%' sign to '\0' and call strstr However since we allow whitespace
2399 * to float around everything, we have to shorten the pattern until we
2400 * reach a non-whitespace character
2401 */
2402
2403 subst_location = next_percent;
2404 while (*(subst_location - 1) == ' ' && subst_location - 1 > fmt + scan_offset)
2405 subst_location--;
2406 last_char = *subst_location;
2407 *subst_location = '\0';
2408
2409 /*
2410 * the haystack is the str and the needle is the original fmt but it
2411 * ends at the position where the next percent sign would be
2412 */
2413
2414 /*
2415 * There is one special case. Imagine: str = " 2", fmt = "%d %...",
2416 * since we want to allow blanks as "dynamic" padding we have to
2417 * accept this. Now, we are called with a fmt of " %..." and look for
2418 * " " in str. We find it at the first position and never read the
2419 * 2...
2420 */
2421 while (*str == ' ')
2422 str++;
2423 end_position = strstr(str, fmt + scan_offset);
2424 *subst_location = last_char;
2425 }
2426 else
2427 {
2428 /*
2429 * there is no other percent sign. So everything up to the end has to
2430 * match.
2431 */
2432 end_position = str + strlen(str);
2433 }
2434 if (!end_position)
2435 {
2436 /*
2437 * maybe we have the following case:
2438 *
2439 * str = "4:15am" fmt = "%M:%S %p"
2440 *
2441 * at this place we could have
2442 *
2443 * str = "15am" fmt = " %p"
2444 *
2445 * and have set fmt to " " because overwrote the % sign with a NULL
2446 *
2447 * In this case where we would have to match a space but can't find
2448 * it, set end_position to the end of the string
2449 */
2450 if ((fmt + scan_offset)[0] == ' ' && fmt + scan_offset + 1 == subst_location)
2451 end_position = str + strlen(str);
2452 }
2453 return end_position;
2454}
2455
2456static int
2457pgtypes_defmt_scan(union un_fmt_comb *scan_val, int scan_type, char **pstr, char *pfmt)
2458{
2459 /*
2460 * scan everything between pstr and pstr_end. This is not including the
2461 * last character so we might set it to '\0' for the parsing
2462 */
2463
2464 char last_char;
2465 int err = 0;
2466 char *pstr_end;
2467 char *strtol_end = NULL;
2468
2469 while (**pstr == ' ')
2470 pstr++;
2471 pstr_end = find_end_token(*pstr, pfmt);
2472 if (!pstr_end)
2473 {
2474 /* there was an error, no match */
2475 return 1;
2476 }
2477 last_char = *pstr_end;
2478 *pstr_end = '\0';
2479
2480 switch (scan_type)
2481 {
2482 case PGTYPES_TYPE_UINT:
2483
2484 /*
2485 * numbers may be blank-padded, this is the only deviation from
2486 * the fmt-string we accept
2487 */
2488 while (**pstr == ' ')
2489 (*pstr)++;
2490 errno = 0;
2491 scan_val->uint_val = (unsigned int) strtol(*pstr, &strtol_end, 10);
2492 if (errno)
2493 err = 1;
2494 break;
2495 case PGTYPES_TYPE_UINT_LONG:
2496 while (**pstr == ' ')
2497 (*pstr)++;
2498 errno = 0;
2499 scan_val->luint_val = (unsigned long int) strtol(*pstr, &strtol_end, 10);
2500 if (errno)
2501 err = 1;
2502 break;
2503 case PGTYPES_TYPE_STRING_MALLOCED:
2504 scan_val->str_val = pgtypes_strdup(*pstr);
2505 if (scan_val->str_val == NULL)
2506 err = 1;
2507 break;
2508 }
2509 if (strtol_end && *strtol_end)
2510 *pstr = strtol_end;
2511 else
2512 *pstr = pstr_end;
2513 *pstr_end = last_char;
2514 return err;
2515}
2516
2517/* XXX range checking */
2518int
2519PGTYPEStimestamp_defmt_scan(char **str, char *fmt, timestamp * d,
2520 int *year, int *month, int *day,
2521 int *hour, int *minute, int *second,
2522 int *tz)
2523{
2524 union un_fmt_comb scan_val;
2525 int scan_type;
2526
2527 char *pstr,
2528 *pfmt,
2529 *tmp;
2530 int err = 1;
2531 unsigned int j;
2532 struct tm tm;
2533
2534 pfmt = fmt;
2535 pstr = *str;
2536
2537 while (*pfmt)
2538 {
2539 err = 0;
2540 while (*pfmt == ' ')
2541 pfmt++;
