Line data Source code
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 "common/string.h"
10 : #include "dt.h"
11 : #include "pgtypes_timestamp.h"
12 : #include "pgtypeslib_extern.h"
13 :
14 : const int day_tab[2][13] = {
15 : {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0},
16 : {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0}};
17 :
18 : typedef long AbsoluteTime;
19 :
20 : static const datetkn datetktbl[] = {
21 : /* text, token, lexval */
22 : {EARLY, RESERV, DTK_EARLY}, /* "-infinity" reserved for "early time" */
23 : {"acsst", DTZ, 37800}, /* Cent. Australia */
24 : {"acst", DTZ, -14400}, /* Atlantic/Porto Acre */
25 : {"act", TZ, -18000}, /* Atlantic/Porto Acre */
26 : {DA_D, ADBC, AD}, /* "ad" for years >= 0 */
27 : {"adt", DTZ, -10800}, /* Atlantic Daylight Time */
28 : {"aesst", DTZ, 39600}, /* E. Australia */
29 : {"aest", TZ, 36000}, /* Australia Eastern Std Time */
30 : {"aft", TZ, 16200}, /* Kabul */
31 : {"ahst", TZ, -36000}, /* Alaska-Hawaii Std Time */
32 : {"akdt", DTZ, -28800}, /* Alaska Daylight Time */
33 : {"akst", DTZ, -32400}, /* Alaska Standard Time */
34 : {"allballs", RESERV, DTK_ZULU}, /* 00:00:00 */
35 : {"almst", TZ, 25200}, /* Almaty Savings Time */
36 : {"almt", TZ, 21600}, /* Almaty Time */
37 : {"am", AMPM, AM},
38 : {"amst", DTZ, 18000}, /* Armenia Summer Time (Yerevan) */
39 : #if 0
40 : {"amst", DTZ, -10800}, /* Porto Velho */
41 : #endif
42 : {"amt", TZ, 14400}, /* Armenia Time (Yerevan) */
43 : {"anast", DTZ, 46800}, /* Anadyr Summer Time (Russia) */
44 : {"anat", TZ, 43200}, /* Anadyr Time (Russia) */
45 : {"apr", MONTH, 4},
46 : {"april", MONTH, 4},
47 : #if 0
48 : aqtst
49 : aqtt
50 : arst
51 : #endif
52 : {"art", TZ, -10800}, /* Argentina Time */
53 : #if 0
54 : ashst
55 : ast /* Atlantic Standard Time, Arabia Standard
56 : * Time, Acre Standard Time */
57 : #endif
58 : {"ast", TZ, -14400}, /* Atlantic Std Time (Canada) */
59 : {"at", IGNORE_DTF, 0}, /* "at" (throwaway) */
60 : {"aug", MONTH, 8},
61 : {"august", MONTH, 8},
62 : {"awsst", DTZ, 32400}, /* W. Australia */
63 : {"awst", TZ, 28800}, /* W. Australia */
64 : {"awt", DTZ, -10800},
65 : {"azost", DTZ, 0}, /* Azores Summer Time */
66 : {"azot", TZ, -3600}, /* Azores Time */
67 : {"azst", DTZ, 18000}, /* Azerbaijan Summer Time */
68 : {"azt", TZ, 14400}, /* Azerbaijan Time */
69 : {DB_C, ADBC, BC}, /* "bc" for years < 0 */
70 : {"bdst", TZ, 7200}, /* British Double Summer Time */
71 : {"bdt", TZ, 21600}, /* Dacca */
72 : {"bnt", TZ, 28800}, /* Brunei Darussalam Time */
73 : {"bort", TZ, 28800}, /* Borneo Time (Indonesia) */
74 : #if 0
75 : bortst
76 : bost
77 : #endif
78 : {"bot", TZ, -14400}, /* Bolivia Time */
79 : {"bra", TZ, -10800}, /* Brazil Time */
80 : #if 0
81 : brst
82 : brt
83 : #endif
84 : {"bst", DTZ, 3600}, /* British Summer Time */
85 : #if 0
86 : {"bst", TZ, -10800}, /* Brazil Standard Time */
87 : {"bst", DTZ, -39600}, /* Bering Summer Time */
88 : #endif
89 : {"bt", TZ, 10800}, /* Baghdad Time */
90 : {"btt", TZ, 21600}, /* Bhutan Time */
91 : {"cadt", DTZ, 37800}, /* Central Australian DST */
92 : {"cast", TZ, 34200}, /* Central Australian ST */
93 : {"cat", TZ, -36000}, /* Central Alaska Time */
94 : {"cct", TZ, 28800}, /* China Coast Time */
95 : #if 0
96 : {"cct", TZ, 23400}, /* Indian Cocos (Island) Time */
97 : #endif
98 : {"cdt", DTZ, -18000}, /* Central Daylight Time */
99 : {"cest", DTZ, 7200}, /* Central European Dayl.Time */
100 : {"cet", TZ, 3600}, /* Central European Time */
101 : {"cetdst", DTZ, 7200}, /* Central European Dayl.Time */
102 : {"chadt", DTZ, 49500}, /* Chatham Island Daylight Time (13:45) */
103 : {"chast", TZ, 45900}, /* Chatham Island Time (12:45) */
104 : #if 0
105 : ckhst
106 : #endif
107 : {"ckt", TZ, 43200}, /* Cook Islands Time */
108 : {"clst", DTZ, -10800}, /* Chile Summer Time */
109 : {"clt", TZ, -14400}, /* Chile Time */
110 : #if 0
111 : cost
112 : #endif
113 : {"cot", TZ, -18000}, /* Columbia Time */
114 : {"cst", TZ, -21600}, /* Central Standard Time */
115 : #if 0
116 : cvst
117 : #endif
118 : {"cvt", TZ, 25200}, /* Christmas Island Time (Indian Ocean) */
119 : {"cxt", TZ, 25200}, /* Christmas Island Time (Indian Ocean) */
120 : {"d", UNITS, DTK_DAY}, /* "day of month" for ISO input */
121 : {"davt", TZ, 25200}, /* Davis Time (Antarctica) */
122 : {"ddut", TZ, 36000}, /* Dumont-d'Urville Time (Antarctica) */
123 : {"dec", MONTH, 12},
124 : {"december", MONTH, 12},
125 : {"dnt", TZ, 3600}, /* Dansk Normal Tid */
126 : {"dow", UNITS, DTK_DOW}, /* day of week */
127 : {"doy", UNITS, DTK_DOY}, /* day of year */
128 : {"dst", DTZMOD, SECS_PER_HOUR},
129 : #if 0
130 : {"dusst", DTZ, 21600}, /* Dushanbe Summer Time */
131 : #endif
132 : {"easst", DTZ, -18000}, /* Easter Island Summer Time */
133 : {"east", TZ, -21600}, /* Easter Island Time */
134 : {"eat", TZ, 10800}, /* East Africa Time */
135 : #if 0
136 : {"east", DTZ, 14400}, /* Indian Antananarivo Savings Time */
137 : {"eat", TZ, 10800}, /* Indian Antananarivo Time */
138 : {"ect", TZ, -14400}, /* Eastern Caribbean Time */
139 : {"ect", TZ, -18000}, /* Ecuador Time */
140 : #endif
141 : {"edt", DTZ, -14400}, /* Eastern Daylight Time */
142 : {"eest", DTZ, 10800}, /* Eastern Europe Summer Time */
143 : {"eet", TZ, 7200}, /* East. Europe, USSR Zone 1 */
144 : {"eetdst", DTZ, 10800}, /* Eastern Europe Daylight Time */
145 : {"egst", DTZ, 0}, /* East Greenland Summer Time */
146 : {"egt", TZ, -3600}, /* East Greenland Time */
147 : #if 0
148 : ehdt
149 : #endif
150 : {EPOCH, RESERV, DTK_EPOCH}, /* "epoch" reserved for system epoch time */
151 : {"est", TZ, -18000}, /* Eastern Standard Time */
152 : {"feb", MONTH, 2},
153 : {"february", MONTH, 2},
154 : {"fjst", DTZ, -46800}, /* Fiji Summer Time (13 hour offset!) */
155 : {"fjt", TZ, -43200}, /* Fiji Time */
156 : {"fkst", DTZ, -10800}, /* Falkland Islands Summer Time */
157 : {"fkt", TZ, -7200}, /* Falkland Islands Time */
158 : #if 0
159 : fnst
160 : fnt
161 : #endif
162 : {"fri", DOW, 5},
163 : {"friday", DOW, 5},
164 : {"fst", TZ, 3600}, /* French Summer Time */
165 : {"fwt", DTZ, 7200}, /* French Winter Time */
166 : {"galt", TZ, -21600}, /* Galapagos Time */
167 : {"gamt", TZ, -32400}, /* Gambier Time */
168 : {"gest", DTZ, 18000}, /* Georgia Summer Time */
169 : {"get", TZ, 14400}, /* Georgia Time */
170 : {"gft", TZ, -10800}, /* French Guiana Time */
171 : #if 0
172 : ghst
173 : #endif
174 : {"gilt", TZ, 43200}, /* Gilbert Islands Time */
175 : {"gmt", TZ, 0}, /* Greenwich Mean Time */
176 : {"gst", TZ, 36000}, /* Guam Std Time, USSR Zone 9 */
177 : {"gyt", TZ, -14400}, /* Guyana Time */
178 : {"h", UNITS, DTK_HOUR}, /* "hour" */
179 : #if 0
180 : hadt
181 : hast
182 : #endif
183 : {"hdt", DTZ, -32400}, /* Hawaii/Alaska Daylight Time */
184 : #if 0
185 : hkst
186 : #endif
187 : {"hkt", TZ, 28800}, /* Hong Kong Time */
188 : #if 0
189 : {"hmt", TZ, 10800}, /* Hellas ? ? */
190 : hovst
191 : hovt
192 : #endif
193 : {"hst", TZ, -36000}, /* Hawaii Std Time */
194 : #if 0
195 : hwt
196 : #endif
197 : {"ict", TZ, 25200}, /* Indochina Time */
198 : {"idle", TZ, 43200}, /* Intl. Date Line, East */
199 : {"idlw", TZ, -43200}, /* Intl. Date Line, West */
200 : #if 0
201 : idt /* Israeli, Iran, Indian Daylight Time */
202 : #endif
203 : {LATE, RESERV, DTK_LATE}, /* "infinity" reserved for "late time" */
204 : {"iot", TZ, 18000}, /* Indian Chagos Time */
205 : {"irkst", DTZ, 32400}, /* Irkutsk Summer Time */
206 : {"irkt", TZ, 28800}, /* Irkutsk Time */
207 : {"irt", TZ, 12600}, /* Iran Time */
208 : {"isodow", UNITS, DTK_ISODOW}, /* ISO day of week, Sunday == 7 */
209 : #if 0
210 : isst
211 : #endif
212 : {"ist", TZ, 7200}, /* Israel */
213 : {"it", TZ, 12600}, /* Iran Time */
214 : {"j", UNITS, DTK_JULIAN},
215 : {"jan", MONTH, 1},
216 : {"january", MONTH, 1},
217 : {"javt", TZ, 25200}, /* Java Time (07:00? see JT) */
218 : {"jayt", TZ, 32400}, /* Jayapura Time (Indonesia) */
219 : {"jd", UNITS, DTK_JULIAN},
220 : {"jst", TZ, 32400}, /* Japan Std Time,USSR Zone 8 */
221 : {"jt", TZ, 27000}, /* Java Time (07:30? see JAVT) */
222 : {"jul", MONTH, 7},
223 : {"julian", UNITS, DTK_JULIAN},
224 : {"july", MONTH, 7},
225 : {"jun", MONTH, 6},
226 : {"june", MONTH, 6},
227 : {"kdt", DTZ, 36000}, /* Korea Daylight Time */
228 : {"kgst", DTZ, 21600}, /* Kyrgyzstan Summer Time */
229 : {"kgt", TZ, 18000}, /* Kyrgyzstan Time */
230 : {"kost", TZ, 43200}, /* Kosrae Time */
231 : {"krast", DTZ, 25200}, /* Krasnoyarsk Summer Time */
232 : {"krat", TZ, 28800}, /* Krasnoyarsk Standard Time */
233 : {"kst", TZ, 32400}, /* Korea Standard Time */
234 : {"lhdt", DTZ, 39600}, /* Lord Howe Daylight Time, Australia */
235 : {"lhst", TZ, 37800}, /* Lord Howe Standard Time, Australia */
236 : {"ligt", TZ, 36000}, /* From Melbourne, Australia */
237 : {"lint", TZ, 50400}, /* Line Islands Time (Kiribati; +14 hours!) */
238 : {"lkt", TZ, 21600}, /* Lanka Time */
239 : {"m", UNITS, DTK_MONTH}, /* "month" for ISO input */
240 : {"magst", DTZ, 43200}, /* Magadan Summer Time */
241 : {"magt", TZ, 39600}, /* Magadan Time */
242 : {"mar", MONTH, 3},
243 : {"march", MONTH, 3},
244 : {"mart", TZ, -34200}, /* Marquesas Time */
245 : {"mawt", TZ, 21600}, /* Mawson, Antarctica */
246 : {"may", MONTH, 5},
247 : {"mdt", DTZ, -21600}, /* Mountain Daylight Time */
248 : {"mest", DTZ, 7200}, /* Middle Europe Summer Time */
249 : {"met", TZ, 3600}, /* Middle Europe Time */
250 : {"metdst", DTZ, 7200}, /* Middle Europe Daylight Time */
251 : {"mewt", TZ, 3600}, /* Middle Europe Winter Time */
252 : {"mez", TZ, 3600}, /* Middle Europe Zone */
253 : {"mht", TZ, 43200}, /* Kwajalein */
254 : {"mm", UNITS, DTK_MINUTE}, /* "minute" for ISO input */
255 : {"mmt", TZ, 23400}, /* Myannar Time */
256 : {"mon", DOW, 1},
257 : {"monday", DOW, 1},
258 : #if 0
259 : most
260 : #endif
261 : {"mpt", TZ, 36000}, /* North Mariana Islands Time */
262 : {"msd", DTZ, 14400}, /* Moscow Summer Time */
263 : {"msk", TZ, 10800}, /* Moscow Time */
264 : {"mst", TZ, -25200}, /* Mountain Standard Time */
265 : {"mt", TZ, 30600}, /* Moluccas Time */
266 : {"mut", TZ, 14400}, /* Mauritius Island Time */
267 : {"mvt", TZ, 18000}, /* Maldives Island Time */
268 : {"myt", TZ, 28800}, /* Malaysia Time */
269 : #if 0
270 : ncst
271 : #endif
272 : {"nct", TZ, 39600}, /* New Caledonia Time */
273 : {"ndt", DTZ, -9000}, /* Nfld. Daylight Time */
274 : {"nft", TZ, -12600}, /* Newfoundland Standard Time */
275 : {"nor", TZ, 3600}, /* Norway Standard Time */
276 : {"nov", MONTH, 11},
