1 /* 2 * Copyright 2018 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 <memory> 20 21 namespace bluetooth { 22 23 class Packet; 24 25 class PacketBuilder { 26 public: 27 virtual size_t size() const = 0; 28 virtual bool Serialize(const std::shared_ptr<Packet>& pkt) = 0; 29 30 virtual ~PacketBuilder() = default; 31 32 protected: 33 // Only Builders should be able to call these 34 void ReserveSpace(const std::shared_ptr<Packet>& pkt, size_t size); 35 bool AddPayloadOctets1(const std::shared_ptr<Packet>& pkt, uint8_t value) { 36 return AddPayloadOctets(pkt, 1, value); 37 } 38 bool AddPayloadOctets2(const std::shared_ptr<Packet>& pkt, uint16_t value) { 39 return AddPayloadOctets(pkt, 2, value); 40 } 41 bool AddPayloadOctets3(const std::shared_ptr<Packet>& pkt, uint32_t value) { 42 return AddPayloadOctets(pkt, 3, value); 43 } 44 bool AddPayloadOctets4(const std::shared_ptr<Packet>& pkt, uint32_t value) { 45 return AddPayloadOctets(pkt, 4, value); 46 } 47 bool AddPayloadOctets6(const std::shared_ptr<Packet>& pkt, uint64_t value) { 48 return AddPayloadOctets(pkt, 6, value); 49 } 50 bool AddPayloadOctets8(const std::shared_ptr<Packet>& pkt, uint64_t value) { 51 return AddPayloadOctets(pkt, 8, value); 52 } 53 54 private: 55 // Add |octets| bytes to the payload. Return true if: 56 // - the value of |value| fits in |octets| bytes and 57 // - the new size of the payload is still < |kMaxPayloadOctets| 58 bool AddPayloadOctets(const std::shared_ptr<Packet>& pkt, size_t octets, 59 uint64_t value); 60 }; 61 62 } // namespace bluetooth
