1 /* unzip.c -- IO for uncompress .zip files using zlib
2 Version 1.1, February 14h, 2010
3 part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
4
5 Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
6
7 Modifications of Unzip for Zip64
8 Copyright (C) 2007-2008 Even Rouault
9
10 Modifications for Zip64 support on both zip and unzip
11 Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
12
13 For more info read MiniZip_info.txt
14
15
16 ------------------------------------------------------------------------------------
17 Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of
18 compatibility with older software. The following is from the original crypt.c.
19 Code woven in by Terry Thorsen 1/2003.
20
21 Copyright (c) 1990-2000 Info-ZIP. All rights reserved.
22
23 See the accompanying file LICENSE, version 2000-Apr-09 or later
24 (the contents of which are also included in zip.h) for terms of use.
25 If, for some reason, all these files are missing, the Info-ZIP license
26 also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
27
28 crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h]
29
30 The encryption/decryption parts of this source code (as opposed to the
31 non-echoing password parts) were originally written in Europe. The
32 whole source package can be freely distributed, including from the USA.
33 (Prior to January 2000, re-export from the US was a violation of US law.)
34
35 This encryption code is a direct transcription of the algorithm from
36 Roger Schlafly, described by Phil Katz in the file appnote.txt. This
37 file (appnote.txt) is distributed with the PKZIP program (even in the
38 version without encryption capabilities).
39
40 ------------------------------------------------------------------------------------
41
42 Changes in unzip.c
43
44 2007-2008 - Even Rouault - Addition of cpl_unzGetCurrentFileZStreamPos
45 2007-2008 - Even Rouault - Decoration of symbol names unz* -> cpl_unz*
46 2007-2008 - Even Rouault - Remove old C style function prototypes
47 2007-2008 - Even Rouault - Add unzip support for ZIP64
48
49 Copyright (C) 2007-2008 Even Rouault
50
51
52 Oct-2009 - Mathias Svensson - Removed cpl_* from symbol names (Even Rouault added them but since this is now moved to a new project (minizip64) I renamed them again).
53 Oct-2009 - Mathias Svensson - Fixed problem if uncompressed size was > 4G and compressed size was <4G
54 should only read the compressed/uncompressed size from the Zip64 format if
55 the size from normal header was 0xFFFFFFFF
56 Oct-2009 - Mathias Svensson - Applied some bug fixes from paches recived from Gilles Vollant
57 Oct-2009 - Mathias Svensson - Applied support to unzip files with compression mathod BZIP2 (bzip2 lib is required)
58 Patch created by Daniel Borca
59
60 Jan-2010 - back to unzip and minizip 1.0 name scheme, with compatibility layer
61
62 Copyright (C) 1998 - 2010 Gilles Vollant, Even Rouault, Mathias Svensson
63
64 */
65
66
67 #include <stdio.h>
68 #include <stdlib.h>
69 #include <string.h>
70
71 #ifndef NOUNCRYPT
72 #define NOUNCRYPT
73 #endif
74
75 #include "zlib.h"
76 #include "unzip.h"
77
78 #ifdef STDC
79 # include <stddef.h>
80 # include <string.h>
81 # include <stdlib.h>
82 #endif
83 #ifdef NO_ERRNO_H
84 extern int errno;
85 #else
86 # include <errno.h>
87 #endif
88
89
90 #ifndef local
91 # define local static
92 #endif
93 /* compile with -Dlocal if your debugger can't find static symbols */
94
95
96 #ifndef CASESENSITIVITYDEFAULT_NO
97 # if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES)
98 # define CASESENSITIVITYDEFAULT_NO
99 # endif
100 #endif
101
102
103 #ifndef UNZ_BUFSIZE
