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| 1 /* unzip.c -- IO for uncompress .zip files using zlib |
| 2 Version 1.01e, February 12th, 2005 |
| 3 |
| 4 Copyright (C) 1998-2005 Gilles Vollant |
| 5 |
| 6 Read unzip.h for more info |
| 7 */ |
| 8 |
| 9 /* Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced i
n terms of |
| 10 compatibility with older software. The following is from the original crypt.c. C
ode |
| 11 woven in by Terry Thorsen 1/2003. |
| 12 */ |
| 13 /* |
| 14 Copyright (c) 1990-2000 Info-ZIP. All rights reserved. |
| 15 |
| 16 See the accompanying file LICENSE, version 2000-Apr-09 or later |
| 17 (the contents of which are also included in zip.h) for terms of use. |
| 18 If, for some reason, all these files are missing, the Info-ZIP license |
| 19 also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html |
| 20 */ |
| 21 /* |
| 22 crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h] |
| 23 |
| 24 The encryption/decryption parts of this source code (as opposed to the |
| 25 non-echoing password parts) were originally written in Europe. The |
| 26 whole source package can be freely distributed, including from the USA. |
| 27 (Prior to January 2000, re-export from the US was a violation of US law.) |
| 28 */ |
| 29 |
| 30 /* |
| 31 This encryption code is a direct transcription of the algorithm from |
| 32 Roger Schlafly, described by Phil Katz in the file appnote.txt. This |
| 33 file (appnote.txt) is distributed with the PKZIP program (even in the |
| 34 version without encryption capabilities). |
| 35 */ |
| 36 |
| 37 |
| 38 #include <stdio.h> |
| 39 #include <stdlib.h> |
| 40 #include <string.h> |
| 41 #include "zlib.h" |
| 42 #include "unzip.h" |
| 43 |
| 44 #ifdef STDC |
| 45 # include <stddef.h> |
| 46 # include <string.h> |
| 47 # include <stdlib.h> |
| 48 #endif |
| 49 #ifdef NO_ERRNO_H |
| 50 extern int errno; |
| 51 #else |
| 52 # include <errno.h> |
| 53 #endif |
| 54 |
| 55 |
| 56 #ifndef local |
| 57 # define local static |
| 58 #endif |
| 59 /* compile with -Dlocal if your debugger can't find static symbols */ |
| 60 |
| 61 |
| 62 #ifndef CASESENSITIVITYDEFAULT_NO |
| 63 # if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) |
| 64 # define CASESENSITIVITYDEFAULT_NO |
| 65 # endif |
| 66 #endif |
| 67 |
| 68 |
| 69 #ifndef UNZ_BUFSIZE |
| 70 #define UNZ_BUFSIZE (16384) |
| 71 #endif |
| 72 |
| 73 #ifndef UNZ_MAXFILENAMEINZIP |
| 74 #define UNZ_MAXFILENAMEINZIP (256) |
| 75 #endif |
| 76 |
| 77 #ifndef ALLOC |
| 78 # define ALLOC(size) (malloc(size)) |
| 79 #endif |
| 80 #ifndef TRYFREE |
| 81 # define TRYFREE(p) {if (p) free(p);} |
| 82 #endif |
| 83 |
| 84 #define SIZECENTRALDIRITEM (0x2e) |
| 85 #define SIZEZIPLOCALHEADER (0x1e) |
| 86 |
| 87 |
| 88 |
| 89 |
| 90 const char unz_copyright[] = |
| 91 " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLi
bDll"; |
| 92 |
| 93 /* unz_file_info_interntal contain internal info about a file in zipfile*/ |
| 94 typedef struct unz_file_info_internal_s |
| 95 { |
| 96 uLong offset_curfile;/* relative offset of local header 4 bytes */ |
| 97 } unz_file_info_internal; |
| 98 |
| 99 |
| 100 /* file_in_zip_read_info_s contain internal information about a file in zipfile, |
| 101 when reading and decompress it */ |
| 102 typedef struct |
| 103 { |
| 104 char *read_buffer; /* internal buffer for compressed data */ |
| 105 z_stream stream; /* zLib stream structure for inflate */ |
| 106 |
| 107 uLong pos_in_zipfile; /* position in byte on the zipfile, for fseek*/ |
| 108 uLong stream_initialised; /* flag set if stream structure is initialised*/ |
| 109 |
| 110 uLong offset_local_extrafield;/* offset of the local extra field */ |
| 111 uInt size_local_extrafield;/* size of the local extra field */ |
| 112 uLong pos_local_extrafield; /* position in the local extra field in read*/ |
| 113 |
| 114 uLong crc32; /* crc32 of all data uncompressed */ |
| 115 uLong crc32_wait; /* crc32 we must obtain after decompress all */ |
| 116 uLong rest_read_compressed; /* number of byte to be decompressed */ |
| 117 uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/ |
| 118 zlib_filefunc_def z_filefunc; |
| 119 voidpf filestream; /* io structore of the zipfile */ |
| 120 uLong compression_method; /* compression method (0==store) */ |
| 121 uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/ |
| 122 int raw; |
| 123 } file_in_zip_read_info_s; |
| 124 |
| 125 |
| 126 /* unz_s contain internal information about the zipfile |
| 127 */ |
| 128 typedef struct |
| 129 { |
| 130 zlib_filefunc_def z_filefunc; |
| 131 voidpf filestream; /* io structore of the zipfile */ |
| 132 unz_global_info gi; /* public global information */ |
| 133 uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/ |
| 134 uLong num_file; /* number of the current file in the zipfile*/ |
| 135 uLong pos_in_central_dir; /* pos of the current file in the central dir*/ |
| 136 uLong current_file_ok; /* flag about the usability of the current file*
/ |
| 137 uLong central_pos; /* position of the beginning of the central dir*
/ |
| 138 |
| 139 uLong size_central_dir; /* size of the central directory */ |
| 140 uLong offset_central_dir; /* offset of start of central directory with |
| 141 respect to the starting disk number */ |
| 142 |
| 143 unz_file_info cur_file_info; /* public info about the current file in zip*/ |
| 144 unz_file_info_internal cur_file_info_internal; /* private info about it*/ |
| 145 file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current |
| 146 file if we are decompressing it */ |
| 147 int encrypted; |
| 148 # ifndef NOUNCRYPT |
| 149 unsigned long keys[3]; /* keys defining the pseudo-random sequence */ |
| 150 const unsigned long* pcrc_32_tab; |
| 151 # endif |
| 152 } unz_s; |
| 153 |
| 154 |
| 155 #ifndef NOUNCRYPT |
| 156 #include "crypt.h" |
| 157 #endif |
| 158 |
| 159 /* =========================================================================== |
| 160 Read a byte from a gz_stream; update next_in and avail_in. Return EOF |
| 161 for end of file. |
| 162 IN assertion: the stream s has been sucessfully opened for reading. |
| 163 */ |
| 164 |
| 165 |
| 166 local int unzlocal_getByte OF(( |
| 167 const zlib_filefunc_def* pzlib_filefunc_def, |
| 168 voidpf filestream, |
| 169 int *pi)); |
| 170 |
| 171 local int unzlocal_getByte(pzlib_filefunc_def,filestream,pi) |
| 172 const zlib_filefunc_def* pzlib_filefunc_def; |
| 173 voidpf filestream; |
| 174 int *pi; |
| 175 { |
| 176 unsigned char c; |
| 177 int err = (int)ZREAD(*pzlib_filefunc_def,filestream,&c,1); |
| 178 if (err==1) |
| 179 { |
| 180 *pi = (int)c; |
| 181 return UNZ_OK; |
| 182 } |
| 183 else |
| 184 { |
| 185 if (ZERROR(*pzlib_filefunc_def,filestream)) |
| 186 return UNZ_ERRNO; |
| 187 else |
| 188 return UNZ_EOF; |
| 189 } |
| 190 } |
| 191 |
| 192 |
| 193 /* =========================================================================== |
| 194 Reads a long in LSB order from the given gz_stream. Sets |
| 195 */ |
| 196 local int unzlocal_getShort OF(( |
| 197 const zlib_filefunc_def* pzlib_filefunc_def, |
| 198 voidpf filestream, |
| 199 uLong *pX)); |
| 200 |
