5752
+ − 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 Modified by Sergey A. Tachenov to integrate with Qt.
+ − 9 */
+ − 10
+ − 11 /* Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of
+ − 12 compatibility with older software. The following is from the original crypt.c. Code
+ − 13 woven in by Terry Thorsen 1/2003.
+ − 14 */
+ − 15 /*
+ − 16 Copyright (c) 1990-2000 Info-ZIP. All rights reserved.
+ − 17
+ − 18 See the accompanying file LICENSE, version 2000-Apr-09 or later
+ − 19 (the contents of which are also included in zip.h) for terms of use.
+ − 20 If, for some reason, all these files are missing, the Info-ZIP license
+ − 21 also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
+ − 22 */
+ − 23 /*
+ − 24 crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h]
+ − 25
+ − 26 The encryption/decryption parts of this source code (as opposed to the
+ − 27 non-echoing password parts) were originally written in Europe. The
+ − 28 whole source package can be freely distributed, including from the USA.
+ − 29 (Prior to January 2000, re-export from the US was a violation of US law.)
+ − 30 */
+ − 31
+ − 32 /*
+ − 33 This encryption code is a direct transcription of the algorithm from
+ − 34 Roger Schlafly, described by Phil Katz in the file appnote.txt. This
+ − 35 file (appnote.txt) is distributed with the PKZIP program (even in the
+ − 36 version without encryption capabilities).
+ − 37 */
+ − 38
+ − 39
+ − 40 #include <stdio.h>
+ − 41 #include <stdlib.h>
+ − 42 #include <string.h>
+ − 43 #include "zlib.h"
+ − 44 #include "unzip.h"
+ − 45
+ − 46 #ifdef STDC
+ − 47 # include <stddef.h>
+ − 48 # include <string.h>
+ − 49 # include <stdlib.h>
+ − 50 #endif
+ − 51 #ifdef NO_ERRNO_H
+ − 52 extern int errno;
+ − 53 #else
+ − 54 # include <errno.h>
+ − 55 #endif
+ − 56
+ − 57
+ − 58 #ifndef local
+ − 59 # define local static
+ − 60 #endif
+ − 61 /* compile with -Dlocal if your debugger can't find static symbols */
+ − 62
+ − 63
+ − 64 #ifndef CASESENSITIVITYDEFAULT_NO
+ − 65 # if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES)
+ − 66 # define CASESENSITIVITYDEFAULT_NO
+ − 67 # endif
+ − 68 #endif
+ − 69
+ − 70
+ − 71 #ifndef UNZ_BUFSIZE
+ − 72 #define UNZ_BUFSIZE (16384)
+ − 73 #endif
+ − 74
+ − 75 #ifndef UNZ_MAXFILENAMEINZIP
+ − 76 #define UNZ_MAXFILENAMEINZIP (256)
+ − 77 #endif
+ − 78
+ − 79 #ifndef ALLOC
+ − 80 # define ALLOC(size) (malloc(size))
+ − 81 #endif
+ − 82 #ifndef TRYFREE
+ − 83 # define TRYFREE(p) {if (p) free(p);}
+ − 84 #endif
+ − 85
+ − 86 #define SIZECENTRALDIRITEM (0x2e)
+ − 87 #define SIZEZIPLOCALHEADER (0x1e)
+ − 88
+ − 89
+ − 90
+ − 91
+ − 92 const char unz_copyright[] =
+ − 93 " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
+ − 94
+ − 95 /* unz_file_info_interntal contain internal info about a file in zipfile*/
+ − 96 typedef struct unz_file_info_internal_s
+ − 97 {
+ − 98 uLong offset_curfile;/* relative offset of local header 4 bytes */
+ − 99 } unz_file_info_internal;
+ − 100
+ − 101
+ − 102 /* file_in_zip_read_info_s contain internal information about a file in zipfile,
+ − 103 when reading and decompress it */
+ − 104 typedef struct
+ − 105 {
+ − 106 char *read_buffer; /* internal buffer for compressed data */
+ − 107 z_stream stream; /* zLib stream structure for inflate */
+ − 108
+ − 109 uLong pos_in_zipfile; /* position in byte on the zipfile, for fseek*/
+ − 110 uLong stream_initialised; /* flag set if stream structure is initialised*/
+ − 111
+ − 112 uLong offset_local_extrafield;/* offset of the local extra field */
+ − 113 uInt size_local_extrafield;/* size of the local extra field */
+ − 114 uLong pos_local_extrafield; /* position in the local extra field in read*/
+ − 115
+ − 116 uLong crc32; /* crc32 of all data uncompressed */
+ − 117 uLong crc32_wait; /* crc32 we must obtain after decompress all */
+ − 118 uLong rest_read_compressed; /* number of byte to be decompressed */
+ − 119 uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/
+ − 120 zlib_filefunc_def z_filefunc;
+ − 121 voidpf filestream; /* io structore of the zipfile */
+ − 122 uLong compression_method; /* compression method (0==store) */
+ − 123 uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
+ − 124 int raw;
+ − 125 } file_in_zip_read_info_s;
+ − 126
+ − 127
+ − 128 /* unz_s contain internal information about the zipfile
+ − 129 */
+ − 130 typedef struct
+ − 131 {
+ − 132 zlib_filefunc_def z_filefunc;
+ − 133 voidpf filestream; /* io structore of the zipfile */
+ − 134 unz_global_info gi; /* public global information */
+ − 135 uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
+ − 136 uLong num_file; /* number of the current file in the zipfile*/
+ − 137 uLong pos_in_central_dir; /* pos of the current file in the central dir*/
+ − 138 uLong current_file_ok; /* flag about the usability of the current file*/
+ − 139 uLong central_pos; /* position of the beginning of the central dir*/
+ − 140
+ − 141 uLong size_central_dir; /* size of the central directory */
+ − 142 uLong offset_central_dir; /* offset of start of central directory with
+ − 143 respect to the starting disk number */
+ − 144
+ − 145 unz_file_info cur_file_info; /* public info about the current file in zip*/
+ − 146 unz_file_info_internal cur_file_info_internal; /* private info about it*/
+ − 147 file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current
+ − 148 file if we are decompressing it */
+ − 149 int encrypted;
+ − 150 # ifndef NOUNCRYPT
+ − 151 unsigned long keys[3]; /* keys defining the pseudo-random sequence */
+ − 152 const unsigned long* pcrc_32_tab;
+ − 153 # endif
+ − 154 } unz_s;
+ − 155
+ − 156
+ − 157 #ifndef NOUNCRYPT
+ − 158 #include "crypt.h"
+ − 159 #endif
+ − 160
+ − 161 /* ===========================================================================
+ − 162 Read a byte from a gz_stream; update next_in and avail_in. Return EOF
+ − 163 for end of file.
+ − 164 IN assertion: the stream s has been sucessfully opened for reading.
