Lots of new algorithms and cleanups of old ones

[SVN r27579]

src/python/connected_components.cpp

@@ -0,0 +1,51 @@
+// Copyright 2005 The Trustees of Indiana University.
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//  Authors: Douglas Gregor
+//           Andrew Lumsdaine
+#include <boost/graph/connected_components.hpp>
+#include "graph.hpp"
+#include "digraph.hpp"
+#include <boost/python.hpp>
+
+namespace boost { namespace graph { namespace python {
+
+template<typename Graph>
+int
+connected_components
+  (Graph& g,
+   const vector_property_map<int, typename Graph::VertexIndexMap>* in_component,
+   const vector_property_map<default_color_type, 
+                             typename Graph::VertexIndexMap>* in_color)
+{
+  typedef vector_property_map<int, typename Graph::VertexIndexMap> ComponentMap;
+
+  typedef vector_property_map<default_color_type, 
+                              typename Graph::VertexIndexMap> ColorMap;
+
+  ComponentMap component = 
+    in_component? *in_component : g.template get_vertex_map<int>("component");
+
+  ColorMap color = 
+    in_color? *in_color : ColorMap(g.num_vertices(), g.get_vertex_index_map());
+
+  return boost::connected_components(g, component, color_map(color));
+}
+
+void export_connected_components()
+{
+  using boost::python::arg;
+  using boost::python::def;
+
+  def("connected_components", &connected_components<Graph>,
+      (arg("graph"), 
+       arg("component_map") = 
+         (vector_property_map<int, Graph::VertexIndexMap>*)0,
+       arg("color_map") = 
+         (vector_property_map<default_color_type, Graph::VertexIndexMap>*)0));
+}
+
+} } } // end namespace boost::graph::python