277 : {"november", MONTH, 11},
278 : {"novst", DTZ, 25200}, /* Novosibirsk Summer Time */
279 : {"novt", TZ, 21600}, /* Novosibirsk Standard Time */
280 : {NOW, RESERV, DTK_NOW}, /* current transaction time */
281 : {"npt", TZ, 20700}, /* Nepal Standard Time (GMT-5:45) */
282 : {"nst", TZ, -12600}, /* Nfld. Standard Time */
283 : {"nt", TZ, -39600}, /* Nome Time */
284 : {"nut", TZ, -39600}, /* Niue Time */
285 : {"nzdt", DTZ, 46800}, /* New Zealand Daylight Time */
286 : {"nzst", TZ, 43200}, /* New Zealand Standard Time */
287 : {"nzt", TZ, 43200}, /* New Zealand Time */
288 : {"oct", MONTH, 10},
289 : {"october", MONTH, 10},
290 : {"omsst", DTZ, 25200}, /* Omsk Summer Time */
291 : {"omst", TZ, 21600}, /* Omsk Time */
292 : {"on", IGNORE_DTF, 0}, /* "on" (throwaway) */
293 : {"pdt", DTZ, -25200}, /* Pacific Daylight Time */
294 : #if 0
295 : pest
296 : #endif
297 : {"pet", TZ, -18000}, /* Peru Time */
298 : {"petst", DTZ, 46800}, /* Petropavlovsk-Kamchatski Summer Time */
299 : {"pett", TZ, 43200}, /* Petropavlovsk-Kamchatski Time */
300 : {"pgt", TZ, 36000}, /* Papua New Guinea Time */
301 : {"phot", TZ, 46800}, /* Phoenix Islands (Kiribati) Time */
302 : #if 0
303 : phst
304 : #endif
305 : {"pht", TZ, 28800}, /* Philippine Time */
306 : {"pkt", TZ, 18000}, /* Pakistan Time */
307 : {"pm", AMPM, PM},
308 : {"pmdt", DTZ, -7200}, /* Pierre & Miquelon Daylight Time */
309 : #if 0
310 : pmst
311 : #endif
312 : {"pont", TZ, 39600}, /* Ponape Time (Micronesia) */
313 : {"pst", TZ, -28800}, /* Pacific Standard Time */
314 : {"pwt", TZ, 32400}, /* Palau Time */
315 : {"pyst", DTZ, -10800}, /* Paraguay Summer Time */
316 : {"pyt", TZ, -14400}, /* Paraguay Time */
317 : {"ret", DTZ, 14400}, /* Reunion Island Time */
318 : {"s", UNITS, DTK_SECOND}, /* "seconds" for ISO input */
319 : {"sadt", DTZ, 37800}, /* S. Australian Dayl. Time */
320 : #if 0
321 : samst
322 : samt
323 : #endif
324 : {"sast", TZ, 34200}, /* South Australian Std Time */
325 : {"sat", DOW, 6},
326 : {"saturday", DOW, 6},
327 : #if 0
328 : sbt
329 : #endif
330 : {"sct", DTZ, 14400}, /* Mahe Island Time */
331 : {"sep", MONTH, 9},
332 : {"sept", MONTH, 9},
333 : {"september", MONTH, 9},
334 : {"set", TZ, -3600}, /* Seychelles Time ?? */
335 : #if 0
336 : sgt
337 : #endif
338 : {"sst", DTZ, 7200}, /* Swedish Summer Time */
339 : {"sun", DOW, 0},
340 : {"sunday", DOW, 0},
341 : {"swt", TZ, 3600}, /* Swedish Winter Time */
342 : #if 0
343 : syot
344 : #endif
345 : {"t", ISOTIME, DTK_TIME}, /* Filler for ISO time fields */
346 : {"tft", TZ, 18000}, /* Kerguelen Time */
347 : {"that", TZ, -36000}, /* Tahiti Time */
348 : {"thu", DOW, 4},
349 : {"thur", DOW, 4},
350 : {"thurs", DOW, 4},
351 : {"thursday", DOW, 4},
352 : {"tjt", TZ, 18000}, /* Tajikistan Time */
353 : {"tkt", TZ, -36000}, /* Tokelau Time */
354 : {"tmt", TZ, 18000}, /* Turkmenistan Time */
355 : {TODAY, RESERV, DTK_TODAY}, /* midnight */
356 : {TOMORROW, RESERV, DTK_TOMORROW}, /* tomorrow midnight */
357 : #if 0
358 : tost
359 : #endif
360 : {"tot", TZ, 46800}, /* Tonga Time */
361 : #if 0
362 : tpt
363 : #endif
364 : {"truk", TZ, 36000}, /* Truk Time */
365 : {"tue", DOW, 2},
366 : {"tues", DOW, 2},
367 : {"tuesday", DOW, 2},
368 : {"tvt", TZ, 43200}, /* Tuvalu Time */
369 : #if 0
370 : uct
371 : #endif
372 : {"ulast", DTZ, 32400}, /* Ulan Bator Summer Time */
373 : {"ulat", TZ, 28800}, /* Ulan Bator Time */
374 : {"ut", TZ, 0},
375 : {"utc", TZ, 0},
376 : {"uyst", DTZ, -7200}, /* Uruguay Summer Time */
377 : {"uyt", TZ, -10800}, /* Uruguay Time */
378 : {"uzst", DTZ, 21600}, /* Uzbekistan Summer Time */
379 : {"uzt", TZ, 18000}, /* Uzbekistan Time */
380 : {"vet", TZ, -14400}, /* Venezuela Time */
381 : {"vlast", DTZ, 39600}, /* Vladivostok Summer Time */
382 : {"vlat", TZ, 36000}, /* Vladivostok Time */
383 : #if 0
384 : vust
385 : #endif
386 : {"vut", TZ, 39600}, /* Vanuata Time */
387 : {"wadt", DTZ, 28800}, /* West Australian DST */
388 : {"wakt", TZ, 43200}, /* Wake Time */
389 : #if 0
390 : warst
391 : #endif
392 : {"wast", TZ, 25200}, /* West Australian Std Time */
393 : {"wat", TZ, -3600}, /* West Africa Time */
394 : {"wdt", DTZ, 32400}, /* West Australian DST */
395 : {"wed", DOW, 3},
396 : {"wednesday", DOW, 3},
397 : {"weds", DOW, 3},
398 : {"west", DTZ, 3600}, /* Western Europe Summer Time */
399 : {"wet", TZ, 0}, /* Western Europe */
400 : {"wetdst", DTZ, 3600}, /* Western Europe Daylight Savings Time */
401 : {"wft", TZ, 43200}, /* Wallis and Futuna Time */
402 : {"wgst", DTZ, -7200}, /* West Greenland Summer Time */
403 : {"wgt", TZ, -10800}, /* West Greenland Time */
404 : {"wst", TZ, 28800}, /* West Australian Standard Time */
405 : {"y", UNITS, DTK_YEAR}, /* "year" for ISO input */
406 : {"yakst", DTZ, 36000}, /* Yakutsk Summer Time */
407 : {"yakt", TZ, 32400}, /* Yakutsk Time */
408 : {"yapt", TZ, 36000}, /* Yap Time (Micronesia) */
409 : {"ydt", DTZ, -28800}, /* Yukon Daylight Time */
410 : {"yekst", DTZ, 21600}, /* Yekaterinburg Summer Time */
411 : {"yekt", TZ, 18000}, /* Yekaterinburg Time */
412 : {YESTERDAY, RESERV, DTK_YESTERDAY}, /* yesterday midnight */
413 : {"yst", TZ, -32400}, /* Yukon Standard Time */
414 : {"z", TZ, 0}, /* time zone tag per ISO-8601 */
415 : {"zp4", TZ, -14400}, /* UTC +4 hours. */
416 : {"zp5", TZ, -18000}, /* UTC +5 hours. */
417 : {"zp6", TZ, -21600}, /* UTC +6 hours. */
418 : {ZULU, TZ, 0}, /* UTC */
419 : };
420 :
421 : static const datetkn deltatktbl[] = {
422 : /* text, token, lexval */
423 : {"@", IGNORE_DTF, 0}, /* postgres relative prefix */
424 : {DAGO, AGO, 0}, /* "ago" indicates negative time offset */
425 : {"c", UNITS, DTK_CENTURY}, /* "century" relative */
426 : {"cent", UNITS, DTK_CENTURY}, /* "century" relative */
427 : {"centuries", UNITS, DTK_CENTURY}, /* "centuries" relative */
428 : {DCENTURY, UNITS, DTK_CENTURY}, /* "century" relative */
429 : {"d", UNITS, DTK_DAY}, /* "day" relative */
430 : {DDAY, UNITS, DTK_DAY}, /* "day" relative */
431 : {"days", UNITS, DTK_DAY}, /* "days" relative */
432 : {"dec", UNITS, DTK_DECADE}, /* "decade" relative */
433 : {DDECADE, UNITS, DTK_DECADE}, /* "decade" relative */
434 : {"decades", UNITS, DTK_DECADE}, /* "decades" relative */
435 : {"decs", UNITS, DTK_DECADE}, /* "decades" relative */
436 : {"h", UNITS, DTK_HOUR}, /* "hour" relative */
437 : {DHOUR, UNITS, DTK_HOUR}, /* "hour" relative */
438 : {"hours", UNITS, DTK_HOUR}, /* "hours" relative */
439 : {"hr", UNITS, DTK_HOUR}, /* "hour" relative */
440 : {"hrs", UNITS, DTK_HOUR}, /* "hours" relative */
441 : {"m", UNITS, DTK_MINUTE}, /* "minute" relative */
442 : {"microsecon", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
443 : {"mil", UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
444 : {"millennia", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
445 : {DMILLENNIUM, UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
446 : {"millisecon", UNITS, DTK_MILLISEC}, /* relative */
447 : {"mils", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
448 : {"min", UNITS, DTK_MINUTE}, /* "minute" relative */
449 : {"mins", UNITS, DTK_MINUTE}, /* "minutes" relative */
450 : {DMINUTE, UNITS, DTK_MINUTE}, /* "minute" relative */
451 : {"minutes", UNITS, DTK_MINUTE}, /* "minutes" relative */
452 : {"mon", UNITS, DTK_MONTH}, /* "months" relative */
453 : {"mons", UNITS, DTK_MONTH}, /* "months" relative */
454 : {DMONTH, UNITS, DTK_MONTH}, /* "month" relative */
455 : {"months", UNITS, DTK_MONTH},
456 : {"ms", UNITS, DTK_MILLISEC},
457 : {"msec", UNITS, DTK_MILLISEC},
458 : {DMILLISEC, UNITS, DTK_MILLISEC},
459 : {"mseconds", UNITS, DTK_MILLISEC},
460 : {"msecs", UNITS, DTK_MILLISEC},
461 : {"qtr", UNITS, DTK_QUARTER}, /* "quarter" relative */
462 : {DQUARTER, UNITS, DTK_QUARTER}, /* "quarter" relative */
463 : {"s", UNITS, DTK_SECOND},
464 : {"sec", UNITS, DTK_SECOND},
465 : {DSECOND, UNITS, DTK_SECOND},
466 : {"seconds", UNITS, DTK_SECOND},
467 : {"secs", UNITS, DTK_SECOND},
468 : {DTIMEZONE, UNITS, DTK_TZ}, /* "timezone" time offset */
469 : {"timezone_h", UNITS, DTK_TZ_HOUR}, /* timezone hour units */
470 : {"timezone_m", UNITS, DTK_TZ_MINUTE}, /* timezone minutes units */
471 : {"us", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
472 : {"usec", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
473 : {DMICROSEC, UNITS, DTK_MICROSEC}, /* "microsecond" relative */
474 : {"useconds", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
475 : {"usecs", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
476 : {"w", UNITS, DTK_WEEK}, /* "week" relative */
477 : {DWEEK, UNITS, DTK_WEEK}, /* "week" relative */
478 : {"weeks", UNITS, DTK_WEEK}, /* "weeks" relative */
479 : {"y", UNITS, DTK_YEAR}, /* "year" relative */
480 : {DYEAR, UNITS, DTK_YEAR}, /* "year" relative */
481 : {"years", UNITS, DTK_YEAR}, /* "years" relative */
482 : {"yr", UNITS, DTK_YEAR}, /* "year" relative */
483 : {"yrs", UNITS, DTK_YEAR}, /* "years" relative */
484 : };
485 :
486 : static const unsigned int szdatetktbl = lengthof(datetktbl);
487 : static const unsigned int szdeltatktbl = lengthof(deltatktbl);
488 :
489 : static const datetkn *datecache[MAXDATEFIELDS] = {NULL};
490 :
491 : static const datetkn *deltacache[MAXDATEFIELDS] = {NULL};
492 :
493 : char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL};
494 :
495 : char *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", NULL};
496 :
497 : char *pgtypes_date_weekdays_short[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL};
498 :
499 : char *pgtypes_date_months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", NULL};
500 :
501 : static const datetkn *
502 90 : datebsearch(const char *key, const datetkn *base, unsigned int nel)
503 : {
504 90 : if (nel > 0)
505 : {
506 90 : const datetkn *last = base + nel - 1,
507 : *position;
508 : int result;
509 :
510 586 : while (last >= base)
511 : {
512 576 : position = base + ((last - base) >> 1);
513 : /* precheck the first character for a bit of extra speed */
514 576 : result = (int) key[0] - (int) position->token[0];
515 576 : if (result == 0)
516 : {
517 : /* use strncmp so that we match truncated tokens */
518 282 : result = strncmp(key, position->token, TOKMAXLEN);
519 282 : if (result == 0)
520 80 : return position;
521 : }
522 496 : if (result < 0)
523 232 : last = position - 1;
524 : else
525 264 : base = position + 1;
526 : }
527 : }
528 10 : return NULL;
529 : }
530 :
531 : /*
532 : * DecodeUnits()
533 : * Decode text string using lookup table.
