| /* |
| * Copyright (C) 2023 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. |
| */ |
| |
| #ifndef INCLUDE_PERFETTO_PROTOZERO_GEN_FIELD_HELPERS_H_ |
| #define INCLUDE_PERFETTO_PROTOZERO_GEN_FIELD_HELPERS_H_ |
| |
| #include "perfetto/protozero/message.h" |
| #include "perfetto/protozero/proto_decoder.h" |
| #include "perfetto/protozero/proto_utils.h" |
| #include "perfetto/protozero/scattered_heap_buffer.h" |
| |
| namespace protozero { |
| namespace internal { |
| namespace gen_helpers { |
| |
| // This file implements some helpers used by the protobuf generated code in the |
| // .gen.cc files. |
| // |
| // The .gen.cc generated protobuf implementation (as opposed to the .pbzero.h |
| // implementation) is not zero-copy and is not supposed to be used in fast |
| // paths, so most of these helpers are designed to reduce binary size. |
| |
| void DeserializeString(const protozero::Field& field, std::string* dst); |
| |
| // Read packed repeated elements (serialized as `wire_type`) from `field` into |
| // the `*dst` vector. Returns false if some bytes of `field` could not be |
| // interpreted correctly as `wire_type`. |
| template <proto_utils::ProtoWireType wire_type, typename CppType> |
| bool DeserializePackedRepeated(const protozero::Field& field, |
| std::vector<CppType>* dst) { |
| bool parse_error = false; |
| for (::protozero::PackedRepeatedFieldIterator<wire_type, CppType> rep( |
| field.data(), field.size(), &parse_error); |
| rep; ++rep) { |
| dst->emplace_back(*rep); |
| } |
| return !parse_error; |
| } |
| |
| extern template bool |
| DeserializePackedRepeated<proto_utils::ProtoWireType::kVarInt, uint64_t>( |
| const protozero::Field& field, |
| std::vector<uint64_t>* dst); |
| |
| extern template bool |
| DeserializePackedRepeated<proto_utils::ProtoWireType::kVarInt, int64_t>( |
| const protozero::Field& field, |
| std::vector<int64_t>* dst); |
| |
| extern template bool |
| DeserializePackedRepeated<proto_utils::ProtoWireType::kVarInt, uint32_t>( |
| const protozero::Field& field, |
| std::vector<uint32_t>* dst); |
| |
| extern template bool |
| DeserializePackedRepeated<proto_utils::ProtoWireType::kVarInt, int32_t>( |
| const protozero::Field& field, |
| std::vector<int32_t>* dst); |
| |
| // Serializers for different type of fields |
| |
| void SerializeTinyVarInt(uint32_t field_id, bool value, Message* msg); |
| |
| template <typename T> |
| void SerializeExtendedVarInt(uint32_t field_id, T value, Message* msg) { |
| msg->AppendVarInt(field_id, value); |
| } |
| |
| extern template void SerializeExtendedVarInt<uint64_t>(uint32_t field_id, |
| uint64_t value, |
| Message* msg); |
| |
| extern template void SerializeExtendedVarInt<uint32_t>(uint32_t field_id, |
| uint32_t value, |
| Message* msg); |
| |
| template <typename T> |
| void SerializeVarInt(uint32_t field_id, T value, Message* msg) { |
| SerializeExtendedVarInt( |
| field_id, proto_utils::ExtendValueForVarIntSerialization(value), msg); |
| } |
| |
| template <typename T> |
| void SerializeSignedVarInt(uint32_t field_id, T value, Message* msg) { |
| SerializeVarInt(field_id, proto_utils::ZigZagEncode(value), msg); |
| } |
| |
| template <typename T> |
| void SerializeFixed(uint32_t field_id, T value, Message* msg) { |
| msg->AppendFixed(field_id, value); |
| } |
| |
| extern template void SerializeFixed<double>(uint32_t field_id, |
| double value, |
| Message* msg); |
| |
| extern template void SerializeFixed<float>(uint32_t field_id, |
| float value, |
| Message* msg); |
| |
| extern template void SerializeFixed<uint64_t>(uint32_t field_id, |
| uint64_t value, |
| Message* msg); |
| |
| extern template void SerializeFixed<int64_t>(uint32_t field_id, |
| int64_t value, |
| Message* msg); |
| |
| extern template void SerializeFixed<uint32_t>(uint32_t field_id, |
| uint32_t value, |
| Message* msg); |
| |
| extern template void SerializeFixed<int32_t>(uint32_t field_id, |
| int32_t value, |
| Message* msg); |
| |
| void SerializeString(uint32_t field_id, const std::string& value, Message* msg); |
| |
| void SerializeUnknownFields(const std::string& unknown_fields, Message* msg); |
| |
| // Wrapper around HeapBuffered that avoids inlining. |
| class MessageSerializer { |
| public: |
| MessageSerializer(); |
| ~MessageSerializer(); |
| |
| Message* get() { return msg_.get(); } |
| std::vector<uint8_t> SerializeAsArray(); |
| std::string SerializeAsString(); |
| |
| private: |
| HeapBuffered<Message> msg_; |
| }; |
| |
| } // namespace gen_helpers |
| } // namespace internal |
| } // namespace protozero |
| |
| #endif // INCLUDE_PERFETTO_PROTOZERO_GEN_FIELD_HELPERS_H_ |