initial o-x-rust implementation complete
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@ -25,7 +25,7 @@ dependencies = [
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[[package]]
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name = "o-x-rust"
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version = "0.0.2"
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version = "0.0.3"
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dependencies = [
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"wasm-bindgen",
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]
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@ -4,7 +4,7 @@ description = "Naughts and crosses WASM algorithms"
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repository = "https://git.koval.net/cyclane/game-algorithms/src/branch/main/wasm/o-x-rust"
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license = "GNU GPLv3"
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readme = "README.md"
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version = "0.0.2"
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version = "0.0.3"
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edition = "2021"
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[lib]
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@ -1,6 +1,58 @@
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use wasm_bindgen::prelude::wasm_bindgen;
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#[wasm_bindgen]
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pub fn add(a: usize, b: usize) -> usize {
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a + b
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pub fn find_winner(board: &[u8]) -> u8 {
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for i in 0..3 {
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let h = i*3;
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if board[h] == board[h + 1] && board[h + 1] == board[h + 2] {
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return board[h];
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}
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if board[i] == board[i + 3] && board[i + 3] == board[i + 6] {
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return board[i];
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}
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}
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if board[0] == board[4] && board[4] == board[8] {
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return board[0];
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}
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if board[2] == board[4] && board[4] == board[6] {
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return board[2];
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}
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0
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}
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#[wasm_bindgen]
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pub fn count_empty(board: &[u8]) -> usize {
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board.iter().filter(|&n| *n == 0).count()
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}
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#[wasm_bindgen]
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pub fn get_turn(me: u8, other: u8, first: bool, empty: usize) -> u8 {
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if empty % 2 == if first { 1 } else { 0 } {
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me
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} else {
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other
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}
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}
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#[wasm_bindgen]
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pub fn get_score(me: u8, other: u8, first: bool, board: &[u8]) -> i32 {
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let winner = find_winner(board);
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if winner != 0 {
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return if winner == me { 1 } else { -1 };
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}
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let empty = count_empty(board);
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if empty == 0 {
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return 0;
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}
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let mut score = 0;
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for i in 0..9 {
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if board[i] != 0 {
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continue;
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}
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let copy = &mut [0u8; 9];
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copy.copy_from_slice(board);
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copy[i] = get_turn(me, other, first, empty);
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score += get_score(me, other, first, copy);
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}
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score
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}
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