534 : * This routine supports time interval decoding.
535 : */
536 : int
537 88 : DecodeUnits(int field, char *lowtoken, int *val)
538 : {
539 : int type;
540 : const datetkn *tp;
541 :
542 : /* use strncmp so that we match truncated tokens */
543 88 : if (deltacache[field] != NULL &&
544 60 : strncmp(lowtoken, deltacache[field]->token, TOKMAXLEN) == 0)
545 40 : tp = deltacache[field];
546 : else
547 48 : tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
548 88 : deltacache[field] = tp;
549 88 : if (tp == NULL)
550 : {
551 2 : type = UNKNOWN_FIELD;
552 2 : *val = 0;
553 : }
554 : else
555 : {
556 86 : type = tp->type;
557 86 : *val = tp->value;
558 : }
559 :
560 88 : return type;
561 : } /* DecodeUnits() */
562 :
563 : /*
564 : * Calendar time to Julian date conversions.
565 : * Julian date is commonly used in astronomical applications,
566 : * since it is numerically accurate and computationally simple.
567 : * The algorithms here will accurately convert between Julian day
568 : * and calendar date for all non-negative Julian days
569 : * (i.e. from Nov 24, -4713 on).
570 : *
571 : * These routines will be used by other date/time packages
572 : * - thomas 97/02/25
573 : *
574 : * Rewritten to eliminate overflow problems. This now allows the
575 : * routines to work correctly for all Julian day counts from
576 : * 0 to 2147483647 (Nov 24, -4713 to Jun 3, 5874898) assuming
577 : * a 32-bit integer. Longer types should also work to the limits
578 : * of their precision.
579 : */
580 :
581 : int
582 1826 : date2j(int y, int m, int d)
583 : {
584 : int julian;
585 : int century;
586 :
587 1826 : if (m > 2)
588 : {
589 104 : m += 1;
590 104 : y += 4800;
591 : }
592 : else
593 : {
594 1722 : m += 13;
595 1722 : y += 4799;
596 : }
597 :
598 1826 : century = y / 100;
599 1826 : julian = y * 365 - 32167;
600 1826 : julian += y / 4 - century + century / 4;
601 1826 : julian += 7834 * m / 256 + d;
602 :
603 1826 : return julian;
604 : } /* date2j() */
605 :
606 : void
607 570 : j2date(int jd, int *year, int *month, int *day)
608 : {
609 : unsigned int julian;
610 : unsigned int quad;
611 : unsigned int extra;
612 : int y;
613 :
614 570 : julian = jd;
615 570 : julian += 32044;
616 570 : quad = julian / 146097;
617 570 : extra = (julian - quad * 146097) * 4 + 3;
618 570 : julian += 60 + quad * 3 + extra / 146097;
619 570 : quad = julian / 1461;
620 570 : julian -= quad * 1461;
621 570 : y = julian * 4 / 1461;
622 570 : julian = ((y != 0) ? (julian + 305) % 365 : (julian + 306) % 366) + 123;
623 570 : y += quad * 4;
624 570 : *year = y - 4800;
625 570 : quad = julian * 2141 / 65536;
626 570 : *day = julian - 7834 * quad / 256;
627 570 : *month = (quad + 10) % 12 + 1;
628 570 : } /* j2date() */
629 :
630 : /*
631 : * DecodeSpecial()
632 : * Decode text string using lookup table.
633 : * Implement a cache lookup since it is likely that dates
634 : * will be related in format.
635 : */
636 : static int
637 228 : DecodeSpecial(int field, char *lowtoken, int *val)
638 : {
639 : int type;
640 : const datetkn *tp;
641 :
642 : /* use strncmp so that we match truncated tokens */
643 228 : if (datecache[field] != NULL &&
644 198 : strncmp(lowtoken, datecache[field]->token, TOKMAXLEN) == 0)
645 186 : tp = datecache[field];
646 : else
647 : {
648 42 : tp = NULL;
649 42 : if (!tp)
650 42 : tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
651 : }
652 228 : datecache[field] = tp;
653 228 : if (tp == NULL)
654 : {
655 8 : type = UNKNOWN_FIELD;
656 8 : *val = 0;
657 : }
658 : else
659 : {
660 220 : type = tp->type;
661 220 : *val = tp->value;
662 : }
663 :
664 228 : return type;
665 : } /* DecodeSpecial() */
666 :
667 : /*
668 : * EncodeDateOnly()
669 : * Encode date as local time.
670 : */
671 : void
672 190 : EncodeDateOnly(struct tm *tm, int style, char *str, bool EuroDates)
673 : {
674 : Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
675 :
676 190 : switch (style)
677 : {
678 190 : case USE_ISO_DATES:
679 : /* compatible with ISO date formats */
680 190 : if (tm->tm_year > 0)
681 188 : sprintf(str, "%04d-%02d-%02d",
682 : tm->tm_year, tm->tm_mon, tm->tm_mday);
683 : else
684 2 : sprintf(str, "%04d-%02d-%02d %s",
685 2 : -(tm->tm_year - 1), tm->tm_mon, tm->tm_mday, "BC");
686 190 : break;
687 :
688 0 : case USE_SQL_DATES:
689 : /* compatible with Oracle/Ingres date formats */
690 0 : if (EuroDates)
691 0 : sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
692 : else
693 0 : sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
694 0 : if (tm->tm_year > 0)
695 0 : sprintf(str + 5, "/%04d", tm->tm_year);
696 : else
697 0 : sprintf(str + 5, "/%04d %s", -(tm->tm_year - 1), "BC");
698 0 : break;
699 :
700 0 : case USE_GERMAN_DATES:
701 : /* German-style date format */
702 0 : sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
703 0 : if (tm->tm_year > 0)
704 0 : sprintf(str + 5, ".%04d", tm->tm_year);
705 : else
706 0 : sprintf(str + 5, ".%04d %s", -(tm->tm_year - 1), "BC");
707 0 : break;
708 :
709 0 : case USE_POSTGRES_DATES:
710 : default:
711 : /* traditional date-only style for Postgres */
712 0 : if (EuroDates)
713 0 : sprintf(str, "%02d-%02d", tm->tm_mday, tm->tm_mon);
714 : else
715 0 : sprintf(str, "%02d-%02d", tm->tm_mon, tm->tm_mday);
716 0 : if (tm->tm_year > 0)
717 0 : sprintf(str + 5, "-%04d", tm->tm_year);
718 : else
719 0 : sprintf(str + 5, "-%04d %s", -(tm->tm_year - 1), "BC");
720 0 : break;
721 : }
722 190 : }
723 :
724 : void
725 68 : TrimTrailingZeros(char *str)
726 : {
727 68 : int len = strlen(str);
728 :
729 : /* chop off trailing zeros... but leave at least 2 fractional digits */
730 170 : while (*(str + len - 1) == '0' && *(str + len - 3) != '.')
731 : {
732 102 : len--;
733 102 : *(str + len) = '\0';
734 : }
735 68 : }
736 :
737 : /*
738 : * EncodeDateTime()
739 : * Encode date and time interpreted as local time.
740 : *
741 : * tm and fsec are the value to encode, print_tz determines whether to include
742 : * a time zone (the difference between timestamp and timestamptz types), tz is
743 : * the numeric time zone offset, tzn is the textual time zone, which if
744 : * specified will be used instead of tz by some styles, style is the date
745 : * style, str is where to write the output.
746 : *
747 : * Supported date styles:
748 : * Postgres - day mon hh:mm:ss yyyy tz
749 : * SQL - mm/dd/yyyy hh:mm:ss.ss tz
750 : * ISO - yyyy-mm-dd hh:mm:ss+/-tz
751 : * German - dd.mm.yyyy hh:mm:ss tz
752 : * Variants (affects order of month and day for Postgres and SQL styles):
753 : * US - mm/dd/yyyy
754 : * European - dd/mm/yyyy
755 : */
756 : void
757 318 : EncodeDateTime(struct tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str, bool EuroDates)
758 : {
759 : int day,
760 : hour,
761 : min;
762 :
763 : /*
764 : * Negative tm_isdst means we have no valid time zone translation.
765 : */
766 318 : if (tm->tm_isdst < 0)
767 318 : print_tz = false;
768 :
769 318 : switch (style)
770 : {
771 318 : case USE_ISO_DATES:
772 : /* Compatible with ISO-8601 date formats */
773 :
774 318 : sprintf(str, "%04d-%02d-%02d %02d:%02d",
775 318 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
776 : tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min);
777 :
778 : /*
779 : * Print fractional seconds if any. The field widths here should
780 : * be at least equal to MAX_TIMESTAMP_PRECISION.
781 : */
782 318 : if (fsec != 0)
783 : {
784 68 : sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
785 68 : TrimTrailingZeros(str);
786 : }
787 : else
788 250 : sprintf(str + strlen(str), ":%02d", tm->tm_sec);
789 :
790 318 : if (tm->tm_year <= 0)
791 10 : sprintf(str + strlen(str), " BC");
792 :
793 318 : if (print_tz)
794 : {
795 0 : hour = -(tz / SECS_PER_HOUR);
796 0 : min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
797 0 : if (min != 0)
798 0 : sprintf(str + strlen(str), "%+03d:%02d", hour, min);
799 : else
800 0 : sprintf(str + strlen(str), "%+03d", hour);
801 : }
802 318 : break;
803 :
804 0 : case USE_SQL_DATES:
805 : /* Compatible with Oracle/Ingres date formats */
806 :
807 0 : if (EuroDates)
808 0 : sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
809 : else
810 0 : sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
811 :
812 0 : sprintf(str + 5, "/%04d %02d:%02d",
813 0 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
814 : tm->tm_hour, tm->tm_min);
815 :
816 : /*
817 : * Print fractional seconds if any. The field widths here should
818 : * be at least equal to MAX_TIMESTAMP_PRECISION.
819 : */
820 0 : if (fsec != 0)
821 : {
822 0 : sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
823 0 : TrimTrailingZeros(str);
824 : }
825 : else
826 0 : sprintf(str + strlen(str), ":%02d", tm->tm_sec);
827 :
828 0 : if (tm->tm_year <= 0)
829 0 : sprintf(str + strlen(str), " BC");
830 :
831 : /*
832 : * Note: the uses of %.*s in this function would be risky if the
833 : * timezone names ever contain non-ASCII characters, since we are
834 : * not being careful to do encoding-aware clipping. However, all
835 : * TZ abbreviations in the IANA database are plain ASCII.
836 : */
837 :
838 0 : if (print_tz)
839 : {
840 0 : if (tzn)
841 0 : sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
842 : else
843 : {
844 0 : hour = -(tz / SECS_PER_HOUR);
845 0 : min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
846 0 : if (min != 0)
847 0 : sprintf(str + strlen(str), "%+03d:%02d", hour, min);
848 : else
849 0 : sprintf(str + strlen(str), "%+03d", hour);
850 : }
851 : }
852 0 : break;
853 :
854 0 : case USE_GERMAN_DATES:
855 : /* German variant on European style */
856 :
857 0 : sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
858 :
859 0 : sprintf(str + 5, ".%04d %02d:%02d",
860 0 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
861 : tm->tm_hour, tm->tm_min);
862 :
863 : /*
864 : * Print fractional seconds if any. The field widths here should
865 : * be at least equal to MAX_TIMESTAMP_PRECISION.
866 : */
867 0 : if (fsec != 0)
868 : {
869 0 : sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
870 0 : TrimTrailingZeros(str);
871 : }
872 : else
873 0 : sprintf(str + strlen(str), ":%02d", tm->tm_sec);
874 :
875 0 : if (tm->tm_year <= 0)
876 0 : sprintf(str + strlen(str), " BC");
877 :
878 0 : if (print_tz)
879 : {
880 0 : if (tzn)
881 0 : sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
882 : else
883 : {
884 0 : hour = -(tz / SECS_PER_HOUR);
885 0 : min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
886 0 : if (min != 0)
887 0 : sprintf(str + strlen(str), "%+03d:%02d", hour, min);
888 : else
889 0 : sprintf(str + strlen(str), "%+03d", hour);
890 : }
891 : }
892 0 : break;
893 :
894 0 : case USE_POSTGRES_DATES:
895 : default:
896 : /* Backward-compatible with traditional Postgres abstime dates */
897 :
898 0 : day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
899 0 : tm->tm_wday = (int) ((day + date2j(2000, 1, 1) + 1) % 7);
900 :
901 0 : memcpy(str, days[tm->tm_wday], 3);
902 0 : strcpy(str + 3, " ");
903 :
904 0 : if (EuroDates)
905 0 : sprintf(str + 4, "%02d %3s", tm->tm_mday, months[tm->tm_mon - 1]);
906 : else
907 0 : sprintf(str + 4, "%3s %02d", months[tm->tm_mon - 1], tm->tm_mday);
908 :
909 0 : sprintf(str + 10, " %02d:%02d", tm->tm_hour, tm->tm_min);
910 :
911 : /*
912 : * Print fractional seconds if any. The field widths here should
913 : * be at least equal to MAX_TIMESTAMP_PRECISION.
