1/*-------------------------------------------------------------------------
2 *
3 * date.h
4 * Definitions for the SQL "date" and "time" types.
5 *
6 *
7 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
9 *
10 * src/include/utils/date.h
11 *
12 *-------------------------------------------------------------------------
13 */
14#ifndef DATE_H
15#define DATE_H
16
17#include <math.h>
18
19#include "fmgr.h"
20#include "pgtime.h"
21#include "datatype/timestamp.h"
22
23typedef int32 DateADT;
24
25typedef int64 TimeADT;
26
27typedef struct
28{
29 TimeADT time; /* all time units other than months and years */
30 int32 zone; /* numeric time zone, in seconds */
31} TimeTzADT;
32
33/*
34 * Infinity and minus infinity must be the max and min values of DateADT.
35 */
36#define DATEVAL_NOBEGIN ((DateADT) PG_INT32_MIN)
37#define DATEVAL_NOEND ((DateADT) PG_INT32_MAX)
38
39#define DATE_NOBEGIN(j) ((j) = DATEVAL_NOBEGIN)
40#define DATE_IS_NOBEGIN(j) ((j) == DATEVAL_NOBEGIN)
41#define DATE_NOEND(j) ((j) = DATEVAL_NOEND)
42#define DATE_IS_NOEND(j) ((j) == DATEVAL_NOEND)
43#define DATE_NOT_FINITE(j) (DATE_IS_NOBEGIN(j) || DATE_IS_NOEND(j))
44
45/*
46 * Macros for fmgr-callable functions.
47 *
48 * For TimeADT, we make use of the same support routines as for int64.
49 * Therefore TimeADT is pass-by-reference if and only if int64 is!
50 */
51#define MAX_TIME_PRECISION 6
52
53#define DatumGetDateADT(X) ((DateADT) DatumGetInt32(X))
54#define DatumGetTimeADT(X) ((TimeADT) DatumGetInt64(X))
55#define DatumGetTimeTzADTP(X) ((TimeTzADT *) DatumGetPointer(X))
56
57#define DateADTGetDatum(X) Int32GetDatum(X)
58#define TimeADTGetDatum(X) Int64GetDatum(X)
59#define TimeTzADTPGetDatum(X) PointerGetDatum(X)
60
61#define PG_GETARG_DATEADT(n) DatumGetDateADT(PG_GETARG_DATUM(n))
62#define PG_GETARG_TIMEADT(n) DatumGetTimeADT(PG_GETARG_DATUM(n))
63#define PG_GETARG_TIMETZADT_P(n) DatumGetTimeTzADTP(PG_GETARG_DATUM(n))
64
65#define PG_RETURN_DATEADT(x) return DateADTGetDatum(x)
66#define PG_RETURN_TIMEADT(x) return TimeADTGetDatum(x)
67#define PG_RETURN_TIMETZADT_P(x) return TimeTzADTPGetDatum(x)
68
69
70/* date.c */
71extern int32 anytime_typmod_check(bool istz, int32 typmod);
72extern double date2timestamp_no_overflow(DateADT dateVal);
73extern void EncodeSpecialDate(DateADT dt, char *str);
74extern DateADT GetSQLCurrentDate(void);
75extern TimeTzADT *GetSQLCurrentTime(int32 typmod);
76extern TimeADT GetSQLLocalTime(int32 typmod);
77extern int time2tm(TimeADT time, struct pg_tm *tm, fsec_t *fsec);
78extern int timetz2tm(TimeTzADT *time, struct pg_tm *tm, fsec_t *fsec, int *tzp);
79
80#endif /* DATE_H */
81