| 201 local int unzlocal_getShort (pzlib_filefunc_def,filestream,pX) |
| 202 const zlib_filefunc_def* pzlib_filefunc_def; |
| 203 voidpf filestream; |
| 204 uLong *pX; |
| 205 { |
| 206 uLong x ; |
| 207 int i; |
| 208 int err; |
| 209 |
| 210 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| 211 x = (uLong)i; |
| 212 |
| 213 if (err==UNZ_OK) |
| 214 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| 215 x += ((uLong)i)<<8; |
| 216 |
| 217 if (err==UNZ_OK) |
| 218 *pX = x; |
| 219 else |
| 220 *pX = 0; |
| 221 return err; |
| 222 } |
| 223 |
| 224 local int unzlocal_getLong OF(( |
| 225 const zlib_filefunc_def* pzlib_filefunc_def, |
| 226 voidpf filestream, |
| 227 uLong *pX)); |
| 228 |
| 229 local int unzlocal_getLong (pzlib_filefunc_def,filestream,pX) |
| 230 const zlib_filefunc_def* pzlib_filefunc_def; |
| 231 voidpf filestream; |
| 232 uLong *pX; |
| 233 { |
| 234 uLong x ; |
| 235 int i; |
| 236 int err; |
| 237 |
| 238 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| 239 x = (uLong)i; |
| 240 |
| 241 if (err==UNZ_OK) |
| 242 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| 243 x += ((uLong)i)<<8; |
| 244 |
| 245 if (err==UNZ_OK) |
| 246 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| 247 x += ((uLong)i)<<16; |
| 248 |
| 249 if (err==UNZ_OK) |
| 250 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| 251 x += ((uLong)i)<<24; |
| 252 |
| 253 if (err==UNZ_OK) |
| 254 *pX = x; |
| 255 else |
| 256 *pX = 0; |
| 257 return err; |
| 258 } |
| 259 |
| 260 |
| 261 /* My own strcmpi / strcasecmp */ |
| 262 local int strcmpcasenosensitive_internal (fileName1,fileName2) |
| 263 const char* fileName1; |
| 264 const char* fileName2; |
| 265 { |
| 266 for (;;) |
| 267 { |
| 268 char c1=*(fileName1++); |
| 269 char c2=*(fileName2++); |
| 270 if ((c1>='a') && (c1<='z')) |
| 271 c1 -= 0x20; |
| 272 if ((c2>='a') && (c2<='z')) |
| 273 c2 -= 0x20; |
| 274 if (c1=='\0') |
| 275 return ((c2=='\0') ? 0 : -1); |
| 276 if (c2=='\0') |
| 277 return 1; |
| 278 if (c1<c2) |
| 279 return -1; |
| 280 if (c1>c2) |
| 281 return 1; |
| 282 } |
| 283 } |
| 284 |
| 285 |
| 286 #ifdef CASESENSITIVITYDEFAULT_NO |
| 287 #define CASESENSITIVITYDEFAULTVALUE 2 |
| 288 #else |
| 289 #define CASESENSITIVITYDEFAULTVALUE 1 |
| 290 #endif |
| 291 |
| 292 #ifndef STRCMPCASENOSENTIVEFUNCTION |
| 293 #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal |
| 294 #endif |
| 295 |
| 296 /* |
| 297 Compare two filename (fileName1,fileName2). |
| 298 If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp) |
| 299 If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi |
| 300 or strcasecmp) |
| 301 If iCaseSenisivity = 0, case sensitivity is defaut of your operating system |
| 302 (like 1 on Unix, 2 on Windows) |
| 303 |
| 304 */ |
| 305 extern int ZEXPORT unzStringFileNameCompare (fileName1,fileName2,iCaseSensitivit
y) |
| 306 const char* fileName1; |
| 307 const char* fileName2; |
| 308 int iCaseSensitivity; |
| 309 { |
| 310 if (iCaseSensitivity==0) |
| 311 iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE; |
| 312 |
| 313 if (iCaseSensitivity==1) |
| 314 return strcmp(fileName1,fileName2); |
| 315 |
| 316 return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2); |
| 317 } |
| 318 |
| 319 #ifndef BUFREADCOMMENT |
| 320 #define BUFREADCOMMENT (0x400) |
| 321 #endif |
| 322 |
| 323 /* |
| 324 Locate the Central directory of a zipfile (at the end, just before |
| 325 the global comment) |
| 326 */ |
| 327 local uLong unzlocal_SearchCentralDir OF(( |
| 328 const zlib_filefunc_def* pzlib_filefunc_def, |
| 329 voidpf filestream)); |
| 330 |
| 331 local uLong unzlocal_SearchCentralDir(pzlib_filefunc_def,filestream) |
| 332 const zlib_filefunc_def* pzlib_filefunc_def; |
| 333 voidpf filestream; |
| 334 { |
| 335 unsigned char* buf; |
| 336 uLong uSizeFile; |
| 337 uLong uBackRead; |
| 338 uLong uMaxBack=0xffff; /* maximum size of global comment */ |
| 339 uLong uPosFound=0; |
| 340 |
| 341 if (ZSEEK(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0) |
| 342 return 0; |
| 343 |
| 344 |
| 345 uSizeFile = ZTELL(*pzlib_filefunc_def,filestream); |
| 346 |
| 347 if (uMaxBack>uSizeFile) |
| 348 uMaxBack = uSizeFile; |
| 349 |
| 350 buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4); |
| 351 if (buf==NULL) |
| 352 return 0; |
| 353 |
| 354 uBackRead = 4; |
| 355 while (uBackRead<uMaxBack) |
| 356 { |
| 357 uLong uReadSize,uReadPos ; |
| 358 int i; |
| 359 if (uBackRead+BUFREADCOMMENT>uMaxBack) |
| 360 uBackRead = uMaxBack; |
| 361 else |
| 362 uBackRead+=BUFREADCOMMENT; |
| 363 uReadPos = uSizeFile-uBackRead ; |
| 364 |
| 365 uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ? |
| 366 (BUFREADCOMMENT+4) : (uSizeFile-uReadPos); |
| 367 if (ZSEEK(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET
)!=0) |
| 368 break; |
| 369 |
| 370 if (ZREAD(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize) |
| 371 break; |
| 372 |
| 373 for (i=(int)uReadSize-3; (i--)>0;) |
| 374 if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && |
| 375 ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06)) |
| 376 { |
| 377 uPosFound = uReadPos+i; |
| 378 break; |
| 379 } |
| 380 |
| 381 if (uPosFound!=0) |
| 382 break; |
| 383 } |
| 384 TRYFREE(buf); |
| 385 return uPosFound; |
| 386 } |
| 387 |
| 388 /* |
| 389 Open a Zip file. path contain the full pathname (by example, |
| 390 on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer |
| 391 "zlib/zlib114.zip". |
| 392 If the zipfile cannot be opened (file doesn't exist or in not valid), the |
| 393 return value is NULL. |
| 394 Else, the return value is a unzFile Handle, usable with other function |
| 395 of this unzip package. |
| 396 */ |
| 397 extern unzFile ZEXPORT unzOpen2 (path, pzlib_filefunc_def) |
| 398 const char *path; |
| 399 zlib_filefunc_def* pzlib_filefunc_def; |
| 400 { |
| 401 unz_s us; |
| 402 unz_s *s; |
| 403 uLong central_pos,uL; |
| 404 |
| 405 uLong number_disk; /* number of the current dist, used for |
| 406 spaning ZIP, unsupported, always 0*/ |
| 407 uLong number_disk_with_CD; /* number the the disk with central dir, used |
| 408 for spaning ZIP, unsupported, always 0*/ |
| 409 uLong number_entry_CD; /* total number of entries in |
| 410 the central dir |
| 411 (same than number_entry on nospan) */ |
| 412 |
| 413 int err=UNZ_OK; |
| 414 |
| 415 if (unz_copyright[0]!=' ') |
| 416 return NULL; |
| 417 |
| 418 if (pzlib_filefunc_def==NULL) |
| 419 fill_fopen_filefunc(&us.z_filefunc); |
| 420 else |
| 421 us.z_filefunc = *pzlib_filefunc_def; |
| 422 |
| 423 us.filestream= (*(us.z_filefunc.zopen_file))(us.z_filefunc.opaque, |
| 424 path, |
| 425 ZLIB_FILEFUNC_MODE_READ | |
| 426 ZLIB_FILEFUNC_MODE_EXISTING); |
| 427 if (us.filestream==NULL) |
| 428 return NULL; |
| 429 |
| 430 central_pos = unzlocal_SearchCentralDir(&us.z_filefunc,us.filestream); |
| 431 if (central_pos==0) |
| 432 err=UNZ_ERRNO; |
| 433 |
| 434 if (ZSEEK(us.z_filefunc, us.filestream, |
| 435 central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0) |
| 436 err=UNZ_ERRNO; |
| 437 |
| 438 /* the signature, already checked */ |
| 439 if (unzlocal_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK) |
| 440 err=UNZ_ERRNO; |
