| 1 | /* unzip.c -- IO on .zip files using zlib |
| 2 | Version 0.15 beta, Mar 19th, 1998, |
| 3 | |
| 4 | Read unzip.h for more info |
| 5 | */ |
| 6 | |
| 7 | #include "wx/setup.h" |
| 8 | |
| 9 | #if wxUSE_ZLIB && wxUSE_ZIPSTREAM |
| 10 | |
| 11 | #include <stdio.h> |
| 12 | #include <stdlib.h> |
| 13 | #include <string.h> |
| 14 | #include "zlib.h" |
| 15 | #include "unzip.h" |
| 16 | |
| 17 | #ifdef STDC |
| 18 | # include <stddef.h> |
| 19 | # include <string.h> |
| 20 | # include <stdlib.h> |
| 21 | #endif |
| 22 | #ifdef NO_ERRNO_H |
| 23 | extern int errno; |
| 24 | #else |
| 25 | # include <errno.h> |
| 26 | #endif |
| 27 | |
| 28 | |
| 29 | #ifndef local |
| 30 | # define local static |
| 31 | #endif |
| 32 | /* compile with -Dlocal if your debugger can't find static symbols */ |
| 33 | |
| 34 | |
| 35 | |
| 36 | #if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) && \ |
| 37 | !defined(CASESENSITIVITYDEFAULT_NO) |
| 38 | #define CASESENSITIVITYDEFAULT_NO |
| 39 | #endif |
| 40 | |
| 41 | |
| 42 | #ifndef UNZ_BUFSIZE |
| 43 | #define UNZ_BUFSIZE (16384) |
| 44 | #endif |
| 45 | |
| 46 | #ifndef UNZ_MAXFILENAMEINZIP |
| 47 | #define UNZ_MAXFILENAMEINZIP (256) |
| 48 | #endif |
| 49 | |
| 50 | #ifndef ALLOC |
| 51 | # define ALLOC(size) (malloc(size)) |
| 52 | #endif |
| 53 | #ifndef TRYFREE |
| 54 | # define TRYFREE(p) {if (p) free(p);} |
| 55 | #endif |
| 56 | |
| 57 | #define SIZECENTRALDIRITEM (0x2e) |
| 58 | #define SIZEZIPLOCALHEADER (0x1e) |
| 59 | |
| 60 | |
| 61 | /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */ |
| 62 | |
| 63 | #ifndef SEEK_CUR |
| 64 | #define SEEK_CUR 1 |
| 65 | #endif |
| 66 | |
| 67 | #ifndef SEEK_END |
| 68 | #define SEEK_END 2 |
| 69 | #endif |
| 70 | |
| 71 | #ifndef SEEK_SET |
| 72 | #define SEEK_SET 0 |
| 73 | #endif |
| 74 | |
| 75 | const char unz_copyright[] = |
| 76 | " unzip 0.15 Copyright 1998 Gilles Vollant "; |
| 77 | |
| 78 | /* unz_file_info_interntal contain internal info about a file in zipfile*/ |
| 79 | typedef struct unz_file_info_internal_s |
| 80 | { |
| 81 | uLong offset_curfile;/* relative offset of local header 4 bytes */ |
| 82 | } unz_file_info_internal; |
| 83 | |
| 84 | |
| 85 | /* file_in_zip_read_info_s contain internal information about a file in zipfile, |
| 86 | when reading and decompress it */ |
| 87 | typedef struct |
| 88 | { |
| 89 | char *read_buffer; /* internal buffer for compressed data */ |
| 90 | z_stream stream; /* zLib stream structure for inflate */ |
| 91 | |
| 92 | uLong pos_in_zipfile; /* position in byte on the zipfile, for fseek*/ |
| 93 | uLong stream_initialised; /* flag set if stream structure is initialised*/ |
| 94 | |
| 95 | uLong offset_local_extrafield;/* offset of the local extra field */ |
| 96 | uInt size_local_extrafield;/* size of the local extra field */ |
| 97 | uLong pos_local_extrafield; /* position in the local extra field in read*/ |
| 98 | |
| 99 | uLong crc32; /* crc32 of all data uncompressed */ |
| 100 | uLong crc32_wait; /* crc32 we must obtain after decompress all */ |
| 101 | uLong rest_read_compressed; /* number of byte to be decompressed */ |
| 102 | uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/ |
| 103 | FILE* file; /* io structore of the zipfile */ |
| 104 | uLong compression_method; /* compression method (0==store) */ |
| 105 | uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/ |
| 106 | } file_in_zip_read_info_s; |
| 107 | |
| 108 | |
| 109 | /* unz_s contain internal information about the zipfile |
| 110 | */ |
| 111 | typedef struct |
| 112 | { |
| 113 | FILE* file; /* io structore of the zipfile */ |
| 114 | unz_global_info gi; /* public global information */ |
| 115 | uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/ |
| 116 | uLong num_file; /* number of the current file in the zipfile*/ |
| 117 | uLong pos_in_central_dir; /* pos of the current file in the central dir*/ |
| 118 | uLong current_file_ok; /* flag about the usability of the current file*/ |
| 119 | uLong central_pos; /* position of the beginning of the central dir*/ |
| 120 | |
| 121 | uLong size_central_dir; /* size of the central directory */ |
| 122 | uLong offset_central_dir; /* offset of start of central directory with |
| 123 | respect to the starting disk number */ |
| 124 | |
| 125 | unz_file_info cur_file_info; /* public info about the current file in zip*/ |
| 126 | unz_file_info_internal cur_file_info_internal; /* private info about it*/ |
| 127 | file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current |
| 128 | file if we are decompressing it */ |
| 129 | } unz_s; |
| 130 | |
| 131 | |
| 132 | /* =========================================================================== |
| 133 | Read a byte from a gz_stream; update next_in and avail_in. Return EOF |
| 134 | for end of file. |
| 135 | IN assertion: the stream s has been sucessfully opened for reading. |
| 136 | */ |
| 137 | |
| 138 | |
| 139 | local int unzlocal_getByte(fin,pi) |
| 140 | FILE *fin; |
| 141 | int *pi; |
| 142 | { |
| 143 | unsigned char c; |
| 144 | int err = fread(&c, 1, 1, fin); |
| 145 | if (err==1) |
| 146 | { |
| 147 | *pi = (int)c; |
| 148 | return UNZ_OK; |
| 149 | } |
| 150 | else |
| 151 | { |
| 152 | if (ferror(fin)) |
| 153 | return UNZ_ERRNO; |
| 154 | else |
| 155 | return UNZ_EOF; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | |
| 160 | /* =========================================================================== |
| 161 | Reads a long in LSB order from the given gz_stream. Sets |
