Function read_untracked_extension

dir.c:3866–3957

}

struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
{
	struct untracked_cache *uc;
	struct read_data rd;
	const unsigned char *next = data, *end = (const unsigned char *)data + sz;
	const char *ident;
	uint64_t ident_len;
	uint64_t varint_len;
	ssize_t len;
	const char *exclude_per_dir;
	const unsigned hashsz = the_hash_algo->rawsz;
	const unsigned offset = sizeof(struct ondisk_untracked_cache);
	const unsigned exclude_per_dir_offset = offset + 2 * hashsz;

	if (sz <= 1 || end[-1] != '\0')
		return NULL;
	end--;

	ident_len = decode_varint(&next);
	if (next + ident_len > end)
		return NULL;
	ident = (const char *)next;
	next += ident_len;

	if (next + exclude_per_dir_offset + 1 > end)
		return NULL;

	CALLOC_ARRAY(uc, 1);
	strbuf_init(&uc->ident, ident_len);
	strbuf_add(&uc->ident, ident, ident_len);
	load_oid_stat(&uc->ss_info_exclude,
		      next + ouc_offset(info_exclude_stat),
		      next + offset);
	load_oid_stat(&uc->ss_excludes_file,
		      next + ouc_offset(excludes_file_stat),
		      next + offset + hashsz);
	uc->dir_flags = get_be32(next + ouc_offset(dir_flags));
	exclude_per_dir = (const char *)next + exclude_per_dir_offset;
	uc->exclude_per_dir = uc->exclude_per_dir_to_free = xstrdup(exclude_per_dir);
	/* NUL after exclude_per_dir is covered by sizeof(*ouc) */
	next += exclude_per_dir_offset + strlen(exclude_per_dir) + 1;
	if (next >= end)
		goto done2;

	varint_len = decode_varint(&next);
	if (next > end || varint_len == 0)
		goto done2;

	rd.valid      = ewah_new();
	rd.check_only = ewah_new();
	rd.sha1_valid = ewah_new();
	rd.data	      = next;
	rd.end	      = end;
	rd.index      = 0;
	ALLOC_ARRAY(rd.ucd, varint_len);

	if (read_one_dir(&uc->root, &rd) || rd.index != varint_len)
		goto done;