diff --git a/tests/42-real-life-OK.asn1.-PR b/tests/42-real-life-OK.asn1.-PR
index d0325fb..304eac2 100644
--- a/tests/42-real-life-OK.asn1.-PR
+++ b/tests/42-real-life-OK.asn1.-PR
@@ -649,7 +649,7 @@
 
 static asn_dec_rval_t
 accept_as_2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	accept_as_2_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -664,7 +664,7 @@
 
 static asn_dec_rval_t
 accept_as_2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	accept_as_2_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
diff --git a/tests/46-redefine-OK.asn1.-PR b/tests/46-redefine-OK.asn1.-PR
index 9f70125..d920904 100644
--- a/tests/46-redefine-OK.asn1.-PR
+++ b/tests/46-redefine-OK.asn1.-PR
@@ -61,7 +61,7 @@
 
 asn_dec_rval_t
 PrimitiveType_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	PrimitiveType_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -76,7 +76,7 @@
 
 asn_dec_rval_t
 PrimitiveType_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	PrimitiveType_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -245,7 +245,7 @@
 
 asn_dec_rval_t
 T_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -260,7 +260,7 @@
 
 asn_dec_rval_t
 T_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
diff --git a/tests/50-constraint-OK.asn1.-P b/tests/50-constraint-OK.asn1.-P
index d258297..a3724de 100644
--- a/tests/50-constraint-OK.asn1.-P
+++ b/tests/50-constraint-OK.asn1.-P
@@ -61,7 +61,7 @@
 
 asn_dec_rval_t
 Int1_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Int1_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -76,7 +76,7 @@
 
 asn_dec_rval_t
 Int1_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Int1_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -198,7 +198,7 @@
 
 asn_dec_rval_t
 Int2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Int2_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -213,7 +213,7 @@
 
 asn_dec_rval_t
 Int2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Int2_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -339,7 +339,7 @@
 
 asn_dec_rval_t
 Int3_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Int3_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -354,7 +354,7 @@
 
 asn_dec_rval_t
 Int3_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Int3_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -480,7 +480,7 @@
 
 asn_dec_rval_t
 Int4_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Int4_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -495,7 +495,7 @@
 
 asn_dec_rval_t
 Int4_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Int4_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -621,7 +621,7 @@
 
 asn_dec_rval_t
 Int5_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Int5_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -636,7 +636,7 @@
 
 asn_dec_rval_t
 Int5_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Int5_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -762,7 +762,7 @@
 
 asn_dec_rval_t
 ExtensibleExtensions_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	ExtensibleExtensions_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -777,7 +777,7 @@
 
 asn_dec_rval_t
 ExtensibleExtensions_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	ExtensibleExtensions_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -880,7 +880,7 @@
 
 asn_dec_rval_t
 Str1_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Str1_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -895,7 +895,7 @@
 
 asn_dec_rval_t
 Str1_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Str1_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -1033,7 +1033,7 @@
 
 asn_dec_rval_t
 Str2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Str2_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -1048,7 +1048,7 @@
 
 asn_dec_rval_t
 Str2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Str2_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -1197,7 +1197,7 @@
 
 asn_dec_rval_t
 Str3_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Str3_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -1212,7 +1212,7 @@
 
 asn_dec_rval_t
 Str3_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Str3_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -1347,7 +1347,7 @@
 
 asn_dec_rval_t
 Str4_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Str4_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -1362,7 +1362,7 @@
 
 asn_dec_rval_t
 Str4_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Str4_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -1497,7 +1497,7 @@
 
 asn_dec_rval_t
 PER_Visible_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	PER_Visible_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -1512,7 +1512,7 @@
 
 asn_dec_rval_t
 PER_Visible_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	PER_Visible_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -1647,7 +1647,7 @@
 
 asn_dec_rval_t
 PER_Visible_2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	PER_Visible_2_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -1662,7 +1662,7 @@
 
 asn_dec_rval_t
 PER_Visible_2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	PER_Visible_2_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -1797,7 +1797,7 @@
 
 asn_dec_rval_t
 Not_PER_Visible_1_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Not_PER_Visible_1_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -1812,7 +1812,7 @@
 
 asn_dec_rval_t
 Not_PER_Visible_1_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Not_PER_Visible_1_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -1947,7 +1947,7 @@
 
