Index: trunk/src/route_style.c
===================================================================
--- trunk/src/route_style.c	(revision 2597)
+++ trunk/src/route_style.c	(revision 2598)
@@ -154,6 +154,13 @@
 	conf_set_design("design/clearance", "%$mS", rst->Clearance);
 }
 
+int pcb_use_route_style_idx(vtroutestyle_t *styles, int idx)
+{
+	if ((idx < 0) || (idx >= vtroutestyle_len(styles)))
+		return -1;
+	pcb_use_route_style(styles->array+idx);
+	return 0;
+}
 
 #define cmp(a,b) (((a) != 0) && ((a) == (b)))
 #define cmps(a,b) (((a) != NULL) && (strcmp((a), (b)) == 0))
Index: trunk/src/route_style.h
===================================================================
--- trunk/src/route_style.h	(revision 2597)
+++ trunk/src/route_style.h	(revision 2598)
@@ -43,8 +43,12 @@
 char *make_route_string(vtroutestyle_t *styles);
 
 /* Set design configuration (the pen we draw with) to a given route style */
-void pcb_use_route_style(RouteStyleType *);
+void pcb_use_route_style(RouteStyleType *rst);
 
+/* Same as pcb_use_route_style() but uses one of the styles in a vector;
+   returns -1 if idx is out of bounds, 0 on success. */
+int pcb_use_route_style_idx(vtroutestyle_t *styles, int idx);
+
 /* Compare supplied parameters to each style in the vector and return the index
    of the first mathcing style. All non-0 parameters need to match to accept
    a style. Return -1 on no match. */