PostgreSQL Source Code  git master
dt_common.c
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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 datebsearch(const char *key, const datetkn *base, unsigned int nel)
503 {
504  if (nel > 0)
505  {
506  const datetkn *last = base + nel - 1,
507  *position;
508  int result;
509 
510  while (last >= base)
511  {
512  position = base + ((last - base) >> 1);
513  /* precheck the first character for a bit of extra speed */
514  result = (int) key[0] - (int) position->token[0];
515  if (result == 0)
516  {
517  /* use strncmp so that we match truncated tokens */
518  result = strncmp(key, position->token, TOKMAXLEN);
519  if (result == 0)
520  return position;
521  }
522  if (result < 0)
523  last = position - 1;
524  else
525  base = position + 1;
526  }
527  }
528  return NULL;
529 }
530 
531 /* DecodeUnits()
532  * Decode text string using lookup table.
533  * This routine supports time interval decoding.
534  */
535 int
536 DecodeUnits(int field, char *lowtoken, int *val)
537 {
538  int type;
539  const datetkn *tp;
540 
541  /* use strncmp so that we match truncated tokens */
542  if (deltacache[field] != NULL &&
543  strncmp(lowtoken, deltacache[field]->token, TOKMAXLEN) == 0)
544  tp = deltacache[field];
545  else
546  tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
547  deltacache[field] = tp;
548  if (tp == NULL)
549  {
550  type = UNKNOWN_FIELD;
551  *val = 0;
552  }
553  else
554  {
555  type = tp->type;
556  *val = tp->value;
557  }
558 
559  return type;
560 } /* DecodeUnits() */
561 
562 /*
563  * Calendar time to Julian date conversions.
564  * Julian date is commonly used in astronomical applications,
565  * since it is numerically accurate and computationally simple.
566  * The algorithms here will accurately convert between Julian day
567  * and calendar date for all non-negative Julian days
568  * (i.e. from Nov 24, -4713 on).
569  *
570  * These routines will be used by other date/time packages
571  * - thomas 97/02/25
572  *
573  * Rewritten to eliminate overflow problems. This now allows the
574  * routines to work correctly for all Julian day counts from
575  * 0 to 2147483647 (Nov 24, -4713 to Jun 3, 5874898) assuming
576  * a 32-bit integer. Longer types should also work to the limits
577  * of their precision.
578  */
579 
580 int
581 date2j(int y, int m, int d)
582 {
583  int julian;
584  int century;
585 
586  if (m > 2)
587  {
588  m += 1;
589  y += 4800;
590  }
591  else
592  {
593  m += 13;
594  y += 4799;
595  }
596 
597  century = y / 100;
598  julian = y * 365 - 32167;
599  julian += y / 4 - century + century / 4;
600  julian += 7834 * m / 256 + d;
601 
602  return julian;
603 } /* date2j() */
604 
605 void
606 j2date(int jd, int *year, int *month, int *day)
607 {
608  unsigned int julian;
609  unsigned int quad;
610  unsigned int extra;
611  int y;
612 
613  julian = jd;
614  julian += 32044;
615  quad = julian / 146097;
616  extra = (julian - quad * 146097) * 4 + 3;
617  julian += 60 + quad * 3 + extra / 146097;
618  quad = julian / 1461;
619  julian -= quad * 1461;
620  y = julian * 4 / 1461;
621  julian = ((y != 0) ? (julian + 305) % 365 : (julian + 306) % 366) + 123;
622  y += quad * 4;
623  *year = y - 4800;
624  quad = julian * 2141 / 65536;
625  *day = julian - 7834 * quad / 256;
626  *month = (quad + 10) % 12 + 1;
627 } /* j2date() */
628 
629 /* DecodeSpecial()
630  * Decode text string using lookup table.
631  * Implement a cache lookup since it is likely that dates
632  * will be related in format.
633  */
634 static int
635 DecodeSpecial(int field, char *lowtoken, int *val)
636 {
637  int type;
638  const datetkn *tp;
639 
640  /* use strncmp so that we match truncated tokens */
641  if (datecache[field] != NULL &&
642  strncmp(lowtoken, datecache[field]->token, TOKMAXLEN) == 0)
643  tp = datecache[field];
644  else
645  {
646  tp = NULL;
647  if (!tp)
648  tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
649  }
650  datecache[field] = tp;
651  if (tp == NULL)
652  {
653  type = UNKNOWN_FIELD;
654  *val = 0;
655  }
656  else
657  {
658  type = tp->type;
659  *val = tp->value;
660  }
661 
662  return type;
663 } /* DecodeSpecial() */
664 
665 /* EncodeDateOnly()
666  * Encode date as local time.
667  */
668 void
669 EncodeDateOnly(struct tm *tm, int style, char *str, bool EuroDates)
670 {
671  Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
672 
673  switch (style)
674  {
675  case USE_ISO_DATES:
676  /* compatible with ISO date formats */
677  if (tm->tm_year > 0)
678  sprintf(str, "%04d-%02d-%02d",
679  tm->tm_year, tm->tm_mon, tm->tm_mday);
680  else
681  sprintf(str, "%04d-%02d-%02d %s",
682  -(tm->tm_year - 1), tm->tm_mon, tm->tm_mday, "BC");
683  break;
684 
685  case USE_SQL_DATES:
686  /* compatible with Oracle/Ingres date formats */
687  if (EuroDates)
688  sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
689  else
690  sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
691  if (tm->tm_year > 0)
692  sprintf(str + 5, "/%04d", tm->tm_year);
693  else
694  sprintf(str + 5, "/%04d %s", -(tm->tm_year - 1), "BC");
695  break;
696 
697  case USE_GERMAN_DATES:
698  /* German-style date format */
699  sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
700  if (tm->tm_year > 0)
701  sprintf(str + 5, ".%04d", tm->tm_year);
702  else
703  sprintf(str + 5, ".%04d %s", -(tm->tm_year - 1), "BC");
704  break;
705 
706  case USE_POSTGRES_DATES:
707  default:
708  /* traditional date-only style for Postgres */
709  if (EuroDates)
710  sprintf(str, "%02d-%02d", tm->tm_mday, tm->tm_mon);
711  else
712  sprintf(str, "%02d-%02d", tm->tm_mon, tm->tm_mday);
713  if (tm->tm_year > 0)
714  sprintf(str + 5, "-%04d", tm->tm_year);
715  else
716  sprintf(str + 5, "-%04d %s", -(tm->tm_year - 1), "BC");
717  break;
718  }
719 }
720 
721 void
722 TrimTrailingZeros(char *str)
723 {
724  int len = strlen(str);
725 
726  /* chop off trailing zeros... but leave at least 2 fractional digits */
727  while (*(str + len - 1) == '0' && *(str + len - 3) != '.')
728  {
729  len--;
730  *(str + len) = '\0';
731  }
732 }
733 
734 /* EncodeDateTime()
735  * Encode date and time interpreted as local time.
736  *
737  * tm and fsec are the value to encode, print_tz determines whether to include
738  * a time zone (the difference between timestamp and timestamptz types), tz is
739  * the numeric time zone offset, tzn is the textual time zone, which if
740  * specified will be used instead of tz by some styles, style is the date
741  * style, str is where to write the output.
742  *
743  * Supported date styles:
744  * Postgres - day mon hh:mm:ss yyyy tz
745  * SQL - mm/dd/yyyy hh:mm:ss.ss tz
746  * ISO - yyyy-mm-dd hh:mm:ss+/-tz
747  * German - dd.mm.yyyy hh:mm:ss tz
748  * Variants (affects order of month and day for Postgres and SQL styles):
749  * US - mm/dd/yyyy
750  * European - dd/mm/yyyy
751  */
752 void
753 EncodeDateTime(struct tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str, bool EuroDates)
754 {
755  int day,
756  hour,
757  min;
758 
759  /*
760  * Negative tm_isdst means we have no valid time zone translation.
761  */
762  if (tm->tm_isdst < 0)
763  print_tz = false;
764 
765  switch (style)
766  {
767  case USE_ISO_DATES:
768  /* Compatible with ISO-8601 date formats */
769 
770  sprintf(str, "%04d-%02d-%02d %02d:%02d",
771  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
772  tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min);
773 
774  /*
775  * Print fractional seconds if any. The field widths here should
776  * be at least equal to MAX_TIMESTAMP_PRECISION.
777  */
778  if (fsec != 0)
779  {
780  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
781  TrimTrailingZeros(str);
782  }
783  else
784  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
785 
786  if (tm->tm_year <= 0)
787  sprintf(str + strlen(str), " BC");
788 
789  if (print_tz)
790  {
791  hour = -(tz / SECS_PER_HOUR);
792  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
793  if (min != 0)
794  sprintf(str + strlen(str), "%+03d:%02d", hour, min);
795  else
796  sprintf(str + strlen(str), "%+03d", hour);
797  }
798  break;
799 
800  case USE_SQL_DATES:
801  /* Compatible with Oracle/Ingres date formats */
802 
803  if (EuroDates)
804  sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
805  else
806  sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
807 
808  sprintf(str + 5, "/%04d %02d:%02d",
809  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
810  tm->tm_hour, tm->tm_min);
811 
812  /*
813  * Print fractional seconds if any. The field widths here should
814  * be at least equal to MAX_TIMESTAMP_PRECISION.
815  */
816  if (fsec != 0)
817  {
818  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
819  TrimTrailingZeros(str);
820  }
821  else
822  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
823 
824  if (tm->tm_year <= 0)
825  sprintf(str + strlen(str), " BC");
826 
827  /*
828  * Note: the uses of %.*s in this function would be risky if the
829  * timezone names ever contain non-ASCII characters, since we are
830  * not being careful to do encoding-aware clipping. However, all
831  * TZ abbreviations in the IANA database are plain ASCII.
832  */
833 
834  if (print_tz)
835  {
836  if (tzn)
837  sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
838  else
839  {
840  hour = -(tz / SECS_PER_HOUR);
841  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
842  if (min != 0)
843  sprintf(str + strlen(str), "%+03d:%02d", hour, min);
844  else
845  sprintf(str + strlen(str), "%+03d", hour);
846  }
847  }
848  break;
849 
850  case USE_GERMAN_DATES:
851  /* German variant on European style */
852 
853  sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
854 
855  sprintf(str + 5, ".%04d %02d:%02d",
856  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1),
857  tm->tm_hour, tm->tm_min);
858 
859  /*
860  * Print fractional seconds if any. The field widths here should
861  * be at least equal to MAX_TIMESTAMP_PRECISION.
