/
dt_common.c
3218 lines (2932 loc) · 78.7 KB
/
dt_common.c
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#include "postgres_fe.h"
#include <time.h>
#include <ctype.h>
#include <math.h>
#include "extern.h"
#include "dt.h"
#include "pgtypes_timestamp.h"
static int day_tab[2][13] = {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0}};
typedef long AbsoluteTime;
#define ABS_SIGNBIT ((char) 0200)
#define POS(n) (n)
#define NEG(n) ((n)|ABS_SIGNBIT)
#define FROMVAL(tp) (-SIGNEDCHAR((tp)->value) * 15) /* uncompress */
#define VALMASK ((char) 0177)
#define SIGNEDCHAR(c) ((c)&ABS_SIGNBIT? -((c)&VALMASK): (c))
static datetkn datetktbl[] = {
/* text, token, lexval */
{EARLY, RESERV, DTK_EARLY}, /* "-infinity" reserved for "early time" */
{"abstime", IGNORE_DTF, 0}, /* for pre-v6.1 "Invalid Abstime" */
{"acsst", DTZ, POS(42)}, /* Cent. Australia */
{"acst", DTZ, NEG(16)}, /* Atlantic/Porto Acre */
{"act", TZ, NEG(20)}, /* Atlantic/Porto Acre */
{DA_D, ADBC, AD}, /* "ad" for years >= 0 */
{"adt", DTZ, NEG(12)}, /* Atlantic Daylight Time */
{"aesst", DTZ, POS(44)}, /* E. Australia */
{"aest", TZ, POS(40)}, /* Australia Eastern Std Time */
{"aft", TZ, POS(18)}, /* Kabul */
{"ahst", TZ, NEG(40)}, /* Alaska-Hawaii Std Time */
{"akdt", DTZ, NEG(32)}, /* Alaska Daylight Time */
{"akst", DTZ, NEG(36)}, /* Alaska Standard Time */
{"allballs", RESERV, DTK_ZULU}, /* 00:00:00 */
{"almst", TZ, POS(28)}, /* Almaty Savings Time */
{"almt", TZ, POS(24)}, /* Almaty Time */
{"am", AMPM, AM},
{"amst", DTZ, POS(20)}, /* Armenia Summer Time (Yerevan) */
#if 0
{"amst", DTZ, NEG(12)}, /* Porto Velho */
#endif
{"amt", TZ, POS(16)}, /* Armenia Time (Yerevan) */
{"anast", DTZ, POS(52)}, /* Anadyr Summer Time (Russia) */
{"anat", TZ, POS(48)}, /* Anadyr Time (Russia) */
{"apr", MONTH, 4},
{"april", MONTH, 4},
#if 0
aqtst
aqtt
arst
#endif
{"art", TZ, NEG(12)}, /* Argentina Time */
#if 0
ashst
ast /* Atlantic Standard Time, Arabia Standard
* Time, Acre Standard Time */
#endif
{"ast", TZ, NEG(16)}, /* Atlantic Std Time (Canada) */
{"at", IGNORE_DTF, 0}, /* "at" (throwaway) */
{"aug", MONTH, 8},
{"august", MONTH, 8},
{"awsst", DTZ, POS(36)}, /* W. Australia */
{"awst", TZ, POS(32)}, /* W. Australia */
{"awt", DTZ, NEG(12)},
{"azost", DTZ, POS(0)}, /* Azores Summer Time */
{"azot", TZ, NEG(4)}, /* Azores Time */
{"azst", DTZ, POS(20)}, /* Azerbaijan Summer Time */
{"azt", TZ, POS(16)}, /* Azerbaijan Time */
{DB_C, ADBC, BC}, /* "bc" for years < 0 */
{"bdst", TZ, POS(8)}, /* British Double Summer Time */
{"bdt", TZ, POS(24)}, /* Dacca */
{"bnt", TZ, POS(32)}, /* Brunei Darussalam Time */
{"bort", TZ, POS(32)}, /* Borneo Time (Indonesia) */
#if 0
bortst
bost
#endif
{"bot", TZ, NEG(16)}, /* Bolivia Time */
{"bra", TZ, NEG(12)}, /* Brazil Time */
#if 0
brst
brt
#endif
{"bst", DTZ, POS(4)}, /* British Summer Time */
#if 0
{"bst", TZ, NEG(12)}, /* Brazil Standard Time */
{"bst", DTZ, NEG(44)}, /* Bering Summer Time */
#endif
{"bt", TZ, POS(12)}, /* Baghdad Time */
{"btt", TZ, POS(24)}, /* Bhutan Time */
{"cadt", DTZ, POS(42)}, /* Central Australian DST */
{"cast", TZ, POS(38)}, /* Central Australian ST */
{"cat", TZ, NEG(40)}, /* Central Alaska Time */
{"cct", TZ, POS(32)}, /* China Coast Time */
#if 0
{"cct", TZ, POS(26)}, /* Indian Cocos (Island) Time */
#endif
{"cdt", DTZ, NEG(20)}, /* Central Daylight Time */
{"cest", DTZ, POS(8)}, /* Central European Dayl.Time */
{"cet", TZ, POS(4)}, /* Central European Time */
{"cetdst", DTZ, POS(8)}, /* Central European Dayl.Time */
