Comment gérer les problèmes de compression et de décompression des données dans le développement Big Data C++ ?

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <cassert>
#include <zlib.h>

std::string compressData(const std::string& input)
{
    z_stream zs;                        // z_stream is zlib's control structure
    memset(&zs, 0, sizeof(zs));

    if (deflateInit(&zs, Z_DEFAULT_COMPRESSION) != Z_OK)
        throw(std::runtime_error("deflateInit failed while compressing."));

    zs.next_in = (Bytef*)input.data();
    zs.avail_in = input.size();           // set the z_stream's input

    int ret;
    char outbuffer[32768];
    std::string outstring;

    // retrieve the compressed bytes blockwise
    do {
        zs.next_out = reinterpret_cast<Bytef*>(outbuffer);
        zs.avail_out = sizeof(outbuffer);

        ret = deflate(&zs, Z_FINISH);

        if (outstring.size() < zs.total_out) {
            // append the block to the output string
            outstring.append(outbuffer, zs.total_out - outstring.size());
        }
    } while (ret == Z_OK);

    deflateEnd(&zs);

    if (ret != Z_STREAM_END) {          // an error occurred that was not EOF
        std::ostringstream oss;
        oss << "Exception during zlib compression: (" << ret << ") " << zs.msg;
        throw(std::runtime_error(oss.str()));
    }

    return outstring;
}

int main()
{
    std::string input = "This is a sample string to be compressed.";
    std::string compressed = compressData(input);

    std::cout << "Original size: " << input.size() << std::endl;
    std::cout << "Compressed size: " << compressed.size() << std::endl;

    return 0;
}

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <cassert>
#include <zlib.h>

std::string decompressData(const std::string& input)
{
    z_stream zs;                        // z_stream is zlib's control structure
    memset(&zs, 0, sizeof(zs));

    if (inflateInit(&zs) != Z_OK)
        throw(std::runtime_error("inflateInit failed while decompressing."));

    zs.next_in = (Bytef*)input.data();
    zs.avail_in = input.size();

    int ret;
    char outbuffer[32768];
    std::string outstring;

    // get the decompressed bytes blockwise using repeated calls to inflate
    do {
        zs.next_out = reinterpret_cast<Bytef*>(outbuffer);
        zs.avail_out = sizeof(outbuffer);

        ret = inflate(&zs, 0);

        if (outstring.size() < zs.total_out) {
            outstring.append(outbuffer, zs.total_out - outstring.size());
        }

    } while (ret == Z_OK);

    inflateEnd(&zs);

    if (ret != Z_STREAM_END) {          // an error occurred that was not EOF
        std::ostringstream oss;
        oss << "Exception during zlib decompression: (" << ret << ") "
            << zs.msg;
        throw(std::runtime_error(oss.str()));
    }

    return outstring;
}

int main()
{

    std::string decompressed = decompressData(compressed);

    std::cout << "Compressed size: " << compressed.size() << std::endl;
    std::cout << "Decompressed size: " << decompressed.size() << std::endl;

    return 0;
}