1 2 // UNZIPPING functions -- for unzipping. 3 // This file is a repackaged form of extracts from the zlib code available 4 // at www.gzip.org/zlib, by Jean-Loup Gailly and Mark Adler. The original 5 // copyright notice may be found in unzip.cpp. The repackaging was done 6 // by Lucian Wischik to simplify and extend its use in Windows/C++. Also 7 // encryption and unicode filenames have been added. 8 9 10 #ifndef _unzip_H 11 #define _unzip_H 12 // 13 14 #ifdef ZIP_STD 15 #include <stdio.h> 16 #include <string.h> 17 #include <stdlib.h> 18 #include <time.h> 19 #ifdef _MSC_VER 20 #include <sys/utime.h> // microsoft puts it here 21 #else 22 #include <utime.h> 23 #endif 24 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) 25 #include <direct.h> 26 #define lumkdir(t) (_mkdir(t)) 27 #else 28 #include <unistd.h> 29 #define lumkdir(t) (mkdir(t,0755)) 30 #endif 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 // 34 typedef unsigned short WORD; 35 #define _tcslen strlen 36 #define _tcsicmp stricmp 37 #define _tcsncpy strncpy 38 #define _tcsstr strstr 39 #define INVALID_HANDLE_VALUE 0 40 #ifndef _T 41 #define _T(s) s 42 #endif 43 #ifndef S_IWUSR 44 #define S_IWUSR 0000200 45 #define S_ISDIR(m) (((m) & _S_IFMT) == _S_IFDIR) 46 #define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG) 47 #endif 48 // 49 #else 50 #include <windows.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <tchar.h> 55 #endif 56 57 #ifdef ZIP_STD 58 #include <time.h> 59 #define DECLARE_HANDLE(name) struct name##__ { int unused; }; typedef struct name##__ *name 60 #ifndef MAX_PATH 61 #define MAX_PATH 1024 62 #endif 63 typedef unsigned long DWORD; 64 typedef char TCHAR; 65 typedef FILE* HANDLE; 66 typedef time_t FILETIME; 67 #endif 68 69 70 #ifndef _zip_H 71 DECLARE_HANDLE(HZIP); 72 #endif 73 // An HZIP identifies a zip file that has been opened 74 75 typedef DWORD ZRESULT; 76 // return codes from any of the zip functions. Listed later. 77 78 typedef struct 79 { int index; // index of this file within the zip 80 TCHAR name[MAX_PATH]; // filename within the zip 81 DWORD attr; // attributes, as in GetFileAttributes. 82 FILETIME atime,ctime,mtime;// access, create, modify filetimes 83 long comp_size; // sizes of item, compressed and uncompressed. These 84 long unc_size; // may be -1 if not yet known (e.g. being streamed in) 85 } ZIPENTRY; 86 87 HZIP OpenZip(const TCHAR *fn, const char *password); 88 HZIP OpenZip(void *z,unsigned int len, const char *password); 89 HZIP OpenZipHandle(HANDLE h, const char *password); 90 // OpenZip - opens a zip file and returns a handle with which you can 91 // subsequently examine its contents. You can open a zip file from: 92 // from a pipe: OpenZipHandle(hpipe_read,0); 93 // from a file (by handle): OpenZipHandle(hfile,0); 94 // from a file (by name): OpenZip("c:\\test.zip","password"); 95 // from a memory block: OpenZip(bufstart, buflen,0); 96 // If the file is opened through a pipe, then items may only be 97 // accessed in increasing order, and an item may only be unzipped once, 98 // although GetZipItem can be called immediately before and after unzipping 99 // it. If it's opened in any other way, then full random access is possible. 100 // Note: pipe input is not yet implemented. 101 // Note: zip passwords are ascii, not unicode. 102 // Note: for windows-ce, you cannot close the handle until after CloseZip. 103 // but for real windows, the zip makes its own copy of your handle, so you 104 // can close yours anytime. 105 106 ZRESULT GetZipItem(HZIP hz, int index, ZIPENTRY *ze); 107 // GetZipItem - call this to get information about an item in the zip. 108 // If index is -1 and the file wasn't opened through a pipe, 109 // then it returns information about the whole zipfile 110 // (and in particular ze.index returns the number of index items). 