a bunch of mini optimizations

include/engine.hpp

@@ -1,39 +1,27 @@
-#ifndef ENGINE_HPP
-#define ENGINE_HPP
+#pragma once
 
 #include <array>
-#include <ncurses.h>
 #include <string>
 
-constexpr int ROW = 3;
-constexpr int COL = 3;
-
 struct Window {
 	Window();
-	std::array<char, ROW * COL> view;
+	std::array<char, 9> view;
 	void draw_display() const;
 };
 
 class Engine {
 public:
 	Engine();
-	~Engine() { endwin(); };
+	~Engine();
 	void run();
 
 private:
-	struct Player {
-		Player(char id) : id(id) {};
-		const char id;
-	};
-
 	std::string status;
 	Window win;
-	Player player1 { 'x' };
-	Player player2 { 'o' };
-	Player *temp { &player1 };
+	char p1 { 'x' };
+	char p2 { 'o' };
+	char temp { p1 };
 	bool process_input();
-	bool exit_code();
+	bool check_game_over();
 	bool check_line(char id) const;
 };
-
-#endif

src/engine.cpp

@@ -1,7 +1,8 @@
-#include <cctype>
 #include <engine.hpp>
+#include <algorithm>
+#include <array>
 #include <chrono>
-#include <iostream>
+#include <ncurses.h>
 #include <thread>
 
 Window::Window() {
@@ -9,14 +10,12 @@ Window::Window() {
 }
 
 void Window::draw_display() const {
-	std::cout << "\033[H"
-		<< view[0] << " | " << view[1] << " | " << view[2]
-		<< "\r\n- + - + -\r\n"
-		<< view[3] << " | " << view[4] << " | " << view[5]
-		<< "\r\n- + - + -\r\n"
-		<< view[6] << " | " << view[7] << " | " << view[8]
-		<< "\r\n"
-	<< std::flush;
+	clear();
+	mvprintw(0, 0, " %c | %c | %c ", view[0], view[1], view[2]);
+	mvprintw(1, 0, " - + - + - ");
+	mvprintw(2, 0, " %c | %c | %c ", view[3], view[4], view[5]);
+	mvprintw(3, 0, " - + - + - ");
+	mvprintw(4, 0, " %c | %c | %c ", view[6], view[7], view[8]);
 }
 
 Engine::Engine() {
@@ -27,23 +26,28 @@ Engine::Engine() {
 	nodelay(stdscr, true);
 }
 
+Engine::~Engine() { endwin(); }
+
 void Engine::run() {
 	while (process_input()) {
-		bool game_over = exit_code();
-		if(!game_over) { status = "Current Player: " + std::string(1, temp->id) + "\n"; }
+		bool game_over = check_game_over();
+		if(!game_over) { status = "Current Player: " + std::string(1, temp) + "\n"; }
 		win.draw_display();
-		std::cout << status;
+		mvprintw(6, 0, status.c_str());
+		refresh();
 		if(game_over) { break; }
-		std::this_thread::sleep_for(std::chrono::milliseconds(150));
 	}
+
+	mvprintw(7, 0, "Press any key to quit.");
+	nodelay(stdscr, false);
+	getch();
 }
 
-bool Engine::exit_code() {
-	if(check_line(player1.id)) { status = "Game Over! Player 1 wins!"; return true; }
-	if(check_line(player2.id)) { status = "Game Over! Player 2 wins!"; return true; }
-	if(std::count(win.view.begin(), win.view.end(), ' ') == 0) {
-		status = "Game Over! It's a tie!";
-		return true;
+bool Engine::check_game_over() {
+	if(check_line(p1)) { return status = "Game Over! Player 1 wins!", true; }
+	if(check_line(p2)) { return status = "Game Over! Player 2 wins!", true; }
+	if(std::ranges::count(win.view, ' ') == 0) {
+		return status = "Game Over! It's a tie!", true;
 	}
 
 	return false;
@@ -51,23 +55,27 @@ bool Engine::exit_code() {
 
 bool Engine::process_input() {
 	int ch, index;
+	bool hit = false;
 	while((ch = getch()) != ERR) {
+		hit = true;
 		if(ch == 'q') { return false; }
-		if(ch >= '1' && ch <= '9') {
-			index = ch - '1';
-			if(win.view[index] == ' ') { win.view[index] = temp->id; }
-			temp = (temp == &player1) ? &player2 : &player1;
+		if(ch < '1' || ch > '9') continue;
+		index = ch - '1';
+		if(win.view[index] == ' ') {
+			win.view[index] = temp;
+			temp = (temp == p1) ? p2 : p1;
 		}
 	}
+	if(!hit) { std::this_thread::sleep_for(std::chrono::milliseconds(150)); }
 	return true;
 }
 
 bool Engine::check_line(char id) const {
-	static constexpr int wins[8][3] = {
+	static constexpr std::array<std::array<int, 3>, 8> wins = {{
 		{0, 1, 2}, {3, 4, 5}, {6, 7, 8},
 		{0, 3, 6}, {1, 4, 7}, {2, 5, 8},
 		{0, 4, 8}, {2, 4, 6}
-	};
+	}};
 	for(const auto& i : wins) {
 		if(win.view[i[0]] == id && win.view[i[1]] == id && win.view[i[2]] == id) {
 			return true;