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 "extern.h"
10 #include "dt.h"
11 #include "pgtypes_timestamp.h"
12
13 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
17 typedef long AbsoluteTime;
18
19 static 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 {DCURRENT, RESERV, DTK_CURRENT}, /* "current" is always now */
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}, /* Greenwish 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 {INVALID, RESERV, DTK_INVALID}, /* "invalid" reserved for bad time */
205 {"iot", TZ, 18000}, /* Indian Chagos Time */
206 {"irkst", DTZ, 32400}, /* Irkutsk Summer Time */
207 {"irkt", TZ, 28800}, /* Irkutsk Time */
208 {"irt", TZ, 12600}, /* Iran Time */
209 {"isodow", UNITS, DTK_ISODOW}, /* ISO day of week, Sunday == 7 */
210 #if 0
211 isst
212 #endif
213 {"ist", TZ, 7200}, /* Israel */
214 {"it", TZ, 12600}, /* Iran Time */
215 {"j", UNITS, DTK_JULIAN},
216 {"jan", MONTH, 1},
217 {"january", MONTH, 1},
218 {"javt", TZ, 25200}, /* Java Time (07:00? see JT) */
219 {"jayt", TZ, 32400}, /* Jayapura Time (Indonesia) */
220 {"jd", UNITS, DTK_JULIAN},
221 {"jst", TZ, 32400}, /* Japan Std Time,USSR Zone 8 */
222 {"jt", TZ, 27000}, /* Java Time (07:30? see JAVT) */
223 {"jul", MONTH, 7},
224 {"julian", UNITS, DTK_JULIAN},
225 {"july", MONTH, 7},
226 {"jun", MONTH, 6},
227 {"june", MONTH, 6},
228 {"kdt", DTZ, 36000}, /* Korea Daylight Time */
229 {"kgst", DTZ, 21600}, /* Kyrgyzstan Summer Time */
230 {"kgt", TZ, 18000}, /* Kyrgyzstan Time */
231 {"kost", TZ, 43200}, /* Kosrae Time */
232 {"krast", DTZ, 25200}, /* Krasnoyarsk Summer Time */
233 {"krat", TZ, 28800}, /* Krasnoyarsk Standard Time */
234 {"kst", TZ, 32400}, /* Korea Standard Time */
235 {"lhdt", DTZ, 39600}, /* Lord Howe Daylight Time, Australia */
236 {"lhst", TZ, 37800}, /* Lord Howe Standard Time, Australia */
237 {"ligt", TZ, 36000}, /* From Melbourne, Australia */
238 {"lint", TZ, 50400}, /* Line Islands Time (Kiribati; +14 hours!) */
239 {"lkt", TZ, 21600}, /* Lanka Time */
240 {"m", UNITS, DTK_MONTH}, /* "month" for ISO input */
241 {"magst", DTZ, 43200}, /* Magadan Summer Time */
242 {"magt", TZ, 39600}, /* Magadan Time */
243 {"mar", MONTH, 3},
244 {"march", MONTH, 3},
245 {"mart", TZ, -34200}, /* Marquesas Time */
246 {"mawt", TZ, 21600}, /* Mawson, Antarctica */
247 {"may", MONTH, 5},
248 {"mdt", DTZ, -21600}, /* Mountain Daylight Time */
249 {"mest", DTZ, 7200}, /* Middle Europe Summer Time */
250 {"met", TZ, 3600}, /* Middle Europe Time */
251 {"metdst", DTZ, 7200}, /* Middle Europe Daylight Time */
252 {"mewt", TZ, 3600}, /* Middle Europe Winter Time */
253 {"mez", TZ, 3600}, /* Middle Europe Zone */
254 {"mht", TZ, 43200}, /* Kwajalein */
255 {"mm", UNITS, DTK_MINUTE}, /* "minute" for ISO input */
256 {"mmt", TZ, 23400}, /* Myannar Time */
257 {"mon", DOW, 1},
258 {"monday", DOW, 1},
259 #if 0
260 most
261 #endif
262 {"mpt", TZ, 36000}, /* North Mariana Islands Time */
263 {"msd", DTZ, 14400}, /* Moscow Summer Time */
264 {"msk", TZ, 10800}, /* Moscow Time */
265 {"mst", TZ, -25200}, /* Mountain Standard Time */
266 {"mt", TZ, 30600}, /* Moluccas Time */
267 {"mut", TZ, 14400}, /* Mauritius Island Time */
268 {"mvt", TZ, 18000}, /* Maldives Island Time */
269 {"myt", TZ, 28800}, /* Malaysia Time */
270 #if 0
271 ncst
272 #endif
273 {"nct", TZ, 39600}, /* New Caledonia Time */
274 {"ndt", DTZ, -9000}, /* Nfld. Daylight Time */
275 {"nft", TZ, -12600}, /* Newfoundland Standard Time */
276 {"nor", TZ, 3600}, /* Norway Standard Time */
277 {"nov", MONTH, 11},
278 {"november", MONTH, 11},
279 {"novst", DTZ, 25200}, /* Novosibirsk Summer Time */
280 {"novt", TZ, 21600}, /* Novosibirsk Standard Time */
281 {NOW, RESERV, DTK_NOW}, /* current transaction time */
282 {"npt", TZ, 20700}, /* Nepal Standard Time (GMT-5:45) */
283 {"nst", TZ, -12600}, /* Nfld. Standard Time */
284 {"nt", TZ, -39600}, /* Nome Time */
285 {"nut", TZ, -39600}, /* Niue Time */
286 {"nzdt", DTZ, 46800}, /* New Zealand Daylight Time */
287 {"nzst", TZ, 43200}, /* New Zealand Standard Time */
288 {"nzt", TZ, 43200}, /* New Zealand Time */
289 {"oct", MONTH, 10},
290 {"october", MONTH, 10},
291 {"omsst", DTZ, 25200}, /* Omsk Summer Time */
292 {"omst", TZ, 21600}, /* Omsk Time */
293 {"on", IGNORE_DTF, 0}, /* "on" (throwaway) */
294 {"pdt", DTZ, -25200}, /* Pacific Daylight Time */
295 #if 0
296 pest
297 #endif
298 {"pet", TZ, -18000}, /* Peru Time */
299 {"petst", DTZ, 46800}, /* Petropavlovsk-Kamchatski Summer Time */
300 {"pett", TZ, 43200}, /* Petropavlovsk-Kamchatski Time */
301 {"pgt", TZ, 36000}, /* Papua New Guinea Time */
302 {"phot", TZ, 46800}, /* Phoenix Islands (Kiribati) Time */
303 #if 0
304 phst
305 #endif
306 {"pht", TZ, 28800}, /* Philippine Time */
307 {"pkt", TZ, 18000}, /* Pakistan Time */
308 {"pm", AMPM, PM},
309 {"pmdt", DTZ, -7200}, /* Pierre & Miquelon Daylight Time */
310 #if 0
311 pmst
312 #endif
313 {"pont", TZ, 39600}, /* Ponape Time (Micronesia) */
314 {"pst", TZ, -28800}, /* Pacific Standard Time */
315 {"pwt", TZ, 32400}, /* Palau Time */
316 {"pyst", DTZ, -10800}, /* Paraguay Summer Time */
317 {"pyt", TZ, -14400}, /* Paraguay Time */
318 {"ret", DTZ, 14400}, /* Reunion Island Time */
319 {"s", UNITS, DTK_SECOND}, /* "seconds" for ISO input */
320 {"sadt", DTZ, 37800}, /* S. Australian Dayl. Time */
321 #if 0
322 samst
323 samt
324 #endif
325 {"sast", TZ, 34200}, /* South Australian Std Time */
326 {"sat", DOW, 6},
327 {"saturday", DOW, 6},
328 #if 0
329 sbt
330 #endif
331 {"sct", DTZ, 14400}, /* Mahe Island Time */
332 {"sep", MONTH, 9},
333 {"sept", MONTH, 9},
334 {"september", MONTH, 9},
335 {"set", TZ, -3600}, /* Seychelles Time ?? */
336 #if 0
337 sgt
338 #endif
339 {"sst", DTZ, 7200}, /* Swedish Summer Time */
340 {"sun", DOW, 0},
341 {"sunday", DOW, 0},
342 {"swt", TZ, 3600}, /* Swedish Winter Time */
343 #if 0
344 syot
345 #endif
346 {"t", ISOTIME, DTK_TIME}, /* Filler for ISO time fields */
347 {"tft", TZ, 18000}, /* Kerguelen Time */
348 {"that", TZ, -36000}, /* Tahiti Time */
349 {"thu", DOW, 4},
350 {"thur", DOW, 4},
351 {"thurs", DOW, 4},
352 {"thursday", DOW, 4},
353 {"tjt", TZ, 18000}, /* Tajikistan Time */
354 {"tkt", TZ, -36000}, /* Tokelau Time */
355 {"tmt", TZ, 18000}, /* Turkmenistan Time */
356 {TODAY, RESERV, DTK_TODAY}, /* midnight */
357 {TOMORROW, RESERV, DTK_TOMORROW}, /* tomorrow midnight */
358 #if 0
359 tost
360 #endif
361 {"tot", TZ, 46800}, /* Tonga Time */
362 #if 0
363 tpt
364 #endif
365 {"truk", TZ, 36000}, /* Truk Time */
366 {"tue", DOW, 2},
367 {"tues", DOW, 2},
368 {"tuesday", DOW, 2},
369 {"tvt", TZ, 43200}, /* Tuvalu Time */
370 #if 0
371 uct
372 #endif
373 {"ulast", DTZ, 32400}, /* Ulan Bator Summer Time */
374 {"ulat", TZ, 28800}, /* Ulan Bator Time */
375 {"undefined", RESERV, DTK_INVALID}, /* pre-v6.1 invalid time */
376 {"ut", TZ, 0},
377 {"utc", TZ, 0},
378 {"uyst", DTZ, -7200}, /* Uruguay Summer Time */
379 {"uyt", TZ, -10800}, /* Uruguay Time */
380 {"uzst", DTZ, 21600}, /* Uzbekistan Summer Time */
381 {"uzt", TZ, 18000}, /* Uzbekistan Time */
382 {"vet", TZ, -14400}, /* Venezuela Time */
383 {"vlast", DTZ, 39600}, /* Vladivostok Summer Time */
384 {"vlat", TZ, 36000}, /* Vladivostok Time */
385 #if 0
386 vust
387 #endif
388 {"vut", TZ, 39600}, /* Vanuata Time */
389 {"wadt", DTZ, 28800}, /* West Australian DST */
390 {"wakt", TZ, 43200}, /* Wake Time */
391 #if 0
392 warst
393 #endif
394 {"wast", TZ, 25200}, /* West Australian Std Time */
395 {"wat", TZ, -3600}, /* West Africa Time */
396 {"wdt", DTZ, 32400}, /* West Australian DST */
397 {"wed", DOW, 3},
398 {"wednesday", DOW, 3},
399 {"weds", DOW, 3},
400 {"west", DTZ, 3600}, /* Western Europe Summer Time */
401 {"wet", TZ, 0}, /* Western Europe */
402 {"wetdst", DTZ, 3600}, /* Western Europe Daylight Savings Time */
403 {"wft", TZ, 43200}, /* Wallis and Futuna Time */
404 {"wgst", DTZ, -7200}, /* West Greenland Summer Time */
405 {"wgt", TZ, -10800}, /* West Greenland Time */
406 {"wst", TZ, 28800}, /* West Australian Standard Time */
407 {"y", UNITS, DTK_YEAR}, /* "year" for ISO input */
408 {"yakst", DTZ, 36000}, /* Yakutsk Summer Time */
409 {"yakt", TZ, 32400}, /* Yakutsk Time */
410 {"yapt", TZ, 36000}, /* Yap Time (Micronesia) */
411 {"ydt", DTZ, -28800}, /* Yukon Daylight Time */
412 {"yekst", DTZ, 21600}, /* Yekaterinburg Summer Time */
413 {"yekt", TZ, 18000}, /* Yekaterinburg Time */
414 {YESTERDAY, RESERV, DTK_YESTERDAY}, /* yesterday midnight */
415 {"yst", TZ, -32400}, /* Yukon Standard Time */
416 {"z", TZ, 0}, /* time zone tag per ISO-8601 */
