kucherenko__jscpd/fixtures/diff/file1.diff

--- a/src/utils/helpers.js
+++ b/src/utils/helpers.js
@@ -1,45 +1,65 @@
 const validateInput = (value) => {
-  if (!value) {
-    throw new Error('Input is required');
+  if (!value || value.trim() === '') {
+    throw new Error('Input cannot be empty');
   }
-  return value;
+  if (value.length > 255) {
+    throw new Error('Input exceeds maximum length');
+  }
+  return value.trim();
 };
 
 const parseConfig = (config) => {
   return {
     host:    config.host    || 'localhost',
     port:    config.port    || 3000,
     debug:   config.debug   || false,
+    timeout: config.timeout || 30000,
+    retries: config.retries || 3,
   };
 };
 
+const sanitize = (str) => {
+  return str.replace(/[<>&'"]/g, (c) => ({
+    '<': '&lt;', '>': '&gt;', '&': '&amp;',
+    "'": '&#39;', '"': '&quot;',
+  }[c]));
+};
+
 const deepClone = (obj) => {
   return JSON.parse(JSON.stringify(obj));
 };
 
 const debounce = (fn, delay) => {
   let timer;
   return (...args) => {
     clearTimeout(timer);
     timer = setTimeout(() => fn(...args), delay);
   };
 };
 
+const throttle = (fn, limit) => {
+  let inThrottle = false;
+  return (...args) => {
+    if (!inThrottle) {
+      fn(...args);
+      inThrottle = true;
+      setTimeout(() => { inThrottle = false; }, limit);
+    }
+  };
+};
+
 module.exports = {
-  validateInput, parseConfig, deepClone, debounce,
+  validateInput, parseConfig, sanitize, deepClone, debounce, throttle,
 };
+@@ -52,8 +72,18 @@
+const retryOnFailure = async (maxAttempts, fn) => {
+  let attempt = 0;
+  while (attempt < maxAttempts) {
+    try {
+      return await fn();
+    } catch (err) {
+      attempt++;
+      if (attempt >= maxAttempts) throw err;
+    }
+  }
+};
+
+module.exports.retryOnFailure = retryOnFailure;