From 11a84d2a50a791eb36fc12576335cf6158109c80 Mon Sep 17 00:00:00 2001
From: Martin Quinson <martin.quinson@loria.fr>
Date: Tue, 14 Feb 2017 01:45:05 +0100
Subject: [PATCH] complete a bit the C wrapper of s4u::Host

---
 include/simgrid/host.h |  6 ++++--
 src/simgrid/host.cpp   | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/include/simgrid/host.h b/include/simgrid/host.h
index e1d6c26daf..4fd737bff0 100644
--- a/include/simgrid/host.h
+++ b/include/simgrid/host.h
@@ -51,8 +51,10 @@ XBT_PUBLIC(int) sg_host_get_nb_pstates(sg_host_t host);
 XBT_PUBLIC(int) sg_host_get_pstate(sg_host_t host);
 XBT_PUBLIC(void) sg_host_set_pstate(sg_host_t host,int pstate);
 XBT_PUBLIC(xbt_dict_t) sg_host_get_properties(sg_host_t host);
-XBT_PUBLIC(const char *) sg_host_get_property_value(sg_host_t host,
-                                                     const char *name);
+XBT_PUBLIC(const char*) sg_host_get_property_value(sg_host_t host, const char* name);
+XBT_PUBLIC(void) sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links);
+XBT_PUBLIC(double) sg_host_route_latency(sg_host_t from, sg_host_t to);
+XBT_PUBLIC(double) sg_host_route_bandwidth(sg_host_t from, sg_host_t to);
 XBT_PUBLIC(void) sg_host_dump(sg_host_t ws);
 SG_END_DECL()
 
diff --git a/src/simgrid/host.cpp b/src/simgrid/host.cpp
index 9808aa6f69..30988adcff 100644
--- a/src/simgrid/host.cpp
+++ b/src/simgrid/host.cpp
@@ -189,6 +189,48 @@ const char *sg_host_get_property_value(sg_host_t host, const char *name)
 {
   return (const char*) xbt_dict_get_or_null(sg_host_get_properties(host), name);
 }
+/**
+ * \brief Find a route between two hosts
+ *
+ * \param from where from
+ * \param to where to
+ * \param links [OUT] where to store the list of links (must exist, cannot be nullptr).
+ */
+void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links)
+{
+  std::vector<simgrid::s4u::Link*> vlinks;
+  from->routeTo(to, &vlinks, nullptr);
+  for (auto link : vlinks)
+    xbt_dynar_push(links, &link);
+}
+/**
+ * \brief Find the latency of the route between two hosts
+ *
+ * \param from where from
+ * \param to where to
+ */
+double sg_host_route_latency(sg_host_t from, sg_host_t to)
+{
+  std::vector<simgrid::s4u::Link*> vlinks;
+  double res = 0;
+  from->routeTo(to, &vlinks, &res);
+  return res;
+}
+/**
+ * \brief Find the bandwitdh of the route between two hosts
+ *
+ * \param from where from
+ * \param to where to
+ */
+double sg_host_route_bandwidth(sg_host_t from, sg_host_t to)
+{
+  std::vector<simgrid::s4u::Link*> vlinks;
+  from->routeTo(to, &vlinks, nullptr);
+  double res = 0;
+  for (auto link : vlinks)
+    res += link->bandwidth();
+  return res;
+}
 
 /** @brief Displays debugging information about a host */
 void sg_host_dump(sg_host_t host)
-- 
2.20.1