Attach the native entry struct to the ArchiveEntry object.

utils/archive/read_request.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * The request ids for read-related messages to send to the C extension.
+ *
+ * These ids are followed by the entry ids.
  */
 #library("read_request");
 
 final int NEW = 0;
 final int SUPPORT_FILTER_ALL = 1;
 final int SUPPORT_FILTER_BZIP2 = 2;
 final int SUPPORT_FILTER_COMPRESS = 3;
 final int SUPPORT_FILTER_GZIP = 4;
 final int SUPPORT_FILTER_LZMA = 5;
 final int SUPPORT_FILTER_XZ = 6;
@@ skipping 11 matching lines @@
 final int SET_FILTER_OPTIONS = 18;
 final int SET_FORMAT_OPTIONS = 19;
 final int SET_OPTIONS = 20;
 final int OPEN_FILENAME = 21;
 final int OPEN_MEMORY = 22;
 final int NEXT_HEADER = 23;
 final int DATA_BLOCK = 24;
 final int DATA_SKIP = 25;
 final int CLOSE = 26;
 final int FREE = 27;