/* PostgreSQL Data Base Management System (formerly known as Postgres, then as Postgres95). Copyright (c) 1994-7 Regents of the University of California Permission to use, copy, modify, and distribute this software and its documentation for any purpose, without fee, and without a written agreement is hereby granted, provided that the above copyright notice and this paragraph and the following two paragraphs appear in all copies. IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. */ /*------------------------------------------------------------------------- * * dt.h-- * Definitions for the date/time and other date/time support code. * The support code is shared with other date data types, * including abstime, reltime, date, and time. * * * Copyright (c) 1994, Regents of the University of California * *------------------------------------------------------------------------- */ #ifndef DT_H #define DT_H #include #include /* We have to include stdlib.h here because it defines many of these macros on some platforms, and we only want our definitions used if stdlib.h doesn't have its own. */ #include /* ---------------------------------------------------------------- * Section 1: bool, true, false, TRUE, FALSE * ---------------------------------------------------------------- */ /* * bool -- * Boolean value, either true or false. * */ #define false ((char) 0) #define true ((char) 1) #ifndef __cplusplus #ifndef bool typedef char bool; #endif /* ndef bool */ #endif /* not C++ */ typedef bool *BoolPtr; #ifndef TRUE #define TRUE 1 #endif /* TRUE */ #ifndef FALSE #define FALSE 0 #endif /* FALSE */ /* ---------------------------------------------------------------- * Section 3: standard system types * ---------------------------------------------------------------- */ /* * intN -- * Signed integer, EXACTLY N BITS IN SIZE, * used for numerical computations and the * frontend/backend protocol. */ typedef signed char int8; /* == 8 bits */ typedef signed short int16; /* == 16 bits */ typedef signed int int32; /* == 32 bits */ /* * uintN -- * Unsigned integer, EXACTLY N BITS IN SIZE, * used for numerical computations and the * frontend/backend protocol. */ typedef unsigned char uint8; /* == 8 bits */ typedef unsigned short uint16; /* == 16 bits */ typedef unsigned int uint32; /* == 32 bits */ /* * floatN -- * Floating point number, AT LEAST N BITS IN SIZE, * used for numerical computations. * * Since sizeof(floatN) may be > sizeof(char *), always pass * floatN by reference. */ typedef float float32data; typedef double float64data; typedef float *float32; typedef double *float64; /* * boolN -- * Boolean value, AT LEAST N BITS IN SIZE. */ typedef uint8 bool8; /* >= 8 bits */ typedef uint16 bool16; /* >= 16 bits */ typedef uint32 bool32; /* >= 32 bits */ /* Date/Time Configuration * * Constants to pass info from runtime environment: * USE_POSTGRES_DATES specifies traditional postgres format for output. * USE_ISO_DATES specifies ISO-compliant format for output. * USE_SQL_DATES specified Oracle/Ingres-compliant format for output. * USE_GERMAN_DATES specifies German-style dd.mm/yyyy date format. * * DateStyle specifies preference for date formatting for output. * EuroDates if client prefers dates interpreted and written w/European conventions. * * HasCTZSet if client timezone is specified by client. * CDayLight is the apparent daylight savings time status. * CTimeZone is the timezone offset in seconds. * CTZName is the timezone label. */ #define USE_POSTGRES_DATES 0 #define USE_ISO_DATES 1 #define USE_SQL_DATES 2 #define USE_GERMAN_DATES 3 extern int DateStyle; extern bool EuroDates; extern int CTimeZone; typedef double float8; struct varlena { int vl_len; char vl_dat[1]; }; typedef struct varlena text; typedef int AbsoluteTime; typedef int RelativeTime; /* * Note a leap year is one that is a multiple of 4 * but not of a 100. Except if it is a multiple of * 400 then it is a leap year. */ #define isleap(y) (((y % 4) == 0) && (((y % 100) != 0) || ((y % 400) == 0))) /* * DateTime represents absolute time. * TimeSpan represents delta time. Keep track of months (and years) * separately since the elapsed time spanned is unknown until instantiated * relative to an absolute time. * * Note that Postgres uses "time interval" to mean a bounded