| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| use crate::array::{data::count_nulls, ArrayData}; |
| use crate::buffer::Buffer; |
| use crate::util::bit_util::get_bit; |
| |
| use super::utils::{equal_bits, equal_len}; |
| |
| pub(super) fn boolean_equal( |
| lhs: &ArrayData, |
| rhs: &ArrayData, |
| lhs_nulls: Option<&Buffer>, |
| rhs_nulls: Option<&Buffer>, |
| mut lhs_start: usize, |
| mut rhs_start: usize, |
| mut len: usize, |
| ) -> bool { |
| let lhs_values = lhs.buffers()[0].as_slice(); |
| let rhs_values = rhs.buffers()[0].as_slice(); |
| |
| let lhs_null_count = count_nulls(lhs_nulls, lhs_start, len); |
| let rhs_null_count = count_nulls(rhs_nulls, rhs_start, len); |
| |
| if lhs_null_count == 0 && rhs_null_count == 0 { |
| // Optimize performance for starting offset at u8 boundary. |
| if lhs_start % 8 == 0 && rhs_start % 8 == 0 { |
| let quot = len / 8; |
| if quot > 0 |
| && !equal_len( |
| lhs_values, |
| rhs_values, |
| lhs_start / 8 + lhs.offset(), |
| rhs_start / 8 + rhs.offset(), |
| quot, |
| ) |
| { |
| return false; |
| } |
| |
| // Calculate for suffix bits. |
| let rem = len % 8; |
| if rem == 0 { |
| return true; |
| } else { |
| let aligned_bits = len - rem; |
| lhs_start += aligned_bits; |
| rhs_start += aligned_bits; |
| len = rem |
| } |
| } |
| |
| equal_bits( |
| lhs_values, |
| rhs_values, |
| lhs_start + lhs.offset(), |
| rhs_start + rhs.offset(), |
| len, |
| ) |
| } else { |
| // get a ref of the null buffer bytes, to use in testing for nullness |
| let lhs_null_bytes = lhs_nulls.as_ref().unwrap().as_slice(); |
| let rhs_null_bytes = rhs_nulls.as_ref().unwrap().as_slice(); |
| |
| let lhs_start = lhs.offset() + lhs_start; |
| let rhs_start = rhs.offset() + rhs_start; |
| |
| (0..len).all(|i| { |
| let lhs_pos = lhs_start + i; |
| let rhs_pos = rhs_start + i; |
| let lhs_is_null = !get_bit(lhs_null_bytes, lhs_pos); |
| let rhs_is_null = !get_bit(rhs_null_bytes, rhs_pos); |
| |
| lhs_is_null |
| || (lhs_is_null == rhs_is_null) |
| && equal_bits(lhs_values, rhs_values, lhs_pos, rhs_pos, 1) |
| }) |
| } |
| } |