862  */
863  if (fsec != 0)
864  {
865  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
866  TrimTrailingZeros(str);
867  }
868  else
869  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
870 
871  if (tm->tm_year <= 0)
872  sprintf(str + strlen(str), " BC");
873 
874  if (print_tz)
875  {
876  if (tzn)
877  sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
878  else
879  {
880  hour = -(tz / SECS_PER_HOUR);
881  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
882  if (min != 0)
883  sprintf(str + strlen(str), "%+03d:%02d", hour, min);
884  else
885  sprintf(str + strlen(str), "%+03d", hour);
886  }
887  }
888  break;
889 
890  case USE_POSTGRES_DATES:
891  default:
892  /* Backward-compatible with traditional Postgres abstime dates */
893 
894  day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
895  tm->tm_wday = (int) ((day + date2j(2000, 1, 1) + 1) % 7);
896 
897  memcpy(str, days[tm->tm_wday], 3);
898  strcpy(str + 3, " ");
899 
900  if (EuroDates)
901  sprintf(str + 4, "%02d %3s", tm->tm_mday, months[tm->tm_mon - 1]);
902  else
903  sprintf(str + 4, "%3s %02d", months[tm->tm_mon - 1], tm->tm_mday);
904 
905  sprintf(str + 10, " %02d:%02d", tm->tm_hour, tm->tm_min);
906 
907  /*
908  * Print fractional seconds if any. The field widths here should
909  * be at least equal to MAX_TIMESTAMP_PRECISION.
910  */
911  if (fsec != 0)
912  {
913  sprintf(str + strlen(str), ":%02d.%06d", tm->tm_sec, fsec);
914  TrimTrailingZeros(str);
915  }
916  else
917  sprintf(str + strlen(str), ":%02d", tm->tm_sec);
918 
919  sprintf(str + strlen(str), " %04d",
920  (tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1));
921  if (tm->tm_year <= 0)
922  sprintf(str + strlen(str), " BC");
923 
924  if (print_tz)
925  {
926  if (tzn)
927  sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
928  else
929  {
930  /*
931  * We have a time zone, but no string version. Use the
932  * numeric form, but be sure to include a leading space to
933  * avoid formatting something which would be rejected by
934  * the date/time parser later. - thomas 2001-10-19
935  */
936  hour = -(tz / SECS_PER_HOUR);
937  min = (abs(tz) / MINS_PER_HOUR) % MINS_PER_HOUR;
938  if (min != 0)
939  sprintf(str + strlen(str), " %+03d:%02d", hour, min);
940  else
941  sprintf(str + strlen(str), " %+03d", hour);
942  }
943  }
944  break;
945  }
946 }
947 
948 int
949 GetEpochTime(struct tm *tm)
950 {
951  struct tm *t0;
952  struct tm tmbuf;
953  time_t epoch = 0;
954 
955  t0 = gmtime_r(&epoch, &tmbuf);
956 
957  if (t0)
958  {
959  tm->tm_year = t0->tm_year + 1900;
960  tm->tm_mon = t0->tm_mon + 1;
961  tm->tm_mday = t0->tm_mday;
962  tm->tm_hour = t0->tm_hour;
963  tm->tm_min = t0->tm_min;
964  tm->tm_sec = t0->tm_sec;
965 
966  return 0;
967  }
968 
969  return -1;
970 } /* GetEpochTime() */
971 
972 static void
973 abstime2tm(AbsoluteTime _time, int *tzp, struct tm *tm, char **tzn)
974 {
975  time_t time = (time_t) _time;
976  struct tm *tx;
977  struct tm tmbuf;
978 
979  errno = 0;
980  if (tzp != NULL)
981  tx = localtime_r(&time, &tmbuf);
982  else
983  tx = gmtime_r(&time, &tmbuf);
984 
985  if (!tx)
986  {
987  errno = PGTYPES_TS_BAD_TIMESTAMP;
988  return;
989  }
990 
991  tm->tm_year = tx->tm_year + 1900;
992  tm->tm_mon = tx->tm_mon + 1;
993  tm->tm_mday = tx->tm_mday;
994  tm->tm_hour = tx->tm_hour;
995  tm->tm_min = tx->tm_min;
996  tm->tm_sec = tx->tm_sec;
997  tm->tm_isdst = tx->tm_isdst;
998 
999 #if defined(HAVE_STRUCT_TM_TM_ZONE)
1000  tm->tm_gmtoff = tx->tm_gmtoff;
1001  tm->tm_zone = tx->tm_zone;
1002 
1003  if (tzp != NULL)
1004  {
1005  /*
1006  * We have a brute force time zone per SQL99? Then use it without
1007  * change since we have already rotated to the time zone.
1008  */
1009  *tzp = -tm->tm_gmtoff; /* tm_gmtoff is Sun/DEC-ism */
1010 
1011  /*
1012  * FreeBSD man pages indicate that this should work - tgl 97/04/23
1013  */
1014  if (tzn != NULL)
1015  {
1016  /*
1017  * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1018  * contains an error message, which doesn't fit in the buffer
1019  */
1020  strlcpy(*tzn, tm->tm_zone, MAXTZLEN + 1);
1021  if (strlen(tm->tm_zone) > MAXTZLEN)
1022  tm->tm_isdst = -1;
1023  }
1024  }
1025  else
1026  tm->tm_isdst = -1;
1027 #elif defined(HAVE_INT_TIMEZONE)
1028  if (tzp != NULL)
1029  {
1030  *tzp = (tm->tm_isdst > 0) ? TIMEZONE_GLOBAL - SECS_PER_HOUR : TIMEZONE_GLOBAL;
1031 
1032  if (tzn != NULL)
1033  {
1034  /*
1035  * Copy no more than MAXTZLEN bytes of timezone to tzn, in case it
1036  * contains an error message, which doesn't fit in the buffer
1037  */
1038  strlcpy(*tzn, TZNAME_GLOBAL[tm->tm_isdst], MAXTZLEN + 1);
1039  if (strlen(TZNAME_GLOBAL[tm->tm_isdst]) > MAXTZLEN)
1040  tm->tm_isdst = -1;
1041  }
1042  }
1043  else
1044  tm->tm_isdst = -1;
1045 #else /* not (HAVE_STRUCT_TM_TM_ZONE ||
1046  * HAVE_INT_TIMEZONE) */
1047  if (tzp != NULL)
1048  {
1049  /* default to UTC */
1050  *tzp = 0;
1051  if (tzn != NULL)
1052  *tzn = NULL;
1053  }
1054  else
1055  tm->tm_isdst = -1;
1056 #endif
1057 }
1058 
1059 void
1060 GetCurrentDateTime(struct tm *tm)
1061 {
1062  int tz;
1063 
1064  abstime2tm(time(NULL), &tz, tm, NULL);
1065 }
1066 
1067 void
1068 dt2time(double jd, int *hour, int *min, int *sec, fsec_t *fsec)
1069 {
1070  int64 time;
1071 
1072  time = jd;
1073  *hour = time / USECS_PER_HOUR;
1074  time -= (*hour) * USECS_PER_HOUR;
1075  *min = time / USECS_PER_MINUTE;
1076  time -= (*min) * USECS_PER_MINUTE;
1077  *sec = time / USECS_PER_SEC;
1078  *fsec = time - (*sec * USECS_PER_SEC);
1079 } /* dt2time() */
1080 
1081 
1082 
1083 /* DecodeNumberField()
1084  * Interpret numeric string as a concatenated date or time field.
1085  * Use the context of previously decoded fields to help with
1086  * the interpretation.
1087  */
1088 static int
1089 DecodeNumberField(int len, char *str, int fmask,
1090  int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits)
1091 {
1092  char *cp;
1093 
1094  /*
1095  * Have a decimal point? Then this is a date or something with a seconds
1096  * field...
1097  */
1098  if ((cp = strchr(str, '.')) != NULL)
1099  {
1100  char fstr[7];
1101  int i;
1102 
1103  cp++;
1104 
1105  /*
1106  * OK, we have at most six digits to care about. Let's construct a
1107  * string with those digits, zero-padded on the right, and then do the
1108  * conversion to an integer.
1109  *
1110  * XXX This truncates the seventh digit, unlike rounding it as the
1111  * backend does.
1112  */
1113  for (i = 0; i < 6; i++)
1114  fstr[i] = *cp != '\0' ? *cp++ : '0';
1115  fstr[i] = '\0';
1116  *fsec = strtoint(fstr, NULL, 10);
1117  *cp = '\0';
1118  len = strlen(str);
1119  }
1120  /* No decimal point and no complete date yet? */
1121  else if ((fmask & DTK_DATE_M) != DTK_DATE_M)
1122  {
1123  /* yyyymmdd? */
1124  if (len == 8)
1125  {
1126  *tmask = DTK_DATE_M;
1127 
1128  tm->tm_mday = atoi(str + 6);
1129  *(str + 6) = '\0';
1130  tm->tm_mon = atoi(str + 4);
1131  *(str + 4) = '\0';
1132  tm->tm_year = atoi(str + 0);
1133 
1134  return DTK_DATE;
1135  }
1136  /* yymmdd? */
1137  else if (len == 6)
1138  {
1139  *tmask = DTK_DATE_M;
1140  tm->tm_mday = atoi(str + 4);
1141  *(str + 4) = '\0';
1142  tm->tm_mon = atoi(str + 2);
1143  *(str + 2) = '\0';
1144  tm->tm_year = atoi(str + 0);
1145  *is2digits = true;
1146 
1147  return DTK_DATE;
1148  }
1149  /* yyddd? */
1150  else if (len == 5)
1151  {
1152  *tmask = DTK_DATE_M;
1153  tm->tm_mday = atoi(str + 2);
1154  *(str + 2) = '\0';
1155  tm->tm_mon = 1;
1156  tm->tm_year = atoi(str + 0);
1157  *is2digits = true;
1158 
1159  return DTK_DATE;
1160  }
1161  }
1162 
1163  /* not all time fields are specified? */
1164  if ((fmask & DTK_TIME_M) != DTK_TIME_M)
1165  {
1166  /* hhmmss */
1167  if (len == 6)
1168  {
1169  *tmask = DTK_TIME_M;
1170  tm->tm_sec = atoi(str + 4);
1171  *(str + 4) = '\0';
1172  tm->tm_min = atoi(str + 2);
1173  *(str + 2) = '\0';
1174  tm->tm_hour = atoi(str + 0);
1175 
1176  return DTK_TIME;
1177  }
1178  /* hhmm? */
1179  else if (len == 4)
1180  {
1181  *tmask = DTK_TIME_M;
1182  tm->tm_sec = 0;
1183  tm->tm_min = atoi(str + 2);
1184  *(str + 2) = '\0';
1185  tm->tm_hour = atoi(str + 0);
1186 
1187  return DTK_TIME;
1188  }
1189  }
1190 
1191  return -1;
1192 } /* DecodeNumberField() */
1193 
1194 
1195 /* DecodeNumber()
1196  * Interpret plain numeric field as a date value in context.
1197  */
1198 static int
1199 DecodeNumber(int flen, char *str, int fmask,
1200  int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits, bool EuroDates)
1201 {
1202  int val;
1203  char *cp;
1204 
1205  *tmask = 0;
1206 
1207  val = strtoint(str, &cp, 10);
1208  if (cp == str)
1209  return -1;
1210 
1211  if (*cp == '.')
