Read a given number of 32-bits unsigned integers from the given file
    with the given endianness.

def read_data(file, endian, num=1):
    """
    Read a given number of 32-bits unsigned integers from the given file
    with the given endianness.
    """
    res = struct.unpack(endian + 'L' * num, file.read(num * 4))
    if len(res) == 1:
        return res[0]
    return res