mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-03 21:57:20 +02:00
Fix to_char(year) for BC dates. Previously it returned one less than the current year. Add documentation mentioning that there is no 0 AD.
3986 lines
97 KiB
C
3986 lines
97 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* datetime.c
|
|
* Support functions for date/time types.
|
|
*
|
|
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
*
|
|
* IDENTIFICATION
|
|
* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.126 2004/03/30 15:53:18 momjian Exp $
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <float.h>
|
|
#include <limits.h>
|
|
#include <math.h>
|
|
|
|
#include "miscadmin.h"
|
|
#include "utils/datetime.h"
|
|
#include "utils/guc.h"
|
|
|
|
|
|
static int DecodeNumber(int flen, char *field, bool haveTextMonth,
|
|
int fmask, int *tmask,
|
|
struct tm * tm, fsec_t *fsec, int *is2digits);
|
|
static int DecodeNumberField(int len, char *str,
|
|
int fmask, int *tmask,
|
|
struct tm * tm, fsec_t *fsec, int *is2digits);
|
|
static int DecodeTime(char *str, int fmask, int *tmask,
|
|
struct tm * tm, fsec_t *fsec);
|
|
static int DecodeTimezone(char *str, int *tzp);
|
|
static datetkn *datebsearch(char *key, datetkn *base, unsigned int nel);
|
|
static int DecodeDate(char *str, int fmask, int *tmask, struct tm * tm);
|
|
static void TrimTrailingZeros(char *str);
|
|
|
|
|
|
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}};
|
|
|
|
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};
|
|
|
|
|
|
/*****************************************************************************
|
|
* PRIVATE ROUTINES *
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Definitions for squeezing values into "value"
|
|
* We set aside a high bit for a sign, and scale the timezone offsets
|
|
* in minutes by a factor of 15 (so can represent quarter-hour increments).
|
|
*/
|
|
#define ABS_SIGNBIT ((char) 0200)
|
|
#define VALMASK ((char) 0177)
|
|
#define POS(n) (n)
|
|
#define NEG(n) ((n)|ABS_SIGNBIT)
|
|
#define SIGNEDCHAR(c) ((c)&ABS_SIGNBIT? -((c)&VALMASK): (c))
|
|
#define FROMVAL(tp) (-SIGNEDCHAR((tp)->value) * 15) /* uncompress */
|
|
#define TOVAL(tp, v) ((tp)->value = ((v) < 0? NEG((-(v))/15): POS(v)/15))
|
|
|
|
/*
|
|
* datetktbl holds date/time keywords.
|
|
*
|
|
* Note that this table must be strictly alphabetically ordered to allow an
|
|
* O(ln(N)) search algorithm to be used.
|
|
*
|
|
* The text field is NOT guaranteed to be NULL-terminated.
|
|
*
|
|
* To keep this table reasonably small, we divide the lexval for TZ and DTZ
|
|
* entries by 15 (so they are on 15 minute boundaries) and truncate the text
|
|
* field at TOKMAXLEN characters.
|
|
* Formerly, we divided by 10 rather than 15 but there are a few time zones
|
|
* which are 30 or 45 minutes away from an even hour, most are on an hour
|
|
* boundary, and none on other boundaries.
|
|
*
|
|
* Let's include all strings from my current zic time zone database.
|
|
* Not all of them are unique, or even very understandable, so we will
|
|
* leave some commented out for now.
|
|
*/
|
|
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 Summer Time */
|
|
{"act", TZ, NEG(20)}, /* Atlantic/Porto Acre Time */
|
|
{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)}, /* Amazon Summer Time (Porto Velho) */
|
|
#endif
|
|
{"amt", TZ, POS(16)}, /* Armenia Time (Yerevan) */
|
|
#if 0
|
|
{"amt", TZ, NEG(16)}, /* Amazon Time (Porto Velho) */
|
|
#endif
|
|
{"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 */
|
|
{"brst", DTZ, NEG(8)}, /* Brasilia Summer Time */
|
|
{"brt", TZ, NEG(12)}, /* Brasilia Time */
|
|
{"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 */
|
|
{"fnst", DTZ, NEG(4)}, /* Fernando de Noronha Summer Time */
|
|
{"fnt", TZ, NEG(8)}, /* Fernando de Noronha Time */
|
|
{"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)}, /* Greenwich 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)}, /* Myanmar 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 unsigned int szdatetktbl = sizeof datetktbl / sizeof datetktbl[0];
|
|
|
|
/* Used for SET australian_timezones to override North American ones */
|
|
static datetkn australian_datetktbl[] = {
|
|
{"acst", TZ, POS(38)}, /* Cent. Australia */
|
|
{"cst", TZ, POS(42)}, /* Australia Central Std Time */
|
|
{"east", TZ, POS(40)}, /* East Australian Std Time */
|
|
{"est", TZ, POS(40)}, /* Australia Eastern Std Time */
|
|
{"sat", TZ, POS(38)},
|
|
};
|
|
|
|
static unsigned int australian_szdatetktbl = sizeof australian_datetktbl /
|
|
sizeof australian_datetktbl[0];
|
|
|
|
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 szdeltatktbl = sizeof deltatktbl / sizeof deltatktbl[0];
|
|
|
|
static datetkn *datecache[MAXDATEFIELDS] = {NULL};
|
|
|
|
static datetkn *deltacache[MAXDATEFIELDS] = {NULL};
|
|
|
|
|
|
/*
|
|
* 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() */
|
|
|
|
|
|
/*
|
|
* j2day - convert Julian date to day-of-week (0..6 == Sun..Sat)
|
|
*
|
|
* Note: various places use the locution j2day(date - 1) to produce a
|
|
* result according to the convention 0..6 = Mon..Sun. This is a bit of
|
|
* a crock, but will work as long as the computation here is just a modulo.
|
|
*/
|
|
int
|
|
j2day(int date)
|
|
{
|
|
unsigned int day;
|
|
|
|
day = date;
|
|
day += 1;
|
|
day %= 7;
|
|
|
|
return (int) day;
|
|
} /* j2day() */
|
|
|
|
|
|
/* TrimTrailingZeros()
|
|
* ... resulting from printing numbers with full precision.
|
|
*/
|
|
static void
|
|
TrimTrailingZeros(char *str)
|
|
{
|
|
int len = strlen(str);
|
|
|
|
#if 0
|
|
/* chop off trailing one to cope with interval rounding */
|
|
if (strcmp((str + len - 4), "0001") == 0)
|
|
{
|
|
len -= 4;
|
|
*(str + len) = '\0';
|
|
}
|
|
#endif
|
|
|
|
/* chop off trailing zeros... but leave at least 2 fractional digits */
|
|
while ((*(str + len - 1) == '0')
|
|
&& (*(str + len - 3) != '.'))
|
|
{
|
|
len--;
|
|
*(str + len) = '\0';
|
|
}
|
|
}
|
|
|
|
|
|
/* ParseDateTime()
|
|
* Break string into tokens based on a date/time context.
|
|
* Returns 0 if successful, DTERR code if bogus input detected.
|
|
*
|
|
* timestr - the input string
|
|
* lowstr - workspace for field string storage (must be large enough for
|
|
* a copy of the input string, including trailing null)
|
|
* field[] - pointers to field strings are returned in this array
|
|
* ftype[] - field type indicators are returned in this array
|
|
* maxfields - dimensions of the above two arrays
|
|
* *numfields - set to the actual number of fields detected
|
|
*
|
|
* The fields extracted from the input are stored as separate, null-terminated
|
|
* strings in the workspace at lowstr. Any text is converted to lower case.
|
|
*
|
|
* Several field types are assigned:
|
|
* DTK_NUMBER - digits and (possibly) a decimal point
|
|
* DTK_DATE - digits and two delimiters, or digits and text
|
|
* DTK_TIME - digits, colon delimiters, and possibly a decimal point
|
|
* DTK_STRING - text (no digits)
|
|
* DTK_SPECIAL - leading "+" or "-" followed by text
|
|
* DTK_TZ - leading "+" or "-" followed by digits
|
|
*
|
|
* Note that some field types can hold unexpected items:
|
|
* DTK_NUMBER can hold date fields (yy.ddd)
|
|
* DTK_STRING can hold months (January) and time zones (PST)
|
|
* DTK_DATE can hold Posix time zones (GMT-8)
|
|
*/
|
|
int
|
|
ParseDateTime(const char *timestr, char *lowstr,
|
|
char **field, int *ftype, int maxfields, int *numfields)
|
|
{
|
|
int nf = 0;
|
|
const char *cp = timestr;
|
|
char *lp = lowstr;
|
|
|
|
/* outer loop through fields */
|
|
while (*cp != '\0')
|
|
{
|
|
/* Ignore spaces between fields */
|
|
if (isspace((unsigned char) *cp))
|
|
{
|
|
cp++;
|
|
continue;
|
|
}
|
|
|
|
/* Record start of current field */
|
|
if (nf >= maxfields)
|
|
return DTERR_BAD_FORMAT;
|
|
field[nf] = lp;
|
|
|
|
/* leading digit? then date or time */
|
|
if (isdigit((unsigned char) *cp))
|
|
{
|
|
*lp++ = *cp++;
|
|
while (isdigit((unsigned char) *cp))
|
|
*lp++ = *cp++;
|
|
|
|
/* time field? */
|
|
if (*cp == ':')
|
|
{
|
|
ftype[nf] = DTK_TIME;
|
|
*lp++ = *cp++;
|
|
while (isdigit((unsigned char) *cp) ||
|
|
(*cp == ':') || (*cp == '.'))
|
|
*lp++ = *cp++;
|
|
}
|
|
/* date field? allow embedded text month */
|
|
else if ((*cp == '-') || (*cp == '/') || (*cp == '.'))
|
|
{
|
|
/* save delimiting character to use later */
|
|
char delim = *cp;
|
|
|
|
*lp++ = *cp++;
|
|
/* second field is all digits? then no embedded text month */
|
|
if (isdigit((unsigned char) *cp))
|
|
{
|
|
ftype[nf] = ((delim == '.') ? DTK_NUMBER : DTK_DATE);
|
|
while (isdigit((unsigned char) *cp))
|
|
*lp++ = *cp++;
|
|
|
|
/*
|
|
* insist that the delimiters match to get a
|
|
* three-field date.
|
|
*/
|
|
if (*cp == delim)
|
|
{
|
|
ftype[nf] = DTK_DATE;
|
|
*lp++ = *cp++;
|
|
while (isdigit((unsigned char) *cp) || (*cp == delim))
|
|
*lp++ = *cp++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ftype[nf] = DTK_DATE;
|
|
while (isalnum((unsigned char) *cp) || (*cp == delim))
|
|
*lp++ = tolower((unsigned char) *cp++);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* otherwise, number only and will determine year, month, day,
|
|
* or concatenated fields later...
|
|
*/
|
|
else
|
|
ftype[nf] = DTK_NUMBER;
|
|
}
|
|
/* Leading decimal point? Then fractional seconds... */
|
|
else if (*cp == '.')
|
|
{
|
|
*lp++ = *cp++;
|
|
while (isdigit((unsigned char) *cp))
|
|
*lp++ = *cp++;
|
|
|
|
ftype[nf] = DTK_NUMBER;
|
|
}
|
|
|
|
/*
|
|
* text? then date string, month, day of week, special, or
|
|
* timezone
|
|
*/
|
|
else if (isalpha((unsigned char) *cp))
|
|
{
|
|
ftype[nf] = DTK_STRING;
|
|
*lp++ = tolower((unsigned char) *cp++);
|
|
while (isalpha((unsigned char) *cp))
|
|
*lp++ = tolower((unsigned char) *cp++);
|
|
|
|
/*
|
|
* Full date string with leading text month? Could also be a
|
|
* POSIX time zone...
|
|
*/
|
|
if ((*cp == '-') || (*cp == '/') || (*cp == '.'))
