-void open_node PARAMS ((struct obstack *os));
-void output_node PARAMS ((node_t *node, struct obstack *os));
-void close_node PARAMS ((struct obstack *os));
+void add_colorentry PARAMS ((graph_t *g, int color_idx, int red_cp,
+ int green_cp, int blue_cp));
+void add_classname PARAMS ((graph_t *g, int val, const char *name));
+void add_infoname PARAMS ((graph_t *g, int val, const char *name));
+
+void open_node PARAMS ((FILE *fout));
+void output_node PARAMS ((node_t *node, FILE *fout));
+void close_node PARAMS ((FILE *fout));