/*------------------------------------------------------------------------- * * timestamp.h *	  Definitions for the SQL92 "timestamp" and "interval" types. * * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * $Id: timestamp.h,v 1.31 2003/08/04 02:40:15 momjian Exp $ * *------------------------------------------------------------------------- */#ifndef TIMESTAMP_H#define TIMESTAMP_H#include <time.h>#include <math.h>#include <limits.h>#include <float.h>#include "fmgr.h"#ifdef HAVE_INT64_TIMESTAMP#include "utils/int8.h"#endif/* * Timestamp represents absolute time. * Interval 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 */#ifdef HAVE_INT64_TIMESTAMPtypedef int64 Timestamp;typedef int64 TimestampTz;#elsetypedef double Timestamp;typedef double TimestampTz;#endiftypedef struct{#ifdef HAVE_INT64_TIMESTAMP	int64		time;			/* all time units other than months and								 * years */#else	double		time;			/* all time units other than months and								 * years */#endif	int32		month;			/* months and years, after time for								 * alignment */} Interval;#define MAX_TIMESTAMP_PRECISION 6#define MAX_INTERVAL_PRECISION 6/* * Macros for fmgr-callable functions. * * For Timestamp, we make use of the same support routines as for int64 * or float8.  Therefore Timestamp is pass-by-reference if and only if * int64 or float8 is! */#ifdef HAVE_INT64_TIMESTAMP#define DatumGetTimestamp(X)  ((Timestamp) DatumGetInt64(X))#define DatumGetTimestampTz(X)	((TimestampTz) DatumGetInt64(X))#define DatumGetIntervalP(X)  ((Interval *) DatumGetPointer(X))#define TimestampGetDatum(X) Int64GetDatum(X)#define TimestampTzGetDatum(X) Int64GetDatum(X)#define IntervalPGetDatum(X) PointerGetDatum(X)#define PG_GETARG_TIMESTAMP(n) PG_GETARG_INT64(n)#define PG_GETARG_TIMESTAMPTZ(n) PG_GETARG_INT64(n)#define PG_GETARG_INTERVAL_P(n) DatumGetIntervalP(PG_GETARG_DATUM(n))#define PG_RETURN_TIMESTAMP(x) PG_RETURN_INT64(x)#define PG_RETURN_TIMESTAMPTZ(x) PG_RETURN_INT64(x)#define PG_RETURN_INTERVAL_P(x) return IntervalPGetDatum(x)#define DT_NOBEGIN		(-INT64CONST(0x7fffffffffffffff) - 1)#define DT_NOEND		(INT64CONST(0x7fffffffffffffff))#else#define DatumGetTimestamp(X)  ((Timestamp) DatumGetFloat8(X))#define DatumGetTimestampTz(X)	((TimestampTz) DatumGetFloat8(X))#define DatumGetIntervalP(X)  ((Interval *) DatumGetPointer(X))#define TimestampGetDatum(X) Float8GetDatum(X)#define TimestampTzGetDatum(X) Float8GetDatum(X)#define IntervalPGetDatum(X) PointerGetDatum(X)#define PG_GETARG_TIMESTAMP(n) DatumGetTimestamp(PG_GETARG_DATUM(n))#define PG_GETARG_TIMESTAMPTZ(n) DatumGetTimestampTz(PG_GETARG_DATUM(n))#define PG_GETARG_INTERVAL_P(n) DatumGetIntervalP(PG_GETARG_DATUM(n))#define PG_RETURN_TIMESTAMP(x) return TimestampGetDatum(x)#define PG_RETURN_TIMESTAMPTZ(x) return TimestampTzGetDatum(x)#define PG_RETURN_INTERVAL_P(x) return IntervalPGetDatum(x)#ifdef HUGE_VAL#define DT_NOBEGIN		(-HUGE_VAL)#define DT_NOEND		(HUGE_VAL)#else#define DT_NOBEGIN		(-DBL_MAX)#define DT_NOEND		(DBL_MAX)#endif#endif   /* HAVE_INT64_TIMESTAMP */#define TIMESTAMP_NOBEGIN(j)	do {j = DT_NOBEGIN;} while (0)#define TIMESTAMP_IS_NOBEGIN(j) ((j) == DT_NOBEGIN)#define TIMESTAMP_NOEND(j)		do {j = DT_NOEND;} while (0)#define TIMESTAMP_IS_NOEND(j)	((j) == DT_NOEND)#define TIMESTAMP_NOT_FINITE(j) (TIMESTAMP_IS_NOBEGIN(j) || TIMESTAMP_IS_NOEND(j))#ifdef HAVE_INT64_TIMESTAMPtypedef int32 fsec_t;#elsetypedef double fsec_t;#define TIME_PREC_INV 1000000.0#define JROUND(j) (rint(((double) (j))*TIME_PREC_INV)/TIME_PREC_INV)#endif#define TIMESTAMP_MASK(b) (1 << (b))#define INTERVAL_MASK(b) (1 << (b))/* Macros to handle packing and unpacking the typmod field for intervals */#define INTERVAL_FULL_RANGE (0x7FFF)#define INTERVAL_RANGE_MASK (0x7FFF)#define INTERVAL_FULL_PRECISION (0xFFFF)#define INTERVAL_PRECISION_MASK (0xFFFF)#define INTERVAL_TYPMOD(p,r) ((((r) & INTERVAL_RANGE_MASK) << 16) | ((p) & INTERVAL_PRECISION_MASK))#define INTERVAL_PRECISION(t) ((t) & INTERVAL_PRECISION_MASK)#define INTERVAL_RANGE(t) (((t) >> 