| /* |
| * Copyright 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| #include <array> |
| #include <variant> |
| |
| #include "bluetooth/uuid.h" |
| #include "packet.h" |
| #include "sdp_common.h" |
| #include "stack/include/bt_types.h" |
| |
| namespace bluetooth { |
| namespace sdp { |
| |
| // A helper class that helps extract data element objects from SDP packets. |
| class DataElementReader { |
| public: |
| // If the DataElement contains monostate, that means parsing has failed. |
| using DataElement = |
| std::variant<std::monostate, bool, int8_t, int16_t, int32_t, int64_t, |
| uint8_t, uint16_t, uint32_t, uint64_t, Octet16, Uuid, |
| std::string, DataElementReader>; |
| |
| DataElementReader(Iterator begin, Iterator end) : it_(begin), end_(end){}; |
| |
| // Get the next Data Element in the data. If reading fails for any reason, |
| // the DataElementReader becomes invalid and will continuously fail to read |
| // from that point onward. |
| DataElement ReadNext(); |
| |
| private: |
| // Extraction Helpers |
| DataElement ParseFail(); |
| template <class IntegerType> |
| DataElement ReadInteger(); |
| DataElement ReadLargeInt(); |
| |
| // Extraction Functions |
| DataElement ReadSignedInt(DataElementSize size); |
| DataElement ReadUnsignedInt(DataElementSize size); |
| DataElement ReadUuid(DataElementSize size); |
| DataElement ReadString(DataElementSize size); |
| DataElement ReadSequence(DataElementSize size); |
| |
| Iterator it_; |
| Iterator end_; |
| }; |
| |
| } // namespace sdp |
| } // namespace bluetooth |