417 {"zp4", TZ, -14400}, /* UTC +4 hours. */
418 {"zp5", TZ, -18000}, /* UTC +5 hours. */
419 {"zp6", TZ, -21600}, /* UTC +6 hours. */
420 {ZULU, TZ, 0}, /* UTC */
421 };
422
423 static datetkn deltatktbl[] = {
424 /* text, token, lexval */
425 {"@", IGNORE_DTF, 0}, /* postgres relative prefix */
426 {DAGO, AGO, 0}, /* "ago" indicates negative time offset */
427 {"c", UNITS, DTK_CENTURY}, /* "century" relative */
428 {"cent", UNITS, DTK_CENTURY}, /* "century" relative */
429 {"centuries", UNITS, DTK_CENTURY}, /* "centuries" relative */
430 {DCENTURY, UNITS, DTK_CENTURY}, /* "century" relative */
431 {"d", UNITS, DTK_DAY}, /* "day" relative */
432 {DDAY, UNITS, DTK_DAY}, /* "day" relative */
433 {"days", UNITS, DTK_DAY}, /* "days" relative */
434 {"dec", UNITS, DTK_DECADE}, /* "decade" relative */
435 {DDECADE, UNITS, DTK_DECADE}, /* "decade" relative */
436 {"decades", UNITS, DTK_DECADE}, /* "decades" relative */
437 {"decs", UNITS, DTK_DECADE}, /* "decades" relative */
438 {"h", UNITS, DTK_HOUR}, /* "hour" relative */
439 {DHOUR, UNITS, DTK_HOUR}, /* "hour" relative */
440 {"hours", UNITS, DTK_HOUR}, /* "hours" relative */
441 {"hr", UNITS, DTK_HOUR}, /* "hour" relative */
442 {"hrs", UNITS, DTK_HOUR}, /* "hours" relative */
443 {INVALID, RESERV, DTK_INVALID}, /* reserved for invalid time */
444 {"m", UNITS, DTK_MINUTE}, /* "minute" relative */
445 {"microsecon", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
446 {"mil", UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
447 {"millennia", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
448 {DMILLENNIUM, UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
449 {"millisecon", UNITS, DTK_MILLISEC}, /* relative */
450 {"mils", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
451 {"min", UNITS, DTK_MINUTE}, /* "minute" relative */
452 {"mins", UNITS, DTK_MINUTE}, /* "minutes" relative */
453 {DMINUTE, UNITS, DTK_MINUTE}, /* "minute" relative */
454 {"minutes", UNITS, DTK_MINUTE}, /* "minutes" relative */
455 {"mon", UNITS, DTK_MONTH}, /* "months" relative */
456 {"mons", UNITS, DTK_MONTH}, /* "months" relative */
457 {DMONTH, UNITS, DTK_MONTH}, /* "month" relative */
458 {"months", UNITS, DTK_MONTH},
459 {"ms", UNITS, DTK_MILLISEC},
460 {"msec", UNITS, DTK_MILLISEC},
461 {DMILLISEC, UNITS, DTK_MILLISEC},
462 {"mseconds", UNITS, DTK_MILLISEC},
463 {"msecs", UNITS, DTK_MILLISEC},
464 {"qtr", UNITS, DTK_QUARTER}, /* "quarter" relative */
465 {DQUARTER, UNITS, DTK_QUARTER}, /* "quarter" relative */
466 {"s", UNITS, DTK_SECOND},
467 {"sec", UNITS, DTK_SECOND},
468 {DSECOND, UNITS, DTK_SECOND},
469 {"seconds", UNITS, DTK_SECOND},
470 {"secs", UNITS, DTK_SECOND},
471 {DTIMEZONE, UNITS, DTK_TZ}, /* "timezone" time offset */
472 {"timezone_h", UNITS, DTK_TZ_HOUR}, /* timezone hour units */
473 {"timezone_m", UNITS, DTK_TZ_MINUTE}, /* timezone minutes units */
474 {"undefined", RESERV, DTK_INVALID}, /* pre-v6.1 invalid time */
475 {"us", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
476 {"usec", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
477 {DMICROSEC, UNITS, DTK_MICROSEC}, /* "microsecond" relative */
478 {"useconds", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
479 {"usecs", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
480 {"w", UNITS, DTK_WEEK}, /* "week" relative */
481 {DWEEK, UNITS, DTK_WEEK}, /* "week" relative */
482 {"weeks", UNITS, DTK_WEEK}, /* "weeks" relative */
483 {"y", UNITS, DTK_YEAR}, /* "year" relative */
484 {DYEAR, UNITS, DTK_YEAR}, /* "year" relative */
485 {"years", UNITS, DTK_YEAR}, /* "years" relative */
486 {"yr", UNITS, DTK_YEAR}, /* "year" relative */
487 {"yrs", UNITS, DTK_YEAR}, /* "years" relative */
488 };
489
490 static const unsigned int szdatetktbl = lengthof(datetktbl);
491 static const unsigned int szdeltatktbl = lengthof(deltatktbl);
492
493 static datetkn *datecache[MAXDATEFIELDS] = {NULL};
494
495 static datetkn *deltacache[MAXDATEFIELDS] = {NULL};
496
497 char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL};
498
499 char *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", NULL};
500
501 char *pgtypes_date_weekdays_short[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL};
502
503 char *pgtypes_date_months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", NULL};
504
505 static datetkn *
datebsearch(char * key,datetkn * base,unsigned int nel)506 datebsearch(char *key, datetkn *base, unsigned int nel)
507 {
508 if (nel > 0)
509 {
510 datetkn *last = base + nel - 1,
511 *position;
512 int result;
513
514 while (last >= base)
515 {
516 position = base + ((last - base) >> 1);
517 /* precheck the first character for a bit of extra speed */
518 result = (int) key[0] - (int) position->token[0];
519 if (result == 0)
520 {
521 /* use strncmp so that we match truncated tokens */
522 result = strncmp(key, position->token, TOKMAXLEN);
523 if (result == 0)
524 return position;
525 }
526 if (result < 0)
527 last = position - 1;
528 else
529 base = position + 1;
530 }
531 }
532 return NULL;
533 }
534
535 /* DecodeUnits()
536 * Decode text string using lookup table.
537 * This routine supports time interval decoding.
538 */
539 int
DecodeUnits(int field,char * lowtoken,int * val)540 DecodeUnits(int field, char *lowtoken, int *val)
541 {
542 int type;
543 datetkn *tp;
544
545 /* use strncmp so that we match truncated tokens */
546 if (deltacache[field] != NULL &&
547 strncmp(lowtoken, deltacache[field]->token, TOKMAXLEN) == 0)
548 tp = deltacache[field];
549 else
550 tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
551 deltacache[field] = tp;
552 if (tp == NULL)
553 {
554 type = UNKNOWN_FIELD;
555 *val = 0;
556 }
557 else
558 {
559 type = tp->type;
560 *val = tp->value;
561 }
562
563 return type;
564 } /* DecodeUnits() */
565
566 /*
567 * Calendar time to Julian date conversions.
568 * Julian date is commonly used in astronomical applications,
569 * since it is numerically accurate and computationally simple.
570 * The algorithms here will accurately convert between Julian day
571 * and calendar date for all non-negative Julian days
572 * (i.e. from Nov 24, -4713 on).
573 *
574 * These routines will be used by other date/time packages
575 * - thomas 97/02/25
576 *
577 * Rewritten to eliminate overflow problems. This now allows the
578 * routines to work correctly for all Julian day counts from
579 * 0 to 2147483647 (Nov 24, -4713 to Jun 3, 5874898) assuming
580 * a 32-bit integer. Longer types should also work to the limits
581 * of their precision.
582 */
583
584 int
date2j(int y,int m,int d)585 date2j(int y, int m, int d)
586 {
587 int julian;
588 int century;
589
590 if (m > 2)
591 {
592 m += 1;
593 y += 4800;
594 }
595 else
596 {
597 m += 13;
598 y += 4799;
599 }
600
601 century = y / 100;
602 julian = y * 365 - 32167;
603 julian += y / 4 - century + century / 4;
604 julian += 7834 * m / 256 + d;
605
606 return julian;
607 } /* date2j() */
608
609 void
j2date(int jd,int * year,int * month,int * day)610 j2date(int jd, int *year, int *month, int *day)
611 {
612 unsigned int julian;
613 unsigned int quad;
614 unsigned int extra;
615 int y;
616
617 julian = jd;
618 julian += 32044;
619 quad = julian / 146097;
620 extra = (julian - quad * 146097) * 4 + 3;
621 julian += 60 + quad * 3 + extra / 146097;
622 quad = julian / 1461;
623 julian -= quad * 1461;
624 y = julian * 4 / 1461;
625 julian = ((y != 0) ? (julian + 305) % 365 : (julian + 306) % 366) + 123;
626 y += quad * 4;
627 *year = y - 4800;
628 quad = julian * 2141 / 65536;
629 *day = julian - 7834 * quad / 256;
630 *month = (quad + 10) % 12 + 1;
631
632 return;
633 } /* j2date() */
634
635 /* DecodeSpecial()
636 * Decode text string using lookup table.
637 * Implement a cache lookup since it is likely that dates
638 * will be related in format.
639 */
640 static int
DecodeSpecial(int field,char * lowtoken,int * val)641 DecodeSpecial(int field, char *lowtoken, int *val)
642 {
643 int type;
644 datetkn *tp;
645
646 /* use strncmp so that we match truncated tokens */
647 if (datecache[field] != NULL &&
648 strncmp(lowtoken, datecache[field]->token, TOKMAXLEN) == 0)
649 tp = datecache[field];
650 else
651 {
652 tp = NULL;
653 if (!tp)
654 tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
655 }
656 datecache[field] = tp;
657 if (tp == NULL)
658 {
659 type = UNKNOWN_FIELD;
660 *val = 0;
661 }
662 else
663 {
664 type = tp->type;
665 *val = tp->value;
666 }
667
668 return type;
669 } /* DecodeSpecial() */
670
671 /* EncodeDateOnly()
672 * Encode date as local time.
