C++中gzip压缩的流操作有哪些

在C++中，可以使用zlib库来进行gzip压缩和解压缩的操作。以下是使用zlib库进行gzip压缩和解压缩的流操作：

#include <zlib.h>std::string compressData(const std::string& data){    z_stream strm;    strm.zalloc = Z_NULL;    strm.zfree = Z_NULL;    strm.opaque = Z_NULL;    strm.next_in = (Bytef*)data.data();    strm.avail_in = data.size();    if (deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 15 | 16, 8, Z_DEFAULT_STRATEGY) != Z_OK)    {        return "";    }    std::string compressedData;    char out[1024];    do    {        strm.next_out = (Bytef*)out;        strm.avail_out = sizeof(out);        if (deflate(&strm, Z_FINISH) == Z_STREAM_ERROR)        {            deflateEnd(&strm);            return "";        }        compressedData.append(out, sizeof(out) - strm.avail_out);    } while (strm.avail_out == 0);    deflateEnd(&strm);    return compressedData;}

#include <zlib.h>std::string decompressData(const std::string& compressedData){    z_stream strm;    strm.zalloc = Z_NULL;    strm.zfree = Z_NULL;    strm.opaque = Z_NULL;    strm.next_in = (Bytef*)compressedData.data();    strm.avail_in = compressedData.size();    if (inflateInit2(&strm, 15 | 16) != Z_OK)    {        return "";    }    std::string decompressedData;    char out[1024];    do    {        strm.next_out = (Bytef*)out;        strm.avail_out = sizeof(out);        if (inflate(&strm, Z_NO_FLUSH) == Z_STREAM_ERROR)        {            inflateEnd(&strm);            return "";        }        decompressedData.append(out, sizeof(out) - strm.avail_out);    } while (strm.avail_out == 0);    inflateEnd(&strm);    return decompressedData;}