1212  {
1213  /*
1214  * More than two digits? Then could be a date or a run-together time:
1215  * 2001.360 20011225 040506.789
1216  */
1217  if (cp - str > 2)
1218  return DecodeNumberField(flen, str, (fmask | DTK_DATE_M),
1219  tmask, tm, fsec, is2digits);
1220 
1221  *fsec = strtod(cp, &cp);
1222  if (*cp != '\0')
1223  return -1;
1224  }
1225  else if (*cp != '\0')
1226  return -1;
1227 
1228  /* Special case day of year? */
1229  if (flen == 3 && (fmask & DTK_M(YEAR)) && val >= 1 && val <= 366)
1230  {
1231  *tmask = (DTK_M(DOY) | DTK_M(MONTH) | DTK_M(DAY));
1232  tm->tm_yday = val;
1233  j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
1234  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1235  }
1236 
1237  /***
1238  * Enough digits to be unequivocal year? Used to test for 4 digits or
1239  * more, but we now test first for a three-digit doy so anything
1240  * bigger than two digits had better be an explicit year.
1241  * - thomas 1999-01-09
1242  * Back to requiring a 4 digit year. We accept a two digit
1243  * year farther down. - thomas 2000-03-28
1244  ***/
1245  else if (flen >= 4)
1246  {
1247  *tmask = DTK_M(YEAR);
1248 
1249  /* already have a year? then see if we can substitute... */
1250  if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1251  tm->tm_year >= 1 && tm->tm_year <= 31)
1252  {
1253  tm->tm_mday = tm->tm_year;
1254  *tmask = DTK_M(DAY);
1255  }
1256 
1257  tm->tm_year = val;
1258  }
1259 
1260  /* already have year? then could be month */
1261  else if ((fmask & DTK_M(YEAR)) && !(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1262  {
1263  *tmask = DTK_M(MONTH);
1264  tm->tm_mon = val;
1265  }
1266  /* no year and EuroDates enabled? then could be day */
1267  else if ((EuroDates || (fmask & DTK_M(MONTH))) &&
1268  !(fmask & DTK_M(YEAR)) && !(fmask & DTK_M(DAY)) &&
1269  val >= 1 && val <= 31)
1270  {
1271  *tmask = DTK_M(DAY);
1272  tm->tm_mday = val;
1273  }
1274  else if (!(fmask & DTK_M(MONTH)) && val >= 1 && val <= MONTHS_PER_YEAR)
1275  {
1276  *tmask = DTK_M(MONTH);
1277  tm->tm_mon = val;
1278  }
1279  else if (!(fmask & DTK_M(DAY)) && val >= 1 && val <= 31)
1280  {
1281  *tmask = DTK_M(DAY);
1282  tm->tm_mday = val;
1283  }
1284 
1285  /*
1286  * Check for 2 or 4 or more digits, but currently we reach here only if
1287  * two digits. - thomas 2000-03-28
1288  */
1289  else if (!(fmask & DTK_M(YEAR)) && (flen >= 4 || flen == 2))
1290  {
1291  *tmask = DTK_M(YEAR);
1292  tm->tm_year = val;
1293 
1294  /* adjust ONLY if exactly two digits... */
1295  *is2digits = (flen == 2);
1296  }
1297  else
1298  return -1;
1299 
1300  return 0;
1301 } /* DecodeNumber() */
1302 
1303 /* DecodeDate()
1304  * Decode date string which includes delimiters.
1305  * Insist on a complete set of fields.
1306  */
1307 static int
1308 DecodeDate(char *str, int fmask, int *tmask, struct tm *tm, bool EuroDates)
1309 {
1310  fsec_t fsec;
1311 
1312  int nf = 0;
1313  int i,
1314  len;
1315  bool bc = false;
1316  bool is2digits = false;
1317  int type,
1318  val,
1319  dmask = 0;
1320  char *field[MAXDATEFIELDS];
1321 
1322  /* parse this string... */
1323  while (*str != '\0' && nf < MAXDATEFIELDS)
1324  {
1325  /* skip field separators */
1326  while (!isalnum((unsigned char) *str))
1327  str++;
1328 
1329  field[nf] = str;
1330  if (isdigit((unsigned char) *str))
1331  {
1332  while (isdigit((unsigned char) *str))
1333  str++;
1334  }
1335  else if (isalpha((unsigned char) *str))
1336  {
1337  while (isalpha((unsigned char) *str))
1338  str++;
1339  }
1340 
1341  /* Just get rid of any non-digit, non-alpha characters... */
1342  if (*str != '\0')
1343  *str++ = '\0';
1344  nf++;
1345  }
1346 
1347 #if 0
1348  /* don't allow too many fields */
1349  if (nf > 3)
1350  return -1;
1351 #endif
1352 
1353  *tmask = 0;
1354 
1355  /* look first for text fields, since that will be unambiguous month */
1356  for (i = 0; i < nf; i++)
1357  {
1358  if (isalpha((unsigned char) *field[i]))
1359  {
1360  type = DecodeSpecial(i, field[i], &val);
1361  if (type == IGNORE_DTF)
1362  continue;
1363 
1364  dmask = DTK_M(type);
1365  switch (type)
1366  {
1367  case MONTH:
1368  tm->tm_mon = val;
1369  break;
1370 
1371  case ADBC:
1372  bc = (val == BC);
1373  break;
1374 
1375  default:
1376  return -1;
1377  }
1378  if (fmask & dmask)
1379  return -1;
1380 
1381  fmask |= dmask;
1382  *tmask |= dmask;
1383 
1384  /* mark this field as being completed */
1385  field[i] = NULL;
1386  }
1387  }
1388 
1389  /* now pick up remaining numeric fields */
1390  for (i = 0; i < nf; i++)
1391  {
1392  if (field[i] == NULL)
1393  continue;
1394 
1395  if ((len = strlen(field[i])) <= 0)
1396  return -1;
1397 
1398  if (DecodeNumber(len, field[i], fmask, &dmask, tm, &fsec, &is2digits, EuroDates) != 0)
1399  return -1;
1400 
1401  if (fmask & dmask)
1402  return -1;
1403 
1404  fmask |= dmask;
1405  *tmask |= dmask;
1406  }
1407 
1408  if ((fmask & ~(DTK_M(DOY) | DTK_M(TZ))) != DTK_DATE_M)
1409  return -1;
1410 
1411  /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
1412  if (bc)
1413  {
1414  if (tm->tm_year > 0)
1415  tm->tm_year = -(tm->tm_year - 1);
1416  else
1417  return -1;
1418  }
1419  else if (is2digits)
1420  {
1421  if (tm->tm_year < 70)
1422  tm->tm_year += 2000;
1423  else if (tm->tm_year < 100)
1424  tm->tm_year += 1900;
1425  }
1426 
1427  return 0;
1428 } /* DecodeDate() */
1429 
1430 
1431 /* DecodeTime()
1432  * Decode time string which includes delimiters.
1433  * Only check the lower limit on hours, since this same code
1434  * can be used to represent time spans.
1435  */
1436 int
1437 DecodeTime(char *str, int *tmask, struct tm *tm, fsec_t *fsec)
1438 {
1439  char *cp;
1440 
1441  *tmask = DTK_TIME_M;
1442 
1443  tm->tm_hour = strtoint(str, &cp, 10);
1444  if (*cp != ':')
1445  return -1;
1446  str = cp + 1;
1447  tm->tm_min = strtoint(str, &cp, 10);
1448  if (*cp == '\0')
1449  {
1450  tm->tm_sec = 0;
1451  *fsec = 0;
1452  }
1453  else if (*cp != ':')
1454  return -1;
1455  else
1456  {
1457  str = cp + 1;
1458  tm->tm_sec = strtoint(str, &cp, 10);
1459  if (*cp == '\0')
1460  *fsec = 0;
1461  else if (*cp == '.')
1462  {
1463  char fstr[7];
1464  int i;
1465 
1466  cp++;
1467 
1468  /*
1469  * OK, we have at most six digits to care about. Let's construct a
1470  * string with those digits, zero-padded on the right, and then do
1471  * the conversion to an integer.
1472  *
1473  * XXX This truncates the seventh digit, unlike rounding it as the
1474  * backend does.
1475  */
1476  for (i = 0; i < 6; i++)
1477  fstr[i] = *cp != '\0' ? *cp++ : '0';
1478  fstr[i] = '\0';
1479  *fsec = strtoint(fstr, &cp, 10);
1480  if (*cp != '\0')
1481  return -1;
1482  }
1483  else
1484  return -1;
1485  }
1486 
1487  /* do a sanity check */
1488  if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_min > 59 ||
1489  tm->tm_sec < 0 || tm->tm_sec > 59 || *fsec >= USECS_PER_SEC)
1490  return -1;
1491 
1492  return 0;
1493 } /* DecodeTime() */
1494 
1495 /* DecodeTimezone()
1496  * Interpret string as a numeric timezone.
1497  *
1498  * Note: we allow timezone offsets up to 13:59. There are places that
1499  * use +1300 summer time.
1500  */
1501 static int
1502 DecodeTimezone(char *str, int *tzp)
1503 {
1504  int tz;
1505  int hr,
1506  min;
1507  char *cp;
1508  int len;
1509 
1510  /* assume leading character is "+" or "-" */
1511  hr = strtoint(str + 1, &cp, 10);
1512 
1513  /* explicit delimiter? */
1514  if (*cp == ':')
1515  min = strtoint(cp + 1, &cp, 10);
1516  /* otherwise, might have run things together... */
1517  else if (*cp == '\0' && (len = strlen(str)) > 3)
1518  {
1519  min = strtoint(str + len - 2, &cp, 10);
1520  if (min < 0 || min >= 60)
1521  return -1;
1522 
1523  *(str + len - 2) = '\0';
1524  hr = strtoint(str + 1, &cp, 10);
1525  if (hr < 0 || hr > 13)
1526  return -1;
1527  }
1528  else
1529  min = 0;
1530 
1531  tz = (hr * MINS_PER_HOUR + min) * SECS_PER_MINUTE;
1532  if (*str == '-')
1533  tz = -tz;
1534 
1535  *tzp = -tz;
1536  return *cp != '\0';
1537 } /* DecodeTimezone() */
1538 
1539 
1540 /* DecodePosixTimezone()
1541  * Interpret string as a POSIX-compatible timezone:
1542  * PST-hh:mm
1543  * PST+h
1544  * - thomas 2000-03-15
1545  */
1546 static int
1547 DecodePosixTimezone(char *str, int *tzp)
1548 {
1549  int val,
1550  tz;
1551  int type;
1552  char *cp;
1553  char delim;
1554 
1555  cp = str;
1556  while (*cp != '\0' && isalpha((unsigned char) *cp))
1557  cp++;
1558 
1559  if (DecodeTimezone(cp, &tz) != 0)
1560  return -1;
1561 
1562  delim = *cp;
1563  *cp = '\0';
1564  type = DecodeSpecial(MAXDATEFIELDS - 1, str, &val);
1565  *cp = delim;
1566 
1567  switch (type)
1568  {
1569  case DTZ:
1570  case TZ:
1571  *tzp = -(val + tz);
1572  break;
1573 
1574  default:
1575  return -1;
1576  }
1577 
1578  return 0;
1579 } /* DecodePosixTimezone() */
1580 
1581 /* ParseDateTime()
1582  * Break string into tokens based on a date/time context.
