Function get_offsets_from_buffer

arrow-array/src/array/mod.rs:1030–1043

Helper function that creates an [`OffsetBuffer`] from a buffer and array offset/ length # Safety - buffer must contain valid arrow offsets ( [`OffsetBuffer`] ) for the given length and offset.

(
    buffer: Buffer,
    offset: usize,
    len: usize,
)

/// - buffer must contain valid arrow offsets ( [`OffsetBuffer`] ) for the
///   given length and offset.
unsafe fn get_offsets_from_buffer<O: ArrowNativeType>(
    buffer: Buffer,
    offset: usize,
    len: usize,
) -> OffsetBuffer<O> {
    if len == 0 && buffer.is_empty() {
        return OffsetBuffer::new_empty();
    }

    let scalar_buffer = ScalarBuffer::new(buffer, offset, len + 1);
    // Safety:
    // Arguments were valid
    unsafe { OffsetBuffer::new_unchecked(scalar_buffer) }
}

/// Helper function for printing potentially long arrays.
fn print_long_array<A, F>(array: &A, f: &mut std::fmt::Formatter, print_item: F) -> std::fmt::Result