{"chadt", DTZ, POS(55)}, /* Chatham Island Daylight Time (13:45) */
{"chast", TZ, POS(51)}, /* Chatham Island Time (12:45) */
#if 0
ckhst
#endif
{"ckt", TZ, POS(48)}, /* Cook Islands Time */
{"clst", DTZ, NEG(12)}, /* Chile Summer Time */
{"clt", TZ, NEG(16)}, /* Chile Time */
#if 0
cost
#endif
{"cot", TZ, NEG(20)}, /* Columbia Time */
{"cst", TZ, NEG(24)}, /* Central Standard Time */
{DCURRENT, RESERV, DTK_CURRENT}, /* "current" is always now */
#if 0
cvst
#endif
{"cvt", TZ, POS(28)}, /* Christmas Island Time (Indian Ocean) */
{"cxt", TZ, POS(28)}, /* Christmas Island Time (Indian Ocean) */
{"d", UNITS, DTK_DAY}, /* "day of month" for ISO input */
{"davt", TZ, POS(28)}, /* Davis Time (Antarctica) */
{"ddut", TZ, POS(40)}, /* Dumont-d'Urville Time (Antarctica) */
{"dec", MONTH, 12},
{"december", MONTH, 12},
{"dnt", TZ, POS(4)}, /* Dansk Normal Tid */
{"dow", RESERV, DTK_DOW}, /* day of week */
{"doy", RESERV, DTK_DOY}, /* day of year */
{"dst", DTZMOD, 6},
#if 0
{"dusst", DTZ, POS(24)}, /* Dushanbe Summer Time */
#endif
{"easst", DTZ, NEG(20)}, /* Easter Island Summer Time */
{"east", TZ, NEG(24)}, /* Easter Island Time */
{"eat", TZ, POS(12)}, /* East Africa Time */
#if 0
{"east", DTZ, POS(16)}, /* Indian Antananarivo Savings Time */
{"eat", TZ, POS(12)}, /* Indian Antananarivo Time */
{"ect", TZ, NEG(16)}, /* Eastern Caribbean Time */
{"ect", TZ, NEG(20)}, /* Ecuador Time */
#endif
{"edt", DTZ, NEG(16)}, /* Eastern Daylight Time */
{"eest", DTZ, POS(12)}, /* Eastern Europe Summer Time */
{"eet", TZ, POS(8)}, /* East. Europe, USSR Zone 1 */
{"eetdst", DTZ, POS(12)}, /* Eastern Europe Daylight Time */
{"egst", DTZ, POS(0)}, /* East Greenland Summer Time */
{"egt", TZ, NEG(4)}, /* East Greenland Time */
#if 0
ehdt
#endif
{EPOCH, RESERV, DTK_EPOCH}, /* "epoch" reserved for system epoch time */
{"est", TZ, NEG(20)}, /* Eastern Standard Time */
{"feb", MONTH, 2},
{"february", MONTH, 2},
{"fjst", DTZ, NEG(52)}, /* Fiji Summer Time (13 hour offset!) */
{"fjt", TZ, NEG(48)}, /* Fiji Time */
{"fkst", DTZ, NEG(12)}, /* Falkland Islands Summer Time */
{"fkt", TZ, NEG(8)}, /* Falkland Islands Time */
#if 0
fnst
fnt
#endif
{"fri", DOW, 5},
{"friday", DOW, 5},
{"fst", TZ, POS(4)}, /* French Summer Time */
{"fwt", DTZ, POS(8)}, /* French Winter Time */
{"galt", TZ, NEG(24)}, /* Galapagos Time */
{"gamt", TZ, NEG(36)}, /* Gambier Time */
{"gest", DTZ, POS(20)}, /* Georgia Summer Time */
{"get", TZ, POS(16)}, /* Georgia Time */
{"gft", TZ, NEG(12)}, /* French Guiana Time */
#if 0
ghst
#endif
{"gilt", TZ, POS(48)}, /* Gilbert Islands Time */
{"gmt", TZ, POS(0)}, /* Greenwish Mean Time */
{"gst", TZ, POS(40)}, /* Guam Std Time, USSR Zone 9 */
{"gyt", TZ, NEG(16)}, /* Guyana Time */
{"h", UNITS, DTK_HOUR}, /* "hour" */
#if 0
hadt
hast
#endif
{"hdt", DTZ, NEG(36)}, /* Hawaii/Alaska Daylight Time */
#if 0
hkst
#endif
{"hkt", TZ, POS(32)}, /* Hong Kong Time */
#if 0
{"hmt", TZ, POS(12)}, /* Hellas ? ? */
hovst
hovt
#endif
{"hst", TZ, NEG(40)}, /* Hawaii Std Time */
#if 0
hwt
#endif
{"ict", TZ, POS(28)}, /* Indochina Time */
{"idle", TZ, POS(48)}, /* Intl. Date Line, East */
{"idlw", TZ, NEG(48)}, /* Intl. Date Line, West */
#if 0
idt /* Israeli, Iran, Indian Daylight Time */
#endif
{LATE, RESERV, DTK_LATE}, /* "infinity" reserved for "late time" */
{INVALID, RESERV, DTK_INVALID}, /* "invalid" reserved for bad time */
{"iot", TZ, POS(20)}, /* Indian Chagos Time */
{"irkst", DTZ, POS(36)}, /* Irkutsk Summer Time */
{"irkt", TZ, POS(32)}, /* Irkutsk Time */
