55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
//
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// Copyright (C) 2014 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef SHILL_PROTOBUF_LITE_STREAMS_H_
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#define SHILL_PROTOBUF_LITE_STREAMS_H_
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#include <string>
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#include <base/files/scoped_file.h>
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#include <google/protobuf/io/zero_copy_stream_impl_lite.h>
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// Some basic input/output streams are not implemented for protobuf-lite.
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namespace shill {
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// Attempts to create a |google::protobuf::io::CopyingInputStreamAdaptor| using
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// a |shill::ProtobufLiteCopyingFileInputStream|. Returns a new instance on
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// success. The caller owns the new instance, and must free it when done.
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// Returns nullptr on failure.
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google::protobuf::io::CopyingInputStreamAdaptor *
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protobuf_lite_file_input_stream(const std::string& file_path);
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class ProtobufLiteCopyingFileInputStream :
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public google::protobuf::io::CopyingInputStream {
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public:
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// Takes ownership of |fd| and closes it when the object is deleted.
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explicit ProtobufLiteCopyingFileInputStream(int fd);
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~ProtobufLiteCopyingFileInputStream() override;
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int Read(void* buffer, int size) override;
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int Skip(int count) override;
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private:
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int fd_;
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base::ScopedFD scoped_fd_closer_;
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bool previous_seek_failed_;
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DISALLOW_COPY_AND_ASSIGN(ProtobufLiteCopyingFileInputStream);
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};
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} // namespace shill
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#endif // SHILL_PROTOBUF_LITE_STREAMS_H_
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