bool pb_field_iter_find(pb_field_iter_t *iter, uint32_t tag)
{
const pb_field_t *start = iter->pos;
do {
if (iter->pos->tag == tag &&
PB_LTYPE(iter->pos->type) != PB_LTYPE_EXTENSION)
{
/* Found the wanted field */
return true;
}
(void)pb_field_iter_next(iter);
} while (iter->pos != start);
/* Searched all the way back to start, and found nothing. */
return false;
}
/* This function is the core of the union encoding process. It handles
* the top-level pb_field_t array manually, in order to encode a correct
* field tag before the message. The pointer to MsgType_fields array is
* used as an unique identifier for the message type.
*/
bool encode_unionmessage(pb_ostream_t *stream, const pb_msgdesc_t *messagetype, void *message)
{
pb_field_iter_t iter;
if (!pb_field_iter_begin(&iter, UnionMessage_fields, message))
return false;
do
{
if (iter.submsg_desc == messagetype)
{
/* This is our field, encode the message using it. */
if (!pb_encode_tag_for_field(stream, &iter))
return false;
return pb_encode_submessage(stream, messagetype, message);
}
} while (pb_field_iter_next(&iter));
/* Didn't find the field for messagetype */
return false;
}
bool checkreturn pb_encode(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
{
pb_field_iter_t iter;
if (!pb_field_iter_begin(&iter, fields, remove_const(src_struct)))
return true; /* Empty message type */
do {
if (PB_LTYPE(iter.pos->type) == PB_LTYPE_EXTENSION)
{
/* Special case for the extension field placeholder */
if (!encode_extension_field(stream, iter.pos, iter.pData))
return false;
}
else
{
/* Regular field */
if (!encode_field(stream, iter.pos, iter.pData))
return false;
}
} while (pb_field_iter_next(&iter));
return true;
}