2542 while (*pstr == ' ')
2543 pstr++;
2544 if (*pfmt != '%')
2545 {
2546 if (*pfmt == *pstr)
2547 {
2548 pfmt++;
2549 pstr++;
2550 }
2551 else
2552 {
2553 /* Error: no match */
2554 err = 1;
2555 return err;
2556 }
2557 continue;
2558 }
2559 /* here *pfmt equals '%' */
2560 pfmt++;
2561 switch (*pfmt)
2562 {
2563 case 'a':
2564 pfmt++;
2565
2566 /*
2567 * we parse the day and see if it is a week day but we do not
2568 * check if the week day really matches the date
2569 */
2570 err = 1;
2571 j = 0;
2572 while (pgtypes_date_weekdays_short[j])
2573 {
2574 if (strncmp(pgtypes_date_weekdays_short[j], pstr,
2575 strlen(pgtypes_date_weekdays_short[j])) == 0)
2576 {
2577 /* found it */
2578 err = 0;
2579 pstr += strlen(pgtypes_date_weekdays_short[j]);
2580 break;
2581 }
2582 j++;
2583 }
2584 break;
2585 case 'A':
2586 /* see note above */
2587 pfmt++;
2588 err = 1;
2589 j = 0;
2590 while (days[j])
2591 {
2592 if (strncmp(days[j], pstr, strlen(days[j])) == 0)
2593 {
2594 /* found it */
2595 err = 0;
2596 pstr += strlen(days[j]);
2597 break;
2598 }
2599 j++;
2600 }
2601 break;
2602 case 'b':
2603 case 'h':
2604 pfmt++;
2605 err = 1;
2606 j = 0;
2607 while (months[j])
2608 {
2609 if (strncmp(months[j], pstr, strlen(months[j])) == 0)
2610 {
2611 /* found it */
2612 err = 0;
2613 pstr += strlen(months[j]);
2614 *month = j + 1;
2615 break;
2616 }
2617 j++;
2618 }
2619 break;
2620 case 'B':
2621 /* see note above */
2622 pfmt++;
2623 err = 1;
2624 j = 0;
2625 while (pgtypes_date_months[j])
2626 {
2627 if (strncmp(pgtypes_date_months[j], pstr, strlen(pgtypes_date_months[j])) == 0)
2628 {
2629 /* found it */
2630 err = 0;
2631 pstr += strlen(pgtypes_date_months[j]);
2632 *month = j + 1;
2633 break;
2634 }
2635 j++;
2636 }
2637 break;
2638 case 'c':
2639 /* XXX */
2640 break;
2641 case 'C':
2642 pfmt++;
2643 scan_type = PGTYPES_TYPE_UINT;
2644 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2645 *year = scan_val.uint_val * 100;
2646 break;
2647 case 'd':
2648 case 'e':
2649 pfmt++;
2650 scan_type = PGTYPES_TYPE_UINT;
2651 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2652 *day = scan_val.uint_val;
2653 break;
2654 case 'D':
2655
2656 /*
2657 * we have to concatenate the strings in order to be able to
2658 * find the end of the substitution
2659 */
2660 pfmt++;
2661 tmp = pgtypes_alloc(strlen("%m/%d/%y") + strlen(pstr) + 1);
2662 strcpy(tmp, "%m/%d/%y");
2663 strcat(tmp, pfmt);
2664 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2665 free(tmp);
2666 return err;
2667 case 'm':
2668 pfmt++;
2669 scan_type = PGTYPES_TYPE_UINT;
2670 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2671 *month = scan_val.uint_val;
2672 break;
2673 case 'y':
2674 case 'g': /* XXX difference to y (ISO) */
2675 pfmt++;
2676 scan_type = PGTYPES_TYPE_UINT;
2677 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2678 if (*year < 0)
2679 {
2680 /* not yet set */
2681 *year = scan_val.uint_val;
2682 }
2683 else
2684 *year += scan_val.uint_val;
2685 if (*year < 100)
2686 *year += 1900;
2687 break;
2688 case 'G':
2689 /* XXX difference to %V (ISO) */
2690 pfmt++;
2691 scan_type = PGTYPES_TYPE_UINT;
2692 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2693 *year = scan_val.uint_val;
2694 break;
2695 case 'H':
2696 case 'I':
2697 case 'k':
2698 case 'l':
2699 pfmt++;
2700 scan_type = PGTYPES_TYPE_UINT;
2701 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2702 *hour += scan_val.uint_val;
2703 break;
2704 case 'j':
2705 pfmt++;
2706 scan_type = PGTYPES_TYPE_UINT;
2707 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2708
2709 /*
2710 * XXX what should we do with that? We could say that it's
2711 * sufficient if we have the year and the day within the year
2712 * to get at least a specific day.