+ − 165 */
+ − 166
+ − 167
+ − 168 local int unzlocal_getByte OF((
+ − 169 const zlib_filefunc_def* pzlib_filefunc_def,
+ − 170 voidpf filestream,
+ − 171 int *pi));
+ − 172
+ − 173 local int unzlocal_getByte(pzlib_filefunc_def,filestream,pi)
+ − 174 const zlib_filefunc_def* pzlib_filefunc_def;
+ − 175 voidpf filestream;
+ − 176 int *pi;
+ − 177 {
+ − 178 unsigned char c;
+ − 179 int err = (int)ZREAD(*pzlib_filefunc_def,filestream,&c,1);
+ − 180 if (err==1)
+ − 181 {
+ − 182 *pi = (int)c;
+ − 183 return UNZ_OK;
+ − 184 }
+ − 185 else
+ − 186 {
+ − 187 if (ZERROR(*pzlib_filefunc_def,filestream))
+ − 188 return UNZ_ERRNO;
+ − 189 else
+ − 190 return UNZ_EOF;
+ − 191 }
+ − 192 }
+ − 193
+ − 194
+ − 195 /* ===========================================================================
+ − 196 Reads a long in LSB order from the given gz_stream. Sets
+ − 197 */
+ − 198 local int unzlocal_getShort OF((
+ − 199 const zlib_filefunc_def* pzlib_filefunc_def,
+ − 200 voidpf filestream,
+ − 201 uLong *pX));
+ − 202
+ − 203 local int unzlocal_getShort (pzlib_filefunc_def,filestream,pX)
+ − 204 const zlib_filefunc_def* pzlib_filefunc_def;
+ − 205 voidpf filestream;
+ − 206 uLong *pX;
+ − 207 {
+ − 208 uLong x ;
+ − 209 int i;
+ − 210 int err;
+ − 211
+ − 212 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
+ − 213 x = (uLong)i;
+ − 214
+ − 215 if (err==UNZ_OK)
+ − 216 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
+ − 217 x += ((uLong)i)<<8;
+ − 218
+ − 219 if (err==UNZ_OK)
+ − 220 *pX = x;
+ − 221 else
+ − 222 *pX = 0;
+ − 223 return err;
+ − 224 }
+ − 225
+ − 226 local int unzlocal_getLong OF((
+ − 227 const zlib_filefunc_def* pzlib_filefunc_def,
+ − 228 voidpf filestream,
+ − 229 uLong *pX));
+ − 230
+ − 231 local int unzlocal_getLong (pzlib_filefunc_def,filestream,pX)
+ − 232 const zlib_filefunc_def* pzlib_filefunc_def;
+ − 233 voidpf filestream;
+ − 234 uLong *pX;
+ − 235 {
+ − 236 uLong x ;
+ − 237 int i;
+ − 238 int err;
+ − 239
+ − 240 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
+ − 241 x = (uLong)i;
+ − 242
+ − 243 if (err==UNZ_OK)
+ − 244 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
+ − 245 x += ((uLong)i)<<8;
+ − 246
+ − 247 if (err==UNZ_OK)
+ − 248 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
+ − 249 x += ((uLong)i)<<16;
+ − 250
+ − 251 if (err==UNZ_OK)
+ − 252 err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
+ − 253 x += ((uLong)i)<<24;
+ − 254
+ − 255 if (err==UNZ_OK)
+ − 256 *pX = x;
+ − 257 else
+ − 258 *pX = 0;
+ − 259 return err;
+ − 260 }
+ − 261
+ − 262
+ − 263 /* My own strcmpi / strcasecmp */
+ − 264 local int strcmpcasenosensitive_internal (fileName1,fileName2)
+ − 265 const char* fileName1;
+ − 266 const char* fileName2;
+ − 267 {
+ − 268 for (;;)
+ − 269 {
+ − 270 char c1=*(fileName1++);
+ − 271 char c2=*(fileName2++);
+ − 272 if ((c1>='a') && (c1<='z'))
+ − 273 c1 -= 0x20;
+ − 274 if ((c2>='a') && (c2<='z'))
+ − 275 c2 -= 0x20;
+ − 276 if (c1=='\0')
+ − 277 return ((c2=='\0') ? 0 : -1);
+ − 278 if (c2=='\0')
+ − 279 return 1;
+ − 280 if (c1<c2)
+ − 281 return -1;
+ − 282 if (c1>c2)
+ − 283 return 1;
+ − 284 }
+ − 285 }
+ − 286
+ − 287
+ − 288 #ifdef CASESENSITIVITYDEFAULT_NO
+ − 289 #define CASESENSITIVITYDEFAULTVALUE 2
+ − 290 #else
+ − 291 #define CASESENSITIVITYDEFAULTVALUE 1
+ − 292 #endif
+ − 293
+ − 294 #ifndef STRCMPCASENOSENTIVEFUNCTION
+ − 295 #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
+ − 296 #endif
+ − 297
+ − 298 /*
+ − 299 Compare two filename (fileName1,fileName2).
+ − 300 If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
+ − 301 If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
+ − 302 or strcasecmp)
+ − 303 If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
+ − 304 (like 1 on Unix, 2 on Windows)
+ − 305
+ − 306 */
+ − 307 extern int ZEXPORT unzStringFileNameCompare (fileName1,fileName2,iCaseSensitivity)
+ − 308 const char* fileName1;
+ − 309 const char* fileName2;
+ − 310 int iCaseSensitivity;
+ − 311 {
+ − 312 if (iCaseSensitivity==0)
+ − 313 iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
+ − 314
+ − 315 if (iCaseSensitivity==1)
+ − 316 return strcmp(fileName1,fileName2);
+ − 317
+ − 318 return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
+ − 319 }
+ − 320
+ − 321 #ifndef BUFREADCOMMENT
+ − 322 #define BUFREADCOMMENT (0x400)
+ − 323 #endif
+ − 324
+ − 325 /*
+ − 326 Locate the Central directory of a zipfile (at the end, just before
+ − 327 the global comment)
+ − 328 */
+ − 329 local uLong unzlocal_SearchCentralDir OF((
+ − 330 const zlib_filefunc_def* pzlib_filefunc_def,
+ − 331 voidpf filestream));
+ − 332
+ − 333 local uLong unzlocal_SearchCentralDir(pzlib_filefunc_def,filestream)
+ − 334 const zlib_filefunc_def* pzlib_filefunc_def;
+ − 335 voidpf filestream;
+ − 336 {
+ − 337 unsigned char* buf;
+ − 338 uLong uSizeFile;
+ − 339 uLong uBackRead;
+ − 340 uLong uMaxBack=0xffff; /* maximum size of global comment */
+ − 341 uLong uPosFound=0;
+ − 342
+ − 343 if (ZSEEK(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
+ − 344 return 0;
+ − 345
+ − 346
+ − 347 uSizeFile = ZTELL(*pzlib_filefunc_def,filestream);
+ − 348
+ − 349 if (uMaxBack>uSizeFile)
+ − 350 uMaxBack = uSizeFile;
+ − 351
+ − 352 buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
+ − 353 if (buf==NULL)
+ − 354 return 0;
+ − 355
+ − 356 uBackRead = 4;
+ − 357 while (uBackRead<uMaxBack)
+ − 358 {
+ − 359 uLong uReadSize,uReadPos ;
+ − 360 int i;
+ − 361 if (uBackRead+BUFREADCOMMENT>uMaxBack)
+ − 362 uBackRead = uMaxBack;
+ − 363 else
+ − 364 uBackRead+=BUFREADCOMMENT;
+ − 365 uReadPos = uSizeFile-uBackRead ;
+ − 366
+ − 367 uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
+ − 368 (BUFREADCOMMENT+4) : (uSizeFile-uReadPos);
+ − 369 if (ZSEEK(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
+ − 370 break;
+ − 371
+ − 372 if (ZREAD(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
+ − 373 break;
+ − 374
+ − 375 for (i=(int)uReadSize-3; (i--)>0;)
+ − 376 if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
+ − 377 ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
+ − 378 {
+ − 379 uPosFound = uReadPos+i;
+ − 380 break;
+ − 381 }
+ − 382
+ − 383 if (uPosFound!=0)
+ − 384 break;
+ − 385 }
+ − 386 TRYFREE(buf);
+ − 387 return uPosFound;
+ − 388 }
+ − 389
+ − 390 /*
+ − 391 Open a Zip file. path contain the full pathname (by example,
+ − 392 on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer
+ − 393 "zlib/zlib114.zip".
+ − 394 If the zipfile cannot be opened (file doesn't exist or in not valid), the
+ − 395 return value is NULL.
+ − 396 Else, the return value is a unzFile Handle, usable with other function
+ − 397 of this unzip package.
