zlib 的使用

1. 下載zlib,附件是zlib 1.2.3 .

2. 解壓代碼，打開 .\projects\visualc6\zlib.dsw .

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

4. 在我們的工程中包含頭文件 zlib.h / zconf.h ,和連接生成的Lib .

5. 測試代碼

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 :

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

//壓縮之後的數據
unsigned char achComp[1024];
unsigned long nCompLen = 1024 ;

//解壓縮之後的數據
unsigned char achUncomp[1024];
unsigned long nUncompLen = 1024 ;

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

//解壓縮
uncompress(achUncomp,&nUncompLen, achComp,nCompLen);

//顯示原始數據信息
printf("原始數據(%d):\n%s\n\n", nSrcLen,pchSrc);

//顯示壓縮之後的數據
printf("壓縮數據(%d):\n%s\n\n", nCompLen,achComp);

//顯示解壓縮之後的數據
printf("解壓數據(%d):\n%s\n\n", nUncompLen,achUncomp);