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 #pragma once 18 19 #include <cstdint> 20 #include <forward_list> 21 #include <vector> 22 23 #include "packet/iterator.h" 24 #include "packet/view.h" 25 26 namespace bluetooth { 27 namespace packet { 28 29 static const bool kLittleEndian = true; 30 31 // Abstract base class that is subclassed to provide type-specifc accessors. 32 // Holds a shared pointer to the underlying data. 33 // The template parameter little_endian controls the generation of extract(). 34 template <bool little_endian> 35 class PacketView { 36 public: 37 explicit PacketView(std::forward_list<View> fragments); 38 explicit PacketView(std::shared_ptr<const std::vector<uint8_t>> packet); 39 PacketView(const PacketView& PacketView) = default; 40 PacketView<little_endian>() = delete; 41 virtual ~PacketView() = default; 42 43 Iterator<little_endian> begin() const; 44 Iterator<little_endian> end() const; 45 46 uint8_t operator[](size_t i) const; 47 uint8_t at(size_t index) const; 48 49 size_t size() const; 50 51 PacketView<true> GetLittleEndianSubview(size_t begin, size_t end) const; 52 PacketView<false> GetBigEndianSubview(size_t begin, size_t end) const; 53 54 protected: 55 void Append(PacketView to_add); 56 57 private: 58 std::forward_list<View> fragments_; 59 size_t length_; 60 61 std::forward_list<View> GetSubviewList(size_t begin, size_t end) const; 62 }; 63 64 } // namespace packet 65 } // namespace bluetooth 66