extended tags support

diff --git a/libasn1fix/asn1fix_tags.h b/libasn1fix/asn1fix_tags.h
index 429e56d..8dd622b 100644
--- a/libasn1fix/asn1fix_tags.h
+++ b/libasn1fix/asn1fix_tags.h
@@ -1,6 +1,29 @@
 #ifndef	_ASN1FIX_TAGS_H_
 #define	_ASN1FIX_TAGS_H_
 
-int asn1f_fetch_tag(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, struct asn1p_type_tag_s *tag, int special_ANY_handling);
+enum asn1f_aft_flags_e {
+	AFT_IMAGINARY_ANY	= 0x01,	/* Treat ANY tag as [IMAGINARY ANY] */
+	AFT_FETCH_OUTMOST	= 0x02,	/* Fetch only outmost tag */
+};
+
+
+/*
+ * Allocate and return an array of tags for the given type.
+ * Type1 ::= [2] EXPLICIT Type2
+ * Type2 ::= [3] IMPLICIT Type3
+ * Type3 ::= [4] EXPLICIT SEQUENCE { ... }
+ * Will return [2][3][UNIVERSAL 16] for the Type1.
+ */
+int asn1f_fetch_tags(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr,
+	struct asn1p_type_tag_s **tags, enum asn1f_aft_flags_e flags);
+
+/*
+ * Fetch the outmost tag of the given type.
+ * Type1 ::= Type2
+ * Type2 ::= [2] Type3
+ * Type3 ::= SEQUENCE { ... }
+ * Will yield [2] for Type1.
+ */
+int asn1f_fetch_outmost_tag(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, struct asn1p_type_tag_s *tag, int _aft_imaginary_any);
 
 #endif	/* _ASN1FIX_TAGS_H_ */