First commit

node_modules/@ldapjs/dn/lib/utils/parse-string/find-name-start.js

@@ -0,0 +1,34 @@
+'use strict'
+
+// Attribute types must start with an ASCII alphanum character.
+// https://www.rfc-editor.org/rfc/rfc4514#section-3
+// https://www.rfc-editor.org/rfc/rfc4512#section-1.4
+const isLeadChar = (c) => /[a-zA-Z0-9]/.test(c) === true
+
+/**
+ * Find the starting position of an attribute type (name). Leading spaces and
+ * commas are ignored. If an invalid leading character is encountered, an
+ * invalid position will be returned.
+ *
+ * @param {Buffer} searchBuffer
+ * @param {number} startPos
+ *
+ * @returns {number} The position in the buffer where the name starts, or `-1`
+ * if an invalid name starting character is encountered.
+ */
+module.exports = function findNameStart ({ searchBuffer, startPos }) {
+  let pos = startPos
+  while (pos < searchBuffer.byteLength) {
+    if (searchBuffer[pos] === 0x20 || searchBuffer[pos] === 0x2c) {
+      // Skip leading space and comma.
+      pos += 1
+      continue
+    }
+    const char = String.fromCharCode(searchBuffer[pos])
+    if (isLeadChar(char) === true) {
+      return pos
+    }
+    break
+  }
+  return -1
+}