| 441 |
| 442 /* number of this disk */ |
| 443 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK) |
| 444 err=UNZ_ERRNO; |
| 445 |
| 446 /* number of the disk with the start of the central directory */ |
| 447 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=U
NZ_OK) |
| 448 err=UNZ_ERRNO; |
| 449 |
| 450 /* total number of entries in the central dir on this disk */ |
| 451 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.number_entry)!=UN
Z_OK) |
| 452 err=UNZ_ERRNO; |
| 453 |
| 454 /* total number of entries in the central dir */ |
| 455 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_entry_CD)!=UNZ_O
K) |
| 456 err=UNZ_ERRNO; |
| 457 |
| 458 if ((number_entry_CD!=us.gi.number_entry) || |
| 459 (number_disk_with_CD!=0) || |
| 460 (number_disk!=0)) |
| 461 err=UNZ_BADZIPFILE; |
| 462 |
| 463 /* size of the central directory */ |
| 464 if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.size_central_dir)!=UN
Z_OK) |
| 465 err=UNZ_ERRNO; |
| 466 |
| 467 /* offset of start of central directory with respect to the |
| 468 starting disk number */ |
| 469 if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.offset_central_dir)!=
UNZ_OK) |
| 470 err=UNZ_ERRNO; |
| 471 |
| 472 /* zipfile comment length */ |
| 473 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.size_comment)!=UN
Z_OK) |
| 474 err=UNZ_ERRNO; |
| 475 |
| 476 if ((central_pos<us.offset_central_dir+us.size_central_dir) && |
| 477 (err==UNZ_OK)) |
| 478 err=UNZ_BADZIPFILE; |
| 479 |
| 480 if (err!=UNZ_OK) |
| 481 { |
| 482 ZCLOSE(us.z_filefunc, us.filestream); |
| 483 return NULL; |
| 484 } |
| 485 |
| 486 us.byte_before_the_zipfile = central_pos - |
| 487 (us.offset_central_dir+us.size_central_dir); |
| 488 us.central_pos = central_pos; |
| 489 us.pfile_in_zip_read = NULL; |
| 490 us.encrypted = 0; |
| 491 |
| 492 |
| 493 s=(unz_s*)ALLOC(sizeof(unz_s)); |
| 494 *s=us; |
| 495 unzGoToFirstFile((unzFile)s); |
| 496 return (unzFile)s; |
| 497 } |
| 498 |
| 499 |
| 500 extern unzFile ZEXPORT unzOpen (path) |
| 501 const char *path; |
| 502 { |
| 503 return unzOpen2(path, NULL); |
| 504 } |
| 505 |
| 506 /* |
| 507 Close a ZipFile opened with unzipOpen. |
| 508 If there is files inside the .Zip opened with unzipOpenCurrentFile (see later)
, |
| 509 these files MUST be closed with unzipCloseCurrentFile before call unzipClose
. |
| 510 return UNZ_OK if there is no problem. */ |
| 511 extern int ZEXPORT unzClose (file) |
| 512 unzFile file; |
| 513 { |
| 514 unz_s* s; |
| 515 if (file==NULL) |
| 516 return UNZ_PARAMERROR; |
| 517 s=(unz_s*)file; |
| 518 |
| 519 if (s->pfile_in_zip_read!=NULL) |
| 520 unzCloseCurrentFile(file); |
| 521 |
| 522 ZCLOSE(s->z_filefunc, s->filestream); |
| 523 TRYFREE(s); |
| 524 return UNZ_OK; |
| 525 } |
| 526 |
| 527 |
| 528 /* |
| 529 Write info about the ZipFile in the *pglobal_info structure. |
| 530 No preparation of the structure is needed |
| 531 return UNZ_OK if there is no problem. */ |
| 532 extern int ZEXPORT unzGetGlobalInfo (file,pglobal_info) |
| 533 unzFile file; |
| 534 unz_global_info *pglobal_info; |
| 535 { |
| 536 unz_s* s; |
| 537 if (file==NULL) |
| 538 return UNZ_PARAMERROR; |
| 539 s=(unz_s*)file; |
| 540 *pglobal_info=s->gi; |
| 541 return UNZ_OK; |
| 542 } |
| 543 |
| 544 |
| 545 /* |
| 546 Translate date/time from Dos format to tm_unz (readable more easilty) |
| 547 */ |
| 548 local void unzlocal_DosDateToTmuDate (ulDosDate, ptm) |
| 549 uLong ulDosDate; |
| 550 tm_unz* ptm; |
| 551 { |
| 552 uLong uDate; |
| 553 uDate = (uLong)(ulDosDate>>16); |
| 554 ptm->tm_mday = (uInt)(uDate&0x1f) ; |
| 555 ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1) ; |
| 556 ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ; |
| 557 |
| 558 ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800); |
| 559 ptm->tm_min = (uInt) ((ulDosDate&0x7E0)/0x20) ; |
| 560 ptm->tm_sec = (uInt) (2*(ulDosDate&0x1f)) ; |
| 561 } |
| 562 |
| 563 /* |
| 564 Get Info about the current file in the zipfile, with internal only info |
| 565 */ |
| 566 local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file, |
| 567 unz_file_info *pfile_info, |
| 568 unz_file_info_internal |
| 569 *pfile_info_internal, |
| 570 char *szFileName, |
| 571 uLong fileNameBufferSize, |
| 572 void *extraField, |
| 573 uLong extraFieldBufferSize, |
| 574 char *szComment, |
| 575 uLong commentBufferSize)); |
| 576 |
| 577 local int unzlocal_GetCurrentFileInfoInternal (file, |
| 578 pfile_info, |
| 579 pfile_info_internal, |
| 580 szFileName, fileNameBufferSize, |
| 581 extraField, extraFieldBufferSize, |
| 582 szComment, commentBufferSize) |
| 583 unzFile file; |
| 584 unz_file_info *pfile_info; |
| 585 unz_file_info_internal *pfile_info_internal; |
| 586 char *szFileName; |
| 587 uLong fileNameBufferSize; |
| 588 void *extraField; |
| 589 uLong extraFieldBufferSize; |
| 590 char *szComment; |
| 591 uLong commentBufferSize; |
| 592 { |
| 593 unz_s* s; |
| 594 unz_file_info file_info; |
| 595 unz_file_info_internal file_info_internal; |
| 596 int err=UNZ_OK; |
| 597 uLong uMagic; |
| 598 long lSeek=0; |
| 599 |
| 600 if (file==NULL) |
| 601 return UNZ_PARAMERROR; |
| 602 s=(unz_s*)file; |
| 603 if (ZSEEK(s->z_filefunc, s->filestream, |
| 604 s->pos_in_central_dir+s->byte_before_the_zipfile, |
| 605 ZLIB_FILEFUNC_SEEK_SET)!=0) |
| 606 err=UNZ_ERRNO; |
| 607 |
| 608 |
| 609 /* we check the magic */ |
| 610 if (err==UNZ_OK) |
| 611 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK) |
| 612 err=UNZ_ERRNO; |
| 613 else if (uMagic!=0x02014b50) |
| 614 err=UNZ_BADZIPFILE; |
| 615 |
| 616 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version) != U
NZ_OK) |
| 617 err=UNZ_ERRNO; |
| 618 |
| 619 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version_neede
d) != UNZ_OK) |
| 620 err=UNZ_ERRNO; |
| 621 |
| 622 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_
OK) |
| 623 err=UNZ_ERRNO; |
| 624 |
| 625 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.compression_m
ethod) != UNZ_OK) |
| 626 err=UNZ_ERRNO; |
| 627 |
| 628 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UN
Z_OK) |
| 629 err=UNZ_ERRNO; |
| 630 |
| 631 unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date); |
| 632 |
| 633 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK
) |
| 634 err=UNZ_ERRNO; |
| 635 |
| 636 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.compressed_siz
e) != UNZ_OK) |
| 637 err=UNZ_ERRNO; |
| 638 |
| 639 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.uncompressed_s
ize) != UNZ_OK) |
| 640 err=UNZ_ERRNO; |
| 641 |
| 642 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename
) != UNZ_OK) |
| 643 err=UNZ_ERRNO; |
| 644 |
| 645 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_ext
ra) != UNZ_OK) |
| 646 err=UNZ_ERRNO; |
| 647 |
| 648 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_com
ment) != UNZ_OK) |
| 649 err=UNZ_ERRNO; |
| 650 |
| 651 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_star
t) != UNZ_OK) |
| 652 err=UNZ_ERRNO; |
| 653 |
| 654 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa)
!= UNZ_OK) |
| 655 err=UNZ_ERRNO; |
| 656 |
| 657 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) !
