+ desc.buf = tree->buffer;
+ desc.size = tree->size;
+ while (desc.size) {
+ unsigned mode;
+ const char *name;
+ const unsigned char *sha1;
+
+ sha1 = tree_entry_extract(&desc, &name, &mode);
+ update_tree_entry(&desc);
+
+ if (S_ISDIR(mode)) {
+ struct tree *tree = lookup_tree(sha1);
+ process_tree(tree);
+ } else {
+ struct blob *blob = lookup_blob(sha1);
+ process(&blob->object);
+ }