16) & INTERVAL_RANGE_MASK)/* * timestamp.c prototypes */extern Datum timestamp_in(PG_FUNCTION_ARGS);extern Datum timestamp_out(PG_FUNCTION_ARGS);extern Datum timestamp_recv(PG_FUNCTION_ARGS);extern Datum timestamp_send(PG_FUNCTION_ARGS);extern Datum timestamp_scale(PG_FUNCTION_ARGS);extern Datum timestamp_eq(PG_FUNCTION_ARGS);extern Datum timestamp_ne(PG_FUNCTION_ARGS);extern Datum timestamp_lt(PG_FUNCTION_ARGS);extern Datum timestamp_le(PG_FUNCTION_ARGS);extern Datum timestamp_ge(PG_FUNCTION_ARGS);extern Datum timestamp_gt(PG_FUNCTION_ARGS);extern Datum timestamp_finite(PG_FUNCTION_ARGS);extern Datum timestamp_cmp(PG_FUNCTION_ARGS);extern Datum timestamp_smaller(PG_FUNCTION_ARGS);extern Datum timestamp_larger(PG_FUNCTION_ARGS);extern Datum interval_in(PG_FUNCTION_ARGS);extern Datum interval_out(PG_FUNCTION_ARGS);extern Datum interval_recv(PG_FUNCTION_ARGS);extern Datum interval_send(PG_FUNCTION_ARGS);extern Datum interval_scale(PG_FUNCTION_ARGS);extern Datum interval_eq(PG_FUNCTION_ARGS);extern Datum interval_ne(PG_FUNCTION_ARGS);extern Datum interval_lt(PG_FUNCTION_ARGS);extern Datum interval_le(PG_FUNCTION_ARGS);extern Datum interval_ge(PG_FUNCTION_ARGS);extern Datum interval_gt(PG_FUNCTION_ARGS);extern Datum interval_finite(PG_FUNCTION_ARGS);extern Datum interval_cmp(PG_FUNCTION_ARGS);extern Datum interval_hash(PG_FUNCTION_ARGS);extern Datum interval_smaller(PG_FUNCTION_ARGS);extern Datum interval_larger(PG_FUNCTION_ARGS);extern Datum timestamp_text(PG_FUNCTION_ARGS);extern Datum text_timestamp(PG_FUNCTION_ARGS);extern Datum interval_text(PG_FUNCTION_ARGS);extern Datum text_interval(PG_FUNCTION_ARGS);extern Datum timestamp_trunc(PG_FUNCTION_ARGS);extern Datum interval_trunc(PG_FUNCTION_ARGS);extern Datum timestamp_part(PG_FUNCTION_ARGS);extern Datum interval_part(PG_FUNCTION_ARGS);extern Datum timestamp_zone(PG_FUNCTION_ARGS);extern Datum timestamp_izone(PG_FUNCTION_ARGS);extern Datum timestamp_timestamptz(PG_FUNCTION_ARGS);extern Datum timestamptz_in(PG_FUNCTION_ARGS);extern Datum timestamptz_out(PG_FUNCTION_ARGS);extern Datum timestamptz_recv(PG_FUNCTION_ARGS);extern Datum timestamptz_send(PG_FUNCTION_ARGS);extern Datum timestamptz_scale(PG_FUNCTION_ARGS);extern Datum timestamptz_timestamp(PG_FUNCTION_ARGS);extern Datum timestamptz_zone(PG_FUNCTION_ARGS);extern Datum timestamptz_izone(PG_FUNCTION_ARGS);extern Datum timestamptz_timestamptz(PG_FUNCTION_ARGS);extern Datum interval_um(PG_FUNCTION_ARGS);extern Datum interval_pl(PG_FUNCTION_ARGS);extern Datum interval_mi(PG_FUNCTION_ARGS);extern Datum interval_mul(PG_FUNCTION_ARGS);extern Datum mul_d_interval(PG_FUNCTION_ARGS);extern Datum interval_div(PG_FUNCTION_ARGS);extern Datum interval_accum(PG_FUNCTION_ARGS);extern Datum interval_avg(PG_FUNCTION_ARGS);extern Datum timestamp_mi(PG_FUNCTION_ARGS);extern Datum timestamp_pl_span(PG_FUNCTION_ARGS);extern Datum timestamp_mi_span(PG_FUNCTION_ARGS);extern Datum timestamp_age(PG_FUNCTION_ARGS);extern Datum overlaps_timestamp(PG_FUNCTION_ARGS);extern Datum timestamptz_text(PG_FUNCTION_ARGS);extern Datum text_timestamptz(PG_FUNCTION_ARGS);extern Datum timestamptz_pl_span(PG_FUNCTION_ARGS);extern Datum timestamptz_mi_span(PG_FUNCTION_ARGS);extern Datum timestamptz_age(PG_FUNCTION_ARGS);extern Datum timestamptz_trunc(PG_FUNCTION_ARGS);extern Datum timestamptz_part(PG_FUNCTION_ARGS);extern Datum now(PG_FUNCTION_ARGS);/* Internal routines (not fmgr-callable) */extern int	tm2timestamp(struct tm * tm, fsec_t fsec, int *tzp, Timestamp *dt);extern int timestamp2tm(Timestamp dt, int *tzp, struct tm * tm,			 fsec_t *fsec, char **tzn);extern void dt2time(Timestamp dt, int *hour, int *min, int *sec, fsec_t *fsec);extern int	interval2tm(Interval span, struct tm * tm, fsec_t *fsec);extern int	tm2interval(struct tm * tm, fsec_t fsec, Interval *span);extern Timestamp SetEpochTimestamp(void);extern void GetEpochTime(struct tm * tm);extern void isoweek2date(int woy, int *year, int *mon, int *mday);extern int	date2isoweek(int year, int mon, int mday);#endif   /* TIMESTAMP_H */