104 #define UNZ_BUFSIZE (16384)
105 #endif
106
107 #ifndef UNZ_MAXFILENAMEINZIP
108 #define UNZ_MAXFILENAMEINZIP (256)
109 #endif
110
111 #ifndef ALLOC
112 # define ALLOC(size) (malloc(size))
113 #endif
114 #ifndef TRYFREE
115 # define TRYFREE(p) {if (p) free(p);}
116 #endif
117
118 #define SIZECENTRALDIRITEM (0x2e)
119 #define SIZEZIPLOCALHEADER (0x1e)
120
121
122 const char unz_copyright[] =
123 " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
124
125 /* unz_file_info_interntal contain internal info about a file in zipfile*/
126 typedef struct unz_file_info64_internal_s
127 {
128 ZPOS64_T offset_curfile;/* relative offset of local header 8 bytes */
129 } unz_file_info64_internal;
130
131
132 /* file_in_zip_read_info_s contain internal information about a file in zipfile,
133 when reading and decompress it */
134 typedef struct
135 {
136 char *read_buffer; /* internal buffer for compressed data */
137 z_stream stream; /* zLib stream structure for inflate */
138
139 #ifdef HAVE_BZIP2
140 bz_stream bstream; /* bzLib stream structure for bziped */
141 #endif
142
143 ZPOS64_T pos_in_zipfile; /* position in byte on the zipfile, for fseek*/
144 uLong stream_initialised; /* flag set if stream structure is initialised*/
145
146 ZPOS64_T offset_local_extrafield;/* offset of the local extra field */
147 uInt size_local_extrafield;/* size of the local extra field */
148 ZPOS64_T pos_local_extrafield; /* position in the local extra field in read*/
149 ZPOS64_T total_out_64;
150
151 uLong crc32; /* crc32 of all data uncompressed */
152 uLong crc32_wait; /* crc32 we must obtain after decompress all */
153 ZPOS64_T rest_read_compressed; /* number of byte to be decompressed */
154 ZPOS64_T rest_read_uncompressed;/*number of byte to be obtained after decomp*/
155 zlib_filefunc64_32_def z_filefunc;
156 voidpf filestream; /* io structore of the zipfile */
157 uLong compression_method; /* compression method (0==store) */
158 ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
159 int raw;
160 } file_in_zip64_read_info_s;
161
162
163 /* unz64_s contain internal information about the zipfile
164 */
165 typedef struct
166 {
167 zlib_filefunc64_32_def z_filefunc;
168 int is64bitOpenFunction;
169 voidpf filestream; /* io structore of the zipfile */
170 unz_global_info64 gi; /* public global information */
171 ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
172 ZPOS64_T num_file; /* number of the current file in the zipfile*/
173 ZPOS64_T pos_in_central_dir; /* pos of the current file in the central dir*/
174 ZPOS64_T current_file_ok; /* flag about the usability of the current file*/
175 ZPOS64_T central_pos; /* position of the beginning of the central dir*/
176
177 ZPOS64_T size_central_dir; /* size of the central directory */
178 ZPOS64_T offset_central_dir; /* offset of start of central directory with
179 respect to the starting disk number */
180
181 unz_file_info64 cur_file_info; /* public info about the current file in zip*/
182 unz_file_info64_internal cur_file_info_internal; /* private info about it*/
183 file_in_zip64_read_info_s* pfile_in_zip_read; /* structure about the current
184 file if we are decompressing it */
185 int encrypted;
186
187 int isZip64;
188
189 # ifndef NOUNCRYPT
190 unsigned long keys[3]; /* keys defining the pseudo-random sequence */
191 const z_crc_t* pcrc_32_tab;
192 # endif
193 } unz64_s;
194
195
196 #ifndef NOUNCRYPT
197 #include "crypt.h"
198 #endif
199
200 /* ===========================================================================
201 Read a byte from a gz_stream; update next_in and avail_in. Return EOF
202 for end of file.
