def sortedFs(nca):
    fs = [i for i in nca.sections]
    fs.sort(key=lambda x: x.offset)
    return fs


def isNcaPacked(nca):
    fs = sortedFs(nca)
    if len(fs) == 0:
        return True
    next = fs[0].offset

    for i in range(len(fs)):
        if fs[i].offset != next:
            return False
        next = fs[i].offset + fs[i].size

    if next != nca.size:
        return False
    return True