 asn_dec_rval_t
 Not_PER_Visible_2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Not_PER_Visible_2_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -1962,7 +1962,7 @@
 
 asn_dec_rval_t
 Not_PER_Visible_2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Not_PER_Visible_2_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -2097,7 +2097,7 @@
 
 asn_dec_rval_t
 Not_PER_Visible_3_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Not_PER_Visible_3_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -2112,7 +2112,7 @@
 
 asn_dec_rval_t
 Not_PER_Visible_3_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Not_PER_Visible_3_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -2250,7 +2250,7 @@
 
 asn_dec_rval_t
 SIZE_but_not_FROM_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	SIZE_but_not_FROM_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -2265,7 +2265,7 @@
 
 asn_dec_rval_t
 SIZE_but_not_FROM_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	SIZE_but_not_FROM_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -2403,7 +2403,7 @@
 
 asn_dec_rval_t
 SIZE_and_FROM_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	SIZE_and_FROM_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -2418,7 +2418,7 @@
 
 asn_dec_rval_t
 SIZE_and_FROM_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	SIZE_and_FROM_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -2553,7 +2553,7 @@
 
 asn_dec_rval_t
 Neither_SIZE_nor_FROM_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Neither_SIZE_nor_FROM_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -2568,7 +2568,7 @@
 
 asn_dec_rval_t
 Neither_SIZE_nor_FROM_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Neither_SIZE_nor_FROM_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -2697,7 +2697,7 @@
 
 asn_dec_rval_t
 Utf8_4_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Utf8_4_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -2712,7 +2712,7 @@
 
 asn_dec_rval_t
 Utf8_4_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Utf8_4_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -2869,7 +2869,7 @@
 
 asn_dec_rval_t
 Utf8_3_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Utf8_3_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -2884,7 +2884,7 @@
 
 asn_dec_rval_t
 Utf8_3_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Utf8_3_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -3011,7 +3011,7 @@
 
 asn_dec_rval_t
 Utf8_2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Utf8_2_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -3026,7 +3026,7 @@
 
 asn_dec_rval_t
 Utf8_2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Utf8_2_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -3129,7 +3129,7 @@
 
 asn_dec_rval_t
 Utf8_1_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Utf8_1_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -3144,7 +3144,7 @@
 
 asn_dec_rval_t
 Utf8_1_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Utf8_1_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -3294,7 +3294,7 @@
 
 asn_dec_rval_t
 VisibleIdentifier_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	VisibleIdentifier_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -3309,7 +3309,7 @@
 
 asn_dec_rval_t
 VisibleIdentifier_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	VisibleIdentifier_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -3459,7 +3459,7 @@
 
 asn_dec_rval_t
 Identifier_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Identifier_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -3474,7 +3474,7 @@
 
 asn_dec_rval_t
 Identifier_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Identifier_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
diff --git a/tests/65-multi-tag-OK.asn1.-P b/tests/65-multi-tag-OK.asn1.-P
index 1433844..a1062bb 100644
--- a/tests/65-multi-tag-OK.asn1.-P
+++ b/tests/65-multi-tag-OK.asn1.-P
@@ -61,7 +61,7 @@
 
 asn_dec_rval_t
 T1_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T1_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -76,7 +76,7 @@
 
 asn_dec_rval_t
 T1_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T1_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -190,7 +190,7 @@
 
 asn_dec_rval_t
 T2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T2_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -205,7 +205,7 @@
 
 asn_dec_rval_t
 T2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T2_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -317,7 +317,7 @@
 
 asn_dec_rval_t
 T3_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T3_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -332,7 +332,7 @@
 
 asn_dec_rval_t
 T3_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T3_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -442,7 +442,7 @@
 
 asn_dec_rval_t
 T4_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T4_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -457,7 +457,7 @@
 
 asn_dec_rval_t
 T4_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T4_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -562,7 +562,7 @@
 
 asn_dec_rval_t
 T5_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T5_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -577,7 +577,7 @@
 
 asn_dec_rval_t
 T5_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T5_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -681,7 +681,7 @@
 
 asn_dec_rval_t
 T6_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T6_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -696,7 +696,7 @@
 
 asn_dec_rval_t
 T6_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T6_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -799,7 +799,7 @@
 