203 IN assertion: the stream s has been successfully opened for reading.
204 */
205
206
207 local int unz64local_getByte OF((
208 const zlib_filefunc64_32_def* pzlib_filefunc_def,
209 voidpf filestream,
210 int *pi));
211
unz64local_getByte(const zlib_filefunc64_32_def * pzlib_filefunc_def,voidpf filestream,int * pi)212 local int unz64local_getByte(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, int *pi)
213 {
214 unsigned char c;
215 int err = (int)ZREAD64(*pzlib_filefunc_def,filestream,&c,1);
216 if (err==1)
217 {
218 *pi = (int)c;
219 return UNZ_OK;
220 }
221 else
222 {
223 if (ZERROR64(*pzlib_filefunc_def,filestream))
224 return UNZ_ERRNO;
225 else
226 return UNZ_EOF;
227 }
228 }
229
230
231 /* ===========================================================================
232 Reads a long in LSB order from the given gz_stream. Sets
233 */
234 local int unz64local_getShort OF((
235 const zlib_filefunc64_32_def* pzlib_filefunc_def,
236 voidpf filestream,
237 uLong *pX));
238
unz64local_getShort(const zlib_filefunc64_32_def * pzlib_filefunc_def,voidpf filestream,uLong * pX)239 local int unz64local_getShort (const zlib_filefunc64_32_def* pzlib_filefunc_def,
240 voidpf filestream,
241 uLong *pX)
242 {
243 uLong x ;
244 int i = 0;
245 int err;
246
247 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
248 x = (uLong)i;
249
250 if (err==UNZ_OK)
251 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
252 x |= ((uLong)i)<<8;
253
254 if (err==UNZ_OK)
255 *pX = x;
256 else
257 *pX = 0;
258 return err;
259 }
260
261 local int unz64local_getLong OF((
262 const zlib_filefunc64_32_def* pzlib_filefunc_def,
263 voidpf filestream,
264 uLong *pX));
265
unz64local_getLong(const zlib_filefunc64_32_def * pzlib_filefunc_def,voidpf filestream,uLong * pX)266 local int unz64local_getLong (const zlib_filefunc64_32_def* pzlib_filefunc_def,
267 voidpf filestream,
268 uLong *pX)
269 {
270 uLong x ;
271 int i = 0;
272 int err;
273
274 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
275 x = (uLong)i;
276
277 if (err==UNZ_OK)
278 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
279 x |= ((uLong)i)<<8;
280
281 if (err==UNZ_OK)
282 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
283 x |= ((uLong)i)<<16;
284
285 if (err==UNZ_OK)
286 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
287 x += ((uLong)i)<<24;
288
289 if (err==UNZ_OK)
290 *pX = x;
291 else
292 *pX = 0;
293 return err;
294 }
295
296 local int unz64local_getLong64 OF((
297 const zlib_filefunc64_32_def* pzlib_filefunc_def,
298 voidpf filestream,
299 ZPOS64_T *pX));
300
301
unz64local_getLong64(const zlib_filefunc64_32_def * pzlib_filefunc_def,voidpf filestream,ZPOS64_T * pX)302 local int unz64local_getLong64 (const zlib_filefunc64_32_def* pzlib_filefunc_def,
303 voidpf filestream,
304 ZPOS64_T *pX)
305 {
306 ZPOS64_T x ;
307 int i = 0;
308 int err;
309
310 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
311 x = (ZPOS64_T)i;
312
313 if (err==UNZ_OK)
314 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
315 x |= ((ZPOS64_T)i)<<8;
316
317 if (err==UNZ_OK)
318 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
319 x |= ((ZPOS64_T)i)<<16;
320
321 if (err==UNZ_OK)
322 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
323 x |= ((ZPOS64_T)i)<<24;
324
325 if (err==UNZ_OK)
326 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
327 x |= ((ZPOS64_T)i)<<32;
328
329 if (err==UNZ_OK)
330 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
331 x |= ((ZPOS64_T)i)<<40;
332
333 if (err==UNZ_OK)
334 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
335 x |= ((ZPOS64_T)i)<<48;
336
337 if (err==UNZ_OK)
338 err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
339 x |= ((ZPOS64_T)i)<<56;
340
341 if (err==UNZ_OK)
342 *pX = x;
343 else
344 *pX = 0;
345 return err;
346 }
347
348 /* My own strcmpi / strcasecmp */
strcmpcasenosensitive_internal(const char * fileName1,const char * fileName2)349 local int strcmpcasenosensitive_internal (const char* fileName1, const char* fileName2)
350 {
351 for (;;)
352 {
353 char c1=*(fileName1++);
354 char c2=*(fileName2++);
355 if ((c1>='a') && (c1<='z'))
356 c1 -= 0x20;
357 if ((c2>='a') && (c2<='z'))
358 c2 -= 0x20;
359 if (c1=='\0')
360 return ((c2=='\0') ? 0 : -1);
361 if (c2=='\0')
362 return 1;
363 if (c1<c2)
364 return -1;
365 if (c1>c2)
366 return 1;
