pb_decode: performance optimizations for extension field handling

1 files changed, 4 insertions, 0 deletions

diff --git a/pb_common.h b/pb_common.h
index 47fa2c9..58aa90f 100644
--- a/pb_common.h
+++ b/pb_common.h
@@ -32,6 +32,10 @@ bool pb_field_iter_next(pb_field_iter_t *iter);
  * Returns false if no such field exists. */
 bool pb_field_iter_find(pb_field_iter_t *iter, uint32_t tag);
 
+/* Find a field with type PB_LTYPE_EXTENSION, or return false if not found.
+ * There can be only one extension range field per message. */
+bool pb_field_iter_find_extension(pb_field_iter_t *iter);
+
 #ifdef PB_VALIDATE_UTF8
 /* Validate UTF-8 text string */
 bool pb_validate_utf8(const char *s);