text: /*-------------------------------------------------------------------------
   *
   * date.h
   *	  Definitions for the SQL92 "date" and "time" types.
   *
   *
   * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
   * Portions Copyright (c) 1994, Regents of the University of California
   *
   * $PostgreSQL: pgsql/src/include/utils/date.h,v 1.34 2006/07/13 16:49:20 momjian Exp $
   *
   *-------------------------------------------------------------------------
   */
  #ifndef DATE_H
  #define DATE_H
  
  #include <math.h>
  
  #include "fmgr.h"
  
  
  typedef int32 DateADT;
  
  #ifdef HAVE_INT64_TIMESTAMP
  typedef int64 TimeADT;
  #else
  typedef float8 TimeADT;
  #endif
  
  typedef 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		zone;			/* numeric time zone, in seconds */
  } TimeTzADT;
  
  /*
   * Macros for fmgr-callable functions.
   *
   * For TimeADT, we make use of the same support routines as for float8 or int64.
   * Therefore TimeADT is pass-by-reference if and only if float8 or int64 is!
   */
  #ifdef HAVE_INT64_TIMESTAMP
  
  #define MAX_TIME_PRECISION 6
  
  #define DatumGetDateADT(X)	  ((DateADT) DatumGetInt32(X))
  #define DatumGetTimeADT(X)	  ((TimeADT) DatumGetInt64(X))
  #define DatumGetTimeTzADTP(X) ((TimeTzADT *) DatumGetPointer(X))
  
  #define DateADTGetDatum(X)	  Int32GetDatum(X)
  #define TimeADTGetDatum(X)	  Int64GetDatum(X)
  #define TimeTzADTPGetDatum(X) PointerGetDatum(X)
  #else
  
  #define MAX_TIME_PRECISION 10
  
  /* round off to MAX_TIME_PRECISION decimal places */
  #define TIME_PREC_INV 10000000000.0
  #define TIMEROUND(j) (rint(((double) (j)) * TIME_PREC_INV) / TIME_PREC_INV)
  
  #define DatumGetDateADT(X)	  ((DateADT) DatumGetInt32(X))
  #define DatumGetTimeADT(X)	  ((TimeADT) DatumGetFloat8(X))
  #define DatumGetTimeTzADTP(X) ((TimeTzADT *) DatumGetPointer(X))
  
  #define DateADTGetDatum(X)	  Int32GetDatum(X)
  #define TimeADTGetDatum(X)	  Float8GetDatum(X)
  #define TimeTzADTPGetDatum(X) PointerGetDatum(X)
  #endif   /* HAVE_INT64_TIMESTAMP */
  
  #define PG_GETARG_DATEADT(n)	 DatumGetDateADT(PG_GETARG_DATUM(n))
  #define PG_GETARG_TIMEADT(n)	 DatumGetTimeADT(PG_GETARG_DATUM(n))
  #define PG_GETARG_TIMETZADT_P(n) DatumGetTimeTzADTP(PG_GETARG_DATUM(n))
  
  #define PG_RETURN_DATEADT(x)	 return DateADTGetDatum(x)
  #define PG_RETURN_TIMEADT(x)	 return TimeADTGetDatum(x)
  #define PG_RETURN_TIMETZADT_P(x) return TimeTzADTPGetDatum(x)
  
  
  /* date.c */
  extern Datum date_in(PG_FUNCTION_ARGS);
  extern Datum date_out(PG_FUNCTION_ARGS);
  extern Datum date_recv(PG_FUNCTION_ARGS);
  extern Datum date_send(PG_FUNCTION_ARGS);
  extern Datum date_eq(PG_FUNCTION_ARGS);
  extern Datum date_ne(PG_FUNCTION_ARGS);
  extern Datum date_lt(PG_FUNCTION_ARGS);
  extern Datum date_le(PG_FUNCTION_ARGS);
  extern Datum date_gt(PG_FUNCTION_ARGS);
  extern Datum date_ge(PG_FUNCTION_ARGS);
  extern Datum date_cmp(PG_FUNCTION_ARGS);
  extern Datum date_larger(PG_FUNCTION_ARGS);
  extern Datum date_smaller(PG_FUNCTION_ARGS);
  extern Datum date_mi(PG_FUNCTION_ARGS);
  extern Datum date_pli(PG_FUNCTION_ARGS);
  extern Datum date_mii(PG_FUNCTION_ARGS);
  extern Datum date_eq_timestamp(PG_FUNCTION_ARGS);
  extern Datum date_ne_timestamp(PG_FUNCTION_ARGS);
  extern Datum date_lt_timestamp(PG_FUNCTION_ARGS);
  extern Datum date_le_timestamp(PG_FUNCTION_ARGS);
  extern Datum date_gt_timestamp(PG_FUNCTION_ARGS);
  extern Datum date_ge_timestamp(PG_FUNCTION_ARGS);
  extern Datum date_cmp_timestamp(PG_FUNCTION_ARGS);
  extern Datum date_eq_timestamptz(PG_FUNCTION_ARGS);
  extern Datum date_ne_timestamptz(PG_FUNCTION_ARGS);
  extern Datum date_lt_timestamptz(PG_FUNCTION_ARGS);
  extern Datum date_le_timestamptz(PG_FUNCTION_ARGS);
  extern Datum date_gt_timestamptz(PG_FUNCTION_ARGS);
  extern Datum date_ge_timestamptz(PG_FUNCTION_ARGS);
  extern Datum date_cmp_timestamptz(PG_FUNCTION_ARGS);
  extern Datum timestamp_eq_date(PG_FUNCTION_ARGS);
  extern Datum timestamp_ne_date(PG_FUNCTION_ARGS);
  extern Datum timestamp_lt_date(PG_FUNCTION_ARGS);
  extern Datum timestamp_le_date(PG_FUNCTION_ARGS);
  extern Datum timestamp_gt_date(PG_FUNCTION_ARGS);
  extern Datum timestamp_ge_date(PG_FUNCTION_ARGS);
  extern Datum timestamp_cmp_date(PG_FUNCTION_ARGS);
  extern Datum timestamptz_eq_date(PG_FUNCTION_ARGS);
  extern Datum timestamptz_ne_date(PG_FUNCTION_ARGS);
  extern Datum timestamptz_lt_date(PG_FUNCTION_ARGS);
  extern Datum timestamptz_le_date(PG_FUNCTION_ARGS);
  extern Datum timestamptz_gt_date(PG_FUNCTION_ARGS);
  extern Datum timestamptz_ge_date(PG_FUNCTION_ARGS);
  extern Datum timestamptz_cmp_date(PG_FUNCTION_ARGS);
  extern Datum date_pl_interval(PG_FUNCTION_ARGS);
  extern Datum date_mi_interval(PG_FUNCTION_ARGS);
  extern Datum date_timestamp(PG_FUNCTION_ARGS);
  extern Datum timestamp_date(PG_FUNCTION_ARGS);
  extern Datum date_timestamptz(PG_FUNCTION_ARGS);
  extern Datum timestamptz_date(PG_FUNCTION_ARGS);
  extern Datum datetime_timestamp(PG_FUNCTION_ARGS);
  extern Datum abstime_date(PG_FUNCTION_ARGS);
  extern Datum text_date(PG_FUNCTION_ARGS);
  extern Datum date_text(PG_FUNCTION_ARGS);
  
