43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/* bitboard.c - bitboard functions.
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*
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* Copyright (C) 2024 Bruno Raoult ("br")
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* Licensed under the GNU General Public License v3.0 or later.
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* Some rights reserved. See COPYING.
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*
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* You should have received a copy of the GNU General Public License along with this
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* program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
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*
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*/
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#include "brlib.h"
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#include "bitboard.h"
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/* maps are clockwise from N */
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static char knight_vector[8] = {
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NORTH*2 + EAST, NORTH + EAST*2, SOUTH + EAST*2, SOUTH*2 + EAST,
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SOUTH*2 + WEST, SOUTH + WEST*2, NORTH + WEST*2, NORTH*2 + WEST
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};
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static char king_vector[8] = {
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NORTH, NORTH_EAST, EAST, SOUTH_EAST,
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SOUTH, SOUTH_WEST, WEST, NORTH_WEST
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};
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static u64 knight_attacks[64], king_attacks[64];
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static int zob=0;
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void bitboard_init(void)
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{
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for (int sq = SQ_0; sq < SQ_N; ++sq) {
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/* knight/king */
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for (int j = 0; j < 8; ++j) {
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zob += *knight_attacks + *king_attacks + *knight_vector +
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*king_vector;
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//int dest_knight = sq + knight_vector[j];
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//if ()
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}
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}
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}
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