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-rw-r--r--pb_decode.c22
1 files changed, 10 insertions, 12 deletions
diff --git a/pb_decode.c b/pb_decode.c
index 40da1aa4..3e817cc8 100644
--- a/pb_decode.c
+++ b/pb_decode.c
@@ -616,7 +616,7 @@ static bool checkreturn default_extension_decoder(pb_istream_t *stream,
/* Fake a field iterator for the extension field.
* It is not actually safe to advance this iterator, but decode_field
* will not even try to. */
- pb_field_iter_begin(&iter, field, extension->dest);
+ (void)pb_field_iter_begin(&iter, field, extension->dest);
iter.pData = extension->dest;
iter.pSize = &extension->found;
@@ -668,16 +668,14 @@ static bool checkreturn find_extension_field(pb_field_iter_t *iter)
static void pb_message_set_to_defaults(const pb_field_t fields[], void *dest_struct)
{
pb_field_iter_t iter;
- pb_field_iter_begin(&iter, fields, dest_struct);
+
+ if (!pb_field_iter_begin(&iter, fields, dest_struct))
+ return; /* Empty message type */
do
{
pb_type_t type;
type = iter.pos->type;
-
- /* Avoid crash on empty message types (zero fields) */
- if (iter.pos->tag == 0)
- continue;
if (PB_ATYPE(type) == PB_ATYPE_STATIC)
{
@@ -738,7 +736,9 @@ bool checkreturn pb_decode_noinit(pb_istream_t *stream, const pb_field_t fields[
uint32_t extension_range_start = 0;
pb_field_iter_t iter;
- pb_field_iter_begin(&iter, fields, dest_struct);
+ /* Return value ignored, as empty message types will be correctly handled by
+ * pb_field_iter_find() anyway. */
+ (void)pb_field_iter_begin(&iter, fields, dest_struct);
while (stream->bytes_left)
{
@@ -859,17 +859,15 @@ bool pb_decode_delimited(pb_istream_t *stream, const pb_field_t fields[], void *
void pb_release(const pb_field_t fields[], void *dest_struct)
{
pb_field_iter_t iter;
- pb_field_iter_begin(&iter, fields, dest_struct);
+
+ if (!pb_field_iter_begin(&iter, fields, dest_struct))
+ return; /* Empty message type */
do
{
pb_type_t type;
type = iter.pos->type;
- /* Avoid crash on empty message types (zero fields) */
- if (iter.pos->tag == 0)
- continue;
-
if (PB_ATYPE(type) == PB_ATYPE_POINTER)
{
if (PB_HTYPE(type) == PB_HTYPE_REPEATED &&