= UNZ_OK) |
| 658 err=UNZ_ERRNO; |
| 659 |
| 660 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info_internal.offse
t_curfile) != UNZ_OK) |
| 661 err=UNZ_ERRNO; |
| 662 |
| 663 lSeek+=file_info.size_filename; |
| 664 if ((err==UNZ_OK) && (szFileName!=NULL)) |
| 665 { |
| 666 uLong uSizeRead ; |
| 667 if (file_info.size_filename<fileNameBufferSize) |
| 668 { |
| 669 *(szFileName+file_info.size_filename)='\0'; |
| 670 uSizeRead = file_info.size_filename; |
| 671 } |
| 672 else |
| 673 uSizeRead = fileNameBufferSize; |
| 674 |
| 675 if ((file_info.size_filename>0) && (fileNameBufferSize>0)) |
| 676 if (ZREAD(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeR
ead) |
| 677 err=UNZ_ERRNO; |
| 678 lSeek -= uSizeRead; |
| 679 } |
| 680 |
| 681 |
| 682 if ((err==UNZ_OK) && (extraField!=NULL)) |
| 683 { |
| 684 uLong uSizeRead ; |
| 685 if (file_info.size_file_extra<extraFieldBufferSize) |
| 686 uSizeRead = file_info.size_file_extra; |
| 687 else |
| 688 uSizeRead = extraFieldBufferSize; |
| 689 |
| 690 if (lSeek!=0) |
| 691 if (ZSEEK(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)
==0) |
| 692 lSeek=0; |
| 693 else |
| 694 err=UNZ_ERRNO; |
| 695 if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0)) |
| 696 if (ZREAD(s->z_filefunc, s->filestream,extraField,uSizeRead)!=uSizeR
ead) |
| 697 err=UNZ_ERRNO; |
| 698 lSeek += file_info.size_file_extra - uSizeRead; |
| 699 } |
| 700 else |
| 701 lSeek+=file_info.size_file_extra; |
| 702 |
| 703 |
| 704 if ((err==UNZ_OK) && (szComment!=NULL)) |
| 705 { |
| 706 uLong uSizeRead ; |
| 707 if (file_info.size_file_comment<commentBufferSize) |
| 708 { |
| 709 *(szComment+file_info.size_file_comment)='\0'; |
| 710 uSizeRead = file_info.size_file_comment; |
| 711 } |
| 712 else |
| 713 uSizeRead = commentBufferSize; |
| 714 |
| 715 if (lSeek!=0) |
| 716 if (ZSEEK(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)
==0) |
| 717 lSeek=0; |
| 718 else |
| 719 err=UNZ_ERRNO; |
| 720 if ((file_info.size_file_comment>0) && (commentBufferSize>0)) |
| 721 if (ZREAD(s->z_filefunc, s->filestream,szComment,uSizeRead)!=uSizeRe
ad) |
| 722 err=UNZ_ERRNO; |
| 723 lSeek+=file_info.size_file_comment - uSizeRead; |
| 724 } |
| 725 else |
| 726 lSeek+=file_info.size_file_comment; |
| 727 |
| 728 if ((err==UNZ_OK) && (pfile_info!=NULL)) |
| 729 *pfile_info=file_info; |
| 730 |
| 731 if ((err==UNZ_OK) && (pfile_info_internal!=NULL)) |
| 732 *pfile_info_internal=file_info_internal; |
| 733 |
| 734 return err; |
| 735 } |
| 736 |
| 737 |
| 738 |
| 739 /* |
| 740 Write info about the ZipFile in the *pglobal_info structure. |
| 741 No preparation of the structure is needed |
| 742 return UNZ_OK if there is no problem. |
| 743 */ |
| 744 extern int ZEXPORT unzGetCurrentFileInfo (file, |
| 745 pfile_info, |
| 746 szFileName, fileNameBufferSize, |
| 747 extraField, extraFieldBufferSize, |
| 748 szComment, commentBufferSize) |
| 749 unzFile file; |
| 750 unz_file_info *pfile_info; |
| 751 char *szFileName; |
| 752 uLong fileNameBufferSize; |
| 753 void *extraField; |
| 754 uLong extraFieldBufferSize; |
| 755 char *szComment; |
| 756 uLong commentBufferSize; |
| 757 { |
| 758 return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL, |
| 759 szFileName,fileNameBufferSize, |
| 760 extraField,extraFieldBufferSize, |
| 761 szComment,commentBufferSize); |
| 762 } |
| 763 |
| 764 /* |
| 765 Set the current file of the zipfile to the first file. |
| 766 return UNZ_OK if there is no problem |
| 767 */ |
| 768 extern int ZEXPORT unzGoToFirstFile (file) |
| 769 unzFile file; |
| 770 { |
| 771 int err=UNZ_OK; |
| 772 unz_s* s; |
| 773 if (file==NULL) |
| 774 return UNZ_PARAMERROR; |
| 775 s=(unz_s*)file; |
| 776 s->pos_in_central_dir=s->offset_central_dir; |
| 777 s->num_file=0; |
| 778 err=unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info, |
| 779 &s->cur_file_info_internal, |
| 780 NULL,0,NULL,0,NULL,0); |
| 781 s->current_file_ok = (err == UNZ_OK); |
| 782 return err; |
| 783 } |
| 784 |
| 785 /* |
| 786 Set the current file of the zipfile to the next file. |
| 787 return UNZ_OK if there is no problem |
| 788 return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest. |
| 789 */ |
| 790 extern int ZEXPORT unzGoToNextFile (file) |
| 791 unzFile file; |
| 792 { |
| 793 unz_s* s; |
| 794 int err; |
| 795 |
| 796 if (file==NULL) |
| 797 return UNZ_PARAMERROR; |
| 798 s=(unz_s*)file; |
| 799 if (!s->current_file_ok) |
| 800 return UNZ_END_OF_LIST_OF_FILE; |
| 801 if (s->gi.number_entry != 0xffff) /* 2^16 files overflow hack */ |
| 802 if (s->num_file+1==s->gi.number_entry) |
| 803 return UNZ_END_OF_LIST_OF_FILE; |
| 804 |
| 805 s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename
+ |
| 806 s->cur_file_info.size_file_extra + s->cur_file_info.size_file_commen
t ; |
| 807 s->num_file++; |
| 808 err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info, |
| 809 &s->cur_file_info_internal, |
| 810 NULL,0,NULL,0,NULL,0); |
| 811 s->current_file_ok = (err == UNZ_OK); |
| 812 return err; |
| 813 } |
| 814 |
| 815 |
| 816 /* |
| 817 Try locate the file szFileName in the zipfile. |
| 818 For the iCaseSensitivity signification, see unzipStringFileNameCompare |
| 819 |
| 820 return value : |
| 821 UNZ_OK if the file is found. It becomes the current file. |
| 822 UNZ_END_OF_LIST_OF_FILE if the file is not found |
| 823 */ |
| 824 extern int ZEXPORT unzLocateFile (file, szFileName, iCaseSensitivity) |
| 825 unzFile file; |
| 826 const char *szFileName; |
| 827 int iCaseSensitivity; |
| 828 { |
| 829 unz_s* s; |
| 830 int err; |
| 831 |
| 832 /* We remember the 'current' position in the file so that we can jump |
| 833 * back there if we fail. |
| 834 */ |
| 835 unz_file_info cur_file_infoSaved; |
| 836 unz_file_info_internal cur_file_info_internalSaved; |
| 837 uLong num_fileSaved; |
| 838 uLong pos_in_central_dirSaved; |
| 839 |
| 840 |
| 841 if (file==NULL) |
| 842 return UNZ_PARAMERROR; |
| 843 |
| 844 if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP) |
| 845 return UNZ_PARAMERROR; |
| 846 |
| 847 s=(unz_s*)file; |
| 848 if (!s->current_file_ok) |
| 849 return UNZ_END_OF_LIST_OF_FILE; |
| 850 |
| 851 /* Save the current state */ |