{"irt", TZ, POS(14)}, /* Iran Time */
#if 0
isst
#endif
{"ist", TZ, POS(8)}, /* Israel */
{"it", TZ, POS(14)}, /* Iran Time */
{"j", UNITS, DTK_JULIAN},
{"jan", MONTH, 1},
{"january", MONTH, 1},
{"javt", TZ, POS(28)}, /* Java Time (07:00? see JT) */
{"jayt", TZ, POS(36)}, /* Jayapura Time (Indonesia) */
{"jd", UNITS, DTK_JULIAN},
{"jst", TZ, POS(36)}, /* Japan Std Time,USSR Zone 8 */
{"jt", TZ, POS(30)}, /* Java Time (07:30? see JAVT) */
{"jul", MONTH, 7},
{"julian", UNITS, DTK_JULIAN},
{"july", MONTH, 7},
{"jun", MONTH, 6},
{"june", MONTH, 6},
{"kdt", DTZ, POS(40)}, /* Korea Daylight Time */
{"kgst", DTZ, POS(24)}, /* Kyrgyzstan Summer Time */
{"kgt", TZ, POS(20)}, /* Kyrgyzstan Time */
{"kost", TZ, POS(48)}, /* Kosrae Time */
{"krast", DTZ, POS(28)}, /* Krasnoyarsk Summer Time */
{"krat", TZ, POS(32)}, /* Krasnoyarsk Standard Time */
{"kst", TZ, POS(36)}, /* Korea Standard Time */
{"lhdt", DTZ, POS(44)}, /* Lord Howe Daylight Time, Australia */
{"lhst", TZ, POS(42)}, /* Lord Howe Standard Time, Australia */
{"ligt", TZ, POS(40)}, /* From Melbourne, Australia */
{"lint", TZ, POS(56)}, /* Line Islands Time (Kiribati; +14
* hours!) */
{"lkt", TZ, POS(24)}, /* Lanka Time */
{"m", UNITS, DTK_MONTH}, /* "month" for ISO input */
{"magst", DTZ, POS(48)}, /* Magadan Summer Time */
{"magt", TZ, POS(44)}, /* Magadan Time */
{"mar", MONTH, 3},
{"march", MONTH, 3},
{"mart", TZ, NEG(38)}, /* Marquesas Time */
{"mawt", TZ, POS(24)}, /* Mawson, Antarctica */
{"may", MONTH, 5},
{"mdt", DTZ, NEG(24)}, /* Mountain Daylight Time */
{"mest", DTZ, POS(8)}, /* Middle Europe Summer Time */
{"met", TZ, POS(4)}, /* Middle Europe Time */
{"metdst", DTZ, POS(8)}, /* Middle Europe Daylight Time */
{"mewt", TZ, POS(4)}, /* Middle Europe Winter Time */
{"mez", TZ, POS(4)}, /* Middle Europe Zone */
{"mht", TZ, POS(48)}, /* Kwajalein */
{"mm", UNITS, DTK_MINUTE}, /* "minute" for ISO input */
{"mmt", TZ, POS(26)}, /* Myannar Time */
{"mon", DOW, 1},
{"monday", DOW, 1},
#if 0
most
#endif
{"mpt", TZ, POS(40)}, /* North Mariana Islands Time */
{"msd", DTZ, POS(16)}, /* Moscow Summer Time */
{"msk", TZ, POS(12)}, /* Moscow Time */
{"mst", TZ, NEG(28)}, /* Mountain Standard Time */
{"mt", TZ, POS(34)}, /* Moluccas Time */
{"mut", TZ, POS(16)}, /* Mauritius Island Time */
{"mvt", TZ, POS(20)}, /* Maldives Island Time */
{"myt", TZ, POS(32)}, /* Malaysia Time */
#if 0
ncst
#endif
{"nct", TZ, POS(44)}, /* New Caledonia Time */
{"ndt", DTZ, NEG(10)}, /* Nfld. Daylight Time */
{"nft", TZ, NEG(14)}, /* Newfoundland Standard Time */
{"nor", TZ, POS(4)}, /* Norway Standard Time */
{"nov", MONTH, 11},
{"november", MONTH, 11},
{"novst", DTZ, POS(28)}, /* Novosibirsk Summer Time */
{"novt", TZ, POS(24)}, /* Novosibirsk Standard Time */
{NOW, RESERV, DTK_NOW}, /* current transaction time */
{"npt", TZ, POS(23)}, /* Nepal Standard Time (GMT-5:45) */
{"nst", TZ, NEG(14)}, /* Nfld. Standard Time */
{"nt", TZ, NEG(44)}, /* Nome Time */
{"nut", TZ, NEG(44)}, /* Niue Time */
{"nzdt", DTZ, POS(52)}, /* New Zealand Daylight Time */
{"nzst", TZ, POS(48)}, /* New Zealand Standard Time */
{"nzt", TZ, POS(48)}, /* New Zealand Time */
{"oct", MONTH, 10},
{"october", MONTH, 10},
{"omsst", DTZ, POS(28)}, /* Omsk Summer Time */
{"omst", TZ, POS(24)}, /* Omsk Time */
{"on", IGNORE_DTF, 0}, /* "on" (throwaway) */
{"pdt", DTZ, NEG(28)}, /* Pacific Daylight Time */
#if 0
pest
#endif
{"pet", TZ, NEG(20)}, /* Peru Time */
{"petst", DTZ, POS(52)}, /* Petropavlovsk-Kamchatski Summer Time */
