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#ifndef _zip_H#define _zip_H// ZIP functions -- for creating zip files// This file is a repackaged form of the Info-Zip source code available// at www.info-zip.org. The original copyright notice may be found in// zip.cpp. The repackaging was done by Lucian Wischik to simplify and// extend its use in Windows/C++. Also to add encryption and unicode.#ifndef _unzip_HDECLARE_HANDLE(HZIP);#endif// An HZIP identifies a zip file that is being createdtypedef DWORD ZRESULT;// return codes from any of the zip functions. Listed later.HZIP CreateZip(const TCHAR *fn, const char *password);HZIP CreateZip(void *buf,unsigned int len, const char *password);HZIP CreateZipHandle(HANDLE h, const char *password);// CreateZip - call this to start the creation of a zip file.// As the zip is being created, it will be stored somewhere:// to a pipe: CreateZipHandle(hpipe_write);// in a file (by handle): CreateZipHandle(hfile);// in a file (by name): CreateZip("c:\\test.zip");// in memory: CreateZip(buf, len);// or in pagefile memory: CreateZip(0, len);// The final case stores it in memory backed by the system paging file,// where the zip may not exceed len bytes. This is a bit friendlier than// allocating memory with new[]: it won't lead to fragmentation, and the// memory won't be touched unless needed. That means you can give very// large estimates of the maximum-size without too much worry.// As for the password, it lets you encrypt every file in the archive.// (This api doesn't support per-file encryption.)// Note: because pipes don't allow random access, the structure of a zipfile// created into a pipe is slightly different from that created into a file// or memory. In particular, the compressed-size of the item cannot be// stored in the zipfile until after the item itself. (Also, for an item added// itself via a pipe, the uncompressed-size might not either be known until// after.) This is not normally a problem. But if you try to unzip via a pipe// as well, then the unzipper will not know these things about the item until// after it has been unzipped. Therefore: for unzippers which don't just write// each item to disk or to a pipe, but instead pre-allocate memory space into// which to unzip them, then either you have to create the zip not to a pipe,// or you have to add items not from a pipe, or at least when adding items// from a pipe you have to specify the length.// Note: for windows-ce, you cannot close the handle until after CloseZip.// but for real windows, the zip makes its own copy of your handle, so you// can close yours anytime.ZRESULT ZipAdd(HZIP hz,const TCHAR *dstzn, const TCHAR *fn);ZRESULT ZipAdd(HZIP hz,const TCHAR *dstzn, void *src,unsigned int len);ZRESULT ZipAddHandle(HZIP hz,const TCHAR *dstzn, HANDLE h);ZRESULT ZipAddHandle(HZIP hz,const TCHAR *dstzn, HANDLE h, unsigned int len);ZRESULT ZipAddFolder(HZIP hz,const TCHAR *dstzn);// ZipAdd - call this for each file to be added to the zip.// dstzn is the name that the file will be stored as in the zip file.// The file to be added to the zip can come// from a pipe: ZipAddHandle(hz,"file.dat", hpipe_read);// from a file: ZipAddHandle(hz,"file.dat", hfile);// from a filen: ZipAdd(hz,"file.dat", "c:\\docs\\origfile.dat");// from memory: ZipAdd(hz,"subdir\\file.dat", buf,len);// (folder): ZipAddFolder(hz,"subdir");// Note: if adding an item from a pipe, and if also creating the zip file itself// to a pipe, then you might wish to pass a non-zero length to the ZipAddHandle// function. This will let the zipfile store the item's size ahead of the// compressed item itself, which in turn makes it easier when unzipping the// zipfile from a pipe.ZRESULT ZipGetMemory(HZIP hz, void **buf, unsigned long *len);// ZipGetMemory - If the zip was created in memory, via ZipCreate(0,len),// then this function will return information about that memory block.// buf will receive a pointer to its start, and len its length.