1 // 2 // Copyright (C) 2014 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 #ifndef SHILL_PROTOBUF_LITE_STREAMS_H_ 18 #define SHILL_PROTOBUF_LITE_STREAMS_H_ 19 20 #include <string> 21 22 #include <base/files/scoped_file.h> 23 #include <google/protobuf/io/zero_copy_stream_impl_lite.h> 24 25 // Some basic input/output streams are not implemented for protobuf-lite. 26 27 namespace shill { 28 29 // Attempts to create a |google::protobuf::io::CopyingInputStreamAdaptor| using 30 // a |shill::ProtobufLiteCopyingFileInputStream|. Returns a new instance on 31 // success. The caller owns the new instance, and must free it when done. 32 // Returns nullptr on failure. 33 google::protobuf::io::CopyingInputStreamAdaptor * 34 protobuf_lite_file_input_stream(const std::string& file_path); 35 36 37 class ProtobufLiteCopyingFileInputStream : 38 public google::protobuf::io::CopyingInputStream { 39 public: 40 // Takes ownership of |fd| and closes it when the object is deleted. 41 explicit ProtobufLiteCopyingFileInputStream(int fd); 42 ~ProtobufLiteCopyingFileInputStream() override; 43 int Read(void* buffer, int size) override; 44 int Skip(int count) override; 45 private: 46 int fd_; 47 base::ScopedFD scoped_fd_closer_; 48 bool previous_seek_failed_; 49 50 DISALLOW_COPY_AND_ASSIGN(ProtobufLiteCopyingFileInputStream); 51 }; 52 53 } // namespace shill 54 55 #endif // SHILL_PROTOBUF_LITE_STREAMS_H_ 56