/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "packet/iterator.h"
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#include "os/log.h"
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namespace bluetooth {
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namespace packet {
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template <bool little_endian>
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Iterator<little_endian>::Iterator(std::forward_list<View> data, size_t offset) {
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data_ = data;
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index_ = offset;
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length_ = 0;
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for (auto& view : data) {
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length_ += view.size();
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}
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}
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template <bool little_endian>
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Iterator<little_endian> Iterator<little_endian>::operator+(int offset) {
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auto itr(*this);
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return itr += offset;
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}
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template <bool little_endian>
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Iterator<little_endian>& Iterator<little_endian>::operator+=(int offset) {
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index_ += offset;
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return *this;
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}
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template <bool little_endian>
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Iterator<little_endian> Iterator<little_endian>::operator++(int) {
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auto itr(*this);
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index_++;
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return itr;
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}
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template <bool little_endian>
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Iterator<little_endian>& Iterator<little_endian>::operator++() {
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index_++;
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return *this;
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}
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template <bool little_endian>
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Iterator<little_endian> Iterator<little_endian>::operator-(int offset) {
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auto itr(*this);
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return itr -= offset;
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}
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template <bool little_endian>
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int Iterator<little_endian>::operator-(Iterator<little_endian>& itr) {
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return index_ - itr.index_;
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}
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template <bool little_endian>
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Iterator<little_endian>& Iterator<little_endian>::operator-=(int offset) {
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index_ -= offset;
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return *this;
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}
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template <bool little_endian>
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Iterator<little_endian> Iterator<little_endian>::operator--(int) {
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auto itr(*this);
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if (index_ != 0) index_--;
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return itr;
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}
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template <bool little_endian>
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Iterator<little_endian>& Iterator<little_endian>::operator--() {
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if (index_ != 0) index_--;
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return *this;
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}
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template <bool little_endian>
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Iterator<little_endian>& Iterator<little_endian>::operator=(const Iterator<little_endian>& itr) {
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data_ = itr.data_;
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index_ = itr.index_;
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return *this;
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}
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template <bool little_endian>
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bool Iterator<little_endian>::operator==(const Iterator<little_endian>& itr) const {
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return index_ == itr.index_;
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}
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template <bool little_endian>
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bool Iterator<little_endian>::operator!=(const Iterator<little_endian>& itr) const {
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return !(*this == itr);
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}
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template <bool little_endian>
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bool Iterator<little_endian>::operator<(const Iterator<little_endian>& itr) const {
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return index_ < itr.index_;
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}
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template <bool little_endian>
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bool Iterator<little_endian>::operator>(const Iterator<little_endian>& itr) const {
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return index_ > itr.index_;
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}
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template <bool little_endian>
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bool Iterator<little_endian>::operator<=(const Iterator<little_endian>& itr) const {
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return index_ <= itr.index_;
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}
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template <bool little_endian>
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bool Iterator<little_endian>::operator>=(const Iterator<little_endian>& itr) const {
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return index_ >= itr.index_;
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}
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template <bool little_endian>
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uint8_t Iterator<little_endian>::operator*() const {
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ASSERT_LOG(index_ < length_, "Index %zu out of bounds: %zu", index_, length_);
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size_t index = index_;
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for (auto view : data_) {
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if (index < view.size()) {
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return view[index];
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}
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index -= view.size();
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}
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ASSERT_LOG(false, "Out of fragments searching for index %zu", index_);
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return 0;
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}
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template <bool little_endian>
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size_t Iterator<little_endian>::NumBytesRemaining() const {
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if (length_ > index_) {
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return length_ - index_;
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} else {
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return 0;
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}
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}
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// Explicit instantiations for both types of Iterators.
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template class Iterator<true>;
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template class Iterator<false>;
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} // namespace packet
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} // namespace bluetooth
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