{"pett", TZ, POS(48)}, /* Petropavlovsk-Kamchatski Time */
{"pgt", TZ, POS(40)}, /* Papua New Guinea Time */
{"phot", TZ, POS(52)}, /* Phoenix Islands (Kiribati) Time */
#if 0
phst
#endif
{"pht", TZ, POS(32)}, /* Phillipine Time */
{"pkt", TZ, POS(20)}, /* Pakistan Time */
{"pm", AMPM, PM},
{"pmdt", DTZ, NEG(8)}, /* Pierre & Miquelon Daylight Time */
#if 0
pmst
#endif
{"pont", TZ, POS(44)}, /* Ponape Time (Micronesia) */
{"pst", TZ, NEG(32)}, /* Pacific Standard Time */
{"pwt", TZ, POS(36)}, /* Palau Time */
{"pyst", DTZ, NEG(12)}, /* Paraguay Summer Time */
{"pyt", TZ, NEG(16)}, /* Paraguay Time */
{"ret", DTZ, POS(16)}, /* Reunion Island Time */
{"s", UNITS, DTK_SECOND}, /* "seconds" for ISO input */
{"sadt", DTZ, POS(42)}, /* S. Australian Dayl. Time */
#if 0
samst
samt
#endif
{"sast", TZ, POS(38)}, /* South Australian Std Time */
{"sat", DOW, 6},
{"saturday", DOW, 6},
#if 0
sbt
#endif
{"sct", DTZ, POS(16)}, /* Mahe Island Time */
{"sep", MONTH, 9},
{"sept", MONTH, 9},
{"september", MONTH, 9},
{"set", TZ, NEG(4)}, /* Seychelles Time ?? */
#if 0
sgt
#endif
{"sst", DTZ, POS(8)}, /* Swedish Summer Time */
{"sun", DOW, 0},
{"sunday", DOW, 0},
{"swt", TZ, POS(4)}, /* Swedish Winter Time */
#if 0
syot
#endif
{"t", ISOTIME, DTK_TIME}, /* Filler for ISO time fields */
{"tft", TZ, POS(20)}, /* Kerguelen Time */
{"that", TZ, NEG(40)}, /* Tahiti Time */
{"thu", DOW, 4},
{"thur", DOW, 4},
{"thurs", DOW, 4},
{"thursday", DOW, 4},
{"tjt", TZ, POS(20)}, /* Tajikistan Time */
{"tkt", TZ, NEG(40)}, /* Tokelau Time */
{"tmt", TZ, POS(20)}, /* Turkmenistan Time */
{TODAY, RESERV, DTK_TODAY}, /* midnight */
{TOMORROW, RESERV, DTK_TOMORROW}, /* tomorrow midnight */
#if 0
tost
#endif
{"tot", TZ, POS(52)}, /* Tonga Time */
#if 0
tpt
#endif
{"truk", TZ, POS(40)}, /* Truk Time */
{"tue", DOW, 2},
{"tues", DOW, 2},
{"tuesday", DOW, 2},
{"tvt", TZ, POS(48)}, /* Tuvalu Time */
#if 0
uct
#endif
{"ulast", DTZ, POS(36)}, /* Ulan Bator Summer Time */
{"ulat", TZ, POS(32)}, /* Ulan Bator Time */
{"undefined", RESERV, DTK_INVALID}, /* pre-v6.1 invalid time */
{"ut", TZ, POS(0)},
{"utc", TZ, POS(0)},
{"uyst", DTZ, NEG(8)}, /* Uruguay Summer Time */
{"uyt", TZ, NEG(12)}, /* Uruguay Time */
{"uzst", DTZ, POS(24)}, /* Uzbekistan Summer Time */
{"uzt", TZ, POS(20)}, /* Uzbekistan Time */
{"vet", TZ, NEG(16)}, /* Venezuela Time */
{"vlast", DTZ, POS(44)}, /* Vladivostok Summer Time */
{"vlat", TZ, POS(40)}, /* Vladivostok Time */
#if 0
vust
#endif
{"vut", TZ, POS(44)}, /* Vanuata Time */
{"wadt", DTZ, POS(32)}, /* West Australian DST */
{"wakt", TZ, POS(48)}, /* Wake Time */
#if 0
warst
#endif
{"wast", TZ, POS(28)}, /* West Australian Std Time */
{"wat", TZ, NEG(4)}, /* West Africa Time */
{"wdt", DTZ, POS(36)}, /* West Australian DST */
{"wed", DOW, 3},
{"wednesday", DOW, 3},
{"weds", DOW, 3},
{"west", DTZ, POS(4)}, /* Western Europe Summer Time */
{"wet", TZ, POS(0)}, /* Western Europe */
{"wetdst", DTZ, POS(4)}, /* Western Europe Daylight Savings Time */
{"wft", TZ, POS(48)}, /* Wallis and Futuna Time */
{"wgst", DTZ, NEG(8)}, /* West Greenland Summer Time */
{"wgt", TZ, NEG(12)}, /* West Greenland Time */
{"wst", TZ, POS(32)}, /* West Australian Standard Time */
{"y", UNITS, DTK_YEAR}, /* "year" for ISO input */
{"yakst", DTZ, POS(40)}, /* Yakutsk Summer Time */
{"yakt", TZ, POS(36)}, /* Yakutsk Time */
{"yapt", TZ, POS(40)}, /* Yap Time (Micronesia) */
{"ydt", DTZ, NEG(32)}, /* Yukon Daylight Time */
{"yekst", DTZ, POS(24)}, /* Yekaterinburg Summer Time */