|
|
{
|
|
char delim = *cp;
|
|
|
|
ftype[nf] = DTK_DATE;
|
|
*lp++ = *cp++;
|
|
while (isdigit((unsigned char) *cp) || (*cp == delim))
|
|
*lp++ = *cp++;
|
|
}
|
|
}
|
|
/* sign? then special or numeric timezone */
|
|
else if ((*cp == '+') || (*cp == '-'))
|
|
{
|
|
*lp++ = *cp++;
|
|
/* soak up leading whitespace */
|
|
while (isspace((unsigned char) *cp))
|
|
cp++;
|
|
/* numeric timezone? */
|
|
if (isdigit((unsigned char) *cp))
|
|
{
|
|
ftype[nf] = DTK_TZ;
|
|
*lp++ = *cp++;
|
|
while (isdigit((unsigned char) *cp) ||
|
|
(*cp == ':') || (*cp == '.'))
|
|
*lp++ = *cp++;
|
|
}
|
|
/* special? */
|
|
else if (isalpha((unsigned char) *cp))
|
|
{
|
|
ftype[nf] = DTK_SPECIAL;
|
|
*lp++ = tolower((unsigned char) *cp++);
|
|
while (isalpha((unsigned char) *cp))
|
|
*lp++ = tolower((unsigned char) *cp++);
|
|
}
|
|
/* otherwise something wrong... */
|
|
else
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
/* ignore other punctuation but use as delimiter */
|
|
else if (ispunct((unsigned char) *cp))
|
|
{
|
|
cp++;
|
|
continue;
|
|
}
|
|
/* otherwise, something is not right... */
|
|
else
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/* force in a delimiter after each field */
|
|
*lp++ = '\0';
|
|
nf++;
|
|
}
|
|
|
|
*numfields = nf;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* DecodeDateTime()
|
|
* Interpret previously parsed fields for general date and time.
|
|
* Return 0 if full date, 1 if only time, and negative DTERR code if problems.
|
|
* (Currently, all callers treat 1 as an error return too.)
|
|
*
|
|
* External format(s):
|
|
* "<weekday> <month>-<day>-<year> <hour>:<minute>:<second>"
|
|
* "Fri Feb-7-1997 15:23:27"
|
|
* "Feb-7-1997 15:23:27"
|
|
* "2-7-1997 15:23:27"
|
|
* "1997-2-7 15:23:27"
|
|
* "1997.038 15:23:27" (day of year 1-366)
|
|
* Also supports input in compact time:
|
|
* "970207 152327"
|
|
* "97038 152327"
|
|
* "20011225T040506.789-07"
|
|
*
|
|
* Use the system-provided functions to get the current time zone
|
|
* if not specified in the input string.
|
|
* If the date is outside the time_t system-supported time range,
|
|
* then assume UTC time zone. - thomas 1997-05-27
|
|
*/
|
|
int
|
|
DecodeDateTime(char **field, int *ftype, int nf,
|
|
int *dtype, struct tm * tm, fsec_t *fsec, int *tzp)
|
|
{
|
|
int fmask = 0,
|
|
tmask,
|
|
type;
|
|
int ptype = 0; /* "prefix type" for ISO y2001m02d04
|
|
* format */
|
|
int i;
|
|
int val;
|
|
int dterr;
|
|
int mer = HR24;
|
|
bool haveTextMonth = FALSE;
|
|
int is2digits = FALSE;
|
|
int bc = FALSE;
|
|
|
|
/*
|
|
* We'll insist on at least all of the date fields, but initialize the
|
|
* remaining fields in case they are not set later...
|
|
*/
|
|
*dtype = DTK_DATE;
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
*fsec = 0;
|
|
/* don't know daylight savings time status apriori */
|
|
tm->tm_isdst = -1;
|
|
if (tzp != NULL)
|
|
*tzp = 0;
|
|
|
|
for (i = 0; i < nf; i++)
|
|
{
|
|
switch (ftype[i])
|
|
{
|
|
case DTK_DATE:
|
|
/***
|
|
* Integral julian day with attached time zone?
|
|
* All other forms with JD will be separated into
|
|
* distinct fields, so we handle just this case here.
|
|
***/
|
|
if (ptype == DTK_JULIAN)
|
|
{
|
|
char *cp;
|
|
int val;
|
|
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
val = strtol(field[i], &cp, 10);
|
|
|
|
j2date(val, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
|
/* Get the time zone from the end of the string */
|
|
dterr = DecodeTimezone(cp, tzp);
|
|
if (dterr)
|
|
return dterr;
|
|
|
|
tmask = DTK_DATE_M | DTK_TIME_M | DTK_M(TZ);
|
|
ptype = 0;
|
|
break;
|
|
}
|
|
/***
|
|
* Already have a date? Then this might be a POSIX time
|
|
* zone with an embedded dash (e.g. "PST-3" == "EST") or
|
|
* a run-together time with trailing time zone (e.g. hhmmss-zz).
|
|
* - thomas 2001-12-25
|
|
***/
|
|
else if (((fmask & DTK_DATE_M) == DTK_DATE_M)
|
|
|| (ptype != 0))
|
|
{
|
|
/* No time zone accepted? Then quit... */
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
if (isdigit((unsigned char) *field[i]) || ptype != 0)
|
|
{
|
|
char *cp;
|
|
|
|
if (ptype != 0)
|
|
{
|
|
/* Sanity check; should not fail this test */
|
|
if (ptype != DTK_TIME)
|
|
return DTERR_BAD_FORMAT;
|
|
ptype = 0;
|
|
}
|
|
|
|
/*
|
|
* Starts with a digit but we already have a time
|
|
* field? Then we are in trouble with a date and
|
|
* time already...
|
|
*/
|
|
if ((fmask & DTK_TIME_M) == DTK_TIME_M)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
if ((cp = strchr(field[i], '-')) == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/* Get the time zone from the end of the string */
|
|
dterr = DecodeTimezone(cp, tzp);
|
|
if (dterr)
|
|
return dterr;
|
|
*cp = '\0';
|
|
|
|
/*
|
|
* Then read the rest of the field as a
|
|
* concatenated time
|
|
*/
|
|
dterr = DecodeNumberField(strlen(field[i]), field[i],
|
|
fmask,
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
|
|
/*
|
|
* modify tmask after returning from
|
|
* DecodeNumberField()
|
|
*/
|
|
tmask |= DTK_M(TZ);
|
|
}
|
|
else
|
|
{
|
|
dterr = DecodePosixTimezone(field[i], tzp);
|
|
if (dterr)
|
|
return dterr;
|
|
|
|
ftype[i] = DTK_TZ;
|
|
tmask = DTK_M(TZ);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dterr = DecodeDate(field[i], fmask, &tmask, tm);
|
|
if (dterr)
|
|
return dterr;
|
|
}
|
|
break;
|
|
|
|
case DTK_TIME:
|
|
dterr = DecodeTime(field[i], fmask, &tmask, tm, fsec);
|
|
if (dterr)
|
|
return dterr;
|
|
|
|
/*
|
|
* Check upper limit on hours; other limits checked in
|
|
* DecodeTime()
|
|
*/
|
|
if (tm->tm_hour > 23)
|
|
return DTERR_FIELD_OVERFLOW;
|
|
break;
|
|
|
|
case DTK_TZ:
|
|
{
|
|
int tz;
|
|
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
dterr = DecodeTimezone(field[i], &tz);
|
|
if (dterr)
|
|
return dterr;
|
|
|
|
/*
|
|
* Already have a time zone? Then maybe this is the
|
|
* second field of a POSIX time: EST+3 (equivalent to
|
|
* PST)
|
|
*/
|
|
if ((i > 0) && ((fmask & DTK_M(TZ)) != 0)
|
|
&& (ftype[i - 1] == DTK_TZ)
|
|
&& (isalpha((unsigned char) *field[i - 1])))
|
|
{
|
|
*tzp -= tz;
|
|
tmask = 0;
|
|
}
|
|
else
|
|
{
|
|
*tzp = tz;
|
|
tmask = DTK_M(TZ);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DTK_NUMBER:
|
|
|
|
/*
|
|
* Was this an "ISO date" with embedded field labels? An
|
|
* example is "y2001m02d04" - thomas 2001-02-04
|
|
*/
|
|
if (ptype != 0)
|
|
{
|
|
char *cp;
|
|
int val;
|
|
|
|
val = strtol(field[i], &cp, 10);
|
|
|
|
/*
|
|
* only a few kinds are allowed to have an embedded
|
|
* decimal
|
|
*/
|
|
if (*cp == '.')
|
|
switch (ptype)
|
|
{
|
|
case DTK_JULIAN:
|
|
case DTK_TIME:
|
|
case DTK_SECOND:
|
|
break;
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
}
|
|
else if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
switch (ptype)
|
|
{
|
|
case DTK_YEAR:
|
|
tm->tm_year = val;
|
|
tmask = DTK_M(YEAR);
|
|
break;
|
|
|
|
case DTK_MONTH:
|
|
|
|
/*
|
|
* already have a month and hour? then assume
|
|
* minutes
|
|
*/
|
|
if (((fmask & DTK_M(MONTH)) != 0)
|
|
&& ((fmask & DTK_M(HOUR)) != 0))
|
|
{
|
|
tm->tm_min = val;
|
|
tmask = DTK_M(MINUTE);
|
|
}
|
|
else
|
|
{
|
|
tm->tm_mon = val;
|
|
tmask = DTK_M(MONTH);
|
|
}
|
|
break;
|
|
|
|
case DTK_DAY:
|
|
tm->tm_mday = val;
|
|
tmask = DTK_M(DAY);
|
|
break;
|
|
|
|
case DTK_HOUR:
|
|
tm->tm_hour = val;
|
|
tmask = DTK_M(HOUR);
|
|
break;
|
|
|
|
case DTK_MINUTE:
|
|
tm->tm_min = val;
|
|
tmask = DTK_M(MINUTE);
|
|
break;
|
|
|
|
case DTK_SECOND:
|
|
tm->tm_sec = val;
|
|
tmask = DTK_M(SECOND);
|
|
if (*cp == '.')
|
|
{
|
|
double frac;
|
|
|
|
frac = strtod(cp, &cp);
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec = rint(frac * 1000000);
|
|
#else
|
|
*fsec = frac;
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case DTK_TZ:
|
|
tmask = DTK_M(TZ);
|
|
dterr = DecodeTimezone(field[i], tzp);
|
|
if (dterr)
|
|
return dterr;
|
|
break;
|
|
|
|
case DTK_JULIAN:
|
|
/***
|
|
* previous field was a label for "julian date"?
|
|
***/
|
|
tmask = DTK_DATE_M;
|
|
j2date(val, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
|
/* fractional Julian Day? */
|
|
if (*cp == '.')
