170 lines
6.0 KiB
C
170 lines
6.0 KiB
C
/*-------------------------------------------------------------------------
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*
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* nabstime.h
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* Definitions for the "new" abstime code.
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*
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/nabstime.h,v 1.42 2004/05/21 05:08:05 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef NABSTIME_H
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#define NABSTIME_H
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#include <limits.h>
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#include "fmgr.h"
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#include "pgtime.h"
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#include "utils/timestamp.h"
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#include "utils/datetime.h"
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/* ----------------------------------------------------------------
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*
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* time types + support macros
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*
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* ----------------------------------------------------------------
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*/
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/*
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* Although time_t generally is a long int on 64 bit systems, these two
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* types must be 4 bytes, because that's what the system assumes. They
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* should be yanked (long) before 2038 and be replaced by timestamp and
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* interval.
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*/
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typedef int32 AbsoluteTime;
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typedef int32 RelativeTime;
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typedef struct
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{
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int32 status;
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AbsoluteTime data[2];
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} TimeIntervalData;
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typedef TimeIntervalData *TimeInterval;
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/*
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* Macros for fmgr-callable functions.
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*/
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#define DatumGetAbsoluteTime(X) ((AbsoluteTime) DatumGetInt32(X))
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#define DatumGetRelativeTime(X) ((RelativeTime) DatumGetInt32(X))
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#define DatumGetTimeInterval(X) ((TimeInterval) DatumGetPointer(X))
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#define AbsoluteTimeGetDatum(X) Int32GetDatum(X)
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#define RelativeTimeGetDatum(X) Int32GetDatum(X)
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#define TimeIntervalGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_ABSOLUTETIME(n) DatumGetAbsoluteTime(PG_GETARG_DATUM(n))
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#define PG_GETARG_RELATIVETIME(n) DatumGetRelativeTime(PG_GETARG_DATUM(n))
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#define PG_GETARG_TIMEINTERVAL(n) DatumGetTimeInterval(PG_GETARG_DATUM(n))
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#define PG_RETURN_ABSOLUTETIME(x) return AbsoluteTimeGetDatum(x)
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#define PG_RETURN_RELATIVETIME(x) return RelativeTimeGetDatum(x)
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#define PG_RETURN_TIMEINTERVAL(x) return TimeIntervalGetDatum(x)
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/*
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* Reserved values
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* Epoch is Unix system time zero, but needs to be kept as a reserved
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* value rather than converting to time since timezone calculations
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* might move it away from 1970-01-01 00:00:00Z - tgl 97/02/20
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*
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* Pre-v6.1 code had large decimal numbers for reserved values.
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* These were chosen as special 32-bit bit patterns,
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* so redefine them explicitly using these bit patterns. - tgl 97/02/24
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*/
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#define INVALID_ABSTIME ((AbsoluteTime) 0x7FFFFFFE) /* 2147483647 (2^31 - 1) */
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#define NOEND_ABSTIME ((AbsoluteTime) 0x7FFFFFFC) /* 2147483645 (2^31 - 3) */
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#define NOSTART_ABSTIME ((AbsoluteTime) INT_MIN) /* -2147483648 */
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#define INVALID_RELTIME ((RelativeTime) 0x7FFFFFFE) /* 2147483647 (2^31 - 1) */
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#define AbsoluteTimeIsValid(time) \
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((bool) ((time) != INVALID_ABSTIME))
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/*
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* Because NOSTART_ABSTIME is defined as INT_MIN, there can't be any
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* AbsoluteTime values less than it. Therefore, we can code the test
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* "time > NOSTART_ABSTIME" as "time != NOSTART_ABSTIME", which avoids
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* compiler bugs on some platforms. --- tgl & az, 11/2000
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*/
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#define AbsoluteTimeIsReal(time) \
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((bool) (((AbsoluteTime) (time)) < NOEND_ABSTIME && \
