temporal_tile.h

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/*****************************************************************************
 *
 * This MobilityDB code is provided under The PostgreSQL License.
 * Copyright (c) 2016-2025, Université libre de Bruxelles and MobilityDB
 * contributors
 *
 * MobilityDB includes portions of PostGIS version 3 source code released
 * under the GNU General Public License (GPLv2 or later).
 * Copyright (c) 2001-2025, PostGIS contributors
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without a written
 * agreement is hereby granted, provided that the above copyright notice and
 * this paragraph and the following two paragraphs appear in all copies.
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 * IN NO EVENT SHALL UNIVERSITE LIBRE DE BRUXELLES BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
 * LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION,
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 *****************************************************************************/
 
#ifndef __TEMPORAL_TILE_H__
#define __TEMPORAL_TILE_H__
 
/* MEOS */
#include <meos.h>
#include "temporal/meos_catalog.h"
 
#define MAXDIMS 4
 
/*****************************************************************************/
 
typedef struct SpanBinState
{
  bool done;            
  uint8 basetype;       
  int i;                
  Datum size;           
  Datum origin;         
  Span span;            
  const void *to_split; 
  Datum value;          
  int nbins;            
} SpanBinState;
 
typedef struct TboxGridState
{
  bool done;            
  int i;                
  Datum vsize;          
  int64 tunits;         
  TBox box;             
  const Temporal *temp; 
  Datum value;          
  TimestampTz t;        
  int ntiles;           
  int max_coords[2];    
  int coords[2];        
} TboxGridState;
 
/*****************************************************************************/
 
extern int span_num_bins(const Span *s, Datum size, Datum origin, 
  Datum *start_bin, Datum *end_bin);
 
extern Span *span_bins(const Span *s, Datum size, Datum origin, int *count);
extern Span *spanset_bins(const SpanSet *ss, Datum size, Datum origin, int *count);
 
extern SpanBinState *temporal_time_bin_init(const Temporal *temp,
  const Interval *duration, TimestampTz torigin, int *nbins);
 
extern TboxGridState *tbox_tile_state_make(const Temporal *temp,
  const TBox *box, Datum vsize, const Interval *duration, Datum xorigin,
  TimestampTz torigin);
extern void tbox_tile_state_next(TboxGridState *state);
extern void tbox_tile_state_set(Datum value, TimestampTz t, Datum vsize,
  int64 tunits, meosType basetype, meosType spantype, TBox *box);
 
/*****************************************************************************/
 
extern int64 interval_units(const Interval *interval);
extern TimestampTz timestamptz_bin_start(TimestampTz timestamp, int64 tunits,
  TimestampTz torigin);
extern Datum datum_bin(Datum value, Datum size, Datum offset,
  meosType basetype);
 
extern TboxGridState *tnumber_value_time_tile_init(const Temporal *temp,
  Datum vsize, const Interval *duration, Datum vorigin, TimestampTz torigin,
  int *ntiles);
extern bool tbox_tile_state_get(TboxGridState *state, TBox *box);
 
/*****************************************************************************/
#endif /* __TEMPORAL_TILE_H__ */