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+/*
+      This file is part of GNUnet
+      (C) 2008--2012 Christian Grothoff (and other contributing authors)
+
+      GNUnet 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; either version 3, or (at your
+      option) any later version.
+
+      GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
+      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+      Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * @file testbed/testbed_api_topology.h
+ * @brief header for intra library exported functions
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+
+#ifndef TESTBED_API_TOPOLOGY_H
+#define TESTBED_API_TOPOLOGY_H
+
+/**
+ * Returns the number of links that are required to generate a 2d torus for the
+ * given number of peers. Also returns the arrangment (number of rows and the
+ * length of each row)
+ *
+ * @param num_peers number of peers
+ * @param rows number of rows in the 2d torus. Can be NULL.
+ * @param rows_len the length of each row. This array will be allocated
+ *          fresh. The caller should free it. Can be NULL.
+ */
+unsigned int
+GNUNET_TESTBED_2dtorus_calc_links (unsigned int num_peers, unsigned int *rows,
+                                   unsigned int **rows_len);
+
+
+/**
+ * Get a topology from a string input.
+ *
+ * @param topology where to write the retrieved topology
+ * @param topology_string The string to attempt to
+ *        get a configuration value from
+ * @return GNUNET_YES if topology string matched a
+ *         known topology, GNUNET_NO if not
+ */
+int
+GNUNET_TESTBED_topology_get_ (enum GNUNET_TESTBED_TopologyOption *topology,
+                              const char *topology_string);
+
+
+/**
+ * Returns the string corresponding to the given topology
+ *
+ * @param topology the topology
+ * @return the string (freshly allocated) of given topology; NULL if topology cannot be
+ *           expressed as a string
+ */
+char *
+GNUNET_TESTBED_topology_to_str_ (enum GNUNET_TESTBED_TopologyOption topology);
+
+#endif
+/* end of  testbed_api_topology.h */