+ − 398 */
+ − 399 extern unzFile ZEXPORT unzOpen2 (file, pzlib_filefunc_def)
+ − 400 voidpf file;
+ − 401 zlib_filefunc_def* pzlib_filefunc_def;
+ − 402 {
+ − 403 unz_s us;
+ − 404 unz_s *s;
+ − 405 uLong central_pos,uL;
+ − 406
+ − 407 uLong number_disk; /* number of the current dist, used for
+ − 408 spaning ZIP, unsupported, always 0*/
+ − 409 uLong number_disk_with_CD; /* number the the disk with central dir, used
+ − 410 for spaning ZIP, unsupported, always 0*/
+ − 411 uLong number_entry_CD; /* total number of entries in
+ − 412 the central dir
+ − 413 (same than number_entry on nospan) */
+ − 414
+ − 415 int err=UNZ_OK;
+ − 416
+ − 417 if (unz_copyright[0]!=' ')
+ − 418 return NULL;
+ − 419
+ − 420 if (pzlib_filefunc_def==NULL)
+ − 421 fill_qiodevice_filefunc(&us.z_filefunc);
+ − 422 else
+ − 423 us.z_filefunc = *pzlib_filefunc_def;
+ − 424
+ − 425 us.filestream= (*(us.z_filefunc.zopen_file))(us.z_filefunc.opaque,
+ − 426 file,
+ − 427 ZLIB_FILEFUNC_MODE_READ |
+ − 428 ZLIB_FILEFUNC_MODE_EXISTING);
+ − 429 if (us.filestream==NULL)
+ − 430 return NULL;
+ − 431
+ − 432 central_pos = unzlocal_SearchCentralDir(&us.z_filefunc,us.filestream);
+ − 433 if (central_pos==0)
+ − 434 err=UNZ_ERRNO;
+ − 435
+ − 436 if (ZSEEK(us.z_filefunc, us.filestream,
+ − 437 central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
+ − 438 err=UNZ_ERRNO;
+ − 439
+ − 440 /* the signature, already checked */
+ − 441 if (unzlocal_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
+ − 442 err=UNZ_ERRNO;
+ − 443
+ − 444 /* number of this disk */
+ − 445 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)
+ − 446 err=UNZ_ERRNO;
+ − 447
+ − 448 /* number of the disk with the start of the central directory */
+ − 449 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)
+ − 450 err=UNZ_ERRNO;
+ − 451
+ − 452 /* total number of entries in the central dir on this disk */
+ − 453 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.number_entry)!=UNZ_OK)
+ − 454 err=UNZ_ERRNO;
+ − 455
+ − 456 /* total number of entries in the central dir */
+ − 457 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_entry_CD)!=UNZ_OK)
+ − 458 err=UNZ_ERRNO;
+ − 459
+ − 460 if ((number_entry_CD!=us.gi.number_entry) ||
+ − 461 (number_disk_with_CD!=0) ||
+ − 462 (number_disk!=0))
+ − 463 err=UNZ_BADZIPFILE;
+ − 464
+ − 465 /* size of the central directory */
+ − 466 if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.size_central_dir)!=UNZ_OK)
+ − 467 err=UNZ_ERRNO;
+ − 468
+ − 469 /* offset of start of central directory with respect to the
+ − 470 starting disk number */
+ − 471 if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.offset_central_dir)!=UNZ_OK)
+ − 472 err=UNZ_ERRNO;
+ − 473
+ − 474 /* zipfile comment length */
+ − 475 if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.size_comment)!=UNZ_OK)
+ − 476 err=UNZ_ERRNO;
+ − 477
+ − 478 if ((central_pos<us.offset_central_dir+us.size_central_dir) &&
+ − 479 (err==UNZ_OK))
+ − 480 err=UNZ_BADZIPFILE;
+ − 481
+ − 482 if (err!=UNZ_OK)
+ − 483 {
+ − 484 ZCLOSE(us.z_filefunc, us.filestream);
+ − 485 return NULL;
+ − 486 }
+ − 487
+ − 488 us.byte_before_the_zipfile = central_pos -
+ − 489 (us.offset_central_dir+us.size_central_dir);
+ − 490 us.central_pos = central_pos;
+ − 491 us.pfile_in_zip_read = NULL;
+ − 492 us.encrypted = 0;
+ − 493
+ − 494
+ − 495 s=(unz_s*)ALLOC(sizeof(unz_s));
+ − 496 *s=us;
+ − 497 unzGoToFirstFile((unzFile)s);
+ − 498 return (unzFile)s;
+ − 499 }
+ − 500
+ − 501
+ − 502 extern unzFile ZEXPORT unzOpen (file)
+ − 503 voidpf file;
+ − 504 {
+ − 505 return unzOpen2(file, NULL);
+ − 506 }
+ − 507
+ − 508 /*
+ − 509 Close a ZipFile opened with unzipOpen.
+ − 510 If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),
+ − 511 these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
+ − 512 return UNZ_OK if there is no problem. */
+ − 513 extern int ZEXPORT unzClose (file)
+ − 514 unzFile file;
+ − 515 {
+ − 516 unz_s* s;
+ − 517 if (file==NULL)
+ − 518 return UNZ_PARAMERROR;
+ − 519 s=(unz_s*)file;
+ − 520
+ − 521 if (s->pfile_in_zip_read!=NULL)
+ − 522 unzCloseCurrentFile(file);
+ − 523
+ − 524 ZCLOSE(s->z_filefunc, s->filestream);
+ − 525 TRYFREE(s);
+ − 526 return UNZ_OK;
+ − 527 }
+ − 528
+ − 529
+ − 530 /*
+ − 531 Write info about the ZipFile in the *pglobal_info structure.
+ − 532 No preparation of the structure is needed
+ − 533 return UNZ_OK if there is no problem. */
+ − 534 extern int ZEXPORT unzGetGlobalInfo (file,pglobal_info)
+ − 535 unzFile file;
+ − 536 unz_global_info *pglobal_info;
+ − 537 {
+ − 538 unz_s* s;
+ − 539 if (file==NULL)
+ − 540 return UNZ_PARAMERROR;
+ − 541 s=(unz_s*)file;
+ − 542 *pglobal_info=s->gi;
+ − 543 return UNZ_OK;
+ − 544 }
+ − 545
+ − 546
+ − 547 /*
+ − 548 Translate date/time from Dos format to tm_unz (readable more easilty)
+ − 549 */
+ − 550 local void unzlocal_DosDateToTmuDate (ulDosDate, ptm)
+ − 551 uLong ulDosDate;
+ − 552 tm_unz* ptm;
+ − 553 {
+ − 554 uLong uDate;
+ − 555 uDate = (uLong)(ulDosDate>>16);
+ − 556 ptm->tm_mday = (uInt)(uDate&0x1f) ;
+ − 557 ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1) ;
+ − 558 ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
+ − 559
+ − 560 ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
+ − 561 ptm->tm_min = (uInt) ((ulDosDate&0x7E0)/0x20) ;
+ − 562 ptm->tm_sec = (uInt) (2*(ulDosDate&0x1f)) ;
+ − 563 }
+ − 564
+ − 565 /*
+ − 566 Get Info about the current file in the zipfile, with internal only info
+ − 567 */
+ − 568 local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file,
+ − 569 unz_file_info *pfile_info,
+ − 570 unz_file_info_internal
+ − 571 *pfile_info_internal,
+ − 572 char *szFileName,
+ − 573 uLong fileNameBufferSize,
+ − 574 void *extraField,
+ − 575 uLong extraFieldBufferSize,
+ − 576 char *szComment,
+ − 577 uLong commentBufferSize));
+ − 578
+ − 579 local int unzlocal_GetCurrentFileInfoInternal (file,
+ − 580 pfile_info,
+ − 581 pfile_info_internal,
+ − 582 szFileName, fileNameBufferSize,
+ − 583 extraField, extraFieldBufferSize,
+ − 584 szComment, commentBufferSize)
+ − 585 unzFile file;
+ − 586 unz_file_info *pfile_info;
+ − 587 unz_file_info_internal *pfile_info_internal;
+ − 588 char *szFileName;
+ − 589 uLong fileNameBufferSize;
+ − 590 void *extraField;
+ − 591 uLong extraFieldBufferSize;
+ − 592 char *szComment;
+ − 593 uLong commentBufferSize;
+ − 594 {
+ − 595 unz_s* s;
+ − 596 unz_file_info file_info;
+ − 597 unz_file_info_internal file_info_internal;
+ − 598 int err=UNZ_OK;
+ − 599 uLong uMagic;
+ − 600 uLong uSeek=0;
+ − 601
+ − 602 if (file==NULL)
+ − 603 return UNZ_PARAMERROR;
+ − 604 s=(unz_s*)file;
+ − 605 if (ZSEEK(s->z_filefunc, s->filestream,
+ − 606 s->pos_in_central_dir+s->byte_before_the_zipfile,
+ − 607 ZLIB_FILEFUNC_SEEK_SET)!=0)
+ − 608 err=UNZ_ERRNO;
+ − 609
+ − 610
+ − 611 /* we check the magic */
+ − 612 if (err==UNZ_OK) {
+ − 613 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
+ − 614 err=UNZ_ERRNO;
+ − 615 else if (uMagic!=0x02014b50)
+ − 616 err=UNZ_BADZIPFILE;
+ − 617 }
+ − 618
+ − 619 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version) != UNZ_OK)