367 }
368 }
369
370
371 #ifdef CASESENSITIVITYDEFAULT_NO
372 #define CASESENSITIVITYDEFAULTVALUE 2
373 #else
374 #define CASESENSITIVITYDEFAULTVALUE 1
375 #endif
376
377 #ifndef STRCMPCASENOSENTIVEFUNCTION
378 #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
379 #endif
380
381 /*
382 Compare two filename (fileName1,fileName2).
383 If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
384 If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
385 or strcasecmp)
386 If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
387 (like 1 on Unix, 2 on Windows)
388
389 */
unzStringFileNameCompare(const char * fileName1,const char * fileName2,int iCaseSensitivity)390 extern int ZEXPORT unzStringFileNameCompare (const char* fileName1,
391 const char* fileName2,
392 int iCaseSensitivity)
393
394 {
395 if (iCaseSensitivity==0)
396 iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
397
398 if (iCaseSensitivity==1)
399 return strcmp(fileName1,fileName2);
400
401 return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
402 }
403
404 #ifndef BUFREADCOMMENT
405 #define BUFREADCOMMENT (0x400)
406 #endif
407
408 /*
409 Locate the Central directory of a zipfile (at the end, just before
410 the global comment)
411 */
412 local ZPOS64_T unz64local_SearchCentralDir OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream));
unz64local_SearchCentralDir(const zlib_filefunc64_32_def * pzlib_filefunc_def,voidpf filestream)413 local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream)
414 {
415 unsigned char* buf;
416 ZPOS64_T uSizeFile;
417 ZPOS64_T uBackRead;
418 ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
419 ZPOS64_T uPosFound=0;
420
421 if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
422 return 0;
423
424
425 uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
426
427 if (uMaxBack>uSizeFile)
428 uMaxBack = uSizeFile;
429
430 buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
431 if (buf==NULL)
432 return 0;
433
434 uBackRead = 4;
435 while (uBackRead<uMaxBack)
436 {
437 uLong uReadSize;
438 ZPOS64_T uReadPos ;
439 int i;
440 if (uBackRead+BUFREADCOMMENT>uMaxBack)
441 uBackRead = uMaxBack;
442 else
443 uBackRead+=BUFREADCOMMENT;
444 uReadPos = uSizeFile-uBackRead ;
445
446 uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
447 (BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
448 if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
449 break;
450
451 if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
452 break;
453
454 for (i=(int)uReadSize-3; (i--)>0;)
455 if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
456 ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
457 {
458 uPosFound = uReadPos+i;
459 break;
460 }
461
462 if (uPosFound!=0)
463 break;
464 }
465 TRYFREE(buf);
466 return uPosFound;
467 }
468
469
470 /*
471 Locate the Central directory 64 of a zipfile (at the end, just before
472 the global comment)
473 */
474 local ZPOS64_T unz64local_SearchCentralDir64 OF((
475 const zlib_filefunc64_32_def* pzlib_filefunc_def,
476 voidpf filestream));
477
unz64local_SearchCentralDir64(const zlib_filefunc64_32_def * pzlib_filefunc_def,voidpf filestream)478 local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib_filefunc_def,
479 voidpf filestream)
480 {
481 unsigned char* buf;
482 ZPOS64_T uSizeFile;
483 ZPOS64_T uBackRead;
484 ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
485 ZPOS64_T uPosFound=0;
486 uLong uL;
487 ZPOS64_T relativeOffset;
488
489 if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
490 return 0;
491
492
493 uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
494
495 if (uMaxBack>uSizeFile)
496 uMaxBack = uSizeFile;
497
