1 files changed, 74 insertions, 0 deletions
diff --git a/storage/oqgraph/oqgraph_shim.cc b/storage/oqgraph/oqgraph_shim.cc
new file mode 100644
index 00000000..3633b034
--- /dev/null
+++ b/storage/oqgraph/oqgraph_shim.cc
@@ -0,0 +1,74 @@
+/* Copyright (C) 2007-2013 Arjen G Lentz & Antony T Curtis for Open Query
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+/* ======================================================================
+   Open Query Graph Computation Engine, based on a concept by Arjen Lentz
+   v3 implementation by Antony Curtis, Arjen Lentz, Andrew McDonnell
+   For more information, documentation, support, enhancement engineering,
+   see http://openquery.com/graph or contact graph@openquery.com
+   ======================================================================
+*/
+
+#include "oqgraph_shim.h"
+
+bool oqgraph3::edge_iterator::seek()
+{
+  if (!_graph->_cursor ||
+      _graph->_rnd_pos > _offset ||
+      _graph->_cursor != _graph->_rnd_cursor.operator->())
+  {
+    _graph->_rnd_pos= 0;
+    _graph->_rnd_cursor= new cursor(_graph);
+    if (_graph->_rnd_cursor->seek_to(boost::none, boost::none))
+      _graph->_rnd_pos= size_t(-1);
+  }
+  while (_graph->_rnd_pos < _offset)
+  {
+    if (_graph->_rnd_cursor->seek_next())
+    {
+      _offset = size_t(-1);
+      return true;
+    }
+    _graph->_rnd_pos++;
+  }
+  return false;
+}
+
+oqgraph3::edge_iterator::value_type oqgraph3::edge_iterator::operator*()
+{
+  seek();
+  return *_graph->_rnd_cursor;
+}
+
+bool oqgraph3::edge_iterator::operator==(const self& x)
+{
+  if (_offset == size_t(-1) && x._offset != size_t(-1))
+    return const_cast<edge_iterator&>(x).seek();
+  if (_offset != size_t(-1) && x._offset == size_t(-1))
+    return seek();
+
+  return _offset == x._offset;
+}
+
+bool oqgraph3::edge_iterator::operator!=(const self& x)
+{
+  if (_offset == size_t(-1) && x._offset != size_t(-1))
+    return !const_cast<edge_iterator&>(x).seek();
+  if (_offset != size_t(-1) && x._offset == size_t(-1))
+    return !seek();
+
+  return _offset != x._offset;
+}