+ − 620 err=UNZ_ERRNO;
+ − 621
+ − 622 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version_needed) != UNZ_OK)
+ − 623 err=UNZ_ERRNO;
+ − 624
+ − 625 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_OK)
+ − 626 err=UNZ_ERRNO;
+ − 627
+ − 628 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.compression_method) != UNZ_OK)
+ − 629 err=UNZ_ERRNO;
+ − 630
+ − 631 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UNZ_OK)
+ − 632 err=UNZ_ERRNO;
+ − 633
+ − 634 unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
+ − 635
+ − 636 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK)
+ − 637 err=UNZ_ERRNO;
+ − 638
+ − 639 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK)
+ − 640 err=UNZ_ERRNO;
+ − 641
+ − 642 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK)
+ − 643 err=UNZ_ERRNO;
+ − 644
+ − 645 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename) != UNZ_OK)
+ − 646 err=UNZ_ERRNO;
+ − 647
+ − 648 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_extra) != UNZ_OK)
+ − 649 err=UNZ_ERRNO;
+ − 650
+ − 651 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_comment) != UNZ_OK)
+ − 652 err=UNZ_ERRNO;
+ − 653
+ − 654 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK)
+ − 655 err=UNZ_ERRNO;
+ − 656
+ − 657 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa) != UNZ_OK)
+ − 658 err=UNZ_ERRNO;
+ − 659
+ − 660 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) != UNZ_OK)
+ − 661 err=UNZ_ERRNO;
+ − 662
+ − 663 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK)
+ − 664 err=UNZ_ERRNO;
+ − 665
+ − 666 uSeek+=file_info.size_filename;
+ − 667 if ((err==UNZ_OK) && (szFileName!=NULL))
+ − 668 {
+ − 669 uLong uSizeRead ;
+ − 670 if (file_info.size_filename<fileNameBufferSize)
+ − 671 {
+ − 672 *(szFileName+file_info.size_filename)='\0';
+ − 673 uSizeRead = file_info.size_filename;
+ − 674 }
+ − 675 else
+ − 676 uSizeRead = fileNameBufferSize;
+ − 677
+ − 678 if ((file_info.size_filename>0) && (fileNameBufferSize>0))
+ − 679 if (ZREAD(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeRead)
+ − 680 err=UNZ_ERRNO;
+ − 681 uSeek -= uSizeRead;
+ − 682 }
+ − 683
+ − 684
+ − 685 if ((err==UNZ_OK) && (extraField!=NULL))
+ − 686 {
+ − 687 uLong uSizeRead ;
+ − 688 if (file_info.size_file_extra<extraFieldBufferSize)
+ − 689 uSizeRead = file_info.size_file_extra;
+ − 690 else
+ − 691 uSizeRead = extraFieldBufferSize;
+ − 692
+ − 693 if (uSeek!=0) {
+ − 694 if (ZSEEK(s->z_filefunc, s->filestream,uSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+ − 695 uSeek=0;
+ − 696 else
+ − 697 err=UNZ_ERRNO;
+ − 698 }
+ − 699 if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
+ − 700 if (ZREAD(s->z_filefunc, s->filestream,extraField,uSizeRead)!=uSizeRead)
+ − 701 err=UNZ_ERRNO;
+ − 702 uSeek += file_info.size_file_extra - uSizeRead;
+ − 703 }
+ − 704 else
+ − 705 uSeek+=file_info.size_file_extra;
+ − 706
+ − 707
+ − 708 if ((err==UNZ_OK) && (szComment!=NULL))
+ − 709 {
+ − 710 uLong uSizeRead ;
+ − 711 if (file_info.size_file_comment<commentBufferSize)
+ − 712 {
+ − 713 *(szComment+file_info.size_file_comment)='\0';
+ − 714 uSizeRead = file_info.size_file_comment;
+ − 715 }
+ − 716 else
+ − 717 uSizeRead = commentBufferSize;
+ − 718
+ − 719 if (uSeek!=0) {
+ − 720 if (ZSEEK(s->z_filefunc, s->filestream,uSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+ − 721 uSeek=0;
+ − 722 else
+ − 723 err=UNZ_ERRNO;
+ − 724 }
+ − 725 if ((file_info.size_file_comment>0) && (commentBufferSize>0))
+ − 726 if (ZREAD(s->z_filefunc, s->filestream,szComment,uSizeRead)!=uSizeRead)
+ − 727 err=UNZ_ERRNO;
+ − 728 uSeek+=file_info.size_file_comment - uSizeRead;
+ − 729 }
+ − 730 else
+ − 731 uSeek+=file_info.size_file_comment;
+ − 732
+ − 733 if ((err==UNZ_OK) && (pfile_info!=NULL))
+ − 734 *pfile_info=file_info;
+ − 735
+ − 736 if ((err==UNZ_OK) && (pfile_info_internal!=NULL))
+ − 737 *pfile_info_internal=file_info_internal;
+ − 738
+ − 739 return err;
+ − 740 }
+ − 741
+ − 742
+ − 743
+ − 744 /*
+ − 745 Write info about the ZipFile in the *pglobal_info structure.
+ − 746 No preparation of the structure is needed
+ − 747 return UNZ_OK if there is no problem.
+ − 748 */
+ − 749 extern int ZEXPORT unzGetCurrentFileInfo (file,
+ − 750 pfile_info,
+ − 751 szFileName, fileNameBufferSize,
+ − 752 extraField, extraFieldBufferSize,
+ − 753 szComment, commentBufferSize)
+ − 754 unzFile file;
+ − 755 unz_file_info *pfile_info;
+ − 756 char *szFileName;
+ − 757 uLong fileNameBufferSize;
+ − 758 void *extraField;
+ − 759 uLong extraFieldBufferSize;
+ − 760 char *szComment;
+ − 761 uLong commentBufferSize;
+ − 762 {
+ − 763 return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL,
+ − 764 szFileName,fileNameBufferSize,
+ − 765 extraField,extraFieldBufferSize,
+ − 766 szComment,commentBufferSize);
+ − 767 }
+ − 768
+ − 769 /*
+ − 770 Set the current file of the zipfile to the first file.
+ − 771 return UNZ_OK if there is no problem
+ − 772 */
+ − 773 extern int ZEXPORT unzGoToFirstFile (file)
+ − 774 unzFile file;
+ − 775 {
+ − 776 int err=UNZ_OK;
+ − 777 unz_s* s;
+ − 778 if (file==NULL)
+ − 779 return UNZ_PARAMERROR;
+ − 780 s=(unz_s*)file;
+ − 781 s->pos_in_central_dir=s->offset_central_dir;
+ − 782 s->num_file=0;
+ − 783 err=unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
+ − 784 &s->cur_file_info_internal,
+ − 785 NULL,0,NULL,0,NULL,0);
+ − 786 s->current_file_ok = (err == UNZ_OK);
+ − 787 return err;
+ − 788 }
+ − 789
+ − 790 /*
+ − 791 Set the current file of the zipfile to the next file.
+ − 792 return UNZ_OK if there is no problem
+ − 793 return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
+ − 794 */
+ − 795 extern int ZEXPORT unzGoToNextFile (file)
+ − 796 unzFile file;
+ − 797 {
+ − 798 unz_s* s;
+ − 799 int err;
+ − 800
+ − 801 if (file==NULL)
+ − 802 return UNZ_PARAMERROR;
+ − 803 s=(unz_s*)file;
+ − 804 if (!s->current_file_ok)
+ − 805 return UNZ_END_OF_LIST_OF_FILE;
+ − 806 if (s->gi.number_entry != 0xffff) /* 2^16 files overflow hack */
+ − 807 if (s->num_file+1==s->gi.number_entry)
+ − 808 return UNZ_END_OF_LIST_OF_FILE;
+ − 809
+ − 810 s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
+ − 811 s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;
+ − 812 s->num_file++;
+ − 813 err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
+ − 814 &s->cur_file_info_internal,
+ − 815 NULL,0,NULL,0,NULL,0);
+ − 816 s->current_file_ok = (err == UNZ_OK);
+ − 817 return err;
+ − 818 }
+ − 819
+ − 820
+ − 821 /*
+ − 822 Try locate the file szFileName in the zipfile.
+ − 823 For the iCaseSensitivity signification, see unzipStringFileNameCompare
+ − 824
+ − 825 return value :
+ − 826 UNZ_OK if the file is found. It becomes the current file.
+ − 827 UNZ_END_OF_LIST_OF_FILE if the file is not found
+ − 828 */
+ − 829 extern int ZEXPORT unzLocateFile (file, szFileName, iCaseSensitivity)
+ − 830 unzFile file;
+ − 831 const char *szFileName;
+ − 832 int iCaseSensitivity;
+ − 833 {
+ − 834 unz_s* s;
+ − 835 int err;
+ − 836
+ − 837 /* We remember the 'current' position in the file so that we can jump
+ − 838 * back there if we fail.
