Index: trunk/src/obj_common.c
===================================================================
--- trunk/src/obj_common.c	(revision 26551)
+++ trunk/src/obj_common.c	(revision 26552)
@@ -348,3 +348,27 @@
 {
 	pcb_xform_mx_scale(mx, 0, -1);
 }
+
+void pcb_obj_pre(pcb_any_obj_t *o)
+{
+	switch(o->type) {
+		case PCB_OBJ_LINE: pcb_line_pre((pcb_line_t *)o); break;
+		case PCB_OBJ_TEXT: pcb_text_pre((pcb_text_t *)o); break;
+		case PCB_OBJ_POLY: pcb_poly_pre((pcb_poly_t *)o); break;
+		case PCB_OBJ_ARC:  pcb_arc_pre((pcb_arc_t *)o); break;
+		case PCB_OBJ_PSTK: pcb_pstk_pre((pcb_pstk_t *)o); break;
+		default: break;
+	}
+}
+
+void pcb_obj_post(pcb_any_obj_t *o)
+{
+	switch(o->type) {
+		case PCB_OBJ_LINE: pcb_line_post((pcb_line_t *)o); break;
+		case PCB_OBJ_TEXT: pcb_text_post((pcb_text_t *)o); break;
+		case PCB_OBJ_POLY: pcb_poly_post((pcb_poly_t *)o); break;
+		case PCB_OBJ_ARC:  pcb_arc_post((pcb_arc_t *)o); break;
+		case PCB_OBJ_PSTK: pcb_pstk_post((pcb_pstk_t *)o); break;
+		default: break;
+	}
+}
Index: trunk/src/obj_common.h
===================================================================
--- trunk/src/obj_common.h	(revision 26551)
+++ trunk/src/obj_common.h	(revision 26552)
@@ -230,6 +230,11 @@
 /* Fix an ID in place (replace anything invalid with '_'); returns id */
 char *pcb_obj_id_fix(char *id);
 
+/* switch() on o->type and call the right implementation */
+void pcb_obj_pre(pcb_any_obj_t *o);
+void pcb_obj_post(pcb_any_obj_t *o);
+
+
 #define pcb_obj_id_reg(data, obj) \
 	do { \
 		pcb_any_obj_t *__obj__ = (pcb_any_obj_t *)(obj); \