|
|
{
|
|
double time;
|
|
|
|
time = strtod(cp, &cp);
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
tmask |= DTK_TIME_M;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
dt2time((time * 86400000000),
|
|
&tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
|
|
#else
|
|
dt2time((time * 86400),
|
|
&tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case DTK_TIME:
|
|
/* previous field was "t" for ISO time */
|
|
dterr = DecodeNumberField(strlen(field[i]), field[i],
|
|
(fmask | DTK_DATE_M),
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
|
|
if (tmask != DTK_TIME_M)
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
}
|
|
|
|
ptype = 0;
|
|
*dtype = DTK_DATE;
|
|
}
|
|
else
|
|
{
|
|
char *cp;
|
|
int flen;
|
|
|
|
flen = strlen(field[i]);
|
|
cp = strchr(field[i], '.');
|
|
|
|
/* Embedded decimal and no date yet? */
|
|
if ((cp != NULL) && !(fmask & DTK_DATE_M))
|
|
{
|
|
dterr = DecodeDate(field[i], fmask, &tmask, tm);
|
|
if (dterr)
|
|
return dterr;
|
|
}
|
|
/* embedded decimal and several digits before? */
|
|
else if ((cp != NULL) && ((flen - strlen(cp)) > 2))
|
|
{
|
|
/*
|
|
* Interpret as a concatenated date or time Set
|
|
* the type field to allow decoding other fields
|
|
* later. Example: 20011223 or 040506
|
|
*/
|
|
dterr = DecodeNumberField(flen, field[i], fmask,
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
}
|
|
else if (flen > 4)
|
|
{
|
|
dterr = DecodeNumberField(flen, field[i], fmask,
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
}
|
|
/* otherwise it is a single date/time field... */
|
|
else
|
|
{
|
|
dterr = DecodeNumber(flen, field[i],
|
|
haveTextMonth, fmask,
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr)
|
|
return dterr;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DTK_STRING:
|
|
case DTK_SPECIAL:
|
|
type = DecodeSpecial(i, field[i], &val);
|
|
if (type == IGNORE_DTF)
|
|
continue;
|
|
|
|
tmask = DTK_M(type);
|
|
switch (type)
|
|
{
|
|
case RESERV:
|
|
switch (val)
|
|
{
|
|
case DTK_CURRENT:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("date/time value \"current\" is no longer supported")));
|
|
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
|
|
case DTK_NOW:
|
|
tmask = (DTK_DATE_M | DTK_TIME_M | DTK_M(TZ));
|
|
*dtype = DTK_DATE;
|
|
GetCurrentTimeUsec(tm, fsec, tzp);
|
|
break;
|
|
|
|
case DTK_YESTERDAY:
|
|
tmask = DTK_DATE_M;
|
|
*dtype = DTK_DATE;
|
|
GetCurrentDateTime(tm);
|
|
j2date((date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - 1),
|
|
&tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
break;
|
|
|
|
case DTK_TODAY:
|
|
tmask = DTK_DATE_M;
|
|
*dtype = DTK_DATE;
|
|
GetCurrentDateTime(tm);
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
break;
|
|
|
|
case DTK_TOMORROW:
|
|
tmask = DTK_DATE_M;
|
|
*dtype = DTK_DATE;
|
|
GetCurrentDateTime(tm);
|
|
j2date((date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) + 1),
|
|
&tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
break;
|
|
|
|
case DTK_ZULU:
|
|
tmask = (DTK_TIME_M | DTK_M(TZ));
|
|
*dtype = DTK_DATE;
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
if (tzp != NULL)
|
|
*tzp = 0;
|
|
break;
|
|
|
|
default:
|
|
*dtype = val;
|
|
}
|
|
|
|
break;
|
|
|
|
case MONTH:
|
|
|
|
/*
|
|
* already have a (numeric) month? then see if we
|
|
* can substitute...
|
|
*/
|
|
if ((fmask & DTK_M(MONTH)) && (!haveTextMonth)
|
|
&& (!(fmask & DTK_M(DAY)))
|
|
&& ((tm->tm_mon >= 1) && (tm->tm_mon <= 31)))
|
|
{
|
|
tm->tm_mday = tm->tm_mon;
|
|
tmask = DTK_M(DAY);
|
|
}
|
|
haveTextMonth = TRUE;
|
|
tm->tm_mon = val;
|
|
break;
|
|
|
|
case DTZMOD:
|
|
|
|
/*
|
|
* daylight savings time modifier (solves "MET
|
|
* DST" syntax)
|
|
*/
|
|
tmask |= DTK_M(DTZ);
|
|
tm->tm_isdst = 1;
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
*tzp += val * 60;
|
|
break;
|
|
|
|
case DTZ:
|
|
|
|
/*
|
|
* set mask for TZ here _or_ check for DTZ later
|
|
* when getting default timezone
|
|
*/
|
|
tmask |= DTK_M(TZ);
|
|
tm->tm_isdst = 1;
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
*tzp = val * 60;
|
|
ftype[i] = DTK_TZ;
|
|
break;
|
|
|
|
case TZ:
|
|
tm->tm_isdst = 0;
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
*tzp = val * 60;
|
|
ftype[i] = DTK_TZ;
|
|
break;
|
|
|
|
case IGNORE_DTF:
|
|
break;
|
|
|
|
case AMPM:
|
|
mer = val;
|
|
break;
|
|
|
|
case ADBC:
|
|
bc = (val == BC);
|
|
break;
|
|
|
|
case DOW:
|
|
tm->tm_wday = val;
|
|
break;
|
|
|
|
case UNITS:
|
|
tmask = 0;
|
|
ptype = val;
|
|
break;
|
|
|
|
case ISOTIME:
|
|
|
|
/*
|
|
* This is a filler field "t" indicating that the
|
|
* next field is time. Try to verify that this is
|
|
* sensible.
|
|
*/
|
|
tmask = 0;
|
|
|
|
/* No preceding date? Then quit... */
|
|
if ((fmask & DTK_DATE_M) != DTK_DATE_M)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/***
|
|
* We will need one of the following fields:
|
|
* DTK_NUMBER should be hhmmss.fff
|
|
* DTK_TIME should be hh:mm:ss.fff
|
|
* DTK_DATE should be hhmmss-zz
|
|
***/
|
|
if ((i >= (nf - 1))
|
|
|| ((ftype[i + 1] != DTK_NUMBER)
|
|
&& (ftype[i + 1] != DTK_TIME)
|
|
&& (ftype[i + 1] != DTK_DATE)))
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
ptype = val;
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
if (tmask & fmask)
|
|
return DTERR_BAD_FORMAT;
|
|
fmask |= tmask;
|
|
}
|
|
|
|
if (fmask & DTK_M(YEAR))
|
|
{
|
|
/* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
|
|
if (bc)
|
|
{
|
|
if (tm->tm_year > 0)
|
|
tm->tm_year = -(tm->tm_year - 1);
|
|
else
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
|
|
errmsg("inconsistent use of year %04d and \"BC\"",
|
|
tm->tm_year)));
|
|
}
|
|
else if (is2digits)
|
|
{
|
|
if (tm->tm_year < 70)
|
|
tm->tm_year += 2000;
|
|
else if (tm->tm_year < 100)
|
|
tm->tm_year += 1900;
|
|
}
|
|
}
|
|
|
|
/* now that we have correct year, decode DOY */
|
|
if (fmask & DTK_M(DOY))
|
|
{
|
|
j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
|
|
&tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
|
}
|
|
|
|
/* check for valid month */
|
|
if (fmask & DTK_M(MONTH))
|
|
{
|
|
if (tm->tm_mon < 1 || tm->tm_mon > 12)
|
|
return DTERR_MD_FIELD_OVERFLOW;
|
|
}
|
|
|
|
/* minimal check for valid day */
|
|
if (fmask & DTK_M(DAY))
|
|
{
|
|
if (tm->tm_mday < 1 || tm->tm_mday > 31)
|
|
return DTERR_MD_FIELD_OVERFLOW;
|
|
}
|
|
|
|
if ((mer != HR24) && (tm->tm_hour > 12))
|
|
return DTERR_FIELD_OVERFLOW;
|
|
if ((mer == AM) && (tm->tm_hour == 12))
|
|
tm->tm_hour = 0;
|
|
else if ((mer == PM) && (tm->tm_hour != 12))
|
|
tm->tm_hour += 12;
|
|
|
|
/* do additional checking for full date specs... */
|
|
if (*dtype == DTK_DATE)
|
|
{
|
|
if ((fmask & DTK_DATE_M) != DTK_DATE_M)
|
|
{
|
|
if ((fmask & DTK_TIME_M) == DTK_TIME_M)
|
|
return 1;
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
/*
|
|
* Check for valid day of month, now that we know for sure the
|
|
* month and year. Note we don't use MD_FIELD_OVERFLOW here,
|
|
* since it seems unlikely that "Feb 29" is a YMD-order error.
|
|
*/
|
|
if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
|
|
return DTERR_FIELD_OVERFLOW;
|
|
|
|
/* timezone not specified? then find local timezone if possible */
|
|
if ((tzp != NULL) && (!(fmask & DTK_M(TZ))))
|
|
{
|
|
/*
|
|
* daylight savings time modifier but no standard timezone?
|
|
* then error
|
|
*/
|
|
if (fmask & DTK_M(DTZMOD))
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
*tzp = DetermineLocalTimeZone(tm);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* DetermineLocalTimeZone()
|
|
*
|
|
* Given a struct tm in which tm_year, tm_mon, tm_mday, tm_hour, tm_min, and
|
|
* tm_sec fields are set, attempt to determine the applicable local zone
|
|
* (ie, regular or daylight-savings time) at that time. Set the struct tm's
|
|
* tm_isdst field accordingly, and return the actual timezone offset.
|
|
*
|
|
* Note: this subroutine exists because mktime() has such a spectacular
|
|
* variety of, ahem, odd behaviors on various platforms. We used to try to
|
|
* use mktime() here, but finally gave it up as a bad job. Avoid using
|
|
* mktime() anywhere else.
|
|
*/
|
|
int
|
|
DetermineLocalTimeZone(struct tm * tm)
|
|
{
|
|
int tz;
|
|
|
|
if (HasCTZSet)
|
|
{
|
|
tm->tm_isdst = 0; /* for lack of a better idea */
|
|
tz = CTimeZone;
|
|
}
|
|
else if (IS_VALID_UTIME(tm->tm_year, tm->tm_mon, tm->tm_mday))
|
|
{
|
|
/*
|
|
* First, generate the time_t value corresponding to the given
|
|
* y/m/d/h/m/s taken as GMT time. This will not overflow (at
|
|
* least not for time_t taken as signed) because of the range
|
|
* check we did above.
|
|
*/
|
|
long day,
|
|
mysec,
|
|
locsec,
|
|
delta1,
|
|
delta2;
|
|
time_t mytime;
|
|
struct tm *tx;
|
|
|
|
day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - UNIX_EPOCH_JDATE;
|
|
mysec = tm->tm_sec + (tm->tm_min + (day * 24 + tm->tm_hour) * 60) * 60;
|
|
mytime = (time_t) mysec;
|
|
|
|
/*
|
|
* Use localtime to convert that time_t to broken-down time,
|
|
* and reassemble to get a representation of local time.
|
|
*/
|
|
tx = localtime(&mytime);
|
|
if (!tx)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
|
|
errmsg("timestamp out of range")));
|
|
day = date2j(tx->tm_year + 1900, tx->tm_mon + 1, tx->tm_mday) -
|
|
UNIX_EPOCH_JDATE;
|
|
locsec = tx->tm_sec + (tx->tm_min + (day * 24 + tx->tm_hour) * 60) * 60;
|
|
|
|
/*
|
|
* The local time offset corresponding to that GMT time is now
|
|
* computable as mysec - locsec.
|
|
*/
|
|
delta1 = mysec - locsec;
|
|
|
|
/*
|
|
* However, if that GMT time and the local time we are
|
|
* actually interested in are on opposite sides of a
|
|
* daylight-savings-time transition, then this is not the time
|
|
* offset we want. So, adjust the time_t to be what we think
|
|
* the GMT time corresponding to our target local time is, and
|
|
* repeat the localtime() call and delta calculation.
|
|
*/
|
|
mysec += delta1;
|
|
mytime = (time_t) mysec;
|
|
tx = localtime(&mytime);
|
|
if (!tx)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
|
|
errmsg("timestamp out of range")));
|
|
day = date2j(tx->tm_year + 1900, tx->tm_mon + 1, tx->tm_mday) -
|
|
UNIX_EPOCH_JDATE;
|
|
locsec = tx->tm_sec + (tx->tm_min + (day * 24 + tx->tm_hour) * 60) * 60;
|
|
delta2 = mysec - locsec;
|
|
|
|
/*
|
|
* We may have to do it again to get the correct delta.
|
|
*
|
|
* It might seem we should just loop until we get the same delta
|
|
* twice in a row, but if we've been given an "impossible" local
|
|
* time (in the gap during a spring-forward transition) we'd never
|
|
* get out of the loop. The behavior we want is that "impossible"
|
|
* times are taken as standard time, and also that ambiguous times
|
|
* (during a fall-back transition) are taken as standard time.
|
|
* Therefore, we bias the code to prefer the standard-time solution.