914 : */
915 0 : if (fsec != 0)
916 : {
917 0 : sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
918 0 : TrimTrailingZeros(str);
919 : }
920 : else
921 0 : sprintf(str + strlen(str), ":%02d", tm->tm_sec);
922 :
923 0 : sprintf(str + strlen(str), " %04d",
924 0 : (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1));
925 0 : if (tm->tm_year <= 0)
926 0 : sprintf(str + strlen(str), " BC");
927 :
928 0 : if (print_tz)
929 : {
930 0 : if (tzn)
931 0 : sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
932 : else
933 : {
934 : /*
935 : * We have a time zone, but no string version. Use the
936 : * numeric form, but be sure to include a leading space to
937 : * avoid formatting something which would be rejected by
938 : * the date/time parser later. - thomas 2001-10-19
939 : */
940 0 : hour = -(tz / SECS_PER_HOUR);
941 0 : min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
942 0 : if (min != 0)
943 0 : sprintf(str + strlen(str), " %+03d:%02d", hour, min);
944 : else
945 0 : sprintf(str + strlen(str), " %+03d", hour);
946 : }
947 : }
948 0 : break;
949 : }
950 318 : }
951 :
952 : int
953 0 : GetEpochTime(struct tm *tm)
954 : {
955 : struct tm *t0;
956 : struct tm tmbuf;
957 0 : time_t epoch = 0;
958 :
959 0 : t0 = gmtime_r(&epoch, &tmbuf);
960 :
961 0 : if (t0)
962 : {
963 0 : tm->tm_year = t0->tm_year + 1900;
964 0 : tm->tm_mon = t0->tm_mon + 1;
965 0 : tm->tm_mday = t0->tm_mday;
966 0 : tm->tm_hour = t0->tm_hour;
967 0 : tm->tm_min = t0->tm_min;
968 0 : tm->tm_sec = t0->tm_sec;
969 :
970 0 : return 0;
971 : }
972 :
973 0 : return -1;
974 : } /* GetEpochTime() */
975 :
976 : static void
977 2 : abstime2tm(AbsoluteTime _time, int *tzp, struct tm *tm, char **tzn)
978 : {
979 2 : time_t time = (time_t) _time;
980 : struct tm *tx;
981 : struct tm tmbuf;
982 :
983 2 : errno = 0;
984 2 : if (tzp != NULL)
985 2 : tx = localtime_r(&time, &tmbuf);
986 : else
987 0 : tx = gmtime_r(&time, &tmbuf);
988 :
989 2 : if (!tx)
990 : {
991 0 : errno = PGTYPES_TS_BAD_TIMESTAMP;
992 0 : return;
993 : }
994 :
995 2 : tm->tm_year = tx->tm_year + 1900;
996 2 : tm->tm_mon = tx->tm_mon + 1;
997 2 : tm->tm_mday = tx->tm_mday;
998 2 : tm->tm_hour = tx->tm_hour;
999 2 : tm->tm_min = tx->tm_min;
1000 2 : tm->tm_sec = tx->tm_sec;
1001 2 : tm->tm_isdst = tx->tm_isdst;
1002 :
1003 : #if defined(HAVE_STRUCT_TM_TM_ZONE)
1004 2 : tm->tm_gmtoff = tx->tm_gmtoff;
1005 2 : tm->tm_zone = tx->tm_zone;
1006 :
1007 2 : if (tzp != NULL)
1008 : {
1009 : /*
1010 : * We have a brute force time zone per SQL99? Then use it without
1011 : * change since we have already rotated to the time zone.
1012 : */
1013 2 : *tzp = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
1014 :
1015 : /*
1016 : * FreeBSD man pages indicate that this should work - tgl 97/04/23
1017 : */
1018 2 : if (tzn != NULL)
1019 : {
1020 : /*
1021 : * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1022 : * contains an error message, which doesn't fit in the buffer
1023 : */
1024 0 : strlcpy(*tzn, tm->tm_zone, MAXTZLEN + 1);
1025 0 : if (strlen(tm->tm_zone) > MAXTZLEN)
1026 0 : tm->tm_isdst = -1;
1027 : }
1028 : }
1029 : else
1030 0 : tm->tm_isdst = -1;
1031 : #elif defined(HAVE_INT_TIMEZONE)
1032 : if (tzp != NULL)
1033 : {
1034 : *tzp = (tm->tm_isdst > 0) ? TIMEZONE_GLOBAL - SECS_PER_HOUR : TIMEZONE_GLOBAL;
1035 :
1036 : if (tzn != NULL)
1037 : {
1038 : /*
1039 : * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1040 : * contains an error message, which doesn't fit in the buffer
1041 : */
1042 : strlcpy(*tzn, TZNAME_GLOBAL[tm->tm_isdst], MAXTZLEN + 1);
1043 : if (strlen(TZNAME_GLOBAL[tm->tm_isdst]) > MAXTZLEN)
1044 : tm->tm_isdst = -1;
1045 : }
1046 : }
1047 : else
1048 : tm->tm_isdst = -1;
1049 : #else /* not (HAVE_STRUCT_TM_TM_ZONE ||
1050 : * HAVE_INT_TIMEZONE) */
1051 : if (tzp != NULL)
1052 : {
1053 : /* default to UTC */
1054 : *tzp = 0;
1055 : if (tzn != NULL)
1056 : *tzn = NULL;
1057 : }
1058 : else
1059 : tm->tm_isdst = -1;
1060 : #endif
1061 : }
1062 :
1063 : void
1064 2 : GetCurrentDateTime(struct tm *tm)
1065 : {
1066 : int tz;
1067 :
1068 2 : abstime2tm(time(NULL), &tz, tm, NULL);
1069 2 : }
1070 :
1071 : void
1072 328 : dt2time(double jd, int *hour, int *min, int *sec, fsec_t *fsec)
1073 : {
1074 : int64 time;
1075 :
1076 328 : time = jd;
1077 328 : *hour = time / USECS_PER_HOUR;
1078 328 : time -= (*hour) * USECS_PER_HOUR;
1079 328 : *min = time / USECS_PER_MINUTE;
1080 328 : time -= (*min) * USECS_PER_MINUTE;
1081 328 : *sec = time / USECS_PER_SEC;
1082 328 : *fsec = time - (*sec * USECS_PER_SEC);
1083 328 : } /* dt2time() */
1084 :
1085 :
1086 :
1087 : /*
1088 : * DecodeNumberField()
1089 : * Interpret numeric string as a concatenated date or time field.
1090 : * Use the context of previously decoded fields to help with
1091 : * the interpretation.
1092 : */
1093 : static int
1094 30 : DecodeNumberField(int len, char *str, int fmask,
1095 : int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits)
1096 : {
1097 : char *cp;
1098 :
1099 : /*
1100 : * Have a decimal point? Then this is a date or something with a seconds
1101 : * field...
1102 : */
1103 30 : if ((cp = strchr(str, '.')) != NULL)
1104 : {
1105 : char fstr[7];
1106 : int i;
1107 :
1108 0 : cp++;
1109 :
1110 : /*
1111 : * OK, we have at most six digits to care about. Let's construct a
1112 : * string with those digits, zero-padded on the right, and then do the
1113 : * conversion to an integer.
1114 : *
1115 : * XXX This truncates the seventh digit, unlike rounding it as the
1116 : * backend does.
1117 : */
1118 0 : for (i = 0; i < 6; i++)
1119 0 : fstr[i] = *cp != '\0' ? *cp++ : '0';
1120 0 : fstr[i] = '\0';
1121 0 : *fsec = strtoint(fstr, NULL, 10);
1122 0 : *cp = '\0';
1123 0 : len = strlen(str);
1124 : }
1125 : /* No decimal point and no complete date yet? */
1126 30 : else if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1127 : {
1128 : /* yyyymmdd? */
1129 30 : if (len == 8)
1130 : {
1131 18 : *tmask = DTK_DATE_M;
1132 :
1133 18 : tm->tm_mday = atoi(str + 6);
1134 18 : *(str + 6) = '\0';
1135 18 : tm->tm_mon = atoi(str + 4);
1136 18 : *(str + 4) = '\0';
1137 18 : tm->tm_year = atoi(str + 0);
1138 :
1139 18 : return DTK_DATE;
1140 : }
1141 : /* yymmdd? */
1142 12 : else if (len == 6)
1143 : {
1144 12 : *tmask = DTK_DATE_M;
1145 12 : tm->tm_mday = atoi(str + 4);
1146 12 : *(str + 4) = '\0';
1147 12 : tm->tm_mon = atoi(str + 2);
1148 12 : *(str + 2) = '\0';
1149 12 : tm->tm_year = atoi(str + 0);
1150 12 : *is2digits = true;
1151 :
1152 12 : return DTK_DATE;
1153 : }
1154 : /* yyddd? */
1155 0 : else if (len == 5)
1156 : {
1157 0 : *tmask = DTK_DATE_M;
1158 0 : tm->tm_mday = atoi(str + 2);
1159 0 : *(str + 2) = '\0';
1160 0 : tm->tm_mon = 1;
1161 0 : tm->tm_year = atoi(str + 0);
1162 0 : *is2digits = true;
1163 :
1164 0 : return DTK_DATE;
1165 : }
1166 : }
1167 :
1168 : /* not all time fields are specified? */
1169 0 : if ((fmask & DTK_TIME_M) != DTK_TIME_M)
1170 : {
1171 : /* hhmmss */
1172 0 : if (len == 6)
1173 : {
1174 0 : *tmask = DTK_TIME_M;
1175 0 : tm->tm_sec = atoi(str + 4);
1176 0 : *(str + 4) = '\0';
1177 0 : tm->tm_min = atoi(str + 2);
1178 0 : *(str + 2) = '\0';
1179 0 : tm->tm_hour = atoi(str + 0);
1180 :
1181 0 : return DTK_TIME;
1182 : }
1183 : /* hhmm? */
1184 0 : else if (len == 4)
1185 : {
1186 0 : *tmask = DTK_TIME_M;
1187 0 : tm->tm_sec = 0;
1188 0 : tm->tm_min = atoi(str + 2);
1189 0 : *(str + 2) = '\0';
1190 0 : tm->tm_hour = atoi(str + 0);
1191 :
1192 0 : return DTK_TIME;
1193 : }
1194 : }
1195 :
1196 0 : return -1;
1197 : } /* DecodeNumberField() */
1198 :
1199 :
1200 : /*
1201 : * DecodeNumber()
1202 : * Interpret plain numeric field as a date value in context.
1203 : */
1204 : static int
1205 796 : DecodeNumber(int flen, char *str, int fmask,
1206 : int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits, bool EuroDates)
1207 : {
1208 : int val;
1209 : char *cp;
1210 :
1211 796 : *tmask = 0;
1212 :
1213 796 : val = strtoint(str, &cp, 10);
1214 796 : if (cp == str)
1215 0 : return -1;
1216 :
1217 796 : if (*cp == '.')
1218 : {
1219 : /*
1220 : * More than two digits? Then could be a date or a run-together time:
1221 : * 2001.360 20011225 040506.789
1222 : */
1223 0 : if (cp - str > 2)
1224 0 : return DecodeNumberField(flen, str, (fmask | DTK_DATE_M),
1225 : tmask, tm, fsec, is2digits);
1226 :
1227 0 : *fsec = strtod(cp, &cp);
1228 0 : if (*cp != '\0')
1229 0 : return -1;
1230 : }
1231 796 : else if (*cp != '\0')
1232 0 : return -1;
1233 :
1234 : /* Special case day of year? */
1235 796 : if (flen == 3 && (fmask & DTK_M(YEAR)) && val >= 1 && val <= 366)
1236 : {
1237 12 : *tmask = (DTK_M(DOY) | DTK_M(MONTH) | DTK_M(DAY));
1238 12 : tm->tm_yday = val;
1239 12 : j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
1240 : &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1241 : }
1242 :
1243 : /***
1244 : * Enough digits to be unequivocal year? Used to test for 4 digits or
1245 : * more, but we now test first for a three-digit doy so anything
1246 : * bigger than two digits had better be an explicit year.
1247 : * - thomas 1999-01-09
1248 : * Back to requiring a 4 digit year. We accept a two digit
1249 : * year farther down. - thomas 2000-03-28
1250 : ***/
1251 784 : else if (flen >= 4)
1252 : {
1253 240 : *tmask = DTK_M(YEAR);
1254 :
1255 : /* already have a year? then see if we can substitute... */
1256 240 : if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1257 0 : tm->tm_year >= 1 && tm->tm_year <= 31)
1258 : {
1259 0 : tm->tm_mday = tm->tm_year;
1260 0 : *tmask = DTK_M(DAY);
1261 : }
1262 :
1263 240 : tm->tm_year = val;
1264 : }
1265 :
1266 : /* already have year? then could be month */
1267 544 : else if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1268 : {
1269 112 : *tmask = DTK_M(MONTH);
1270 112 : tm->tm_mon = val;
1271 : }
1272 : /* no year and EuroDates enabled? then could be day */
1273 432 : else if ((EuroDates || (fmask & DTK_M(MONTH))) &&
1274 370 : !(fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1275 174 : val >= 1 && val <= 31)
1276 : {
1277 162 : *tmask = DTK_M(DAY);
1278 162 : tm->tm_mday = val;
1279 : }
1280 270 : else if (!(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1281 : {
1282 60 : *tmask = DTK_M(MONTH);
1283 60 : tm->tm_mon = val;
1284 : }
1285 210 : else if (!(fmask & DTK_M(DAY)) && val >= 1 && val <= 31)
1286 : {
1287 136 : *tmask = DTK_M(DAY);
1288 136 : tm->tm_mday = val;
1289 : }
1290 :
1291 : /*
1292 : * Check for 2 or 4 or more digits, but currently we reach here only if
1293 : * two digits. - thomas 2000-03-28
1294 : */
1295 74 : else if (!(fmask & DTK_M(YEAR)) && (flen >= 4 || flen == 2))
1296 : {
1297 74 : *tmask = DTK_M(YEAR);
1298 74 : tm->tm_year = val;
1299 :
1300 : /* adjust ONLY if exactly two digits... */
1301 74 : *is2digits = (flen == 2);
1302 : }
1303 : else
1304 0 : return -1;
1305 :
1306 796 : return 0;
1307 : } /* DecodeNumber() */
1308 :
1309 : /*
1310 : * DecodeDate()
1311 : * Decode date string which includes delimiters.
1312 : * Insist on a complete set of fields.