673 */
674 int
EncodeDateOnly(struct tm * tm,int style,char * str,bool EuroDates)675 EncodeDateOnly(struct tm *tm, int style, char *str, bool EuroDates)
676 {
677 if (tm->tm_mon < 1 || tm->tm_mon > MONTHS_PER_YEAR)
678 return -1;
679
680 switch (style)
681 {
682 case USE_ISO_DATES:
683 /* compatible with ISO date formats */
684 if (tm->tm_year > 0)
685 sprintf(str, "%04d-%02d-%02d",
686 tm->tm_year, tm->tm_mon, tm->tm_mday);
687 else
688 sprintf(str, "%04d-%02d-%02d %s",
689 -(tm->tm_year - 1), tm->tm_mon, tm->tm_mday, "BC");
690 break;
691
692 case USE_SQL_DATES:
693 /* compatible with Oracle/Ingres date formats */
694 if (EuroDates)
695 sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
696 else
697 sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
698 if (tm->tm_year > 0)
699 sprintf(str + 5, "/%04d", tm->tm_year);
700 else
701 sprintf(str + 5, "/%04d %s", -(tm->tm_year - 1), "BC");
702 break;
703
704 case USE_GERMAN_DATES:
705 /* German-style date format */
706 sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
707 if (tm->tm_year > 0)
708 sprintf(str + 5, ".%04d", tm->tm_year);
709 else
710 sprintf(str + 5, ".%04d %s", -(tm->tm_year - 1), "BC");
711 break;
712
713 case USE_POSTGRES_DATES:
714 default:
715 /* traditional date-only style for Postgres */
716 if (EuroDates)
717 sprintf(str, "%02d-%02d", tm->tm_mday, tm->tm_mon);
718 else
719 sprintf(str, "%02d-%02d", tm->tm_mon, tm->tm_mday);
720 if (tm->tm_year > 0)
721 sprintf(str + 5, "-%04d", tm->tm_year);
722 else
723 sprintf(str + 5, "-%04d %s", -(tm->tm_year - 1), "BC");
724 break;
725 }
726
727 return TRUE;
728 } /* EncodeDateOnly() */
729
730 void
TrimTrailingZeros(char * str)731 TrimTrailingZeros(char *str)
732 {
733 int len = strlen(str);
734
735 /* chop off trailing zeros... but leave at least 2 fractional digits */
736 while (*(str + len - 1) == '0' && *(str + len - 3) != '.')
737 {
738 len--;
739 *(str + len) = '\0';
740 }
741 }
742
743 /* EncodeDateTime()
744 * Encode date and time interpreted as local time.
745 *
746 * tm and fsec are the value to encode, print_tz determines whether to include
747 * a time zone (the difference between timestamp and timestamptz types), tz is
748 * the numeric time zone offset, tzn is the textual time zone, which if
749 * specified will be used instead of tz by some styles, style is the date
750 * style, str is where to write the output.
751 *
752 * Supported date styles:
753 * Postgres - day mon hh:mm:ss yyyy tz
754 * SQL - mm/dd/yyyy hh:mm:ss.ss tz
755 * ISO - yyyy-mm-dd hh:mm:ss+/-tz
756 * German - dd.mm.yyyy hh:mm:ss tz
757 * Variants (affects order of month and day for Postgres and SQL styles):
758 * US - mm/dd/yyyy
759 * European - dd/mm/yyyy
760 */
761 int
EncodeDateTime(struct tm * tm,fsec_t fsec,bool print_tz,int tz,const char * tzn,int style,char * str,bool EuroDates)762 EncodeDateTime(struct tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str, bool EuroDates)
763 {
764 int day,
765 hour,
766 min;
767
768 /*
769 * Negative tm_isdst means we have no valid time zone translation.
770 */
771 if (tm->tm_isdst < 0)
772 print_tz = false;
773
774 switch (style)
775 {
776 case USE_ISO_DATES:
777 /* Compatible with ISO-8601 date formats */
778
779 sprintf(str, "%04d-%02d-%02d %02d:%02d",
780 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
781 tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min);
782
783 /*
784 * Print fractional seconds if any. The field widths here should
785 * be at least equal to MAX_TIMESTAMP_PRECISION.
786 */
787 if (fsec != 0)
788 {
789 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
790 TrimTrailingZeros(str);
791 }
792 else
793 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
794
795 if (tm->tm_year <= 0)
796 sprintf(str + strlen(str), " BC");
797
798 if (print_tz)
799 {
800 hour = -(tz / SECS_PER_HOUR);
801 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
802 if (min != 0)
803 sprintf(str + strlen(str), "%+03d:%02d", hour, min);
804 else
805 sprintf(str + strlen(str), "%+03d", hour);
806 }
807 break;
808
809 case USE_SQL_DATES:
810 /* Compatible with Oracle/Ingres date formats */
811
812 if (EuroDates)
813 sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
814 else
815 sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
816
817 sprintf(str + 5, "/%04d %02d:%02d",
818 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
819 tm->tm_hour, tm->tm_min);
820
821 /*
822 * Print fractional seconds if any. The field widths here should
823 * be at least equal to MAX_TIMESTAMP_PRECISION.
824 */
825 if (fsec != 0)
826 {
827 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
828 TrimTrailingZeros(str);
829 }
830 else
831 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
832
833 if (tm->tm_year <= 0)
834 sprintf(str + strlen(str), " BC");
835
836 /*
837 * Note: the uses of %.*s in this function would be risky if the
838 * timezone names ever contain non-ASCII characters. However, all
839 * TZ abbreviations in the IANA database are plain ASCII.
840 */
841
842 if (print_tz)
843 {
844 if (tzn)
845 sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
846 else
847 {
848 hour = -(tz / SECS_PER_HOUR);
849 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
850 if (min != 0)
851 sprintf(str + strlen(str), "%+03d:%02d", hour, min);
852 else
853 sprintf(str + strlen(str), "%+03d", hour);
854 }
855 }
856 break;
857
858 case USE_GERMAN_DATES:
859 /* German variant on European style */
860
861 sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
862
863 sprintf(str + 5, ".%04d %02d:%02d",
864 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
865 tm->tm_hour, tm->tm_min);
866
867 /*
868 * Print fractional seconds if any. The field widths here should
869 * be at least equal to MAX_TIMESTAMP_PRECISION.
870 */
871 if (fsec != 0)
872 {
873 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
874 TrimTrailingZeros(str);
875 }
876 else
877 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
878
879 if (tm->tm_year <= 0)
880 sprintf(str + strlen(str), " BC");
881
882 if (print_tz)
883 {
884 if (tzn)
885 sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
886 else
887 {
888 hour = -(tz / SECS_PER_HOUR);
889 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
890 if (min != 0)
891 sprintf(str + strlen(str), "%+03d:%02d", hour, min);
892 else
893 sprintf(str + strlen(str), "%+03d", hour);
894 }
895 }
896 break;
897
898 case USE_POSTGRES_DATES:
899 default:
900 /* Backward-compatible with traditional Postgres abstime dates */
901
902 day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
903 tm->tm_wday = (int) ((day + date2j(2000, 1, 1) + 1) % 7);
904
905 memcpy(str, days[tm->tm_wday], 3);
906 strcpy(str + 3, " ");
907
908 if (EuroDates)
909 sprintf(str + 4, "%02d %3s", tm->tm_mday, months[tm->tm_mon - 1]);
910 else
911 sprintf(str + 4, "%3s %02d", months[tm->tm_mon - 1], tm->tm_mday);
912
913 sprintf(str + 10, " %02d:%02d", tm->tm_hour, tm->tm_min);
914
915 /*
916 * Print fractional seconds if any. The field widths here should
917 * be at least equal to MAX_TIMESTAMP_PRECISION.
918 */
919 if (fsec != 0)
920 {
921 sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
922 TrimTrailingZeros(str);
923 }
924 else
925 sprintf(str + strlen(str), ":%02d", tm->tm_sec);
926
927 sprintf(str + strlen(str), " %04d",
928 (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1));
929 if (tm->tm_year <= 0)
930 sprintf(str + strlen(str), " BC");
931
932 if (print_tz)
933 {
934 if (tzn)
935 sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
936 else
937 {
938 /*
939 * We have a time zone, but no string version. Use the
940 * numeric form, but be sure to include a leading space to
941 * avoid formatting something which would be rejected by
942 * the date/time parser later. - thomas 2001-10-19
943 */
944 hour = -(tz / SECS_PER_HOUR);
945 min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
946 if (min != 0)
947 sprintf(str + strlen(str), " %+03d:%02d", hour, min);
948 else
949 sprintf(str + strlen(str), " %+03d", hour);
950 }
951 }
952 break;
953 }
954
955 return TRUE;
956 } /* EncodeDateTime() */
957
958 int
GetEpochTime(struct tm * tm)959 GetEpochTime(struct tm *tm)
960 {
961 struct tm *t0;
962 time_t epoch = 0;
963
964 t0 = gmtime(&epoch);
965
966 if (t0)
967 {
968 tm->tm_year = t0->tm_year + 1900;
969 tm->tm_mon = t0->tm_mon + 1;
970 tm->tm_mday = t0->tm_mday;
971 tm->tm_hour = t0->tm_hour;
972 tm->tm_min = t0->tm_min;
973 tm->tm_sec = t0->tm_sec;
974
975 return 0;
976 }
977
978 return -1;
979 } /* GetEpochTime() */
980
981 static void
abstime2tm(AbsoluteTime _time,int * tzp,struct tm * tm,char ** tzn)982 abstime2tm(AbsoluteTime _time, int *tzp, struct tm *tm, char **tzn)
983 {
984 time_t time = (time_t) _time;
985 struct tm *tx;
986
987 errno = 0;
988 if (tzp != NULL)
989 tx = localtime((time_t *) &time);
990 else
991 tx = gmtime((time_t *) &time);
992
993 if (!tx)
994 {
995 errno = PGTYPES_TS_BAD_TIMESTAMP;
996 return;
997 }
998
999 tm->tm_year = tx->tm_year + 1900;
1000 tm->tm_mon = tx->tm_mon + 1;
1001 tm->tm_mday = tx->tm_mday;
1002 tm->tm_hour = tx->tm_hour;
1003 tm->tm_min = tx->tm_min;
1004 tm->tm_sec = tx->tm_sec;
1005 tm->tm_isdst = tx->tm_isdst;
1006
1007 #if defined(HAVE_TM_ZONE)
1008 tm->tm_gmtoff = tx->tm_gmtoff;
1009 tm->tm_zone = tx->tm_zone;
1010
1011 if (tzp != NULL)
1012 {
1013 /*
1014 * We have a brute force time zone per SQL99? Then use it without
1015 * change since we have already rotated to the time zone.
1016 */
1017 *tzp = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
1018
1019 /*
1020 * FreeBSD man pages indicate that this should work - tgl 97/04/23
1021 */
1022 if (tzn != NULL)
1023 {
1024 /*
1025 * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1026 * contains an error message, which doesn't fit in the buffer
1027 */
1028 StrNCpy(*tzn, tm->tm_zone, MAXTZLEN + 1);
1029 if (strlen(tm->tm_zone) > MAXTZLEN)
1030 tm->tm_isdst = -1;
1031 }
1032 }
1033 else
1034 tm->tm_isdst = -1;
1035 #elif defined(HAVE_INT_TIMEZONE)
1036 if (tzp != NULL)
1037 {
1038 *tzp = (tm->tm_isdst > 0) ? TIMEZONE_GLOBAL - SECS_PER_HOUR : TIMEZONE_GLOBAL;
1039
1040 if (tzn != NULL)
1041 {
1042 /*
1043 * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1044 * contains an error message, which doesn't fit in the buffer
1045 */
1046 StrNCpy(*tzn, TZNAME_GLOBAL[tm->tm_isdst], MAXTZLEN + 1);
1047 if (strlen(TZNAME_GLOBAL[tm->tm_isdst]) > MAXTZLEN)
1048 tm->tm_isdst = -1;
1049 }
1050 }
1051 else
1052 tm->tm_isdst = -1;
1053 #else /* not (HAVE_TM_ZONE || HAVE_INT_TIMEZONE) */
1054 if (tzp != NULL)
1055 {
1056 /* default to UTC */
1057 *tzp = 0;
1058 if (tzn != NULL)
1059 *tzn = NULL;
1060 }
1061 else
1062 tm->tm_isdst = -1;
1063 #endif
1064 }
1065
1066 void
GetCurrentDateTime(struct tm * tm)1067 GetCurrentDateTime(struct tm *tm)
1068 {
1069 int tz;
1070
1071 abstime2tm(time(NULL), &tz, tm, NULL);
1072 }
1073
1074 void
dt2time(double jd,int * hour,int * min,int * sec,fsec_t * fsec)1075 dt2time(double jd, int *hour, int *min, int *sec, fsec_t *fsec)
1076 {
1077 int64 time;
1078
1079 time = jd;
1080 *hour = time / USECS_PER_HOUR;
1081 time -= (*hour) * USECS_PER_HOUR;
1082 *min = time / USECS_PER_MINUTE;
1083 time -= (*min) * USECS_PER_MINUTE;
1084 *sec = time / USECS_PER_SEC;
1085 *fsec = time - (*sec * USECS_PER_SEC);
1086 } /* dt2time() */
1087
1088
1089
1090 /* DecodeNumberField()
1091 * Interpret numeric string as a concatenated date or time field.