| 852 num_fileSaved = s->num_file; |
| 853 pos_in_central_dirSaved = s->pos_in_central_dir; |
| 854 cur_file_infoSaved = s->cur_file_info; |
| 855 cur_file_info_internalSaved = s->cur_file_info_internal; |
| 856 |
| 857 err = unzGoToFirstFile(file); |
| 858 |
| 859 while (err == UNZ_OK) |
| 860 { |
| 861 char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1]; |
| 862 err = unzGetCurrentFileInfo(file,NULL, |
| 863 szCurrentFileName,sizeof(szCurrentFileName)-
1, |
| 864 NULL,0,NULL,0); |
| 865 if (err == UNZ_OK) |
| 866 { |
| 867 if (unzStringFileNameCompare(szCurrentFileName, |
| 868 szFileName,iCaseSensitivity)==0) |
| 869 return UNZ_OK; |
| 870 err = unzGoToNextFile(file); |
| 871 } |
| 872 } |
| 873 |
| 874 /* We failed, so restore the state of the 'current file' to where we |
| 875 * were. |
| 876 */ |
| 877 s->num_file = num_fileSaved ; |
| 878 s->pos_in_central_dir = pos_in_central_dirSaved ; |
| 879 s->cur_file_info = cur_file_infoSaved; |
| 880 s->cur_file_info_internal = cur_file_info_internalSaved; |
| 881 return err; |
| 882 } |
| 883 |
| 884 |
| 885 /* |
| 886 /////////////////////////////////////////// |
| 887 // Contributed by Ryan Haksi (mailto://cryogen@infoserve.net) |
| 888 // I need random access |
| 889 // |
| 890 // Further optimization could be realized by adding an ability |
| 891 // to cache the directory in memory. The goal being a single |
| 892 // comprehensive file read to put the file I need in a memory. |
| 893 */ |
| 894 |
| 895 /* |
| 896 typedef struct unz_file_pos_s |
| 897 { |
| 898 uLong pos_in_zip_directory; // offset in file |
| 899 uLong num_of_file; // # of file |
| 900 } unz_file_pos; |
| 901 */ |
| 902 |
| 903 extern int ZEXPORT unzGetFilePos(file, file_pos) |
| 904 unzFile file; |
| 905 unz_file_pos* file_pos; |
| 906 { |
| 907 unz_s* s; |
| 908 |
| 909 if (file==NULL || file_pos==NULL) |
| 910 return UNZ_PARAMERROR; |
| 911 s=(unz_s*)file; |
| 912 if (!s->current_file_ok) |
| 913 return UNZ_END_OF_LIST_OF_FILE; |
| 914 |
| 915 file_pos->pos_in_zip_directory = s->pos_in_central_dir; |
| 916 file_pos->num_of_file = s->num_file; |
| 917 |
| 918 return UNZ_OK; |
| 919 } |
| 920 |
| 921 extern int ZEXPORT unzGoToFilePos(file, file_pos) |
| 922 unzFile file; |
| 923 unz_file_pos* file_pos; |
| 924 { |
| 925 unz_s* s; |
| 926 int err; |
| 927 |
| 928 if (file==NULL || file_pos==NULL) |
| 929 return UNZ_PARAMERROR; |
| 930 s=(unz_s*)file; |
| 931 |
| 932 /* jump to the right spot */ |
| 933 s->pos_in_central_dir = file_pos->pos_in_zip_directory; |
| 934 s->num_file = file_pos->num_of_file; |
| 935 |
| 936 /* set the current file */ |
| 937 err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info, |
| 938 &s->cur_file_info_internal, |
| 939 NULL,0,NULL,0,NULL,0); |
| 940 /* return results */ |
| 941 s->current_file_ok = (err == UNZ_OK); |
| 942 return err; |
| 943 } |
| 944 |
| 945 /* |
| 946 // Unzip Helper Functions - should be here? |
| 947 /////////////////////////////////////////// |
| 948 */ |
| 949 |
| 950 /* |
| 951 Read the local header of the current zipfile |
| 952 Check the coherency of the local header and info in the end of central |
| 953 directory about this file |
| 954 store in *piSizeVar the size of extra info in local header |
| 955 (filename and size of extra field data) |
| 956 */ |
| 957 local int unzlocal_CheckCurrentFileCoherencyHeader (s,piSizeVar, |
| 958 poffset_local_extrafield, |
| 959 psize_local_extrafield) |
| 960 unz_s* s; |
| 961 uInt* piSizeVar; |
| 962 uLong *poffset_local_extrafield; |
| 963 uInt *psize_local_extrafield; |
| 964 { |
| 965 uLong uMagic,uData,uFlags; |
| 966 uLong size_filename; |
| 967 uLong size_extra_field; |
| 968 int err=UNZ_OK; |
| 969 |
| 970 *piSizeVar = 0; |
| 971 *poffset_local_extrafield = 0; |
| 972 *psize_local_extrafield = 0; |
| 973 |
| 974 if (ZSEEK(s->z_filefunc, s->filestream,s->cur_file_info_internal.offset_curf
ile + |
| 975 s->byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SE
T)!=0) |
| 976 return UNZ_ERRNO; |
| 977 |
| 978 |
| 979 if (err==UNZ_OK) |
| 980 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK) |
| 981 err=UNZ_ERRNO; |
| 982 else if (uMagic!=0x04034b50) |
| 983 err=UNZ_BADZIPFILE; |
| 984 |
| 985 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) |
| 986 err=UNZ_ERRNO; |
| 987 /* |
| 988 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion)) |
| 989 err=UNZ_BADZIPFILE; |
| 990 */ |
| 991 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uFlags) != UNZ_OK) |
| 992 err=UNZ_ERRNO; |
| 993 |
| 994 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) |
| 995 err=UNZ_ERRNO; |
| 996 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method)) |
| 997 err=UNZ_BADZIPFILE; |
| 998 |
| 999 if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) && |
| 1000 (s->cur_file_info.compression_method!=Z_DEFLATED)) |
| 1001 err=UNZ_BADZIPFILE; |
| 1002 |
| 1003 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* dat
e/time */ |
| 1004 err=UNZ_ERRNO; |
| 1005 |
| 1006 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* crc
*/ |
| 1007 err=UNZ_ERRNO; |
| 1008 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) && |
| 1009 ((uFlags & 8)==0)) |
| 1010 err=UNZ_BADZIPFILE; |
| 1011 |
| 1012 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* siz
e compr */ |
| 1013 err=UNZ_ERRNO; |
| 1014 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) && |
| 1015 ((uFlags & 8)==0)) |
| 1016 err=UNZ_BADZIPFILE; |
| 1017 |
| 1018 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* siz
e uncompr */ |
| 1019 err=UNZ_ERRNO; |
| 1020 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) && |
| 1021 ((uFlags & 8)==0)) |
| 1022 err=UNZ_BADZIPFILE; |
| 1023 |
| 1024 |
| 1025 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&size_filename) != UNZ_O
K) |
| 1026 err=UNZ_ERRNO; |
| 1027 else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename)) |
| 1028 err=UNZ_BADZIPFILE; |
| 1029 |
| 1030 *piSizeVar += (uInt)size_filename; |
| 1031 |
| 1032 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&size_extra_field) != UN
Z_OK) |
| 1033 err=UNZ_ERRNO; |
| 1034 *poffset_local_extrafield= s->cur_file_info_internal.offset_curfile + |
