zzip_disk_entry_to_data(ZZIP_DISK * disk, struct zzip_disk_entry * entry)
{
    struct zzip_file_header *file = zzip_disk_entry_to_file_header(disk, entry);
    if (! file)
        return 0; /* EBADMSG */
    return zzip_file_header_to_data(file);
}
zzip_disk_entry_to_data(ZZIP_DISK * disk, struct zzip_disk_entry * entry)
{
    struct zzip_file_header *file = zzip_disk_entry_to_file_header(disk, entry);
    if (! file)
        return 0;  
    return zzip_file_header_to_data(file);
}