| 162 | */ |
| 163 | local int unzlocal_getShort (fin,pX) |
| 164 | FILE* fin; |
| 165 | uLong *pX; |
| 166 | { |
| 167 | uLong x ; |
| 168 | int i; |
| 169 | int err; |
| 170 | |
| 171 | err = unzlocal_getByte(fin,&i); |
| 172 | x = (uLong)i; |
| 173 | |
| 174 | if (err==UNZ_OK) |
| 175 | err = unzlocal_getByte(fin,&i); |
| 176 | x += ((uLong)i)<<8; |
| 177 | |
| 178 | if (err==UNZ_OK) |
| 179 | *pX = x; |
| 180 | else |
| 181 | *pX = 0; |
| 182 | return err; |
| 183 | } |
| 184 | |
| 185 | local int unzlocal_getLong (fin,pX) |
| 186 | FILE* fin; |
| 187 | uLong *pX; |
| 188 | { |
| 189 | uLong x ; |
| 190 | int i; |
| 191 | int err; |
| 192 | |
| 193 | err = unzlocal_getByte(fin,&i); |
| 194 | x = (uLong)i; |
| 195 | |
| 196 | if (err==UNZ_OK) |
| 197 | err = unzlocal_getByte(fin,&i); |
| 198 | x += ((uLong)i)<<8; |
| 199 | |
| 200 | if (err==UNZ_OK) |
| 201 | err = unzlocal_getByte(fin,&i); |
| 202 | x += ((uLong)i)<<16; |
| 203 | |
| 204 | if (err==UNZ_OK) |
| 205 | err = unzlocal_getByte(fin,&i); |
| 206 | x += ((uLong)i)<<24; |
| 207 | |
| 208 | if (err==UNZ_OK) |
| 209 | *pX = x; |
| 210 | else |
| 211 | *pX = 0; |
| 212 | return err; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | /* My own strcmpi / strcasecmp */ |
| 217 | local int strcmpcasenosensitive_internal (fileName1,fileName2) |
| 218 | const char* fileName1; |
| 219 | const char* fileName2; |
| 220 | { |
| 221 | for (;;) |
| 222 | { |
| 223 | char c1=*(fileName1++); |
| 224 | char c2=*(fileName2++); |
| 225 | if ((c1>='a') && (c1<='z')) |
| 226 | c1 -= 0x20; |
| 227 | if ((c2>='a') && (c2<='z')) |
| 228 | c2 -= 0x20; |
| 229 | if (c1=='\0') |
| 230 | return ((c2=='\0') ? 0 : -1); |
| 231 | if (c2=='\0') |
| 232 | return 1; |
| 233 | if (c1<c2) |
| 234 | return -1; |
| 235 | if (c1>c2) |
| 236 | return 1; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | |
| 241 | #ifdef CASESENSITIVITYDEFAULT_NO |
| 242 | #define CASESENSITIVITYDEFAULTVALUE 2 |
| 243 | #else |
| 244 | #define CASESENSITIVITYDEFAULTVALUE 1 |
| 245 | #endif |
| 246 | |
| 247 | #ifndef STRCMPCASENOSENTIVEFUNCTION |
| 248 | #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal |
| 249 | #endif |
| 250 | |
| 251 | /* |
| 252 | Compare two filename (fileName1,fileName2). |
| 253 | If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp) |
| 254 | If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi |
| 255 | or strcasecmp) |
| 256 | If iCaseSenisivity = 0, case sensitivity is defaut of your operating system |
| 257 | (like 1 on Unix, 2 on Windows) |
| 258 | |
| 259 | */ |
| 260 | extern int ZEXPORT unzStringFileNameCompare (fileName1,fileName2,iCaseSensitivity) |
| 261 | const char* fileName1; |
| 262 | const char* fileName2; |
| 263 | int iCaseSensitivity; |
| 264 | { |
| 265 | if (iCaseSensitivity==0) |
| 266 | iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE; |
| 267 | |
| 268 | if (iCaseSensitivity==1) |
| 269 | return strcmp(fileName1,fileName2); |
| 270 | |
| 271 | return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2); |
| 272 | } |
| 273 | |
| 274 | #define BUFREADCOMMENT (0x400) |
| 275 | |
| 276 | /* |
| 277 | Locate the Central directory of a zipfile (at the end, just before |
| 278 | the global comment) |
| 279 | */ |
| 280 | local uLong unzlocal_SearchCentralDir(fin) |
| 281 | FILE *fin; |
| 282 | { |
| 283 | unsigned char* buf; |
| 284 | uLong uSizeFile; |
| 285 | uLong uBackRead; |
| 286 | uLong uMaxBack=0xffff; /* maximum size of global comment */ |
| 287 | uLong uPosFound=0; |
| 288 | |
| 289 | if (fseek(fin,0,SEEK_END) != 0) |
| 290 | return 0; |
| 291 | |
| 292 | |
| 293 | uSizeFile = ftell( fin ); |
| 294 | |
| 295 | if (uMaxBack>uSizeFile) |
| 296 | uMaxBack = uSizeFile; |
| 297 | |
| 298 | buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4); |
| 299 | if (buf==NULL) |
| 300 | return 0; |
| 301 | |
| 302 | uBackRead = 4; |
| 303 | while (uBackRead<uMaxBack) |
| 304 | { |
| 305 | uLong uReadSize,uReadPos ; |
| 306 | int i; |
| 307 | if (uBackRead+BUFREADCOMMENT>uMaxBack) |
| 308 | uBackRead = uMaxBack; |
| 309 | else |
| 310 | uBackRead+=BUFREADCOMMENT; |
| 311 | uReadPos = uSizeFile-uBackRead ; |
| 312 | |
| 313 | uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ? |
| 314 | (BUFREADCOMMENT+4) : (uSizeFile-uReadPos); |
| 315 | if (fseek(fin,uReadPos,SEEK_SET)!=0) |
| 316 | break; |
| 317 | |
| 318 | if (fread(buf,(uInt)uReadSize,1,fin)!=1) |
| 319 | break; |
| 320 | |
| 321 | for (i=(int)uReadSize-3; (i--)>0;) |
| 322 | if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && |
| 323 | ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06)) |
| 324 | { |
| 325 | uPosFound = uReadPos+i; |
| 326 | break; |
| 327 | } |
| 328 | |
| 329 | if (uPosFound!=0) |
| 330 | break; |
| 331 | } |
| 332 | TRYFREE(buf); |
| 333 | return uPosFound; |
| 334 | } |
| 335 | |
| 336 | /* |
| 337 | Open a Zip file. path contain the full pathname (by example, |
| 338 | on a Windows NT computer "c:\\test\\zlib109.zip" or on an Unix computer |
| 339 | "zlib/zlib109.zip". |
| 340 | If the zipfile cannot be opened (file don't exist or in not valid), the |
| 341 | return value is NULL. |
| 342 | Else, the return value is a unzFile Handle, usable with other function |
| 343 | of this unzip package. |
| 344 | */ |
| 345 | extern unzFile ZEXPORT unzOpen (path) |
| 346 | const char *path; |
| 347 | { |
| 348 | unz_s us; |
| 349 | unz_s *s; |
| 350 | uLong central_pos,uL; |
| 351 | FILE * fin ; |
| 352 | |