|
|
*/
|
|
if (delta2 != delta1 && tx->tm_isdst != 0)
|
|
{
|
|
mysec += (delta2 - delta1);
|
|
mytime = (time_t) mysec;
|
|
tx = localtime(&mytime);
|
|
if (!tx)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
|
|
errmsg("timestamp out of range")));
|
|
day = date2j(tx->tm_year + 1900, tx->tm_mon + 1, tx->tm_mday) -
|
|
UNIX_EPOCH_JDATE;
|
|
locsec = tx->tm_sec + (tx->tm_min + (day * 24 + tx->tm_hour) * 60) * 60;
|
|
delta2 = mysec - locsec;
|
|
}
|
|
tm->tm_isdst = tx->tm_isdst;
|
|
tz = (int) delta2;
|
|
}
|
|
else
|
|
{
|
|
/* Given date is out of range, so assume UTC */
|
|
tm->tm_isdst = 0;
|
|
tz = 0;
|
|
}
|
|
|
|
return tz;
|
|
}
|
|
|
|
|
|
/* DecodeTimeOnly()
|
|
* Interpret parsed string as time fields only.
|
|
* Returns 0 if successful, DTERR code if bogus input detected.
|
|
*
|
|
* Note that support for time zone is here for
|
|
* SQL92 TIME WITH TIME ZONE, but it reveals
|
|
* bogosity with SQL92 date/time standards, since
|
|
* we must infer a time zone from current time.
|
|
* - thomas 2000-03-10
|
|
* Allow specifying date to get a better time zone,
|
|
* if time zones are allowed. - thomas 2001-12-26
|
|
*/
|
|
int
|
|
DecodeTimeOnly(char **field, int *ftype, int nf,
|
|
int *dtype, struct tm * tm, fsec_t *fsec, int *tzp)
|
|
{
|
|
int fmask = 0,
|
|
tmask,
|
|
type;
|
|
int ptype = 0; /* "prefix type" for ISO h04mm05s06 format */
|
|
int i;
|
|
int val;
|
|
int dterr;
|
|
int is2digits = FALSE;
|
|
int mer = HR24;
|
|
|
|
*dtype = DTK_TIME;
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
*fsec = 0;
|
|
/* don't know daylight savings time status apriori */
|
|
tm->tm_isdst = -1;
|
|
|
|
if (tzp != NULL)
|
|
*tzp = 0;
|
|
|
|
for (i = 0; i < nf; i++)
|
|
{
|
|
switch (ftype[i])
|
|
{
|
|
case DTK_DATE:
|
|
|
|
/*
|
|
* Time zone not allowed? Then should not accept dates or
|
|
* time zones no matter what else!
|
|
*/
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/* Under limited circumstances, we will accept a date... */
|
|
if ((i == 0) && (nf >= 2)
|
|
&& ((ftype[nf - 1] == DTK_DATE)
|
|
|| (ftype[1] == DTK_TIME)))
|
|
{
|
|
dterr = DecodeDate(field[i], fmask, &tmask, tm);
|
|
if (dterr)
|
|
return dterr;
|
|
}
|
|
/* otherwise, this is a time and/or time zone */
|
|
else
|
|
{
|
|
if (isdigit((unsigned char) *field[i]))
|
|
{
|
|
char *cp;
|
|
|
|
/*
|
|
* Starts with a digit but we already have a time
|
|
* field? Then we are in trouble with time
|
|
* already...
|
|
*/
|
|
if ((fmask & DTK_TIME_M) == DTK_TIME_M)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/*
|
|
* Should not get here and fail. Sanity check
|
|
* only...
|
|
*/
|
|
if ((cp = strchr(field[i], '-')) == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/* Get the time zone from the end of the string */
|
|
dterr = DecodeTimezone(cp, tzp);
|
|
if (dterr)
|
|
return dterr;
|
|
*cp = '\0';
|
|
|
|
/*
|
|
* Then read the rest of the field as a
|
|
* concatenated time
|
|
*/
|
|
dterr = DecodeNumberField(strlen(field[i]), field[i],
|
|
(fmask | DTK_DATE_M),
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
|
|
tmask |= DTK_M(TZ);
|
|
}
|
|
else
|
|
{
|
|
dterr = DecodePosixTimezone(field[i], tzp);
|
|
if (dterr)
|
|
return dterr;
|
|
|
|
ftype[i] = DTK_TZ;
|
|
tmask = DTK_M(TZ);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DTK_TIME:
|
|
dterr = DecodeTime(field[i], (fmask | DTK_DATE_M),
|
|
&tmask, tm, fsec);
|
|
if (dterr)
|
|
return dterr;
|
|
break;
|
|
|
|
case DTK_TZ:
|
|
{
|
|
int tz;
|
|
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
dterr = DecodeTimezone(field[i], &tz);
|
|
if (dterr)
|
|
return dterr;
|
|
|
|
/*
|
|
* Already have a time zone? Then maybe this is the
|
|
* second field of a POSIX time: EST+3 (equivalent to
|
|
* PST)
|
|
*/
|
|
if ((i > 0) && ((fmask & DTK_M(TZ)) != 0)
|
|
&& (ftype[i - 1] == DTK_TZ) && (isalpha((unsigned char) *field[i - 1])))
|
|
{
|
|
*tzp -= tz;
|
|
tmask = 0;
|
|
}
|
|
else
|
|
{
|
|
*tzp = tz;
|
|
tmask = DTK_M(TZ);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DTK_NUMBER:
|
|
|
|
/*
|
|
* Was this an "ISO time" with embedded field labels? An
|
|
* example is "h04m05s06" - thomas 2001-02-04
|
|
*/
|
|
if (ptype != 0)
|
|
{
|
|
char *cp;
|
|
int val;
|
|
|
|
/* Only accept a date under limited circumstances */
|
|
switch (ptype)
|
|
{
|
|
case DTK_JULIAN:
|
|
case DTK_YEAR:
|
|
case DTK_MONTH:
|
|
case DTK_DAY:
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
val = strtol(field[i], &cp, 10);
|
|
|
|
/*
|
|
* only a few kinds are allowed to have an embedded
|
|
* decimal
|
|
*/
|
|
if (*cp == '.')
|
|
switch (ptype)
|
|
{
|
|
case DTK_JULIAN:
|
|
case DTK_TIME:
|
|
case DTK_SECOND:
|
|
break;
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
}
|
|
else if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
switch (ptype)
|
|
{
|
|
case DTK_YEAR:
|
|
tm->tm_year = val;
|
|
tmask = DTK_M(YEAR);
|
|
break;
|
|
|
|
case DTK_MONTH:
|
|
|
|
/*
|
|
* already have a month and hour? then assume
|
|
* minutes
|
|
*/
|
|
if (((fmask & DTK_M(MONTH)) != 0)
|
|
&& ((fmask & DTK_M(HOUR)) != 0))
|
|
{
|
|
tm->tm_min = val;
|
|
tmask = DTK_M(MINUTE);
|
|
}
|
|
else
|
|
{
|
|
tm->tm_mon = val;
|
|
tmask = DTK_M(MONTH);
|
|
}
|
|
break;
|
|
|
|
case DTK_DAY:
|
|
tm->tm_mday = val;
|
|
tmask = DTK_M(DAY);
|
|
break;
|
|
|
|
case DTK_HOUR:
|
|
tm->tm_hour = val;
|
|
tmask = DTK_M(HOUR);
|
|
break;
|
|
|
|
case DTK_MINUTE:
|
|
tm->tm_min = val;
|
|
tmask = DTK_M(MINUTE);
|
|
break;
|
|
|
|
case DTK_SECOND:
|
|
tm->tm_sec = val;
|
|
tmask = DTK_M(SECOND);
|
|
if (*cp == '.')
|
|
{
|
|
double frac;
|
|
|
|
frac = strtod(cp, &cp);
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec = rint(frac * 1000000);
|
|
#else
|
|
*fsec = frac;
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case DTK_TZ:
|
|
tmask = DTK_M(TZ);
|
|
dterr = DecodeTimezone(field[i], tzp);
|
|
if (dterr)
|
|
return dterr;
|
|
break;
|
|
|
|
case DTK_JULIAN:
|
|
/***
|
|
* previous field was a label for "julian date"?
|
|
***/
|
|
tmask = DTK_DATE_M;
|
|
j2date(val, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
|
if (*cp == '.')
|
|
{
|
|
double time;
|
|
|
|
time = strtod(cp, &cp);
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
tmask |= DTK_TIME_M;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
dt2time((time * 86400000000),
|
|
&tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
|
|
#else
|
|
dt2time((time * 86400),
|
|
&tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case DTK_TIME:
|
|
/* previous field was "t" for ISO time */
|
|
dterr = DecodeNumberField(strlen(field[i]), field[i],
|
|
(fmask | DTK_DATE_M),
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
|
|
if (tmask != DTK_TIME_M)
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
}
|
|
|
|
ptype = 0;
|
|
*dtype = DTK_DATE;
|
|
}
|
|
else
|
|
{
|
|
char *cp;
|
|
int flen;
|
|
|
|
flen = strlen(field[i]);
|
|
cp = strchr(field[i], '.');
|
|
|
|
/* Embedded decimal? */
|
|
if (cp != NULL)
|
|
{
|
|
/*
|
|
* Under limited circumstances, we will accept a
|
|
* date...