+ − 839 */
+ − 840 unz_file_info cur_file_infoSaved;
+ − 841 unz_file_info_internal cur_file_info_internalSaved;
+ − 842 uLong num_fileSaved;
+ − 843 uLong pos_in_central_dirSaved;
+ − 844
+ − 845
+ − 846 if (file==NULL)
+ − 847 return UNZ_PARAMERROR;
+ − 848
+ − 849 if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP)
+ − 850 return UNZ_PARAMERROR;
+ − 851
+ − 852 s=(unz_s*)file;
+ − 853 if (!s->current_file_ok)
+ − 854 return UNZ_END_OF_LIST_OF_FILE;
+ − 855
+ − 856 /* Save the current state */
+ − 857 num_fileSaved = s->num_file;
+ − 858 pos_in_central_dirSaved = s->pos_in_central_dir;
+ − 859 cur_file_infoSaved = s->cur_file_info;
+ − 860 cur_file_info_internalSaved = s->cur_file_info_internal;
+ − 861
+ − 862 err = unzGoToFirstFile(file);
+ − 863
+ − 864 while (err == UNZ_OK)
+ − 865 {
+ − 866 char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
+ − 867 err = unzGetCurrentFileInfo(file,NULL,
+ − 868 szCurrentFileName,sizeof(szCurrentFileName)-1,
+ − 869 NULL,0,NULL,0);
+ − 870 if (err == UNZ_OK)
+ − 871 {
+ − 872 if (unzStringFileNameCompare(szCurrentFileName,
+ − 873 szFileName,iCaseSensitivity)==0)
+ − 874 return UNZ_OK;
+ − 875 err = unzGoToNextFile(file);
+ − 876 }
+ − 877 }
+ − 878
+ − 879 /* We failed, so restore the state of the 'current file' to where we
+ − 880 * were.
+ − 881 */
+ − 882 s->num_file = num_fileSaved ;
+ − 883 s->pos_in_central_dir = pos_in_central_dirSaved ;
+ − 884 s->cur_file_info = cur_file_infoSaved;
+ − 885 s->cur_file_info_internal = cur_file_info_internalSaved;
+ − 886 return err;
+ − 887 }
+ − 888
+ − 889
+ − 890 /*
+ − 891 ///////////////////////////////////////////
+ − 892 // Contributed by Ryan Haksi (mailto://cryogen@infoserve.net)
+ − 893 // I need random access
+ − 894 //
+ − 895 // Further optimization could be realized by adding an ability
+ − 896 // to cache the directory in memory. The goal being a single
+ − 897 // comprehensive file read to put the file I need in a memory.
+ − 898 */
+ − 899
+ − 900 /*
+ − 901 typedef struct unz_file_pos_s
+ − 902 {
+ − 903 uLong pos_in_zip_directory; // offset in file
+ − 904 uLong num_of_file; // # of file
+ − 905 } unz_file_pos;
+ − 906 */
+ − 907
+ − 908 extern int ZEXPORT unzGetFilePos(file, file_pos)
+ − 909 unzFile file;
+ − 910 unz_file_pos* file_pos;
+ − 911 {
+ − 912 unz_s* s;
+ − 913
+ − 914 if (file==NULL || file_pos==NULL)
+ − 915 return UNZ_PARAMERROR;
+ − 916 s=(unz_s*)file;
+ − 917 if (!s->current_file_ok)
+ − 918 return UNZ_END_OF_LIST_OF_FILE;
+ − 919
+ − 920 file_pos->pos_in_zip_directory = s->pos_in_central_dir;
+ − 921 file_pos->num_of_file = s->num_file;
+ − 922
+ − 923 return UNZ_OK;
+ − 924 }
+ − 925
+ − 926 extern int ZEXPORT unzGoToFilePos(file, file_pos)
+ − 927 unzFile file;
+ − 928 unz_file_pos* file_pos;
+ − 929 {
+ − 930 unz_s* s;
+ − 931 int err;
+ − 932
+ − 933 if (file==NULL || file_pos==NULL)
+ − 934 return UNZ_PARAMERROR;
+ − 935 s=(unz_s*)file;
+ − 936
+ − 937 /* jump to the right spot */
+ − 938 s->pos_in_central_dir = file_pos->pos_in_zip_directory;
+ − 939 s->num_file = file_pos->num_of_file;
+ − 940
+ − 941 /* set the current file */
+ − 942 err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
+ − 943 &s->cur_file_info_internal,
+ − 944 NULL,0,NULL,0,NULL,0);
+ − 945 /* return results */
+ − 946 s->current_file_ok = (err == UNZ_OK);
+ − 947 return err;
+ − 948 }
+ − 949
+ − 950 /*
+ − 951 // Unzip Helper Functions - should be here?
+ − 952 ///////////////////////////////////////////
+ − 953 */
+ − 954
+ − 955 /*
+ − 956 Read the local header of the current zipfile
+ − 957 Check the coherency of the local header and info in the end of central
+ − 958 directory about this file
+ − 959 store in *piSizeVar the size of extra info in local header
+ − 960 (filename and size of extra field data)
+ − 961 */
+ − 962 local int unzlocal_CheckCurrentFileCoherencyHeader (s,piSizeVar,
+ − 963 poffset_local_extrafield,
+ − 964 psize_local_extrafield)
+ − 965 unz_s* s;
+ − 966 uInt* piSizeVar;
+ − 967 uLong *poffset_local_extrafield;
+ − 968 uInt *psize_local_extrafield;
+ − 969 {
+ − 970 uLong uMagic,uData,uFlags;
+ − 971 uLong size_filename;
+ − 972 uLong size_extra_field;
+ − 973 int err=UNZ_OK;
+ − 974
+ − 975 *piSizeVar = 0;
+ − 976 *poffset_local_extrafield = 0;
+ − 977 *psize_local_extrafield = 0;
+ − 978
+ − 979 if (ZSEEK(s->z_filefunc, s->filestream,s->cur_file_info_internal.offset_curfile +
+ − 980 s->byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SET)!=0)
+ − 981 return UNZ_ERRNO;
+ − 982
+ − 983
+ − 984 if (err==UNZ_OK) {
+ − 985 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
+ − 986 err=UNZ_ERRNO;
+ − 987 else if (uMagic!=0x04034b50)
+ − 988 err=UNZ_BADZIPFILE;
+ − 989 }
+ − 990
+ − 991 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)
+ − 992 err=UNZ_ERRNO;
+ − 993 /*
+ − 994 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
+ − 995 err=UNZ_BADZIPFILE;
+ − 996 */
+ − 997 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uFlags) != UNZ_OK)
+ − 998 err=UNZ_ERRNO;
+ − 999
+ − 1000 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)
+ − 1001 err=UNZ_ERRNO;
+ − 1002 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method))
+ − 1003 err=UNZ_BADZIPFILE;
+ − 1004
+ − 1005 if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) &&
+ − 1006 (s->cur_file_info.compression_method!=Z_DEFLATED))
+ − 1007 err=UNZ_BADZIPFILE;
+ − 1008
+ − 1009 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* date/time */
+ − 1010 err=UNZ_ERRNO;
+ − 1011
+ − 1012 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* crc */
+ − 1013 err=UNZ_ERRNO;
+ − 1014 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) &&
+ − 1015 ((uFlags & 8)==0))
+ − 1016 err=UNZ_BADZIPFILE;
+ − 1017
+ − 1018 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size compr */
+ − 1019 err=UNZ_ERRNO;
+ − 1020 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) &&
+ − 1021 ((uFlags & 8)==0))
+ − 1022 err=UNZ_BADZIPFILE;
+ − 1023
+ − 1024 if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size uncompr */
+ − 1025 err=UNZ_ERRNO;
+ − 1026 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) &&
+ − 1027 ((uFlags & 8)==0))
+ − 1028 err=UNZ_BADZIPFILE;
+ − 1029
+ − 1030
+ − 1031 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&size_filename) != UNZ_OK)
+ − 1032 err=UNZ_ERRNO;
+ − 1033 else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename))
+ − 1034 err=UNZ_BADZIPFILE;
+ − 1035
+ − 1036 *piSizeVar += (uInt)size_filename;
+ − 1037
+ − 1038 if (unzlocal_getShort(&s->z_filefunc, s->filestream,&size_extra_field) != UNZ_OK)
+ − 1039 err=UNZ_ERRNO;
+ − 1040 *poffset_local_extrafield= s->cur_file_info_internal.offset_curfile +
+ − 1041 SIZEZIPLOCALHEADER + size_filename;
+ − 1042 *psize_local_extrafield = (uInt)size_extra_field;
+ − 1043
+ − 1044 *piSizeVar += (uInt)size_extra_field;
+ − 1045
+ − 1046 return err;
+ − 1047 }
+ − 1048
+ − 1049 /*
+ − 1050 Open for reading data the current file in the zipfile.
