Index: route.h
===================================================================
--- route.h	(nonexistent)
+++ route.h	(revision 7704)
@@ -0,0 +1,97 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  PCB, interactive printed circuit board design
+ *  Copyright (C) 1994,1995,1996, 2004 Thomas Nau
+ *  Copyright (C) 2017 Adrian Purser
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  Contact addresses for paper mail and Email:
+ *  Thomas Nau, Schlehenweg 15, 88471 Baustetten, Germany
+ *  Thomas.Nau@rz.uni-ulm.de
+ *
+ */
+
+#ifndef GUARD_PCB_RND_ROUTE_H
+#define GUARD_PCB_RND_ROUTE_H
+
+#include "const.h"
+
+#define ROUTE_SMALL_DATA_SIZE 4
+
+typedef struct {
+	pcb_obj_type_t	type;
+	pcb_point_t			point1;							/* Line: Start Point, Arc: Center Point */	
+	pcb_point_t			point2;							/* Line: End Point */
+	pcb_coord_t			radius;							/* Arc */	
+	pcb_angle_t			start_angle;				/* Arc */
+	pcb_angle_t			delta_angle;				/* Arc */
+	pcb_layer_id_t	layer;
+} pcb_route_object_t;
+
+typedef struct {
+  pcb_point_t						start_point;
+  pcb_point_t						end_point;
+	pcb_coord_t						thickness;
+	pcb_coord_t						clearance;
+	pcb_layer_id_t				start_layer;	/* The ID of the layer that the route started on */
+	pcb_layer_id_t				end_layer;		/* The ID of the layer that the route ended on, usually the same as the start for simple routes*/
+  int										size;					/* The number of active objects in the array */
+  int										capacity;			/* The size of the object array */
+  pcb_route_object_t *	objects;			/* Pointer to the object array data */
+  pcb_route_object_t		small_data[ROUTE_SMALL_DATA_SIZE];	/* Small object array used to avoid allocating memory for small routes */
+} pcb_route_t;
+
+
+void	pcb_route_init(pcb_route_t * p_route);
+void	pcb_route_destroy(pcb_route_t * p_route);
+void	pcb_route_reset(pcb_route_t * p_route);
+void	pcb_route_reserve(pcb_route_t * p_route,int size);
+void	pcb_route_resize(pcb_route_t * p_route,int size);
+
+void	pcb_route_add_line( pcb_route_t * 	p_route,
+													pcb_point_t * 	point1,
+													pcb_point_t * 	point2,
+													pcb_layer_id_t 	layer );
+
+void	pcb_route_add_arc( 	pcb_route_t * 	p_route,
+													pcb_point_t * 	center,
+													pcb_angle_t 		start_angle,
+													pcb_angle_t 		delta,
+													pcb_coord_t 		radius,
+													pcb_layer_id_t	layer );
+
+void	pcb_route_calculate( 	pcb_route_t * 	p_route, 
+														pcb_point_t * 	point1, 
+														pcb_point_t * 	point2,
+														pcb_layer_id_t	layer_id,
+														pcb_coord_t 		thickness, 
+														pcb_coord_t			clearance,
+														int 						mod1,
+														int 						mod2 );
+void	pcb_route_direct( pcb_route_t *   p_route,
+												pcb_point_t *   point1,
+												pcb_point_t *   point2,
+												pcb_layer_id_t  layer,
+												pcb_coord_t     thickness,
+												pcb_coord_t     clearance );
+
+void	pcb_route_apply(const pcb_route_t * p_route);
+
+void	pcb_route_draw( pcb_route_t * p_route,pcb_hid_gc_t GC );
+void	pcb_route_draw_drc( pcb_route_t * p_route,pcb_hid_gc_t GC );
+
+#endif /* ! defined GUARD_PCB_RND_ROUTE_H */