Skip to main content

vortex_array/arrays/bool/compute/
slice.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use std::ops::Range;
5
6use vortex_error::VortexResult;
7
8use crate::ArrayRef;
9use crate::IntoArray;
10use crate::array::ArrayView;
11use crate::arrays::Bool;
12use crate::arrays::BoolArray;
13use crate::arrays::slice::SliceReduce;
14use crate::buffer::BufferHandle;
15
16impl SliceReduce for Bool {
17    fn slice(array: ArrayView<'_, Bool>, range: Range<usize>) -> VortexResult<Option<ArrayRef>> {
18        let (byte_start, meta) = array.meta.slice(range.clone());
19        let byte_end = byte_start + meta.byte_len();
20
21        let bits = if let Some(host) = array.bits.as_host_opt() {
22            BufferHandle::new_host(host.slice_unaligned(byte_start..byte_end))
23        } else {
24            array.bits.slice(byte_start..byte_end)
25        };
26        let validity = array.validity()?.slice(range)?;
27
28        let array = BoolArray::try_new_from_handle(bits, meta.offset(), meta.len(), validity)?;
29
30        Ok(Some(array.into_array()))
31    }
32}