1313 : */
1314 : static int
1315 266 : DecodeDate(char *str, int fmask, int *tmask, struct tm *tm, bool EuroDates)
1316 : {
1317 : fsec_t fsec;
1318 :
1319 266 : int nf = 0;
1320 : int i,
1321 : len;
1322 266 : bool bc = false;
1323 266 : bool is2digits = false;
1324 : int type,
1325 : val,
1326 266 : dmask = 0;
1327 : char *field[MAXDATEFIELDS];
1328 :
1329 : /* parse this string... */
1330 1048 : while (*str != '\0' && nf < MAXDATEFIELDS)
1331 : {
1332 : /* skip field separators */
1333 878 : while (!isalnum((unsigned char) *str))
1334 96 : str++;
1335 :
1336 782 : field[nf] = str;
1337 782 : if (isdigit((unsigned char) *str))
1338 : {
1339 2406 : while (isdigit((unsigned char) *str))
1340 1710 : str++;
1341 : }
1342 86 : else if (isalpha((unsigned char) *str))
1343 : {
1344 546 : while (isalpha((unsigned char) *str))
1345 460 : str++;
1346 : }
1347 :
1348 : /* Just get rid of any non-digit, non-alpha characters... */
1349 782 : if (*str != '\0')
1350 516 : *str++ = '\0';
1351 782 : nf++;
1352 : }
1353 :
1354 : #if 0
1355 : /* don't allow too many fields */
1356 : if (nf > 3)
1357 : return -1;
1358 : #endif
1359 :
1360 266 : *tmask = 0;
1361 :
1362 : /* look first for text fields, since that will be unambiguous month */
1363 1046 : for (i = 0; i < nf; i++)
1364 : {
1365 782 : if (isalpha((unsigned char) *field[i]))
1366 : {
1367 86 : type = DecodeSpecial(i, field[i], &val);
1368 86 : if (type == IGNORE_DTF)
1369 0 : continue;
1370 :
1371 86 : dmask = DTK_M(type);
1372 86 : switch (type)
1373 : {
1374 84 : case MONTH:
1375 84 : tm->tm_mon = val;
1376 84 : break;
1377 :
1378 0 : case ADBC:
1379 0 : bc = (val == BC);
1380 0 : break;
1381 :
1382 2 : default:
1383 2 : return -1;
1384 : }
1385 84 : if (fmask & dmask)
1386 0 : return -1;
1387 :
1388 84 : fmask |= dmask;
1389 84 : *tmask |= dmask;
1390 :
1391 : /* mark this field as being completed */
1392 84 : field[i] = NULL;
1393 : }
1394 : }
1395 :
1396 : /* now pick up remaining numeric fields */
1397 1044 : for (i = 0; i < nf; i++)
1398 : {
1399 780 : if (field[i] == NULL)
1400 84 : continue;
1401 :
1402 696 : if ((len = strlen(field[i])) <= 0)
1403 0 : return -1;
1404 :
1405 696 : if (DecodeNumber(len, field[i], fmask, &dmask, tm, &fsec, &is2digits, EuroDates) != 0)
1406 0 : return -1;
1407 :
1408 696 : if (fmask & dmask)
1409 0 : return -1;
1410 :
1411 696 : fmask |= dmask;
1412 696 : *tmask |= dmask;
1413 : }
1414 :
1415 264 : if ((fmask & ~(DTK_M(DOY) | DTK_M(TZ))) != DTK_DATE_M)
1416 0 : return -1;
1417 :
1418 : /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
1419 264 : if (bc)
1420 : {
1421 0 : if (tm->tm_year > 0)
1422 0 : tm->tm_year = -(tm->tm_year - 1);
1423 : else
1424 0 : return -1;
1425 : }
1426 264 : else if (is2digits)
1427 : {
1428 62 : if (tm->tm_year < 70)
1429 24 : tm->tm_year += 2000;
1430 38 : else if (tm->tm_year < 100)
1431 38 : tm->tm_year += 1900;
1432 : }
1433 :
1434 264 : return 0;
1435 : } /* DecodeDate() */
1436 :
1437 :
1438 : /*
1439 : * DecodeTime()
1440 : * Decode time string which includes delimiters.
1441 : * Only check the lower limit on hours, since this same code
1442 : * can be used to represent time spans.
1443 : */
1444 : int
1445 250 : DecodeTime(char *str, int *tmask, struct tm *tm, fsec_t *fsec)
1446 : {
1447 : char *cp;
1448 :
1449 250 : *tmask = DTK_TIME_M;
1450 :
1451 250 : tm->tm_hour = strtoint(str, &cp, 10);
1452 250 : if (*cp != ':')
1453 0 : return -1;
1454 250 : str = cp + 1;
1455 250 : tm->tm_min = strtoint(str, &cp, 10);
1456 250 : if (*cp == '\0')
1457 : {
1458 68 : tm->tm_sec = 0;
1459 68 : *fsec = 0;
1460 : }
1461 182 : else if (*cp != ':')
1462 0 : return -1;
1463 : else
1464 : {
1465 182 : str = cp + 1;
1466 182 : tm->tm_sec = strtoint(str, &cp, 10);
1467 182 : if (*cp == '\0')
1468 114 : *fsec = 0;
1469 68 : else if (*cp == '.')
1470 : {
1471 : char fstr[7];
1472 : int i;
1473 :
1474 68 : cp++;
1475 :
1476 : /*
1477 : * OK, we have at most six digits to care about. Let's construct a
1478 : * string with those digits, zero-padded on the right, and then do
1479 : * the conversion to an integer.
1480 : *
1481 : * XXX This truncates the seventh digit, unlike rounding it as the
1482 : * backend does.
1483 : */
1484 476 : for (i = 0; i < 6; i++)
1485 408 : fstr[i] = *cp != '\0' ? *cp++ : '0';
1486 68 : fstr[i] = '\0';
1487 68 : *fsec = strtoint(fstr, &cp, 10);
1488 68 : if (*cp != '\0')
1489 0 : return -1;
1490 : }
1491 : else
1492 0 : return -1;
1493 : }
1494 :
1495 : /* do a sanity check */
1496 250 : if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_min > 59 ||
1497 250 : tm->tm_sec < 0 || tm->tm_sec > 59 || *fsec >= USECS_PER_SEC)
1498 0 : return -1;
1499 :
1500 250 : return 0;
1501 : } /* DecodeTime() */
1502 :
1503 : /*
1504 : * DecodeTimezone()
1505 : * Interpret string as a numeric timezone.
1506 : *
1507 : * Note: we allow timezone offsets up to 13:59. There are places that
1508 : * use +1300 summer time.
1509 : */
1510 : static int
1511 118 : DecodeTimezone(char *str, int *tzp)
1512 : {
1513 : int tz;
1514 : int hr,
1515 : min;
1516 : char *cp;
1517 : int len;
1518 :
1519 : /* assume leading character is "+" or "-" */
1520 118 : hr = strtoint(str + 1, &cp, 10);
1521 :
1522 : /* explicit delimiter? */
1523 118 : if (*cp == ':')
1524 34 : min = strtoint(cp + 1, &cp, 10);
1525 : /* otherwise, might have run things together... */
1526 84 : else if (*cp == '\0' && (len = strlen(str)) > 3)
1527 : {
1528 16 : min = strtoint(str + len - 2, &cp, 10);
1529 16 : if (min < 0 || min >= 60)
1530 0 : return -1;
1531 :
1532 16 : *(str + len - 2) = '\0';
1533 16 : hr = strtoint(str + 1, &cp, 10);
1534 16 : if (hr < 0 || hr > 13)
1535 0 : return -1;
1536 : }
1537 : else
1538 68 : min = 0;
1539 :
1540 118 : tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE;
1541 118 : if (*str == '-')
1542 34 : tz = -tz;
1543 :
1544 118 : *tzp = -tz;
1545 118 : return *cp != '\0';
1546 : } /* DecodeTimezone() */
1547 :
1548 :
1549 : /*
1550 : * DecodePosixTimezone()
1551 : * Interpret string as a POSIX-compatible timezone:
1552 : * PST-hh:mm
1553 : * PST+h
1554 : * - thomas 2000-03-15
1555 : */
1556 : static int
1557 0 : DecodePosixTimezone(char *str, int *tzp)
1558 : {
1559 : int val,
1560 : tz;
1561 : int type;
1562 : char *cp;
1563 : char delim;
1564 :
1565 0 : cp = str;
1566 0 : while (*cp != '\0' && isalpha((unsigned char) *cp))
1567 0 : cp++;
1568 :
1569 0 : if (DecodeTimezone(cp, &tz) != 0)
1570 0 : return -1;
1571 :
1572 0 : delim = *cp;
1573 0 : *cp = '\0';
1574 0 : type = DecodeSpecial(MAXDATEFIELDS - 1, str, &val);
1575 0 : *cp = delim;
1576 :
1577 0 : switch (type)
1578 : {
1579 0 : case DTZ:
1580 : case TZ:
1581 0 : *tzp = -(val + tz);
1582 0 : break;
1583 :
1584 0 : default:
1585 0 : return -1;
1586 : }
1587 :
1588 0 : return 0;
1589 : } /* DecodePosixTimezone() */
1590 :
1591 : /*
1592 : * ParseDateTime()
1593 : * Break string into tokens based on a date/time context.
1594 : * Several field types are assigned:
1595 : * DTK_NUMBER - digits and (possibly) a decimal point
1596 : * DTK_DATE - digits and two delimiters, or digits and text
1597 : * DTK_TIME - digits, colon delimiters, and possibly a decimal point
1598 : * DTK_STRING - text (no digits)
1599 : * DTK_SPECIAL - leading "+" or "-" followed by text
1600 : * DTK_TZ - leading "+" or "-" followed by digits
1601 : * Note that some field types can hold unexpected items:
1602 : * DTK_NUMBER can hold date fields (yy.ddd)
1603 : * DTK_STRING can hold months (January) and time zones (PST)
1604 : * DTK_DATE can hold Posix time zones (GMT-8)
1605 : *
1606 : * The "lowstr" work buffer must have at least strlen(timestr) + MAXDATEFIELDS
1607 : * bytes of space. On output, field[] entries will point into it.
1608 : * The field[] and ftype[] arrays must have at least MAXDATEFIELDS entries.
1609 : */
1610 : int
1611 418 : ParseDateTime(char *timestr, char *lowstr,
1612 : char **field, int *ftype, int *numfields, char **endstr)
1613 : {
1614 418 : int nf = 0;
1615 418 : char *lp = lowstr;
1616 :
1617 418 : *endstr = timestr;
1618 : /* outer loop through fields */
1619 2274 : while (*(*endstr) != '\0')
1620 : {
1621 : /* Record start of current field */
1622 1858 : if (nf >= MAXDATEFIELDS)
1623 2 : return -1;
1624 1856 : field[nf] = lp;
1625 :
1626 : /* leading digit? then date or time */
1627 1856 : if (isdigit((unsigned char) *(*endstr)))
1628 : {
1629 724 : *lp++ = *(*endstr)++;
1630 1872 : while (isdigit((unsigned char) *(*endstr)))
1631 1148 : *lp++ = *(*endstr)++;
1632 :
1633 : /* time field? */
1634 724 : if (*(*endstr) == ':')
1635 : {
1636 250 : ftype[nf] = DTK_TIME;
1637 250 : *lp++ = *(*endstr)++;
1638 250 : while (isdigit((unsigned char) *(*endstr)) ||
1639 1772 : (*(*endstr) == ':') || (*(*endstr) == '.'))
1640 1522 : *lp++ = *(*endstr)++;
1641 : }
1642 : /* date field? allow embedded text month */
1643 474 : else if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1644 240 : {
1645 : /* save delimiting character to use later */
1646 240 : char *dp = (*endstr);
1647 :
1648 240 : *lp++ = *(*endstr)++;
1649 : /* second field is all digits? then no embedded text month */
1650 240 : if (isdigit((unsigned char) *(*endstr)))
1651 : {
1652 180 : ftype[nf] = (*dp == '.') ? DTK_NUMBER : DTK_DATE;
1653 498 : while (isdigit((unsigned char) *(*endstr)))
1654 318 : *lp++ = *(*endstr)++;
1655 :
1656 : /*
1657 : * insist that the delimiters match to get a three-field
1658 : * date.
1659 : */
1660 180 : if (*(*endstr) == *dp)
1661 : {
1662 168 : ftype[nf] = DTK_DATE;
1663 168 : *lp++ = *(*endstr)++;
1664 572 : while (isdigit((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1665 404 : *lp++ = *(*endstr)++;
1666 : }
1667 : }
1668 : else
1669 : {
1670 60 : ftype[nf] = DTK_DATE;
1671 444 : while (isalnum((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1672 384 : *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1673 : }
1674 : }
1675 :
1676 : /*
1677 : * otherwise, number only and will determine year, month, day, or
1678 : * concatenated fields later...
1679 : */
1680 : else
1681 234 : ftype[nf] = DTK_NUMBER;
1682 : }
1683 : /* Leading decimal point? Then fractional seconds... */
1684 1132 : else if (*(*endstr) == '.')
1685 : {
1686 98 : *lp++ = *(*endstr)++;
1687 98 : while (isdigit((unsigned char) *(*endstr)))
1688 0 : *lp++ = *(*endstr)++;
1689 :
1690 98 : ftype[nf] = DTK_NUMBER;
1691 : }
1692 :
1693 : /*
1694 : * text? then date string, month, day of week, special, or timezone
1695 : */
1696 1034 : else if (isalpha((unsigned char) *(*endstr)))
1697 : {
1698 260 : ftype[nf] = DTK_STRING;
1699 260 : *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1700 1242 : while (isalpha((unsigned char) *(*endstr)))
1701 982 : *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1702 :
1703 : /*
1704 : * Full date string with leading text month? Could also be a POSIX
1705 : * time zone...
1706 : */
1707 260 : if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1708 : {
1709 24 : char *dp = (*endstr);
1710 :
1711 24 : ftype[nf] = DTK_DATE;
1712 24 : *lp++ = *(*endstr)++;
1713 168 : while (isdigit((unsigned char) *(*endstr)) || *(*endstr) == *dp)
1714 144 : *lp++ = *(*endstr)++;
1715 : }
1716 : }
1717 : /* skip leading spaces */
1718 774 : else if (isspace((unsigned char) *(*endstr)))
1719 : {
1720 628 : (*endstr)++;
1721 628 : continue;
1722 : }
1723 : /* sign? then special or numeric timezone */
1724 146 : else if (*(*endstr) == '+' || *(*endstr) == '-')
1725 : {
1726 102 : *lp++ = *(*endstr)++;
1727 : /* soak up leading whitespace */
1728 102 : while (isspace((unsigned char) *(*endstr)))
1729 0 : (*endstr)++;
1730 : /* numeric timezone? */
1731 204 : if (isdigit((unsigned char) *(*endstr)))
1732 : {
1733 102 : ftype[nf] = DTK_TZ;
1734 102 : *lp++ = *(*endstr)++;
1735 102 : while (isdigit((unsigned char) *(*endstr)) ||
1736 204 : (*(*endstr) == ':') || (*(*endstr) == '.'))