1583  * Several field types are assigned:
1584  * DTK_NUMBER - digits and (possibly) a decimal point
1585  * DTK_DATE - digits and two delimiters, or digits and text
1586  * DTK_TIME - digits, colon delimiters, and possibly a decimal point
1587  * DTK_STRING - text (no digits)
1588  * DTK_SPECIAL - leading "+" or "-" followed by text
1589  * DTK_TZ - leading "+" or "-" followed by digits
1590  * Note that some field types can hold unexpected items:
1591  * DTK_NUMBER can hold date fields (yy.ddd)
1592  * DTK_STRING can hold months (January) and time zones (PST)
1593  * DTK_DATE can hold Posix time zones (GMT-8)
1594  *
1595  * The "lowstr" work buffer must have at least strlen(timestr) + MAXDATEFIELDS
1596  * bytes of space. On output, field[] entries will point into it.
1597  * The field[] and ftype[] arrays must have at least MAXDATEFIELDS entries.
1598  */
1599 int
1600 ParseDateTime(char *timestr, char *lowstr,
1601  char **field, int *ftype, int *numfields, char **endstr)
1602 {
1603  int nf = 0;
1604  char *lp = lowstr;
1605 
1606  *endstr = timestr;
1607  /* outer loop through fields */
1608  while (*(*endstr) != '\0')
1609  {
1610  /* Record start of current field */
1611  if (nf >= MAXDATEFIELDS)
1612  return -1;
1613  field[nf] = lp;
1614 
1615  /* leading digit? then date or time */
1616  if (isdigit((unsigned char) *(*endstr)))
1617  {
1618  *lp++ = *(*endstr)++;
1619  while (isdigit((unsigned char) *(*endstr)))
1620  *lp++ = *(*endstr)++;
1621 
1622  /* time field? */
1623  if (*(*endstr) == ':')
1624  {
1625  ftype[nf] = DTK_TIME;
1626  *lp++ = *(*endstr)++;
1627  while (isdigit((unsigned char) *(*endstr)) ||
1628  (*(*endstr) == ':') || (*(*endstr) == '.'))
1629  *lp++ = *(*endstr)++;
1630  }
1631  /* date field? allow embedded text month */
1632  else if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1633  {
1634  /* save delimiting character to use later */
1635  char *dp = (*endstr);
1636 
1637  *lp++ = *(*endstr)++;
1638  /* second field is all digits? then no embedded text month */
1639  if (isdigit((unsigned char) *(*endstr)))
1640  {
1641  ftype[nf] = (*dp == '.') ? DTK_NUMBER : DTK_DATE;
1642  while (isdigit((unsigned char) *(*endstr)))
1643  *lp++ = *(*endstr)++;
1644 
1645  /*
1646  * insist that the delimiters match to get a three-field
1647  * date.
1648  */
1649  if (*(*endstr) == *dp)
1650  {
1651  ftype[nf] = DTK_DATE;
1652  *lp++ = *(*endstr)++;
1653  while (isdigit((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1654  *lp++ = *(*endstr)++;
1655  }
1656  }
1657  else
1658  {
1659  ftype[nf] = DTK_DATE;
1660  while (isalnum((unsigned char) *(*endstr)) || (*(*endstr) == *dp))
1661  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1662  }
1663  }
1664 
1665  /*
1666  * otherwise, number only and will determine year, month, day, or
1667  * concatenated fields later...
1668  */
1669  else
1670  ftype[nf] = DTK_NUMBER;
1671  }
1672  /* Leading decimal point? Then fractional seconds... */
1673  else if (*(*endstr) == '.')
1674  {
1675  *lp++ = *(*endstr)++;
1676  while (isdigit((unsigned char) *(*endstr)))
1677  *lp++ = *(*endstr)++;
1678 
1679  ftype[nf] = DTK_NUMBER;
1680  }
1681 
1682  /*
1683  * text? then date string, month, day of week, special, or timezone
1684  */
1685  else if (isalpha((unsigned char) *(*endstr)))
1686  {
1687  ftype[nf] = DTK_STRING;
1688  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1689  while (isalpha((unsigned char) *(*endstr)))
1690  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1691 
1692  /*
1693  * Full date string with leading text month? Could also be a POSIX
1694  * time zone...
1695  */
1696  if (*(*endstr) == '-' || *(*endstr) == '/' || *(*endstr) == '.')
1697  {
1698  char *dp = (*endstr);
1699 
1700  ftype[nf] = DTK_DATE;
1701  *lp++ = *(*endstr)++;
1702  while (isdigit((unsigned char) *(*endstr)) || *(*endstr) == *dp)
1703  *lp++ = *(*endstr)++;
1704  }
1705  }
1706  /* skip leading spaces */
1707  else if (isspace((unsigned char) *(*endstr)))
1708  {
1709  (*endstr)++;
1710  continue;
1711  }
1712  /* sign? then special or numeric timezone */
1713  else if (*(*endstr) == '+' || *(*endstr) == '-')
1714  {
1715  *lp++ = *(*endstr)++;
1716  /* soak up leading whitespace */
1717  while (isspace((unsigned char) *(*endstr)))
1718  (*endstr)++;
1719  /* numeric timezone? */
1720  if (isdigit((unsigned char) *(*endstr)))
1721  {
1722  ftype[nf] = DTK_TZ;
1723  *lp++ = *(*endstr)++;
1724  while (isdigit((unsigned char) *(*endstr)) ||
1725  (*(*endstr) == ':') || (*(*endstr) == '.'))
1726  *lp++ = *(*endstr)++;
1727  }
1728  /* special? */
1729  else if (isalpha((unsigned char) *(*endstr)))
1730  {
1731  ftype[nf] = DTK_SPECIAL;
1732  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1733  while (isalpha((unsigned char) *(*endstr)))
1734  *lp++ = pg_tolower((unsigned char) *(*endstr)++);
1735  }
1736  /* otherwise something wrong... */
1737  else
1738  return -1;
1739  }
1740  /* ignore punctuation but use as delimiter */
1741  else if (ispunct((unsigned char) *(*endstr)))
1742  {
1743  (*endstr)++;
1744  continue;
1745  }
1746  /* otherwise, something is not right... */
1747  else
1748  return -1;
1749 
1750  /* force in a delimiter after each field */
1751  *lp++ = '\0';
1752  nf++;
1753  }
1754 
1755  *numfields = nf;
1756 
1757  return 0;
1758 } /* ParseDateTime() */
1759 
1760 
1761 /* DecodeDateTime()
1762  * Interpret previously parsed fields for general date and time.
1763  * Return 0 if full date, 1 if only time, and -1 if problems.
1764  * External format(s):
1765  * "<weekday> <month>-<day>-<year> <hour>:<minute>:<second>"
1766  * "Fri Feb-7-1997 15:23:27"
1767  * "Feb-7-1997 15:23:27"
1768  * "2-7-1997 15:23:27"
1769  * "1997-2-7 15:23:27"
1770  * "1997.038 15:23:27" (day of year 1-366)
1771  * Also supports input in compact time:
1772  * "970207 152327"
1773  * "97038 152327"
1774  * "20011225T040506.789-07"
1775  *
1776  * Use the system-provided functions to get the current time zone
1777  * if not specified in the input string.
1778  * If the date is outside the time_t system-supported time range,
1779  * then assume UTC time zone. - thomas 1997-05-27
1780  */
1781 int
1782 DecodeDateTime(char **field, int *ftype, int nf,
1783  int *dtype, struct tm *tm, fsec_t *fsec, bool EuroDates)
1784 {
1785  int fmask = 0,
1786  tmask,
1787  type;
1788  int ptype = 0; /* "prefix type" for ISO y2001m02d04 format */
1789  int i;
1790  int val;
1791  int mer = HR24;
1792  bool haveTextMonth = false;
1793  bool is2digits = false;
1794  bool bc = false;
1795  int t = 0;
1796  int *tzp = &t;
1797 
1798  /***
1799  * We'll insist on at least all of the date fields, but initialize the
1800  * remaining fields in case they are not set later...
1801  ***/
1802  *dtype = DTK_DATE;
1803  tm->tm_hour = 0;
1804  tm->tm_min = 0;
1805  tm->tm_sec = 0;
1806  *fsec = 0;
1807  /* don't know daylight savings time status apriori */
1808  tm->tm_isdst = -1;
1809  if (tzp != NULL)
1810  *tzp = 0;
1811 
1812  for (i = 0; i < nf; i++)
1813  {
1814  switch (ftype[i])
1815  {
1816  case DTK_DATE:
1817  /***
1818  * Integral julian day with attached time zone?
1819  * All other forms with JD will be separated into
1820  * distinct fields, so we handle just this case here.
1821  ***/
1822  if (ptype == DTK_JULIAN)
1823  {
1824  char *cp;
1825  int jday;
1826 
1827  if (tzp == NULL)
1828  return -1;
1829 
1830  jday = strtoint(field[i], &cp, 10);
1831  if (*cp != '-')
1832  return -1;
1833 
1834  j2date(jday, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1835  /* Get the time zone from the end of the string */
1836  if (DecodeTimezone(cp, tzp) != 0)
1837  return -1;
1838 
1839  tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
1840  ptype = 0;
1841  break;
1842  }
1843  /***
1844  * Already have a date? Then this might be a POSIX time
1845  * zone with an embedded dash (e.g. "PST-3" == "EST") or
1846  * a run-together time with trailing time zone (e.g. hhmmss-zz).
1847  * - thomas 2001-12-25
1848  ***/
1849  else if (((fmask & DTK_DATE_M) == DTK_DATE_M)
1850  || (ptype != 0))
1851  {
1852  /* No time zone accepted? Then quit... */
1853  if (tzp == NULL)
1854  return -1;
1855 
1856  if (isdigit((unsigned char) *field[i]) || ptype != 0)
1857  {
1858  char *cp;
1859 
1860  if (ptype != 0)
1861  {
1862  /* Sanity check; should not fail this test */
1863  if (ptype != DTK_TIME)
1864  return -1;
1865  ptype = 0;
1866  }
1867 
1868  /*
1869  * Starts with a digit but we already have a time
1870  * field? Then we are in trouble with a date and time
1871  * already...
