Prathmesh Prabhu | 28b4a3b | 2014-03-28 11:52:09 -0700 | [diff] [blame] | 1 | // Copyright (c) 2014 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef SHILL_PROTOBUF_LITE_STREAMS_H_ |
| 6 | #define SHILL_PROTOBUF_LITE_STREAMS_H_ |
| 7 | |
| 8 | #include <string> |
| 9 | |
| 10 | #include <base/file_util.h> |
| 11 | #include <google/protobuf/io/zero_copy_stream_impl_lite.h> |
| 12 | |
| 13 | // Some basic input/output streams are not implemented for protobuf-lite. |
| 14 | |
| 15 | namespace shill { |
| 16 | |
| 17 | // Attempts to create a |google::protobuf::io::CopyingInputStreamAdaptor| using |
| 18 | // a |shill::ProtobufLiteCopyingFileInputStream|. Returns a new instance on |
| 19 | // success. The caller owns the new instance, and must free it when done. |
| 20 | // Returns NULL on failure. |
| 21 | google::protobuf::io::CopyingInputStreamAdaptor * |
| 22 | protobuf_lite_file_input_stream(const std::string &file_path); |
| 23 | |
| 24 | |
| 25 | class ProtobufLiteCopyingFileInputStream : |
| 26 | public google::protobuf::io::CopyingInputStream { |
| 27 | public: |
| 28 | // Takes ownership of |fd| and closes it when the object is deleted. |
| 29 | explicit ProtobufLiteCopyingFileInputStream(int fd); |
| 30 | virtual ~ProtobufLiteCopyingFileInputStream(); |
| 31 | virtual int Read(void *buffer, int size); |
| 32 | virtual int Skip(int count); |
| 33 | private: |
| 34 | int fd_; |
| 35 | file_util::ScopedFD scoped_fd_closer_; |
| 36 | bool previous_seek_failed_; |
| 37 | |
| 38 | DISALLOW_COPY_AND_ASSIGN(ProtobufLiteCopyingFileInputStream); |
| 39 | }; |
| 40 | |
| 41 | } // namespace shill |
| 42 | |
| 43 | #endif // SHILL_PROTOBUF_LITE_STREAMS_H_ |