| 353 | uLong number_disk; /* number of the current dist, used for |
| 354 | spaning ZIP, unsupported, always 0*/ |
| 355 | uLong number_disk_with_CD; /* number the the disk with central dir, used |
| 356 | for spaning ZIP, unsupported, always 0*/ |
| 357 | uLong number_entry_CD; /* total number of entries in |
| 358 | the central dir |
| 359 | (same than number_entry on nospan) */ |
| 360 | |
| 361 | int err=UNZ_OK; |
| 362 | |
| 363 | if (unz_copyright[0]!=' ') |
| 364 | return NULL; |
| 365 | |
| 366 | fin=fopen(path,"rb"); |
| 367 | if (fin==NULL) |
| 368 | return NULL; |
| 369 | |
| 370 | central_pos = unzlocal_SearchCentralDir(fin); |
| 371 | if (central_pos==0) |
| 372 | err=UNZ_ERRNO; |
| 373 | |
| 374 | if (fseek(fin,central_pos,SEEK_SET)!=0) |
| 375 | err=UNZ_ERRNO; |
| 376 | |
| 377 | /* the signature, already checked */ |
| 378 | if (unzlocal_getLong(fin,&uL)!=UNZ_OK) |
| 379 | err=UNZ_ERRNO; |
| 380 | |
| 381 | /* number of this disk */ |
| 382 | if (unzlocal_getShort(fin,&number_disk)!=UNZ_OK) |
| 383 | err=UNZ_ERRNO; |
| 384 | |
| 385 | /* number of the disk with the start of the central directory */ |
| 386 | if (unzlocal_getShort(fin,&number_disk_with_CD)!=UNZ_OK) |
| 387 | err=UNZ_ERRNO; |
| 388 | |
| 389 | /* total number of entries in the central dir on this disk */ |
| 390 | if (unzlocal_getShort(fin,&us.gi.number_entry)!=UNZ_OK) |
| 391 | err=UNZ_ERRNO; |
| 392 | |
| 393 | /* total number of entries in the central dir */ |
| 394 | if (unzlocal_getShort(fin,&number_entry_CD)!=UNZ_OK) |
| 395 | err=UNZ_ERRNO; |
| 396 | |
| 397 | if ((number_entry_CD!=us.gi.number_entry) || |
| 398 | (number_disk_with_CD!=0) || |
| 399 | (number_disk!=0)) |
| 400 | err=UNZ_BADZIPFILE; |
| 401 | |
| 402 | /* size of the central directory */ |
| 403 | if (unzlocal_getLong(fin,&us.size_central_dir)!=UNZ_OK) |
| 404 | err=UNZ_ERRNO; |
| 405 | |
| 406 | /* offset of start of central directory with respect to the |
| 407 | starting disk number */ |
| 408 | if (unzlocal_getLong(fin,&us.offset_central_dir)!=UNZ_OK) |
| 409 | err=UNZ_ERRNO; |
| 410 | |
| 411 | /* zipfile comment length */ |
| 412 | if (unzlocal_getShort(fin,&us.gi.size_comment)!=UNZ_OK) |
| 413 | err=UNZ_ERRNO; |
| 414 | |
| 415 | if ((central_pos<us.offset_central_dir+us.size_central_dir) && |
| 416 | (err==UNZ_OK)) |
| 417 | err=UNZ_BADZIPFILE; |
| 418 | |
| 419 | if (err!=UNZ_OK) |
| 420 | { |
| 421 | fclose(fin); |
| 422 | return NULL; |
| 423 | } |
| 424 | |
| 425 | us.file=fin; |
| 426 | us.byte_before_the_zipfile = central_pos - |
| 427 | (us.offset_central_dir+us.size_central_dir); |
| 428 | us.central_pos = central_pos; |
| 429 | us.pfile_in_zip_read = NULL; |
| 430 | |
| 431 | |
| 432 | s=(unz_s*)ALLOC(sizeof(unz_s)); |
| 433 | *s=us; |
| 434 | unzGoToFirstFile((unzFile)s); |
| 435 | return (unzFile)s; |
| 436 | } |
| 437 | |
| 438 | |
| 439 | /* |
| 440 | Close a ZipFile opened with unzipOpen. |
| 441 | If there is files inside the .Zip opened with unzipOpenCurrentFile (see later), |
| 442 | these files MUST be closed with unzipCloseCurrentFile before call unzipClose. |
| 443 | return UNZ_OK if there is no problem. */ |
| 444 | extern int ZEXPORT unzClose (file) |
| 445 | unzFile file; |
| 446 | { |
| 447 | unz_s* s; |
| 448 | if (file==NULL) |
| 449 | return UNZ_PARAMERROR; |
| 450 | s=(unz_s*)file; |
| 451 | |
| 452 | if (s->pfile_in_zip_read!=NULL) |
| 453 | unzCloseCurrentFile(file); |
| 454 | |
| 455 | fclose(s->file); |
| 456 | TRYFREE(s); |
| 457 | return UNZ_OK; |
| 458 | } |
| 459 | |
| 460 | |
| 461 | /* |
| 462 | Write info about the ZipFile in the *pglobal_info structure. |
| 463 | No preparation of the structure is needed |
| 464 | return UNZ_OK if there is no problem. */ |
| 465 | extern int ZEXPORT unzGetGlobalInfo (file,pglobal_info) |
| 466 | unzFile file; |
| 467 | unz_global_info *pglobal_info; |
| 468 | { |
| 469 | unz_s* s; |
| 470 | if (file==NULL) |
| 471 | return UNZ_PARAMERROR; |
| 472 | s=(unz_s*)file; |
| 473 | *pglobal_info=s->gi; |
| 474 | return UNZ_OK; |
| 475 | } |
| 476 | |
| 477 | |
| 478 | /* |
| 479 | Translate date/time from Dos format to tm_unz (readable more easilty) |
| 480 | */ |
| 481 | local void unzlocal_DosDateToTmuDate (ulDosDate, ptm) |
| 482 | uLong ulDosDate; |
| 483 | tm_unz* ptm; |
| 484 | { |
| 485 | uLong uDate; |
| 486 | uDate = (uLong)(ulDosDate>>16); |
| 487 | ptm->tm_mday = (uInt)(uDate&0x1f) ; |
| 488 | ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1) ; |
| 489 | ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ; |
| 490 | |
| 491 | ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800); |
| 492 | ptm->tm_min = (uInt) ((ulDosDate&0x7E0)/0x20) ; |
| 493 | ptm->tm_sec = (uInt) (2*(ulDosDate&0x1f)) ; |
| 494 | } |
| 495 | |
| 496 | /* |
| 497 | Get Info about the current file in the zipfile, with internal only info |
| 498 | */ |
| 499 | local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file, |
| 500 | unz_file_info *pfile_info, |
| 501 | unz_file_info_internal |
| 502 | *pfile_info_internal, |
| 503 | char *szFileName, |
| 504 | uLong fileNameBufferSize, |
| 505 | void *extraField, |
| 506 | uLong extraFieldBufferSize, |
| 507 | char *szComment, |
| 508 | uLong commentBufferSize)); |
| 509 | |
| 510 | local int unzlocal_GetCurrentFileInfoInternal (file, |
| 511 | pfile_info, |
| 512 | pfile_info_internal, |
| 513 | szFileName, fileNameBufferSize, |
| 514 | extraField, extraFieldBufferSize, |
| 515 | szComment, commentBufferSize) |
| 516 | unzFile file; |
| 517 | unz_file_info *pfile_info; |
