/*
	This file is part of ctak.

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with Takwrap.  If not, see <https://www.gnu.org/licenses/>.
*/

#ifndef TT_LLCHT_H
#define TT_LLCHT_H

#include <stdlib.h>
#include <stdint.h>

#include <actions.h>

// ===================================================================
// Types
// ===================================================================

enum TT_FLAG { TT_EXACT, TT_LOWERBOUND, TT_UPPERBOUND };

typedef struct tt_node_s {
	uint64_t key;
	struct tt_node_s *next;
	enum TT_FLAG flag;
	uint8_t depth;
	float value;
	action_t action;
} tt_entry_t;

// ===================================================================
// Variables
// ===================================================================

#define TT_LLCHT_SIZE ((uint32_t)((1<<19) - 1))

extern uint32_t tt_num_cached;

// ===================================================================
// Methods
// ===================================================================

int tt_init(void);
void tt_free(void);

tt_entry_t *tt_seek(const uint64_t key);

int tt_insert(const uint64_t key, const enum TT_FLAG flag,
							const uint8_t depth, const float value,
							const action_t action);

#endif