JHiroGuo/zip-unzip

基于C语言 跨平台zip/unzip

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 it

CloseZip(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 more

  UnzipItem(hz,i, ze.name);

}

CloseZip(hz);