+ − 1051 If there is no error and the file is opened, the return value is UNZ_OK.
+ − 1052 */
+ − 1053 extern int ZEXPORT unzOpenCurrentFile3 (file, method, level, raw, password)
+ − 1054 unzFile file;
+ − 1055 int* method;
+ − 1056 int* level;
+ − 1057 int raw;
+ − 1058 const char* password;
+ − 1059 {
+ − 1060 int err=UNZ_OK;
+ − 1061 uInt iSizeVar;
+ − 1062 unz_s* s;
+ − 1063 file_in_zip_read_info_s* pfile_in_zip_read_info;
+ − 1064 uLong offset_local_extrafield; /* offset of the local extra field */
+ − 1065 uInt size_local_extrafield; /* size of the local extra field */
+ − 1066 # ifndef NOUNCRYPT
+ − 1067 char source[12];
+ − 1068 # else
+ − 1069 if (password != NULL)
+ − 1070 return UNZ_PARAMERROR;
+ − 1071 # endif
+ − 1072
+ − 1073 if (file==NULL)
+ − 1074 return UNZ_PARAMERROR;
+ − 1075 s=(unz_s*)file;
+ − 1076 if (!s->current_file_ok)
+ − 1077 return UNZ_PARAMERROR;
+ − 1078
+ − 1079 if (s->pfile_in_zip_read != NULL)
+ − 1080 unzCloseCurrentFile(file);
+ − 1081
+ − 1082 if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar,
+ − 1083 &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK)
+ − 1084 return UNZ_BADZIPFILE;
+ − 1085
+ − 1086 pfile_in_zip_read_info = (file_in_zip_read_info_s*)
+ − 1087 ALLOC(sizeof(file_in_zip_read_info_s));
+ − 1088 if (pfile_in_zip_read_info==NULL)
+ − 1089 return UNZ_INTERNALERROR;
+ − 1090
+ − 1091 pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE);
+ − 1092 pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;
+ − 1093 pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
+ − 1094 pfile_in_zip_read_info->pos_local_extrafield=0;
+ − 1095 pfile_in_zip_read_info->raw=raw;
+ − 1096
+ − 1097 if (pfile_in_zip_read_info->read_buffer==NULL)
+ − 1098 {
+ − 1099 TRYFREE(pfile_in_zip_read_info);
+ − 1100 return UNZ_INTERNALERROR;
+ − 1101 }
+ − 1102
+ − 1103 pfile_in_zip_read_info->stream_initialised=0;
+ − 1104
+ − 1105 if (method!=NULL)
+ − 1106 *method = (int)s->cur_file_info.compression_method;
+ − 1107
+ − 1108 if (level!=NULL)
+ − 1109 {
+ − 1110 *level = 6;
+ − 1111 switch (s->cur_file_info.flag & 0x06)
+ − 1112 {
+ − 1113 case 6 : *level = 1; break;
+ − 1114 case 4 : *level = 2; break;
+ − 1115 case 2 : *level = 9; break;
+ − 1116 }
+ − 1117 }
+ − 1118
+ − 1119 if ((s->cur_file_info.compression_method!=0) &&
+ − 1120 (s->cur_file_info.compression_method!=Z_DEFLATED))
+ − 1121 err=UNZ_BADZIPFILE;
+ − 1122
+ − 1123 pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
+ − 1124 pfile_in_zip_read_info->crc32=0;
+ − 1125 pfile_in_zip_read_info->compression_method =
+ − 1126 s->cur_file_info.compression_method;
+ − 1127 pfile_in_zip_read_info->filestream=s->filestream;
+ − 1128 pfile_in_zip_read_info->z_filefunc=s->z_filefunc;
+ − 1129 pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
+ − 1130
+ − 1131 pfile_in_zip_read_info->stream.total_out = 0;
+ − 1132
+ − 1133 if ((s->cur_file_info.compression_method==Z_DEFLATED) &&
+ − 1134 (!raw))
+ − 1135 {
+ − 1136 pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
+ − 1137 pfile_in_zip_read_info->stream.zfree = (free_func)0;
+ − 1138 pfile_in_zip_read_info->stream.opaque = (voidpf)0;
+ − 1139 pfile_in_zip_read_info->stream.next_in = (voidpf)0;
+ − 1140 pfile_in_zip_read_info->stream.avail_in = 0;
+ − 1141
+ − 1142 err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
+ − 1143 if (err == Z_OK)
+ − 1144 pfile_in_zip_read_info->stream_initialised=1;
+ − 1145 else
+ − 1146 {
+ − 1147 TRYFREE(pfile_in_zip_read_info);
+ − 1148 return err;
+ − 1149 }
+ − 1150 /* windowBits is passed < 0 to tell that there is no zlib header.
+ − 1151 * Note that in this case inflate *requires* an extra "dummy" byte
+ − 1152 * after the compressed stream in order to complete decompression and
+ − 1153 * return Z_STREAM_END.
+ − 1154 * In unzip, i don't wait absolutely Z_STREAM_END because I known the
+ − 1155 * size of both compressed and uncompressed data
+ − 1156 */
+ − 1157 }
+ − 1158 pfile_in_zip_read_info->rest_read_compressed =
+ − 1159 s->cur_file_info.compressed_size ;
+ − 1160 pfile_in_zip_read_info->rest_read_uncompressed =
+ − 1161 s->cur_file_info.uncompressed_size ;
+ − 1162
+ − 1163
+ − 1164 pfile_in_zip_read_info->pos_in_zipfile =
+ − 1165 s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER +
+ − 1166 iSizeVar;
+ − 1167
+ − 1168 pfile_in_zip_read_info->stream.avail_in = (uInt)0;
+ − 1169
+ − 1170 s->pfile_in_zip_read = pfile_in_zip_read_info;
+ − 1171
+ − 1172 # ifndef NOUNCRYPT
+ − 1173 if (password != NULL)
+ − 1174 {
+ − 1175 int i;
+ − 1176 s->pcrc_32_tab = get_crc_table();
+ − 1177 init_keys(password,s->keys,s->pcrc_32_tab);
+ − 1178 if (ZSEEK(s->z_filefunc, s->filestream,
+ − 1179 s->pfile_in_zip_read->pos_in_zipfile +
+ − 1180 s->pfile_in_zip_read->byte_before_the_zipfile,
+ − 1181 SEEK_SET)!=0)
+ − 1182 return UNZ_INTERNALERROR;
+ − 1183 if(ZREAD(s->z_filefunc, s->filestream,source, 12)<12)
+ − 1184 return UNZ_INTERNALERROR;
+ − 1185
+ − 1186 for (i = 0; i<12; i++)
+ − 1187 zdecode(s->keys,s->pcrc_32_tab,source[i]);
+ − 1188
+ − 1189 s->pfile_in_zip_read->pos_in_zipfile+=12;
+ − 1190 s->encrypted=1;
+ − 1191 }
+ − 1192 # endif
+ − 1193
+ − 1194
+ − 1195 return UNZ_OK;
+ − 1196 }
+ − 1197
+ − 1198 extern int ZEXPORT unzOpenCurrentFile (file)
+ − 1199 unzFile file;
+ − 1200 {
+ − 1201 return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL);
+ − 1202 }
+ − 1203
+ − 1204 extern int ZEXPORT unzOpenCurrentFilePassword (file, password)
+ − 1205 unzFile file;
+ − 1206 const char* password;
+ − 1207 {
+ − 1208 return unzOpenCurrentFile3(file, NULL, NULL, 0, password);
+ − 1209 }
+ − 1210
+ − 1211 extern int ZEXPORT unzOpenCurrentFile2 (file,method,level,raw)
+ − 1212 unzFile file;
+ − 1213 int* method;
+ − 1214 int* level;
+ − 1215 int raw;
+ − 1216 {
+ − 1217 return unzOpenCurrentFile3(file, method, level, raw, NULL);
+ − 1218 }
+ − 1219
+ − 1220 /*
+ − 1221 Read bytes from the current file.
+ − 1222 buf contain buffer where data must be copied
+ − 1223 len the size of buf.
