zlib 的使用

1. 下载zlib,附件是zlib 1.2.3 .

2. 解压代码，打开 .\projects\visualc6\zlib.dsw .

3. Build :  zlib Lib Debug / zlib Lib Release ,生成的zlib.lib/zlibd.lib .

4. 在我们的工程中包含头文件 zlib.h / zconf.h ,和连接生成的Lib .

5. 测试代码

Write to file :

char * pchData = "xxx..." ;    
gzFile fData = gzopen(pchFile,"wb");    
gzwrite(fData,pchData,strlen(pchData));    
gzclose(fData);

 

read from file :

 

char pchData[1024];    
gzFile fData = gzopen(pchFile,"rb");    
int n = gzread(fData,pchData,1024);    
gzclose(fData);

 

Buffer test :

 

//原始数据    
unsigned char pchSrc[] = "xxx...." ;    
unsigned long nSrcLen = sizeof(pchSrc);    

//压缩之后的数据    
unsigned char achComp[1024];    
unsigned long nCompLen = 1024 ;    

//解压缩之后的数据    
unsigned char achUncomp[1024];    
unsigned long nUncompLen = 1024 ;    

//压缩    
compress(achComp,&nCompLen, pchSrc,nSrcLen);    

//解压缩    
uncompress(achUncomp,&nUncompLen, achComp,nCompLen);    

//显示原始数据信息    
printf("原始数据(%d):\n%s\n\n", nSrcLen,pchSrc);    

//显示压缩之后的数据    
printf("压缩数据(%d):\n%s\n\n", nCompLen,achComp);    

//显示解压缩之后的数据    
printf("解压数据(%d):\n%s\n\n", nUncompLen,achUncomp);