| 1035 SIZEZIPLOCALHEADER + size_filename; |
| 1036 *psize_local_extrafield = (uInt)size_extra_field; |
| 1037 |
| 1038 *piSizeVar += (uInt)size_extra_field; |
| 1039 |
| 1040 return err; |
| 1041 } |
| 1042 |
| 1043 /* |
| 1044 Open for reading data the current file in the zipfile. |
| 1045 If there is no error and the file is opened, the return value is UNZ_OK. |
| 1046 */ |
| 1047 extern int ZEXPORT unzOpenCurrentFile3 (file, method, level, raw, password) |
| 1048 unzFile file; |
| 1049 int* method; |
| 1050 int* level; |
| 1051 int raw; |
| 1052 const char* password; |
| 1053 { |
| 1054 int err=UNZ_OK; |
| 1055 uInt iSizeVar; |
| 1056 unz_s* s; |
| 1057 file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1058 uLong offset_local_extrafield; /* offset of the local extra field */ |
| 1059 uInt size_local_extrafield; /* size of the local extra field */ |
| 1060 # ifndef NOUNCRYPT |
| 1061 char source[12]; |
| 1062 # else |
| 1063 if (password != NULL) |
| 1064 return UNZ_PARAMERROR; |
| 1065 # endif |
| 1066 |
| 1067 if (file==NULL) |
| 1068 return UNZ_PARAMERROR; |
| 1069 s=(unz_s*)file; |
| 1070 if (!s->current_file_ok) |
| 1071 return UNZ_PARAMERROR; |
| 1072 |
| 1073 if (s->pfile_in_zip_read != NULL) |
| 1074 unzCloseCurrentFile(file); |
| 1075 |
| 1076 if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar, |
| 1077 &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK) |
| 1078 return UNZ_BADZIPFILE; |
| 1079 |
| 1080 pfile_in_zip_read_info = (file_in_zip_read_info_s*) |
| 1081 ALLOC(sizeof(file_in_zip_read_info_s)); |
| 1082 if (pfile_in_zip_read_info==NULL) |
| 1083 return UNZ_INTERNALERROR; |
| 1084 |
| 1085 pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE); |
| 1086 pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield; |
| 1087 pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield; |
| 1088 pfile_in_zip_read_info->pos_local_extrafield=0; |
| 1089 pfile_in_zip_read_info->raw=raw; |
| 1090 |
| 1091 if (pfile_in_zip_read_info->read_buffer==NULL) |
| 1092 { |
| 1093 TRYFREE(pfile_in_zip_read_info); |
| 1094 return UNZ_INTERNALERROR; |
| 1095 } |
| 1096 |
| 1097 pfile_in_zip_read_info->stream_initialised=0; |
| 1098 |
| 1099 if (method!=NULL) |
| 1100 *method = (int)s->cur_file_info.compression_method; |
| 1101 |
| 1102 if (level!=NULL) |
| 1103 { |
| 1104 *level = 6; |
| 1105 switch (s->cur_file_info.flag & 0x06) |
| 1106 { |
| 1107 case 6 : *level = 1; break; |
| 1108 case 4 : *level = 2; break; |
| 1109 case 2 : *level = 9; break; |
| 1110 } |
| 1111 } |
| 1112 |
| 1113 if ((s->cur_file_info.compression_method!=0) && |
| 1114 (s->cur_file_info.compression_method!=Z_DEFLATED)) |
| 1115 err=UNZ_BADZIPFILE; |
| 1116 |
| 1117 pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc; |
| 1118 pfile_in_zip_read_info->crc32=0; |
| 1119 pfile_in_zip_read_info->compression_method = |
| 1120 s->cur_file_info.compression_method; |
| 1121 pfile_in_zip_read_info->filestream=s->filestream; |
| 1122 pfile_in_zip_read_info->z_filefunc=s->z_filefunc; |
| 1123 pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile; |
| 1124 |
| 1125 pfile_in_zip_read_info->stream.total_out = 0; |
| 1126 |
| 1127 if ((s->cur_file_info.compression_method==Z_DEFLATED) && |
| 1128 (!raw)) |
| 1129 { |
| 1130 pfile_in_zip_read_info->stream.zalloc = (alloc_func)0; |
| 1131 pfile_in_zip_read_info->stream.zfree = (free_func)0; |
| 1132 pfile_in_zip_read_info->stream.opaque = (voidpf)0; |
| 1133 pfile_in_zip_read_info->stream.next_in = (voidpf)0; |
| 1134 pfile_in_zip_read_info->stream.avail_in = 0; |
| 1135 |
| 1136 err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS); |
| 1137 if (err == Z_OK) |
| 1138 pfile_in_zip_read_info->stream_initialised=1; |
| 1139 else |
| 1140 { |
| 1141 TRYFREE(pfile_in_zip_read_info); |
| 1142 return err; |
| 1143 } |
| 1144 /* windowBits is passed < 0 to tell that there is no zlib header. |
| 1145 * Note that in this case inflate *requires* an extra "dummy" byte |
| 1146 * after the compressed stream in order to complete decompression and |
| 1147 * return Z_STREAM_END. |
| 1148 * In unzip, i don't wait absolutely Z_STREAM_END because I known the |
| 1149 * size of both compressed and uncompressed data |
| 1150 */ |
| 1151 } |
| 1152 pfile_in_zip_read_info->rest_read_compressed = |
| 1153 s->cur_file_info.compressed_size ; |
| 1154 pfile_in_zip_read_info->rest_read_uncompressed = |
| 1155 s->cur_file_info.uncompressed_size ; |
| 1156 |
| 1157 |
| 1158 pfile_in_zip_read_info->pos_in_zipfile = |
| 1159 s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + |
| 1160 iSizeVar; |
| 1161 |
| 1162 pfile_in_zip_read_info->stream.avail_in = (uInt)0; |
| 1163 |
| 1164 s->pfile_in_zip_read = pfile_in_zip_read_info; |
| 1165 |
| 1166 # ifndef NOUNCRYPT |
| 1167 if (password != NULL) |
| 1168 { |
| 1169 int i; |
| 1170 s->pcrc_32_tab = get_crc_table(); |
| 1171 init_keys(password,s->keys,s->pcrc_32_tab); |
| 1172 if (ZSEEK(s->z_filefunc, s->filestream, |
| 1173 s->pfile_in_zip_read->pos_in_zipfile + |
| 1174 s->pfile_in_zip_read->byte_before_the_zipfile, |
| 1175 SEEK_SET)!=0) |
| 1176 return UNZ_INTERNALERROR; |
| 1177 if(ZREAD(s->z_filefunc, s->filestream,source, 12)<12) |
| 1178 return UNZ_INTERNALERROR; |
| 1179 |
| 1180 for (i = 0; i<12; i++) |
| 1181 zdecode(s->keys,s->pcrc_32_tab,source[i]); |
| 1182 |
| 1183 s->pfile_in_zip_read->pos_in_zipfile+=12; |
| 1184 s->encrypted=1; |
| 1185 } |
| 1186 # endif |
| 1187 |
| 1188 |
| 1189 return UNZ_OK; |
| 1190 } |
| 1191 |
| 1192 extern int ZEXPORT unzOpenCurrentFile (file) |
| 1193 unzFile file; |
| 1194 { |
| 1195 return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL); |
| 1196 } |
| 1197 |
| 1198 extern int ZEXPORT unzOpenCurrentFilePassword (file, password) |
| 1199 unzFile file; |
| 1200 const char* password; |
| 1201 { |
| 1202 return unzOpenCurrentFile3(file, NULL, NULL, 0, password); |
| 1203 } |
| 1204 |
| 1205 extern int ZEXPORT unzOpenCurrentFile2 (file,method,level,raw) |
| 1206 unzFile file; |
| 1207 int* method; |
| 1208 int* level; |
| 1209 int raw; |
| 1210 { |
| 1211 return unzOpenCurrentFile3(file, method, level, raw, NULL); |
| 1212 } |
| 1213 |