1737 102 : *lp++ = *(*endstr)++;
1738 : }
1739 : /* special? */
1740 0 : else if (isalpha((unsigned char) *(*endstr)))
1741 : {
1742 0 : ftype[nf] = DTK_SPECIAL;
1743 0 : *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1744 0 : while (isalpha((unsigned char) *(*endstr)))
1745 0 : *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1746 : }
1747 : /* otherwise something wrong... */
1748 : else
1749 0 : return -1;
1750 : }
1751 : /* ignore punctuation but use as delimiter */
1752 44 : else if (ispunct((unsigned char) *(*endstr)))
1753 : {
1754 44 : (*endstr)++;
1755 44 : continue;
1756 : }
1757 : /* otherwise, something is not right... */
1758 : else
1759 0 : return -1;
1760 :
1761 : /* force in a delimiter after each field */
1762 1184 : *lp++ = '\0';
1763 1184 : nf++;
1764 : }
1765 :
1766 416 : *numfields = nf;
1767 :
1768 416 : return 0;
1769 : } /* ParseDateTime() */
1770 :
1771 :
1772 : /*
1773 : * DecodeDateTime()
1774 : * Interpret previously parsed fields for general date and time.
1775 : * Return 0 if full date, 1 if only time, and -1 if problems.
1776 : * External format(s):
1777 : * "<weekday> <month>-<day>-<year> <hour>:<minute>:<second>"
1778 : * "Fri Feb-7-1997 15:23:27"
1779 : * "Feb-7-1997 15:23:27"
1780 : * "2-7-1997 15:23:27"
1781 : * "1997-2-7 15:23:27"
1782 : * "1997.038 15:23:27" (day of year 1-366)
1783 : * Also supports input in compact time:
1784 : * "970207 152327"
1785 : * "97038 152327"
1786 : * "20011225T040506.789-07"
1787 : *
1788 : * Use the system-provided functions to get the current time zone
1789 : * if not specified in the input string.
1790 : * If the date is outside the time_t system-supported time range,
1791 : * then assume UTC time zone. - thomas 1997-05-27
1792 : */
1793 : int
1794 358 : DecodeDateTime(char **field, int *ftype, int nf,
1795 : int *dtype, struct tm *tm, fsec_t *fsec, bool EuroDates)
1796 : {
1797 358 : int fmask = 0,
1798 : tmask,
1799 : type;
1800 358 : int ptype = 0; /* "prefix type" for ISO y2001m02d04 format */
1801 : int i;
1802 : int val;
1803 358 : int mer = HR24;
1804 358 : bool haveTextMonth = false;
1805 358 : bool is2digits = false;
1806 358 : bool bc = false;
1807 358 : int t = 0;
1808 358 : int *tzp = &t;
1809 :
1810 : /***
1811 : * We'll insist on at least all of the date fields, but initialize the
1812 : * remaining fields in case they are not set later...
1813 : ***/
1814 358 : *dtype = DTK_DATE;
1815 358 : tm->tm_hour = 0;
1816 358 : tm->tm_min = 0;
1817 358 : tm->tm_sec = 0;
1818 358 : *fsec = 0;
1819 : /* don't know daylight savings time status apriori */
1820 358 : tm->tm_isdst = -1;
1821 358 : if (tzp != NULL)
1822 358 : *tzp = 0;
1823 :
1824 1248 : for (i = 0; i < nf; i++)
1825 : {
1826 900 : switch (ftype[i])
1827 : {
1828 252 : case DTK_DATE:
1829 : /***
1830 : * Integral julian day with attached time zone?
1831 : * All other forms with JD will be separated into
1832 : * distinct fields, so we handle just this case here.
1833 : ***/
1834 252 : if (ptype == DTK_JULIAN)
1835 : {
1836 : char *cp;
1837 : int jday;
1838 :
1839 0 : if (tzp == NULL)
1840 0 : return -1;
1841 :
1842 0 : jday = strtoint(field[i], &cp, 10);
1843 0 : if (*cp != '-')
1844 0 : return -1;
1845 :
1846 0 : j2date(jday, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1847 : /* Get the time zone from the end of the string */
1848 0 : if (DecodeTimezone(cp, tzp) != 0)
1849 0 : return -1;
1850 :
1851 0 : tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1852 0 : ptype = 0;
1853 0 : break;
1854 : }
1855 : /***
1856 : * Already have a date? Then this might be a POSIX time
1857 : * zone with an embedded dash (e.g. "PST-3" == "EST") or
1858 : * a run-together time with trailing time zone (e.g. hhmmss-zz).
1859 : * - thomas 2001-12-25
1860 : ***/
1861 252 : else if (((fmask & DTK_DATE_M) == DTK_DATE_M)
1862 252 : || (ptype != 0))
1863 : {
1864 : /* No time zone accepted? Then quit... */
1865 0 : if (tzp == NULL)
1866 0 : return -1;
1867 :
1868 0 : if (isdigit((unsigned char) *field[i]) || ptype != 0)
1869 0 : {
1870 : char *cp;
1871 :
1872 0 : if (ptype != 0)
1873 : {
1874 : /* Sanity check; should not fail this test */
1875 0 : if (ptype != DTK_TIME)
1876 0 : return -1;
1877 0 : ptype = 0;
1878 : }
1879 :
1880 : /*
1881 : * Starts with a digit but we already have a time
1882 : * field? Then we are in trouble with a date and time
1883 : * already...
1884 : */
1885 0 : if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1886 0 : return -1;
1887 :
1888 0 : if ((cp = strchr(field[i], '-')) == NULL)
1889 0 : return -1;
1890 :
1891 : /* Get the time zone from the end of the string */
1892 0 : if (DecodeTimezone(cp, tzp) != 0)
1893 0 : return -1;
1894 0 : *cp = '\0';
1895 :
1896 : /*
1897 : * Then read the rest of the field as a concatenated
1898 : * time
1899 : */
1900 0 : if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], fmask,
1901 : &tmask, tm, fsec, &is2digits)) < 0)
1902 0 : return -1;
1903 :
1904 : /*
1905 : * modify tmask after returning from
1906 : * DecodeNumberField()
1907 : */
1908 0 : tmask |= DTK_M(TZ);
1909 : }
1910 : else
1911 : {
1912 0 : if (DecodePosixTimezone(field[i], tzp) != 0)
1913 0 : return -1;
1914 :
1915 0 : ftype[i] = DTK_TZ;
1916 0 : tmask = DTK_M(TZ);
1917 : }
1918 : }
1919 252 : else if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
1920 0 : return -1;
1921 252 : break;
1922 :
1923 248 : case DTK_TIME:
1924 248 : if (DecodeTime(field[i], &tmask, tm, fsec) != 0)
1925 0 : return -1;
1926 :
1927 : /*
1928 : * Check upper limit on hours; other limits checked in
1929 : * DecodeTime()
1930 : */
1931 : /* test for > 24:00:00 */
1932 248 : if (tm->tm_hour > 24 ||
1933 246 : (tm->tm_hour == 24 && (tm->tm_min > 0 || tm->tm_sec > 0)))
1934 2 : return -1;
1935 246 : break;
1936 :
1937 102 : case DTK_TZ:
1938 : {
1939 : int tz;
1940 :
1941 102 : if (tzp == NULL)
1942 0 : return -1;
1943 :
1944 102 : if (DecodeTimezone(field[i], &tz) != 0)
1945 0 : return -1;
1946 :
1947 : /*
1948 : * Already have a time zone? Then maybe this is the second
1949 : * field of a POSIX time: EST+3 (equivalent to PST)
1950 : */
1951 102 : if (i > 0 && (fmask & DTK_M(TZ)) != 0 &&
1952 0 : ftype[i - 1] == DTK_TZ &&
1953 0 : isalpha((unsigned char) *field[i - 1]))
1954 : {
1955 0 : *tzp -= tz;
1956 0 : tmask = 0;
1957 : }
1958 : else
1959 : {
1960 102 : *tzp = tz;
1961 102 : tmask = DTK_M(TZ);
1962 : }
1963 : }
1964 102 : break;
1965 :
1966 156 : case DTK_NUMBER:
1967 :
1968 : /*
1969 : * Was this an "ISO date" with embedded field labels? An
1970 : * example is "y2001m02d04" - thomas 2001-02-04
1971 : */
1972 156 : if (ptype != 0)
1973 : {
1974 : char *cp;
1975 : int value;
1976 :
1977 12 : value = strtoint(field[i], &cp, 10);
1978 :
1979 : /*
1980 : * only a few kinds are allowed to have an embedded
1981 : * decimal
1982 : */
1983 12 : if (*cp == '.')
1984 0 : switch (ptype)
1985 : {
1986 0 : case DTK_JULIAN:
1987 : case DTK_TIME:
1988 : case DTK_SECOND:
1989 0 : break;
1990 0 : default:
1991 0 : return 1;
1992 : break;
1993 : }
1994 12 : else if (*cp != '\0')
1995 0 : return -1;
1996 :
1997 12 : switch (ptype)
1998 : {
1999 0 : case DTK_YEAR:
2000 0 : tm->tm_year = value;
2001 0 : tmask = DTK_M(YEAR);
2002 0 : break;
2003 :
2004 0 : case DTK_MONTH:
2005 :
2006 : /*
2007 : * already have a month and hour? then assume
2008 : * minutes
2009 : */
2010 0 : if ((fmask & DTK_M(MONTH)) != 0 &&
2011 0 : (fmask & DTK_M(HOUR)) != 0)
2012 : {
2013 0 : tm->tm_min = value;
2014 0 : tmask = DTK_M(MINUTE);
2015 : }
2016 : else
2017 : {
2018 0 : tm->tm_mon = value;
2019 0 : tmask = DTK_M(MONTH);
2020 : }
2021 0 : break;
2022 :
2023 0 : case DTK_DAY:
2024 0 : tm->tm_mday = value;
2025 0 : tmask = DTK_M(DAY);
2026 0 : break;
2027 :
2028 0 : case DTK_HOUR:
2029 0 : tm->tm_hour = value;
2030 0 : tmask = DTK_M(HOUR);
2031 0 : break;
2032 :
2033 0 : case DTK_MINUTE:
2034 0 : tm->tm_min = value;
2035 0 : tmask = DTK_M(MINUTE);
2036 0 : break;
2037 :
2038 0 : case DTK_SECOND:
2039 0 : tm->tm_sec = value;
2040 0 : tmask = DTK_M(SECOND);
2041 0 : if (*cp == '.')
2042 : {
2043 : double frac;
2044 :
2045 0 : frac = strtod(cp, &cp);
2046 0 : if (*cp != '\0')
2047 0 : return -1;
2048 0 : *fsec = frac * 1000000;
2049 : }
2050 0 : break;
2051 :
2052 0 : case DTK_TZ:
2053 0 : tmask = DTK_M(TZ);
2054 0 : if (DecodeTimezone(field[i], tzp) != 0)
2055 0 : return -1;
2056 0 : break;
2057 :
2058 12 : case DTK_JULIAN:
2059 : /***
2060 : * previous field was a label for "julian date"?
2061 : ***/
2062 12 : tmask = DTK_DATE_M;
2063 12 : j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2064 : /* fractional Julian Day? */
2065 12 : if (*cp == '.')
2066 : {
2067 : double time;
2068 :
2069 0 : time = strtod(cp, &cp);
2070 0 : if (*cp != '\0')
2071 0 : return -1;
2072 :
2073 0 : tmask |= DTK_TIME_M;
2074 0 : dt2time((time * USECS_PER_DAY), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
2075 : }
2076 12 : break;
2077 :
2078 0 : case DTK_TIME:
2079 : /* previous field was "t" for ISO time */
2080 0 : if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], (fmask | DTK_DATE_M),
2081 : &tmask, tm, fsec, &is2digits)) < 0)
2082 0 : return -1;
2083 :
2084 0 : if (tmask != DTK_TIME_M)
2085 0 : return -1;
2086 0 : break;
2087 :
2088 0 : default:
2089 0 : return -1;
2090 : break;
2091 : }
2092 :
2093 12 : ptype = 0;
2094 12 : *dtype = DTK_DATE;
2095 : }
2096 : else
2097 : {
2098 : char *cp;
2099 : int flen;
2100 :
2101 144 : flen = strlen(field[i]);
2102 144 : cp = strchr(field[i], '.');
2103 :
2104 : /* Embedded decimal and no date yet? */
2105 144 : if (cp != NULL && !(fmask & DTK_DATE_M))
2106 : {
2107 14 : if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
2108 2 : return -1;
2109 : }
2110 : /* embedded decimal and several digits before? */
2111 130 : else if (cp != NULL && flen - strlen(cp) > 2)
2112 : {
2113 : /*
2114 : * Interpret as a concatenated date or time Set the
2115 : * type field to allow decoding other fields later.
2116 : * Example: 20011223 or 040506
2117 : */
2118 0 : if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2119 : &tmask, tm, fsec, &is2digits)) < 0)
2120 0 : return -1;
2121 : }
2122 130 : else if (flen > 4)
2123 : {
2124 30 : if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2125 : &tmask, tm, fsec, &is2digits)) < 0)
2126 0 : return -1;
2127 : }
2128 : /* otherwise it is a single date/time field... */
2129 100 : else if (DecodeNumber(flen, field[i], fmask,
2130 : &tmask, tm, fsec, &is2digits, EuroDates) != 0)
2131 0 : return -1;
2132 : }
2133 154 : break;
2134 :
2135 142 : case DTK_STRING:
2136 : case DTK_SPECIAL:
2137 142 : type = DecodeSpecial(i, field[i], &val);
2138 142 : if (type == IGNORE_DTF)
2139 0 : continue;
2140 :
2141 142 : tmask = DTK_M(type);
2142 142 : switch (type)
2143 : {
2144 0 : case RESERV:
2145 0 : switch (val)
2146 : {
2147 0 : case DTK_NOW:
2148 0 : tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
2149 0 : *dtype = DTK_DATE;
2150 0 : GetCurrentDateTime(tm);
2151 0 : break;
2152 :
2153 0 : case DTK_YESTERDAY:
2154 0 : tmask = DTK_DATE_M;
2155 0 : *dtype = DTK_DATE;
2156 0 : GetCurrentDateTime(tm);
2157 0 : j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - 1,
2158 : &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2159 0 : tm->tm_hour = 0;
2160 0 : tm->tm_min = 0;
2161 0 : tm->tm_sec = 0;
2162 0 : break;
2163 :
2164 0 : case DTK_TODAY:
2165 0 : tmask = DTK_DATE_M;
2166 0 : *dtype = DTK_DATE;
2167 0 : GetCurrentDateTime(tm);
2168 0 : tm->tm_hour = 0;
2169 0 : tm->tm_min = 0;
2170 0 : tm->tm_sec = 0;
2171 0 : break;
2172 :
2173 0 : case DTK_TOMORROW:
2174 0 : tmask = DTK_DATE_M;
2175 0 : *dtype = DTK_DATE;
2176 0 : GetCurrentDateTime(tm);
2177 0 : j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) + 1,
2178 : &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2179 0 : tm->tm_hour = 0;
2180 0 : tm->tm_min = 0;
2181 0 : tm->tm_sec = 0;
2182 0 : break;
2183 :
2184 0 : case DTK_ZULU:
2185 0 : tmask = (DTK_TIME_M | DTK_M(TZ));
2186 0 : *dtype = DTK_DATE;
2187 0 : tm->tm_hour = 0;
2188 0 : tm->tm_min = 0;
2189 0 : tm->tm_sec = 0;
2190 0 : if (tzp != NULL)
2191 0 : *tzp = 0;
2192 0 : break;
2193 :
2194 0 : default:
2195 0 : *dtype = val;
2196 : }
2197 :
2198 0 : break;
2199 :
2200 50 : case MONTH:
2201 :
2202 : /*
2203 : * already have a (numeric) month? then see if we can
2204 : * substitute...