// Note: you can't add any more after calling this.ZRESULT CloseZip(HZIP hz);// CloseZip - the zip handle must be closed with this function.unsigned int FormatZipMessage(ZRESULT code, TCHAR *buf,unsigned int len);// FormatZipMessage - given an error code, formats it as a string.// It returns the length of the error message. If buf/len points// to a real buffer, then it also writes as much as possible into there.// These are the result codes:#define ZR_OK 0x00000000 // nb. the pseudo-code zr-recent is never returned,#define ZR_RECENT 0x00000001 // but can be passed to FormatZipMessage.// The following come from general system stuff (e.g. files not openable)#define ZR_GENMASK 0x0000FF00#define ZR_NODUPH 0x00000100 // couldn't duplicate the handle#define ZR_NOFILE 0x00000200 // couldn't create/open the file#define ZR_NOALLOC 0x00000300 // failed to allocate some resource#define ZR_WRITE 0x00000400 // a general error writing to the file#define ZR_NOTFOUND 0x00000500 // couldn't find that file in the zip#define ZR_MORE 0x00000600 // there's still more data to be unzipped#define ZR_CORRUPT 0x00000700 // the zipfile is corrupt or not a zipfile#define ZR_READ 0x00000800 // a general error reading the file// The following come from mistakes on the part of the caller#define ZR_CALLERMASK 0x00FF0000#define ZR_ARGS 0x00010000 // general mistake with the arguments#define ZR_NOTMMAP 0x00020000 // tried to ZipGetMemory, but that only works on mmap zipfiles, which yours wasn't#define ZR_MEMSIZE 0x00030000 // the memory size is too small#define ZR_FAILED 0x00040000 // the thing was already failed when you called this function#define ZR_ENDED 0x00050000 // the zip creation has already been closed#define ZR_MISSIZE 0x00060000 // the indicated input file size turned out mistaken#define ZR_PARTIALUNZ 0x00070000 // the file had already been partially unzipped#define ZR_ZMODE 0x00080000 // tried to mix creating/opening a zip// The following come from bugs within the zip library itself#define ZR_BUGMASK 0xFF000000#define ZR_NOTINITED 0x01000000 // initialisation didn't work#define ZR_SEEK 0x02000000 // trying to seek in an unseekable file#define ZR_NOCHANGE 0x04000000 // changed its mind on storage, but not allowed#define ZR_FLATE 0x05000000 // an internal error in the de/inflation code// e.g.//// (1) Traditional use, creating a zipfile from existing files// HZIP hz = CreateZip("c:\\simple1.zip",0);// ZipAdd(hz,"znsimple.bmp", "c:\\simple.bmp");// ZipAdd(hz,"znsimple.txt", "c:\\simple.txt");// CloseZip(hz);//// (2) Memory use, creating an auto-allocated mem-based zip file from various sources// 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);// ... meanwhile DWORD WINAPI ThreadFunc(void *dat)// { HANDLE hwrite = (HANDLE)dat;// char buf[1000]={17};// DWORD writ; WriteFile(hwrite,buf,1000,&writ,NULL);// CloseHandle(hwrite);// return 0;// }// // 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);// DWORD writ; WriteFile(hfz,zbuf,zlen,&writ,NULL);// CloseHandle(hfz);// CloseZip(hz);//// (3) Handle use, for file handles and pipes// 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);// ... meanwhile DWORD WINAPI ZipReceiverThread(void *dat)// { HANDLE hread = (HANDLE)dat;// char buf[1000];// while (true)// { DWORD red; ReadFile(hread,buf,1000,&red,NULL);// // ... and do something with this zip data we're receiving// if (red==0) break;// }// CloseHandle(hread);// return 0;// }// Now we indulge in a little skullduggery so that the code works whether// the user has included just zip or both zip and unzip.// Idea: if header files for both zip and unzip are present, then presumably// the cpp files for zip and unzip are both present, so we will call// one or the other of them based on a dynamic choice. If the header file// for only one is present, then we will bind to that particular one.ZRESULT CloseZipZ(HZIP hz);unsigned int FormatZipMessageZ(ZRESULT code, char *buf,unsigned int len);bool IsZipHandleZ(HZIP hz);#ifdef _unzip_H#undef CloseZip#define CloseZip(hz) (IsZipHandleZ(hz)?CloseZipZ(hz):CloseZipU(hz))#else#define CloseZip CloseZipZ#define FormatZipMessage FormatZipMessageZ#endif#endif