Handle -1 in pause

dart/bin/pause.dart

@@ -1,18 +1,42 @@
-
 import 'dart:io';
 
+import 'package:libac_dart/utils/IOTools.dart';
+
+void echoMode(bool val) {
+  try {
+    stdin.echoMode = val;
+    stdin.lineMode = val;
+  } catch (E) {}
+
+  try {
+    stdin.echoNewlineMode = val;
+  } catch (E) {}
+}
+
 void main(List<String> arguments) {
-  stdout.write('Press any key to continue...');
+  prnt('\rPress any key to continue...');
+
+  echoMode(false);
 
   while (true) {
     int charCode = stdin.readByteSync(); // Read a single byte
-    String char = String.fromCharCode(charCode).toLowerCase(); // Convert byte to character and lowercase it
 
-    // Check if the input is "Enter" or between 'a' and 'z'
+    // Ignore -1 (EOF or invalid input)
-    if (charCode == 10 || (char.compareTo('a') >= 0 && char.compareTo('z') <= 0)) {
+    if (charCode == -1) {
+      continue;
+    }
+
+    // Check if the input is "Enter" (ASCII 10 or 13) or a valid letter from 'a' to 'z' (ASCII 97-122 or 65-90)
+    if (charCode == 10 ||
+        charCode == 13 || // Enter key (line feed or carriage return)
+        (charCode >= 65 && charCode <= 90) || // Uppercase 'A'-'Z'
+        (charCode >= 97 && charCode <= 122)) {
+      // Lowercase 'a'-'z'
       break; // Exit loop if valid input is received
     }
   }
 
-  print(''); // Print a newline for formatting
+  echoMode(true);
+
+  prnt('\r\n'); // Print a newline for formatting
 }