interval, * consisting of a beginning and ending time, not a time span - thomas 97/03/20 */ typedef double DateTime; typedef struct { double time; /* all time units other than months and * years */ int month; /* months and years, after time for * alignment */ } TimeSpan; /* ---------------------------------------------------------------- * time types + support macros * * String definitions for standard time quantities. * * These strings are the defaults used to form output time strings. * Other alternate forms are hardcoded into token tables in dt.c. * ---------------------------------------------------------------- */ #define DAGO "ago" #define DCURRENT "current" #define EPOCH "epoch" #define INVALID "invalid" #define EARLY "-infinity" #define LATE "infinity" #define NOW "now" #define TODAY "today" #define TOMORROW "tomorrow" #define YESTERDAY "yesterday" #define ZULU "zulu" #define DMICROSEC "usecond" #define DMILLISEC "msecond" #define DSECOND "second" #define DMINUTE "minute" #define DHOUR "hour" #define DDAY "day" #define DWEEK "week" #define DMONTH "month" #define DQUARTER "quarter" #define DYEAR "year" #define DDECADE "decade" #define DCENTURY "century" #define DMILLENIUM "millenium" #define DA_D "ad" #define DB_C "bc" #define DTIMEZONE "timezone" /* * Fundamental time field definitions for parsing. * * Meridian: am, pm, or 24-hour style. * Millenium: ad, bc */ #define AM 0 #define PM 1 #define HR24 2 #define AD 0 #define BC 1 /* * Fields for time decoding. * Can't have more of these than there are bits in an unsigned int * since these are turned into bit masks during parsing and decoding. */ #define RESERV 0 #define MONTH 1 #define YEAR 2 #define DAY 3 #define TIMES 4 /* not used - thomas 1997-07-14 */ #define TZ 5 #define DTZ 6 #define DTZMOD 7 #define IGNOREFIELD 8 #define AMPM 9 #define HOUR 10 #define MINUTE 11 #define SECOND 12 #define DOY 13 #define DOW 14 #define UNITS 15 #define ADBC 16 /* these are only for relative dates */ #define AGO 17 #define ABS_BEFORE 18 #define ABS_AFTER 19 /* * Token field definitions for time parsing and decoding. * These need to fit into the datetkn table type. * At the moment, that means keep them within [-127,127]. * These are also used for bit masks in DecodeDateDelta() * so actually restrict them to within [0,31] for now. * - thomas 97/06/19 * Not all of these fields are used for masks in DecodeDateDelta * so allow some larger than 31. - thomas 1997-11-17 */ #define DTK_NUMBER 0 #define DTK_STRING 1 #define DTK_DATE 2 #define DTK_TIME 3 #define DTK_TZ 4 #define DTK_AGO 5 #define DTK_SPECIAL 6 #define DTK_INVALID 7 #define DTK_CURRENT 8 #define DTK_EARLY 9 #define DTK_LATE 10 #define DTK_EPOCH 11 #define DTK_NOW 12 #define DTK_YESTERDAY 13 #define DTK_TODAY 14 #define DTK_TOMORROW 15 #define DTK_ZULU 16 #define DTK_DELTA 17 #define DTK_SECOND 18 #define DTK_MINUTE 19 #define DTK_HOUR 20 #define DTK_DAY 21 #define DTK_WEEK 22 #define DTK_MONTH 23 #define DTK_QUARTER 24 #define DTK_YEAR 25 #define DTK_DECADE 26 #define DTK_CENTURY 27 #define DTK_MILLENIUM 28 #define DTK_MILLISEC 29 #define DTK_MICROSEC 30 #define DTK_DOW 32 #define DTK_DOY 33 #define DTK_TZ_HOUR 34 #define DTK_TZ_MINUTE 35 /* * Bit mask definitions for time parsing. */ #define DTK_M(t) (0x01 << (t)) #define DTK_DATE_M (DTK_M(YEAR) | DTK_M(MONTH) | DTK_M(DAY)) #define DTK_TIME_M (DTK_M(HOUR) | DTK_M(MINUTE) | DTK_M(SECOND)) #define MAXDATELEN 47 /* maximum possible length of an input * date string */ #define MAXDATEFIELDS 25 /* maximum possible number of fields in a * date string */ #define TOKMAXLEN 10 /* only this many chars are stored in * datetktbl */ /* keep this struct small; it gets used a lot */ typedef struct { #if defined(_AIX) char *token; #else char token[TOKMAXLEN]; #endif /* _AIX */ char type; char value; /* this may be unsigned, alas */ } datetkn; /* * dt.c prototypes */ void j2date(int jd, int *year, int *month, int *day); int date2j(int year, int month, int day); int ParseDateTime(char *timestr, char *lowstr, char **field, int *ftype, int maxfields, int *numfields); int DecodeDateTime(char **field, int *ftype, int nf, int *dtype, struct tm * tm, double *fsec, int *tzp); int DecodeTimeOnly(char **field, int *ftype, int nf, int *dtype, struct tm * tm, double *fsec); #endif /* DT_H */