@@ -21,10 +21,14 @@
 
 OF_ASSUME_NONNULL_BEGIN
 
 @class OFString;
 @class OFURL;
+
+enum {
+	OF_DATA_SEARCH_BACKWARDS = 1
+};
 
 /*!
  * @class OFData OFData.h ObjFW/OFData.h
  *
  * @brief A class for storing arbitrary data in an array.
@@ -277,10 +281,27 @@
  * @param index The number of the item to return
  * @return The specified item of the OFData
  */
 - (const void *)itemAtIndex: (size_t)index OF_RETURNS_INNER_POINTER;
 
+/*!
+ * @brief Returns the range of the data.
+ *
+ * @param data The data to search for
+ * @param options Options modifying search behavior.@n
+ *		  Possible values are:
+ *		  Value                      | Description
+ *		  ---------------------------|-----------------------------
+ *		  `OF_DATA_SEARCH_BACKWARDS` | Search backwards in the data
+ * @param range The range in which to search
+ * @return The range of the first occurrence of the data or a range with
+ *	   `OF_NOT_FOUND` as start position if it was not found.
+ */
+- (of_range_t)rangeOfData: (OFData *)data
+		  options: (int)options
+		    range: (of_range_t)range;
+
 #ifdef OF_HAVE_FILES
 /*!
  * @brief Writes the OFData into the specified file.
  *
  * @param path The path of the file to write to