Method from_buffer

cpp/gdb_arrow.py:767–772

(cls, buf, offset, length)

    @classmethod
    def from_buffer(cls, buf, offset, length):
        assert isinstance(buf, Buffer)
        byte_offset, bit_offset = divmod(offset, 8)
        byte_length = math.ceil(length + offset / 8) - byte_offset
        return cls(buf.bytes_view(byte_offset, byte_length),
                   bit_offset, length)


class MappedView(Sequence):