attacked method
Implementation
bool attacked(Color color, int square) {
for (var i = SQUARES_A8; i <= SQUARES_H1; i++) {
/* did we run off the end of the board */
if ((i & 0x88) != 0) {
i += 7;
continue;
}
/* if empty square or wrong color */
final piece = board[i];
if (piece == null || piece.color != color) continue;
final difference = i - square;
final index = difference + 119;
final type = piece.type;
if ((ATTACKS[index] & (1 << type.shift)) != 0) {
if (type == PAWN) {
if (difference > 0) {
if (color == WHITE) return true;
} else {
if (color == BLACK) return true;
}
continue;
}
/* if the piece is a knight or a king */
if (type == KNIGHT || type == KING) return true;
final offset = RAYS[index];
var j = i + offset;
var blocked = false;
while (j != square) {
if (board[j] != null) {
blocked = true;
break;
}
j += offset;
}
if (!blocked) return true;
}
}
return false;
}