Added predict to o-x-rust

wasm/o-x-rust/Cargo.lock

@@ -25,7 +25,7 @@ dependencies = [
 
 [[package]]
 name = "o-x-rust"
-version = "0.0.3"
+version = "0.0.4"
 dependencies = [
  "wasm-bindgen",
 ]

wasm/o-x-rust/Cargo.toml

@@ -4,7 +4,7 @@ description = "Naughts and crosses WASM algorithms"
 repository = "https://git.koval.net/cyclane/game-algorithms/src/branch/main/wasm/o-x-rust"
 license = "GNU GPLv3"
 readme = "README.md"
-version = "0.0.3"
+version = "0.0.4"
 edition = "2021"
 
 [lib]

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
+}