+ − 1224
+ − 1225 return the number of byte copied if somes bytes are copied
+ − 1226 return 0 if the end of file was reached
+ − 1227 return <0 with error code if there is an error
+ − 1228 (UNZ_ERRNO for IO error, or zLib error for uncompress error)
+ − 1229 */
+ − 1230 extern int ZEXPORT unzReadCurrentFile (file, buf, len)
+ − 1231 unzFile file;
+ − 1232 voidp buf;
+ − 1233 unsigned len;
+ − 1234 {
+ − 1235 int err=UNZ_OK;
+ − 1236 uInt iRead = 0;
+ − 1237 unz_s* s;
+ − 1238 file_in_zip_read_info_s* pfile_in_zip_read_info;
+ − 1239 if (file==NULL)
+ − 1240 return UNZ_PARAMERROR;
+ − 1241 s=(unz_s*)file;
+ − 1242 pfile_in_zip_read_info=s->pfile_in_zip_read;
+ − 1243
+ − 1244 if (pfile_in_zip_read_info==NULL)
+ − 1245 return UNZ_PARAMERROR;
+ − 1246
+ − 1247
+ − 1248 if ((pfile_in_zip_read_info->read_buffer == NULL))
+ − 1249 return UNZ_END_OF_LIST_OF_FILE;
+ − 1250 if (len==0)
+ − 1251 return 0;
+ − 1252
+ − 1253 pfile_in_zip_read_info->stream.next_out = (Bytef*)buf;
+ − 1254
+ − 1255 pfile_in_zip_read_info->stream.avail_out = (uInt)len;
+ − 1256
+ − 1257 if ((len>pfile_in_zip_read_info->rest_read_uncompressed) &&
+ − 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_uncompressed;
+ − 1261
+ − 1262 if ((len>pfile_in_zip_read_info->rest_read_compressed+
+ − 1263 pfile_in_zip_read_info->stream.avail_in) &&
+ − 1264 (pfile_in_zip_read_info->raw))
+ − 1265 pfile_in_zip_read_info->stream.avail_out =
+ − 1266 (uInt)pfile_in_zip_read_info->rest_read_compressed+
+ − 1267 pfile_in_zip_read_info->stream.avail_in;
+ − 1268
+ − 1269 while (pfile_in_zip_read_info->stream.avail_out>0)
+ − 1270 {
+ − 1271 if ((pfile_in_zip_read_info->stream.avail_in==0) &&
+ − 1272 (pfile_in_zip_read_info->rest_read_compressed>0))
+ − 1273 {
+ − 1274 uInt uReadThis = UNZ_BUFSIZE;
+ − 1275 if (pfile_in_zip_read_info->rest_read_compressed<uReadThis)
+ − 1276 uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
+ − 1277 if (uReadThis == 0)
+ − 1278 return UNZ_EOF;
+ − 1279 if (ZSEEK(pfile_in_zip_read_info->z_filefunc,
+ − 1280 pfile_in_zip_read_info->filestream,
+ − 1281 pfile_in_zip_read_info->pos_in_zipfile +
+ − 1282 pfile_in_zip_read_info->byte_before_the_zipfile,
+ − 1283 ZLIB_FILEFUNC_SEEK_SET)!=0)
+ − 1284 return UNZ_ERRNO;
+ − 1285 if (ZREAD(pfile_in_zip_read_info->z_filefunc,
+ − 1286 pfile_in_zip_read_info->filestream,
+ − 1287 pfile_in_zip_read_info->read_buffer,
+ − 1288 uReadThis)!=uReadThis)
+ − 1289 return UNZ_ERRNO;
+ − 1290
+ − 1291
+ − 1292 # ifndef NOUNCRYPT
+ − 1293 if(s->encrypted)
+ − 1294 {
+ − 1295 uInt i;
+ − 1296 for(i=0;i<uReadThis;i++)
+ − 1297 pfile_in_zip_read_info->read_buffer[i] =
+ − 1298 zdecode(s->keys,s->pcrc_32_tab,
+ − 1299 pfile_in_zip_read_info->read_buffer[i]);
+ − 1300 }
+ − 1301 # endif
+ − 1302
+ − 1303
+ − 1304 pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
+ − 1305
+ − 1306 pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
+ − 1307
+ − 1308 pfile_in_zip_read_info->stream.next_in =
+ − 1309 (Bytef*)pfile_in_zip_read_info->read_buffer;
+ − 1310 pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
+ − 1311 }
+ − 1312
+ − 1313 if ((pfile_in_zip_read_info->compression_method==0) || (pfile_in_zip_read_info->raw))
+ − 1314 {
+ − 1315 uInt uDoCopy,i ;
+ − 1316
+ − 1317 if ((pfile_in_zip_read_info->stream.avail_in == 0) &&
+ − 1318 (pfile_in_zip_read_info->rest_read_compressed == 0))
+ − 1319 return (iRead==0) ? UNZ_EOF : iRead;
+ − 1320
+ − 1321 if (pfile_in_zip_read_info->stream.avail_out <
+ − 1322 pfile_in_zip_read_info->stream.avail_in)
+ − 1323 uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
+ − 1324 else
+ − 1325 uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
+ − 1326
+ − 1327 for (i=0;i<uDoCopy;i++)
+ − 1328 *(pfile_in_zip_read_info->stream.next_out+i) =
+ − 1329 *(pfile_in_zip_read_info->stream.next_in+i);
+ − 1330
+ − 1331 pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,
+ − 1332 pfile_in_zip_read_info->stream.next_out,
+ − 1333 uDoCopy);
+ − 1334 pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
+ − 1335 pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
+ − 1336 pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
+ − 1337 pfile_in_zip_read_info->stream.next_out += uDoCopy;
+ − 1338 pfile_in_zip_read_info->stream.next_in += uDoCopy;
+ − 1339 pfile_in_zip_read_info->stream.total_out += uDoCopy;
+ − 1340 iRead += uDoCopy;
+ − 1341 }
+ − 1342 else
+ − 1343 {
+ − 1344 uLong uTotalOutBefore,uTotalOutAfter;
+ − 1345 const Bytef *bufBefore;
+ − 1346 uLong uOutThis;
+ − 1347 int flush=Z_SYNC_FLUSH;
+ − 1348
+ − 1349 uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
+ − 1350 bufBefore = pfile_in_zip_read_info->stream.next_out;
+ − 1351
+ − 1352 /*
+ − 1353 if ((pfile_in_zip_read_info->rest_read_uncompressed ==
+ − 1354 pfile_in_zip_read_info->stream.avail_out) &&
+ − 1355 (pfile_in_zip_read_info->rest_read_compressed == 0))
+ − 1356 flush = Z_FINISH;
+ − 1357 */
+ − 1358 err=inflate(&pfile_in_zip_read_info->stream,flush);
+ − 1359
+ − 1360 if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL))
+ − 1361 err = Z_DATA_ERROR;
+ − 1362
+ − 1363 uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
+ − 1364 uOutThis = uTotalOutAfter-uTotalOutBefore;
+ − 1365
+ − 1366 pfile_in_zip_read_info->crc32 =
+ − 1367 crc32(pfile_in_zip_read_info->crc32,bufBefore,
+ − 1368 (uInt)(uOutThis));
+ − 1369
+ − 1370 pfile_in_zip_read_info->rest_read_uncompressed -=
+ − 1371 uOutThis;
+ − 1372
+ − 1373 iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
+ − 1374
+ − 1375 if (err==Z_STREAM_END)
+ − 1376 return (iRead==0) ? UNZ_EOF : iRead;
+ − 1377 if (err!=Z_OK)
+ − 1378 break;
+ − 1379 }
+ − 1380 }
+ − 1381
+ − 1382 if (err==Z_OK)
+ − 1383 return iRead;
+ − 1384 return err;
+ − 1385 }
+ − 1386
+ − 1387
+ − 1388 /*
+ − 1389 Give the current position in uncompressed data
+ − 1390 */
+ − 1391 extern z_off_t ZEXPORT unztell (file)
+ − 1392 unzFile file;
+ − 1393 {
+ − 1394 unz_s* s;
+ − 1395 file_in_zip_read_info_s* pfile_in_zip_read_info;
+ − 1396 if (file==NULL)
+ − 1397 return UNZ_PARAMERROR;
+ − 1398 s=(unz_s*)file;
+ − 1399 pfile_in_zip_read_info=s->pfile_in_zip_read;
+ − 1400
+ − 1401 if (pfile_in_zip_read_info==NULL)
+ − 1402 return UNZ_PARAMERROR;
+ − 1403
+ − 1404 return (z_off_t)pfile_in_zip_read_info->stream.total_out;
+ − 1405 }
+ − 1406
+ − 1407
+ − 1408 /*
+ − 1409 return 1 if the end of file was reached, 0 elsewhere
+ − 1410 */
+ − 1411 extern int ZEXPORT unzeof (file)
+ − 1412 unzFile file;
+ − 1413 {
+ − 1414 unz_s* s;
+ − 1415 file_in_zip_read_info_s* pfile_in_zip_read_info;
+ − 1416 if (file==NULL)
+ − 1417 return UNZ_PARAMERROR;
+ − 1418 s=(unz_s*)file;
+ − 1419 pfile_in_zip_read_info=s->pfile_in_zip_read;
+ − 1420
+ − 1421 if (pfile_in_zip_read_info==NULL)
+ − 1422 return UNZ_PARAMERROR;
+ − 1423
+ − 1424 if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
+ − 1425 return 1;
+ − 1426 else
+ − 1427 return 0;
+ − 1428 }
+ − 1429
+ − 1430
+ − 1431
+ − 1432 /*
+ − 1433 Read extra field from the current file (opened by unzOpenCurrentFile)
+ − 1434 This is the local-header version of the extra field (sometimes, there is
+ − 1435 more info in the local-header version than in the central-header)
+ − 1436
+ − 1437 if buf==NULL, it return the size of the local extra field that can be read
+ − 1438
+ − 1439 if buf!=NULL, len is the size of the buffer, the extra header is copied in
+ − 1440 buf.