498 buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
499 if (buf==NULL)
500 return 0;
501
502 uBackRead = 4;
503 while (uBackRead<uMaxBack)
504 {
505 uLong uReadSize;
506 ZPOS64_T uReadPos;
507 int i;
508 if (uBackRead+BUFREADCOMMENT>uMaxBack)
509 uBackRead = uMaxBack;
510 else
511 uBackRead+=BUFREADCOMMENT;
512 uReadPos = uSizeFile-uBackRead ;
513
514 uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
515 (BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
516 if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
517 break;
518
519 if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
520 break;
521
522 for (i=(int)uReadSize-3; (i--)>0;)
523 if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
524 ((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
525 {
526 uPosFound = uReadPos+i;
527 break;
528 }
529
530 if (uPosFound!=0)
531 break;
532 }
533 TRYFREE(buf);
534 if (uPosFound == 0)
535 return 0;
536
537 /* Zip64 end of central directory locator */
538 if (ZSEEK64(*pzlib_filefunc_def,filestream, uPosFound,ZLIB_FILEFUNC_SEEK_SET)!=0)
539 return 0;
540
541 /* the signature, already checked */
542 if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
543 return 0;
544
545 /* number of the disk with the start of the zip64 end of central directory */
546 if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
547 return 0;
548 if (uL != 0)
549 return 0;
550
551 /* relative offset of the zip64 end of central directory record */
552 if (unz64local_getLong64(pzlib_filefunc_def,filestream,&relativeOffset)!=UNZ_OK)
553 return 0;
554
555 /* total number of disks */
556 if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
557 return 0;
558 if (uL != 1)
559 return 0;
560
561 /* Goto end of central directory record */
562 if (ZSEEK64(*pzlib_filefunc_def,filestream, relativeOffset,ZLIB_FILEFUNC_SEEK_SET)!=0)
563 return 0;
564
565 /* the signature */
566 if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
567 return 0;
568
569 if (uL != 0x06064b50)
570 return 0;
571
572 return relativeOffset;
573 }
574
575 /*
576 Open a Zip file. path contain the full pathname (by example,
577 on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer
578 "zlib/zlib114.zip".
579 If the zipfile cannot be opened (file doesn't exist or in not valid), the
580 return value is NULL.
581 Else, the return value is a unzFile Handle, usable with other function
582 of this unzip package.
583 */
unzOpenInternal(const void * path,zlib_filefunc64_32_def * pzlib_filefunc64_32_def,int is64bitOpenFunction)584 local unzFile unzOpenInternal (const void *path,
585 zlib_filefunc64_32_def* pzlib_filefunc64_32_def,
586 int is64bitOpenFunction)
587 {
588 unz64_s us;
589 unz64_s *s;
590 ZPOS64_T central_pos;
591 uLong uL;
592
593 uLong number_disk; /* number of the current dist, used for
594 spaning ZIP, unsupported, always 0*/
595 uLong number_disk_with_CD; /* number the the disk with central dir, used
596 for spaning ZIP, unsupported, always 0*/
597 ZPOS64_T number_entry_CD; /* total number of entries in
598 the central dir
599 (same than number_entry on nospan) */
600
601 int err=UNZ_OK;
602
603 if (unz_copyright[0]!=' ')
604 return NULL;
605
606 us.z_filefunc.zseek32_file = NULL;
607 us.z_filefunc.ztell32_file = NULL;
608 if (pzlib_filefunc64_32_def==NULL)
609 fill_fopen64_filefunc(&us.z_filefunc.zfile_func64);
610 else
611 us.z_filefunc = *pzlib_filefunc64_32_def;
612 us.is64bitOpenFunction = is64bitOpenFunction;
613
614
615
616 us.filestream = ZOPEN64(us.z_filefunc,
617 path,
618 ZLIB_FILEFUNC_MODE_READ |
619 ZLIB_FILEFUNC_MODE_EXISTING);
620 if (us.filestream==NULL)
621 return NULL;
622
