c++ - C++中二维float数组的序列化与反序列化

Question

我有一个结构:

struct Desc {
    int rows;
    int cols;
}

和二维 float 组。

我需要通过网络传输结构和数据。如何正确序列化/反序列化？

这就是我现在做的:

Desc desc;
desc.rows = 32;
desc.cols = 1024;
float data[rows][cols];
// setting values on array
char buffer[sizeof(Desc)+sizeof(float)*desc.rows*desc.probes];
memcpy(&buffer[0], &desc, sizeof(Desc));    // copying struct into the buffer
memcpy(&buffer[0]+sizeof(Desc), &data, sizeof(float)*rows*probes);    // copying data into the buffer

但我不确定这是否是正确的方法。

有人可以给我一些提示吗？

Answer 1

如果您继续使用 C++ 并希望提高效率，我会使用 Boost Serialization - 否则 JSON 可能是你的 friend 。我改编了 demo用于将您的结构序列化为文件 - 但基本上它写入/读取流。

#include <fstream>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>

struct Desc {
    int rows;
    int cols;

    private:

    friend class boost::serialization::access;

    template<class Archive>
    void serialize(Archive & ar, const unsigned int version)
    {
        ar & rows;
        ar & cols;
    }

    public:
    Desc()
    {
        rows=0;
        cols=0;
    };

};

int main() {

    std::ofstream ofs("filename");

    // prepare dummy struct
    Desc data;
    data.rows=11;
    data.cols=22;

    // save struct to file
    {
        boost::archive::text_oarchive out_arch(ofs);
        out_arch << data;
        // archive and stream closed when destructors are called
    }

    //...load struct from file
    Desc data2;
    {
        std::ifstream ifs("filename");
        boost::archive::text_iarchive in_arch(ifs);
        in_arch >> data2;
        // archive and stream closed when destructors are called
    }
    return 0;
}

注意:我没有检查这个例子是否有效。

*约斯特