1092 * Use the context of previously decoded fields to help with
1093 * the interpretation.
1094 */
1095 static int
DecodeNumberField(int len,char * str,int fmask,int * tmask,struct tm * tm,fsec_t * fsec,int * is2digits)1096 DecodeNumberField(int len, char *str, int fmask,
1097 int *tmask, struct tm *tm, fsec_t *fsec, int *is2digits)
1098 {
1099 char *cp;
1100
1101 /*
1102 * Have a decimal point? Then this is a date or something with a seconds
1103 * field...
1104 */
1105 if ((cp = strchr(str, '.')) != NULL)
1106 {
1107 char fstr[7];
1108 int i;
1109
1110 cp++;
1111
1112 /*
1113 * OK, we have at most six digits to care about. Let's construct a
1114 * string with those digits, zero-padded on the right, and then do the
1115 * conversion to an integer.
1116 *
1117 * XXX This truncates the seventh digit, unlike rounding it as the
1118 * backend does.
1119 */
1120 for (i = 0; i < 6; i++)
1121 fstr[i] = *cp != '\0' ? *cp++ : '0';
1122 fstr[i] = '\0';
1123 *fsec = strtol(fstr, NULL, 10);
1124 *cp = '\0';
1125 len = strlen(str);
1126 }
1127 /* No decimal point and no complete date yet? */
1128 else if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1129 {
1130 /* yyyymmdd? */
1131 if (len == 8)
1132 {
1133 *tmask = DTK_DATE_M;
1134
1135 tm->tm_mday = atoi(str + 6);
1136 *(str + 6) = '\0';
1137 tm->tm_mon = atoi(str + 4);
1138 *(str + 4) = '\0';
1139 tm->tm_year = atoi(str + 0);
1140
1141 return DTK_DATE;
1142 }
1143 /* yymmdd? */
1144 else if (len == 6)
1145 {
1146 *tmask = DTK_DATE_M;
1147 tm->tm_mday = atoi(str + 4);
1148 *(str + 4) = '\0';
1149 tm->tm_mon = atoi(str + 2);
1150 *(str + 2) = '\0';
1151 tm->tm_year = atoi(str + 0);
1152 *is2digits = TRUE;
1153
1154 return DTK_DATE;
1155 }
1156 /* yyddd? */
1157 else if (len == 5)
1158 {
1159 *tmask = DTK_DATE_M;
1160 tm->tm_mday = atoi(str + 2);
1161 *(str + 2) = '\0';
1162 tm->tm_mon = 1;
1163 tm->tm_year = atoi(str + 0);
1164 *is2digits = TRUE;
1165
1166 return DTK_DATE;
1167 }
1168 }
1169
1170 /* not all time fields are specified? */
1171 if ((fmask & DTK_TIME_M) != DTK_TIME_M)
1172 {
1173 /* hhmmss */
1174 if (len == 6)
1175 {
1176 *tmask = DTK_TIME_M;
1177 tm->tm_sec = atoi(str + 4);
1178 *(str + 4) = '\0';
1179 tm->tm_min = atoi(str + 2);
1180 *(str + 2) = '\0';
1181 tm->tm_hour = atoi(str + 0);
1182
1183 return DTK_TIME;
1184 }
1185 /* hhmm? */
1186 else if (len == 4)
1187 {
1188 *tmask = DTK_TIME_M;
1189 tm->tm_sec = 0;
1190 tm->tm_min = atoi(str + 2);
1191 *(str + 2) = '\0';
1192 tm->tm_hour = atoi(str + 0);
1193
1194 return DTK_TIME;
1195 }
1196 }
1197
1198 return -1;
1199 } /* DecodeNumberField() */
1200
1201
1202 /* DecodeNumber()
1203 * Interpret plain numeric field as a date value in context.
1204 */
1205 static int
DecodeNumber(int flen,char * str,int fmask,int * tmask,struct tm * tm,fsec_t * fsec,int * is2digits,bool EuroDates)1206 DecodeNumber(int flen, char *str, int fmask,
1207 int *tmask, struct tm *tm, fsec_t *fsec, int *is2digits, bool EuroDates)
1208 {
1209 int val;
1210 char *cp;
1211
1212 *tmask = 0;
1213
1214 val = strtol(str, &cp, 10);
1215 if (cp == str)
1216 return -1;
1217
1218 if (*cp == '.')
1219 {
1220 /*
1221 * More than two digits? Then could be a date or a run-together time:
1222 * 2001.360 20011225 040506.789
1223 */
1224 if (cp - str > 2)
1225 return DecodeNumberField(flen, str, (fmask | DTK_DATE_M),
1226 tmask, tm, fsec, is2digits);
1227
1228 *fsec = strtod(cp, &cp);
1229 if (*cp != '\0')
1230 return -1;
1231 }
1232 else if (*cp != '\0')
1233 return -1;
1234
1235 /* Special case day of year? */
1236 if (flen == 3 && (fmask & DTK_M(YEAR)) && val >= 1 && val <= 366)
1237 {
1238 *tmask = (DTK_M(DOY) | DTK_M(MONTH) | DTK_M(DAY));
1239 tm->tm_yday = val;
1240 j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
1241 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1242 }
1243
1244 /***
1245 * Enough digits to be unequivocal year? Used to test for 4 digits or
1246 * more, but we now test first for a three-digit doy so anything
1247 * bigger than two digits had better be an explicit year.
1248 * - thomas 1999-01-09
1249 * Back to requiring a 4 digit year. We accept a two digit
1250 * year farther down. - thomas 2000-03-28
1251 ***/
1252 else if (flen >= 4)
1253 {
1254 *tmask = DTK_M(YEAR);
1255
1256 /* already have a year? then see if we can substitute... */
1257 if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1258 tm->tm_year >= 1 && tm->tm_year <= 31)
1259 {
1260 tm->tm_mday = tm->tm_year;
1261 *tmask = DTK_M(DAY);
1262 }
1263
1264 tm->tm_year = val;
1265 }
1266
1267 /* already have year? then could be month */
1268 else if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1269 {
1270 *tmask = DTK_M(MONTH);
1271 tm->tm_mon = val;
1272 }
1273 /* no year and EuroDates enabled? then could be day */
1274 else if ((EuroDates || (fmask & DTK_M(MONTH))) &&
1275 !(fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1276 val >= 1 && val <= 31)
1277 {
1278 *tmask = DTK_M(DAY);
1279 tm->tm_mday = val;
1280 }
1281 else if (!(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1282 {
1283 *tmask = DTK_M(MONTH);
1284 tm->tm_mon = val;
1285 }
1286 else if (!(fmask & DTK_M(DAY)) && val >= 1 && val <= 31)
1287 {
1288 *tmask = DTK_M(DAY);
1289 tm->tm_mday = val;
1290 }
1291
1292 /*
1293 * Check for 2 or 4 or more digits, but currently we reach here only if
1294 * two digits. - thomas 2000-03-28
1295 */
1296 else if (!(fmask & DTK_M(YEAR)) && (flen >= 4 || flen == 2))
1297 {
1298 *tmask = DTK_M(YEAR);
1299 tm->tm_year = val;
1300
1301 /* adjust ONLY if exactly two digits... */
1302 *is2digits = (flen == 2);
1303 }
1304 else
1305 return -1;
1306
1307 return 0;
1308 } /* DecodeNumber() */
1309
1310 /* DecodeDate()
1311 * Decode date string which includes delimiters.
1312 * Insist on a complete set of fields.
1313 */
1314 static int
DecodeDate(char * str,int fmask,int * tmask,struct tm * tm,bool EuroDates)1315 DecodeDate(char *str, int fmask, int *tmask, struct tm *tm, bool EuroDates)
1316 {
1317 fsec_t fsec;
1318
1319 int nf = 0;
1320 int i,
1321 len;
1322 int bc = FALSE;
1323 int is2digits = FALSE;
1324 int type,
1325 val,
1326 dmask = 0;
1327 char *field[MAXDATEFIELDS];
1328
1329 /* parse this string... */
1330 while (*str != '\0' && nf < MAXDATEFIELDS)
1331 {
1332 /* skip field separators */
1333 while (!isalnum((unsigned char) *str))
1334 str++;
1335
1336 field[nf] = str;
1337 if (isdigit((unsigned char) *str))
1338 {
1339 while (isdigit((unsigned char) *str))
1340 str++;
1341 }
1342 else if (isalpha((unsigned char) *str))
1343 {
1344 while (isalpha((unsigned char) *str))
1345 str++;
1346 }
1347
1348 /* Just get rid of any non-digit, non-alpha characters... */
1349 if (*str != '\0')
1350 *str++ = '\0';
1351 nf++;
1352 }
1353
1354 #if 0
1355 /* don't allow too many fields */
1356 if (nf > 3)
1357 return -1;
1358 #endif
1359
1360 *tmask = 0;
1361
1362 /* look first for text fields, since that will be unambiguous month */
1363 for (i = 0; i < nf; i++)
1364 {
1365 if (isalpha((unsigned char) *field[i]))
1366 {
1367 type = DecodeSpecial(i, field[i], &val);
1368 if (type == IGNORE_DTF)
1369 continue;
1370
1371 dmask = DTK_M(type);
1372 switch (type)
1373 {
1374 case MONTH:
1375 tm->tm_mon = val;
1376 break;
1377
1378 case ADBC:
1379 bc = (val == BC);
1380 break;
1381
1382 default:
1383 return -1;
1384 }
1385 if (fmask & dmask)
1386 return -1;
1387
1388 fmask |= dmask;
1389 *tmask |= dmask;
1390
1391 /* mark this field as being completed */
1392 field[i] = NULL;
1393 }
1394 }
1395
1396 /* now pick up remaining numeric fields */
1397 for (i = 0; i < nf; i++)
1398 {
1399 if (field[i] == NULL)
1400 continue;
1401
1402 if ((len = strlen(field[i])) <= 0)
1403 return -1;
1404
1405 if (DecodeNumber(len, field[i], fmask, &dmask, tm, &fsec, &is2digits, EuroDates) != 0)
1406 return -1;
1407
1408 if (fmask & dmask)
1409 return -1;
1410
1411 fmask |= dmask;
1412 *tmask |= dmask;
1413 }
1414
1415 if ((fmask & ~(DTK_M(DOY) | DTK_M(TZ))) != DTK_DATE_M)
1416 return -1;
1417
1418 /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
1419 if (bc)
1420 {
1421 if (tm->tm_year > 0)
1422 tm->tm_year = -(tm->tm_year - 1);
1423 else
1424 return -1;
1425 }
1426 else if (is2digits)
1427 {
1428 if (tm->tm_year < 70)
1429 tm->tm_year += 2000;
1430 else if (tm->tm_year < 100)
1431 tm->tm_year += 1900;
1432 }
1433
1434 return 0;
1435 } /* DecodeDate() */
1436
1437
1438 /* DecodeTime()
1439 * Decode time string which includes delimiters.
1440 * Only check the lower limit on hours, since this same code
1441 * can be used to represent time spans.