| 518 | unz_file_info_internal *pfile_info_internal; |
| 519 | char *szFileName; |
| 520 | uLong fileNameBufferSize; |
| 521 | void *extraField; |
| 522 | uLong extraFieldBufferSize; |
| 523 | char *szComment; |
| 524 | uLong commentBufferSize; |
| 525 | { |
| 526 | unz_s* s; |
| 527 | unz_file_info file_info; |
| 528 | unz_file_info_internal file_info_internal; |
| 529 | int err=UNZ_OK; |
| 530 | uLong uMagic; |
| 531 | long lSeek=0; |
| 532 | |
| 533 | if (file==NULL) |
| 534 | return UNZ_PARAMERROR; |
| 535 | s=(unz_s*)file; |
| 536 | if (fseek(s->file,s->pos_in_central_dir+s->byte_before_the_zipfile,SEEK_SET)!=0) |
| 537 | err=UNZ_ERRNO; |
| 538 | |
| 539 | |
| 540 | /* we check the magic */ |
| 541 | if (err==UNZ_OK) |
| 542 | if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK) |
| 543 | err=UNZ_ERRNO; |
| 544 | else if (uMagic!=0x02014b50) |
| 545 | err=UNZ_BADZIPFILE; |
| 546 | |
| 547 | if (unzlocal_getShort(s->file,&file_info.version) != UNZ_OK) |
| 548 | err=UNZ_ERRNO; |
| 549 | |
| 550 | if (unzlocal_getShort(s->file,&file_info.version_needed) != UNZ_OK) |
| 551 | err=UNZ_ERRNO; |
| 552 | |
| 553 | if (unzlocal_getShort(s->file,&file_info.flag) != UNZ_OK) |
| 554 | err=UNZ_ERRNO; |
| 555 | |
| 556 | if (unzlocal_getShort(s->file,&file_info.compression_method) != UNZ_OK) |
| 557 | err=UNZ_ERRNO; |
| 558 | |
| 559 | if (unzlocal_getLong(s->file,&file_info.dosDate) != UNZ_OK) |
| 560 | err=UNZ_ERRNO; |
| 561 | |
| 562 | unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date); |
| 563 | |
| 564 | if (unzlocal_getLong(s->file,&file_info.crc) != UNZ_OK) |
| 565 | err=UNZ_ERRNO; |
| 566 | |
| 567 | if (unzlocal_getLong(s->file,&file_info.compressed_size) != UNZ_OK) |
| 568 | err=UNZ_ERRNO; |
| 569 | |
| 570 | if (unzlocal_getLong(s->file,&file_info.uncompressed_size) != UNZ_OK) |
| 571 | err=UNZ_ERRNO; |
| 572 | |
| 573 | if (unzlocal_getShort(s->file,&file_info.size_filename) != UNZ_OK) |
| 574 | err=UNZ_ERRNO; |
| 575 | |
| 576 | if (unzlocal_getShort(s->file,&file_info.size_file_extra) != UNZ_OK) |
| 577 | err=UNZ_ERRNO; |
| 578 | |
| 579 | if (unzlocal_getShort(s->file,&file_info.size_file_comment) != UNZ_OK) |
| 580 | err=UNZ_ERRNO; |
| 581 | |
| 582 | if (unzlocal_getShort(s->file,&file_info.disk_num_start) != UNZ_OK) |
| 583 | err=UNZ_ERRNO; |
| 584 | |
| 585 | if (unzlocal_getShort(s->file,&file_info.internal_fa) != UNZ_OK) |
| 586 | err=UNZ_ERRNO; |
| 587 | |
| 588 | if (unzlocal_getLong(s->file,&file_info.external_fa) != UNZ_OK) |
| 589 | err=UNZ_ERRNO; |
| 590 | |
| 591 | if (unzlocal_getLong(s->file,&file_info_internal.offset_curfile) != UNZ_OK) |
| 592 | err=UNZ_ERRNO; |
| 593 | |
| 594 | lSeek+=file_info.size_filename; |
| 595 | if ((err==UNZ_OK) && (szFileName!=NULL)) |
| 596 | { |
| 597 | uLong uSizeRead ; |
| 598 | if (file_info.size_filename<fileNameBufferSize) |
| 599 | { |
| 600 | *(szFileName+file_info.size_filename)='\0'; |
| 601 | uSizeRead = file_info.size_filename; |
| 602 | } |
| 603 | else |
| 604 | uSizeRead = fileNameBufferSize; |
| 605 | |
| 606 | if ((file_info.size_filename>0) && (fileNameBufferSize>0)) |
| 607 | if (fread(szFileName,(uInt)uSizeRead,1,s->file)!=1) |
| 608 | err=UNZ_ERRNO; |
| 609 | lSeek -= uSizeRead; |
| 610 | } |
| 611 | |
| 612 | |
| 613 | if ((err==UNZ_OK) && (extraField!=NULL)) |
| 614 | { |
| 615 | uLong uSizeRead ; |
| 616 | if (file_info.size_file_extra<extraFieldBufferSize) |
| 617 | uSizeRead = file_info.size_file_extra; |
| 618 | else |
| 619 | uSizeRead = extraFieldBufferSize; |
| 620 | |
| 621 | if (lSeek!=0) |
| 622 | if (fseek(s->file,lSeek,SEEK_CUR)==0) |
| 623 | lSeek=0; |
| 624 | else |
| 625 | err=UNZ_ERRNO; |
| 626 | if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0)) |
| 627 | if (fread(extraField,(uInt)uSizeRead,1,s->file)!=1) |
| 628 | err=UNZ_ERRNO; |
| 629 | lSeek += file_info.size_file_extra - uSizeRead; |
| 630 | } |
| 631 | else |
| 632 | lSeek+=file_info.size_file_extra; |
| 633 | |
| 634 | |
| 635 | if ((err==UNZ_OK) && (szComment!=NULL)) |
| 636 | { |
| 637 | uLong uSizeRead ; |
| 638 | if (file_info.size_file_comment<commentBufferSize) |
| 639 | { |
| 640 | *(szComment+file_info.size_file_comment)='\0'; |
| 641 | uSizeRead = file_info.size_file_comment; |
| 642 | } |
| 643 | else |
| 644 | uSizeRead = commentBufferSize; |
| 645 | |
| 646 | if (lSeek!=0) |
| 647 | if (fseek(s->file,lSeek,SEEK_CUR)==0) |
| 648 | lSeek=0; |
| 649 | else |
| 650 | err=UNZ_ERRNO; |
| 651 | if ((file_info.size_file_comment>0) && (commentBufferSize>0)) |
| 652 | if (fread(szComment,(uInt)uSizeRead,1,s->file)!=1) |
| 653 | err=UNZ_ERRNO; |
| 654 | lSeek+=file_info.size_file_comment - uSizeRead; |
| 655 | } |
| 656 | else |
| 657 | lSeek+=file_info.size_file_comment; |
| 658 | |
| 659 | if ((err==UNZ_OK) && (pfile_info!=NULL)) |
| 660 | *pfile_info=file_info; |
| 661 | |
| 662 | if ((err==UNZ_OK) && (pfile_info_internal!=NULL)) |
| 663 | *pfile_info_internal=file_info_internal; |
| 664 | |
| 665 | return err; |
| 666 | } |
| 667 | |
| 668 | |
| 669 | |
| 670 | /* |
| 671 | Write info about the ZipFile in the *pglobal_info structure. |
| 672 | No preparation of the structure is needed |
| 673 | return UNZ_OK if there is no problem. |
| 674 | */ |
| 675 | extern int ZEXPORT unzGetCurrentFileInfo (file, |
| 676 | pfile_info, |
| 677 | szFileName, fileNameBufferSize, |
| 678 | extraField, extraFieldBufferSize, |
| 679 | szComment, commentBufferSize) |
| 680 | unzFile file; |
| 681 | unz_file_info *pfile_info; |