1872  */
1873  if ((fmask & DTK_TIME_M) == DTK_TIME_M)
1874  return -1;
1875 
1876  if ((cp = strchr(field[i], '-')) == NULL)
1877  return -1;
1878 
1879  /* Get the time zone from the end of the string */
1880  if (DecodeTimezone(cp, tzp) != 0)
1881  return -1;
1882  *cp = '\0';
1883 
1884  /*
1885  * Then read the rest of the field as a concatenated
1886  * time
1887  */
1888  if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], fmask,
1889  &tmask, tm, fsec, &is2digits)) < 0)
1890  return -1;
1891 
1892  /*
1893  * modify tmask after returning from
1894  * DecodeNumberField()
1895  */
1896  tmask |= DTK_M(TZ);
1897  }
1898  else
1899  {
1900  if (DecodePosixTimezone(field[i], tzp) != 0)
1901  return -1;
1902 
1903  ftype[i] = DTK_TZ;
1904  tmask = DTK_M(TZ);
1905  }
1906  }
1907  else if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
1908  return -1;
1909  break;
1910 
1911  case DTK_TIME:
1912  if (DecodeTime(field[i], &tmask, tm, fsec) != 0)
1913  return -1;
1914 
1915  /*
1916  * Check upper limit on hours; other limits checked in
1917  * DecodeTime()
1918  */
1919  /* test for > 24:00:00 */
1920  if (tm->tm_hour > 24 ||
1921  (tm->tm_hour == 24 && (tm->tm_min > 0 || tm->tm_sec > 0)))
1922  return -1;
1923  break;
1924 
1925  case DTK_TZ:
1926  {
1927  int tz;
1928 
1929  if (tzp == NULL)
1930  return -1;
1931 
1932  if (DecodeTimezone(field[i], &tz) != 0)
1933  return -1;
1934 
1935  /*
1936  * Already have a time zone? Then maybe this is the second
1937  * field of a POSIX time: EST+3 (equivalent to PST)
1938  */
1939  if (i > 0 && (fmask & DTK_M(TZ)) != 0 &&
1940  ftype[i - 1] == DTK_TZ &&
1941  isalpha((unsigned char) *field[i - 1]))
1942  {
1943  *tzp -= tz;
1944  tmask = 0;
1945  }
1946  else
1947  {
1948  *tzp = tz;
1949  tmask = DTK_M(TZ);
1950  }
1951  }
1952  break;
1953 
1954  case DTK_NUMBER:
1955 
1956  /*
1957  * Was this an "ISO date" with embedded field labels? An
1958  * example is "y2001m02d04" - thomas 2001-02-04
1959  */
1960  if (ptype != 0)
1961  {
1962  char *cp;
1963  int value;
1964 
1965  value = strtoint(field[i], &cp, 10);
1966 
1967  /*
1968  * only a few kinds are allowed to have an embedded
1969  * decimal
1970  */
1971  if (*cp == '.')
1972  switch (ptype)
1973  {
1974  case DTK_JULIAN:
1975  case DTK_TIME:
1976  case DTK_SECOND:
1977  break;
1978  default:
1979  return 1;
1980  break;
1981  }
1982  else if (*cp != '\0')
1983  return -1;
1984 
1985  switch (ptype)
1986  {
1987  case DTK_YEAR:
1988  tm->tm_year = value;
1989  tmask = DTK_M(YEAR);
1990  break;
1991 
1992  case DTK_MONTH:
1993 
1994  /*
1995  * already have a month and hour? then assume
1996  * minutes
1997  */
1998  if ((fmask & DTK_M(MONTH)) != 0 &&
1999  (fmask & DTK_M(HOUR)) != 0)
2000  {
2001  tm->tm_min = value;
2002  tmask = DTK_M(MINUTE);
2003  }
2004  else
2005  {
2006  tm->tm_mon = value;
2007  tmask = DTK_M(MONTH);
2008  }
2009  break;
2010 
2011  case DTK_DAY:
2012  tm->tm_mday = value;
2013  tmask = DTK_M(DAY);
2014  break;
2015 
2016  case DTK_HOUR:
2017  tm->tm_hour = value;
2018  tmask = DTK_M(HOUR);
2019  break;
2020 
2021  case DTK_MINUTE:
2022  tm->tm_min = value;
2023  tmask = DTK_M(MINUTE);
2024  break;
2025 
2026  case DTK_SECOND:
2027  tm->tm_sec = value;
2028  tmask = DTK_M(SECOND);
2029  if (*cp == '.')
2030  {
2031  double frac;
2032 
2033  frac = strtod(cp, &cp);
2034  if (*cp != '\0')
2035  return -1;
2036  *fsec = frac * 1000000;
2037  }
2038  break;
2039 
2040  case DTK_TZ:
2041  tmask = DTK_M(TZ);
2042  if (DecodeTimezone(field[i], tzp) != 0)
2043  return -1;
2044  break;
2045 
2046  case DTK_JULIAN:
2047  /***
2048  * previous field was a label for "julian date"?
2049  ***/
2050  tmask = DTK_DATE_M;
2051  j2date(value, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2052  /* fractional Julian Day? */
2053  if (*cp == '.')
2054  {
2055  double time;
2056 
2057  time = strtod(cp, &cp);
2058  if (*cp != '\0')
2059  return -1;
2060 
2061  tmask |= DTK_TIME_M;
2062  dt2time((time * USECS_PER_DAY), &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
2063  }
2064  break;
2065 
2066  case DTK_TIME:
2067  /* previous field was "t" for ISO time */
2068  if ((ftype[i] = DecodeNumberField(strlen(field[i]), field[i], (fmask | DTK_DATE_M),
2069  &tmask, tm, fsec, &is2digits)) < 0)
2070  return -1;
2071 
2072  if (tmask != DTK_TIME_M)
2073  return -1;
2074  break;
2075 
2076  default:
2077  return -1;
2078  break;
2079  }
2080 
2081  ptype = 0;
2082  *dtype = DTK_DATE;
2083  }
2084  else
2085  {
2086  char *cp;
2087  int flen;
2088 
2089  flen = strlen(field[i]);
2090  cp = strchr(field[i], '.');
2091 
2092  /* Embedded decimal and no date yet? */
2093  if (cp != NULL && !(fmask & DTK_DATE_M))
2094  {
2095  if (DecodeDate(field[i], fmask, &tmask, tm, EuroDates) != 0)
2096  return -1;
2097  }
2098  /* embedded decimal and several digits before? */
2099  else if (cp != NULL && flen - strlen(cp) > 2)
2100  {
2101  /*
2102  * Interpret as a concatenated date or time Set the
2103  * type field to allow decoding other fields later.
2104  * Example: 20011223 or 040506
2105  */
2106  if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2107  &tmask, tm, fsec, &is2digits)) < 0)
2108  return -1;
2109  }
2110  else if (flen > 4)
2111  {
2112  if ((ftype[i] = DecodeNumberField(flen, field[i], fmask,
2113  &tmask, tm, fsec, &is2digits)) < 0)
2114  return -1;
2115  }
2116  /* otherwise it is a single date/time field... */
2117  else if (DecodeNumber(flen, field[i], fmask,
2118  &tmask, tm, fsec, &is2digits, EuroDates) != 0)
2119  return -1;
2120  }
2121  break;
2122 
2123  case DTK_STRING:
2124  case DTK_SPECIAL:
2125  type = DecodeSpecial(i, field[i], &val);
2126  if (type == IGNORE_DTF)
2127  continue;
2128 
2129  tmask = DTK_M(type);
2130  switch (type)
2131  {
2132  case RESERV:
2133  switch (val)
2134  {
2135  case DTK_NOW:
2136  tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
2137  *dtype = DTK_DATE;
2138  GetCurrentDateTime(tm);
2139  break;
2140 
2141  case DTK_YESTERDAY:
2142  tmask = DTK_DATE_M;
2143  *dtype = DTK_DATE;
2144  GetCurrentDateTime(tm);
2145  j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - 1,
2146  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2147  tm->tm_hour = 0;
2148  tm->tm_min = 0;
2149  tm->tm_sec = 0;
2150  break;
2151 
2152  case DTK_TODAY:
2153  tmask = DTK_DATE_M;
2154  *dtype = DTK_DATE;
2155  GetCurrentDateTime(tm);
2156  tm->tm_hour = 0;
2157  tm->tm_min = 0;
2158  tm->tm_sec = 0;
2159  break;
2160 
2161  case DTK_TOMORROW:
2162  tmask = DTK_DATE_M;
2163  *dtype = DTK_DATE;
2164  GetCurrentDateTime(tm);
2165  j2date(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) + 1,
2166  &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
2167  tm->tm_hour = 0;
2168  tm->tm_min = 0;
2169  tm->tm_sec = 0;
2170  break;
2171 
2172  case DTK_ZULU:
2173  tmask = (DTK_TIME_M | DTK_M(TZ));
2174  *dtype = DTK_DATE;
2175  tm->tm_hour = 0;
2176  tm->tm_min = 0;
2177  tm->tm_sec = 0;
2178  if (tzp != NULL)
2179  *tzp = 0;
2180  break;
2181 
2182  default:
2183  *dtype = val;
2184  }
2185 
2186  break;
2187 
2188  case MONTH:
2189 
2190  /*
2191  * already have a (numeric) month? then see if we can
2192  * substitute...
2193  */
2194  if ((fmask & DTK_M(MONTH)) && !haveTextMonth &&
2195  !(fmask & DTK_M(DAY)) && tm->tm_mon >= 1 && tm->tm_mon <= 31)
2196  {
2197  tm->tm_mday = tm->tm_mon;
2198  tmask = DTK_M(DAY);
2199  }
2200  haveTextMonth = true;
2201  tm->tm_mon = val;
2202  break;
2203 
2204  case DTZMOD:
2205 
2206  /*
2207  * daylight savings time modifier (solves "MET DST"
2208  * syntax)
2209  */
2210  tmask |= DTK_M(DTZ);
2211  tm->tm_isdst = 1;
2212  if (tzp == NULL)
2213  return -1;
2214  *tzp -= val;
2215  break;
2216 
2217  case DTZ:
2218 
2219  /*
2220  * set mask for TZ here _or_ check for DTZ later when
2221  * getting default timezone
2222  */
2223  tmask |= DTK_M(TZ);
2224  tm->tm_isdst = 1;
2225  if (tzp == NULL)
2226  return -1;
2227  *tzp = -val;
2228  ftype[i] = DTK_TZ;
2229  break;
2230 
2231  case TZ:
2232  tm->tm_isdst = 0;
2233  if (tzp == NULL)
2234  return -1;
2235  *tzp = -val;
2236  ftype[i] = DTK_TZ;
2237  break;
2238 
2239  case IGNORE_DTF:
2240  break;
2241 
2242  case AMPM:
2243  mer = val;
2244  break;
2245 
2246  case ADBC:
2247  bc = (val == BC);
2248  break;
2249 
2250  case DOW:
2251  tm->tm_wday = val;
2252  break;
2253 
2254  case UNITS:
2255  tmask = 0;
2256  ptype = val;
2257  break;
2258 
2259  case ISOTIME:
2260 
2261  /*
2262  * This is a filler field "t" indicating that the next
2263  * field is time. Try to verify that this is sensible.