{"yekt", TZ, POS(20)}, /* Yekaterinburg Time */
{YESTERDAY, RESERV, DTK_YESTERDAY}, /* yesterday midnight */
{"yst", TZ, NEG(36)}, /* Yukon Standard Time */
{"z", TZ, POS(0)}, /* time zone tag per ISO-8601 */
{"zp4", TZ, NEG(16)}, /* UTC +4 hours. */
{"zp5", TZ, NEG(20)}, /* UTC +5 hours. */
{"zp6", TZ, NEG(24)}, /* UTC +6 hours. */
{ZULU, TZ, POS(0)}, /* UTC */
};
static datetkn deltatktbl[] = {
/* text, token, lexval */
{"@", IGNORE_DTF, 0}, /* postgres relative prefix */
{DAGO, AGO, 0}, /* "ago" indicates negative time offset */
{"c", UNITS, DTK_CENTURY}, /* "century" relative */
{"cent", UNITS, DTK_CENTURY}, /* "century" relative */
{"centuries", UNITS, DTK_CENTURY}, /* "centuries" relative */
{DCENTURY, UNITS, DTK_CENTURY}, /* "century" relative */
{"d", UNITS, DTK_DAY}, /* "day" relative */
{DDAY, UNITS, DTK_DAY}, /* "day" relative */
{"days", UNITS, DTK_DAY}, /* "days" relative */
{"dec", UNITS, DTK_DECADE}, /* "decade" relative */
{DDECADE, UNITS, DTK_DECADE}, /* "decade" relative */
{"decades", UNITS, DTK_DECADE}, /* "decades" relative */
{"decs", UNITS, DTK_DECADE}, /* "decades" relative */
{"h", UNITS, DTK_HOUR}, /* "hour" relative */
{DHOUR, UNITS, DTK_HOUR}, /* "hour" relative */
{"hours", UNITS, DTK_HOUR}, /* "hours" relative */
{"hr", UNITS, DTK_HOUR}, /* "hour" relative */
{"hrs", UNITS, DTK_HOUR}, /* "hours" relative */
{INVALID, RESERV, DTK_INVALID}, /* reserved for invalid time */
{"m", UNITS, DTK_MINUTE}, /* "minute" relative */
{"microsecon", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
{"mil", UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
{"millennia", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
{DMILLENNIUM, UNITS, DTK_MILLENNIUM}, /* "millennium" relative */
{"millisecon", UNITS, DTK_MILLISEC}, /* relative */
{"mils", UNITS, DTK_MILLENNIUM}, /* "millennia" relative */
{"min", UNITS, DTK_MINUTE}, /* "minute" relative */
{"mins", UNITS, DTK_MINUTE}, /* "minutes" relative */
{DMINUTE, UNITS, DTK_MINUTE}, /* "minute" relative */
{"minutes", UNITS, DTK_MINUTE}, /* "minutes" relative */
{"mon", UNITS, DTK_MONTH}, /* "months" relative */
{"mons", UNITS, DTK_MONTH}, /* "months" relative */
{DMONTH, UNITS, DTK_MONTH}, /* "month" relative */
{"months", UNITS, DTK_MONTH},
{"ms", UNITS, DTK_MILLISEC},
{"msec", UNITS, DTK_MILLISEC},
{DMILLISEC, UNITS, DTK_MILLISEC},
{"mseconds", UNITS, DTK_MILLISEC},
{"msecs", UNITS, DTK_MILLISEC},
{"qtr", UNITS, DTK_QUARTER}, /* "quarter" relative */
{DQUARTER, UNITS, DTK_QUARTER}, /* "quarter" relative */
{"reltime", IGNORE_DTF, 0}, /* pre-v6.1 "Undefined Reltime" */
{"s", UNITS, DTK_SECOND},
{"sec", UNITS, DTK_SECOND},
{DSECOND, UNITS, DTK_SECOND},
{"seconds", UNITS, DTK_SECOND},
{"secs", UNITS, DTK_SECOND},
{DTIMEZONE, UNITS, DTK_TZ}, /* "timezone" time offset */
{"timezone_h", UNITS, DTK_TZ_HOUR}, /* timezone hour units */
{"timezone_m", UNITS, DTK_TZ_MINUTE}, /* timezone minutes units */
{"undefined", RESERV, DTK_INVALID}, /* pre-v6.1 invalid time */
{"us", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
{"usec", UNITS, DTK_MICROSEC}, /* "microsecond" relative */
{DMICROSEC, UNITS, DTK_MICROSEC}, /* "microsecond" relative */
{"useconds", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
{"usecs", UNITS, DTK_MICROSEC}, /* "microseconds" relative */
{"w", UNITS, DTK_WEEK}, /* "week" relative */
{DWEEK, UNITS, DTK_WEEK}, /* "week" relative */
{"weeks", UNITS, DTK_WEEK}, /* "weeks" relative */
{"y", UNITS, DTK_YEAR}, /* "year" relative */
{DYEAR, UNITS, DTK_YEAR}, /* "year" relative */