1442 */
1443 int
DecodeTime(char * str,int * tmask,struct tm * tm,fsec_t * fsec)1444 DecodeTime(char *str, int *tmask, struct tm *tm, fsec_t *fsec)
1445 {
1446 char *cp;
1447
1448 *tmask = DTK_TIME_M;
1449
1450 tm->tm_hour = strtol(str, &cp, 10);
1451 if (*cp != ':')
1452 return -1;
1453 str = cp + 1;
1454 tm->tm_min = strtol(str, &cp, 10);
1455 if (*cp == '\0')
1456 {
1457 tm->tm_sec = 0;
1458 *fsec = 0;
1459 }
1460 else if (*cp != ':')
1461 return -1;
1462 else
1463 {
1464 str = cp + 1;
1465 tm->tm_sec = strtol(str, &cp, 10);
1466 if (*cp == '\0')
1467 *fsec = 0;
1468 else if (*cp == '.')
1469 {
1470 char fstr[7];
1471 int i;
1472
1473 cp++;
1474
1475 /*
1476 * OK, we have at most six digits to care about. Let's construct a
1477 * string with those digits, zero-padded on the right, and then do
1478 * the conversion to an integer.
1479 *
1480 * XXX This truncates the seventh digit, unlike rounding it as the
1481 * backend does.
1482 */
1483 for (i = 0; i < 6; i++)
1484 fstr[i] = *cp != '\0' ? *cp++ : '0';
1485 fstr[i] = '\0';
1486 *fsec = strtol(fstr, &cp, 10);
1487 if (*cp != '\0')
1488 return -1;
1489 }
1490 else
1491 return -1;
1492 }
1493
1494 /* do a sanity check */
1495 if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_min > 59 ||
1496 tm->tm_sec < 0 || tm->tm_sec > 59 || *fsec >= USECS_PER_SEC)
1497 return -1;
1498
1499 return 0;
1500 } /* DecodeTime() */
1501
1502 /* DecodeTimezone()
1503 * Interpret string as a numeric timezone.
1504 *
1505 * Note: we allow timezone offsets up to 13:59. There are places that
1506 * use +1300 summer time.
1507 */
1508 static int
DecodeTimezone(char * str,int * tzp)1509 DecodeTimezone(char *str, int *tzp)
1510 {
1511 int tz;
1512 int hr,
1513 min;
1514 char *cp;
1515 int len;
1516
1517 /* assume leading character is "+" or "-" */
1518 hr = strtol(str + 1, &cp, 10);
1519
1520 /* explicit delimiter? */
1521 if (*cp == ':')
1522 min = strtol(cp + 1, &cp, 10);
1523 /* otherwise, might have run things together... */
1524 else if (*cp == '\0' && (len = strlen(str)) > 3)
1525 {
1526 min = strtol(str + len - 2, &cp, 10);
1527 if (min < 0 || min >= 60)
1528 return -1;
1529
1530 *(str + len - 2) = '\0';
1531 hr = strtol(str + 1, &cp, 10);
1532 if (hr < 0 || hr > 13)
1533 return -1;
1534 }
1535 else
1536 min = 0;
1537
1538 tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE;
1539 if (*str == '-')
1540 tz = -tz;
1541
1542 *tzp = -tz;
1543 return *cp != '\0';
1544 } /* DecodeTimezone() */
1545
1546
1547 /* DecodePosixTimezone()
1548 * Interpret string as a POSIX-compatible timezone:
1549 * PST-hh:mm
1550 * PST+h
1551 * - thomas 2000-03-15
1552 */
1553 static int
DecodePosixTimezone(char * str,int * tzp)1554 DecodePosixTimezone(char *str, int *tzp)
1555 {
1556 int val,
1557 tz;
1558 int type;
1559 char *cp;
1560 char delim;
1561
1562 cp = str;
1563 while (*cp != '\0' && isalpha((unsigned char) *cp))
1564 cp++;
1565
1566 if (DecodeTimezone(cp, &tz) != 0)
1567 return -1;
1568
1569 delim = *cp;
1570 *cp = '\0';
1571 type = DecodeSpecial(MAXDATEFIELDS - 1, str, &val);
1572 *cp = delim;
1573
1574 switch (type)
1575 {
1576 case DTZ:
1577 case TZ:
1578 *tzp = -(val + tz);
1579 break;
1580
1581 default:
1582 return -1;
1583 }
1584
1585 return 0;
1586 } /* DecodePosixTimezone() */
1587
1588 /* ParseDateTime()
1589 * Break string into tokens based on a date/time context.
1590 * Several field types are assigned:
1591 * DTK_NUMBER - digits and (possibly) a decimal point
1592 * DTK_DATE - digits and two delimiters, or digits and text
1593 * DTK_TIME - digits, colon delimiters, and possibly a decimal point
1594 * DTK_STRING - text (no digits)
1595 * DTK_SPECIAL - leading "+" or "-" followed by text
1596 * DTK_TZ - leading "+" or "-" followed by digits
1597 * Note that some field types can hold unexpected items:
1598 * DTK_NUMBER can hold date fields (yy.ddd)
1599 * DTK_STRING can hold months (January) and time zones (PST)
1600 * DTK_DATE can hold Posix time zones (GMT-8)
1601 *
1602 * The "lowstr" work buffer must have at least strlen(timestr) + MAXDATEFIELDS
1603 * bytes of space. On output, field[] entries will point into it.
1604 * The field[] and ftype[] arrays must have at least MAXDATEFIELDS entries.
1605 */
1606 int
ParseDateTime(char * timestr,char * lowstr,char ** field,int * ftype,int * numfields,char ** endstr)1607 ParseDateTime(char *timestr, char *lowstr,
1608 char **field, int *ftype, int *numfields, char **endstr)
1609 {
1610 int nf = 0;
1611 char *lp = lowstr;
1612
1613 *endstr = timestr;
1614 /* outer loop through fields */
1615 while (*(*endstr) != '\0')
1616 {
1617 /* Record start of current field */
1618 if (nf >= MAXDATEFIELDS)
1619 return -1;
1620 field[nf] = lp;
1621
1622 /* leading digit? then date or time */
1623 if (isdigit((unsigned char) *(*endstr)))
1624 {
1625 *lp++ = *(*endstr)++;
1626 while (isdigit((unsigned char) *(*endstr)))
1627 *lp++ = *(*endstr)++;
1628
1629 /* time field? */
1630 if (*(*endstr) == ':')
1631 {
1632 ftype[nf] = DTK_TIME;
1633 *lp++ = *(*endstr)++;
1634 while (isdigit((unsigned char) *(*endstr)) ||
1635 (*(*endstr) == ':') || (*(*endstr) == '.'))
1636 *lp++ = *(*endstr)++;
1637 }
1638 /* date field? allow embedded text month */
1639 else if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1640 {
1641 /* save delimiting character to use later */
1642 char *dp = (*endstr);
1643
1644 *lp++ = *(*endstr)++;
1645 /* second field is all digits? then no embedded text month */
1646 if (isdigit((unsigned char) *(*endstr)))
1647 {
1648 ftype[nf] = (*dp == '.') ? DTK_NUMBER : DTK_DATE;
1649 while (isdigit((unsigned char) *(*endstr)))
1650 *lp++ = *(*endstr)++;
1651
1652 /*
1653 * insist that the delimiters match to get a three-field
1654 * date.
1655 */
1656 if (*(*endstr) == *dp)
1657 {
1658 ftype[nf] = DTK_DATE;
1659 *lp++ = *(*endstr)++;
1660 while (isdigit((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1661 *lp++ = *(*endstr)++;
1662 }
1663 }
1664 else
1665 {
1666 ftype[nf] = DTK_DATE;
1667 while (isalnum((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1668 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1669 }
1670 }
1671
1672 /*
1673 * otherwise, number only and will determine year, month, day, or
1674 * concatenated fields later...
1675 */
1676 else
1677 ftype[nf] = DTK_NUMBER;
1678 }
1679 /* Leading decimal point? Then fractional seconds... */
1680 else if (*(*endstr) == '.')
1681 {
1682 *lp++ = *(*endstr)++;
1683 while (isdigit((unsigned char) *(*endstr)))
1684 *lp++ = *(*endstr)++;
1685
1686 ftype[nf] = DTK_NUMBER;
1687 }
1688
1689 /*
1690 * text? then date string, month, day of week, special, or timezone
1691 */
1692 else if (isalpha((unsigned char) *(*endstr)))
1693 {
1694 ftype[nf] = DTK_STRING;
1695 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1696 while (isalpha((unsigned char) *(*endstr)))
1697 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1698
1699 /*
1700 * Full date string with leading text month? Could also be a POSIX
1701 * time zone...
1702 */
1703 if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1704 {
1705 char *dp = (*endstr);
1706
1707 ftype[nf] = DTK_DATE;
1708 *lp++ = *(*endstr)++;
1709 while (isdigit((unsigned char) *(*endstr)) || *(*endstr) == *dp)
1710 *lp++ = *(*endstr)++;
1711 }
1712 }
1713 /* skip leading spaces */
1714 else if (isspace((unsigned char) *(*endstr)))
1715 {
1716 (*endstr)++;
1717 continue;
1718 }
1719 /* sign? then special or numeric timezone */
1720 else if (*(*endstr) == '+' || *(*endstr) == '-')
1721 {
1722 *lp++ = *(*endstr)++;
1723 /* soak up leading whitespace */
1724 while (isspace((unsigned char) *(*endstr)))
1725 (*endstr)++;
1726 /* numeric timezone? */
1727 if (isdigit((unsigned char) *(*endstr)))
1728 {
1729 ftype[nf] = DTK_TZ;
1730 *lp++ = *(*endstr)++;
1731 while (isdigit((unsigned char) *(*endstr)) ||
1732 (*(*endstr) == ':') || (*(*endstr) == '.'))
1733 *lp++ = *(*endstr)++;
1734 }
1735 /* special? */
1736 else if (isalpha((unsigned char) *(*endstr)))
1737 {
1738 ftype[nf] = DTK_SPECIAL;
1739 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1740 while (isalpha((unsigned char) *(*endstr)))
1741 *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1742 }
1743 /* otherwise something wrong... */
1744 else
1745 return -1;
1746 }
1747 /* ignore punctuation but use as delimiter */
1748 else if (ispunct((unsigned char) *(*endstr)))
1749 {
1750 (*endstr)++;
1751 continue;
1752
1753 }
1754 /* otherwise, something is not right... */
1755 else
1756 return -1;
1757
1758 /* force in a delimiter after each field */
1759 *lp++ = '\0';
1760 nf++;
1761 }
1762
1763 *numfields = nf;
1764
1765 return 0;
1766 } /* ParseDateTime() */
1767
1768
1769 /* DecodeDateTime()
1770 * Interpret previously parsed fields for general date and time.
1771 * Return 0 if full date, 1 if only time, and -1 if problems.
1772 * External format(s):
1773 * "<weekday> <month>-<day>-<year> <hour>:<minute>:<second>"
1774 * "Fri Feb-7-1997 15:23:27"
1775 * "Feb-7-1997 15:23:27"
1776 * "2-7-1997 15:23:27"
1777 * "1997-2-7 15:23:27"
1778 * "1997.038 15:23:27" (day of year 1-366)
1779 * Also supports input in compact time:
1780 * "970207 152327"
1781 * "97038 152327"
1782 * "20011225T040506.789-07"
1783 *
1784 * Use the system-provided functions to get the current time zone
1785 * if not specified in the input string.
