Method null_bit_buffer

arrow-array/src/ffi.rs:557–565

returns the null bit buffer. Rust implementation uses a buffer that is not part of the array of buffers. The C Data interface's null buffer is part of the array of buffers.

(&self)

    /// Rust implementation uses a buffer that is not part of the array of buffers.
    /// The C Data interface's null buffer is part of the array of buffers.
    fn null_bit_buffer(&self) -> Option<Buffer> {
        // similar to `self.buffer_len(0)`, but without `Result`.
        // `ffi::ArrowArray` records array offset, we need to add it back to the
        // buffer length to get the actual buffer length.
        let length = self.array.len() + self.array.offset();
        let buffer_len = bit_util::ceil(length, 8);

        unsafe { create_buffer(self.owner.clone(), self.array, 0, buffer_len) }
    }

    fn dictionary(&self) -> Result<Option<ImportedArrowArray<'_>>> {
        match (self.array.dictionary(), &self.data_type) {