Added predict to o-x-rust

wasm/o-x-rust/src/lib.rs

@@ -56,3 +56,25 @@ pub fn get_score(me: u8, other: u8, first: bool, board: &[u8]) -> i32 {
 	}
 	score
 }
+
+#[wasm_bindgen]
+pub fn predict(me: u8, other: u8, first: bool, board: &[u8]) -> usize {
+	let (mut max_p, mut max_s) = (0, i32::MIN);
+	let empty = count_empty(board);
+	if empty == 0 {
+		return 0;
+	}
+	for i in 0..9 {
+		if board[i] != 0 {
+			continue;
+		}
+		let copy = &mut [0u8; 9];
+		copy.copy_from_slice(board);
+		copy[i] = get_turn(me, other, first, empty);
+		let score = get_score(me, other, first, board);
+		if score > max_s {
+			(max_p, max_s) = (i, score);
+		}
+	}
+	max_p
+}