|
|
*/
|
|
if ((i == 0) && ((nf >= 2) && (ftype[nf - 1] == DTK_DATE)))
|
|
{
|
|
dterr = DecodeDate(field[i], fmask, &tmask, tm);
|
|
if (dterr)
|
|
return dterr;
|
|
}
|
|
/* embedded decimal and several digits before? */
|
|
else if ((flen - strlen(cp)) > 2)
|
|
{
|
|
/*
|
|
* Interpret as a concatenated date or time
|
|
* Set the type field to allow decoding other
|
|
* fields later. Example: 20011223 or 040506
|
|
*/
|
|
dterr = DecodeNumberField(flen, field[i],
|
|
(fmask | DTK_DATE_M),
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
}
|
|
else
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
else if (flen > 4)
|
|
{
|
|
dterr = DecodeNumberField(flen, field[i],
|
|
(fmask | DTK_DATE_M),
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
ftype[i] = dterr;
|
|
}
|
|
/* otherwise it is a single date/time field... */
|
|
else
|
|
{
|
|
dterr = DecodeNumber(flen, field[i],
|
|
FALSE,
|
|
(fmask | DTK_DATE_M),
|
|
&tmask, tm,
|
|
fsec, &is2digits);
|
|
if (dterr)
|
|
return dterr;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DTK_STRING:
|
|
case DTK_SPECIAL:
|
|
type = DecodeSpecial(i, field[i], &val);
|
|
if (type == IGNORE_DTF)
|
|
continue;
|
|
|
|
tmask = DTK_M(type);
|
|
switch (type)
|
|
{
|
|
case RESERV:
|
|
switch (val)
|
|
{
|
|
case DTK_CURRENT:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("date/time value \"current\" is no longer supported")));
|
|
return DTERR_BAD_FORMAT;
|
|
break;
|
|
|
|
case DTK_NOW:
|
|
tmask = DTK_TIME_M;
|
|
*dtype = DTK_TIME;
|
|
GetCurrentTimeUsec(tm, fsec, NULL);
|
|
break;
|
|
|
|
case DTK_ZULU:
|
|
tmask = (DTK_TIME_M | DTK_M(TZ));
|
|
*dtype = DTK_TIME;
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
tm->tm_isdst = 0;
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
break;
|
|
|
|
case DTZMOD:
|
|
|
|
/*
|
|
* daylight savings time modifier (solves "MET
|
|
* DST" syntax)
|
|
*/
|
|
tmask |= DTK_M(DTZ);
|
|
tm->tm_isdst = 1;
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
*tzp += val * 60;
|
|
break;
|
|
|
|
case DTZ:
|
|
|
|
/*
|
|
* set mask for TZ here _or_ check for DTZ later
|
|
* when getting default timezone
|
|
*/
|
|
tmask |= DTK_M(TZ);
|
|
tm->tm_isdst = 1;
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
*tzp = val * 60;
|
|
ftype[i] = DTK_TZ;
|
|
break;
|
|
|
|
case TZ:
|
|
tm->tm_isdst = 0;
|
|
if (tzp == NULL)
|
|
return DTERR_BAD_FORMAT;
|
|
*tzp = val * 60;
|
|
ftype[i] = DTK_TZ;
|
|
break;
|
|
|
|
case IGNORE_DTF:
|
|
break;
|
|
|
|
case AMPM:
|
|
mer = val;
|
|
break;
|
|
|
|
case UNITS:
|
|
tmask = 0;
|
|
ptype = val;
|
|
break;
|
|
|
|
case ISOTIME:
|
|
tmask = 0;
|
|
|
|
/***
|
|
* We will need one of the following fields:
|
|
* DTK_NUMBER should be hhmmss.fff
|
|
* DTK_TIME should be hh:mm:ss.fff
|
|
* DTK_DATE should be hhmmss-zz
|
|
***/
|
|
if ((i >= (nf - 1))
|
|
|| ((ftype[i + 1] != DTK_NUMBER)
|
|
&& (ftype[i + 1] != DTK_TIME)
|
|
&& (ftype[i + 1] != DTK_DATE)))
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
ptype = val;
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
if (tmask & fmask)
|
|
return DTERR_BAD_FORMAT;
|
|
fmask |= tmask;
|
|
}
|
|
|
|
if ((mer != HR24) && (tm->tm_hour > 12))
|
|
return DTERR_FIELD_OVERFLOW;
|
|
if ((mer == AM) && (tm->tm_hour == 12))
|
|
tm->tm_hour = 0;
|
|
else if ((mer == PM) && (tm->tm_hour != 12))
|
|
tm->tm_hour += 12;
|
|
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
if ((tm->tm_hour < 0) || (tm->tm_hour > 23)
|
|
|| (tm->tm_min < 0) || (tm->tm_min > 59)
|
|
|| (tm->tm_sec < 0) || (tm->tm_sec > 60)
|
|
|| (*fsec < INT64CONST(0)) || (*fsec >= INT64CONST(1000000)))
|
|
return DTERR_FIELD_OVERFLOW;
|
|
#else
|
|
if ((tm->tm_hour < 0) || (tm->tm_hour > 23)
|
|
|| (tm->tm_min < 0) || (tm->tm_min > 59)
|
|
|| (tm->tm_sec < 0) || (tm->tm_sec > 60)
|
|
|| (*fsec < 0) || (*fsec >= 1))
|
|
return DTERR_FIELD_OVERFLOW;
|
|
#endif
|
|
|
|
if ((fmask & DTK_TIME_M) != DTK_TIME_M)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/* timezone not specified? then find local timezone if possible */
|
|
if ((tzp != NULL) && (!(fmask & DTK_M(TZ))))
|
|
{
|
|
struct tm tt,
|
|
*tmp = &tt;
|
|
|
|
/*
|
|
* daylight savings time modifier but no standard timezone? then
|
|
* error
|
|
*/
|
|
if (fmask & DTK_M(DTZMOD))
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
if ((fmask & DTK_DATE_M) == 0)
|
|
GetCurrentDateTime(tmp);
|
|
else
|
|
{
|
|
tmp->tm_year = tm->tm_year;
|
|
tmp->tm_mon = tm->tm_mon;
|
|
tmp->tm_mday = tm->tm_mday;
|
|
}
|
|
tmp->tm_hour = tm->tm_hour;
|
|
tmp->tm_min = tm->tm_min;
|
|
tmp->tm_sec = tm->tm_sec;
|
|
*tzp = DetermineLocalTimeZone(tmp);
|
|
tm->tm_isdst = tmp->tm_isdst;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* DecodeDate()
|
|
* Decode date string which includes delimiters.
|
|
* Return 0 if okay, a DTERR code if not.
|
|
*
|
|
* Insist on a complete set of fields.
|
|
*/
|
|
static int
|
|
DecodeDate(char *str, int fmask, int *tmask, struct tm * tm)
|
|
{
|
|
fsec_t fsec;
|
|
int nf = 0;
|
|
int i,
|
|
len;
|
|
int dterr;
|
|
bool haveTextMonth = FALSE;
|
|
int bc = FALSE;
|
|
int is2digits = FALSE;
|
|
int type,
|
|
val,
|
|
dmask = 0;
|
|
char *field[MAXDATEFIELDS];
|
|
|
|
/* parse this string... */
|
|
while ((*str != '\0') && (nf < MAXDATEFIELDS))
|
|
{
|
|
/* skip field separators */
|
|
while (!isalnum((unsigned char) *str))
|
|
str++;
|
|
|
|
field[nf] = str;
|
|
if (isdigit((unsigned char) *str))
|
|
{
|
|
while (isdigit((unsigned char) *str))
|
|
str++;
|
|
}
|
|
else if (isalpha((unsigned char) *str))
|
|
{
|
|
while (isalpha((unsigned char) *str))
|
|
str++;
|
|
}
|
|
|
|
/* Just get rid of any non-digit, non-alpha characters... */
|
|
if (*str != '\0')
|
|
*str++ = '\0';
|
|
nf++;
|
|
}
|
|
|
|
#if 0
|
|
/* don't allow too many fields */
|
|
if (nf > 3)
|
|
return DTERR_BAD_FORMAT;
|
|
#endif
|
|
|
|
*tmask = 0;
|
|
|
|
/* look first for text fields, since that will be unambiguous month */
|
|
for (i = 0; i < nf; i++)
|
|
{
|
|
if (isalpha((unsigned char) *field[i]))
|
|
{
|
|
type = DecodeSpecial(i, field[i], &val);
|
|
if (type == IGNORE_DTF)
|
|
continue;
|
|
|
|
dmask = DTK_M(type);
|
|
switch (type)
|
|
{
|
|
case MONTH:
|
|
tm->tm_mon = val;
|
|
haveTextMonth = TRUE;
|
|
break;
|
|
|
|
case ADBC:
|
|
bc = (val == BC);
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
if (fmask & dmask)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
fmask |= dmask;
|
|
*tmask |= dmask;
|
|
|
|
/* mark this field as being completed */
|
|
field[i] = NULL;
|
|
}
|
|
}
|
|
|
|
/* now pick up remaining numeric fields */
|
|
for (i = 0; i < nf; i++)
|
|
{
|
|
if (field[i] == NULL)
|
|
continue;
|
|
|
|
if ((len = strlen(field[i])) <= 0)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
dterr = DecodeNumber(len, field[i], haveTextMonth, fmask,
|
|
&dmask, tm,
|
|
&fsec, &is2digits);
|
|
if (dterr)
|
|
return dterr;
|
|
|
|
if (fmask & dmask)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
fmask |= dmask;
|
|
*tmask |= dmask;
|
|
}
|
|
|
|
if ((fmask & ~(DTK_M(DOY) | DTK_M(TZ))) != DTK_DATE_M)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/* there is no year zero in AD/BC notation; i.e. "1 BC" == year 0 */
|
|
if (bc)
|
|
{
|
|
if (tm->tm_year > 0)
|
|
tm->tm_year = -(tm->tm_year - 1);
|
|
else
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
|
|
errmsg("inconsistent use of year %04d and \"BC\"",
|
|
tm->tm_year)));
|
|
}
|
|
else if (is2digits)
|
|
{
|
|
if (tm->tm_year < 70)
|
|
tm->tm_year += 2000;
|
|
else if (tm->tm_year < 100)
|
|
tm->tm_year += 1900;
|
|
}
|
|
|
|
/* now that we have correct year, decode DOY */
|
|
if (fmask & DTK_M(DOY))
|
|
{
|
|
j2date(date2j(tm->tm_year, 1, 1) + tm->tm_yday - 1,
|
|
&tm->tm_year, &tm->tm_mon, &tm->tm_mday);
|
|
}
|
|
|
|
/* check for valid month */
|
|
if (tm->tm_mon < 1 || tm->tm_mon > 12)
|
|
return DTERR_MD_FIELD_OVERFLOW;
|
|
|
|
/* check for valid day */
|
|
if (tm->tm_mday < 1 || tm->tm_mday > 31)
|
|
return DTERR_MD_FIELD_OVERFLOW;
|
|
|
|
/* We don't want to hint about DateStyle for Feb 29 */
|
|
if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
|
|
return DTERR_FIELD_OVERFLOW;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* DecodeTime()
|
|
* Decode time string which includes delimiters.
|
|
* Return 0 if okay, a DTERR code if not.
|
|
*
|
|
* Only check the lower limit on hours, since this same code
|
|
* can be used to represent time spans.
|
|
*/
|
|
static int
|
|
DecodeTime(char *str, int fmask, int *tmask, struct tm * tm, fsec_t *fsec)
|
|
{
|
|
char *cp;
|
|
|
|
*tmask = DTK_TIME_M;
|
|
|
|
tm->tm_hour = strtol(str, &cp, 10);
|
|
if (*cp != ':')
|
|
return DTERR_BAD_FORMAT;
|
|
str = cp + 1;
|
|
tm->tm_min = strtol(str, &cp, 10);
|
|
if (*cp == '\0')
|
|
{
|
|
tm->tm_sec = 0;
|
|
*fsec = 0;
|
|
}
|
|
else if (*cp != ':')
|
|
return DTERR_BAD_FORMAT;
|
|
else
|
|
{
|
|
str = cp + 1;
|
|
tm->tm_sec = strtol(str, &cp, 10);
|
|
if (*cp == '\0')
|
|
*fsec = 0;
|
|
else if (*cp == '.')
|
|
{
|
|
double frac;
|
|
|
|
str = cp;
|
|
frac = strtod(str, &cp);
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec = rint(frac * 1000000);
|
|
#else
|
|
*fsec = frac;
|
|
#endif
|
|
}
|
|
else
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
/* do a sanity check */
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
if ((tm->tm_hour < 0)
|
|
|| (tm->tm_min < 0) || (tm->tm_min > 59)
|
|
|| (tm->tm_sec < 0) || (tm->tm_sec > 60)
|
|
|| (*fsec < INT64CONST(0)) || (*fsec >= INT64CONST(1000000)))
|
|
return DTERR_FIELD_OVERFLOW;
|
|
#else
|
|
if ((tm->tm_hour < 0)
|
|
|| (tm->tm_min < 0) || (tm->tm_min > 59)
|
|
|| (tm->tm_sec < 0) || (tm->tm_sec > 60)
|
|
|| (*fsec < 0) || (*fsec >= 1))
|
|
return DTERR_FIELD_OVERFLOW;
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* DecodeNumber()
|
|
* Interpret plain numeric field as a date value in context.
|
|
* Return 0 if okay, a DTERR code if not.
|
|
*/
|
|
static int
|
|
DecodeNumber(int flen, char *str, bool haveTextMonth, int fmask,
|
|
int *tmask, struct tm * tm, fsec_t *fsec, int *is2digits)
|
|
{
|
|
int val;
|
|
char *cp;
|
|
int dterr;
|
|
|
|
*tmask = 0;
|
|
|
|
val = strtol(str, &cp, 10);
|
|
if (cp == str)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
if (*cp == '.')
