Index: trunk/src/obj_arc.c
===================================================================
--- trunk/src/obj_arc.c	(revision 5206)
+++ trunk/src/obj_arc.c	(revision 5207)
@@ -36,6 +36,7 @@
 #include "rotate.h"
 #include "move.h"
 #include "conf_core.h"
+#include "compat_misc.h"
 
 #include "obj_arc.h"
 #include "obj_arc_op.h"
@@ -237,6 +238,21 @@
 		pcb_hash_coord(a->StartAngle) ^ pcb_hash_coord(a->Delta);
 }
 
+pcb_coord_t pcb_arc_length(const pcb_arc_t *arc)
+{
+	double da = pcb_normalize_angle(arc->Delta);
+	double r = (arc->Width + arc->Height) / 2.0; /* TODO: lame approximation */
+	return pcb_round(2.0*r*M_PI*da/360.0);
+}
+
+pcb_coord_t pcb_arc_area(const pcb_arc_t *arc)
+{
+	return
+		pcb_arc_length(arc) * arc->Thickness /* body */
+		+ arc->Thickness * arc->Thickness * M_PI; /* cap circles */
+}
+
+
 /***** operations *****/
 
 /* copies an arc to buffer */
Index: trunk/src/obj_arc.h
===================================================================
--- trunk/src/obj_arc.h	(revision 5206)
+++ trunk/src/obj_arc.h	(revision 5207)
@@ -52,7 +52,6 @@
 void pcb_add_arc_on_layer(pcb_layer_t *Layer, pcb_arc_t *Arc);
 
 
-
 /*** Utility ***/
 void pcb_arc_bbox(pcb_arc_t *Arc);
 void pcb_arc_rotate90(pcb_arc_t *Arc, pcb_coord_t X, pcb_coord_t Y, unsigned Number);
@@ -67,6 +66,11 @@
 void pcb_arc_set_angles(pcb_layer_t *Layer, pcb_arc_t *a, pcb_angle_t new_sa, pcb_angle_t new_da);
 void pcb_arc_set_radii(pcb_layer_t *Layer, pcb_arc_t *a, pcb_coord_t new_width, pcb_coord_t new_height);
 
+pcb_coord_t pcb_arc_length(const pcb_arc_t *arc);
+pcb_coord_t pcb_arc_area(const pcb_arc_t *arc);
+
+
+
 #define	pcb_arc_move(a,dx,dy)                                     \
 	do {                                                            \
 		pcb_coord_t __dx__ = (dx), __dy__ = (dy);                     \