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zip

zip-unzip

基于C语言 跨平台zip/unzip

zip

(1) 传统用法，从现有文件创建zip文件

    HZIP hz = CreateZip("c:\\simple1.zip",0);ZipAdd(hz,"znsimple.bmp", "c:\\simple.bmp");ZipAdd(hz,"znsimple.txt", "c:\\simple.txt");CloseZip(hz);

(2) 内存使用，从各种来源创建一个自动分配的基于内存的zip文件

    HZIP hz = CreateZip(0,100000, 0);// adding a conventional file...ZipAdd(hz,"src1.txt",  "c:\\src1.txt");// adding something from memory...char buf[1000];for (int i=0; i<1000; i++) buf[i]=(char)(i&0x7F);ZipAdd(hz,"file.dat",  buf,1000);// adding something from a pipe...HANDLE hread,hwrite; CreatePipe(&hread,&hwrite,NULL,0);HANDLE hthread = CreateThread(0,0,ThreadFunc,(void*)hwrite,0,0);ZipAdd(hz,"unz3.dat",  hread,1000);  // the '1000' is optional.WaitForSingleObject(hthread,INFINITE);CloseHandle(hthread); CloseHandle(hread);// and now that the zip is created, let's do something with it:void *zbuf; unsigned long zlen; ZipGetMemory(hz,&zbuf,&zlen);HANDLE hfz = CreateFile("test2.zip",GENERIC_WRITE,0,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0);LDWORD writ; WriteFile(hfz,zbuf,zlen,&writ,NULL);CloseHandle(hfz);CloseZip(hz);

(3) 句柄用于文件句柄和管道

    HANDLE hzread,hzwrite; CreatePipe(&hzread,&hzwrite,0,0);HANDLE hthread = CreateThread(0,0,ZipReceiverThread,(void*)hzread,0,0);HZIP hz = CreateZipHandle(hzwrite,0);// ... add to itCloseZip(hz);CloseHandle(hzwrite);WaitForSingleObject(hthread,INFINITE);CloseHandle(hthread);

unzip

(1) 传统方法

	SetCurrentDirectory("c:\\docs\\stuff");HZIP hz = OpenZip("c:\\stuff.zip",0);ZIPENTRY ze; GetZipItem(hz,-1,&ze); int numitems=ze.index;for (int i=0; i<numitems; i++){ GetZipItem(hz,i,&ze);UnzipItem(hz,i,ze.name);}CloseZip(hz);

(2) 特殊需求

	HRSRC hrsrc = FindResource(hInstance,MAKEINTRESOURCE(1),RT_RCDATA);HANDLE hglob = LoadResource(hInstance,hrsrc);void *zipbuf=LockResource(hglob);unsigned int ziplen=SizeofResource(hInstance,hrsrc);HZIP hz = OpenZip(zipbuf, ziplen, 0);// - unzip to a membuffer -ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",true,&i,&ze);char *ibuf = new char[ze.unc_size];UnzipItem(hz,i, ibuf, ze.unc_size);delete[] ibuf;// - unzip to a fixed membuff -ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",true,&i,&ze);char ibuf[1024]; ZRESULT zr=ZR_MORE; unsigned long totsize=0;while (zr==ZR_MORE){ zr = UnzipItem(hz,i, ibuf,1024);unsigned long bufsize=1024; if (zr==ZR_OK) bufsize=ze.unc_size-totsize;totsize+=bufsize;}// - unzip to a pipe -HANDLE hwrite;HANDLE hthread=CreateWavReaderThread(&hwrite);int i; ZIPENTRY ze; FindZipItem(hz,"sound.wav",true,&i,&ze);UnzipItemHandle(hz,i, hwrite);CloseHandle(hwrite);WaitForSingleObject(hthread,INFINITE);CloseHandle(hwrite); CloseHandle(hthread);//   - finished -CloseZip(hz);// note: no need to free resources obtained through Find/Load/LockResource

(3) 获取zip的item

	SetCurrentDirectory("c:\\docs\\pipedzipstuff");HANDLE hread,hwrite; CreatePipe(&hread,&hwrite,0,0);CreateZipWriterThread(hwrite);HZIP hz = OpenZipHandle(hread,0);for (int i=0; ; i++){ ZIPENTRY ze;ZRESULT zr=GetZipItem(hz,i,&ze); if (zr!=ZR_OK) break; // no moreUnzipItem(hz,i, ze.name);}CloseZip(hz);

本文标签： Zip

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