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 27namespace 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. 33google::protobuf::io::CopyingInputStreamAdaptor * 34protobuf_lite_file_input_stream(const std::string& file_path); 35 36 37class 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