官网:http://www.zlib.net/ ,所有版本下载:http://www.zlib.net/fossils/
ZC: 我下载的是 zlib-1.2.3.tar.gz 和 zlib-1.2.11.tar.gz(20170626当前最新版)
ZC: 我是看的一个网上的教程,具体文章不知道是哪个了...
ZC: zlib-1.2.3.tar.gz的编译方法是 进入目录“...zlib-1.2.3projectsvisualc6”,用VC6打开 zlib.dsw,然后进行编译。最主要需要 这3个文件:zlib.h、zconf.h、zlib.lib 。
ZC: zlib-1.2.11.tar.gz的编译方法是看了“README”知道的...(方式一):进入目录“...zlib-1.2.11win32”用命令行编译 (方式二):进入目录“...contribvstudio...” 选择对应版本的VS目录 然后进行编译 (我没有实际使用 zlib-1.2.11.tar.gz 进行编译 和 编码...)
zlib-1.2.3.tar.gz 的 测试使用代码:
#include <stdio.h> #include <windows.h> #include "zlib.h" #pragma comment(lib,"zlib") void main() { HANDLE pfile=::CreateFile("C:\111.bmp",GENERIC_READ,0,NULL,OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS,NULL);//用这个函数比OpenFile好 if(pfile==INVALID_HANDLE_VALUE) { MessageBox(NULL,"打开文件失败","Error",MB_OK); CloseHandle(pfile);//一定注意在函数退出之前对句柄进行释放。 return; } DWORD filesize = GetFileSize(pfile,NULL); char* buffer = new char[filesize+1];//最后一位为'/0',C-Style字符串的结束符。 DWORD readsize = 0; ReadFile(pfile,buffer,filesize,&readsize,NULL); DWORD dwTick1 = ::GetTickCount(); //printf("filesize : %d, ::GetTickCount() : %d ", filesize, dwTick1); //* //压缩 BYTE *dest = new BYTE[filesize]; unsigned long destSize = filesize; //Z_OK int iRtn = compress(dest, &destSize, (unsigned char*)buffer, filesize); //#define Z_BUF_ERROR (-5) printf("iRtn : %d ", iRtn); printf("destSize : %d, ::GetTickCount() : %d ", destSize, ::GetTickCount()); //*/ //#define Z_NO_COMPRESSION 0 //#define Z_BEST_SPEED 1 //#define Z_BEST_COMPRESSION 9 //#define Z_DEFAULT_COMPRESSION (-1) // *** //* // 解压 unsigned long nSize = 1024*40000; BYTE *target=new BYTE[nSize]; iRtn = uncompress(target, &nSize, dest, destSize); printf("iRtn : %d ", iRtn); printf("nSize : %d, ::GetTickCount() : %d ", nSize, ::GetTickCount()); //*/ //* HANDLE pWfile=::CreateFile("C:\z01.bmp",GENERIC_WRITE|GENERIC_READ,0,NULL,CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,NULL);//用这个函数比OpenFile好 if(pWfile==INVALID_HANDLE_VALUE) { //MessageBox(NULL,"打开文件失败","Error",MB_OK); CloseHandle(pWfile);//一定注意在函数退出之前对句柄进行释放。 return; } DWORD writesize = 0; //::WriteFile(pWfile,buffer,filesize,&writesize,NULL); ::WriteFile(pWfile,target,nSize,&writesize,NULL); //善后工作 delete[]buffer;//注意是delete[]而不是delete CloseHandle(pWfile);//关闭句柄 //*/ }
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