Add pb_en/decode_nullterminated() (part of #278)

Nanopb has traditionally supported messages to be terminated with a zero tag.
However, this is not really standard protobuf behaviour, so it makes sense
to separate it into a different function. Because it is a breaking change,
it will happen in 0.4.0 release. But I add the functions here early so that
new code can start using them now.

Also changed the network_server example to use en/decode_delimited(), which
is the more common protobuf method of simple message framing.

1 files changed, 6 insertions, 0 deletions

diff --git a/pb_encode.h b/pb_encode.h
index d18a72d..8bf78dd 100644
--- a/pb_encode.h
+++ b/pb_encode.h
@@ -71,6 +71,12 @@ bool pb_encode(pb_ostream_t *stream, const pb_field_t fields[], const void *src_
  */
 bool pb_encode_delimited(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct);
 
+/* Same as pb_encode, but appends a null byte to the message for termination.
+ * NOTE: This behaviour is not supported in most other protobuf implementations, so pb_encode_delimited()
+ * is a better option for compatibility.
+ */
+bool pb_encode_nullterminated(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct);
+
 /* Encode the message to get the size of the encoded data, but do not store
  * the data. */
 bool pb_get_encoded_size(size_t *size, const pb_field_t fields[], const void *src_struct);