static int parse_file_extra_version(struct archive_read* a,
    struct archive_entry* e, ssize_t* extra_data_size)
{
	size_t flags = 0;
	size_t version = 0;
	size_t value_len = 0;
	struct archive_string version_string;
	struct archive_string name_utf8_string;
	const char* cur_filename;

	/* Flags are ignored. */
	if(!read_var_sized(a, &flags, &value_len))
		return ARCHIVE_EOF;

	*extra_data_size -= value_len;
	if(ARCHIVE_OK != consume(a, value_len))
		return ARCHIVE_EOF;

	if(!read_var_sized(a, &version, &value_len))
		return ARCHIVE_EOF;

	*extra_data_size -= value_len;
	if(ARCHIVE_OK != consume(a, value_len))
		return ARCHIVE_EOF;

	/* extra_data_size should be zero here. */

	cur_filename = archive_entry_pathname_utf8(e);
	if(cur_filename == NULL) {
		archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER,
		    "Version entry without file name");
		return ARCHIVE_FATAL;
	}

	archive_string_init(&version_string);
	archive_string_init(&name_utf8_string);

	/* Prepare a ;123 suffix for the filename, where '123' is the version
	 * value of this file. */
	archive_string_sprintf(&version_string, ";%zu", version);

	/* Build the new filename. */
	archive_strcat(&name_utf8_string, cur_filename);
	archive_strcat(&name_utf8_string, version_string.s);

	/* Apply the new filename into this file's context. */
	archive_entry_update_pathname_utf8(e, name_utf8_string.s);

	/* Free buffers. */
	archive_string_free(&version_string);
	archive_string_free(&name_utf8_string);
	return ARCHIVE_OK;
}