X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/20d4dd0571e75d254444acf755a01b48a691c7c2..4271ab433cd55bbd2612292bcf39e4dc3d7274f1:/libs/smux/include/stg/per_encoder.h

diff --git a/libs/smux/include/stg/per_encoder.h b/libs/smux/include/stg/per_encoder.h
index 9ac130b7..95a6506e 100644
--- a/libs/smux/include/stg/per_encoder.h
+++ b/libs/smux/include/stg/per_encoder.h
@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2006 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Copyright (c) 2006, 2007 Lev Walkin <vlm@lionet.info>. All rights reserved.
  * Redistribution and modifications are permitted subject to BSD license.
  */
 #ifndef	_PER_ENCODER_H_
@@ -16,6 +16,9 @@ struct asn_TYPE_descriptor_s;	/* Forward declaration */
 
 /*
  * Unaligned PER encoder of any ASN.1 type. May be invoked by the application.
+ * WARNING: This function returns the number of encoded bits in the .encoded
+ * field of the return value. Use the following formula to convert to bytes:
+ * 	bytes = ((.encoded + 7) / 8)
  */
 asn_enc_rval_t uper_encode(struct asn_TYPE_descriptor_s *type_descriptor,
 	void *struct_ptr,	/* Structure to be encoded */
@@ -23,7 +26,11 @@ asn_enc_rval_t uper_encode(struct asn_TYPE_descriptor_s *type_descriptor,
 	void *app_key		/* Arbitrary callback argument */
 );
 
-/* A variant of uper_encode() which encodes data into the existing buffer */
+/*
+ * A variant of uper_encode() which encodes data into the existing buffer
+ * WARNING: This function returns the number of encoded bits in the .encoded
+ * field of the return value.
+ */
 asn_enc_rval_t uper_encode_to_buffer(
 	struct asn_TYPE_descriptor_s *type_descriptor,
 	void *struct_ptr,	/* Structure to be encoded */
@@ -31,6 +38,19 @@ asn_enc_rval_t uper_encode_to_buffer(
 	size_t buffer_size	/* Initial buffer size (max) */
 );
 
+/*
+ * A variant of uper_encode_to_buffer() which allocates buffer itself.
+ * Returns the number of bytes in the buffer or -1 in case of failure.
+ * WARNING: This function produces a "Production of the complete encoding",
+ * with length of at least one octet. Contrast this to precise bit-packing
+ * encoding of uper_encode() and uper_encode_to_buffer().
+ */
+ssize_t uper_encode_to_new_buffer(
+	struct asn_TYPE_descriptor_s *type_descriptor,
+	asn_per_constraints_t *constraints,
+	void *struct_ptr,	/* Structure to be encoded */
+	void **buffer_r		/* Buffer allocated and returned */
+);
 
 /*
  * Type of the generic PER encoder function.