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nabstime.h
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/*------------------------------------------------------------------------- * * nabstime.h * Definitions for the "new" abstime code. * * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/utils/nabstime.h * *------------------------------------------------------------------------- */ #ifndef NABSTIME_H #define NABSTIME_H #include <limits.h> #include "fmgr.h" #include "pgtime.h" /* ---------------------------------------------------------------- * * time types + support macros * * ---------------------------------------------------------------- */ /* * Although time_t generally is a long int on 64 bit systems, these two * types must be 4 bytes, because that's what pg_type.h assumes. They * should be yanked (long) before 2038 and be replaced by timestamp and * interval. */ typedef int32 AbsoluteTime; typedef int32 RelativeTime; typedef struct { int32 status; AbsoluteTime data[2]; } TimeIntervalData; typedef TimeIntervalData *TimeInterval; /* * Macros for fmgr-callable functions. */ #define DatumGetAbsoluteTime(X) ((AbsoluteTime) DatumGetInt32(X)) #define DatumGetRelativeTime(X) ((RelativeTime) DatumGetInt32(X)) #define DatumGetTimeInterval(X) ((TimeInterval) DatumGetPointer(X)) #define AbsoluteTimeGetDatum(X) Int32GetDatum(X) #define RelativeTimeGetDatum(X) Int32GetDatum(X) #define TimeIntervalGetDatum(X) PointerGetDatum(X) #define PG_GETARG_ABSOLUTETIME(n) DatumGetAbsoluteTime(PG_GETARG_DATUM(n)) #define PG_GETARG_RELATIVETIME(n) DatumGetRelativeTime(PG_GETARG_DATUM(n)) #define PG_GETARG_TIMEINTERVAL(n) DatumGetTimeInterval(PG_GETARG_DATUM(n)) #define PG_RETURN_ABSOLUTETIME(x) return AbsoluteTimeGetDatum(x) #define PG_RETURN_RELATIVETIME(x) return RelativeTimeGetDatum(x) #define PG_RETURN_TIMEINTERVAL(x) return TimeIntervalGetDatum(x) /* * Reserved values * Epoch is Unix system time zero, but needs to be kept as a reserved * value rather than converting to time since timezone calculations * might move it away from 1970-01-01 00:00:00Z - tgl 97/02/20 * * Pre-v6.1 code had large decimal numbers for reserved values. * These were chosen as special 32-bit bit patterns, * so redefine them explicitly using these bit patterns. - tgl 97/02/24 */ #define INVALID_ABSTIME ((AbsoluteTime) 0x7FFFFFFE) /* 2147483647 (2^31 - 1) */ #define NOEND_ABSTIME ((AbsoluteTime) 0x7FFFFFFC) /* 2147483645 (2^31 - 3) */ #define NOSTART_ABSTIME ((AbsoluteTime) INT_MIN) /* -2147483648 */ #define INVALID_RELTIME ((RelativeTime) 0x7FFFFFFE) /* 2147483647 (2^31 - 1) */ #define AbsoluteTimeIsValid(time) \ ((bool) ((time) != INVALID_ABSTIME)) /* * Because NOSTART_ABSTIME is defined as INT_MIN, there can't be any * AbsoluteTime values less than it. Therefore, we can code the test * "time > NOSTART_ABSTIME" as "time != NOSTART_ABSTIME", which avoids * compiler bugs on some platforms. --- tgl & az, 11/2000 */ #define AbsoluteTimeIsReal(time) \ ((bool) (((AbsoluteTime) (time)) < NOEND_ABSTIME && \ ((AbsoluteTime) (time)) != NOSTART_ABSTIME)) #define RelativeTimeIsValid(time) \ ((bool) (((RelativeTime) (time)) != INVALID_RELTIME)) /* * nabstime.c prototypes */ extern Datum abstimein(PG_FUNCTION_ARGS); extern Datum abstimeout(PG_FUNCTION_ARGS); extern Datum abstimerecv(PG_FUNCTION_ARGS); extern Datum abstimesend(PG_FUNCTION_ARGS); extern Datum abstimeeq(PG_FUNCTION_ARGS); extern Datum abstimene(PG_FUNCTION_ARGS); extern Datum abstimelt(PG_FUNCTION_ARGS); extern Datum abstimegt(PG_FUNCTION_ARGS); extern Datum abstimele(PG_FUNCTION_ARGS); extern Datum abstimege(PG_FUNCTION_ARGS); extern Datum abstime_finite(PG_FUNCTION_ARGS); extern Datum timestamp_abstime(PG_FUNCTION_ARGS); extern Datum abstime_timestamp(PG_FUNCTION_ARGS); extern Datum timestamptz_abstime(PG_FUNCTION_ARGS); extern Datum abstime_timestamptz(PG_FUNCTION_ARGS); extern Datum reltimein(PG_FUNCTION_ARGS); extern Datum reltimeout(PG_FUNCTION_ARGS); extern Datum reltimerecv(PG_FUNCTION_ARGS); extern Datum reltimesend(PG_FUNCTION_ARGS); extern Datum tintervalin(PG_FUNCTION_ARGS); extern Datum tintervalout(PG_FUNCTION_ARGS); extern Datum tintervalrecv(PG_FUNCTION_ARGS); extern Datum tintervalsend(PG_FUNCTION_ARGS); extern Datum interval_reltime(PG_FUNCTION_ARGS); extern Datum reltime_interval(PG_FUNCTION_ARGS); extern Datum mktinterval(PG_FUNCTION_ARGS); extern Datum timepl(PG_FUNCTION_ARGS); extern Datum timemi(PG_FUNCTION_ARGS); extern Datum intinterval(PG_FUNCTION_ARGS); extern Datum tintervalrel(PG_FUNCTION_ARGS); extern Datum timenow(PG_FUNCTION_ARGS); extern Datum reltimeeq(PG_FUNCTION_ARGS); extern Datum reltimene(PG_FUNCTION_ARGS); extern Datum reltimelt(PG_FUNCTION_ARGS); extern Datum reltimegt(PG_FUNCTION_ARGS); extern Datum reltimele(PG_FUNCTION_ARGS); extern Datum reltimege(PG_FUNCTION_ARGS); extern Datum tintervalsame(PG_FUNCTION_ARGS); extern Datum tintervaleq(PG_FUNCTION_ARGS); extern Datum tintervalne(PG_FUNCTION_ARGS); extern Datum tintervallt(PG_FUNCTION_ARGS); extern Datum tintervalgt(PG_FUNCTION_ARGS); extern Datum tintervalle(PG_FUNCTION_ARGS); extern Datum tintervalge(PG_FUNCTION_ARGS); extern Datum tintervalleneq(PG_FUNCTION_ARGS); extern Datum tintervallenne(PG_FUNCTION_ARGS); extern Datum tintervallenlt(PG_FUNCTION_ARGS); extern Datum tintervallengt(PG_FUNCTION_ARGS); extern Datum tintervallenle(PG_FUNCTION_ARGS); extern Datum tintervallenge(PG_FUNCTION_ARGS); extern Datum tintervalct(PG_FUNCTION_ARGS); extern Datum tintervalov(PG_FUNCTION_ARGS); extern Datum tintervalstart(PG_FUNCTION_ARGS); extern Datum tintervalend(PG_FUNCTION_ARGS); extern Datum timeofday(PG_FUNCTION_ARGS); /* non-fmgr-callable support routines */ extern AbsoluteTime GetCurrentAbsoluteTime(void); extern void abstime2tm(AbsoluteTime time, int *tzp, struct pg_tm * tm, char **tzn); #endif /* NABSTIME_H */