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/*
* Copyright 2023 Zacharias Knudsen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef H3_TYPE_H
#define H3_TYPE_H
#include <h3api.h>
/*
* DatumGetH3Index
* Returns H3 index value of a datum.
*
* Note: this macro hides whether h3 index is pass by value or by reference.
*/
#ifdef USE_FLOAT8_BYVAL
#define DatumGetH3Index(X) ((H3Index) (X))
#else
#define DatumGetH3Index(X) (* ((H3Index *) DatumGetPointer(X)))
#endif
/*
* H3IndexGetDatum
* Returns datum representation for an H3 index.
*
* Note: if H3 index is pass by reference, this function returns a reference
* to palloc'd space.
*/
#ifdef USE_FLOAT8_BYVAL
#define H3IndexGetDatum(X) ((Datum) (X))
#else
#define H3IndexGetDatum(X) Int64GetDatum((int64) (X))
#endif
/* Macros for fetching arguments and returning results of h3 index type */
#define PG_GETARG_H3INDEX(n) DatumGetH3Index(PG_GETARG_DATUM(n))
#define PG_RETURN_H3INDEX(x) return H3IndexGetDatum(x)
/* use origin resolution minus one when no resolution is given */
#define PG_GETARG_OPTIONAL_RES(n, cell, offset) \
PG_NARGS() == (n + 1) ? PG_GETARG_INT32(1) : getResolution(cell) + offset
#endif /* H3_TYPE_H */
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