| <!doctype html> |
| <title>Lua interpreter</title> |
| |
| <script src="../../build/libv86.js"></script> |
| <script> |
| "use strict"; |
| |
| window.onload = function() |
| { |
| var emulator = new V86Starter({ |
| memory_size: 32 * 1024 * 1024, |
| vga_memory_size: 2 * 1024 * 1024, |
| |
| // Uncomment to see what's going on |
| //screen_container: document.getElementById("screen_container"), |
| |
| bios: { |
| url: "../../bios/seabios.bin", |
| }, |
| vga_bios: { |
| url: "../../bios/vgabios.bin", |
| }, |
| cdrom: { |
| url: "../../images/linux.iso", |
| }, |
| autostart: true, |
| disable_keyboard: true, |
| }); |
| |
| var data = ""; |
| |
| emulator.add_listener("serial0-output-char", function(char) |
| { |
| if(char !== "\r") |
| { |
| data += char; |
| } |
| |
| if(data.endsWith("login: ")) |
| { |
| console.log("Do login"); |
| emulator.serial0_send("root\n"); |
| } |
| else if(data.endsWith("/root% ")) |
| { |
| console.log("Now ready"); |
| document.getElementById("status").textContent = "Ready.\n"; |
| document.getElementById("run").disabled = false; |
| } |
| }); |
| |
| emulator.add_listener("serial0-output-line", function(line) |
| { |
| // filter noise |
| if(!line.startsWith("/root% lua -e") && |
| !line.startsWith("> ") && |
| line.indexOf("Welcome to Buildroot") === -1 && |
| line.indexOf("login:") === -1 && |
| line.trim() !== "") |
| { |
| document.getElementById("result").textContent += line; |
| } |
| }); |
| |
| document.getElementById("source").onkeydown = function(e) |
| { |
| if(e.which == 13 && e.ctrlKey) |
| { |
| document.getElementById("run").onclick(); |
| } |
| }; |
| |
| document.getElementById("run").onclick = function() |
| { |
| var code = document.getElementById("source").value; |
| |
| emulator.serial0_send("lua -e " + bashEscape(code) + "\n"); |
| |
| document.getElementById("result").textContent = ""; |
| document.getElementById("status").textContent = "Running ...\n"; |
| this.disabled = true; |
| }; |
| }; |
| |
| // https://gist.github.com/creationix/2502704 |
| // Implement bash string escaping. |
| function bashEscape(arg) |
| { |
| return "'" + arg.replace(/'+/g, function (val) { |
| return "'" + val.replace(/'/g, "\\'") + "'"; |
| }) + "'"; |
| } |
| </script> |
| |
| <textarea id=source rows=20 cols=80> |
| k = 1 |
| x = 0 |
| |
| while k < 1000 do |
| x = x + 1 / (k * k) |
| k = k + 2 |
| end |
| |
| print(math.sqrt(x*8)) |
| |
| function factorial(n) |
| if n == 0 then |
| return 1 |
| else |
| return n * factorial(n - 1) |
| end |
| end |
| |
| print("factorial(10):", factorial(10)) |
| </textarea> |
| <button disabled id=run>run (ctrl-enter)</button> |
| <br> |
| <hr> |
| <pre id=status>Wait for boot ...</pre> |
| <pre id=result></pre> |
| |
| <hr> |
| |
| <div id="screen_container"> |
| <div style="white-space: pre; font: 14px monospace; line-height: 14px"></div> |
| <canvas style="display: none"></canvas> |
| </div> |