{"years", UNITS, DTK_YEAR}, /* "years" relative */
{"yr", UNITS, DTK_YEAR}, /* "year" relative */
{"yrs", UNITS, DTK_YEAR}, /* "years" relative */
};
static unsigned int szdatetktbl = sizeof datetktbl / sizeof datetktbl[0];
static unsigned int szdeltatktbl = sizeof deltatktbl / sizeof deltatktbl[0];
static datetkn *datecache[MAXDATEFIELDS] = {NULL};
static datetkn *deltacache[MAXDATEFIELDS] = {NULL};
char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL};
char *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", NULL};
char *pgtypes_date_weekdays_short[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL};
char *pgtypes_date_months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December", NULL};
static datetkn *
datebsearch(char *key, datetkn *base, unsigned int nel)
{
datetkn *last = base + nel - 1,
*position;
int result;
while (last >= base)
{
position = base + ((last - base) >> 1);
result = key[0] - position->token[0];
if (result == 0)
{
result = strncmp(key, position->token, TOKMAXLEN);
if (result == 0)
return position;
}
if (result < 0)
last = position - 1;
else
base = position + 1;
}
return NULL;
}
/* DecodeUnits()
* Decode text string using lookup table.
* This routine supports time interval decoding.
*/
int
DecodeUnits(int field, char *lowtoken, int *val)
{
int type;
datetkn *tp;
if ((deltacache[field] != NULL)
&& (strncmp(lowtoken, deltacache[field]->token, TOKMAXLEN) == 0))
tp = deltacache[field];
else
tp = datebsearch(lowtoken, deltatktbl, szdeltatktbl);
deltacache[field] = tp;
if (tp == NULL)
{
type = UNKNOWN_FIELD;
*val = 0;
}
else
{
type = tp->type;
if ((type == TZ) || (type == DTZ))
*val = FROMVAL(tp);
else
*val = tp->value;
}
return type;
} /* DecodeUnits() */
/*
* Calendar time to Julian date conversions.
* Julian date is commonly used in astronomical applications,
* since it is numerically accurate and computationally simple.
* The algorithms here will accurately convert between Julian day
* and calendar date for all non-negative Julian days
* (i.e. from Nov 24, -4713 on).
*
* These routines will be used by other date/time packages
* - thomas 97/02/25
*
* Rewritten to eliminate overflow problems. This now allows the
* routines to work correctly for all Julian day counts from
* 0 to 2147483647 (Nov 24, -4713 to Jun 3, 5874898) assuming
* a 32-bit integer. Longer types should also work to the limits
* of their precision.
*/
int
date2j(int y, int m, int d)
{
int julian;
int century;
if (m > 2)
{
m += 1;
y += 4800;
}
else
{
m += 13;
y += 4799;
}
century = y / 100;
julian = y * 365 - 32167;
julian += y / 4 - century + century / 4;
julian += 7834 * m / 256 + d;
return julian;
} /* date2j() */
void
j2date(int jd, int *year, int *month, int *day)
{
unsigned int julian;
unsigned int quad;
unsigned int extra;
int y;
julian = jd;
julian += 32044;
quad = julian / 146097;
extra = (julian - quad * 146097) * 4 + 3;
julian += 60 + quad * 3 + extra / 146097;
quad = julian / 1461;
julian -= quad * 1461;
y = julian * 4 / 1461;
julian = ((y != 0) ? ((julian + 305) % 365) : ((julian + 306) % 366))
+ 123;
y += quad * 4;
*year = y - 4800;
quad = julian * 2141 / 65536;
*day = julian - 7834 * quad / 256;
*month = (quad + 10) % 12 + 1;
return;
} /* j2date() */
int
j2day(int date)
{
unsigned int day;
day = date;
day += 1;
day %= 7;
return (int) day;
} /* j2day() */
/* DecodeSpecial()
* Decode text string using lookup table.
* Implement a cache lookup since it is likely that dates
* will be related in format.