|
|
{
|
|
double frac;
|
|
|
|
/*
|
|
* More than two digits before decimal point? Then could be a date
|
|
* or a run-together time: 2001.360 20011225 040506.789
|
|
*/
|
|
if ((cp - str) > 2)
|
|
{
|
|
dterr = DecodeNumberField(flen, str,
|
|
(fmask | DTK_DATE_M),
|
|
tmask, tm,
|
|
fsec, is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
return 0;
|
|
}
|
|
|
|
frac = strtod(cp, &cp);
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec = rint(frac * 1000000);
|
|
#else
|
|
*fsec = frac;
|
|
#endif
|
|
}
|
|
else if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
/* Special case for day of year */
|
|
if ((flen == 3) &&
|
|
((fmask & DTK_DATE_M) == DTK_M(YEAR)) &&
|
|
((val >= 1) && (val <= 366)))
|
|
{
|
|
*tmask = (DTK_M(DOY) | DTK_M(MONTH) | DTK_M(DAY));
|
|
tm->tm_yday = val;
|
|
/* tm_mon and tm_mday can't actually be set yet ... */
|
|
return 0;
|
|
}
|
|
|
|
/* Switch based on what we have so far */
|
|
switch (fmask & DTK_DATE_M)
|
|
{
|
|
case 0:
|
|
|
|
/*
|
|
* Nothing so far; make a decision about what we think the
|
|
* input is. There used to be lots of heuristics here, but
|
|
* the consensus now is to be paranoid. It *must* be either
|
|
* YYYY-MM-DD (with a more-than-two-digit year field), or the
|
|
* field order defined by DateOrder.
|
|
*/
|
|
if (flen >= 3 || DateOrder == DATEORDER_YMD)
|
|
{
|
|
*tmask = DTK_M(YEAR);
|
|
tm->tm_year = val;
|
|
}
|
|
else if (DateOrder == DATEORDER_DMY)
|
|
{
|
|
*tmask = DTK_M(DAY);
|
|
tm->tm_mday = val;
|
|
}
|
|
else
|
|
{
|
|
*tmask = DTK_M(MONTH);
|
|
tm->tm_mon = val;
|
|
}
|
|
break;
|
|
|
|
case (DTK_M(YEAR)):
|
|
/* Must be at second field of YY-MM-DD */
|
|
*tmask = DTK_M(MONTH);
|
|
tm->tm_mon = val;
|
|
break;
|
|
|
|
case (DTK_M(MONTH)):
|
|
if (haveTextMonth)
|
|
{
|
|
/*
|
|
* We are at the first numeric field of a date that included
|
|
* a textual month name. We want to support the variants
|
|
* MON-DD-YYYY, DD-MON-YYYY, and YYYY-MON-DD as unambiguous
|
|
* inputs. We will also accept MON-DD-YY or DD-MON-YY in
|
|
* either DMY or MDY modes, as well as YY-MON-DD in YMD mode.
|
|
*/
|
|
if (flen >= 3 || DateOrder == DATEORDER_YMD)
|
|
{
|
|
*tmask = DTK_M(YEAR);
|
|
tm->tm_year = val;
|
|
}
|
|
else
|
|
{
|
|
*tmask = DTK_M(DAY);
|
|
tm->tm_mday = val;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Must be at second field of MM-DD-YY */
|
|
*tmask = DTK_M(DAY);
|
|
tm->tm_mday = val;
|
|
}
|
|
break;
|
|
|
|
case (DTK_M(YEAR) | DTK_M(MONTH)):
|
|
if (haveTextMonth)
|
|
{
|
|
/* Need to accept DD-MON-YYYY even in YMD mode */
|
|
if (flen >= 3 && *is2digits)
|
|
{
|
|
/* Guess that first numeric field is day was wrong */
|
|
*tmask = DTK_M(DAY); /* YEAR is already set */
|
|
tm->tm_mday = tm->tm_year;
|
|
tm->tm_year = val;
|
|
*is2digits = FALSE;
|
|
}
|
|
else
|
|
{
|
|
*tmask = DTK_M(DAY);
|
|
tm->tm_mday = val;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Must be at third field of YY-MM-DD */
|
|
*tmask = DTK_M(DAY);
|
|
tm->tm_mday = val;
|
|
}
|
|
break;
|
|
|
|
case (DTK_M(DAY)):
|
|
/* Must be at second field of DD-MM-YY */
|
|
*tmask = DTK_M(MONTH);
|
|
tm->tm_mon = val;
|
|
break;
|
|
|
|
case (DTK_M(MONTH) | DTK_M(DAY)):
|
|
/* Must be at third field of DD-MM-YY or MM-DD-YY */
|
|
*tmask = DTK_M(YEAR);
|
|
tm->tm_year = val;
|
|
break;
|
|
|
|
case (DTK_M(YEAR) | DTK_M(MONTH) | DTK_M(DAY)):
|
|
/* we have all the date, so it must be a time field */
|
|
dterr = DecodeNumberField(flen, str, fmask,
|
|
tmask, tm,
|
|
fsec, is2digits);
|
|
if (dterr < 0)
|
|
return dterr;
|
|
return 0;
|
|
|
|
default:
|
|
/* Anything else is bogus input */
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
/*
|
|
* When processing a year field, mark it for adjustment if it's
|
|
* only one or two digits.
|
|
*/
|
|
if (*tmask == DTK_M(YEAR))
|
|
*is2digits = (flen <= 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* DecodeNumberField()
|
|
* Interpret numeric string as a concatenated date or time field.
|
|
* Return a DTK token (>= 0) if successful, a DTERR code (< 0) if not.
|
|
*
|
|
* Use the context of previously decoded fields to help with
|
|
* the interpretation.
|
|
*/
|
|
static int
|
|
DecodeNumberField(int len, char *str, int fmask,
|
|
int *tmask, struct tm * tm, fsec_t *fsec, int *is2digits)
|
|
{
|
|
char *cp;
|
|
|
|
/*
|
|
* Have a decimal point? Then this is a date or something with a
|
|
* seconds field...
|
|
*/
|
|
if ((cp = strchr(str, '.')) != NULL)
|
|
{
|
|
double frac;
|
|
|
|
frac = strtod(cp, NULL);
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec = rint(frac * 1000000);
|
|
#else
|
|
*fsec = frac;
|
|
#endif
|
|
*cp = '\0';
|
|
len = strlen(str);
|
|
}
|
|
/* No decimal point and no complete date yet? */
|
|
else if ((fmask & DTK_DATE_M) != DTK_DATE_M)
|
|
{
|
|
/* yyyymmdd? */
|
|
if (len == 8)
|
|
{
|
|
*tmask = DTK_DATE_M;
|
|
|
|
tm->tm_mday = atoi(str + 6);
|
|
*(str + 6) = '\0';
|
|
tm->tm_mon = atoi(str + 4);
|
|
*(str + 4) = '\0';
|
|
tm->tm_year = atoi(str + 0);
|
|
|
|
return DTK_DATE;
|
|
}
|
|
/* yymmdd? */
|
|
else if (len == 6)
|
|
{
|
|
*tmask = DTK_DATE_M;
|
|
tm->tm_mday = atoi(str + 4);
|
|
*(str + 4) = '\0';
|
|
tm->tm_mon = atoi(str + 2);
|
|
*(str + 2) = '\0';
|
|
tm->tm_year = atoi(str + 0);
|
|
*is2digits = TRUE;
|
|
|
|
return DTK_DATE;
|
|
}
|
|
}
|
|
|
|
/* not all time fields are specified? */
|
|
if ((fmask & DTK_TIME_M) != DTK_TIME_M)
|
|
{
|
|
/* hhmmss */
|
|
if (len == 6)
|
|
{
|
|
*tmask = DTK_TIME_M;
|
|
tm->tm_sec = atoi(str + 4);
|
|
*(str + 4) = '\0';
|
|
tm->tm_min = atoi(str + 2);
|
|
*(str + 2) = '\0';
|
|
tm->tm_hour = atoi(str + 0);
|
|
|
|
return DTK_TIME;
|
|
}
|
|
/* hhmm? */
|
|
else if (len == 4)
|
|
{
|
|
*tmask = DTK_TIME_M;
|
|
tm->tm_sec = 0;
|
|
tm->tm_min = atoi(str + 2);
|
|
*(str + 2) = '\0';
|
|
tm->tm_hour = atoi(str + 0);
|
|
|
|
return DTK_TIME;
|
|
}
|
|
}
|
|
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
|
|
/* DecodeTimezone()
|
|
* Interpret string as a numeric timezone.
|
|
*
|
|
* Return 0 if okay (and set *tzp), a DTERR code if not okay.
|
|
*
|
|
* NB: this must *not* ereport on failure; see commands/variable.c.
|
|
*
|
|
* Note: we allow timezone offsets up to 13:59. There are places that
|
|
* use +1300 summer time.
|
|
*/
|
|
static int
|
|
DecodeTimezone(char *str, int *tzp)
|
|
{
|
|
int tz;
|
|
int hr,
|
|
min;
|
|
char *cp;
|
|
|
|
/* leading character must be "+" or "-" */
|
|
if (*str != '+' && *str != '-')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
hr = strtol((str + 1), &cp, 10);
|
|
|
|
/* explicit delimiter? */
|
|
if (*cp == ':')
|
|
min = strtol((cp + 1), &cp, 10);
|
|
/* otherwise, might have run things together... */
|
|
else if ((*cp == '\0') && (strlen(str) > 3))
|
|
{
|
|
min = hr % 100;
|
|
hr = hr / 100;
|
|
}
|
|
else
|
|
min = 0;
|
|
|
|
if ((hr < 0) || (hr > 13))
|
|
return DTERR_TZDISP_OVERFLOW;
|
|
if ((min < 0) || (min >= 60))
|
|
return DTERR_TZDISP_OVERFLOW;
|
|
|
|
tz = (hr * 60 + min) * 60;
|
|
if (*str == '-')
|
|
tz = -tz;
|
|
|
|
*tzp = -tz;
|
|
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* DecodePosixTimezone()
|
|
* Interpret string as a POSIX-compatible timezone:
|
|
* PST-hh:mm
|
|
* PST+h
|
|
* PST
|
|
* - thomas 2000-03-15
|
|
*
|
|
* Return 0 if okay (and set *tzp), a DTERR code if not okay.
|
|
*
|
|
* NB: this must *not* ereport on failure; see commands/variable.c.
|
|
*/
|
|
int
|
|
DecodePosixTimezone(char *str, int *tzp)
|
|
{
|
|
int val,
|
|
tz;
|
|
int type;
|
|
int dterr;
|
|
char *cp;
|
|
char delim;
|
|
|
|
/* advance over name part */
|
|
cp = str;
|
|
while (*cp && isalpha((unsigned char) *cp))
|
|
cp++;
|
|
|
|
/* decode offset, if present */
|
|
if (*cp)
|
|
{
|
|
dterr = DecodeTimezone(cp, &tz);
|
|
if (dterr)
|
|
return dterr;
|
|
}
|
|
else
|
|
tz = 0;
|
|
|
|
/* decode name part. We must temporarily scribble on the input! */
|
|
delim = *cp;
|
|
*cp = '\0';
|
|
type = DecodeSpecial(MAXDATEFIELDS - 1, str, &val);
|
|
*cp = delim;
|
|
|
|
switch (type)
|
|
{
|
|
case DTZ:
|
|
case TZ:
|
|
*tzp = (val * 60) - tz;
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* DecodeSpecial()
|
|
* Decode text string using lookup table.
|
|
*
|
|
* Implement a cache lookup since it is likely that dates
|
|
* will be related in format.
|
|
*
|
|
* NB: this must *not* ereport on failure;
|
|
* see commands/variable.c.
|
|
*/
|
|
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 (Australian_timezones)
|
|
tp = datebsearch(lowtoken, australian_datetktbl,
|
|
australian_szdatetktbl);
|
|
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;
|
|
}
|
|
|
|
|
|
/* DecodeInterval()
|
|
* Interpret previously parsed fields for general time interval.
|
|
* Returns 0 if successful, DTERR code if bogus input detected.
