c++ zlib(qt)压缩与解压缩-阿里云开发者社区

c++ zlib(qt)压缩与解压缩

2018-04-15 1783

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简介：

#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; 

 }

c++ zlib(qt)压缩与解压缩

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