arrow_data/equal/
fixed_list.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18use crate::data::{contains_nulls, ArrayData};
19use arrow_schema::DataType;
20
21use super::equal_range;
22
23pub(super) fn fixed_list_equal(
24    lhs: &ArrayData,
25    rhs: &ArrayData,
26    lhs_start: usize,
27    rhs_start: usize,
28    len: usize,
29) -> bool {
30    let size = match lhs.data_type() {
31        DataType::FixedSizeList(_, i) => *i as usize,
32        _ => unreachable!(),
33    };
34
35    let lhs_values = &lhs.child_data()[0];
36    let rhs_values = &rhs.child_data()[0];
37
38    // Only checking one null mask here because by the time the control flow reaches
39    // this point, the equality of the two masks would have already been verified.
40    if !contains_nulls(lhs.nulls(), lhs_start, len) {
41        equal_range(
42            lhs_values,
43            rhs_values,
44            (lhs_start + lhs.offset()) * size,
45            (rhs_start + rhs.offset()) * size,
46            size * len,
47        )
48    } else {
49        // get a ref of the null buffer bytes, to use in testing for nullness
50        let lhs_nulls = lhs.nulls().unwrap();
51        let rhs_nulls = rhs.nulls().unwrap();
52        // with nulls, we need to compare item by item whenever it is not null
53        (0..len).all(|i| {
54            let lhs_pos = lhs_start + i;
55            let rhs_pos = rhs_start + i;
56
57            let lhs_is_null = lhs_nulls.is_null(lhs_pos);
58            let rhs_is_null = rhs_nulls.is_null(rhs_pos);
59
60            lhs_is_null
61                || (lhs_is_null == rhs_is_null)
62                    && equal_range(
63                        lhs_values,
64                        rhs_values,
65                        (lhs_pos + lhs.offset()) * size,
66                        (rhs_pos + rhs.offset()) * size,
67                        size, // 1 * size since we are comparing a single entry
68                    )
69        })
70    }
71}
arrow_data/equal/fixed_list.rs

arrow_data/equal/
fixed_list.rs