 asn_dec_rval_t
 T_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -814,7 +814,7 @@
 
 asn_dec_rval_t
 T_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
diff --git a/tests/65-multi-tag-OK.asn1.-Pfnative-types b/tests/65-multi-tag-OK.asn1.-Pfnative-types
index 64c95f3..14e1098 100644
--- a/tests/65-multi-tag-OK.asn1.-Pfnative-types
+++ b/tests/65-multi-tag-OK.asn1.-Pfnative-types
@@ -61,7 +61,7 @@
 
 asn_dec_rval_t
 T1_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T1_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -76,7 +76,7 @@
 
 asn_dec_rval_t
 T1_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T1_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -190,7 +190,7 @@
 
 asn_dec_rval_t
 T2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T2_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -205,7 +205,7 @@
 
 asn_dec_rval_t
 T2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T2_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -317,7 +317,7 @@
 
 asn_dec_rval_t
 T3_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T3_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -332,7 +332,7 @@
 
 asn_dec_rval_t
 T3_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T3_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -442,7 +442,7 @@
 
 asn_dec_rval_t
 T4_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T4_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -457,7 +457,7 @@
 
 asn_dec_rval_t
 T4_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T4_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -562,7 +562,7 @@
 
 asn_dec_rval_t
 T5_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T5_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -577,7 +577,7 @@
 
 asn_dec_rval_t
 T5_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T5_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -681,7 +681,7 @@
 
 asn_dec_rval_t
 T6_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T6_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -696,7 +696,7 @@
 
 asn_dec_rval_t
 T6_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T6_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -799,7 +799,7 @@
 
 asn_dec_rval_t
 T_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	T_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -814,7 +814,7 @@
 
 asn_dec_rval_t
 T_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	T_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
diff --git a/tests/66-ref-simple-OK.asn1.-P b/tests/66-ref-simple-OK.asn1.-P
index 305d724..0259fc0 100644
--- a/tests/66-ref-simple-OK.asn1.-P
+++ b/tests/66-ref-simple-OK.asn1.-P
@@ -130,7 +130,7 @@
 
 asn_dec_rval_t
 SimpleType_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	SimpleType_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -145,7 +145,7 @@
 
 asn_dec_rval_t
 SimpleType_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	SimpleType_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
diff --git a/tests/70-xer-test-OK.asn1.-P b/tests/70-xer-test-OK.asn1.-P
index 913917a..0b1bbb3 100644
--- a/tests/70-xer-test-OK.asn1.-P
+++ b/tests/70-xer-test-OK.asn1.-P
@@ -451,7 +451,7 @@
 
 static asn_dec_rval_t
 enum_4_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	enum_4_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -466,7 +466,7 @@
 
 static asn_dec_rval_t
 enum_4_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	enum_4_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -855,7 +855,7 @@
 
 static asn_dec_rval_t
 Member_2_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	Member_2_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -870,7 +870,7 @@
 
 static asn_dec_rval_t
 Member_2_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	Member_2_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
diff --git a/tests/73-circular-OK.asn1.-P b/tests/73-circular-OK.asn1.-P
index a7d7667..49b3fcf 100644
--- a/tests/73-circular-OK.asn1.-P
+++ b/tests/73-circular-OK.asn1.-P
@@ -181,7 +181,7 @@
 
 asn_dec_rval_t
 EpytRef_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	EpytRef_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -196,7 +196,7 @@
 
 asn_dec_rval_t
 EpytRef_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	EpytRef_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }
@@ -702,7 +702,7 @@
 
 asn_dec_rval_t
 EnumType_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, void *bufptr, size_t size, int tag_mode) {
+		void **structure, const void *bufptr, size_t size, int tag_mode) {
 	EnumType_1_inherit_TYPE_descriptor(td);
 	return td->ber_decoder(opt_codec_ctx, td, structure, bufptr, size, tag_mode);
 }
@@ -717,7 +717,7 @@
 
 asn_dec_rval_t
 EnumType_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
-		void **structure, const char *opt_mname, void *bufptr, size_t size) {
+		void **structure, const char *opt_mname, const void *bufptr, size_t size) {
 	EnumType_1_inherit_TYPE_descriptor(td);
 	return td->xer_decoder(opt_codec_ctx, td, structure, opt_mname, bufptr, size);
 }