Method from_unsliced_buffer

arrow-buffer/src/buffer/null.rs:245–249

Create a [`NullBuffer`] from an *unsliced* validity bitmap (`offset = 0` **bits**) of length `len`. Returns `None` if there are no nulls (all values valid).

(buffer: impl Into<Buffer>, len: usize)

    ///
    /// Returns `None` if there are no nulls (all values valid).
    pub fn from_unsliced_buffer(buffer: impl Into<Buffer>, len: usize) -> Option<Self> {
        let bb = BooleanBuffer::new(buffer.into(), 0, len);
        let nb = NullBuffer::new(bb);
        (nb.null_count() > 0).then_some(nb)
    }

    /// Claim memory used by this null buffer in the provided memory pool.
    #[cfg(feature = "pool")]