Index: trunk/src/global_typedefs.h
===================================================================
--- trunk/src/global_typedefs.h	(revision 32884)
+++ trunk/src/global_typedefs.h	(revision 32885)
@@ -49,6 +49,7 @@
 
 typedef struct pcb_poly_s pcb_poly_t;
 typedef struct pcb_pstk_s pcb_pstk_t;
+typedef struct pcb_pstk_proto_s pcb_pstk_proto_t;
 
 typedef struct pcb_ratspatch_line_s pcb_ratspatch_line_t;
 typedef struct pcb_subc_s pcb_subc_t;
Index: trunk/src/obj_pstk.h
===================================================================
--- trunk/src/obj_pstk.h	(revision 32884)
+++ trunk/src/obj_pstk.h	(revision 32885)
@@ -63,7 +63,7 @@
 #include "obj_pstk_shape.h"
 #include "vtpadstack_t.h"
 
-typedef struct pcb_pstk_proto_s {
+struct pcb_pstk_proto_s {
 	unsigned in_use:1;             /* 1 if the slot is in use */
 
 	unsigned hplated:1;            /* if > 0, whether the hole is plated */
@@ -78,7 +78,7 @@
 	pcb_data_t *parent;
 	int mech_idx;                  /* -1 or index to the first shape[] that is of PCB_LYT_MECH */
 	unsigned all_copper_connd:1;   /* 1 if all copper shapes are connected by the hole/slot (regardless of plating!) */
-} pcb_pstk_proto_t;
+};
 
 /* Whether a proto cuts through board layers (has a hole or slot) */
 #define PCB_PSTK_PROTO_CUTS(proto) (((proto)->hdia > 0) || ((proto)->mech_idx >= 0))
Index: trunk/src/plug_io.h
===================================================================
--- trunk/src/plug_io.h	(revision 32884)
+++ trunk/src/plug_io.h	(revision 32885)
@@ -39,7 +39,8 @@
 	PCB_IOT_PCB        = 1,
 	PCB_IOT_FOOTPRINT  = 2,
 	PCB_IOT_FONT       = 4,
-	PCB_IOT_BUFFER     = 8
+	PCB_IOT_BUFFER     = 8,
+	PCB_IOT_PADSTACK   = 16
 } pcb_plug_iot_t;
 
 /* Returned by map_footprint() to tell what type of footprint(s) a file contains */
@@ -97,7 +98,13 @@
 	/* Attempt to load a complete buffer from a file. Return 0 on success. */
 	int (*parse_buffer)(pcb_plug_io_t *ctx, pcb_buffer_t *buff, const char *filename);
 
+	/* Attempt to load padstack prototype */
+	int (*parse_padstack)(pcb_plug_io_t *ctx, pcb_pstk_proto_t *dst, const char *filename);
 
+
+	/* Write a padstack prototype to a file. Return 0 on success. */
+	int (*write_padstack)(pcb_plug_io_t *ctx, FILE *f, pcb_pstk_proto_t *dst);
+
 	/* Write the buffer to a file. Return 0 on success. */
 	int (*write_buffer)(pcb_plug_io_t *ctx, FILE *f, pcb_buffer_t *buff);