Program Listing for File pathfinder_frontier.h

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/* BSD 3-Clause License
 *
 * Copyright © 2008-2025, Jice and the libtcod contributors.
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 * modification, are permitted provided that the following conditions are met:
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 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    and/or other materials provided with the distribution.
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 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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#pragma once
#ifndef TCOD_PATHFINDER_FRONTIER_H
#define TCOD_PATHFINDER_FRONTIER_H

#include <stdint.h>

#include "config.h"
#include "error.h"
#include "heapq.h"

#define TCOD_PATHFINDER_MAX_DIMENSIONS 4

struct TCOD_Frontier {
  int8_t ndim;
  int active_dist;
  int active_index[TCOD_PATHFINDER_MAX_DIMENSIONS];
  struct TCOD_Heap heap;
};
#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus
TCOD_PUBLIC TCOD_NODISCARD struct TCOD_Frontier* TCOD_frontier_new(int ndim);
TCOD_PUBLIC void TCOD_frontier_delete(struct TCOD_Frontier* frontier);
TCOD_PUBLIC TCOD_Error TCOD_frontier_pop(struct TCOD_Frontier* frontier);
TCOD_PUBLIC TCOD_Error
TCOD_frontier_push(struct TCOD_Frontier* __restrict frontier, const int* __restrict index, int dist, int heuristic);
TCOD_PUBLIC TCOD_NODISCARD int TCOD_frontier_size(const struct TCOD_Frontier* frontier);
TCOD_PUBLIC TCOD_Error TCOD_frontier_clear(struct TCOD_Frontier* frontier);
#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus
#endif  // TCOD_PATHFINDER_FRONTIER_H