2264  */
2265  tmask = 0;
2266 
2267  /* No preceding date? Then quit... */
2268  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2269  return -1;
2270 
2271  /***
2272  * We will need one of the following fields:
2273  * DTK_NUMBER should be hhmmss.fff
2274  * DTK_TIME should be hh:mm:ss.fff
2275  * DTK_DATE should be hhmmss-zz
2276  ***/
2277  if (i >= nf - 1 ||
2278  (ftype[i + 1] != DTK_NUMBER &&
2279  ftype[i + 1] != DTK_TIME &&
2280  ftype[i + 1] != DTK_DATE))
2281  return -1;
2282 
2283  ptype = val;
2284  break;
2285 
2286  default:
2287  return -1;
2288  }
2289  break;
2290 
2291  default:
2292  return -1;
2293  }
2294 
2295  if (tmask & fmask)
2296  return -1;
2297  fmask |= tmask;
2298  }
2299 
2300  /* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
2301  if (bc)
2302  {
2303  if (tm->tm_year > 0)
2304  tm->tm_year = -(tm->tm_year - 1);
2305  else
2306  return -1;
2307  }
2308  else if (is2digits)
2309  {
2310  if (tm->tm_year < 70)
2311  tm->tm_year += 2000;
2312  else if (tm->tm_year < 100)
2313  tm->tm_year += 1900;
2314  }
2315 
2316  if (mer != HR24 && tm->tm_hour > 12)
2317  return -1;
2318  if (mer == AM && tm->tm_hour == 12)
2319  tm->tm_hour = 0;
2320  else if (mer == PM && tm->tm_hour != 12)
2321  tm->tm_hour += 12;
2322 
2323  /* do additional checking for full date specs... */
2324  if (*dtype == DTK_DATE)
2325  {
2326  if ((fmask & DTK_DATE_M) != DTK_DATE_M)
2327  return ((fmask & DTK_TIME_M) == DTK_TIME_M) ? 1 : -1;
2328 
2329  /*
2330  * check for valid day of month and month, now that we know for sure
2331  * the month and year...
2332  */
2333  if (tm->tm_mon < 1 || tm->tm_mday < 1 || tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
2334  return -1;
2335 
2336  /*
2337  * backend tried to find local timezone here but we don't use the
2338  * result afterwards anyway so we only check for this error: daylight
2339  * savings time modifier but no standard timezone?
2340  */
2341  if ((fmask & DTK_DATE_M) == DTK_DATE_M && tzp != NULL && !(fmask & DTK_M(TZ)) && (fmask & DTK_M(DTZMOD)))
2342  return -1;
2343  }
2344 
2345  return 0;
2346 } /* DecodeDateTime() */
2347 
2348 /* Function works as follows:
2349  *
2350  *
2351  * */
2352 
2353 static char *
2354 find_end_token(char *str, char *fmt)
2355 {
2356  /*
2357  * str: here is28the day12the hour fmt: here is%dthe day%hthe hour
2358  *
2359  * we extract the 28, we read the percent sign and the type "d" then this
2360  * functions gets called as find_end_token("28the day12the hour", "the
2361  * day%hthehour")
2362  *
2363  * fmt points to "the day%hthehour", next_percent points to %hthehour and
2364  * we have to find a match for everything between these positions ("the
2365  * day"). We look for "the day" in str and know that the pattern we are
2366  * about to scan ends where this string starts (right after the "28")
2367  *
2368  * At the end, *fmt is '\0' and *str isn't. end_position then is
2369  * unchanged.
2370  */
2371  char *end_position = NULL;
2372  char *next_percent,
2373  *subst_location = NULL;
2374  int scan_offset = 0;
2375  char last_char;
2376 
2377  /* are we at the end? */
2378  if (!*fmt)
2379  {
2380  end_position = fmt;
2381  return end_position;
2382  }
2383 
2384  /* not at the end */
2385  while (fmt[scan_offset] == '%' && fmt[scan_offset + 1])
2386  {
2387  /*
2388  * there is no delimiter, skip to the next delimiter if we're reading
2389  * a number and then something that is not a number "9:15pm", we might
2390  * be able to recover with the strtol end pointer. Go for the next
2391  * percent sign
2392  */
2393  scan_offset += 2;
2394  }
2395  next_percent = strchr(fmt + scan_offset, '%');
2396  if (next_percent)
2397  {
2398  /*
2399  * we don't want to allocate extra memory, so we temporarily set the
2400  * '%' sign to '\0' and call strstr However since we allow whitespace
2401  * to float around everything, we have to shorten the pattern until we
2402  * reach a non-whitespace character
2403  */
2404 
2405  subst_location = next_percent;
2406  while (*(subst_location - 1) == ' ' && subst_location - 1 > fmt + scan_offset)
2407  subst_location--;
2408  last_char = *subst_location;
2409  *subst_location = '\0';
2410 
2411  /*
2412  * the haystack is the str and the needle is the original fmt but it
2413  * ends at the position where the next percent sign would be
2414  */
2415 
2416  /*
2417  * There is one special case. Imagine: str = " 2", fmt = "%d %...",
2418  * since we want to allow blanks as "dynamic" padding we have to
2419  * accept this. Now, we are called with a fmt of " %..." and look for
2420  * " " in str. We find it at the first position and never read the
2421  * 2...
2422  */
2423  while (*str == ' ')
2424  str++;
2425  end_position = strstr(str, fmt + scan_offset);
2426  *subst_location = last_char;
2427  }
2428  else
2429  {
2430  /*
2431  * there is no other percent sign. So everything up to the end has to
2432  * match.
2433  */
2434  end_position = str + strlen(str);
2435  }
2436  if (!end_position)
2437  {
2438  /*
2439  * maybe we have the following case:
2440  *
2441  * str = "4:15am" fmt = "%M:%S %p"
2442  *
2443  * at this place we could have
2444  *
2445  * str = "15am" fmt = " %p"
2446  *
2447  * and have set fmt to " " because overwrote the % sign with a NULL
2448  *
2449  * In this case where we would have to match a space but can't find
2450  * it, set end_position to the end of the string
2451  */
2452  if ((fmt + scan_offset)[0] == ' ' && fmt + scan_offset + 1 == subst_location)
2453  end_position = str + strlen(str);
2454  }
2455  return end_position;
2456 }
2457 
2458 static int
2459 pgtypes_defmt_scan(union un_fmt_comb *scan_val, int scan_type, char **pstr, char *pfmt)
2460 {
2461  /*
2462  * scan everything between pstr and pstr_end. This is not including the
2463  * last character so we might set it to '\0' for the parsing
2464  */
2465 
2466  char last_char;
2467  int err = 0;
2468  char *pstr_end;
2469  char *strtol_end = NULL;
2470 
2471  while (**pstr == ' ')
2472  pstr++;
2473  pstr_end = find_end_token(*pstr, pfmt);
2474  if (!pstr_end)
2475  {
2476  /* there was an error, no match */
2477  return 1;
2478  }
2479  last_char = *pstr_end;
2480  *pstr_end = '\0';
2481 
2482  switch (scan_type)
2483  {
2484  case PGTYPES_TYPE_UINT:
2485 
2486  /*
2487  * numbers may be blank-padded, this is the only deviation from
2488  * the fmt-string we accept
2489  */
2490  while (**pstr == ' ')
2491  (*pstr)++;
2492  errno = 0;
2493  scan_val->uint_val = (unsigned int) strtol(*pstr, &strtol_end, 10);
2494  if (errno)
2495  err = 1;
2496  break;
2497  case PGTYPES_TYPE_UINT_LONG:
2498  while (**pstr == ' ')
2499  (*pstr)++;
2500  errno = 0;
2501  scan_val->luint_val = (unsigned long int) strtol(*pstr, &strtol_end, 10);
2502  if (errno)
2503  err = 1;
2504  break;
2505  case PGTYPES_TYPE_STRING_MALLOCED:
2506  scan_val->str_val = pgtypes_strdup(*pstr);
2507  if (scan_val->str_val == NULL)
2508  err = 1;
2509  break;
2510  }
2511  if (strtol_end && *strtol_end)
2512  *pstr = strtol_end;
2513  else
2514  *pstr = pstr_end;
2515  *pstr_end = last_char;
2516  return err;
2517 }
2518 
2519 /* XXX range checking */
2520 int
2521 PGTYPEStimestamp_defmt_scan(char **str, char *fmt, timestamp * d,
2522  int *year, int *month, int *day,
2523  int *hour, int *minute, int *second,
2524  int *tz)
2525 {
2526  union un_fmt_comb scan_val;
2527  int scan_type;
2528 
2529  char *pstr,
2530  *pfmt,
2531  *tmp;
2532  int err = 1;
2533  unsigned int j;
2534  struct tm tm;
2535 
2536  pfmt = fmt;
2537  pstr = *str;
2538 
2539  while (*pfmt)
2540  {
2541  err = 0;
2542  while (*pfmt == ' ')
2543  pfmt++;
2544  while (*pstr == ' ')
2545  pstr++;
2546  if (*pfmt != '%')
2547  {
2548  if (*pfmt == *pstr)
2549  {
2550  pfmt++;
2551  pstr++;
2552  }
2553  else
2554  {
2555  /* Error: no match */
2556  err = 1;
2557  return err;
2558  }
2559  continue;
2560  }
2561  /* here *pfmt equals '%' */
2562  pfmt++;
2563  switch (*pfmt)
2564  {
2565  case 'a':
2566  pfmt++;
2567 
2568  /*
2569  * we parse the day and see if it is a week day but we do not
2570  * check if the week day really matches the date
2571  */
2572  err = 1;
2573  j = 0;
2574  while (pgtypes_date_weekdays_short[j])
2575  {
2576  if (strncmp(pgtypes_date_weekdays_short[j], pstr,
2577  strlen(pgtypes_date_weekdays_short[j])) == 0)
2578  {
2579  /* found it */
2580  err = 0;
2581  pstr += strlen(pgtypes_date_weekdays_short[j]);
2582  break;
2583  }
2584  j++;
2585  }
2586  break;
2587  case 'A':
2588  /* see note above */
2589  pfmt++;
2590  err = 1;
2591  j = 0;
2592  while (days[j])
2593  {
2594  if (strncmp(days[j], pstr, strlen(days[j])) == 0)
2595  {
2596  /* found it */
2597  err = 0;
2598  pstr += strlen(days[j]);
2599  break;
2600  }
2601  j++;
2602  }
2603  break;
2604  case 'b':
2605  case 'h':
2606  pfmt++;
2607  err = 1;
2608  j = 0;
2609  while (months[j])
2610  {
2611  if (strncmp(months[j], pstr, strlen(months[j])) == 0)
2612  {
2613  /* found it */
2614  err = 0;
2615  pstr += strlen(months[j]);
2616  *month = j + 1;
2617  break;
2618  }
2619  j++;
2620  }
2621  break;
2622  case 'B':
2623  /* see note above */
2624  pfmt++;
2625  err = 1;
2626  j = 0;
2627  while (pgtypes_date_months[j])
2628  {
2629  if (strncmp(pgtypes_date_months[j], pstr, strlen(pgtypes_date_months[j])) == 0)
2630  {
2631  /* found it */
2632  err = 0;
2633  pstr += strlen(pgtypes_date_months[j]);
2634  *month = j + 1;
2635  break;
2636  }
2637  j++;
2638  }
2639  break;
2640  case 'c':
2641  /* XXX */
2642  break;
2643  case 'C':
2644  pfmt++;
2645  scan_type = PGTYPES_TYPE_UINT;
2646  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2647  *year = scan_val.uint_val * 100;
2648  break;
2649  case 'd':
2650  case 'e':
2651  pfmt++;
2652  scan_type = PGTYPES_TYPE_UINT;
2653  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2654  *day = scan_val.uint_val;
2655  break;
2656  case 'D':
2657 
2658  /*
2659  * we have to concatenate the strings in order to be able to
2660  * find the end of the substitution
2661  */
2662  pfmt++;
2663  tmp = pgtypes_alloc(strlen("%m/%d/%y") + strlen(pstr) + 1);
2664  if (!tmp)
2665  return 1;
2666  strcpy(tmp, "%m/%d/%y");
2667  strcat(tmp, pfmt);
2668  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2669  free(tmp);
2670  return err;
2671  case 'm':
2672  pfmt++;
2673  scan_type = PGTYPES_TYPE_UINT;
2674  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2675  *month = scan_val.uint_val;
2676  break;
2677  case 'y':
2678  case 'g': /* XXX difference to y (ISO) */
2679  pfmt++;
2680  scan_type = PGTYPES_TYPE_UINT;
2681  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2682  if (*year < 0)
2683  {
2684  /* not yet set */
2685  *year = scan_val.uint_val;
2686  }
2687  else
2688  *year += scan_val.uint_val;
2689  if (*year < 100)
2690  *year += 1900;
2691  break;
2692  case 'G':
2693  /* XXX difference to %V (ISO) */
2694  pfmt++;
2695  scan_type = PGTYPES_TYPE_UINT;
2696  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2697  *year = scan_val.uint_val;
2698  break;
2699  case 'H':
2700  case 'I':
2701  case 'k':
2702  case 'l':
2703  pfmt++;
2704  scan_type = PGTYPES_TYPE_UINT;
2705  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2706  *hour += scan_val.uint_val;
2707  break;
2708  case 'j':
2709  pfmt++;
2710  scan_type = PGTYPES_TYPE_UINT;
2711  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2712 
2713  /*
2714  * XXX what should we do with that? We could say that it's
2715  * sufficient if we have the year and the day within the year
2716  * to get at least a specific day.