2713 */
2714 break;
2715 case 'M':
2716 pfmt++;
2717 scan_type = PGTYPES_TYPE_UINT;
2718 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2719 *minute = scan_val.uint_val;
2720 break;
2721 case 'n':
2722 pfmt++;
2723 if (*pstr == '\n')
2724 pstr++;
2725 else
2726 err = 1;
2727 break;
2728 case 'p':
2729 err = 1;
2730 pfmt++;
2731 if (strncmp(pstr, "am", 2) == 0)
2732 {
2733 *hour += 0;
2734 err = 0;
2735 pstr += 2;
2736 }
2737 if (strncmp(pstr, "a.m.", 4) == 0)
2738 {
2739 *hour += 0;
2740 err = 0;
2741 pstr += 4;
2742 }
2743 if (strncmp(pstr, "pm", 2) == 0)
2744 {
2745 *hour += 12;
2746 err = 0;
2747 pstr += 2;
2748 }
2749 if (strncmp(pstr, "p.m.", 4) == 0)
2750 {
2751 *hour += 12;
2752 err = 0;
2753 pstr += 4;
2754 }
2755 break;
2756 case 'P':
2757 err = 1;
2758 pfmt++;
2759 if (strncmp(pstr, "AM", 2) == 0)
2760 {
2761 *hour += 0;
2762 err = 0;
2763 pstr += 2;
2764 }
2765 if (strncmp(pstr, "A.M.", 4) == 0)
2766 {
2767 *hour += 0;
2768 err = 0;
2769 pstr += 4;
2770 }
2771 if (strncmp(pstr, "PM", 2) == 0)
2772 {
2773 *hour += 12;
2774 err = 0;
2775 pstr += 2;
2776 }
2777 if (strncmp(pstr, "P.M.", 4) == 0)
2778 {
2779 *hour += 12;
2780 err = 0;
2781 pstr += 4;
2782 }
2783 break;
2784 case 'r':
2785 pfmt++;
2786 tmp = pgtypes_alloc(strlen("%I:%M:%S %p") + strlen(pstr) + 1);
2787 strcpy(tmp, "%I:%M:%S %p");
2788 strcat(tmp, pfmt);
2789 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2790 free(tmp);
2791 return err;
2792 case 'R':
2793 pfmt++;
2794 tmp = pgtypes_alloc(strlen("%H:%M") + strlen(pstr) + 1);
2795 strcpy(tmp, "%H:%M");
2796 strcat(tmp, pfmt);
2797 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2798 free(tmp);
2799 return err;
2800 case 's':
2801 pfmt++;
2802 scan_type = PGTYPES_TYPE_UINT_LONG;
2803 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2804 /* number of seconds in scan_val.luint_val */
2805 {
2806 struct tm *tms;
2807 time_t et = (time_t) scan_val.luint_val;
2808
2809 tms = gmtime(&et);
2810
2811 if (tms)
2812 {
2813 *year = tms->tm_year + 1900;
2814 *month = tms->tm_mon + 1;
2815 *day = tms->tm_mday;
2816 *hour = tms->tm_hour;
2817 *minute = tms->tm_min;
2818 *second = tms->tm_sec;
2819 }
2820 else
2821 err = 1;
2822 }
2823 break;
2824 case 'S':
2825 pfmt++;
2826 scan_type = PGTYPES_TYPE_UINT;
2827 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2828 *second = scan_val.uint_val;
2829 break;
2830 case 't':
2831 pfmt++;
2832 if (*pstr == '\t')
2833 pstr++;
2834 else
2835 err = 1;
2836 break;
2837 case 'T':
2838 pfmt++;
2839 tmp = pgtypes_alloc(strlen("%H:%M:%S") + strlen(pstr) + 1);
2840 strcpy(tmp, "%H:%M:%S");
2841 strcat(tmp, pfmt);
2842 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2843 free(tmp);
2844 return err;
2845 case 'u':
2846 pfmt++;
2847 scan_type = PGTYPES_TYPE_UINT;
2848 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2849 if (scan_val.uint_val < 1 || scan_val.uint_val > 7)
2850 err = 1;
2851 break;
2852 case 'U':
2853 pfmt++;
2854 scan_type = PGTYPES_TYPE_UINT;