| 1214 /* |
| 1215 Read bytes from the current file. |
| 1216 buf contain buffer where data must be copied |
| 1217 len the size of buf. |
| 1218 |
| 1219 return the number of byte copied if somes bytes are copied |
| 1220 return 0 if the end of file was reached |
| 1221 return <0 with error code if there is an error |
| 1222 (UNZ_ERRNO for IO error, or zLib error for uncompress error) |
| 1223 */ |
| 1224 extern int ZEXPORT unzReadCurrentFile (file, buf, len) |
| 1225 unzFile file; |
| 1226 voidp buf; |
| 1227 unsigned len; |
| 1228 { |
| 1229 int err=UNZ_OK; |
| 1230 uInt iRead = 0; |
| 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->read_buffer == NULL)) |
| 1243 return UNZ_END_OF_LIST_OF_FILE; |
| 1244 if (len==0) |
| 1245 return 0; |
| 1246 |
| 1247 pfile_in_zip_read_info->stream.next_out = (Bytef*)buf; |
| 1248 |
| 1249 pfile_in_zip_read_info->stream.avail_out = (uInt)len; |
| 1250 |
| 1251 if ((len>pfile_in_zip_read_info->rest_read_uncompressed) && |
| 1252 (!(pfile_in_zip_read_info->raw))) |
| 1253 pfile_in_zip_read_info->stream.avail_out = |
| 1254 (uInt)pfile_in_zip_read_info->rest_read_uncompressed; |
| 1255 |
| 1256 if ((len>pfile_in_zip_read_info->rest_read_compressed+ |
| 1257 pfile_in_zip_read_info->stream.avail_in) && |
| 1258 (pfile_in_zip_read_info->raw)) |
| 1259 pfile_in_zip_read_info->stream.avail_out = |
| 1260 (uInt)pfile_in_zip_read_info->rest_read_compressed+ |
| 1261 pfile_in_zip_read_info->stream.avail_in; |
| 1262 |
| 1263 while (pfile_in_zip_read_info->stream.avail_out>0) |
| 1264 { |
| 1265 if ((pfile_in_zip_read_info->stream.avail_in==0) && |
| 1266 (pfile_in_zip_read_info->rest_read_compressed>0)) |
| 1267 { |
| 1268 uInt uReadThis = UNZ_BUFSIZE; |
| 1269 if (pfile_in_zip_read_info->rest_read_compressed<uReadThis) |
| 1270 uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed; |
| 1271 if (uReadThis == 0) |
| 1272 return UNZ_EOF; |
| 1273 if (ZSEEK(pfile_in_zip_read_info->z_filefunc, |
| 1274 pfile_in_zip_read_info->filestream, |
| 1275 pfile_in_zip_read_info->pos_in_zipfile + |
| 1276 pfile_in_zip_read_info->byte_before_the_zipfile, |
| 1277 ZLIB_FILEFUNC_SEEK_SET)!=0) |
| 1278 return UNZ_ERRNO; |
| 1279 if (ZREAD(pfile_in_zip_read_info->z_filefunc, |
| 1280 pfile_in_zip_read_info->filestream, |
| 1281 pfile_in_zip_read_info->read_buffer, |
| 1282 uReadThis)!=uReadThis) |
| 1283 return UNZ_ERRNO; |
| 1284 |
| 1285 |
| 1286 # ifndef NOUNCRYPT |
| 1287 if(s->encrypted) |
| 1288 { |
| 1289 uInt i; |
| 1290 for(i=0;i<uReadThis;i++) |
| 1291 pfile_in_zip_read_info->read_buffer[i] = |
| 1292 zdecode(s->keys,s->pcrc_32_tab, |
| 1293 pfile_in_zip_read_info->read_buffer[i]); |
| 1294 } |
| 1295 # endif |
| 1296 |
| 1297 |
| 1298 pfile_in_zip_read_info->pos_in_zipfile += uReadThis; |
| 1299 |
| 1300 pfile_in_zip_read_info->rest_read_compressed-=uReadThis; |
| 1301 |
| 1302 pfile_in_zip_read_info->stream.next_in = |
| 1303 (Bytef*)pfile_in_zip_read_info->read_buffer; |
| 1304 pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis; |
| 1305 } |
| 1306 |
| 1307 if ((pfile_in_zip_read_info->compression_method==0) || (pfile_in_zip_rea
d_info->raw)) |
| 1308 { |
| 1309 uInt uDoCopy,i ; |
| 1310 |
| 1311 if ((pfile_in_zip_read_info->stream.avail_in == 0) && |
| 1312 (pfile_in_zip_read_info->rest_read_compressed == 0)) |
| 1313 return (iRead==0) ? UNZ_EOF : iRead; |
| 1314 |
| 1315 if (pfile_in_zip_read_info->stream.avail_out < |
| 1316 pfile_in_zip_read_info->stream.avail_in) |
| 1317 uDoCopy = pfile_in_zip_read_info->stream.avail_out ; |
| 1318 else |
| 1319 uDoCopy = pfile_in_zip_read_info->stream.avail_in ; |
| 1320 |
| 1321 for (i=0;i<uDoCopy;i++) |
| 1322 *(pfile_in_zip_read_info->stream.next_out+i) = |
| 1323 *(pfile_in_zip_read_info->stream.next_in+i); |
| 1324 |
| 1325 pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32, |
| 1326 pfile_in_zip_read_info->stream.next_out, |
| 1327 uDoCopy); |
| 1328 pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy; |
| 1329 pfile_in_zip_read_info->stream.avail_in -= uDoCopy; |
| 1330 pfile_in_zip_read_info->stream.avail_out -= uDoCopy; |
| 1331 pfile_in_zip_read_info->stream.next_out += uDoCopy; |
| 1332 pfile_in_zip_read_info->stream.next_in += uDoCopy; |
| 1333 pfile_in_zip_read_info->stream.total_out += uDoCopy; |
| 1334 iRead += uDoCopy; |
| 1335 } |
| 1336 else |
| 1337 { |
| 1338 uLong uTotalOutBefore,uTotalOutAfter; |
| 1339 const Bytef *bufBefore; |
| 1340 uLong uOutThis; |
| 1341 int flush=Z_SYNC_FLUSH; |
| 1342 |
| 1343 uTotalOutBefore = pfile_in_zip_read_info->stream.total_out; |
| 1344 bufBefore = pfile_in_zip_read_info->stream.next_out; |
| 1345 |
| 1346 /* |
| 1347 if ((pfile_in_zip_read_info->rest_read_uncompressed == |
| 1348 pfile_in_zip_read_info->stream.avail_out) && |
| 1349 (pfile_in_zip_read_info->rest_read_compressed == 0)) |
| 1350 flush = Z_FINISH; |
| 1351 */ |
| 1352 err=inflate(&pfile_in_zip_read_info->stream,flush); |
| 1353 |
| 1354 if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL)) |
| 1355 err = Z_DATA_ERROR; |
| 1356 |
| 1357 uTotalOutAfter = pfile_in_zip_read_info->stream.total_out; |
| 1358 uOutThis = uTotalOutAfter-uTotalOutBefore; |
| 1359 |
| 1360 pfile_in_zip_read_info->crc32 = |
| 1361 crc32(pfile_in_zip_read_info->crc32,bufBefore, |
| 1362 (uInt)(uOutThis)); |
| 1363 |
| 1364 pfile_in_zip_read_info->rest_read_uncompressed -= |
| 1365 uOutThis; |
| 1366 |
| 1367 iRead += (uInt)(uTotalOutAfter - uTotalOutBefore); |
| 1368 |
| 1369 if (err==Z_STREAM_END) |
| 1370 return (iRead==0) ? UNZ_EOF : iRead; |
| 1371 if (err!=Z_OK) |
| 1372 break; |
| 1373 } |
| 1374 } |
| 1375 |
| 1376 if (err==Z_OK) |
| 1377 return iRead; |
| 1378 return err; |
| 1379 } |
| 1380 |
| 1381 |
| 1382 /* |
| 1383 Give the current position in uncompressed data |
| 1384 */ |
| 1385 extern z_off_t ZEXPORT unztell (file) |
| 1386 unzFile file; |
| 1387 { |
| 1388 unz_s* s; |
| 1389 file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1390 if (file==NULL) |
| 1391 return UNZ_PARAMERROR; |
| 1392 s=(unz_s*)file; |
| 1393 pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1394 |
| 1395 if (pfile_in_zip_read_info==NULL) |
| 1396 return UNZ_PARAMERROR; |
| 1397 |