  extern Datum time_in(PG_FUNCTION_ARGS);
  extern Datum time_out(PG_FUNCTION_ARGS);
  extern Datum time_recv(PG_FUNCTION_ARGS);
  extern Datum time_send(PG_FUNCTION_ARGS);
  extern Datum time_scale(PG_FUNCTION_ARGS);
  extern Datum time_eq(PG_FUNCTION_ARGS);
  extern Datum time_ne(PG_FUNCTION_ARGS);
  extern Datum time_lt(PG_FUNCTION_ARGS);
  extern Datum time_le(PG_FUNCTION_ARGS);
  extern Datum time_gt(PG_FUNCTION_ARGS);
  extern Datum time_ge(PG_FUNCTION_ARGS);
  extern Datum time_cmp(PG_FUNCTION_ARGS);
  extern Datum overlaps_time(PG_FUNCTION_ARGS);
  extern Datum time_larger(PG_FUNCTION_ARGS);
  extern Datum time_smaller(PG_FUNCTION_ARGS);
  extern Datum time_mi_time(PG_FUNCTION_ARGS);
  extern Datum timestamp_time(PG_FUNCTION_ARGS);
  extern Datum timestamptz_time(PG_FUNCTION_ARGS);
  extern Datum time_interval(PG_FUNCTION_ARGS);
  extern Datum interval_time(PG_FUNCTION_ARGS);
  extern Datum text_time(PG_FUNCTION_ARGS);
  extern Datum time_text(PG_FUNCTION_ARGS);
  extern Datum time_pl_interval(PG_FUNCTION_ARGS);
  extern Datum time_mi_interval(PG_FUNCTION_ARGS);
  extern Datum time_part(PG_FUNCTION_ARGS);
  
  extern Datum timetz_in(PG_FUNCTION_ARGS);
  extern Datum timetz_out(PG_FUNCTION_ARGS);
  extern Datum timetz_recv(PG_FUNCTION_ARGS);
  extern Datum timetz_send(PG_FUNCTION_ARGS);
  extern Datum timetz_scale(PG_FUNCTION_ARGS);
  extern Datum timetz_eq(PG_FUNCTION_ARGS);
  extern Datum timetz_ne(PG_FUNCTION_ARGS);
  extern Datum timetz_lt(PG_FUNCTION_ARGS);
  extern Datum timetz_le(PG_FUNCTION_ARGS);
  extern Datum timetz_gt(PG_FUNCTION_ARGS);
  extern Datum timetz_ge(PG_FUNCTION_ARGS);
  extern Datum timetz_cmp(PG_FUNCTION_ARGS);
  extern Datum timetz_hash(PG_FUNCTION_ARGS);
  extern Datum overlaps_timetz(PG_FUNCTION_ARGS);
  extern Datum timetz_larger(PG_FUNCTION_ARGS);
  extern Datum timetz_smaller(PG_FUNCTION_ARGS);
  extern Datum timetz_time(PG_FUNCTION_ARGS);
  extern Datum time_timetz(PG_FUNCTION_ARGS);
  extern Datum timestamptz_timetz(PG_FUNCTION_ARGS);
  extern Datum datetimetz_timestamptz(PG_FUNCTION_ARGS);
  extern Datum text_timetz(PG_FUNCTION_ARGS);
  extern Datum timetz_text(PG_FUNCTION_ARGS);
  extern Datum timetz_part(PG_FUNCTION_ARGS);
  extern Datum timetz_zone(PG_FUNCTION_ARGS);
  extern Datum timetz_izone(PG_FUNCTION_ARGS);
  extern Datum timetz_pl_interval(PG_FUNCTION_ARGS);
  extern Datum timetz_mi_interval(PG_FUNCTION_ARGS);
  
  #endif   /* DATE_H */
  