1786 * If the date is outside the time_t system-supported time range,
1787 * then assume UTC time zone. - thomas 1997-05-27
1788 */
1789 int
DecodeDateTime(char ** field,int * ftype,int nf,int * dtype,struct tm * tm,fsec_t * fsec,bool EuroDates)1790 DecodeDateTime(char **field, int *ftype, int nf,
1791 int *dtype, struct tm *tm, fsec_t *fsec, bool EuroDates)
1792 {
1793 int fmask = 0,
1794 tmask,
1795 type;
1796 int ptype = 0; /* "prefix type" for ISO y2001m02d04 format */
1797 int i;
1798 int val;
1799 int mer = HR24;
1800 int haveTextMonth = FALSE;
1801 int is2digits = FALSE;
1802 int bc = FALSE;
1803 int t = 0;
1804 int *tzp = &t;
1805
1806 /***
1807 * We'll insist on at least all of the date fields, but initialize the
1808 * remaining fields in case they are not set later...
1809 ***/
1810 *dtype = DTK_DATE;
1811 tm->tm_hour = 0;
1812 tm->tm_min = 0;
1813 tm->tm_sec = 0;
1814 *fsec = 0;
1815 /* don't know daylight savings time status apriori */
1816 tm->tm_isdst = -1;
1817 if (tzp != NULL)
1818 *tzp = 0;
1819
1820 for (i = 0; i < nf; i++)
1821 {
1822 switch (ftype[i])
1823 {
1824 case DTK_DATE:
1825 /***
1826 * Integral julian day with attached time zone?
1827 * All other forms with JD will be separated into
1828 * distinct fields, so we handle just this case here.
1829 ***/
1830 if (ptype == DTK_JULIAN)
1831 {
1832 char *cp;
1833 int val;
1834
1835 if (tzp == NULL)
1836 return -1;
1837
1838 val = strtol(field[i], &cp, 10);
1839 if (*cp != '-')
1840 return -1;
1841
1842 j2date(val, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1843 /* Get the time zone from the end of the string */
1844 if (DecodeTimezone(cp, tzp) != 0)
1845 return -1;
1846
1847 tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1848 ptype = 0;
1849 break;
1850 }
1851 /***
1852 * Already have a date? Then this might be a POSIX time
1853 * zone with an embedded dash (e.g. "PST-3" == "EST") or
1854 * a run-together time with trailing time zone (e.g. hhmmss-zz).
1855 * - thomas 2001-12-25
1856 ***/
1857 else if (((fmask & DTK_DATE_M) == DTK_DATE_M)
1858 || (ptype != 0))
1859 {
1860 /* No time zone accepted? Then quit... */
1861 if (tzp == NULL)
1862 return -1;
1863
1864 if (isdigit((unsigned char) *field[i]) || ptype != 0)
1865 {
1866 char *cp;
1867
1868 if (ptype != 0)
1869 {
1870 /* Sanity check; should not fail this test */
1871 if (ptype != DTK_TIME)
1872 return -1;
1873 ptype = 0;
1874 }
1875
1876 /*
1877 * Starts with a digit but we already have a time
1878 * field? Then we are in trouble with a date and time
1879 * already...
1880 */
1881 if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1882 return -1;
1883
1884 if ((cp = strchr(field[i], '-')) == NULL)
1885 return -1;
1886
1887 /* Get the time zone from the end of the string */
1888 if (DecodeTimezone(cp, tzp) != 0)
1889 return -1;
1890 *cp = '\0';
1891
1892 /*
1893 * Then read the rest of the field as a concatenated
1894 * time
1895 */
1896 if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], fmask,
1897 &tmask, tm, fsec, &is2digits)) < 0)
1898 return -1;
1899
1900 /*
1901 * modify tmask after returning from
1902 * DecodeNumberField()
1903 */
1904 tmask |= DTK_M(TZ);
1905 }
1906 else
1907 {
1908 if (DecodePosixTimezone(field[i], tzp) != 0)
1909 return -1;
1910
1911 ftype[i] = DTK_TZ;
1912 tmask = DTK_M(TZ);
1913 }
1914 }
1915 else if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
1916 return -1;
1917 break;
1918
1919 case DTK_TIME:
1920 if (DecodeTime(field[i], &tmask, tm, fsec) != 0)
1921 return -1;
1922
1923 /*
1924 * Check upper limit on hours; other limits checked in
1925 * DecodeTime()
1926 */
1927 /* test for > 24:00:00 */
1928 if (tm->tm_hour > 24 ||
1929 (tm->tm_hour == 24 && (tm->tm_min > 0 || tm->tm_sec > 0)))
1930 return -1;
1931 break;
1932
1933 case DTK_TZ:
1934 {
1935 int tz;
1936
1937 if (tzp == NULL)
1938 return -1;
1939
1940 if (DecodeTimezone(field[i], &tz) != 0)
1941 return -1;
1942
1943 /*
1944 * Already have a time zone? Then maybe this is the second
1945 * field of a POSIX time: EST+3 (equivalent to PST)
1946 */
1947 if (i > 0 && (fmask & DTK_M(TZ)) != 0 &&
1948 ftype[i - 1] == DTK_TZ &&
1949 isalpha((unsigned char) *field[i - 1]))
1950 {
1951 *tzp -= tz;
1952 tmask = 0;
1953 }
1954 else
1955 {
1956 *tzp = tz;
1957 tmask = DTK_M(TZ);
1958 }
1959 }
1960 break;
1961
1962 case DTK_NUMBER:
1963
1964 /*
1965 * Was this an "ISO date" with embedded field labels? An
1966 * example is "y2001m02d04" - thomas 2001-02-04
1967 */
1968 if (ptype != 0)
1969 {
1970 char *cp;
1971 int val;
1972
1973 val = strtol(field[i], &cp, 10);
1974
1975 /*
1976 * only a few kinds are allowed to have an embedded
1977 * decimal
1978 */
1979 if (*cp == '.')
1980 switch (ptype)
1981 {
1982 case DTK_JULIAN:
1983 case DTK_TIME:
1984 case DTK_SECOND:
1985 break;
1986 default:
1987 return 1;
1988 break;
1989 }
1990 else if (*cp != '\0')
1991 return -1;
1992
1993 switch (ptype)
1994 {
1995 case DTK_YEAR:
1996 tm->tm_year = val;
1997 tmask = DTK_M(YEAR);
1998 break;
1999
2000 case DTK_MONTH:
2001
2002 /*
2003 * already have a month and hour? then assume
2004 * minutes
2005 */
2006 if ((fmask & DTK_M(MONTH)) != 0 &&
2007 (fmask & DTK_M(HOUR)) != 0)
2008 {
2009 tm->tm_min = val;
2010 tmask = DTK_M(MINUTE);
2011 }
2012 else
2013 {
2014 tm->tm_mon = val;
2015 tmask = DTK_M(MONTH);
2016 }
2017 break;
2018
2019 case DTK_DAY:
2020 tm->tm_mday = val;
2021 tmask = DTK_M(DAY);
2022 break;
2023
2024 case DTK_HOUR:
2025 tm->tm_hour = val;
2026 tmask = DTK_M(HOUR);
2027 break;
2028
2029 case DTK_MINUTE:
2030 tm->tm_min = val;
2031 tmask = DTK_M(MINUTE);
2032 break;
2033
2034 case DTK_SECOND:
2035 tm->tm_sec = val;
2036 tmask = DTK_M(SECOND);
2037 if (*cp == '.')
2038 {
2039 double frac;
2040
2041 frac = strtod(cp, &cp);
2042 if (*cp != '\0')
2043 return -1;
2044 *fsec = frac * 1000000;
2045 }
2046 break;
2047
2048 case DTK_TZ:
2049 tmask = DTK_M(TZ);
2050 if (DecodeTimezone(field[i], tzp) != 0)
2051 return -1;
2052 break;
2053
2054 case DTK_JULIAN:
2055 /***
2056 * previous field was a label for "julian date"?
2057 ***/
2058 tmask = DTK_DATE_M;
2059 j2date(val, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2060 /* fractional Julian Day? */
2061 if (*cp == '.')
2062 {
2063 double time;
2064
2065 time = strtod(cp, &cp);
2066 if (*cp != '\0')
2067 return -1;
2068
2069 tmask |= DTK_TIME_M;
2070 dt2time((time * USECS_PER_DAY), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
2071 }
2072 break;
2073
2074 case DTK_TIME:
2075 /* previous field was "t" for ISO time */
2076 if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], (fmask | DTK_DATE_M),
2077 &tmask, tm, fsec, &is2digits)) < 0)
2078 return -1;
2079
2080 if (tmask != DTK_TIME_M)
2081 return -1;
2082 break;
2083
2084 default:
2085 return -1;
2086 break;
2087 }
2088
2089 ptype = 0;
2090 *dtype = DTK_DATE;
2091 }
2092 else
2093 {
2094 char *cp;
2095 int flen;
2096
2097 flen = strlen(field[i]);
2098 cp = strchr(field[i], '.');
2099
2100 /* Embedded decimal and no date yet? */
2101 if (cp != NULL && !(fmask & DTK_DATE_M))
2102 {
2103 if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
2104 return -1;
2105 }
2106 /* embedded decimal and several digits before? */
2107 else if (cp != NULL && flen - strlen(cp) > 2)
2108 {
2109 /*
2110 * Interpret as a concatenated date or time Set the
2111 * type field to allow decoding other fields later.
2112 * Example: 20011223 or 040506
2113 */
2114 if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2115 &tmask, tm, fsec, &is2digits)) < 0)
2116 return -1;
2117 }
2118 else if (flen > 4)
2119 {
2120 if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2121 &tmask, tm, fsec, &is2digits)) < 0)
2122 return -1;
2123 }
2124 /* otherwise it is a single date/time field... */
2125 else if (DecodeNumber(flen, field[i], fmask,
2126 &tmask, tm, fsec, &is2digits, EuroDates) != 0)
2127 return -1;
2128 }
2129 break;
2130
2131 case DTK_STRING:
2132 case DTK_SPECIAL:
2133 type = DecodeSpecial(i, field[i], &val);
2134 if (type == IGNORE_DTF)
2135 continue;
2136
2137 tmask = DTK_M(type);
2138 switch (type)
2139 {
2140 case RESERV:
2141 switch (val)
2142 {
2143 case DTK_NOW:
2144 tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
2145 *dtype = DTK_DATE;
2146 GetCurrentDateTime(tm);
2147 break;
2148
2149 case DTK_YESTERDAY:
2150 tmask = DTK_DATE_M;
2151 *dtype = DTK_DATE;
2152 GetCurrentDateTime(tm);
2153 j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - 1,
2154 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2155 tm->tm_hour = 0;
2156 tm->tm_min = 0;
2157 tm->tm_sec = 0;
2158 break;
2159
2160 case DTK_TODAY:
2161 tmask = DTK_DATE_M;
2162 *dtype = DTK_DATE;
2163 GetCurrentDateTime(tm);
2164 tm->tm_hour = 0;
2165 tm->tm_min = 0;
2166 tm->tm_sec = 0;
2167 break;
2168
2169 case DTK_TOMORROW:
2170 tmask = DTK_DATE_M;
2171 *dtype = DTK_DATE;
2172 GetCurrentDateTime(tm);
2173 j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) + 1,
2174 &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2175 tm->tm_hour = 0;
2176 tm->tm_min = 0;
2177 tm->tm_sec = 0;
2178 break;
2179
2180 case DTK_ZULU:
2181 tmask = (DTK_TIME_M | DTK_M(TZ));
2182 *dtype = DTK_DATE;
2183 tm->tm_hour = 0;
2184 tm->tm_min = 0;
2185 tm->tm_sec = 0;
2186 if (tzp != NULL)
2187 *tzp = 0;
2188 break;
2189
2190 default:
2191 *dtype = val;
2192 }
2193
2194 break;
2195
2196 case MONTH:
2197
2198 /*
2199 * already have a (numeric) month? then see if we can
2200 * substitute...