| 682 | char *szFileName; |
| 683 | uLong fileNameBufferSize; |
| 684 | void *extraField; |
| 685 | uLong extraFieldBufferSize; |
| 686 | char *szComment; |
| 687 | uLong commentBufferSize; |
| 688 | { |
| 689 | return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL, |
| 690 | szFileName,fileNameBufferSize, |
| 691 | extraField,extraFieldBufferSize, |
| 692 | szComment,commentBufferSize); |
| 693 | } |
| 694 | |
| 695 | /* |
| 696 | Set the current file of the zipfile to the first file. |
| 697 | return UNZ_OK if there is no problem |
| 698 | */ |
| 699 | extern int ZEXPORT unzGoToFirstFile (file) |
| 700 | unzFile file; |
| 701 | { |
| 702 | int err=UNZ_OK; |
| 703 | unz_s* s; |
| 704 | if (file==NULL) |
| 705 | return UNZ_PARAMERROR; |
| 706 | s=(unz_s*)file; |
| 707 | s->pos_in_central_dir=s->offset_central_dir; |
| 708 | s->num_file=0; |
| 709 | err=unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info, |
| 710 | &s->cur_file_info_internal, |
| 711 | NULL,0,NULL,0,NULL,0); |
| 712 | s->current_file_ok = (err == UNZ_OK); |
| 713 | return err; |
| 714 | } |
| 715 | |
| 716 | |
| 717 | /* |
| 718 | Set the current file of the zipfile to the next file. |
| 719 | return UNZ_OK if there is no problem |
| 720 | return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest. |
| 721 | */ |
| 722 | extern int ZEXPORT unzGoToNextFile (file) |
| 723 | unzFile file; |
| 724 | { |
| 725 | unz_s* s; |
| 726 | int err; |
| 727 | |
| 728 | if (file==NULL) |
| 729 | return UNZ_PARAMERROR; |
| 730 | s=(unz_s*)file; |
| 731 | if (!s->current_file_ok) |
| 732 | return UNZ_END_OF_LIST_OF_FILE; |
| 733 | if (s->num_file+1==s->gi.number_entry) |
| 734 | return UNZ_END_OF_LIST_OF_FILE; |
| 735 | |
| 736 | s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename + |
| 737 | s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ; |
| 738 | s->num_file++; |
| 739 | err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info, |
| 740 | &s->cur_file_info_internal, |
| 741 | NULL,0,NULL,0,NULL,0); |
| 742 | s->current_file_ok = (err == UNZ_OK); |
| 743 | return err; |
| 744 | } |
| 745 | |
| 746 | |
| 747 | /* |
| 748 | Try locate the file szFileName in the zipfile. |
| 749 | For the iCaseSensitivity signification, see unzipStringFileNameCompare |
| 750 | |
| 751 | return value : |
| 752 | UNZ_OK if the file is found. It becomes the current file. |
| 753 | UNZ_END_OF_LIST_OF_FILE if the file is not found |
| 754 | */ |
| 755 | extern int ZEXPORT unzLocateFile (file, szFileName, iCaseSensitivity) |
| 756 | unzFile file; |
| 757 | const char *szFileName; |
| 758 | int iCaseSensitivity; |
| 759 | { |
| 760 | unz_s* s; |
| 761 | int err; |
| 762 | |
| 763 | |
| 764 | uLong num_fileSaved; |
| 765 | uLong pos_in_central_dirSaved; |
| 766 | |
| 767 | |
| 768 | if (file==NULL) |
| 769 | return UNZ_PARAMERROR; |
| 770 | |
| 771 | if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP) |
| 772 | return UNZ_PARAMERROR; |
| 773 | |
| 774 | s=(unz_s*)file; |
| 775 | if (!s->current_file_ok) |
| 776 | return UNZ_END_OF_LIST_OF_FILE; |
| 777 | |
| 778 | num_fileSaved = s->num_file; |
| 779 | pos_in_central_dirSaved = s->pos_in_central_dir; |
| 780 | |
| 781 | err = unzGoToFirstFile(file); |
| 782 | |
| 783 | while (err == UNZ_OK) |
| 784 | { |
| 785 | char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1]; |
| 786 | unzGetCurrentFileInfo(file,NULL, |
| 787 | szCurrentFileName,sizeof(szCurrentFileName)-1, |
| 788 | NULL,0,NULL,0); |
| 789 | if (unzStringFileNameCompare(szCurrentFileName, |
| 790 | szFileName,iCaseSensitivity)==0) |
| 791 | return UNZ_OK; |
| 792 | err = unzGoToNextFile(file); |
| 793 | } |
| 794 | |
| 795 | s->num_file = num_fileSaved ; |
| 796 | s->pos_in_central_dir = pos_in_central_dirSaved ; |
| 797 | return err; |
| 798 | } |
| 799 | |
| 800 | |
| 801 | /* |
| 802 | Read the local header of the current zipfile |
| 803 | Check the coherency of the local header and info in the end of central |
| 804 | directory about this file |
| 805 | store in *piSizeVar the size of extra info in local header |
| 806 | (filename and size of extra field data) |
| 807 | */ |
| 808 | local int unzlocal_CheckCurrentFileCoherencyHeader (s,piSizeVar, |
| 809 | poffset_local_extrafield, |
| 810 | psize_local_extrafield) |
| 811 | unz_s* s; |
| 812 | uInt* piSizeVar; |
| 813 | uLong *poffset_local_extrafield; |
| 814 | uInt *psize_local_extrafield; |
| 815 | { |
| 816 | uLong uMagic,uData,uFlags; |
| 817 | uLong size_filename; |
| 818 | uLong size_extra_field; |
| 819 | int err=UNZ_OK; |
| 820 | |
| 821 | *piSizeVar = 0; |
| 822 | *poffset_local_extrafield = 0; |
| 823 | *psize_local_extrafield = 0; |
| 824 | |
| 825 | if (fseek(s->file,s->cur_file_info_internal.offset_curfile + |
| 826 | s->byte_before_the_zipfile,SEEK_SET)!=0) |
| 827 | return UNZ_ERRNO; |
| 828 | |
| 829 | |
| 830 | if (err==UNZ_OK) |
| 831 | if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK) |
| 832 | err=UNZ_ERRNO; |
| 833 | else if (uMagic!=0x04034b50) |
| 834 | err=UNZ_BADZIPFILE; |
| 835 | |
| 836 | if (unzlocal_getShort(s->file,&uData) != UNZ_OK) |
| 837 | err=UNZ_ERRNO; |
| 838 | /* |
| 839 | else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion)) |
| 840 | err=UNZ_BADZIPFILE; |
| 841 | */ |
| 842 | if (unzlocal_getShort(s->file,&uFlags) != UNZ_OK) |
| 843 | err=UNZ_ERRNO; |
| 844 | |
| 845 | if (unzlocal_getShort(s->file,&uData) != UNZ_OK) |
| 846 | err=UNZ_ERRNO; |
| 847 | else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method)) |
