Index: trunk/src_plugins/query/fnc.c
===================================================================
--- trunk/src_plugins/query/fnc.c	(revision 35641)
+++ trunk/src_plugins/query/fnc.c	(revision 35642)
@@ -168,6 +168,7 @@
 	pcb_qry_fnc_reg("netlen", fnc_netlen);
 	pcb_qry_fnc_reg("obj_by_idpath", fnc_obj_by_idpath);
 	pcb_qry_fnc_reg("poly_is_valid", fnc_poly_is_valid);
+	pcb_qry_fnc_reg("text_invalid_chars", fnc_text_invalid_chars);
 
 	pcb_qry_fnc_reg("thermal_on", fnc_thermal_on);
 
Index: trunk/src_plugins/query/fnc_glue.c
===================================================================
--- trunk/src_plugins/query/fnc_glue.c	(revision 35641)
+++ trunk/src_plugins/query/fnc_glue.c	(revision 35642)
@@ -339,4 +339,18 @@
 		return -1;
 
 	PCB_QRY_RET_INT(res, !!pcb_poly_is_valid((pcb_poly_t *)obj));
-}
\ No newline at end of file
+}
+
+static int fnc_text_invalid_chars(pcb_qry_exec_t *ectx, int argc, pcb_qry_val_t *argv, pcb_qry_val_t *res)
+{
+	pcb_any_obj_t *obj;
+
+	if ((argc != 1) || (argv[0].type != PCBQ_VT_OBJ))
+		return -1;
+
+	obj = argv[0].data.obj;
+	if (obj->type != PCB_OBJ_TEXT)
+		return -1;
+
+	PCB_QRY_RET_INT(res, pcb_text_invalid_chars(ectx->pcb, NULL, ((pcb_text_t *)obj)));
+}