1 /*
2  * Copyright 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "packet/view.h"
18 
19 #include "os/log.h"
20 
21 namespace bluetooth {
22 namespace packet {
23 
24 View::View(std::shared_ptr<const std::vector<uint8_t>> data, size_t begin, size_t end)
25     : data_(data), begin_(begin < data_->size() ? begin : data_->size()),
26       end_(end < data_->size() ? end : data_->size()) {}
27 
28 View::View(const View& view, size_t begin, size_t end) : data_(view.data_) {
29   begin_ = (begin < view.size() ? begin : view.size());
30   begin_ += view.begin_;
31   end_ = (end < view.size() ? end : view.size());
32   end_ += view.begin_;
33 }
34 
35 uint8_t View::operator[](size_t i) const {
36   ASSERT_LOG(i + begin_ < end_, "Out of bounds access at %zu", i);
37   return data_->operator[](i + begin_);
38 }
39 
40 size_t View::size() const {
41   return end_ - begin_;
42 }
43 }  // namespace packet
44 }  // namespace bluetooth
45