| 1398 return (z_off_t)pfile_in_zip_read_info->stream.total_out; |
| 1399 } |
| 1400 |
| 1401 |
| 1402 /* |
| 1403 return 1 if the end of file was reached, 0 elsewhere |
| 1404 */ |
| 1405 extern int ZEXPORT unzeof (file) |
| 1406 unzFile file; |
| 1407 { |
| 1408 unz_s* s; |
| 1409 file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1410 if (file==NULL) |
| 1411 return UNZ_PARAMERROR; |
| 1412 s=(unz_s*)file; |
| 1413 pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1414 |
| 1415 if (pfile_in_zip_read_info==NULL) |
| 1416 return UNZ_PARAMERROR; |
| 1417 |
| 1418 if (pfile_in_zip_read_info->rest_read_uncompressed == 0) |
| 1419 return 1; |
| 1420 else |
| 1421 return 0; |
| 1422 } |
| 1423 |
| 1424 |
| 1425 |
| 1426 /* |
| 1427 Read extra field from the current file (opened by unzOpenCurrentFile) |
| 1428 This is the local-header version of the extra field (sometimes, there is |
| 1429 more info in the local-header version than in the central-header) |
| 1430 |
| 1431 if buf==NULL, it return the size of the local extra field that can be read |
| 1432 |
| 1433 if buf!=NULL, len is the size of the buffer, the extra header is copied in |
| 1434 buf. |
| 1435 the return value is the number of bytes copied in buf, or (if <0) |
| 1436 the error code |
| 1437 */ |
| 1438 extern int ZEXPORT unzGetLocalExtrafield (file,buf,len) |
| 1439 unzFile file; |
| 1440 voidp buf; |
| 1441 unsigned len; |
| 1442 { |
| 1443 unz_s* s; |
| 1444 file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1445 uInt read_now; |
| 1446 uLong size_to_read; |
| 1447 |
| 1448 if (file==NULL) |
| 1449 return UNZ_PARAMERROR; |
| 1450 s=(unz_s*)file; |
| 1451 pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1452 |
| 1453 if (pfile_in_zip_read_info==NULL) |
| 1454 return UNZ_PARAMERROR; |
| 1455 |
| 1456 size_to_read = (pfile_in_zip_read_info->size_local_extrafield - |
| 1457 pfile_in_zip_read_info->pos_local_extrafield); |
| 1458 |
| 1459 if (buf==NULL) |
| 1460 return (int)size_to_read; |
| 1461 |
| 1462 if (len>size_to_read) |
| 1463 read_now = (uInt)size_to_read; |
| 1464 else |
| 1465 read_now = (uInt)len ; |
| 1466 |
| 1467 if (read_now==0) |
| 1468 return 0; |
| 1469 |
| 1470 if (ZSEEK(pfile_in_zip_read_info->z_filefunc, |
| 1471 pfile_in_zip_read_info->filestream, |
| 1472 pfile_in_zip_read_info->offset_local_extrafield + |
| 1473 pfile_in_zip_read_info->pos_local_extrafield, |
| 1474 ZLIB_FILEFUNC_SEEK_SET)!=0) |
| 1475 return UNZ_ERRNO; |
| 1476 |
| 1477 if (ZREAD(pfile_in_zip_read_info->z_filefunc, |
| 1478 pfile_in_zip_read_info->filestream, |
| 1479 buf,read_now)!=read_now) |
| 1480 return UNZ_ERRNO; |
| 1481 |
| 1482 return (int)read_now; |
| 1483 } |
| 1484 |
| 1485 /* |
| 1486 Close the file in zip opened with unzipOpenCurrentFile |
| 1487 Return UNZ_CRCERROR if all the file was read but the CRC is not good |
| 1488 */ |
| 1489 extern int ZEXPORT unzCloseCurrentFile (file) |
| 1490 unzFile file; |
| 1491 { |
| 1492 int err=UNZ_OK; |
| 1493 |
| 1494 unz_s* s; |
| 1495 file_in_zip_read_info_s* pfile_in_zip_read_info; |
| 1496 if (file==NULL) |
| 1497 return UNZ_PARAMERROR; |
| 1498 s=(unz_s*)file; |
| 1499 pfile_in_zip_read_info=s->pfile_in_zip_read; |
| 1500 |
| 1501 if (pfile_in_zip_read_info==NULL) |
| 1502 return UNZ_PARAMERROR; |
| 1503 |
| 1504 |
| 1505 if ((pfile_in_zip_read_info->rest_read_uncompressed == 0) && |
| 1506 (!pfile_in_zip_read_info->raw)) |
| 1507 { |
| 1508 if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait) |
| 1509 err=UNZ_CRCERROR; |
| 1510 } |
| 1511 |
| 1512 |
| 1513 TRYFREE(pfile_in_zip_read_info->read_buffer); |
| 1514 pfile_in_zip_read_info->read_buffer = NULL; |
| 1515 if (pfile_in_zip_read_info->stream_initialised) |
| 1516 inflateEnd(&pfile_in_zip_read_info->stream); |
| 1517 |
| 1518 pfile_in_zip_read_info->stream_initialised = 0; |
| 1519 TRYFREE(pfile_in_zip_read_info); |
| 1520 |
| 1521 s->pfile_in_zip_read=NULL; |
| 1522 |
| 1523 return err; |
| 1524 } |
| 1525 |
| 1526 |
| 1527 /* |
| 1528 Get the global comment string of the ZipFile, in the szComment buffer. |
| 1529 uSizeBuf is the size of the szComment buffer. |
| 1530 return the number of byte copied or an error code <0 |
| 1531 */ |
| 1532 extern int ZEXPORT unzGetGlobalComment (file, szComment, uSizeBuf) |
| 1533 unzFile file; |
| 1534 char *szComment; |
| 1535 uLong uSizeBuf; |
| 1536 { |
| 1537 int err=UNZ_OK; |
| 1538 unz_s* s; |
| 1539 uLong uReadThis ; |
| 1540 if (file==NULL) |
| 1541 return UNZ_PARAMERROR; |
| 1542 s=(unz_s*)file; |
| 1543 |
| 1544 uReadThis = uSizeBuf; |
| 1545 if (uReadThis>s->gi.size_comment) |
| 1546 uReadThis = s->gi.size_comment; |
| 1547 |
| 1548 if (ZSEEK(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_S
ET)!=0) |
| 1549 return UNZ_ERRNO; |
| 1550 |
| 1551 if (uReadThis>0) |
| 1552 { |
| 1553 *szComment='\0'; |
| 1554 if (ZREAD(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis) |
| 1555 return UNZ_ERRNO; |
| 1556 } |
| 1557 |
| 1558 if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment)) |
| 1559 *(szComment+s->gi.size_comment)='\0'; |
| 1560 return (int)uReadThis; |
| 1561 } |
| 1562 |
| 1563 /* Additions by RX '2004 */ |
| 1564 extern uLong ZEXPORT unzGetOffset (file) |
| 1565 unzFile file; |
| 1566 { |
| 1567 unz_s* s; |
| 1568 |
| 1569 if (file==NULL) |
| 1570 return UNZ_PARAMERROR; |
| 1571 s=(unz_s*)file; |
| 1572 if (!s->current_file_ok) |
| 1573 return 0; |
| 1574 if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff) |
| 1575 if (s->num_file==s->gi.number_entry) |
| 1576 return 0; |
| 1577 return s->pos_in_central_dir; |
| 1578 } |
| 1579 |
| 1580 extern int ZEXPORT unzSetOffset (file, pos) |
| 1581 unzFile file; |
| 1582 uLong pos; |
| 1583 { |
| 1584 unz_s* s; |
| 1585 int err; |
| 1586 |
| 1587 if (file==NULL) |
| 1588 return UNZ_PARAMERROR; |
| 1589 s=(unz_s*)file; |
| 1590 |
| 1591 s->pos_in_central_dir = pos; |
| 1592 s->num_file = s->gi.number_entry; /* hack */ |
| 1593 err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info, |
| 1594 &s->cur_file_info_internal, |
| 1595 NULL,0,NULL,0,NULL,0); |
| 1596 s->current_file_ok = (err == UNZ_OK); |
| 1597 return err; |
| 1598 } |
OLD | NEW |