2855 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2856 if (scan_val.uint_val > 53)
2857 err = 1;
2858 break;
2859 case 'V':
2860 pfmt++;
2861 scan_type = PGTYPES_TYPE_UINT;
2862 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2863 if (scan_val.uint_val < 1 || scan_val.uint_val > 53)
2864 err = 1;
2865 break;
2866 case 'w':
2867 pfmt++;
2868 scan_type = PGTYPES_TYPE_UINT;
2869 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2870 if (scan_val.uint_val > 6)
2871 err = 1;
2872 break;
2873 case 'W':
2874 pfmt++;
2875 scan_type = PGTYPES_TYPE_UINT;
2876 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2877 if (scan_val.uint_val > 53)
2878 err = 1;
2879 break;
2880 case 'x':
2881 case 'X':
2882 /* XXX */
2883 break;
2884 case 'Y':
2885 pfmt++;
2886 scan_type = PGTYPES_TYPE_UINT;
2887 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2888 *year = scan_val.uint_val;
2889 break;
2890 case 'z':
2891 pfmt++;
2892 scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2893 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2894 if (!err)
2895 {
2896 err = DecodeTimezone(scan_val.str_val, tz);
2897 free(scan_val.str_val);
2898 }
2899 break;
2900 case 'Z':
2901 pfmt++;
2902 scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2903 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2904 if (!err)
2905 {
2906 /*
2907 * XXX use DecodeSpecial instead? Do we need strcasecmp
2908 * here?
2909 */
2910 err = 1;
2911 for (j = 0; j < szdatetktbl; j++)
2912 {
2913 if ((datetktbl[j].type == TZ || datetktbl[j].type == DTZ) &&
2914 pg_strcasecmp(datetktbl[j].token,
2915 scan_val.str_val) == 0)
2916 {
2917 *tz = -datetktbl[j].value;
2918 err = 0;
2919 break;
2920 }
2921 }
2922 free(scan_val.str_val);
2923 }
2924 break;
2925 case '+':
2926 /* XXX */
2927 break;
2928 case '%':
2929 pfmt++;
2930 if (*pstr == '%')
2931 pstr++;
2932 else
2933 err = 1;
2934 break;
2935 default:
2936 err = 1;
2937 }
2938 }
2939 if (!err)
2940 {
2941 if (*second < 0)
2942 *second = 0;
2943 if (*minute < 0)
2944 *minute = 0;
2945 if (*hour < 0)
2946 *hour = 0;
2947 if (*day < 0)
2948 {
2949 err = 1;
2950 *day = 1;
2951 }
2952 if (*month < 0)
2953 {
2954 err = 1;
2955 *month = 1;
2956 }
2957 if (*year < 0)
2958 {
2959 err = 1;
2960 *year = 1970;
2961 }
2962
2963 if (*second > 59)
2964 {
2965 err = 1;
2966 *second = 0;
2967 }
2968 if (*minute > 59)
2969 {
2970 err = 1;
2971 *minute = 0;
2972 }
2973 if (*hour > 24 || /* test for > 24:00:00 */
2974 (*hour == 24 && (*minute > 0 || *second > 0)))
2975 {
2976 err = 1;
2977 *hour = 0;
2978 }
2979 if (*month > MONTHS_PER_YEAR)
2980 {
2981 err = 1;
2982 *month = 1;
2983 }
2984 if (*day > day_tab[isleap(*year)][*month - 1])
2985 {
2986 *day = day_tab[isleap(*year)][*month - 1];
2987 err = 1;
2988 }
2989
2990 tm.tm_sec = *second;
2991 tm.tm_min = *minute;
2992 tm.tm_hour = *hour;
2993 tm.tm_mday = *day;
2994 tm.tm_mon = *month;
2995 tm.tm_year = *year;
2996
2997 tm2timestamp(&tm, 0, tz, d);
2998 }
2999 return err;
3000}
3001
3002/* XXX: 1900 is compiled in as the base for years */
3003