2201 */
2202 if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
2203 !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 && tm->tm_mon <= 31)
2204 {
2205 tm->tm_mday = tm->tm_mon;
2206 tmask = DTK_M(DAY);
2207 }
2208 haveTextMonth = TRUE;
2209 tm->tm_mon = val;
2210 break;
2211
2212 case DTZMOD:
2213
2214 /*
2215 * daylight savings time modifier (solves "MET DST"
2216 * syntax)
2217 */
2218 tmask |= DTK_M(DTZ);
2219 tm->tm_isdst = 1;
2220 if (tzp == NULL)
2221 return -1;
2222 *tzp -= val;
2223 break;
2224
2225 case DTZ:
2226
2227 /*
2228 * set mask for TZ here _or_ check for DTZ later when
2229 * getting default timezone
2230 */
2231 tmask |= DTK_M(TZ);
2232 tm->tm_isdst = 1;
2233 if (tzp == NULL)
2234 return -1;
2235 *tzp = -val;
2236 ftype[i] = DTK_TZ;
2237 break;
2238
2239 case TZ:
2240 tm->tm_isdst = 0;
2241 if (tzp == NULL)
2242 return -1;
2243 *tzp = -val;
2244 ftype[i] = DTK_TZ;
2245 break;
2246
2247 case IGNORE_DTF:
2248 break;
2249
2250 case AMPM:
2251 mer = val;
2252 break;
2253
2254 case ADBC:
2255 bc = (val == BC);
2256 break;
2257
2258 case DOW:
2259 tm->tm_wday = val;
2260 break;
2261
2262 case UNITS:
2263 tmask = 0;
2264 ptype = val;
2265 break;
2266
2267 case ISOTIME:
2268
2269 /*
2270 * This is a filler field "t" indicating that the next
2271 * field is time. Try to verify that this is sensible.
2272 */
2273 tmask = 0;
2274
2275 /* No preceding date? Then quit... */
2276 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2277 return -1;
2278
2279 /***
2280 * We will need one of the following fields:
2281 * DTK_NUMBER should be hhmmss.fff
2282 * DTK_TIME should be hh:mm:ss.fff
2283 * DTK_DATE should be hhmmss-zz
2284 ***/
2285 if (i >= nf - 1 ||
2286 (ftype[i + 1] != DTK_NUMBER &&
2287 ftype[i + 1] != DTK_TIME &&
2288 ftype[i + 1] != DTK_DATE))
2289 return -1;
2290
2291 ptype = val;
2292 break;
2293
2294 default:
2295 return -1;
2296 }
2297 break;
2298
2299 default:
2300 return -1;
2301 }
2302
2303 if (tmask & fmask)
2304 return -1;
2305 fmask |= tmask;
2306 }
2307
2308 /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
2309 if (bc)
2310 {
2311 if (tm->tm_year > 0)
2312 tm->tm_year = -(tm->tm_year - 1);
2313 else
2314 return -1;
2315 }
2316 else if (is2digits)
2317 {
2318 if (tm->tm_year < 70)
2319 tm->tm_year += 2000;
2320 else if (tm->tm_year < 100)
2321 tm->tm_year += 1900;
2322 }
2323
2324 if (mer != HR24 && tm->tm_hour > 12)
2325 return -1;
2326 if (mer == AM && tm->tm_hour == 12)
2327 tm->tm_hour = 0;
2328 else if (mer == PM && tm->tm_hour != 12)
2329 tm->tm_hour += 12;
2330
2331 /* do additional checking for full date specs... */
2332 if (*dtype == DTK_DATE)
2333 {
2334 if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2335 return ((fmask & DTK_TIME_M) == DTK_TIME_M) ? 1 : -1;
2336
2337 /*
2338 * check for valid day of month, now that we know for sure the month
2339 * and year...
2340 */
2341 if (tm->tm_mday < 1 || tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2342 return -1;
2343
2344 /*
2345 * backend tried to find local timezone here but we don't use the
2346 * result afterwards anyway so we only check for this error: daylight
2347 * savings time modifier but no standard timezone?
2348 */
2349 if ((fmask & DTK_DATE_M) == DTK_DATE_M && tzp != NULL && !(fmask & DTK_M(TZ)) && (fmask & DTK_M(DTZMOD)))
2350 return -1;
2351 }
2352
2353 return 0;
2354 } /* DecodeDateTime() */
2355
2356 /* Function works as follows:
2357 *
2358 *
2359 * */
2360
2361 static char *
find_end_token(char * str,char * fmt)2362 find_end_token(char *str, char *fmt)
2363 {
2364 /*
2365 * str: here is28the day12the hour fmt: here is%dthe day%hthe hour
2366 *
2367 * we extract the 28, we read the percent sign and the type "d" then this
2368 * functions gets called as find_end_token("28the day12the hour", "the
2369 * day%hthehour")
2370 *
2371 * fmt points to "the day%hthehour", next_percent points to %hthehour and
2372 * we have to find a match for everything between these positions ("the
2373 * day"). We look for "the day" in str and know that the pattern we are
2374 * about to scan ends where this string starts (right after the "28")
2375 *
2376 * At the end, *fmt is '\0' and *str isn't. end_position then is
2377 * unchanged.
2378 */
2379 char *end_position = NULL;
2380 char *next_percent,
2381 *subst_location = NULL;
2382 int scan_offset = 0;
2383 char last_char;
2384
2385 /* are we at the end? */
2386 if (!*fmt)
2387 {
2388 end_position = fmt;
2389 return end_position;
2390 }
2391
2392 /* not at the end */
2393 while (fmt[scan_offset] == '%' && fmt[scan_offset + 1])
2394 {
2395 /*
2396 * there is no delimiter, skip to the next delimiter if we're reading
2397 * a number and then something that is not a number "9:15pm", we might
2398 * be able to recover with the strtol end pointer. Go for the next
2399 * percent sign
2400 */
2401 scan_offset += 2;
2402 }
2403 next_percent = strchr(fmt + scan_offset, '%');
2404 if (next_percent)
2405 {
2406 /*
2407 * we don't want to allocate extra memory, so we temporarily set the
2408 * '%' sign to '\0' and call strstr However since we allow whitespace
2409 * to float around everything, we have to shorten the pattern until we
2410 * reach a non-whitespace character
2411 */
2412
2413 subst_location = next_percent;
2414 while (*(subst_location - 1) == ' ' && subst_location - 1 > fmt + scan_offset)
2415 subst_location--;
2416 last_char = *subst_location;
2417 *subst_location = '\0';
2418
2419 /*
2420 * the haystack is the str and the needle is the original fmt but it
2421 * ends at the position where the next percent sign would be
2422 */
2423
2424 /*
2425 * There is one special case. Imagine: str = " 2", fmt = "%d %...",
2426 * since we want to allow blanks as "dynamic" padding we have to
2427 * accept this. Now, we are called with a fmt of " %..." and look for
2428 * " " in str. We find it at the first position and never read the
2429 * 2...
2430 */
2431 while (*str == ' ')
2432 str++;
2433 end_position = strstr(str, fmt + scan_offset);
2434 *subst_location = last_char;
2435 }
2436 else
2437 {
2438 /*
2439 * there is no other percent sign. So everything up to the end has to
2440 * match.
2441 */
2442 end_position = str + strlen(str);
2443 }
2444 if (!end_position)
2445 {
2446 /*
2447 * maybe we have the following case:
2448 *
2449 * str = "4:15am" fmt = "%M:%S %p"
2450 *
2451 * at this place we could have
2452 *
2453 * str = "15am" fmt = " %p"
2454 *
2455 * and have set fmt to " " because overwrote the % sign with a NULL
2456 *
2457 * In this case where we would have to match a space but can't find
2458 * it, set end_position to the end of the string
2459 */
2460 if ((fmt + scan_offset)[0] == ' ' && fmt + scan_offset + 1 == subst_location)
2461 end_position = str + strlen(str);
2462 }
2463 return end_position;
2464 }
2465
2466 static int
pgtypes_defmt_scan(union un_fmt_comb * scan_val,int scan_type,char ** pstr,char * pfmt)2467 pgtypes_defmt_scan(union un_fmt_comb *scan_val, int scan_type, char **pstr, char *pfmt)
2468 {
2469 /*
2470 * scan everything between pstr and pstr_end. This is not including the
2471 * last character so we might set it to '\0' for the parsing
2472 */
2473
2474 char last_char;
2475 int err = 0;
2476 char *pstr_end;
2477 char *strtol_end = NULL;
2478
2479 while (**pstr == ' ')
2480 pstr++;
2481 pstr_end = find_end_token(*pstr, pfmt);
2482 if (!pstr_end)
2483 {
2484 /* there was an error, no match */
2485 return 1;
2486 }
2487 last_char = *pstr_end;
2488 *pstr_end = '\0';
2489
2490 switch (scan_type)
2491 {
2492 case PGTYPES_TYPE_UINT:
2493
2494 /*
2495 * numbers may be blank-padded, this is the only deviation from
2496 * the fmt-string we accept
2497 */
2498 while (**pstr == ' ')
2499 (*pstr)++;
2500 errno = 0;
2501 scan_val->uint_val = (unsigned int) strtol(*pstr, &strtol_end, 10);
2502 if (errno)
2503 err = 1;
2504 break;
2505 case PGTYPES_TYPE_UINT_LONG:
2506 while (**pstr == ' ')
2507 (*pstr)++;
2508 errno = 0;
2509 scan_val->luint_val = (unsigned long int) strtol(*pstr, &strtol_end, 10);
2510 if (errno)
2511 err = 1;
2512 break;
2513 case PGTYPES_TYPE_STRING_MALLOCED:
2514 scan_val->str_val = pgtypes_strdup(*pstr);
2515 if (scan_val->str_val == NULL)
2516 err = 1;
2517 break;
2518 }
2519 if (strtol_end && *strtol_end)
2520 *pstr = strtol_end;
2521 else
2522 *pstr = pstr_end;
2523 *pstr_end = last_char;
2524 return err;
2525 }
2526
2527 /* XXX range checking */
2528 int
PGTYPEStimestamp_defmt_scan(char ** str,char * fmt,timestamp * d,int * year,int * month,int * day,int * hour,int * minute,int * second,int * tz)2529 PGTYPEStimestamp_defmt_scan(char **str, char *fmt, timestamp * d,
2530 int *year, int *month, int *day,
2531 int *hour, int *minute, int *second,
2532 int *tz)
2533 {
2534 union un_fmt_comb scan_val;
2535 int scan_type;
2536
2537 char *pstr,
2538 *pfmt,
2539 *tmp;
2540 int err = 1;
2541 unsigned int j;
2542 struct tm tm;
2543
2544 pfmt = fmt;
2545 pstr = *str;
2546
2547 while (*pfmt)
2548 {
2549 err = 0;
2550 while (*pfmt == ' ')
2551 pfmt++;
2552 while (*pstr == ' ')
2553 pstr++;
2554 if (*pfmt != '%')
2555 {
2556 if (*pfmt == *pstr)
2557 {
2558 pfmt++;
2559 pstr++;
2560 }
2561 else
2562 {
2563 /* Error: no match */
2564 err = 1;
2565 return err;
2566 }
2567 continue;
2568 }
2569 /* here *pfmt equals '%' */
2570 pfmt++;
2571 switch (*pfmt)
2572 {
2573 case 'a':
