1 /*------------------------------------------------------------------------- 2 * 3 * date.h 4 * Definitions for the SQL "date" and "time" types. 5 * 6 * 7 * Portions Copyright (c) 1996-2017, 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 "datatype/timestamp.h" 21 22 typedef int32 DateADT; 23 24 typedef int64 TimeADT; 25 26 typedef struct 27 { 28 TimeADT time; /* all time units other than months and years */ 29 int32 zone; /* numeric time zone, in seconds */ 30 } TimeTzADT; 31 32 /* 33 * Infinity and minus infinity must be the max and min values of DateADT. 34 */ 35 #define DATEVAL_NOBEGIN ((DateADT) PG_INT32_MIN) 36 #define DATEVAL_NOEND ((DateADT) PG_INT32_MAX) 37 38 #define DATE_NOBEGIN(j) ((j) = DATEVAL_NOBEGIN) 39 #define DATE_IS_NOBEGIN(j) ((j) == DATEVAL_NOBEGIN) 40 #define DATE_NOEND(j) ((j) = DATEVAL_NOEND) 41 #define DATE_IS_NOEND(j) ((j) == DATEVAL_NOEND) 42 #define DATE_NOT_FINITE(j) (DATE_IS_NOBEGIN(j) || DATE_IS_NOEND(j)) 43 44 /* 45 * Macros for fmgr-callable functions. 46 * 47 * For TimeADT, we make use of the same support routines as for int64. 48 * Therefore TimeADT is pass-by-reference if and only if int64 is! 49 */ 50 #define MAX_TIME_PRECISION 6 51 52 #define DatumGetDateADT(X) ((DateADT) DatumGetInt32(X)) 53 #define DatumGetTimeADT(X) ((TimeADT) DatumGetInt64(X)) 54 #define DatumGetTimeTzADTP(X) ((TimeTzADT *) DatumGetPointer(X)) 55 56 #define DateADTGetDatum(X) Int32GetDatum(X) 57 #define TimeADTGetDatum(X) Int64GetDatum(X) 58 #define TimeTzADTPGetDatum(X) PointerGetDatum(X) 59 60 #define PG_GETARG_DATEADT(n) DatumGetDateADT(PG_GETARG_DATUM(n)) 61 #define PG_GETARG_TIMEADT(n) DatumGetTimeADT(PG_GETARG_DATUM(n)) 62 #define PG_GETARG_TIMETZADT_P(n) DatumGetTimeTzADTP(PG_GETARG_DATUM(n)) 63 64 #define PG_RETURN_DATEADT(x) return DateADTGetDatum(x) 65 #define PG_RETURN_TIMEADT(x) return TimeADTGetDatum(x) 66 #define PG_RETURN_TIMETZADT_P(x) return TimeTzADTPGetDatum(x) 67 68 69 /* date.c */ 70 extern int32 anytime_typmod_check(bool istz, int32 typmod); 71 extern double date2timestamp_no_overflow(DateADT dateVal); 72 extern void EncodeSpecialDate(DateADT dt, char *str); 73 extern DateADT GetSQLCurrentDate(void); 74 extern TimeTzADT *GetSQLCurrentTime(int32 typmod); 75 extern TimeADT GetSQLLocalTime(int32 typmod); 76 extern bool time_overflows(int hour, int min, int sec, fsec_t fsec); 77 extern bool float_time_overflows(int hour, int min, double sec); 78 79 #endif /* DATE_H */ 80