tnumber_mathfuncs.h

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#ifndef __TEMPORAL_MATHFUNCS_H__
#define __TEMPORAL_MATHFUNCS_H__

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

typedef enum
{
  ADD,
  SUB,
  MULT,
  DIV,
  DIST,
} TArithmetic;

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

extern Datum datum_round(Datum value, Datum prec);

extern Datum add_base_temporal(PG_FUNCTION_ARGS);
extern Datum add_temporal_base(PG_FUNCTION_ARGS);
extern Datum add_temporal_temporal(PG_FUNCTION_ARGS);

extern Datum sub_base_temporal(PG_FUNCTION_ARGS);
extern Datum sub_temporal_base(PG_FUNCTION_ARGS);
extern Datum sub_temporal_temporal(PG_FUNCTION_ARGS);

extern Datum mult_base_temporal(PG_FUNCTION_ARGS);
extern Datum mult_temporal_base(PG_FUNCTION_ARGS);
extern Datum mult_temporal_temporal(PG_FUNCTION_ARGS);

extern Datum div_base_temporal(PG_FUNCTION_ARGS);
extern Datum div_temporal_base(PG_FUNCTION_ARGS);
extern Datum div_temporal_temporal(PG_FUNCTION_ARGS);

extern int int_cmp(const void *a, const void *b);

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

#endif