Index: data.h
===================================================================
--- data.h	(revision 13492)
+++ data.h	(revision 13493)
@@ -102,6 +102,9 @@
 typedef void (*pcb_epin_cb_t)(void *ctx, pcb_board_t *pcb, pcb_element_t *element, pcb_pin_t *pin);
 typedef void (*pcb_epad_cb_t)(void *ctx, pcb_board_t *pcb, pcb_element_t *element, pcb_pad_t *pad);
 
+/* subc callbacks */
+typedef int (*pcb_subc_cb_t)(void *ctx, pcb_board_t *pcb, pcb_subc_t *subc, int enter);
+
 /* via and padstack callbacks */
 typedef void (*pcb_via_cb_t)(void *ctx, pcb_board_t *pcb, pcb_pin_t *via);
 typedef void (*pcb_pstk_cb_t)(void *ctx, pcb_board_t *pcb, pcb_pstk_t *ps);
@@ -112,6 +115,9 @@
 /* Loop over all elements and element primitives. Element is the outer loop. */
 void pcb_loop_elements(pcb_board_t *pcb, void *ctx, pcb_element_cb_t ecb, pcb_eline_cb_t elcb, pcb_earc_cb_t eacb, pcb_etext_cb_t etcb, pcb_epin_cb_t epicb, pcb_epad_cb_t epacb);
 
+/* Loop over all subcircuits. */
+void pcb_loop_subc(pcb_board_t *pcb, void *ctx, pcb_subc_cb_t scb);
+
 /* Loop over all vias. */
 void pcb_loop_vias(pcb_board_t *pcb, void *ctx, pcb_via_cb_t vcb);
 
@@ -119,6 +125,7 @@
 void pcb_loop_all(pcb_board_t *pcb, void *ctx,
 	pcb_layer_cb_t lacb, pcb_line_cb_t lcb, pcb_arc_cb_t acb, pcb_text_cb_t tcb, pcb_poly_cb_t pocb,
 	pcb_element_cb_t ecb, pcb_eline_cb_t elcb, pcb_earc_cb_t eacb, pcb_etext_cb_t etcb, pcb_epin_cb_t epicb, pcb_epad_cb_t epacb,
+	pcb_subc_cb_t scb,
 	pcb_via_cb_t vcb, pcb_pstk_cb_t pscb
 );