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  • c++ zlib(qt)压缩与解压缩

    #include <QtCore/QCoreApplication>
    #include "zlib.h"
    #include "stdio.h"
    #include <iostream>
    using   namespace   std;
    
    #define MaxBufferSize 999999
    
    void Test1();
    void Test2();
    
    int main(int argc, char *argv[])
    {
        QCoreApplication a(argc, argv);
    
        //Test1();
        Test2();
        
        return a.exec();
    }
    
    //c++ zlib
    void Test1()
    {
        FILE* File_src;
        FILE* File_compress;
        FILE* File_uncompress;
    
        unsigned long len_src;
        unsigned long len_compress;
        unsigned long len_uncompress;
    
        unsigned char *buffer_src  = new unsigned char[MaxBufferSize];
        unsigned char *buffer_compress  = new unsigned char[MaxBufferSize];
        unsigned char *buffer_uncompress = new unsigned char[MaxBufferSize];
    
        File_src = fopen("src.txt","r");
        File_compress = fopen("compress.txt","w");
        File_uncompress = fopen("uncompress.txt","w");
    
        //compress
        len_src = fread(buffer_src,sizeof(char),MaxBufferSize-1,File_src);
        compress(buffer_compress,&len_compress,buffer_src,len_src);
        fwrite(buffer_compress,sizeof(char),len_compress,File_compress);
        cout << "normal zlib:" << endl;
        cout << "src:\n" << buffer_src << ",length:" << len_src << endl << endl;
        cout << "compress:\n" << buffer_compress << ",length:" << len_compress << endl << endl;
    
        //uncompress
        uncompress(buffer_uncompress,&len_uncompress,buffer_compress,len_compress);
        fwrite(buffer_uncompress,sizeof(char),len_uncompress,File_uncompress);
        cout << "uncompress:\n" << buffer_uncompress << ",length:" << len_uncompress << endl << endl;
    
        fclose(File_src);
        fclose(File_compress);
        fclose(File_uncompress);
    }
    
    //qt zlib
    void Test2()
    {
        QByteArray src;
        src.append("中华人民共和国,china mobile,123456");
    
        unsigned long len_compress;
        unsigned long len_uncompress;
    
        unsigned char *buffer_compress  = new unsigned char[MaxBufferSize];
        unsigned char *buffer_uncompress = new unsigned char[MaxBufferSize];
    
        compress(buffer_compress,&len_compress,(Bytef*)src.data(), src.length());
        uncompress(buffer_uncompress,&len_uncompress,buffer_compress,len_compress);
    
        cout << "qt zlib:" << endl;
        cout << "src:\n" << src.data() << ",length:" << src.size() << endl << endl;
        cout << "compress:\n" << buffer_compress << ",length:" << len_compress << endl << endl;
        cout << "uncompress:\n" << buffer_uncompress << ",length:" << len_uncompress << endl << endl;
    }
    

      

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  • 原文地址:https://www.cnblogs.com/chuncn/p/1992481.html
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