*/
static int
DecodeSpecial(int field, char *lowtoken, int *val)
{
int type;
datetkn *tp;
if ((datecache[field] != NULL)
&& (strncmp(lowtoken, datecache[field]->token, TOKMAXLEN) == 0))
tp = datecache[field];
else
{
tp = NULL;
if (!tp)
tp = datebsearch(lowtoken, datetktbl, szdatetktbl);
}
datecache[field] = tp;
if (tp == NULL)
{
type = UNKNOWN_FIELD;
*val = 0;
}
else
{
type = tp->type;
switch (type)
{
case TZ:
case DTZ:
case DTZMOD:
*val = FROMVAL(tp);
break;
default:
*val = tp->value;
break;
}
}
return type;
} /* DecodeSpecial() */
/* EncodeDateOnly()
* Encode date as local time.
*/
int
EncodeDateOnly(struct tm * tm, int style, char *str, bool EuroDates)
{
if ((tm->tm_mon < 1) || (tm->tm_mon > 12))
return -1;
switch (style)
{
case USE_ISO_DATES:
/* compatible with ISO date formats */
if (tm->tm_year > 0)
sprintf(str, "%04d-%02d-%02d",
tm->tm_year, tm->tm_mon, tm->tm_mday);
else
sprintf(str, "%04d-%02d-%02d %s",
-(tm->tm_year - 1), tm->tm_mon, tm->tm_mday, "BC");
break;
case USE_SQL_DATES:
/* compatible with Oracle/Ingres date formats */
if (EuroDates)
sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
else
sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
if (tm->tm_year > 0)
sprintf((str + 5), "/%04d", tm->tm_year);
else
sprintf((str + 5), "/%04d %s", -(tm->tm_year - 1), "BC");
break;
case USE_GERMAN_DATES:
/* German-style date format */
sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
if (tm->tm_year > 0)
sprintf((str + 5), ".%04d", tm->tm_year);
else
sprintf((str + 5), ".%04d %s", -(tm->tm_year - 1), "BC");
break;
case USE_POSTGRES_DATES:
default:
/* traditional date-only style for Postgres */
if (EuroDates)
sprintf(str, "%02d-%02d", tm->tm_mday, tm->tm_mon);
else
sprintf(str, "%02d-%02d", tm->tm_mon, tm->tm_mday);
if (tm->tm_year > 0)
sprintf((str + 5), "-%04d", tm->tm_year);
else
sprintf((str + 5), "-%04d %s", -(tm->tm_year - 1), "BC");
break;
}
return TRUE;
} /* EncodeDateOnly() */
static void
TrimTrailingZeros(char *str)
{
int len = strlen(str);
/* chop off trailing zeros... but leave at least 2 fractional digits */
while ((*(str + len - 1) == '0') && (*(str + len - 3) != '.'))
{
len--;
*(str + len) = '\0';
}
}
/* EncodeDateTime()
* Encode date and time interpreted as local time.
* Support several date styles:
* Postgres - day mon hh:mm:ss yyyy tz
* SQL - mm/dd/yyyy hh:mm:ss.ss tz
* ISO - yyyy-mm-dd hh:mm:ss+/-tz
* German - dd.mm.yyyy hh:mm:ss tz
* Variants (affects order of month and day for Postgres and SQL styles):
* US - mm/dd/yyyy
* European - dd/mm/yyyy
*/
int
EncodeDateTime(struct tm * tm, fsec_t fsec, int *tzp, char **tzn, int style, char *str, bool EuroDates)
{
int day,
hour,
min;
switch (style)
{
case USE_ISO_DATES:
/* Compatible with ISO-8601 date formats */
sprintf(str, "%04d-%02d-%02d %02d:%02d",
((tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1)),
tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min);
/*
* Print fractional seconds if any. The field widths here
* should be at least equal to MAX_TIMESTAMP_PRECISION.
*
* In float mode, don't print fractional seconds before 1 AD,
* since it's unlikely there's any precision left ...
*/
#ifdef HAVE_INT64_TIMESTAMP
if (fsec != 0)
{
sprintf((str + strlen(str)), ":%02d.%06d", tm->tm_sec, fsec);
#else
if ((fsec != 0) && (tm->tm_year > 0))
{
sprintf((str + strlen(str)), ":%09.6f", tm->tm_sec + fsec);
#endif
TrimTrailingZeros(str);
}
else
sprintf((str + strlen(str)), ":%02d", tm->tm_sec);
if (tm->tm_year <= 0)
sprintf((str + strlen(str)), " BC");
/*
* tzp == NULL indicates that we don't want *any* time zone
* info in the output string. *tzn != NULL indicates that we
* have alpha time zone info available. tm_isdst != -1
* indicates that we have a valid time zone translation.
*/
if ((tzp != NULL) && (tm->tm_isdst >= 0))
{
hour = -(*tzp / 3600);
min = ((abs(*tzp) / 60) % 60);
sprintf((str + strlen(str)), ((min != 0) ? "%+03d:%02d" : "%+03d"), hour, min);
}
break;
case USE_SQL_DATES:
/* Compatible with Oracle/Ingres date formats */
if (EuroDates)
sprintf(str, "%02d/%02d", tm->tm_mday, tm->tm_mon);
else
sprintf(str, "%02d/%02d", tm->tm_mon, tm->tm_mday);
sprintf((str + 5), "/%04d %02d:%02d",
((tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1)),
tm->tm_hour, tm->tm_min);
/*
* Print fractional seconds if any. The field widths here
* should be at least equal to MAX_TIMESTAMP_PRECISION.