|
|
*
|
|
* Allow "date" field DTK_DATE since this could be just
|
|
* an unsigned floating point number. - thomas 1997-11-16
|
|
*
|
|
* Allow ISO-style time span, with implicit units on number of days
|
|
* preceding an hh:mm:ss field. - thomas 1998-04-30
|
|
*/
|
|
int
|
|
DecodeInterval(char **field, int *ftype, int nf, int *dtype, struct tm * tm, fsec_t *fsec)
|
|
{
|
|
int is_before = FALSE;
|
|
char *cp;
|
|
int fmask = 0,
|
|
tmask,
|
|
type;
|
|
int i;
|
|
int dterr;
|
|
int val;
|
|
double fval;
|
|
|
|
*dtype = DTK_DELTA;
|
|
|
|
type = IGNORE_DTF;
|
|
tm->tm_year = 0;
|
|
tm->tm_mon = 0;
|
|
tm->tm_mday = 0;
|
|
tm->tm_hour = 0;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
*fsec = 0;
|
|
|
|
/* read through list backwards to pick up units before values */
|
|
for (i = nf - 1; i >= 0; i--)
|
|
{
|
|
switch (ftype[i])
|
|
{
|
|
case DTK_TIME:
|
|
dterr = DecodeTime(field[i], fmask, &tmask, tm, fsec);
|
|
if (dterr)
|
|
return dterr;
|
|
type = DTK_DAY;
|
|
break;
|
|
|
|
case DTK_TZ:
|
|
|
|
/*
|
|
* Timezone is a token with a leading sign character and
|
|
* otherwise the same as a non-signed time field
|
|
*/
|
|
Assert((*field[i] == '-') || (*field[i] == '+'));
|
|
|
|
/*
|
|
* A single signed number ends up here, but will be
|
|
* rejected by DecodeTime(). So, work this out to drop
|
|
* through to DTK_NUMBER, which *can* tolerate this.
|
|
*/
|
|
cp = field[i] + 1;
|
|
while ((*cp != '\0') && (*cp != ':') && (*cp != '.'))
|
|
cp++;
|
|
if ((*cp == ':') &&
|
|
(DecodeTime(field[i] + 1, fmask, &tmask, tm, fsec) == 0))
|
|
{
|
|
if (*field[i] == '-')
|
|
{
|
|
/* flip the sign on all fields */
|
|
tm->tm_hour = -tm->tm_hour;
|
|
tm->tm_min = -tm->tm_min;
|
|
tm->tm_sec = -tm->tm_sec;
|
|
*fsec = -(*fsec);
|
|
}
|
|
|
|
/*
|
|
* Set the next type to be a day, if units are not
|
|
* specified. This handles the case of '1 +02:03'
|
|
* since we are reading right to left.
|
|
*/
|
|
type = DTK_DAY;
|
|
tmask = DTK_M(TZ);
|
|
break;
|
|
}
|
|
else if (type == IGNORE_DTF)
|
|
{
|
|
if (*cp == '.')
|
|
{
|
|
/*
|
|
* Got a decimal point? Then assume some sort of
|
|
* seconds specification
|
|
*/
|
|
type = DTK_SECOND;
|
|
}
|
|
else if (*cp == '\0')
|
|
{
|
|
/*
|
|
* Only a signed integer? Then must assume a
|
|
* timezone-like usage
|
|
*/
|
|
type = DTK_HOUR;
|
|
}
|
|
}
|
|
/* DROP THROUGH */
|
|
|
|
case DTK_DATE:
|
|
case DTK_NUMBER:
|
|
val = strtol(field[i], &cp, 10);
|
|
|
|
if (type == IGNORE_DTF)
|
|
type = DTK_SECOND;
|
|
|
|
if (*cp == '.')
|
|
{
|
|
fval = strtod(cp, &cp);
|
|
if (*cp != '\0')
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
if (*field[i] == '-')
|
|
fval = -(fval);
|
|
}
|
|
else if (*cp == '\0')
|
|
fval = 0;
|
|
else
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
tmask = 0; /* DTK_M(type); */
|
|
|
|
switch (type)
|
|
{
|
|
case DTK_MICROSEC:
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += (val + fval);
|
|
#else
|
|
*fsec += ((val + fval) * 1e-6);
|
|
#endif
|
|
break;
|
|
|
|
case DTK_MILLISEC:
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += ((val + fval) * 1000);
|
|
#else
|
|
*fsec += ((val + fval) * 1e-3);
|
|
#endif
|
|
break;
|
|
|
|
case DTK_SECOND:
|
|
tm->tm_sec += val;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += (fval * 1000000);
|
|
#else
|
|
*fsec += fval;
|
|
#endif
|
|
tmask = DTK_M(SECOND);
|
|
break;
|
|
|
|
case DTK_MINUTE:
|
|
tm->tm_min += val;
|
|
if (fval != 0)
|
|
{
|
|
int sec;
|
|
|
|
fval *= 60;
|
|
sec = fval;
|
|
tm->tm_sec += sec;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += ((fval - sec) * 1000000);
|
|
#else
|
|
*fsec += (fval - sec);
|
|
#endif
|
|
}
|
|
tmask = DTK_M(MINUTE);
|
|
break;
|
|
|
|
case DTK_HOUR:
|
|
tm->tm_hour += val;
|
|
if (fval != 0)
|
|
{
|
|
int sec;
|
|
|
|
fval *= 3600;
|
|
sec = fval;
|
|
tm->tm_sec += sec;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += ((fval - sec) * 1000000);
|
|
#else
|
|
*fsec += (fval - sec);
|
|
#endif
|
|
}
|
|
tmask = DTK_M(HOUR);
|
|
break;
|
|
|
|
case DTK_DAY:
|
|
tm->tm_mday += val;
|
|
if (fval != 0)
|
|
{
|
|
int sec;
|
|
|
|
fval *= 86400;
|
|
sec = fval;
|
|
tm->tm_sec += sec;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += ((fval - sec) * 1000000);
|
|
#else
|
|
*fsec += (fval - sec);
|
|
#endif
|
|
}
|
|
tmask = ((fmask & DTK_M(DAY)) ? 0 : DTK_M(DAY));
|
|
break;
|
|
|
|
case DTK_WEEK:
|
|
tm->tm_mday += val * 7;
|
|
if (fval != 0)
|
|
{
|
|
int sec;
|
|
|
|
fval *= (7 * 86400);
|
|
sec = fval;
|
|
tm->tm_sec += sec;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += ((fval - sec) * 1000000);
|
|
#else
|
|
*fsec += (fval - sec);
|
|
#endif
|
|
}
|
|
tmask = ((fmask & DTK_M(DAY)) ? 0 : DTK_M(DAY));
|
|
break;
|
|
|
|
case DTK_MONTH:
|
|
tm->tm_mon += val;
|
|
if (fval != 0)
|
|
{
|
|
int sec;
|
|
|
|
fval *= (30 * 86400);
|
|
sec = fval;
|
|
tm->tm_sec += sec;
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
*fsec += ((fval - sec) * 1000000);
|
|
#else
|
|
*fsec += (fval - sec);
|
|
#endif
|
|
}
|
|
tmask = DTK_M(MONTH);
|
|
break;
|
|
|
|
case DTK_YEAR:
|
|
tm->tm_year += val;
|
|
if (fval != 0)
|
|
tm->tm_mon += (fval * 12);
|
|
tmask = ((fmask & DTK_M(YEAR)) ? 0 : DTK_M(YEAR));
|
|
break;
|
|
|
|
case DTK_DECADE:
|
|
tm->tm_year += val * 10;
|
|
if (fval != 0)
|
|
tm->tm_mon += (fval * 120);
|
|
tmask = ((fmask & DTK_M(YEAR)) ? 0 : DTK_M(YEAR));
|
|
break;
|
|
|
|
case DTK_CENTURY:
|
|
tm->tm_year += val * 100;
|
|
if (fval != 0)
|
|
tm->tm_mon += (fval * 1200);
|
|
tmask = ((fmask & DTK_M(YEAR)) ? 0 : DTK_M(YEAR));
|
|
break;
|
|
|
|
case DTK_MILLENNIUM:
|
|
tm->tm_year += val * 1000;
|
|
if (fval != 0)
|
|
tm->tm_mon += (fval * 12000);
|
|
tmask = ((fmask & DTK_M(YEAR)) ? 0 : DTK_M(YEAR));
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
break;
|
|
|
|
case DTK_STRING:
|
|
case DTK_SPECIAL:
|
|
type = DecodeUnits(i, field[i], &val);
|
|
if (type == IGNORE_DTF)
|
|
continue;
|
|
|
|
tmask = 0; /* DTK_M(type); */
|
|
switch (type)
|
|
{
|
|
case UNITS:
|
|
type = val;
|
|
break;
|
|
|
|
case AGO:
|
|
is_before = TRUE;
|
|
type = val;
|
|
break;
|
|
|
|
case RESERV:
|
|
tmask = (DTK_DATE_M || DTK_TIME_M);
|
|
*dtype = val;
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return DTERR_BAD_FORMAT;
|
|
}
|
|
|
|
if (tmask & fmask)
|
|
return DTERR_BAD_FORMAT;
|
|
fmask |= tmask;
|
|
}
|
|
|
|
if (*fsec != 0)
|
|
{
|
|
int sec;
|
|
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
sec = (*fsec / INT64CONST(1000000));
|
|
*fsec -= (sec * INT64CONST(1000000));
|
|
#else
|
|
TMODULO(*fsec, sec, 1e0);
|
|
#endif
|
|
tm->tm_sec += sec;
|
|
}
|
|
|
|
if (is_before)
|
|
{
|
|
*fsec = -(*fsec);
|
|
tm->tm_sec = -(tm->tm_sec);
|
|
tm->tm_min = -(tm->tm_min);
|
|
tm->tm_hour = -(tm->tm_hour);
|
|
tm->tm_mday = -(tm->tm_mday);
|
|
tm->tm_mon = -(tm->tm_mon);
|
|
tm->tm_year = -(tm->tm_year);
|
|
}
|
|
|
|
/* ensure that at least one time field has been found */
|
|
if (fmask == 0)
|
|
return DTERR_BAD_FORMAT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* 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() */
|
|
|
|
/*
|
|
* Report an error detected by one of the datetime input processing routines.
|
|
*
|
|
* dterr is the error code, str is the original input string, datatype is
|
|
* the name of the datatype we were trying to accept.
|
|
*
|
|
* Note: it might seem useless to distinguish DTERR_INTERVAL_OVERFLOW and
|
|
* DTERR_TZDISP_OVERFLOW from DTERR_FIELD_OVERFLOW, but SQL99 mandates three
|
|
* separate SQLSTATE codes, so ...
|
|
*/
|
|
void
|
|
DateTimeParseError(int dterr, const char *str, const char *datatype)
|
|
{
|
|
switch (dterr)
|
|
{
|
|
case DTERR_FIELD_OVERFLOW:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
|
|
errmsg("date/time field value out of range: \"%s\"",
|
|
str)));
|
|
break;
|
|
case DTERR_MD_FIELD_OVERFLOW:
|
|
/* <nanny>same as above, but add hint about DateStyle</nanny> */
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
|
|
errmsg("date/time field value out of range: \"%s\"",
|
|
str),
|
|
errhint("Perhaps you need a different \"datestyle\" setting.")));
|
|
break;
|
|
case DTERR_INTERVAL_OVERFLOW:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERVAL_FIELD_OVERFLOW),
|
|
errmsg("interval field value out of range: \"%s\"",
|
|
str)));
|
|
break;
|
|
case DTERR_TZDISP_OVERFLOW:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_TIME_ZONE_DISPLACEMENT_VALUE),
|
|
errmsg("time zone displacement out of range: \"%s\"",
|
|
str)));
|
|
break;
|
|
case DTERR_BAD_FORMAT:
|
|
default:
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
|
|
errmsg("invalid input syntax for type %s: \"%s\"",
|
|
datatype, str)));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* datebsearch()
|
|
* Binary search -- from Knuth (6.2.1) Algorithm B. Special case like this
|
|
* is WAY faster than the generic bsearch().
|
|
*/
|
|
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;
|
|
}
|
|
|
|
|
|
/* EncodeDateOnly()
|
|
* Encode date as local time.
|
|
*/
|
|
int
|
|
EncodeDateOnly(struct tm * tm, int style, char *str)
|
|
{
|
|
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 (DateOrder == DATEORDER_DMY)
|
|
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 (DateOrder == DATEORDER_DMY)
|
|
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() */
|
|
|
|
|
|
/* EncodeTimeOnly()
|
|
* Encode time fields only.