111 // Note: the item might be a directory (ze.attr & FILE_ATTRIBUTE_DIRECTORY) 112 // See below for notes on what happens when you unzip such an item. 113 // Note: if you are opening the zip through a pipe, then random access 114 // is not possible and GetZipItem(-1) fails and you can't discover the number 115 // of items except by calling GetZipItem on each one of them in turn, 116 // starting at 0, until eventually the call fails. Also, in the event that 117 // you are opening through a pipe and the zip was itself created into a pipe, 118 // then then comp_size and sometimes unc_size as well may not be known until 119 // after the item has been unzipped. 120 121 ZRESULT FindZipItem(HZIP hz, const TCHAR *name, bool ic, int *index, ZIPENTRY *ze); 122 // FindZipItem - finds an item by name. ic means 'insensitive to case'. 123 // It returns the index of the item, and returns information about it. 124 // If nothing was found, then index is set to -1 and the function returns 125 // an error code. 126 127 ZRESULT UnzipItem(HZIP hz, int index, const TCHAR *fn); 128 ZRESULT UnzipItem(HZIP hz, int index, void *z,unsigned int len); 129 ZRESULT UnzipItemHandle(HZIP hz, int index, HANDLE h); 130 // UnzipItem - given an index to an item, unzips it. You can unzip to: 131 // to a pipe: UnzipItemHandle(hz,i, hpipe_write); 132 // to a file (by handle): UnzipItemHandle(hz,i, hfile); 133 // to a file (by name): UnzipItem(hz,i, ze.name); 134 // to a memory block: UnzipItem(hz,i, buf,buflen); 135 // In the final case, if the buffer isn't large enough to hold it all, 136 // then the return code indicates that more is yet to come. If it was 137 // large enough, and you want to know precisely how big, GetZipItem. 138 // Note: zip files are normally stored with relative pathnames. If you 139 // unzip with ZIP_FILENAME a relative pathname then the item gets created 140 // relative to the current directory - it first ensures that all necessary 141 // subdirectories have been created. Also, the item may itself be a directory. 142 // If you unzip a directory with ZIP_FILENAME, then the directory gets created. 143 // If you unzip it to a handle or a memory block, then nothing gets created 144 // and it emits 0 bytes. 145 ZRESULT SetUnzipBaseDir(HZIP hz, const TCHAR *dir); 146 // if unzipping to a filename, and it's a relative filename, then it will be relative to here. 147 // (defaults to current-directory). 148 149 150 ZRESULT CloseZip(HZIP hz); 151 // CloseZip - the zip handle must be closed with this function. 152 153 unsigned int FormatZipMessage(ZRESULT code, TCHAR *buf,unsigned int len); 154 // FormatZipMessage - given an error code, formats it as a string. 155 // It returns the length of the error message. If buf/len points 156 // to a real buffer, then it also writes as much as possible into there. 157 158 159 // These are the result codes: 160 #define ZR_OK 0x00000000 // nb. the pseudo-code zr-recent is never returned, 161 #define ZR_RECENT 0x00000001 // but can be passed to FormatZipMessage. 162 // The following come from general system stuff (e.g. files not openable) 163 #define ZR_GENMASK 0x0000FF00 164 #define ZR_NODUPH 0x00000100 // couldn't duplicate the handle 165 #define ZR_NOFILE 0x00000200 // couldn't create/open the file 166 #define ZR_NOALLOC 0x00000300 // failed to allocate some resource 167 #define ZR_WRITE 0x00000400 // a general error writing to the file 168 #define ZR_NOTFOUND 0x00000500 // couldn't find that file in the zip 169 #define ZR_MORE 0x00000600 // there's still more data to be unzipped 170 #define ZR_CORRUPT 0x00000700 // the zipfile is corrupt or not a zipfile 171 #define ZR_READ 0x00000800 // a general error reading the file 172 #define ZR_PASSWORD 0x00001000 // we didn't get the right password to unzip the file 173 // The following come from mistakes on the part of the caller 174 #define ZR_CALLERMASK 0x00FF0000 175 #define ZR_ARGS 0x00010000 // general mistake with the arguments 176 #define ZR_NOTMMAP 0x00020000 // tried to ZipGetMemory, but that only works on mmap zipfiles, which yours wasn't 177 #define ZR_MEMSIZE 0x00030000 // the memory size is too small 178 #define ZR_FAILED 0x00040000 // the thing was already failed when you called this function 179 #define ZR_ENDED 0x00050000 // the zip creation has already been closed 180 #define ZR_MISSIZE 0x00060000 // the indicated input file size turned out mistaken 181 #define ZR_PARTIALUNZ 0x00070000 // the file had already been partially unzipped 182 #define ZR_ZMODE 0x00080000 // tried to mix creating/opening a zip 183 // The following come from bugs within the zip library itself 184 #define ZR_BUGMASK 0xFF000000 185 #define ZR_NOTINITED 0x01000000 // initialisation didn't work 186 #define ZR_SEEK 0x02000000 // trying to seek in an unseekable file 187 #define ZR_NOCHANGE 0x04000000 // changed its mind on storage, but not allowed 188 #define ZR_FLATE 0x05000000 // an internal error in the de/inflation code 189 190 191 192 193 194 // e.g. 195 // 196 // SetCurrentDirectory("c:\\docs\\stuff"); 197 // HZIP hz = OpenZip("c:\\stuff.zip",0); 198 // ZIPENTRY ze; GetZipItem(hz,-1,&ze); int numitems=ze.index; 199 // for (int i=0; i<numitems; i++) 200 // { GetZipItem(hz,i,&ze); 201 // UnzipItem(hz,i,ze.name); 202 // } 203 // CloseZip(hz); 204 // 205 // 206 // HRSRC hrsrc = FindResource(hInstance,MAKEINTRESOURCE(1),RT_RCDATA); 207 // HANDLE hglob = LoadResource(hInstance,hrsrc); 208 // void *zipbuf=LockResource(hglob); 209 // unsigned int ziplen=SizeofResource(hInstance,hrsrc); 210 // HZIP hz = OpenZip(zipbuf, ziplen, 0); 211 // - unzip to a membuffer - 212 // ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",true,&i,&ze); 213 // char *ibuf = new char[ze.unc_size]; 214 // UnzipItem(hz,i, ibuf, ze.unc_size); 215 // delete[] ibuf; 216 // - unzip to a fixed membuff - 217 // ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",true,&i,&ze); 218 // char ibuf[1024]; ZRESULT zr=ZR_MORE; unsigned long totsize=0; 219 // while (zr==ZR_MORE) 220 // { zr = UnzipItem(hz,i, ibuf,1024); 221 // unsigned long bufsize=1024; if (zr==ZR_OK) bufsize=ze.unc_size-totsize; 222 // totsize+=bufsize; 223 // } 224 // - unzip to a pipe - 225 // HANDLE hwrite; HANDLE hthread=CreateWavReaderThread(&hwrite); 226 // int i; ZIPENTRY ze; FindZipItem(hz,"sound.wav",true,&i,&ze); 227 // UnzipItemHandle(hz,i, hwrite); 228 // CloseHandle(hwrite); 229 // WaitForSingleObject(hthread,INFINITE); 230 // CloseHandle(hwrite); CloseHandle(hthread); 231 // - finished - 232 // CloseZip(hz); 233 // // note: no need to free resources obtained through Find/Load/LockResource 234 // 235 // 236 // SetCurrentDirectory("c:\\docs\\pipedzipstuff"); 237 // HANDLE hread,hwrite; CreatePipe(&hread,&hwrite,0,0); 238 // CreateZipWriterThread(hwrite); 239 // HZIP hz = OpenZipHandle(hread,0); 240 // for (int i=0; ; i++) 241 // { ZIPENTRY ze; 242 // ZRESULT zr=GetZipItem(hz,i,&ze); if (zr!=ZR_OK) break; // no more 243 // UnzipItem(hz,i, ze.name); 244 // } 245 // CloseZip(hz); 246 // 247 // 248 249 250 251 252 // Now we indulge in a little skullduggery so that the code works whether 253 // the user has included just zip or both zip and unzip. 254 // Idea: if header files for both zip and unzip are present, then presumably 255 // the cpp files for zip and unzip are both present, so we will call 256 // one or the other of them based on a dynamic choice. If the header file 257 // for only one is present, then we will bind to that particular one. 258 ZRESULT CloseZipU(HZIP hz); 259 unsigned int FormatZipMessageU(ZRESULT code, TCHAR *buf,unsigned int len); 260 bool IsZipHandleU(HZIP hz); 261 #ifdef _zip_H 262 #undef CloseZip 263 #define CloseZip(hz) (IsZipHandleU(hz)?CloseZipU(hz):CloseZipZ(hz)) 264 #else 265 #define CloseZip CloseZipU 266 #define FormatZipMessage FormatZipMessageU 267 #endif 268 269 270 271 #endif // _unzip_H 272