| 848 | err=UNZ_BADZIPFILE; |
| 849 | |
| 850 | if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) && |
| 851 | (s->cur_file_info.compression_method!=Z_DEFLATED)) |
| 852 | err=UNZ_BADZIPFILE; |
| 853 | |
| 854 | if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* date/time */ |
| 855 | err=UNZ_ERRNO; |
| 856 | |
| 857 | if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* crc */ |
| 858 | err=UNZ_ERRNO; |
| 859 | else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) && |
| 860 | ((uFlags & 8)==0)) |
| 861 | err=UNZ_BADZIPFILE; |
| 862 | |
| 863 | if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* size compr */ |
| 864 | err=UNZ_ERRNO; |
| 865 | else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) && |
| 866 | ((uFlags & 8)==0)) |
| 867 | err=UNZ_BADZIPFILE; |
| 868 | |
| 869 | if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* size uncompr */ |
| 870 | err=UNZ_ERRNO; |
| 871 | else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) && |
| 872 | ((uFlags & 8)==0)) |
| 873 | err=UNZ_BADZIPFILE; |
| 874 | |
| 875 | |
| 876 | if (unzlocal_getShort(s->file,&size_filename) != UNZ_OK) |
| 877 | err=UNZ_ERRNO; |
| 878 | else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename)) |
| 879 | err=UNZ_BADZIPFILE; |
| 880 | |
| 881 | *piSizeVar += (uInt)size_filename; |
| 882 | |
| 883 | if (unzlocal_getShort(s->file,&size_extra_field) != UNZ_OK) |
| 884 | err=UNZ_ERRNO; |
| 885 | *poffset_local_extrafield= s->cur_file_info_internal.offset_curfile + |
| 886 | SIZEZIPLOCALHEADER + size_filename; |
| 887 | *psize_local_extrafield = (uInt)size_extra_field; |
| 888 | |
| 889 | *piSizeVar += (uInt)size_extra_field; |
| 890 | |
| 891 | return err; |
| 892 | } |
| 893 | |
| 894 | /* |
| 895 | Open for reading data the current file in the zipfile. |
| 896 | If there is no error and the file is opened, the return value is UNZ_OK. |
| 897 | */ |
| 898 | extern int ZEXPORT unzOpenCurrentFile (file) |
| 899 | unzFile file; |
| 900 | { |
| 901 | int err=UNZ_OK; |
| 902 | int Store; |
| 903 | uInt iSizeVar; |
| 904 | unz_s* s; |
| 905 | file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 906 | uLong offset_local_extrafield; /* offset of the local extra field */ |
| 907 | uInt size_local_extrafield; /* size of the local extra field */ |
| 908 | |
| 909 | if (file==NULL) |
| 910 | return UNZ_PARAMERROR; |
| 911 | s=(unz_s*)file; |
| 912 | if (!s->current_file_ok) |
| 913 | return UNZ_PARAMERROR; |
| 914 | |
| 915 | if (s->pfile_in_zip_read != NULL) |
| 916 | unzCloseCurrentFile(file); |
| 917 | |
| 918 | if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar, |
| 919 | &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK) |
| 920 | return UNZ_BADZIPFILE; |
| 921 | |
| 922 | pfile_in_zip_read_info = (file_in_zip_read_info_s*) |
| 923 | ALLOC(sizeof(file_in_zip_read_info_s)); |
| 924 | if (pfile_in_zip_read_info==NULL) |
| 925 | return UNZ_INTERNALERROR; |
| 926 | |
| 927 | pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE); |
| 928 | pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield; |
| 929 | pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield; |
| 930 | pfile_in_zip_read_info->pos_local_extrafield=0; |
| 931 | |
| 932 | if (pfile_in_zip_read_info->read_buffer==NULL) |
| 933 | { |
| 934 | TRYFREE(pfile_in_zip_read_info); |
| 935 | return UNZ_INTERNALERROR; |
| 936 | } |
| 937 | |
| 938 | pfile_in_zip_read_info->stream_initialised=0; |
| 939 | |
| 940 | if ((s->cur_file_info.compression_method!=0) && |
| 941 | (s->cur_file_info.compression_method!=Z_DEFLATED)) |
| 942 | err=UNZ_BADZIPFILE; |
| 943 | Store = s->cur_file_info.compression_method==0; |
| 944 | |
| 945 | pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc; |
| 946 | pfile_in_zip_read_info->crc32=0; |
| 947 | pfile_in_zip_read_info->compression_method = |
| 948 | s->cur_file_info.compression_method; |
| 949 | pfile_in_zip_read_info->file=s->file; |
| 950 | pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile; |
| 951 | |
| 952 | pfile_in_zip_read_info->stream.total_out = 0; |
| 953 | |
| 954 | if (!Store) |
| 955 | { |
| 956 | pfile_in_zip_read_info->stream.zalloc = (alloc_func)0; |
| 957 | pfile_in_zip_read_info->stream.zfree = (free_func)0; |
| 958 | pfile_in_zip_read_info->stream.opaque = (voidpf)0; |
| 959 | |
| 960 | err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS); |
| 961 | if (err == Z_OK) |
| 962 | pfile_in_zip_read_info->stream_initialised=1; |
| 963 | /* windowBits is passed < 0 to tell that there is no zlib header. |
| 964 | * Note that in this case inflate *requires* an extra "dummy" byte |
| 965 | * after the compressed stream in order to complete decompression and |
| 966 | * return Z_STREAM_END. |
| 967 | * In unzip, i don't wait absolutely Z_STREAM_END because I known the |
| 968 | * size of both compressed and uncompressed data |
| 969 | */ |
| 970 | } |
| 971 | pfile_in_zip_read_info->rest_read_compressed = |
| 972 | s->cur_file_info.compressed_size ; |
| 973 | pfile_in_zip_read_info->rest_read_uncompressed = |
| 974 | s->cur_file_info.uncompressed_size ; |
| 975 | |
| 976 | |
| 977 | pfile_in_zip_read_info->pos_in_zipfile = |
| 978 | s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + |
| 979 | iSizeVar; |
| 980 | |
| 981 | pfile_in_zip_read_info->stream.avail_in = (uInt)0; |
| 982 | |
| 983 | |
| 984 | s->pfile_in_zip_read = pfile_in_zip_read_info; |
| 985 | return UNZ_OK; |
| 986 | } |
| 987 | |
| 988 | |
| 989 | /* |
| 990 | Read bytes from the current file. |
