Index: trunk/src/obj_common.c
===================================================================
--- trunk/src/obj_common.c	(revision 24456)
+++ trunk/src/obj_common.c	(revision 24457)
@@ -192,6 +192,25 @@
 	return NULL;
 }
 
+char *pcb_obj_id_fix(char *id)
+{
+	char *s;
+	if (id == NULL)
+		return NULL;
+
+	for(s = id; *s != '\0'; s++) {
+		if (isalnum(*s))
+			continue;
+		switch(*s) {
+			case '_': case '.': case '$': case ':': continue;
+			default: *s = '_';
+		}
+	}
+
+	return id;
+}
+
+
 pcb_flag_values_t pcb_obj_valid_flags(unsigned long int objtype)
 {
 	pcb_flag_values_t res = 0;
Index: trunk/src/obj_common.h
===================================================================
--- trunk/src/obj_common.h	(revision 24456)
+++ trunk/src/obj_common.h	(revision 24457)
@@ -222,6 +222,9 @@
 /* Returns the first invalid character of an ID (terminal, refdes) or NULL */
 const char *pcb_obj_id_invalid(const char *id);
 
+/* Fix an ID in place (replace anything invalid with '_'); returns id */
+char *pcb_obj_id_fix(char *id);
+
 #define pcb_obj_id_reg(data, obj) \
 	do { \
 		pcb_any_obj_t *__obj__ = (pcb_any_obj_t *)(obj); \