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#include "../moves.h"
void get_king_moves(moves_t* moves, position_t position) {
assert_valid_position(position);
bitboard_t friendly_king;
int king_square;
bitboard_t friendly_pieces;
if (position.turn == WHITE_TURN) {
friendly_pieces = whites(position);
friendly_king = position.bitboards[WHITE_KING];
} else {
friendly_pieces = blacks(position);
friendly_king = position.bitboards[BLACK_KING];
}
king_square = __builtin_ctzll(friendly_king);
bitboard_t movement;
if (king_square >= 10) {
movement = 920078ULL << (king_square - 10);
} else {
movement = 920078ULL >> -(king_square - 10);
}
if (friendly_king & BITMASK_FILE_A) {
movement &= BITMASK_FILE_A | BITMASK_FILE_B;
} else if (friendly_king & BITMASK_FILE_H) {
movement &= BITMASK_FILE_G | BITMASK_FILE_H;
}
movement &= ~friendly_pieces;
while (movement) {
int to = __builtin_ctzll(movement);
movement &= movement - 1;
add_move(moves, king_square, to);
}
}
#ifdef TEST_MOD
#include <stdbool.h>
#include "../bitboard.c"
#include "./moves.c"
bool test_empty_board() {
int i = 0;
while (i++ < 1000000000);
return true;
}
bool test_friendly_pieces() {
return false;
}
#endif
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