tnumber_distance.h

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#ifndef __TNUMBER_DISTANCE_H__
#define __TNUMBER_DISTANCE_H__

#include <postgres.h>
#include <catalog/pg_type.h>
#include <float.h>

#include "temporal.h"

/*****************************************************************************/

/* Distance functions */

extern Datum distance_base_tnumber(PG_FUNCTION_ARGS);
extern Datum distance_tnumber_base(PG_FUNCTION_ARGS);
extern Datum distance_tnumber_tnumber(PG_FUNCTION_ARGS);

/* Nearest approach distance */

extern Datum NAD_base_tnumber(PG_FUNCTION_ARGS);
extern Datum NAD_tnumber_base(PG_FUNCTION_ARGS);
extern Datum NAD_tbox_tbox(PG_FUNCTION_ARGS);
extern Datum NAD_tbox_tnumber(PG_FUNCTION_ARGS);
extern Datum NAD_tnumber_tbox(PG_FUNCTION_ARGS);
extern Datum NAD_tnumber_tnumber(PG_FUNCTION_ARGS);

extern double NAD_tbox_tbox_internal(const TBOX *box1, const TBOX *box2);

// NAI and shortestline functions are not yet implemented
// Are they useful ?

/*****************************************************************************/

#endif