Double-quote nodes in graphviz network file

This is needed for all nodes with a name starting with a digit,
otherwise the ID would be interpreted as a numeral.

diff --git a/src/graph.c b/src/graph.c
index 3529d01..c63fdf9 100644 (file)
--- a/src/graph.c
+++ b/src/graph.c
@@ -360,13 +360,13 @@ void dump_graph(void) {
        /* dump all nodes first */
        for(node = node_tree->head; node; node = node->next) {
                n = node->data;
-               fprintf(file, " %s [label = \"%s\"];\n", n->name, n->name);
+               fprintf(file, " \"%s\" [label = \"%s\"];\n", n->name, n->name);
        }
 
        /* now dump all edges */
        for(node = edge_weight_tree->head; node; node = node->next) {
                e = node->data;
-               fprintf(file, " %s -> %s;\n", e->from->name, e->to->name);
+               fprintf(file, " \"%s\" -> \"%s\";\n", e->from->name, e->to->name);
        }
 
        fprintf(file, "}\n");