| 991 | buf contain buffer where data must be copied |
| 992 | len the size of buf. |
| 993 | |
| 994 | return the number of byte copied if somes bytes are copied |
| 995 | return 0 if the end of file was reached |
| 996 | return <0 with error code if there is an error |
| 997 | (UNZ_ERRNO for IO error, or zLib error for uncompress error) |
| 998 | */ |
| 999 | extern int ZEXPORT unzReadCurrentFile (file, buf, len) |
| 1000 | unzFile file; |
| 1001 | voidp buf; |
| 1002 | unsigned len; |
| 1003 | { |
| 1004 | int err=UNZ_OK; |
| 1005 | uInt iRead = 0; |
| 1006 | unz_s* s; |
| 1007 | file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1008 | if (file==NULL) |
| 1009 | return UNZ_PARAMERROR; |
| 1010 | s=(unz_s*)file; |
| 1011 | pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1012 | |
| 1013 | if (pfile_in_zip_read_info==NULL) |
| 1014 | return UNZ_PARAMERROR; |
| 1015 | |
| 1016 | |
| 1017 | if ((pfile_in_zip_read_info->read_buffer == NULL)) |
| 1018 | return UNZ_END_OF_LIST_OF_FILE; |
| 1019 | if (len==0) |
| 1020 | return 0; |
| 1021 | |
| 1022 | pfile_in_zip_read_info->stream.next_out = (Bytef*)buf; |
| 1023 | |
| 1024 | pfile_in_zip_read_info->stream.avail_out = (uInt)len; |
| 1025 | |
| 1026 | if (len>pfile_in_zip_read_info->rest_read_uncompressed) |
| 1027 | pfile_in_zip_read_info->stream.avail_out = |
| 1028 | (uInt)pfile_in_zip_read_info->rest_read_uncompressed; |
| 1029 | |
| 1030 | while (pfile_in_zip_read_info->stream.avail_out>0) |
| 1031 | { |
| 1032 | if ((pfile_in_zip_read_info->stream.avail_in==0) && |
| 1033 | (pfile_in_zip_read_info->rest_read_compressed>0)) |
| 1034 | { |
| 1035 | uInt uReadThis = UNZ_BUFSIZE; |
| 1036 | if (pfile_in_zip_read_info->rest_read_compressed<uReadThis) |
| 1037 | uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed; |
| 1038 | if (uReadThis == 0) |
| 1039 | return UNZ_EOF; |
| 1040 | if (fseek(pfile_in_zip_read_info->file, |
| 1041 | pfile_in_zip_read_info->pos_in_zipfile + |
| 1042 | pfile_in_zip_read_info->byte_before_the_zipfile,SEEK_SET)!=0) |
| 1043 | return UNZ_ERRNO; |
| 1044 | if (fread(pfile_in_zip_read_info->read_buffer,uReadThis,1, |
| 1045 | pfile_in_zip_read_info->file)!=1) |
| 1046 | return UNZ_ERRNO; |
| 1047 | pfile_in_zip_read_info->pos_in_zipfile += uReadThis; |
| 1048 | |
| 1049 | pfile_in_zip_read_info->rest_read_compressed-=uReadThis; |
| 1050 | |
| 1051 | pfile_in_zip_read_info->stream.next_in = |
| 1052 | (Bytef*)pfile_in_zip_read_info->read_buffer; |
| 1053 | pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis; |
| 1054 | } |
| 1055 | |
| 1056 | if (pfile_in_zip_read_info->compression_method==0) |
| 1057 | { |
| 1058 | uInt uDoCopy,i ; |
| 1059 | if (pfile_in_zip_read_info->stream.avail_out < |
| 1060 | pfile_in_zip_read_info->stream.avail_in) |
| 1061 | uDoCopy = pfile_in_zip_read_info->stream.avail_out ; |
| 1062 | else |
| 1063 | uDoCopy = pfile_in_zip_read_info->stream.avail_in ; |
| 1064 | |
| 1065 | for (i=0;i<uDoCopy;i++) |
| 1066 | *(pfile_in_zip_read_info->stream.next_out+i) = |
| 1067 | *(pfile_in_zip_read_info->stream.next_in+i); |
| 1068 | |
| 1069 | pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32, |
| 1070 | pfile_in_zip_read_info->stream.next_out, |
| 1071 | uDoCopy); |
| 1072 | pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy; |
| 1073 | pfile_in_zip_read_info->stream.avail_in -= uDoCopy; |
| 1074 | pfile_in_zip_read_info->stream.avail_out -= uDoCopy; |
| 1075 | pfile_in_zip_read_info->stream.next_out += uDoCopy; |
| 1076 | pfile_in_zip_read_info->stream.next_in += uDoCopy; |
| 1077 | pfile_in_zip_read_info->stream.total_out += uDoCopy; |
| 1078 | iRead += uDoCopy; |
| 1079 | } |
| 1080 | else |
| 1081 | { |
| 1082 | uLong uTotalOutBefore,uTotalOutAfter; |
| 1083 | const Bytef *bufBefore; |
| 1084 | uLong uOutThis; |
| 1085 | int flush=Z_SYNC_FLUSH; |
| 1086 | |
| 1087 | uTotalOutBefore = pfile_in_zip_read_info->stream.total_out; |
| 1088 | bufBefore = pfile_in_zip_read_info->stream.next_out; |
| 1089 | |
| 1090 | /* |
| 1091 | if ((pfile_in_zip_read_info->rest_read_uncompressed == |
| 1092 | pfile_in_zip_read_info->stream.avail_out) && |
| 1093 | (pfile_in_zip_read_info->rest_read_compressed == 0)) |
| 1094 | flush = Z_FINISH; |
| 1095 | */ |
| 1096 | err=inflate(&pfile_in_zip_read_info->stream,flush); |
| 1097 | |
| 1098 | uTotalOutAfter = pfile_in_zip_read_info->stream.total_out; |
| 1099 | uOutThis = uTotalOutAfter-uTotalOutBefore; |
| 1100 | |
| 1101 | pfile_in_zip_read_info->crc32 = |
| 1102 | crc32(pfile_in_zip_read_info->crc32,bufBefore, |
| 1103 | (uInt)(uOutThis)); |
| 1104 | |
| 1105 | pfile_in_zip_read_info->rest_read_uncompressed -= |
| 1106 | uOutThis; |
| 1107 | |
| 1108 | iRead += (uInt)(uTotalOutAfter - uTotalOutBefore); |
| 1109 | |
| 1110 | if (err==Z_STREAM_END) |
| 1111 | return (iRead==0) ? UNZ_EOF : iRead; |
| 1112 | if (err!=Z_OK) |
| 1113 | break; |
| 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | if (err==Z_OK) |
| 1118 | return iRead; |
| 1119 | return err; |
| 1120 | } |
| 1121 | |
| 1122 | |
| 1123 | /* |
| 1124 | Give the current position in uncompressed data |
| 1125 | */ |
| 1126 | extern z_off_t ZEXPORT unztell (file) |
| 1127 | unzFile file; |
| 1128 | { |
| 1129 | unz_s* s; |
| 1130 | file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1131 | if (file==NULL) |
| 1132 | return UNZ_PARAMERROR; |
| 1133 | s=(unz_s*)file; |
| 1134 | pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1135 | |
| 1136 | if (pfile_in_zip_read_info==NULL) |