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((AbsoluteTime) (time)) != NOSTART_ABSTIME))
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#define RelativeTimeIsValid(time) \
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((bool) (((RelativeTime) (time)) != INVALID_RELTIME))
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/*
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* nabstime.c prototypes
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*/
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extern Datum abstimein(PG_FUNCTION_ARGS);
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extern Datum abstimeout(PG_FUNCTION_ARGS);
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extern Datum abstimerecv(PG_FUNCTION_ARGS);
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extern Datum abstimesend(PG_FUNCTION_ARGS);
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extern Datum abstimeeq(PG_FUNCTION_ARGS);
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extern Datum abstimene(PG_FUNCTION_ARGS);
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extern Datum abstimelt(PG_FUNCTION_ARGS);
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extern Datum abstimegt(PG_FUNCTION_ARGS);
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extern Datum abstimele(PG_FUNCTION_ARGS);
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extern Datum abstimege(PG_FUNCTION_ARGS);
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extern Datum abstime_finite(PG_FUNCTION_ARGS);
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extern Datum timestamp_abstime(PG_FUNCTION_ARGS);
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extern Datum abstime_timestamp(PG_FUNCTION_ARGS);
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extern Datum timestamptz_abstime(PG_FUNCTION_ARGS);
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extern Datum abstime_timestamptz(PG_FUNCTION_ARGS);
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extern Datum reltimein(PG_FUNCTION_ARGS);
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extern Datum reltimeout(PG_FUNCTION_ARGS);
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extern Datum reltimerecv(PG_FUNCTION_ARGS);
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extern Datum reltimesend(PG_FUNCTION_ARGS);
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extern Datum tintervalin(PG_FUNCTION_ARGS);
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extern Datum tintervalout(PG_FUNCTION_ARGS);
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extern Datum tintervalrecv(PG_FUNCTION_ARGS);
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extern Datum tintervalsend(PG_FUNCTION_ARGS);
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extern Datum interval_reltime(PG_FUNCTION_ARGS);
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extern Datum reltime_interval(PG_FUNCTION_ARGS);
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extern Datum mktinterval(PG_FUNCTION_ARGS);
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extern Datum timepl(PG_FUNCTION_ARGS);
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extern Datum timemi(PG_FUNCTION_ARGS);
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extern Datum intinterval(PG_FUNCTION_ARGS);
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extern Datum tintervalrel(PG_FUNCTION_ARGS);
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extern Datum timenow(PG_FUNCTION_ARGS);
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extern Datum reltimeeq(PG_FUNCTION_ARGS);
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extern Datum reltimene(PG_FUNCTION_ARGS);
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extern Datum reltimelt(PG_FUNCTION_ARGS);
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extern Datum reltimegt(PG_FUNCTION_ARGS);
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extern Datum reltimele(PG_FUNCTION_ARGS);
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extern Datum reltimege(PG_FUNCTION_ARGS);
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extern Datum tintervalsame(PG_FUNCTION_ARGS);
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extern Datum tintervaleq(PG_FUNCTION_ARGS);
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extern Datum tintervalne(PG_FUNCTION_ARGS);
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extern Datum tintervallt(PG_FUNCTION_ARGS);
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extern Datum tintervalgt(PG_FUNCTION_ARGS);
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extern Datum tintervalle(PG_FUNCTION_ARGS);
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extern Datum tintervalge(PG_FUNCTION_ARGS);
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extern Datum tintervalleneq(PG_FUNCTION_ARGS);
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extern Datum tintervallenne(PG_FUNCTION_ARGS);
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extern Datum tintervallenlt(PG_FUNCTION_ARGS);
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extern Datum tintervallengt(PG_FUNCTION_ARGS);
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extern Datum tintervallenle(PG_FUNCTION_ARGS);
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extern Datum tintervallenge(PG_FUNCTION_ARGS);
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extern Datum tintervalct(PG_FUNCTION_ARGS);
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extern Datum tintervalov(PG_FUNCTION_ARGS);
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extern Datum tintervalstart(PG_FUNCTION_ARGS);
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extern Datum tintervalend(PG_FUNCTION_ARGS);
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extern Datum timeofday(PG_FUNCTION_ARGS);
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/* non-fmgr-callable support routines */
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extern AbsoluteTime GetCurrentAbsoluteTime(void);
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extern AbsoluteTime GetCurrentAbsoluteTimeUsec(int *usec);
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extern TimestampTz AbsoluteTimeUsecToTimestampTz(AbsoluteTime sec, int usec);
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extern void abstime2tm(AbsoluteTime time, int *tzp, struct pg_tm * tm, char **tzn);
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#endif /* NABSTIME_H */
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