resfileloader.py 文件源码

def load_custom(self, callback, offset: int = None):
        """
        Reads and returns an instance of arbitrary type from the following offset with the given callback or returns
        None if the read offset is 0.
        :param callback: The callback to read the instance data with.
        :param offset: The optional offset to use instead of reading a following one.
        :return: The data instance or None.
        """
        offset = offset or self.read_offset()
        if not offset:
            return None
        with self.temporary_seek(offset, io.SEEK_SET):
            return callback(self)