2717  */
2718  break;
2719  case 'M':
2720  pfmt++;
2721  scan_type = PGTYPES_TYPE_UINT;
2722  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2723  *minute = scan_val.uint_val;
2724  break;
2725  case 'n':
2726  pfmt++;
2727  if (*pstr == '\n')
2728  pstr++;
2729  else
2730  err = 1;
2731  break;
2732  case 'p':
2733  err = 1;
2734  pfmt++;
2735  if (strncmp(pstr, "am", 2) == 0)
2736  {
2737  *hour += 0;
2738  err = 0;
2739  pstr += 2;
2740  }
2741  if (strncmp(pstr, "a.m.", 4) == 0)
2742  {
2743  *hour += 0;
2744  err = 0;
2745  pstr += 4;
2746  }
2747  if (strncmp(pstr, "pm", 2) == 0)
2748  {
2749  *hour += 12;
2750  err = 0;
2751  pstr += 2;
2752  }
2753  if (strncmp(pstr, "p.m.", 4) == 0)
2754  {
2755  *hour += 12;
2756  err = 0;
2757  pstr += 4;
2758  }
2759  break;
2760  case 'P':
2761  err = 1;
2762  pfmt++;
2763  if (strncmp(pstr, "AM", 2) == 0)
2764  {
2765  *hour += 0;
2766  err = 0;
2767  pstr += 2;
2768  }
2769  if (strncmp(pstr, "A.M.", 4) == 0)
2770  {
2771  *hour += 0;
2772  err = 0;
2773  pstr += 4;
2774  }
2775  if (strncmp(pstr, "PM", 2) == 0)
2776  {
2777  *hour += 12;
2778  err = 0;
2779  pstr += 2;
2780  }
2781  if (strncmp(pstr, "P.M.", 4) == 0)
2782  {
2783  *hour += 12;
2784  err = 0;
2785  pstr += 4;
2786  }
2787  break;
2788  case 'r':
2789  pfmt++;
2790  tmp = pgtypes_alloc(strlen("%I:%M:%S %p") + strlen(pstr) + 1);
2791  if (!tmp)
2792  return 1;
2793  strcpy(tmp, "%I:%M:%S %p");
2794  strcat(tmp, pfmt);
2795  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2796  free(tmp);
2797  return err;
2798  case 'R':
2799  pfmt++;
2800  tmp = pgtypes_alloc(strlen("%H:%M") + strlen(pstr) + 1);
2801  if (!tmp)
2802  return 1;
2803  strcpy(tmp, "%H:%M");
2804  strcat(tmp, pfmt);
2805  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2806  free(tmp);
2807  return err;
2808  case 's':
2809  pfmt++;
2810  scan_type = PGTYPES_TYPE_UINT_LONG;
2811  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2812  /* number of seconds in scan_val.luint_val */
2813  {
2814  struct tm *tms;
2815  struct tm tmbuf;
2816  time_t et = (time_t) scan_val.luint_val;
2817 
2818  tms = gmtime_r(&et, &tmbuf);
2819 
2820  if (tms)
2821  {
2822  *year = tms->tm_year + 1900;
2823  *month = tms->tm_mon + 1;
2824  *day = tms->tm_mday;
2825  *hour = tms->tm_hour;
2826  *minute = tms->tm_min;
2827  *second = tms->tm_sec;
2828  }
2829  else
2830  err = 1;
2831  }
2832  break;
2833  case 'S':
2834  pfmt++;
2835  scan_type = PGTYPES_TYPE_UINT;
2836  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2837  *second = scan_val.uint_val;
2838  break;
2839  case 't':
2840  pfmt++;
2841  if (*pstr == '\t')
2842  pstr++;
2843  else
2844  err = 1;
2845  break;
2846  case 'T':
2847  pfmt++;
2848  tmp = pgtypes_alloc(strlen("%H:%M:%S") + strlen(pstr) + 1);
2849  if (!tmp)
2850  return 1;
2851  strcpy(tmp, "%H:%M:%S");
2852  strcat(tmp, pfmt);
2853  err = PGTYPEStimestamp_defmt_scan(&pstr, tmp, d, year, month, day, hour, minute, second, tz);
2854  free(tmp);
2855  return err;
2856  case 'u':
2857  pfmt++;
2858  scan_type = PGTYPES_TYPE_UINT;
2859  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2860  if (scan_val.uint_val < 1 || scan_val.uint_val > 7)
2861  err = 1;
2862  break;
2863  case 'U':
2864  pfmt++;
2865  scan_type = PGTYPES_TYPE_UINT;
2866  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2867  if (scan_val.uint_val > 53)
2868  err = 1;
2869  break;
2870  case 'V':
2871  pfmt++;
2872  scan_type = PGTYPES_TYPE_UINT;
2873  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2874  if (scan_val.uint_val < 1 || scan_val.uint_val > 53)
2875  err = 1;
2876  break;
2877  case 'w':
2878  pfmt++;
2879  scan_type = PGTYPES_TYPE_UINT;
2880  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2881  if (scan_val.uint_val > 6)
2882  err = 1;
2883  break;
2884  case 'W':
2885  pfmt++;
2886  scan_type = PGTYPES_TYPE_UINT;
2887  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2888  if (scan_val.uint_val > 53)
2889  err = 1;
2890  break;
2891  case 'x':
2892  case 'X':
2893  /* XXX */
2894  break;
2895  case 'Y':
2896  pfmt++;
2897  scan_type = PGTYPES_TYPE_UINT;
2898  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2899  *year = scan_val.uint_val;
2900  break;
2901  case 'z':
2902  pfmt++;
2903  scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2904  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2905  if (!err)
2906  {
2907  err = DecodeTimezone(scan_val.str_val, tz);
2908  free(scan_val.str_val);
2909  }
2910  break;
2911  case 'Z':
2912  pfmt++;
2913  scan_type = PGTYPES_TYPE_STRING_MALLOCED;
2914  err = pgtypes_defmt_scan(&scan_val, scan_type, &pstr, pfmt);
2915  if (!err)
2916  {
2917  /*
2918  * XXX use DecodeSpecial instead? Do we need strcasecmp
2919  * here?
