1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef STREAM_PACKETIZER_H
17 #define STREAM_PACKETIZER_H
18 
19 #include <memory>
20 #include <sys/types.h>
21 #include <utility>
22 
23 #include "i_stream.h"
24 
25 namespace Communication {
26 namespace SoftBus {
27 class StreamPacketizer {
28 public:
StreamPacketizer(int streamType,std::unique_ptr<IStream> data)29     StreamPacketizer(int streamType, std::unique_ptr<IStream> data)
30     {
31         originData_ = std::move(data);
32         streamType_ = streamType;
33     }
34     virtual ~StreamPacketizer() = default;
35 
36     ssize_t CalculateHeaderSize() const;
37     ssize_t CalculateExtSize(ssize_t extSize) const;
38 
39     std::unique_ptr<char[]> PacketizeStream();
GetPacketLen()40     ssize_t GetPacketLen() const
41     {
42         return hdrSize_ + dataSize_ + extSize_;
43     }
44 
GetHeaderLen()45     ssize_t GetHeaderLen() const
46     {
47         return hdrSize_ + extSize_;
48     }
49 
50 private:
51     ssize_t hdrSize_ = 0;
52     ssize_t dataSize_ = 0;
53     ssize_t extSize_ = 0;
54     std::unique_ptr<IStream> originData_ = nullptr;
55     int streamType_ = INVALID;
56 };
57 } // namespace SoftBus
58 } // namespace Communication
59 
60 #endif
61