2205 : */
2206 50 : if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
2207 4 : !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 && tm->tm_mon <= 31)
2208 : {
2209 4 : tm->tm_mday = tm->tm_mon;
2210 4 : tmask = DTK_M(DAY);
2211 : }
2212 50 : haveTextMonth = true;
2213 50 : tm->tm_mon = val;
2214 50 : break;
2215 :
2216 0 : case DTZMOD:
2217 :
2218 : /*
2219 : * daylight savings time modifier (solves "MET DST"
2220 : * syntax)
2221 : */
2222 0 : tmask |= DTK_M(DTZ);
2223 0 : tm->tm_isdst = 1;
2224 0 : if (tzp == NULL)
2225 0 : return -1;
2226 0 : *tzp -= val;
2227 0 : break;
2228 :
2229 34 : case DTZ:
2230 :
2231 : /*
2232 : * set mask for TZ here _or_ check for DTZ later when
2233 : * getting default timezone
2234 : */
2235 34 : tmask |= DTK_M(TZ);
2236 34 : tm->tm_isdst = 1;
2237 34 : if (tzp == NULL)
2238 0 : return -1;
2239 34 : *tzp = -val;
2240 34 : ftype[i] = DTK_TZ;
2241 34 : break;
2242 :
2243 0 : case TZ:
2244 0 : tm->tm_isdst = 0;
2245 0 : if (tzp == NULL)
2246 0 : return -1;
2247 0 : *tzp = -val;
2248 0 : ftype[i] = DTK_TZ;
2249 0 : break;
2250 :
2251 0 : case IGNORE_DTF:
2252 0 : break;
2253 :
2254 2 : case AMPM:
2255 2 : mer = val;
2256 2 : break;
2257 :
2258 12 : case ADBC:
2259 12 : bc = (val == BC);
2260 12 : break;
2261 :
2262 26 : case DOW:
2263 26 : tm->tm_wday = val;
2264 26 : break;
2265 :
2266 12 : case UNITS:
2267 12 : tmask = 0;
2268 12 : ptype = val;
2269 12 : break;
2270 :
2271 0 : case ISOTIME:
2272 :
2273 : /*
2274 : * This is a filler field "t" indicating that the next
2275 : * field is time. Try to verify that this is sensible.
2276 : */
2277 0 : tmask = 0;
2278 :
2279 : /* No preceding date? Then quit... */
2280 0 : if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2281 0 : return -1;
2282 :
2283 : /***
2284 : * We will need one of the following fields:
2285 : * DTK_NUMBER should be hhmmss.fff
2286 : * DTK_TIME should be hh:mm:ss.fff
2287 : * DTK_DATE should be hhmmss-zz
2288 : ***/
2289 0 : if (i >= nf - 1 ||
2290 0 : (ftype[i + 1] != DTK_NUMBER &&
2291 0 : ftype[i + 1] != DTK_TIME &&
2292 0 : ftype[i + 1] != DTK_DATE))
2293 0 : return -1;
2294 :
2295 0 : ptype = val;
2296 0 : break;
2297 :
2298 6 : default:
2299 6 : return -1;
2300 : }
2301 136 : break;
2302 :
2303 0 : default:
2304 0 : return -1;
2305 : }
2306 :
2307 890 : if (tmask & fmask)
2308 0 : return -1;
2309 890 : fmask |= tmask;
2310 : }
2311 :
2312 : /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
2313 348 : if (bc)
2314 : {
2315 12 : if (tm->tm_year > 0)
2316 12 : tm->tm_year = -(tm->tm_year - 1);
2317 : else
2318 0 : return -1;
2319 : }
2320 336 : else if (is2digits)
2321 : {
2322 12 : if (tm->tm_year < 70)
2323 0 : tm->tm_year += 2000;
2324 12 : else if (tm->tm_year < 100)
2325 12 : tm->tm_year += 1900;
2326 : }
2327 :
2328 348 : if (mer != HR24 && tm->tm_hour > 12)
2329 0 : return -1;
2330 348 : if (mer == AM && tm->tm_hour == 12)
2331 0 : tm->tm_hour = 0;
2332 348 : else if (mer == PM && tm->tm_hour != 12)
2333 0 : tm->tm_hour += 12;
2334 :
2335 : /* do additional checking for full date specs... */
2336 348 : if (*dtype == DTK_DATE)
2337 : {
2338 348 : if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2339 0 : return ((fmask & DTK_TIME_M) == DTK_TIME_M) ? 1 : -1;
2340 :
2341 : /*
2342 : * check for valid day of month and month, now that we know for sure
2343 : * the month and year...
2344 : */
2345 348 : if (tm->tm_mon < 1 || tm->tm_mday < 1 || tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2346 2 : return -1;
2347 :
2348 : /*
2349 : * backend tried to find local timezone here but we don't use the
2350 : * result afterwards anyway so we only check for this error: daylight
2351 : * savings time modifier but no standard timezone?
2352 : */
2353 346 : if ((fmask & DTK_DATE_M) == DTK_DATE_M && tzp != NULL && !(fmask & DTK_M(TZ)) && (fmask & DTK_M(DTZMOD)))
2354 0 : return -1;
2355 : }
2356 :
2357 346 : return 0;
2358 : } /* DecodeDateTime() */
2359 :
2360 : /*
2361 : * Function works as follows:
2362 : *
2363 : *
2364 : *
2365 : */
2366 :
2367 : static char *
2368 228 : find_end_token(char *str, char *fmt)
2369 : {
2370 : /*
2371 : * str: here is28the day12the hour fmt: here is%dthe day%hthe hour
2372 : *
2373 : * we extract the 28, we read the percent sign and the type "d" then this
2374 : * functions gets called as find_end_token("28the day12the hour", "the
2375 : * day%hthehour")
2376 : *
2377 : * fmt points to "the day%hthehour", next_percent points to %hthehour and
2378 : * we have to find a match for everything between these positions ("the
2379 : * day"). We look for "the day" in str and know that the pattern we are
2380 : * about to scan ends where this string starts (right after the "28")
2381 : *
2382 : * At the end, *fmt is '\0' and *str isn't. end_position then is
2383 : * unchanged.
2384 : */
2385 228 : char *end_position = NULL;
2386 : char *next_percent,
2387 228 : *subst_location = NULL;
2388 228 : int scan_offset = 0;
2389 : char last_char;
2390 :
2391 : /* are we at the end? */
2392 228 : if (!*fmt)
2393 : {
2394 34 : end_position = fmt;
2395 34 : return end_position;
2396 : }
2397 :
2398 : /* not at the end */
2399 198 : while (fmt[scan_offset] == '%' && fmt[scan_offset + 1])
2400 : {
2401 : /*
2402 : * there is no delimiter, skip to the next delimiter if we're reading
2403 : * a number and then something that is not a number "9:15pm", we might
2404 : * be able to recover with the strtol end pointer. Go for the next
2405 : * percent sign
2406 : */
2407 4 : scan_offset += 2;
2408 : }
2409 194 : next_percent = strchr(fmt + scan_offset, '%');
2410 194 : if (next_percent)
2411 : {
2412 : /*
2413 : * we don't want to allocate extra memory, so we temporarily set the
2414 : * '%' sign to '\0' and call strstr However since we allow whitespace
2415 : * to float around everything, we have to shorten the pattern until we
2416 : * reach a non-whitespace character
2417 : */
2418 :
2419 188 : subst_location = next_percent;
2420 214 : while (*(subst_location - 1) == ' ' && subst_location - 1 > fmt + scan_offset)
2421 26 : subst_location--;
2422 188 : last_char = *subst_location;
2423 188 : *subst_location = '\0';
2424 :
2425 : /*
2426 : * the haystack is the str and the needle is the original fmt but it
2427 : * ends at the position where the next percent sign would be
2428 : */
2429 :
2430 : /*
2431 : * There is one special case. Imagine: str = " 2", fmt = "%d %...",
2432 : * since we want to allow blanks as "dynamic" padding we have to
2433 : * accept this. Now, we are called with a fmt of " %..." and look for
2434 : * " " in str. We find it at the first position and never read the
2435 : * 2...
2436 : */
2437 188 : while (*str == ' ')
2438 0 : str++;
2439 188 : end_position = strstr(str, fmt + scan_offset);
2440 188 : *subst_location = last_char;
2441 : }
2442 : else
2443 : {
2444 : /*
2445 : * there is no other percent sign. So everything up to the end has to
2446 : * match.
2447 : */
2448 6 : end_position = str + strlen(str);
2449 : }
2450 194 : if (!end_position)
2451 : {
2452 : /*
2453 : * maybe we have the following case:
2454 : *
2455 : * str = "4:15am" fmt = "%M:%S %p"
2456 : *
2457 : * at this place we could have
2458 : *
2459 : * str = "15am" fmt = " %p"
2460 : *
2461 : * and have set fmt to " " because overwrote the % sign with a NULL
2462 : *
2463 : * In this case where we would have to match a space but can't find
2464 : * it, set end_position to the end of the string
2465 : */
2466 2 : if ((fmt + scan_offset)[0] == ' ' && fmt + scan_offset + 1 == subst_location)
2467 2 : end_position = str + strlen(str);
2468 : }
2469 194 : return end_position;
2470 : }
2471 :
2472 : static int
2473 228 : pgtypes_defmt_scan(union un_fmt_comb *scan_val, int scan_type, char **pstr, char *pfmt)
2474 : {
2475 : /*
2476 : * scan everything between pstr and pstr_end. This is not including the
2477 : * last character so we might set it to '\0' for the parsing
2478 : */
2479 :
2480 : char last_char;
2481 228 : int err = 0;
2482 : char *pstr_end;
2483 228 : char *strtol_end = NULL;
2484 :
2485 228 : while (**pstr == ' ')
2486 0 : pstr++;
2487 228 : pstr_end = find_end_token(*pstr, pfmt);
2488 228 : if (!pstr_end)
2489 : {
2490 : /* there was an error, no match */
2491 0 : return 1;
2492 : }
2493 228 : last_char = *pstr_end;
2494 228 : *pstr_end = '\0';
2495 :
2496 228 : switch (scan_type)
2497 : {
2498 202 : case PGTYPES_TYPE_UINT:
2499 :
2500 : /*
2501 : * numbers may be blank-padded, this is the only deviation from
2502 : * the fmt-string we accept
2503 : */
2504 202 : while (**pstr == ' ')
2505 0 : (*pstr)++;
2506 202 : errno = 0;
2507 202 : scan_val->uint_val = (unsigned int) strtol(*pstr, &strtol_end, 10);
2508 202 : if (errno)
2509 0 : err = 1;
2510 202 : break;
2511 2 : case PGTYPES_TYPE_UINT_LONG:
2512 2 : while (**pstr == ' ')
2513 0 : (*pstr)++;
2514 2 : errno = 0;
2515 2 : scan_val->luint_val = (unsigned long int) strtol(*pstr, &strtol_end, 10);
2516 2 : if (errno)
2517 0 : err = 1;
2518 2 : break;
2519 24 : case PGTYPES_TYPE_STRING_MALLOCED:
2520 24 : scan_val->str_val = pgtypes_strdup(*pstr);
2521 24 : if (scan_val->str_val == NULL)
2522 0 : err = 1;
2523 24 : break;
2524 : }
2525 228 : if (strtol_end && *strtol_end)
2526 18 : *pstr = strtol_end;
2527 : else
2528 210 : *pstr = pstr_end;
2529 228 : *pstr_end = last_char;
2530 228 : return err;
2531 : }
2532 :
2533 : /* XXX range checking */
2534 : int
2535 48 : PGTYPEStimestamp_defmt_scan(char **str, char *fmt, timestamp * d,
2536 : int *year, int *month, int *day,
2537 : int *hour, int *minute, int *second,
2538 : int *tz)
2539 : {
2540 : union un_fmt_comb scan_val;
2541 : int scan_type;
2542 :
2543 : char *pstr,
2544 : *pfmt,
2545 : *tmp;
2546 48 : int err = 1;
2547 : unsigned int j;
2548 : struct tm tm;
2549 :
2550 48 : pfmt = fmt;
2551 48 : pstr = *str;
2552 :
2553 548 : while (*pfmt)
2554 : {
2555 504 : err = 0;
2556 708 : while (*pfmt == ' ')
2557 204 : pfmt++;
2558 750 : while (*pstr == ' ')
2559 246 : pstr++;
2560 504 : if (*pfmt != '%')
2561 : {
2562 196 : if (*pfmt == *pstr)
2563 : {
2564 192 : pfmt++;
2565 192 : pstr++;
2566 : }
2567 : else
2568 : {
2569 : /* Error: no match */
2570 4 : err = 1;
2571 4 : return err;
2572 : }
2573 192 : continue;
2574 : }
2575 : /* here *pfmt equals '%' */
2576 308 : pfmt++;
2577 308 : switch (*pfmt)
2578 : {
2579 18 : case 'a':
2580 18 : pfmt++;
2581 :
2582 : /*
2583 : * we parse the day and see if it is a week day but we do not
2584 : * check if the week day really matches the date
2585 : */
2586 18 : err = 1;
2587 18 : j = 0;
2588 50 : while (pgtypes_date_weekdays_short[j])
2589 : {
2590 50 : if (strncmp(pgtypes_date_weekdays_short[j], pstr,
2591 50 : strlen(pgtypes_date_weekdays_short[j])) == 0)
2592 : {
2593 : /* found it */
2594 18 : err = 0;
2595 18 : pstr += strlen(pgtypes_date_weekdays_short[j]);