|
|
*/
|
|
int
|
|
EncodeTimeOnly(struct tm * tm, fsec_t fsec, int *tzp, int style, char *str)
|
|
{
|
|
if ((tm->tm_hour < 0) || (tm->tm_hour > 24))
|
|
return -1;
|
|
|
|
sprintf(str, "%02d:%02d", tm->tm_hour, tm->tm_min);
|
|
|
|
/*
|
|
* Print fractional seconds if any. The field widths here should be
|
|
* at least equal to the larger of MAX_TIME_PRECISION and
|
|
* MAX_TIMESTAMP_PRECISION.
|
|
*/
|
|
if (fsec != 0)
|
|
{
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
sprintf((str + strlen(str)), ":%02d.%06d", tm->tm_sec, fsec);
|
|
#else
|
|
sprintf((str + strlen(str)), ":%013.10f", tm->tm_sec + fsec);
|
|
#endif
|
|
/* chop off trailing pairs of zeros... */
|
|
while ((strcmp((str + strlen(str) - 2), "00") == 0)
|
|
&& (*(str + strlen(str) - 3) != '.'))
|
|
*(str + strlen(str) - 2) = '\0';
|
|
}
|
|
else
|
|
sprintf((str + strlen(str)), ":%02d", tm->tm_sec);
|
|
|
|
if (tzp != NULL)
|
|
{
|
|
int hour,
|
|
min;
|
|
|
|
hour = -(*tzp / 3600);
|
|
min = ((abs(*tzp) / 60) % 60);
|
|
sprintf((str + strlen(str)), ((min != 0) ? "%+03d:%02d" : "%+03d"), hour, min);
|
|
}
|
|
|
|
return TRUE;
|
|
} /* EncodeTimeOnly() */
|
|
|
|
|
|
/* 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)
|
|
{
|
|
int day,
|
|
hour,
|
|
min;
|
|
|
|
/*
|
|
* Why are we checking only the month field? Change this to an
|
|
* assert... if ((tm->tm_mon < 1) || (tm->tm_mon > 12)) return -1;
|
|
*/
|
|
Assert((tm->tm_mon >= 1) && (tm->tm_mon <= 12));
|
|
|
|
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 (DateOrder == DATEORDER_DMY)
|
|
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 (DateOrder == DATEORDER_DMY)
|
|
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() */
|
|
|
|
|
|
/* EncodeInterval()
|
|
* Interpret time structure as a delta time and convert to string.
|
|
*
|
|
* Support "traditional Postgres" and ISO-8601 styles.
|
|
* Actually, afaik ISO does not address time interval formatting,
|
|
* but this looks similar to the spec for absolute date/time.
|
|
* - thomas 1998-04-30
|
|
*/
|
|
int
|
|
EncodeInterval(struct tm * tm, fsec_t fsec, int style, char *str)
|
|
{
|
|
int is_before = FALSE;
|
|
int is_nonzero = FALSE;
|
|
char *cp = str;
|
|
|
|
/*
|
|
* The sign of year and month are guaranteed to match, since they are
|
|
* stored internally as "month". But we'll need to check for is_before
|
|
* and is_nonzero when determining the signs of hour/minute/seconds
|
|
* fields.
|
|
*/
|
|
switch (style)
|
|
{
|
|
/* compatible with ISO date formats */
|
|
case USE_ISO_DATES:
|
|
if (tm->tm_year != 0)
|
|
{
|
|
sprintf(cp, "%d year%s",
|
|
tm->tm_year, ((tm->tm_year != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
is_before = (tm->tm_year < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
|
|
if (tm->tm_mon != 0)
|
|
{
|
|
sprintf(cp, "%s%s%d mon%s", (is_nonzero ? " " : ""),
|
|
((is_before && (tm->tm_mon > 0)) ? "+" : ""),
|
|
tm->tm_mon, ((tm->tm_mon != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
is_before = (tm->tm_mon < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
|
|
if (tm->tm_mday != 0)
|
|
{
|
|
sprintf(cp, "%s%s%d day%s", (is_nonzero ? " " : ""),
|
|
((is_before && (tm->tm_mday > 0)) ? "+" : ""),
|
|
tm->tm_mday, ((tm->tm_mday != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
is_before = (tm->tm_mday < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
|
|
if ((!is_nonzero) || (tm->tm_hour != 0) || (tm->tm_min != 0)
|
|
|| (tm->tm_sec != 0) || (fsec != 0))
|
|
{
|
|
int minus = ((tm->tm_hour < 0) || (tm->tm_min < 0)
|
|
|| (tm->tm_sec < 0) || (fsec < 0));
|
|
|
|
sprintf(cp, "%s%s%02d:%02d", (is_nonzero ? " " : ""),
|
|
(minus ? "-" : (is_before ? "+" : "")),
|
|
abs(tm->tm_hour), abs(tm->tm_min));
|
|
cp += strlen(cp);
|
|
/* Mark as "non-zero" since the fields are now filled in */
|
|
is_nonzero = TRUE;
|
|
|
|
/* need fractional seconds? */
|
|
if (fsec != 0)
|
|
{
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
sprintf(cp, ":%02d", abs(tm->tm_sec));
|
|
cp += strlen(cp);
|
|
sprintf(cp, ".%06d", ((fsec >= 0) ? fsec : -(fsec)));
|
|
#else
|
|
fsec += tm->tm_sec;
|
|
sprintf(cp, ":%013.10f", fabs(fsec));
|
|
#endif
|
|
TrimTrailingZeros(cp);
|
|
cp += strlen(cp);
|
|
}
|
|
else
|
|
{
|
|
sprintf(cp, ":%02d", abs(tm->tm_sec));
|
|
cp += strlen(cp);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case USE_POSTGRES_DATES:
|
|
default:
|
|
strcpy(cp, "@ ");
|
|
cp += strlen(cp);
|
|
|
|
if (tm->tm_year != 0)
|
|
{
|
|
int year = tm->tm_year;
|
|
|
|
if (tm->tm_year < 0)
|
|
year = -year;
|
|
|
|
sprintf(cp, "%d year%s", year,
|
|
((year != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
is_before = (tm->tm_year < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
|
|
if (tm->tm_mon != 0)
|
|
{
|
|
int mon = tm->tm_mon;
|
|
|
|
if (is_before || ((!is_nonzero) && (tm->tm_mon < 0)))
|
|
mon = -mon;
|
|
|
|
sprintf(cp, "%s%d mon%s", (is_nonzero ? " " : ""), mon,
|
|
((mon != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
if (!is_nonzero)
|
|
is_before = (tm->tm_mon < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
|
|
if (tm->tm_mday != 0)
|
|
{
|
|
int day = tm->tm_mday;
|
|
|
|
if (is_before || ((!is_nonzero) && (tm->tm_mday < 0)))
|
|
day = -day;
|
|
|
|
sprintf(cp, "%s%d day%s", (is_nonzero ? " " : ""), day,
|
|
((day != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
if (!is_nonzero)
|
|
is_before = (tm->tm_mday < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
if (tm->tm_hour != 0)
|
|
{
|
|
int hour = tm->tm_hour;
|
|
|
|
if (is_before || ((!is_nonzero) && (tm->tm_hour < 0)))
|
|
hour = -hour;
|
|
|
|
sprintf(cp, "%s%d hour%s", (is_nonzero ? " " : ""), hour,
|
|
((hour != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
if (!is_nonzero)
|
|
is_before = (tm->tm_hour < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
|
|
if (tm->tm_min != 0)
|
|
{
|
|
int min = tm->tm_min;
|
|
|
|
if (is_before || ((!is_nonzero) && (tm->tm_min < 0)))
|
|
min = -min;
|
|
|
|
sprintf(cp, "%s%d min%s", (is_nonzero ? " " : ""), min,
|
|
((min != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
if (!is_nonzero)
|
|
is_before = (tm->tm_min < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
|
|
/* fractional seconds? */
|
|
if (fsec != 0)
|
|
{
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
if (is_before || ((!is_nonzero) && (tm->tm_sec < 0)))
|
|
tm->tm_sec = -tm->tm_sec;
|
|
sprintf(cp, "%s%d.%02d secs", (is_nonzero ? " " : ""),
|
|
tm->tm_sec, (((int) fsec) / 10000));
|
|
cp += strlen(cp);
|
|
if (!is_nonzero)
|
|
is_before = (fsec < 0);
|
|
#else
|
|
fsec_t sec;
|
|
|
|
fsec += tm->tm_sec;
|
|
sec = fsec;
|
|
if (is_before || ((!is_nonzero) && (fsec < 0)))
|
|
sec = -sec;
|
|
|
|
sprintf(cp, "%s%.2f secs", (is_nonzero ? " " : ""), sec);
|
|
cp += strlen(cp);
|
|
if (!is_nonzero)
|
|
is_before = (fsec < 0);
|
|
#endif
|
|
is_nonzero = TRUE;
|
|
|
|
/* otherwise, integer seconds only? */
|
|
}
|
|
else if (tm->tm_sec != 0)
|
|
{
|
|
int sec = tm->tm_sec;
|
|
|
|
if (is_before || ((!is_nonzero) && (tm->tm_sec < 0)))
|
|
sec = -sec;
|
|
|
|
sprintf(cp, "%s%d sec%s", (is_nonzero ? " " : ""), sec,
|
|
((sec != 1) ? "s" : ""));
|
|
cp += strlen(cp);
|
|
if (!is_nonzero)
|
|
is_before = (tm->tm_sec < 0);
|
|
is_nonzero = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* identically zero? then put in a unitless zero... */
|
|
if (!is_nonzero)
|
|
{
|
|
strcat(cp, "0");
|
|
cp += strlen(cp);
|
|
}
|
|
|
|
if (is_before && (style == USE_POSTGRES_DATES))
|
|
{
|
|
strcat(cp, " ago");
|
|
cp += strlen(cp);
|
|
}
|
|
|
|
return 0;
|
|
} /* EncodeInterval() */
|
|
|
|
|
|
/* GUC assign_hook for australian_timezones */
|
|
bool
|
|
ClearDateCache(bool newval, bool doit, GucSource source)
|
|
{
|
|
int i;
|
|
|
|
if (doit)
|
|
{
|
|
for (i = 0; i < MAXDATEFIELDS; i++)
|
|
datecache[i] = NULL;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* We've been burnt by stupid errors in the ordering of the datetkn tables
|
|
* once too often. Arrange to check them during postmaster start.
|
|
*/
|
|
static bool
|
|
CheckDateTokenTable(const char *tablename, datetkn *base, unsigned int nel)
|
|
{
|
|
bool ok = true;
|
|
unsigned int i;
|
|
|
|
for (i = 1; i < nel; i++)
|
|
{
|
|
if (strncmp(base[i - 1].token, base[i].token, TOKMAXLEN) >= 0)
|
|
{
|
|
elog(LOG, "ordering error in %s table: \"%.*s\" >= \"%.*s\"",
|
|
tablename,
|
|
TOKMAXLEN, base[i - 1].token,
|
|
TOKMAXLEN, base[i].token);
|
|
ok = false;
|
|
}
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
bool
|
|
CheckDateTokenTables(void)
|
|
{
|
|
bool ok = true;
|
|
|
|
Assert(UNIX_EPOCH_JDATE == date2j(1970, 1, 1));
|
|
Assert(POSTGRES_EPOCH_JDATE == date2j(2000, 1, 1));
|
|
|
|
ok &= CheckDateTokenTable("datetktbl", datetktbl, szdatetktbl);
|
|
ok &= CheckDateTokenTable("deltatktbl", deltatktbl, szdeltatktbl);
|
|
ok &= CheckDateTokenTable("australian_datetktbl",
|
|
australian_datetktbl,
|
|
australian_szdatetktbl);
|
|
return ok;
|
|
}
|