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129 lines
3.2 KiB
129 lines
3.2 KiB
/*
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* Copyright 2018 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 "iterator.h"
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#include <base/logging.h>
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#include "packet.h"
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namespace bluetooth {
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Iterator::Iterator(std::shared_ptr<const Packet> packet, size_t i) {
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packet_ = packet;
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index_ = i;
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CHECK_GE(index_, packet->packet_start_index_);
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CHECK_LE(index_, packet->packet_end_index_);
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}
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Iterator::Iterator(const Iterator& itr) { *this = itr; }
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Iterator Iterator::operator+(size_t offset) {
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auto itr(*this);
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return itr += offset;
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}
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Iterator& Iterator::operator+=(size_t offset) {
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size_t new_offset = index_ + offset;
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index_ = new_offset > packet_->packet_end_index_ ? packet_->packet_end_index_
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: new_offset;
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return *this;
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}
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Iterator Iterator::operator++(int) {
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auto itr(*this);
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index_++;
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if (index_ > packet_->packet_end_index_) index_ = packet_->packet_end_index_;
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return itr;
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}
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Iterator& Iterator::operator++() {
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index_++;
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if (index_ > packet_->packet_end_index_) index_ = packet_->packet_end_index_;
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return *this;
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}
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Iterator Iterator::operator-(size_t offset) {
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auto itr(*this);
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return itr -= offset;
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}
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int Iterator::operator-(const Iterator& itr) { return index_ - itr.index_; }
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Iterator& Iterator::operator-=(size_t offset) {
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index_ = (index_ < offset || index_ - offset < packet_->packet_start_index_)
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? packet_->packet_start_index_
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: index_ - offset;
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return *this;
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}
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Iterator Iterator::operator--(int) {
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auto itr(*this);
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if (index_ != packet_->packet_start_index_) index_--;
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return itr;
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}
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Iterator& Iterator::operator--() {
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if (index_ != packet_->packet_start_index_) index_--;
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return *this;
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}
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Iterator& Iterator::operator=(const Iterator& itr) {
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packet_ = itr.packet_;
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index_ = itr.index_;
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return *this;
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}
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bool Iterator::operator==(const Iterator& itr) const {
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return ((packet_ == itr.packet_) && (index_ == itr.index_));
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}
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bool Iterator::operator!=(const Iterator& itr) const { return !(*this == itr); }
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bool Iterator::operator<(const Iterator& itr) const {
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return ((packet_ == itr.packet_) && (index_ < itr.index_));
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}
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bool Iterator::operator>(const Iterator& itr) const {
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return ((packet_ == itr.packet_) && (index_ > itr.index_));
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}
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bool Iterator::operator<=(const Iterator& itr) const {
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return ((packet_ == itr.packet_) && (index_ <= itr.index_));
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}
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bool Iterator::operator>=(const Iterator& itr) const {
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return ((packet_ == itr.packet_) && (index_ >= itr.index_));
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}
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uint8_t Iterator::operator*() const {
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CHECK_NE(index_, packet_->packet_end_index_);
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return packet_->get_at_index(index_);
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}
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} // namespace bluetooth
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