+
+/** @brief Load a graph from a file (in the SimGrid Graph format) */
+xbt_graph_t xbt_graph_load (const char *filename)
+{
+ FILE *file = NULL;
+ ssize_t read;
+ file = fopen (filename, "r");
+ xbt_assert(file, "Failed to open %s \n", filename);
+
+ xbt_dict_t nodes_dict = xbt_dict_new ();
+ xbt_graph_t ret = xbt_graph_new_graph (0, NULL);
+
+ //read the number of nodes
+ size_t size;
+ char *nnodes_str = NULL;
+ read = getline (&nnodes_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read the number of nodes (errno = %d)", errno);
+ int i, nnodes = atoi (nnodes_str);
+ free (nnodes_str);
+
+ //read all nodes
+ for (i = 0; i < nnodes; i++){
+ char *node_str = NULL;
+ read = getline (&node_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read all nodes (errno = %d)", errno);
+ xbt_node_t n;
+ char *name = xbt_strdup (node_str);
+ xbt_str_subst (name, '\n', '\0', 0);
+ n = xbt_graph_new_node (ret, name);
+ xbt_dict_set (nodes_dict, name, n, NULL);
+ free (node_str);
+ }
+
+ //read the number of edges
+ char *nedges_str = NULL;
+ read = getline (&nedges_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read the number of edges (errno = %d)", errno);
+ int nedges = atoi (nedges_str);
+ free (nedges_str);
+
+ //read all edges
+ for (i = 0; i < nedges; i++){
+ char *edge_str = NULL, edge_id[200], node_source[200], node_target[200];
+ read = getline (&edge_str, &size, file);
+ if (read == -1)
+ THROWF(system_error, 0, "getline failed to read all edges (errno = %d)", errno);
+ sscanf (edge_str, "%s %s %s", edge_id, node_source, node_target);
+ free (edge_str);
+ xbt_str_subst (edge_id, '\n', '\0', 0);
+ xbt_str_subst (node_source, '\n', '\0', 0);
+ xbt_str_subst (node_target, '\n', '\0', 0);
+
+ xbt_node_t source = xbt_dict_get (nodes_dict, node_source);
+ xbt_node_t target = xbt_dict_get (nodes_dict, node_target);
+ xbt_graph_new_edge (ret, source, target, xbt_strdup(edge_id));
+ }
+ xbt_dict_free (&nodes_dict);
+ return ret;
+}
+
+/** @brief Save a graph from a file (in the SimGrid Graph format) */
+void xbt_graph_save (xbt_graph_t span,
+ const char *filename,
+ const char *(nname) (xbt_node_t),
+ const char *(ename) (xbt_edge_t))
+{
+ FILE *file = NULL;
+ file = fopen(filename, "w");
+ xbt_assert(file, "Failed to open %s \n", filename);
+
+ xbt_dynar_t nodes = xbt_graph_get_nodes (span);
+ xbt_dynar_t edges = xbt_graph_get_edges (span);
+ unsigned int cpt;
+ xbt_node_t node;
+ fprintf (file, "%ld\n", xbt_dynar_length (nodes));
+ xbt_dynar_foreach (nodes, cpt, node) {
+ if (nname){
+ fprintf (file, "%s\n", nname(node));
+ }else{
+ fprintf (file, "%p\n", node);
+ }
+ }
+ fprintf (file, "%ld\n", xbt_dynar_length (edges));
+ xbt_edge_t edge;
+ xbt_dynar_foreach (edges, cpt, edge) {
+ xbt_node_t source = xbt_graph_edge_get_source (edge);
+ xbt_node_t target = xbt_graph_edge_get_target (edge);
+ if (ename){
+ if (nname){
+ fprintf (file, "%s %s %s\n", ename(edge), nname(source), nname(target));
+ }else{
+ fprintf (file, "%s %p %p\n", ename(edge), source, target);
+ }
+ }else{
+ if (nname){
+ fprintf (file, "%p %s %s\n", edge, nname(source), nname(target));
+ }else{
+ fprintf (file, "%p %p %p\n", edge, source, target);
+ }
+ }
+ }
+ fclose (file);
+}