M web/assets/hex-playground.js → web/assets/hex-playground.js

@@ -1,21 +1,44 @@ 
-let stdinBuffer = [];
-const inputBox = document.querySelector("article input")
-inputBox.addEventListener("keydown", (event) => {
-    if (event.key === "Enter" && !event.shiftKey) {
-        event.preventDefault();
-        const input = inputBox.value;
-        inputBox.value = ""; // Clear the textarea
-        stdinBuffer.push(...input + "\n"); // Add input to the buffer
+Module.preRun = () => {
+
+    let stdinBuffer = [];
+    const inputBox = document.querySelector("article input")
+    const input = inputBox.value;
+    inputBox.addEventListener("keydown", (event) => {
+        if (event.key === "Enter" && !event.shiftKey) {
+            event.preventDefault();
+            inputBox.value = ""; // Clear the textarea
+            stdinBuffer.push(...input + "\n"); // Add input to the buffer
+          }
+    });
+    function stdin() {
+        if (i < input.length) {
+            var code = input.charCodeAt(i);
+            ++i;
+            return code;
+          } else {
+            return null;
+          }
+    };
+
+    let stdoutBuffer = "";
+    function stdout(code) {
+      if (code === "\n".charCodeAt(0) && stdoutBuffer !== "") {
+        document.querySelector("article section").textContent += stdoutBuffer + "\n";
+        stdoutBuffer = "";
+      } else {
+        stdoutBuffer += String.fromCharCode(code);
       }
-});
+    }
 
-Module.print = (text) => {
-    document.querySelector("article section").textContent += text + "\n";
-};
-Module.printErr = (text) => {
-    document.querySelector("article section").textContent += text + "\n";
-};
-Module.stdin = () => {
-    return stdinBuffer.length > 0 ? stdinBuffer.shift().charCodeAt(0) : null;
-};
+    let stderrBuffer = "";
+    function stderr(code) {
+      if (code === "\n".charCodeAt(0) && stderrBuffer !== "") {
+        document.querySelector("article section").textContent += stderrBuffer + "\n";
+        stderrBuffer = "";
+      } else {
+        stderrBuffer += String.fromCharCode(code);
+      }
+    }
+    FS.init(stdin, stdout, stderr);
+}