Implement bookmarks for ExternalStreamingStream.

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 1204 matching lines @@
      * two data chunks, but doesn't handle multi-byte characters split between
      * more than two data chunks. The embedder can avoid this problem by always
      * returning at least 2 bytes of data.
      *
      * If the embedder wants to cancel the streaming, they should make the next
      * GetMoreData call return 0. V8 will interpret it as end of data (and most
      * probably, parsing will fail). The streaming task will return as soon as
      * V8 has parsed the data it received so far.
      */
     virtual size_t GetMoreData(const uint8_t** src) = 0;
+
+    /**
+     * V8 calls this method to set a 'bookmark' at the current position in
+     * the source stream, for the purpose of (maybe) later calling
+     * ResetToBookmark. If ResetToBookmark is called later, then subsequent
+     * calls to GetMoreData should return the same data as they did when
+     * SetBookmark was called earlier.
+     *
+     * The embedder may return 'false' to indicate it cannot provide this
+     * functionality.
+     */
+    virtual bool SetBookmark();
+
+    /**
+     * V8 calls this to return to a previously set bookmark.
+     */
+    virtual void ResetToBookmark();
   };
 
 
   /**
    * Source code which can be streamed into V8 in pieces. It will be parsed
    * while streaming. It can be compiled after the streaming is complete.
    * StreamedSource must be kept alive while the streaming task is ran (see
    * ScriptStreamingTask below).
    */
   class V8_EXPORT StreamedSource {
@@ skipping 6880 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_