Function load_subtree

notes.c:397–502

}

static void load_subtree(struct notes_tree *t, struct leaf_node *subtree,
		struct int_node *node, unsigned int n)
{
	struct object_id object_oid;
	size_t prefix_len;
	void *buf;
	struct tree_desc desc;
	struct name_entry entry;
	const unsigned hashsz = the_hash_algo->rawsz;

	buf = fill_tree_descriptor(the_repository, &desc, &subtree->val_oid);
	if (!buf)
		die("Could not read %s for notes-index",
		     oid_to_hex(&subtree->val_oid));

	prefix_len = subtree->key_oid.hash[KEY_INDEX];
	if (prefix_len >= hashsz)
		BUG("prefix_len (%"PRIuMAX") is out of range", (uintmax_t)prefix_len);
	if (prefix_len * 2 < n)
		BUG("prefix_len (%"PRIuMAX") is too small", (uintmax_t)prefix_len);
	memcpy(object_oid.hash, subtree->key_oid.hash, prefix_len);
	while (tree_entry(&desc, &entry)) {
		unsigned char type;
		struct leaf_node *l;
		size_t path_len = strlen(entry.path);

		if (path_len == 2 * (hashsz - prefix_len)) {
			/* This is potentially the remainder of the SHA-1 */

			if (!S_ISREG(entry.mode))
				/* notes must be blobs */
				goto handle_non_note;

			if (hex_to_bytes(object_oid.hash + prefix_len, entry.path,
					 hashsz - prefix_len))
				goto handle_non_note; /* entry.path is not a SHA1 */

			memset(object_oid.hash + hashsz, 0, GIT_MAX_RAWSZ - hashsz);

			type = PTR_TYPE_NOTE;
		} else if (path_len == 2) {
			/* This is potentially an internal node */
			size_t len = prefix_len;

			if (!S_ISDIR(entry.mode))
				/* internal nodes must be trees */
				goto handle_non_note;

			if (hex_to_bytes(object_oid.hash + len++, entry.path, 1))
				goto handle_non_note; /* entry.path is not a SHA1 */

			/*
			 * Pad the rest of the SHA-1 with zeros,
			 * except for the last byte, where we write
			 * the length:
			 */
			memset(object_oid.hash + len, 0, hashsz - len - 1);
			object_oid.hash[KEY_INDEX] = (unsigned char)len;