*
* In float mode, don't print fractional seconds before 1 AD,
* since it's unlikely there's any precision left ...
*/
#ifdef HAVE_INT64_TIMESTAMP
if (fsec != 0)
{
sprintf((str + strlen(str)), ":%02d.%06d", tm->tm_sec, fsec);
#else
if ((fsec != 0) && (tm->tm_year > 0))
{
sprintf((str + strlen(str)), ":%09.6f", tm->tm_sec + fsec);
#endif
TrimTrailingZeros(str);
}
else
sprintf((str + strlen(str)), ":%02d", tm->tm_sec);
if (tm->tm_year <= 0)
sprintf((str + strlen(str)), " BC");
if ((tzp != NULL) && (tm->tm_isdst >= 0))
{
if (*tzn != NULL)
sprintf((str + strlen(str)), " %.*s", MAXTZLEN, *tzn);
else
{
hour = -(*tzp / 3600);
min = ((abs(*tzp) / 60) % 60);
sprintf((str + strlen(str)), ((min != 0) ? "%+03d:%02d" : "%+03d"), hour, min);
}
}
break;
case USE_GERMAN_DATES:
/* German variant on European style */
sprintf(str, "%02d.%02d", tm->tm_mday, tm->tm_mon);
sprintf((str + 5), ".%04d %02d:%02d",
((tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1)),
tm->tm_hour, tm->tm_min);
/*
* Print fractional seconds if any. The field widths here
* should be at least equal to MAX_TIMESTAMP_PRECISION.
*
* In float mode, don't print fractional seconds before 1 AD,
* since it's unlikely there's any precision left ...
*/
#ifdef HAVE_INT64_TIMESTAMP
if (fsec != 0)
{
sprintf((str + strlen(str)), ":%02d.%06d", tm->tm_sec, fsec);
#else
if ((fsec != 0) && (tm->tm_year > 0))
{
sprintf((str + strlen(str)), ":%09.6f", tm->tm_sec + fsec);
#endif
TrimTrailingZeros(str);
}
else
sprintf((str + strlen(str)), ":%02d", tm->tm_sec);
if (tm->tm_year <= 0)
sprintf((str + strlen(str)), " BC");
if ((tzp != NULL) && (tm->tm_isdst >= 0))
{
if (*tzn != NULL)
sprintf((str + strlen(str)), " %.*s", MAXTZLEN, *tzn);
else
{
hour = -(*tzp / 3600);
min = ((abs(*tzp) / 60) % 60);
sprintf((str + strlen(str)), ((min != 0) ? "%+03d:%02d" : "%+03d"), hour, min);
}
}
break;
case USE_POSTGRES_DATES:
default:
/* Backward-compatible with traditional Postgres abstime dates */
day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
tm->tm_wday = j2day(day);
strncpy(str, days[tm->tm_wday], 3);
strcpy((str + 3), " ");
if (EuroDates)
sprintf((str + 4), "%02d %3s", tm->tm_mday, months[tm->tm_mon - 1]);
else
sprintf((str + 4), "%3s %02d", months[tm->tm_mon - 1], tm->tm_mday);
sprintf((str + 10), " %02d:%02d", tm->tm_hour, tm->tm_min);
/*
* Print fractional seconds if any. The field widths here
* should be at least equal to MAX_TIMESTAMP_PRECISION.
*
* In float mode, don't print fractional seconds before 1 AD,
* since it's unlikely there's any precision left ...
*/
#ifdef HAVE_INT64_TIMESTAMP
if (fsec != 0)
{
sprintf((str + strlen(str)), ":%02d.%06d", tm->tm_sec, fsec);
#else
if ((fsec != 0) && (tm->tm_year > 0))
{
sprintf((str + strlen(str)), ":%09.6f", tm->tm_sec + fsec);
#endif
TrimTrailingZeros(str);
}
else
sprintf((str + strlen(str)), ":%02d", tm->tm_sec);
sprintf((str + strlen(str)), " %04d",
((tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1)));
if (tm->tm_year <= 0)
sprintf((str + strlen(str)), " BC");
if ((tzp != NULL) && (tm->tm_isdst >= 0))
{
if (*tzn != NULL)
sprintf((str + strlen(str)), " %.*s", MAXTZLEN, *tzn);
else
{
/*
* We have a time zone, but no string version. Use the
* numeric form, but be sure to include a leading
* space to avoid formatting something which would be
* rejected by the date/time parser later. - thomas
* 2001-10-19
*/
hour = -(*tzp / 3600);
min = ((abs(*tzp) / 60) % 60);
sprintf((str + strlen(str)), ((min != 0) ? " %+03d:%02d" : " %+03d"), hour, min);
}
}
break;
}
return TRUE;
} /* EncodeDateTime() */
void
GetEpochTime(struct tm * tm)
{
struct tm *t0;
time_t epoch = 0;