2920  */
2921  err = 1;
2922  for (j = 0; j < szdatetktbl; j++)
2923  {
2924  if ((datetktbl[j].type == TZ || datetktbl[j].type == DTZ) &&
2925  pg_strcasecmp(datetktbl[j].token,
2926  scan_val.str_val) == 0)
2927  {
2928  *tz = -datetktbl[j].value;
2929  err = 0;
2930  break;
2931  }
2932  }
2933  free(scan_val.str_val);
2934  }
2935  break;
2936  case '+':
2937  /* XXX */
2938  break;
2939  case '%':
2940  pfmt++;
2941  if (*pstr == '%')
2942  pstr++;
2943  else
2944  err = 1;
2945  break;
2946  default:
2947  err = 1;
2948  }
2949  }
2950  if (!err)
2951  {
2952  if (*second < 0)
2953  *second = 0;
2954  if (*minute < 0)
2955  *minute = 0;
2956  if (*hour < 0)
2957  *hour = 0;
2958  if (*day < 0)
2959  {
2960  err = 1;
2961  *day = 1;
2962  }
2963  if (*month < 0)
2964  {
2965  err = 1;
2966  *month = 1;
2967  }
2968  if (*year < 0)
2969  {
2970  err = 1;
2971  *year = 1970;
2972  }
2973 
2974  if (*second > 59)
2975  {
2976  err = 1;
2977  *second = 0;
2978  }
2979  if (*minute > 59)
2980  {
2981  err = 1;
2982  *minute = 0;
2983  }
2984  if (*hour > 24 || /* test for > 24:00:00 */
2985  (*hour == 24 && (*minute > 0 || *second > 0)))
2986  {
2987  err = 1;
2988  *hour = 0;
2989  }
2990  if (*month > MONTHS_PER_YEAR)
2991  {
2992  err = 1;
2993  *month = 1;
2994  }
2995  if (*day > day_tab[isleap(*year)][*month - 1])
2996  {
2997  *day = day_tab[isleap(*year)][*month - 1];
2998  err = 1;
2999  }
3000 
3001  tm.tm_sec = *second;
3002  tm.tm_min = *minute;
3003  tm.tm_hour = *hour;
3004  tm.tm_mday = *day;
3005  tm.tm_mon = *month;
3006  tm.tm_year = *year;
3007 
3008  tm2timestamp(&tm, 0, tz, d);
3009  }
3010  return err;
3011 }
3012 
3013 /* XXX: 1900 is compiled in as the base for years */
tm2timestamp
int tm2timestamp(struct pg_tm *tm, fsec_t fsec, int *tzp, Timestamp *result)
Definition: timestamp.c:1987
Assert
#define Assert(condition)
Definition: c.h:812
int64
int64_t int64
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lengthof
#define lengthof(array)
Definition: c.h:742
SECS_PER_HOUR
#define SECS_PER_HOUR
Definition: timestamp.h:127
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int32 fsec_t
Definition: timestamp.h:41
USECS_PER_HOUR
#define USECS_PER_HOUR
Definition: timestamp.h:132
MONTHS_PER_YEAR
#define MONTHS_PER_YEAR
Definition: timestamp.h:108
MINS_PER_HOUR
#define MINS_PER_HOUR
Definition: timestamp.h:129
SECS_PER_MINUTE
#define SECS_PER_MINUTE
Definition: timestamp.h:128
USECS_PER_DAY
#define USECS_PER_DAY
Definition: timestamp.h:131
USECS_PER_SEC
#define USECS_PER_SEC
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USECS_PER_MINUTE
#define USECS_PER_MINUTE
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EncodeDateOnly
void EncodeDateOnly(struct tm *tm, int style, char *str, bool EuroDates)
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int GetEpochTime(struct tm *tm)
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PGTYPEStimestamp_defmt_scan
int PGTYPEStimestamp_defmt_scan(char **str, char *fmt, timestamp *d, int *year, int *month, int *day, int *hour, int *minute, int *second, int *tz)
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const int day_tab[2][13]
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days
char * days[]
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EncodeDateTime
void EncodeDateTime(struct tm *tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str, bool EuroDates)
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TrimTrailingZeros
void TrimTrailingZeros(char *str)
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void GetCurrentDateTime(struct tm *tm)
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static int DecodeTimezone(char *str, int *tzp)
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static const datetkn datetktbl[]
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szdatetktbl
static const unsigned int szdatetktbl
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DecodePosixTimezone
static int DecodePosixTimezone(char *str, int *tzp)
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static const datetkn * deltacache[MAXDATEFIELDS]
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static void abstime2tm(AbsoluteTime _time, int *tzp, struct tm *tm, char **tzn)
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static const datetkn * datecache[MAXDATEFIELDS]
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int DecodeTime(char *str, int *tmask, struct tm *tm, fsec_t *fsec)
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int date2j(int y, int m, int d)
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static int DecodeNumber(int flen, char *str, int fmask, int *tmask, struct tm *tm, fsec_t *fsec, bool *is2digits, bool EuroDates)
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static int DecodeSpecial(int field, char *lowtoken, int *val)
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int DecodeDateTime(char **field, int *ftype, int nf, int *dtype, struct tm *tm, fsec_t *fsec, bool EuroDates)
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char * months[]
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char * pgtypes_date_weekdays_short[]
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static int pgtypes_defmt_scan(union un_fmt_comb *scan_val, int scan_type, char **pstr, char *pfmt)
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EPOCH
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#define YEAR
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#define DTK_DATE
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#define DTK_CENTURY
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#define TZ
Definition: datetime.h:95
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#define DTK_ISODOW
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#define DMONTH
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#define DTK_DAY
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#define ZULU
Definition: datetime.h:45
RESERV
#define RESERV
Definition: datetime.h:90
BC
#define BC
Definition: datetime.h:76
DB_C
#define DB_C
Definition: datetime.h:61
HR24
#define HR24
Definition: datetime.h:73
DTK_DATE_M
#define DTK_DATE_M
Definition: datetime.h:191
DTK_MILLENNIUM
#define DTK_MILLENNIUM
Definition: datetime.h:170
DTK_EARLY
#define DTK_EARLY
Definition: datetime.h:150
DDECADE
#define DDECADE
Definition: datetime.h:57
DDAY
#define DDAY
Definition: datetime.h:52
SECOND
#define SECOND
Definition: datetime.h:102
DMICROSEC
#define DMICROSEC
Definition: datetime.h:47
isleap
#define isleap(y)
Definition: datetime.h:271
DMILLENNIUM
#define DMILLENNIUM
Definition: datetime.h:59
DTZMOD
#define DTZMOD
Definition: datetime.h:122
DTK_DOY
#define DTK_DOY
Definition: datetime.h:176
DTK_TZ
#define DTK_TZ
Definition: datetime.h:146
DOW
#define DOW
Definition: datetime.h:106
DCENTURY
#define DCENTURY
Definition: datetime.h:58
DQUARTER
#define DQUARTER
Definition: datetime.h:55
AD
#define AD
Definition: datetime.h:75
TOMORROW
#define TOMORROW
Definition: datetime.h:43
EARLY
#define EARLY
Definition: datetime.h:39
DA_D
#define DA_D
Definition: datetime.h:60
ISOTIME
#define ISOTIME
Definition: datetime.h:115
DTK_HOUR
#define DTK_HOUR
Definition: datetime.h:162
DTK_WEEK
#define DTK_WEEK
Definition: datetime.h:164
MINUTE
#define MINUTE
Definition: datetime.h:101
DSECOND
#define DSECOND
Definition: datetime.h:49
LATE
#define LATE
Definition: datetime.h:40
DTK_MICROSEC
#define DTK_MICROSEC
Definition: datetime.h:172
DTZ
#define DTZ
Definition: datetime.h:96
NOW
#define NOW
Definition: datetime.h:41
DMILLISEC
#define DMILLISEC
Definition: datetime.h:48
DTK_DOW
#define DTK_DOW
Definition: datetime.h:175
DTK_YEAR
#define DTK_YEAR
Definition: datetime.h:167
AGO
#define AGO
Definition: datetime.h:110
AM
#define AM
Definition: datetime.h:71
DTK_MILLISEC
#define DTK_MILLISEC
Definition: datetime.h:171
TODAY
#define TODAY
Definition: datetime.h:42
YESTERDAY
#define YESTERDAY
Definition: datetime.h:44
DTK_MONTH
#define DTK_MONTH
Definition: datetime.h:165
DTK_YESTERDAY
#define DTK_YESTERDAY
Definition: datetime.h:154
DOY
#define DOY
Definition: datetime.h:105
DMINUTE
#define DMINUTE
Definition: datetime.h:50
DTK_ZULU
#define DTK_ZULU
Definition: datetime.h:157
TOKMAXLEN
#define TOKMAXLEN
Definition: datetime.h:204
DTK_MINUTE
#define DTK_MINUTE
Definition: datetime.h:161
UNITS
#define UNITS
Definition: datetime.h:107
DTK_TODAY
#define DTK_TODAY
Definition: datetime.h:155
DTK_NOW
#define DTK_NOW
Definition: datetime.h:153
token
#define token
Definition: indent_globs.h:126
value
static struct @160 value
val
long val
Definition: informix.c:689
pgtypes_strdup
char * pgtypes_strdup(const char *str)
Definition: common.c:20
pgtypes_alloc
char * pgtypes_alloc(long size)
Definition: common.c:10
y
int y
Definition: isn.c:71
j
int j
Definition: isn.c:73
i
int i
Definition: isn.c:72
fmt
static void const char * fmt
Definition: libpq_pipeline.c:27
tm
static struct pg_tm tm
Definition: localtime.c:104
USE_SQL_DATES
#define USE_SQL_DATES
Definition: miscadmin.h:237
USE_POSTGRES_DATES
#define USE_POSTGRES_DATES
Definition: miscadmin.h:235
MAXTZLEN
#define MAXTZLEN
Definition: miscadmin.h:263
USE_ISO_DATES
#define USE_ISO_DATES
Definition: miscadmin.h:236
USE_GERMAN_DATES
#define USE_GERMAN_DATES
Definition: miscadmin.h:238
len
const void size_t len
Definition: pg_crc32c_sse42.c:25
PGTYPES_TS_BAD_TIMESTAMP
#define PGTYPES_TS_BAD_TIMESTAMP
Definition: pgtypes_error.h:15
pgtypes_timestamp.h
timestamp
int64 timestamp
Definition: pgtypes_timestamp.h:10
pgtypeslib_extern.h
PGTYPES_TYPE_UINT
#define PGTYPES_TYPE_UINT
Definition: pgtypeslib_extern.h:16
PGTYPES_TYPE_STRING_MALLOCED
#define PGTYPES_TYPE_STRING_MALLOCED
Definition: pgtypeslib_extern.h:11
PGTYPES_TYPE_UINT_LONG
#define PGTYPES_TYPE_UINT_LONG
Definition: pgtypeslib_extern.h:21
TIMEZONE_GLOBAL
#define TIMEZONE_GLOBAL
Definition: port.h:268
pg_strcasecmp
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36
sprintf
#define sprintf
Definition: port.h:240
pg_tolower
unsigned char pg_tolower(unsigned char ch)
Definition: pgstrcasecmp.c:122
TZNAME_GLOBAL
#define TZNAME_GLOBAL
Definition: port.h:269
strlcpy
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
postgres_fe.h
strtoint
int strtoint(const char *pg_restrict str, char **pg_restrict endptr, int base)
Definition: string.c:50
datetkn::value
int32 value
Definition: datetime.h:211
datetkn::type
char type
Definition: datetime.h:210
pg_tm::tm_hour
int tm_hour
Definition: pgtime.h:38
pg_tm::tm_mday
int tm_mday
Definition: pgtime.h:39
pg_tm::tm_mon
int tm_mon
Definition: pgtime.h:40
pg_tm::tm_min
int tm_min
Definition: pgtime.h:37
pg_tm::tm_zone
const char * tm_zone
Definition: pgtime.h:46
pg_tm::tm_yday
int tm_yday
Definition: pgtime.h:43
pg_tm::tm_wday
int tm_wday
Definition: pgtime.h:42
pg_tm::tm_sec
int tm_sec
Definition: pgtime.h:36
pg_tm::tm_isdst
int tm_isdst
Definition: pgtime.h:44
pg_tm::tm_gmtoff
long int tm_gmtoff
Definition: pgtime.h:45
pg_tm::tm_year
int tm_year
Definition: pgtime.h:41
un_fmt_comb
Definition: pgtypeslib_extern.h:26
un_fmt_comb::uint_val
unsigned int uint_val
Definition: pgtypeslib_extern.h:28
un_fmt_comb::luint_val
unsigned long int luint_val
Definition: pgtypeslib_extern.h:30
un_fmt_comb::str_val
char * str_val
Definition: pgtypeslib_extern.h:27
type
const char * type
Definition: wait_event_funcs.c:27
epoch
static const unsigned __int64 epoch
Definition: win32gettimeofday.c:36