2574 pfmt++;
2575
2576 /*
2577 * we parse the day and see if it is a week day but we do not
2578 * check if the week day really matches the date
2579 */
2580 err = 1;
2581 j = 0;
2582 while (pgtypes_date_weekdays_short[j])
2583 {
2584 if (strncmp(pgtypes_date_weekdays_short[j], pstr,
2585 strlen(pgtypes_date_weekdays_short[j])) == 0)
2586 {
2587 /* found it */
2588 err = 0;
2589 pstr += strlen(pgtypes_date_weekdays_short[j]);
2590 break;
2591 }
2592 j++;
2593 }
2594 break;
2595 case 'A':
2596 /* see note above */
2597 pfmt++;
2598 err = 1;
2599 j = 0;
2600 while (days[j])
2601 {
2602 if (strncmp(days[j], pstr, strlen(days[j])) == 0)
2603 {
2604 /* found it */
2605 err = 0;
2606 pstr += strlen(days[j]);
2607 break;
2608 }
2609 j++;
2610 }
2611 break;
2612 case 'b':
2613 case 'h':
2614 pfmt++;
2615 err = 1;
2616 j = 0;
2617 while (months[j])
2618 {
2619 if (strncmp(months[j], pstr, strlen(months[j])) == 0)
2620 {
2621 /* found it */
2622 err = 0;
2623 pstr += strlen(months[j]);
2624 *month = j + 1;
2625 break;
2626 }
2627 j++;
2628 }
2629 break;
2630 case 'B':
2631 /* see note above */
2632 pfmt++;
2633 err = 1;
2634 j = 0;
2635 while (pgtypes_date_months[j])
2636 {
2637 if (strncmp(pgtypes_date_months[j], pstr, strlen(pgtypes_date_months[j])) == 0)
2638 {
2639 /* found it */
2640 err = 0;
2641 pstr += strlen(pgtypes_date_months[j]);
2642 *month = j + 1;
2643 break;
2644 }
2645 j++;
2646 }
2647 break;
2648 case 'c':
2649 /* XXX */
2650 break;
2651 case 'C':
2652 pfmt++;
2653 scan_type = PGTYPES_TYPE_UINT;
2654 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2655 *year = scan_val.uint_val * 100;
2656 break;
2657 case 'd':
2658 case 'e':
2659 pfmt++;
2660 scan_type = PGTYPES_TYPE_UINT;
2661 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2662 *day = scan_val.uint_val;
2663 break;
2664 case 'D':
2665
2666 /*
2667 * we have to concatenate the strings in order to be able to
2668 * find the end of the substitution
2669 */
2670 pfmt++;
2671 tmp = pgtypes_alloc(strlen("%m/%d/%y") + strlen(pstr) + 1);
2672 strcpy(tmp, "%m/%d/%y");
2673 strcat(tmp, pfmt);
2674 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2675 free(tmp);
2676 return err;
2677 case 'm':
2678 pfmt++;
2679 scan_type = PGTYPES_TYPE_UINT;
2680 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2681 *month = scan_val.uint_val;
2682 break;
2683 case 'y':
2684 case 'g': /* XXX difference to y (ISO) */
2685 pfmt++;
2686 scan_type = PGTYPES_TYPE_UINT;
2687 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2688 if (*year < 0)
2689 {
2690 /* not yet set */
2691 *year = scan_val.uint_val;
2692 }
2693 else
2694 *year += scan_val.uint_val;
2695 if (*year < 100)
2696 *year += 1900;
2697 break;
2698 case 'G':
2699 /* XXX difference to %V (ISO) */
2700 pfmt++;
2701 scan_type = PGTYPES_TYPE_UINT;
2702 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2703 *year = scan_val.uint_val;
2704 break;
2705 case 'H':
2706 case 'I':
2707 case 'k':
2708 case 'l':
2709 pfmt++;
2710 scan_type = PGTYPES_TYPE_UINT;
2711 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2712 *hour += scan_val.uint_val;
2713 break;
2714 case 'j':
2715 pfmt++;
2716 scan_type = PGTYPES_TYPE_UINT;
2717 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2718
2719 /*
2720 * XXX what should we do with that? We could say that it's
2721 * sufficient if we have the year and the day within the year
2722 * to get at least a specific day.
2723 */
2724 break;
2725 case 'M':
2726 pfmt++;
2727 scan_type = PGTYPES_TYPE_UINT;
2728 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2729 *minute = scan_val.uint_val;
2730 break;
2731 case 'n':
2732 pfmt++;
2733 if (*pstr == '\n')
2734 pstr++;
2735 else
2736 err = 1;
2737 break;
2738 case 'p':
2739 err = 1;
2740 pfmt++;
2741 if (strncmp(pstr, "am", 2) == 0)
2742 {
2743 *hour += 0;
2744 err = 0;
2745 pstr += 2;
2746 }
2747 if (strncmp(pstr, "a.m.", 4) == 0)
2748 {
2749 *hour += 0;
2750 err = 0;
2751 pstr += 4;
2752 }
2753 if (strncmp(pstr, "pm", 2) == 0)
2754 {
2755 *hour += 12;
2756 err = 0;
2757 pstr += 2;
2758 }
2759 if (strncmp(pstr, "p.m.", 4) == 0)
2760 {
2761 *hour += 12;
2762 err = 0;
2763 pstr += 4;
2764 }
2765 break;
2766 case 'P':
2767 err = 1;
2768 pfmt++;
2769 if (strncmp(pstr, "AM", 2) == 0)
2770 {
2771 *hour += 0;
2772 err = 0;
2773 pstr += 2;
2774 }
2775 if (strncmp(pstr, "A.M.", 4) == 0)
2776 {
2777 *hour += 0;
2778 err = 0;
2779 pstr += 4;
2780 }
2781 if (strncmp(pstr, "PM", 2) == 0)
2782 {
2783 *hour += 12;
2784 err = 0;
2785 pstr += 2;
2786 }
2787 if (strncmp(pstr, "P.M.", 4) == 0)
2788 {
2789 *hour += 12;
2790 err = 0;
2791 pstr += 4;
2792 }
2793 break;
2794 case 'r':
2795 pfmt++;
2796 tmp = pgtypes_alloc(strlen("%I:%M:%S %p") + strlen(pstr) + 1);
2797 strcpy(tmp, "%I:%M:%S %p");
2798 strcat(tmp, pfmt);
2799 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2800 free(tmp);
2801 return err;
2802 case 'R':
2803 pfmt++;
2804 tmp = pgtypes_alloc(strlen("%H:%M") + strlen(pstr) + 1);
2805 strcpy(tmp, "%H:%M");
2806 strcat(tmp, pfmt);
2807 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2808 free(tmp);
2809 return err;
2810 case 's':
2811 pfmt++;
2812 scan_type = PGTYPES_TYPE_UINT_LONG;
2813 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2814 /* number of seconds in scan_val.luint_val */
2815 {
2816 struct tm *tms;
2817 time_t et = (time_t) scan_val.luint_val;
2818
2819 tms = gmtime(&et);
2820
2821 if (tms)
2822 {
2823 *year = tms->tm_year + 1900;
2824 *month = tms->tm_mon + 1;
2825 *day = tms->tm_mday;
2826 *hour = tms->tm_hour;
2827 *minute = tms->tm_min;
2828 *second = tms->tm_sec;
2829 }
2830 else
2831 err = 1;
2832 }
2833 break;
2834 case 'S':
2835 pfmt++;
2836 scan_type = PGTYPES_TYPE_UINT;
2837 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2838 *second = scan_val.uint_val;
2839 break;
2840 case 't':
2841 pfmt++;
2842 if (*pstr == '\t')
2843 pstr++;
2844 else
2845 err = 1;
2846 break;
2847 case 'T':
2848 pfmt++;
2849 tmp = pgtypes_alloc(strlen("%H:%M:%S") + strlen(pstr) + 1);
2850 strcpy(tmp, "%H:%M:%S");
2851 strcat(tmp, pfmt);
2852 err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2853 free(tmp);
2854 return err;
2855 case 'u':
2856 pfmt++;
2857 scan_type = PGTYPES_TYPE_UINT;
2858 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2859 if (scan_val.uint_val < 1 || scan_val.uint_val > 7)
2860 err = 1;
2861 break;
2862 case 'U':
2863 pfmt++;
2864 scan_type = PGTYPES_TYPE_UINT;
2865 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2866 if (scan_val.uint_val > 53)
2867 err = 1;
2868 break;
2869 case 'V':
2870 pfmt++;
2871 scan_type = PGTYPES_TYPE_UINT;
2872 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2873 if (scan_val.uint_val < 1 || scan_val.uint_val > 53)
2874 err = 1;
2875 break;
2876 case 'w':
2877 pfmt++;
2878 scan_type = PGTYPES_TYPE_UINT;
2879 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2880 if (scan_val.uint_val > 6)
2881 err = 1;
2882 break;
2883 case 'W':
2884 pfmt++;
2885 scan_type = PGTYPES_TYPE_UINT;
2886 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2887 if (scan_val.uint_val > 53)
2888 err = 1;
2889 break;
2890 case 'x':
2891 case 'X':
2892 /* XXX */
2893 break;
2894 case 'Y':
2895 pfmt++;
2896 scan_type = PGTYPES_TYPE_UINT;
2897 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2898 *year = scan_val.uint_val;
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 err = DecodeTimezone(scan_val.str_val, tz);
2907 free(scan_val.str_val);
2908 }
2909 break;
2910 case 'Z':
2911 pfmt++;
2912 scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2913 err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2914 if (!err)
2915 {
2916 /*
2917 * XXX use DecodeSpecial instead? Do we need strcasecmp
2918 * here?
2919 */
2920 err = 1;
2921 for (j = 0; j < szdatetktbl; j++)
2922 {
2923 if ((datetktbl[j].type == TZ || datetktbl[j].type == DTZ) &&
2924 pg_strcasecmp(datetktbl[j].token,
2925 scan_val.str_val) == 0)
2926 {
2927 *tz = -datetktbl[j].value;
2928 err = 0;
2929 break;
2930 }
2931 }
2932 free(scan_val.str_val);
2933 }
2934 break;
2935 case '+':
2936 /* XXX */
2937 break;
2938 case '%':
2939 pfmt++;
2940 if (*pstr == '%')
2941 pstr++;
2942 else
2943 err = 1;
2944 break;
2945 default:
2946 err = 1;
2947 }
2948 }
2949 if (!err)
2950 {
2951 if (*second < 0)
2952 *second = 0;
2953 if (*minute < 0)
2954 *minute = 0;
2955 if (*hour < 0)
2956 *hour = 0;
2957 if (*day < 0)
2958 {
2959 err = 1;
2960 *day = 1;
2961 }
2962 if (*month < 0)
2963 {
2964 err = 1;
2965 *month = 1;
2966 }
2967 if (*year < 0)
2968 {
2969 err = 1;
2970 *year = 1970;
2971 }
2972
2973 if (*second > 59)
2974 {
2975 err = 1;
2976 *second = 0;
2977 }
2978 if (*minute > 59)
2979 {
2980 err = 1;
2981 *minute = 0;
2982 }
2983 if (*hour > 24 || /* test for > 24:00:00 */
2984 (*hour == 24 && (*minute > 0 || *second > 0)))
2985 {
2986 err = 1;
2987 *hour = 0;
2988 }
2989 if (*month > MONTHS_PER_YEAR)
2990 {
2991 err = 1;
2992 *month = 1;
2993 }
2994 if (*day > day_tab[isleap(*year)][*month - 1])
2995 {
2996 *day = day_tab[isleap(*year)][*month - 1];
2997 err = 1;
2998 }
2999
3000 tm.tm_sec = *second;
3001 tm.tm_min = *minute;
3002 tm.tm_hour = *hour;
3003 tm.tm_mday = *day;
3004 tm.tm_mon = *month;
3005 tm.tm_year = *year;
3006
3007 tm2timestamp(&tm, 0, tz, d);
3008 }
3009 return err;
3010 }
3011
3012 /* XXX: 1900 is compiled in as the base for years */
3013