| 1137 | return UNZ_PARAMERROR; |
| 1138 | |
| 1139 | return (z_off_t)pfile_in_zip_read_info->stream.total_out; |
| 1140 | } |
| 1141 | |
| 1142 | |
| 1143 | /* |
| 1144 | return 1 if the end of file was reached, 0 elsewhere |
| 1145 | */ |
| 1146 | extern int ZEXPORT unzeof (file) |
| 1147 | unzFile file; |
| 1148 | { |
| 1149 | unz_s* s; |
| 1150 | file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1151 | if (file==NULL) |
| 1152 | return UNZ_PARAMERROR; |
| 1153 | s=(unz_s*)file; |
| 1154 | pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1155 | |
| 1156 | if (pfile_in_zip_read_info==NULL) |
| 1157 | return UNZ_PARAMERROR; |
| 1158 | |
| 1159 | if (pfile_in_zip_read_info->rest_read_uncompressed == 0) |
| 1160 | return 1; |
| 1161 | else |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | |
| 1166 | |
| 1167 | /* |
| 1168 | Read extra field from the current file (opened by unzOpenCurrentFile) |
| 1169 | This is the local-header version of the extra field (sometimes, there is |
| 1170 | more info in the local-header version than in the central-header) |
| 1171 | |
| 1172 | if buf==NULL, it return the size of the local extra field that can be read |
| 1173 | |
| 1174 | if buf!=NULL, len is the size of the buffer, the extra header is copied in |
| 1175 | buf. |
| 1176 | the return value is the number of bytes copied in buf, or (if <0) |
| 1177 | the error code |
| 1178 | */ |
| 1179 | extern int ZEXPORT unzGetLocalExtrafield (file,buf,len) |
| 1180 | unzFile file; |
| 1181 | voidp buf; |
| 1182 | unsigned len; |
| 1183 | { |
| 1184 | unz_s* s; |
| 1185 | file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1186 | uInt read_now; |
| 1187 | uLong size_to_read; |
| 1188 | |
| 1189 | if (file==NULL) |
| 1190 | return UNZ_PARAMERROR; |
| 1191 | s=(unz_s*)file; |
| 1192 | pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1193 | |
| 1194 | if (pfile_in_zip_read_info==NULL) |
| 1195 | return UNZ_PARAMERROR; |
| 1196 | |
| 1197 | size_to_read = (pfile_in_zip_read_info->size_local_extrafield - |
| 1198 | pfile_in_zip_read_info->pos_local_extrafield); |
| 1199 | |
| 1200 | if (buf==NULL) |
| 1201 | return (int)size_to_read; |
| 1202 | |
| 1203 | if (len>size_to_read) |
| 1204 | read_now = (uInt)size_to_read; |
| 1205 | else |
| 1206 | read_now = (uInt)len ; |
| 1207 | |
| 1208 | if (read_now==0) |
| 1209 | return 0; |
| 1210 | |
| 1211 | if (fseek(pfile_in_zip_read_info->file, |
| 1212 | pfile_in_zip_read_info->offset_local_extrafield + |
| 1213 | pfile_in_zip_read_info->pos_local_extrafield,SEEK_SET)!=0) |
| 1214 | return UNZ_ERRNO; |
| 1215 | |
| 1216 | if (fread(buf,(uInt)size_to_read,1,pfile_in_zip_read_info->file)!=1) |
| 1217 | return UNZ_ERRNO; |
| 1218 | |
| 1219 | return (int)read_now; |
| 1220 | } |
| 1221 | |
| 1222 | /* |
| 1223 | Close the file in zip opened with unzipOpenCurrentFile |
| 1224 | Return UNZ_CRCERROR if all the file was read but the CRC is not good |
| 1225 | */ |
| 1226 | extern int ZEXPORT unzCloseCurrentFile (file) |
| 1227 | unzFile file; |
| 1228 | { |
| 1229 | int err=UNZ_OK; |
| 1230 | |
| 1231 | unz_s* s; |
| 1232 | file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1233 | if (file==NULL) |
| 1234 | return UNZ_PARAMERROR; |
| 1235 | s=(unz_s*)file; |
| 1236 | pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1237 | |
| 1238 | if (pfile_in_zip_read_info==NULL) |
| 1239 | return UNZ_PARAMERROR; |
| 1240 | |
| 1241 | |
| 1242 | if (pfile_in_zip_read_info->rest_read_uncompressed == 0) |
| 1243 | { |
| 1244 | if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait) |
| 1245 | err=UNZ_CRCERROR; |
| 1246 | } |
| 1247 | |
| 1248 | |
| 1249 | TRYFREE(pfile_in_zip_read_info->read_buffer); |
| 1250 | pfile_in_zip_read_info->read_buffer = NULL; |
| 1251 | if (pfile_in_zip_read_info->stream_initialised) |
| 1252 | inflateEnd(&pfile_in_zip_read_info->stream); |
| 1253 | |
| 1254 | pfile_in_zip_read_info->stream_initialised = 0; |
| 1255 | TRYFREE(pfile_in_zip_read_info); |
| 1256 | |
| 1257 | s->pfile_in_zip_read=NULL; |
| 1258 | |
| 1259 | return err; |
| 1260 | } |
| 1261 | |
| 1262 | |
| 1263 | /* |
| 1264 | Get the global comment string of the ZipFile, in the szComment buffer. |
| 1265 | uSizeBuf is the size of the szComment buffer. |
| 1266 | return the number of byte copied or an error code <0 |
| 1267 | */ |
| 1268 | extern int ZEXPORT unzGetGlobalComment (file, szComment, uSizeBuf) |
| 1269 | unzFile file; |
| 1270 | char *szComment; |
| 1271 | uLong uSizeBuf; |
| 1272 | { |
| 1273 | int err=UNZ_OK; |
| 1274 | unz_s* s; |
| 1275 | uLong uReadThis ; |
| 1276 | if (file==NULL) |
| 1277 | return UNZ_PARAMERROR; |
| 1278 | s=(unz_s*)file; |
| 1279 | |
| 1280 | uReadThis = uSizeBuf; |
| 1281 | if (uReadThis>s->gi.size_comment) |
| 1282 | uReadThis = s->gi.size_comment; |
| 1283 | |
| 1284 | if (fseek(s->file,s->central_pos+22,SEEK_SET)!=0) |
| 1285 | return UNZ_ERRNO; |
| 1286 | |
| 1287 | if (uReadThis>0) |
| 1288 | { |
| 1289 | *szComment='\0'; |
| 1290 | if (fread(szComment,(uInt)uReadThis,1,s->file)!=1) |
| 1291 | return UNZ_ERRNO; |
| 1292 | } |
| 1293 | |
| 1294 | if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment)) |
| 1295 | *(szComment+s->gi.size_comment)='\0'; |
| 1296 | return (int)uReadThis; |
| 1297 | } |
| 1298 | |
| 1299 | #else |
| 1300 | |
| 1301 | // the file shouldn't be empty, som compilers don't like it |
| 1302 | static const int dummyVariableInUnzip = 17; |
| 1303 | |
| 1304 | #endif // wxUSE_ZLIB && wxUSE_ZIPSTREAM |