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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 */