+ − 1441 the return value is the number of bytes copied in buf, or (if <0)
+ − 1442 the error code
+ − 1443 */
+ − 1444 extern int ZEXPORT unzGetLocalExtrafield (file,buf,len)
+ − 1445 unzFile file;
+ − 1446 voidp buf;
+ − 1447 unsigned len;
+ − 1448 {
+ − 1449 unz_s* s;
+ − 1450 file_in_zip_read_info_s* pfile_in_zip_read_info;
+ − 1451 uInt read_now;
+ − 1452 uLong size_to_read;
+ − 1453
+ − 1454 if (file==NULL)
+ − 1455 return UNZ_PARAMERROR;
+ − 1456 s=(unz_s*)file;
+ − 1457 pfile_in_zip_read_info=s->pfile_in_zip_read;
+ − 1458
+ − 1459 if (pfile_in_zip_read_info==NULL)
+ − 1460 return UNZ_PARAMERROR;
+ − 1461
+ − 1462 size_to_read = (pfile_in_zip_read_info->size_local_extrafield -
+ − 1463 pfile_in_zip_read_info->pos_local_extrafield);
+ − 1464
+ − 1465 if (buf==NULL)
+ − 1466 return (int)size_to_read;
+ − 1467
+ − 1468 if (len>size_to_read)
+ − 1469 read_now = (uInt)size_to_read;
+ − 1470 else
+ − 1471 read_now = (uInt)len ;
+ − 1472
+ − 1473 if (read_now==0)
+ − 1474 return 0;
+ − 1475
+ − 1476 if (ZSEEK(pfile_in_zip_read_info->z_filefunc,
+ − 1477 pfile_in_zip_read_info->filestream,
+ − 1478 pfile_in_zip_read_info->offset_local_extrafield +
+ − 1479 pfile_in_zip_read_info->pos_local_extrafield,
+ − 1480 ZLIB_FILEFUNC_SEEK_SET)!=0)
+ − 1481 return UNZ_ERRNO;
+ − 1482
+ − 1483 if (ZREAD(pfile_in_zip_read_info->z_filefunc,
+ − 1484 pfile_in_zip_read_info->filestream,
+ − 1485 buf,read_now)!=read_now)
+ − 1486 return UNZ_ERRNO;
+ − 1487
+ − 1488 return (int)read_now;
+ − 1489 }
+ − 1490
+ − 1491 /*
+ − 1492 Close the file in zip opened with unzipOpenCurrentFile
+ − 1493 Return UNZ_CRCERROR if all the file was read but the CRC is not good
+ − 1494 */
+ − 1495 extern int ZEXPORT unzCloseCurrentFile (file)
+ − 1496 unzFile file;
+ − 1497 {
+ − 1498 int err=UNZ_OK;
+ − 1499
+ − 1500 unz_s* s;
+ − 1501 file_in_zip_read_info_s* pfile_in_zip_read_info;
+ − 1502 if (file==NULL)
+ − 1503 return UNZ_PARAMERROR;
+ − 1504 s=(unz_s*)file;
+ − 1505 pfile_in_zip_read_info=s->pfile_in_zip_read;
+ − 1506
+ − 1507 if (pfile_in_zip_read_info==NULL)
+ − 1508 return UNZ_PARAMERROR;
+ − 1509
+ − 1510
+ − 1511 if ((pfile_in_zip_read_info->rest_read_uncompressed == 0) &&
+ − 1512 (!pfile_in_zip_read_info->raw))
+ − 1513 {
+ − 1514 if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait)
+ − 1515 err=UNZ_CRCERROR;
+ − 1516 }
+ − 1517
+ − 1518
+ − 1519 TRYFREE(pfile_in_zip_read_info->read_buffer);
+ − 1520 pfile_in_zip_read_info->read_buffer = NULL;
+ − 1521 if (pfile_in_zip_read_info->stream_initialised)
+ − 1522 inflateEnd(&pfile_in_zip_read_info->stream);
+ − 1523
+ − 1524 pfile_in_zip_read_info->stream_initialised = 0;
+ − 1525 TRYFREE(pfile_in_zip_read_info);
+ − 1526
+ − 1527 s->pfile_in_zip_read=NULL;
+ − 1528
+ − 1529 return err;
+ − 1530 }
+ − 1531
+ − 1532
+ − 1533 /*
+ − 1534 Get the global comment string of the ZipFile, in the szComment buffer.
+ − 1535 uSizeBuf is the size of the szComment buffer.
+ − 1536 return the number of byte copied or an error code <0
+ − 1537 */
+ − 1538 extern int ZEXPORT unzGetGlobalComment (file, szComment, uSizeBuf)
+ − 1539 unzFile file;
+ − 1540 char *szComment;
+ − 1541 uLong uSizeBuf;
+ − 1542 {
+ − 1543 unz_s* s;
+ − 1544 uLong uReadThis ;
+ − 1545 if (file==NULL)
+ − 1546 return UNZ_PARAMERROR;
+ − 1547 s=(unz_s*)file;
+ − 1548
+ − 1549 uReadThis = uSizeBuf;
+ − 1550 if (uReadThis>s->gi.size_comment)
+ − 1551 uReadThis = s->gi.size_comment;
+ − 1552
+ − 1553 if (ZSEEK(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_SET)!=0)
+ − 1554 return UNZ_ERRNO;
+ − 1555
+ − 1556 if (uReadThis>0)
+ − 1557 {
+ − 1558 *szComment='\0';
+ − 1559 if (ZREAD(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis)
+ − 1560 return UNZ_ERRNO;
+ − 1561 }
+ − 1562
+ − 1563 if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
+ − 1564 *(szComment+s->gi.size_comment)='\0';
+ − 1565 return (int)uReadThis;
+ − 1566 }
+ − 1567
+ − 1568 /* Additions by RX '2004 */
+ − 1569 extern uLong ZEXPORT unzGetOffset (file)
+ − 1570 unzFile file;
+ − 1571 {
+ − 1572 unz_s* s;
+ − 1573
+ − 1574 if (file==NULL)
+ − 1575 return UNZ_PARAMERROR;
+ − 1576 s=(unz_s*)file;
+ − 1577 if (!s->current_file_ok)
+ − 1578 return 0;
+ − 1579 if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff)
+ − 1580 if (s->num_file==s->gi.number_entry)
+ − 1581 return 0;
+ − 1582 return s->pos_in_central_dir;
+ − 1583 }
+ − 1584
+ − 1585 extern int ZEXPORT unzSetOffset (file, pos)
+ − 1586 unzFile file;
+ − 1587 uLong pos;
+ − 1588 {
+ − 1589 unz_s* s;
+ − 1590 int err;
+ − 1591
+ − 1592 if (file==NULL)
+ − 1593 return UNZ_PARAMERROR;
+ − 1594 s=(unz_s*)file;
+ − 1595
+ − 1596 s->pos_in_central_dir = pos;
+ − 1597 s->num_file = s->gi.number_entry; /* hack */
+ − 1598 err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
+ − 1599 &s->cur_file_info_internal,
+ − 1600 NULL,0,NULL,0,NULL,0);
+ − 1601 s->current_file_ok = (err == UNZ_OK);
+ − 1602 return err;
+ − 1603 }