2596 18 : break;
2597 : }
2598 32 : j++;
2599 : }
2600 18 : break;
2601 0 : case 'A':
2602 : /* see note above */
2603 0 : pfmt++;
2604 0 : err = 1;
2605 0 : j = 0;
2606 0 : while (days[j])
2607 : {
2608 0 : if (strncmp(days[j], pstr, strlen(days[j])) == 0)
2609 : {
2610 : /* found it */
2611 0 : err = 0;
2612 0 : pstr += strlen(days[j]);
2613 0 : break;
2614 : }
2615 0 : j++;
2616 : }
2617 0 : break;
2618 24 : case 'b':
2619 : case 'h':
2620 24 : pfmt++;
2621 24 : err = 1;
2622 24 : j = 0;
2623 148 : while (months[j])
2624 : {
2625 148 : if (strncmp(months[j], pstr, strlen(months[j])) == 0)
2626 : {
2627 : /* found it */
2628 24 : err = 0;
2629 24 : pstr += strlen(months[j]);
2630 24 : *month = j + 1;
2631 24 : break;
2632 : }
2633 124 : j++;
2634 : }
2635 24 : break;
2636 14 : case 'B':
2637 : /* see note above */
2638 14 : pfmt++;
2639 14 : err = 1;
2640 14 : j = 0;
2641 114 : while (pgtypes_date_months[j])
2642 : {
2643 114 : if (strncmp(pgtypes_date_months[j], pstr, strlen(pgtypes_date_months[j])) == 0)
2644 : {
2645 : /* found it */
2646 14 : err = 0;
2647 14 : pstr += strlen(pgtypes_date_months[j]);
2648 14 : *month = j + 1;
2649 14 : break;
2650 : }
2651 100 : j++;
2652 : }
2653 14 : break;
2654 0 : case 'c':
2655 : /* XXX */
2656 0 : break;
2657 4 : case 'C':
2658 4 : pfmt++;
2659 4 : scan_type = PGTYPES_TYPE_UINT;
2660 4 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2661 4 : *year = scan_val.uint_val * 100;
2662 4 : break;
2663 42 : case 'd':
2664 : case 'e':
2665 42 : pfmt++;
2666 42 : scan_type = PGTYPES_TYPE_UINT;
2667 42 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2668 42 : *day = scan_val.uint_val;
2669 42 : break;
2670 0 : case 'D':
2671 :
2672 : /*
2673 : * we have to concatenate the strings in order to be able to
2674 : * find the end of the substitution
2675 : */
2676 0 : pfmt++;
2677 0 : tmp = pgtypes_alloc(strlen("%m/%d/%y") + strlen(pstr) + 1);
2678 0 : if (!tmp)
2679 0 : return 1;
2680 0 : strcpy(tmp, "%m/%d/%y");
2681 0 : strcat(tmp, pfmt);
2682 0 : err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2683 0 : free(tmp);
2684 0 : return err;
2685 4 : case 'm':
2686 4 : pfmt++;
2687 4 : scan_type = PGTYPES_TYPE_UINT;
2688 4 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2689 4 : *month = scan_val.uint_val;
2690 4 : break;
2691 4 : case 'y':
2692 : case 'g': /* XXX difference to y (ISO) */
2693 4 : pfmt++;
2694 4 : scan_type = PGTYPES_TYPE_UINT;
2695 4 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2696 4 : if (*year < 0)
2697 : {
2698 : /* not yet set */
2699 2 : *year = scan_val.uint_val;
2700 : }
2701 : else
2702 2 : *year += scan_val.uint_val;
2703 4 : if (*year < 100)
2704 2 : *year += 1900;
2705 4 : break;
2706 0 : case 'G':
2707 : /* XXX difference to %V (ISO) */
2708 0 : pfmt++;
2709 0 : scan_type = PGTYPES_TYPE_UINT;
2710 0 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2711 0 : *year = scan_val.uint_val;
2712 0 : break;
2713 42 : case 'H':
2714 : case 'I':
2715 : case 'k':
2716 : case 'l':
2717 42 : pfmt++;
2718 42 : scan_type = PGTYPES_TYPE_UINT;
2719 42 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2720 42 : *hour += scan_val.uint_val;
2721 42 : break;
2722 0 : case 'j':
2723 0 : pfmt++;
2724 0 : scan_type = PGTYPES_TYPE_UINT;
2725 0 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2726 :
2727 : /*
2728 : * XXX what should we do with that? We could say that it's
2729 : * sufficient if we have the year and the day within the year
2730 : * to get at least a specific day.
2731 : */
2732 0 : break;
2733 40 : case 'M':
2734 40 : pfmt++;
2735 40 : scan_type = PGTYPES_TYPE_UINT;
2736 40 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2737 40 : *minute = scan_val.uint_val;
2738 40 : break;
2739 4 : case 'n':
2740 4 : pfmt++;
2741 4 : if (*pstr == '\n')
2742 4 : pstr++;
2743 : else
2744 0 : err = 1;
2745 4 : break;
2746 8 : case 'p':
2747 8 : err = 1;
2748 8 : pfmt++;
2749 8 : if (strncmp(pstr, "am", 2) == 0)
2750 : {
2751 6 : *hour += 0;
2752 6 : err = 0;
2753 6 : pstr += 2;
2754 : }
2755 8 : if (strncmp(pstr, "a.m.", 4) == 0)
2756 : {
2757 0 : *hour += 0;
2758 0 : err = 0;
2759 0 : pstr += 4;
2760 : }
2761 8 : if (strncmp(pstr, "pm", 2) == 0)
2762 : {
2763 2 : *hour += 12;
2764 2 : err = 0;
2765 2 : pstr += 2;
2766 : }
2767 8 : if (strncmp(pstr, "p.m.", 4) == 0)
2768 : {
2769 0 : *hour += 12;
2770 0 : err = 0;
2771 0 : pstr += 4;
2772 : }
2773 8 : break;
2774 2 : case 'P':
2775 2 : err = 1;
2776 2 : pfmt++;
2777 2 : if (strncmp(pstr, "AM", 2) == 0)
2778 : {
2779 0 : *hour += 0;
2780 0 : err = 0;
2781 0 : pstr += 2;
2782 : }
2783 2 : if (strncmp(pstr, "A.M.", 4) == 0)
2784 : {
2785 0 : *hour += 0;
2786 0 : err = 0;
2787 0 : pstr += 4;
2788 : }
2789 2 : if (strncmp(pstr, "PM", 2) == 0)
2790 : {
2791 0 : *hour += 12;
2792 0 : err = 0;
2793 0 : pstr += 2;
2794 : }
2795 2 : if (strncmp(pstr, "P.M.", 4) == 0)
2796 : {
2797 2 : *hour += 12;
2798 2 : err = 0;
2799 2 : pstr += 4;
2800 : }
2801 2 : break;
2802 0 : case 'r':
2803 0 : pfmt++;
2804 0 : tmp = pgtypes_alloc(strlen("%I:%M:%S %p") + strlen(pstr) + 1);
2805 0 : if (!tmp)
2806 0 : return 1;
2807 0 : strcpy(tmp, "%I:%M:%S %p");
2808 0 : strcat(tmp, pfmt);
2809 0 : err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2810 0 : free(tmp);
2811 0 : return err;
2812 0 : case 'R':
2813 0 : pfmt++;
2814 0 : tmp = pgtypes_alloc(strlen("%H:%M") + strlen(pstr) + 1);
2815 0 : if (!tmp)
2816 0 : return 1;
2817 0 : strcpy(tmp, "%H:%M");
2818 0 : strcat(tmp, pfmt);
2819 0 : err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2820 0 : free(tmp);
2821 0 : return err;
2822 2 : case 's':
2823 2 : pfmt++;
2824 2 : scan_type = PGTYPES_TYPE_UINT_LONG;
2825 2 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2826 : /* number of seconds in scan_val.luint_val */
2827 : {
2828 : struct tm *tms;
2829 : struct tm tmbuf;
2830 2 : time_t et = (time_t) scan_val.luint_val;
2831 :
2832 2 : tms = gmtime_r(&et, &tmbuf);
2833 :
2834 2 : if (tms)
2835 : {
2836 2 : *year = tms->tm_year + 1900;
2837 2 : *month = tms->tm_mon + 1;
2838 2 : *day = tms->tm_mday;
2839 2 : *hour = tms->tm_hour;
2840 2 : *minute = tms->tm_min;
2841 2 : *second = tms->tm_sec;
2842 : }
2843 : else
2844 0 : err = 1;
2845 : }
2846 2 : break;
2847 30 : case 'S':
2848 30 : pfmt++;
2849 30 : scan_type = PGTYPES_TYPE_UINT;
2850 30 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2851 30 : *second = scan_val.uint_val;
2852 30 : break;
2853 0 : case 't':
2854 0 : pfmt++;
2855 0 : if (*pstr == '\t')
2856 0 : pstr++;
2857 : else
2858 0 : err = 1;
2859 0 : break;
2860 0 : case 'T':
2861 0 : pfmt++;
2862 0 : tmp = pgtypes_alloc(strlen("%H:%M:%S") + strlen(pstr) + 1);
2863 0 : if (!tmp)
2864 0 : return 1;
2865 0 : strcpy(tmp, "%H:%M:%S");
2866 0 : strcat(tmp, pfmt);
2867 0 : err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2868 0 : free(tmp);
2869 0 : return err;
2870 0 : case 'u':
2871 0 : pfmt++;
2872 0 : scan_type = PGTYPES_TYPE_UINT;
2873 0 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2874 0 : if (scan_val.uint_val < 1 || scan_val.uint_val > 7)
2875 0 : err = 1;
2876 0 : break;
2877 0 : case 'U':
2878 0 : pfmt++;
2879 0 : scan_type = PGTYPES_TYPE_UINT;
2880 0 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2881 0 : if (scan_val.uint_val > 53)
2882 0 : err = 1;
2883 0 : break;
2884 0 : case 'V':
2885 0 : pfmt++;
2886 0 : scan_type = PGTYPES_TYPE_UINT;
2887 0 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2888 0 : if (scan_val.uint_val < 1 || scan_val.uint_val > 53)
2889 0 : err = 1;
2890 0 : break;
2891 0 : case 'w':
2892 0 : pfmt++;
2893 0 : scan_type = PGTYPES_TYPE_UINT;
2894 0 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2895 0 : if (scan_val.uint_val > 6)
2896 0 : err = 1;
2897 0 : break;
2898 0 : case 'W':
2899 0 : pfmt++;
2900 0 : scan_type = PGTYPES_TYPE_UINT;
2901 0 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2902 0 : if (scan_val.uint_val > 53)
2903 0 : err = 1;
2904 0 : break;
2905 0 : case 'x':
2906 : case 'X':
2907 : /* XXX */
2908 0 : break;
2909 36 : case 'Y':
2910 36 : pfmt++;
2911 36 : scan_type = PGTYPES_TYPE_UINT;
2912 36 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2913 36 : *year = scan_val.uint_val;
2914 36 : break;
2915 16 : case 'z':
2916 16 : pfmt++;
2917 16 : scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2918 16 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2919 16 : if (!err)
2920 : {
2921 16 : err = DecodeTimezone(scan_val.str_val, tz);
2922 16 : free(scan_val.str_val);
2923 : }
2924 16 : break;
2925 8 : case 'Z':
2926 8 : pfmt++;
2927 8 : scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2928 8 : err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2929 8 : if (!err)
2930 : {
2931 : /*
2932 : * XXX use DecodeSpecial instead? Do we need strcasecmp
2933 : * here?
2934 : */
2935 8 : err = 1;
2936 400 : for (j = 0; j < szdatetktbl; j++)
2937 : {
2938 720 : if ((datetktbl[j].type == TZ || datetktbl[j].type == DTZ) &&
2939 320 : pg_strcasecmp(datetktbl[j].token,
2940 320 : scan_val.str_val) == 0)
2941 : {
2942 8 : *tz = -datetktbl[j].value;
2943 8 : err = 0;
2944 8 : break;
2945 : }
2946 : }
2947 8 : free(scan_val.str_val);
2948 : }
2949 8 : break;
2950 0 : case '+':
2951 : /* XXX */
2952 0 : break;
2953 8 : case '%':
2954 8 : pfmt++;
2955 8 : if (*pstr == '%')
2956 8 : pstr++;
2957 : else
2958 0 : err = 1;
2959 8 : break;
2960 2 : default:
2961 2 : err = 1;
2962 : }
2963 : }
2964 44 : if (!err)
2965 : {
2966 42 : if (*second < 0)
2967 10 : *second = 0;
2968 42 : if (*minute < 0)
2969 0 : *minute = 0;
2970 42 : if (*hour < 0)
2971 0 : *hour = 0;
2972 42 : if (*day < 0)
2973 : {
2974 0 : err = 1;
2975 0 : *day = 1;
2976 : }
2977 42 : if (*month < 0)
2978 : {
2979 0 : err = 1;
2980 0 : *month = 1;
2981 : }
2982 42 : if (*year < 0)
2983 : {
2984 0 : err = 1;
2985 0 : *year = 1970;
2986 : }
2987 :
2988 42 : if (*second > 59)
2989 : {
2990 0 : err = 1;
2991 0 : *second = 0;
2992 : }
2993 42 : if (*minute > 59)
2994 : {
2995 0 : err = 1;
2996 0 : *minute = 0;
2997 : }
2998 42 : if (*hour > 24 || /* test for > 24:00:00 */
2999 42 : (*hour == 24 && (*minute > 0 || *second > 0)))
3000 : {
3001 0 : err = 1;
3002 0 : *hour = 0;
3003 : }
3004 42 : if (*month > MONTHS_PER_YEAR)
3005 : {
3006 0 : err = 1;
3007 0 : *month = 1;
3008 : }
3009 42 : if (*day > day_tab[isleap(*year)][*month - 1])
3010 : {
3011 8 : *day = day_tab[isleap(*year)][*month - 1];
3012 8 : err = 1;
3013 : }
3014 :
3015 42 : tm.tm_sec = *second;
3016 42 : tm.tm_min = *minute;
3017 42 : tm.tm_hour = *hour;
3018 42 : tm.tm_mday = *day;
3019 42 : tm.tm_mon = *month;
3020 42 : tm.tm_year = *year;
3021 :
3022 42 : tm2timestamp(&tm, 0, tz, d);
3023 : }
3024 44 : return err;
3025 : }
3026 :
3027 : /* XXX: 1900 is compiled in as the base for years */
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