int ret;
struct blob_descriptor blob;
+ if (unlikely(buf_size == 0)) {
+ zero_reshdr(out_reshdr);
+ if (hash_ret)
+ copy_hash(hash_ret, zero_hash);
+ return 0;
+ }
+
blob_set_is_located_in_attached_buffer(&blob, (void *)buf, buf_size);
sha1_buffer(buf, buf_size, blob.hash);
blob.unhashed = 0;