Index: trunk/src_plugins/lib_netmap/map_2nets.c
===================================================================
--- trunk/src_plugins/lib_netmap/map_2nets.c	(revision 34950)
+++ trunk/src_plugins/lib_netmap/map_2nets.c	(revision 34951)
@@ -54,7 +54,9 @@
 	if (seg == NULL)
 		return;
 
-	ns = malloc(sizeof(pcb_2netmap_iseg_t));
+	ns = calloc(sizeof(pcb_2netmap_iseg_t), 1);
+	ns->next = map->isegs;
+	map->isegs = ns;
 	ns->seg = seg;
 	ns->net = NULL;
 
@@ -98,6 +100,21 @@
 	list_obj(ctx, pcb, NULL, (pcb_any_obj_t *)ps);
 }
 
+static pcb_2netmap_oseg_t *oseg_new(pcb_2netmap_t *map, pcb_net_t *net)
+{
+	pcb_2netmap_oseg_t *os;
+	os = calloc(sizeof(pcb_2netmap_iseg_t), 1);
+	os->next = map->isegs;
+	map->isegs = os;
+	os->net = net;
+	return os;
+}
+
+static void map_segs(pcb_2netmap_t *map)
+{
+	
+}
+
 int pcb_map_2nets_init(pcb_2netmap_t *map, pcb_board_t *pcb, pcb_2netmap_control_t how)
 {
 	pcb_qry_exec_t ec;
@@ -122,6 +139,7 @@
 
 	/* the result is really a graph because of junctions; search random paths
 	   from terminal to terminal (junctions resolved into overlaps) */
+	map_segs(map);
 
 	pcb_qry_uninit(&ec);
 
Index: trunk/src_plugins/lib_netmap/map_2nets.h
===================================================================
--- trunk/src_plugins/lib_netmap/map_2nets.h	(revision 34950)
+++ trunk/src_plugins/lib_netmap/map_2nets.h	(revision 34951)
@@ -34,12 +34,14 @@
 	PCB_2NETMAPCTRL_RATS = 1      /* include rat lines */
 } pcb_2netmap_control_t;
 
-typedef struct pcb_2netmap_iseg_s {
+typedef struct pcb_2netmap_iseg_s pcb_2netmap_iseg_t;
+struct pcb_2netmap_iseg_s {
 	pcb_qry_netseg_len_t *seg;
 	pcb_net_t *net;
 	unsigned shorted:1; /* set if the segment connects two different nets */
 	unsigned used:1;    /* already part of an output segment */
-} pcb_2netmap_iseg_t;
+	pcb_2netmap_iseg_t *next;
+};
 
 typedef union pcb_2netmap_obj_s {
 	pcb_arc_t arc;
@@ -46,17 +48,21 @@
 	pcb_line_t line;
 } pcb_2netmap_obj_t;
 
-typedef struct pcb_2netmap_oseg_s {
+typedef struct pcb_2netmap_oseg_s pcb_2netmap_oseg_t;
+struct pcb_2netmap_oseg_s {
 	vtp0_t *objs; /* of pcb_2netmap_obj_t ; these are not real board objects, they are just copies for the fields */
 	pcb_net_t *net;
 	unsigned shorted:1; /* set if the segment connects two different nets */
-} pcb_2netmap_oseg_t;
+	pcb_2netmap_oseg_t *next;
+};
 
 typedef struct pcb_2netmap_s {
 	pcb_2netmap_control_t ctrl;
-	htpp_t o2n;   /* of (pcb_2netmap_iseg_t *); tells the net for an object */
+	pcb_2netmap_iseg_t *osegs; /* output: head of a singly linked list */
 
 	/* internal */
+	htpp_t o2n;   /* of (pcb_2netmap_iseg_t *); tells the net for an object */
+	pcb_2netmap_iseg_t *isegs; /* head of a singly linked list */
 	pcb_qry_exec_t *ec;
 } pcb_2netmap_t;