623 central_pos = unz64local_SearchCentralDir64(&us.z_filefunc,us.filestream);
624 if (central_pos)
625 {
626 uLong uS;
627 ZPOS64_T uL64;
628
629 us.isZip64 = 1;
630
631 if (ZSEEK64(us.z_filefunc, us.filestream,
632 central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
633 err=UNZ_ERRNO;
634
635 /* the signature, already checked */
636 if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
637 err=UNZ_ERRNO;
638
639 /* size of zip64 end of central directory record */
640 if (unz64local_getLong64(&us.z_filefunc, us.filestream,&uL64)!=UNZ_OK)
641 err=UNZ_ERRNO;
642
643 /* version made by */
644 if (unz64local_getShort(&us.z_filefunc, us.filestream,&uS)!=UNZ_OK)
645 err=UNZ_ERRNO;
646
647 /* version needed to extract */
648 if (unz64local_getShort(&us.z_filefunc, us.filestream,&uS)!=UNZ_OK)
649 err=UNZ_ERRNO;
650
651 /* number of this disk */
652 if (unz64local_getLong(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)
653 err=UNZ_ERRNO;
654
655 /* number of the disk with the start of the central directory */
656 if (unz64local_getLong(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)
657 err=UNZ_ERRNO;
658
659 /* total number of entries in the central directory on this disk */
660 if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.gi.number_entry)!=UNZ_OK)
661 err=UNZ_ERRNO;
662
663 /* total number of entries in the central directory */
664 if (unz64local_getLong64(&us.z_filefunc, us.filestream,&number_entry_CD)!=UNZ_OK)
665 err=UNZ_ERRNO;
666
667 if ((number_entry_CD!=us.gi.number_entry) ||
668 (number_disk_with_CD!=0) ||
669 (number_disk!=0))
670 err=UNZ_BADZIPFILE;
671
672 /* size of the central directory */
673 if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.size_central_dir)!=UNZ_OK)
674 err=UNZ_ERRNO;
675
676 /* offset of start of central directory with respect to the
677 starting disk number */
678 if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.offset_central_dir)!=UNZ_OK)
679 err=UNZ_ERRNO;
680
681 us.gi.size_comment = 0;
682 }
683 else
684 {
685 central_pos = unz64local_SearchCentralDir(&us.z_filefunc,us.filestream);
686 if (central_pos==0)
687 err=UNZ_ERRNO;
688
689 us.isZip64 = 0;
690
691 if (ZSEEK64(us.z_filefunc, us.filestream,
692 central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
693 err=UNZ_ERRNO;
694
695 /* the signature, already checked */
696 if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
697 err=UNZ_ERRNO;
698
699 /* number of this disk */
700 if (unz64local_getShort(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)
701 err=UNZ_ERRNO;
702
703 /* number of the disk with the start of the central directory */
704 if (unz64local_getShort(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)
705 err=UNZ_ERRNO;
706
707 /* total number of entries in the central dir on this disk */
708 if (unz64local_getShort(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
709 err=UNZ_ERRNO;
710 us.gi.number_entry = uL;
711
712 /* total number of entries in the central dir */
713 if (unz64local_getShort(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
714 err=UNZ_ERRNO;
715 number_entry_CD = uL;
716
717 if ((number_entry_CD!=us.gi.number_entry) ||
718 (number_disk_with_CD!=0) ||
719 (number_disk!=0))
720 err=UNZ_BADZIPFILE;
721
722 /* size of the central directory */
723 if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
724 err=UNZ_ERRNO;
725 us.size_central_dir = uL;
726
727 /* offset of start of central directory with respect to the
728 starting disk number */
729 if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
730 err=UNZ_ERRNO;
731 us.offset_central_dir = uL;
732
733 /* zipfile comment length */
734 if (unz64local_getShort(&us.z_filefunc, us.filestream,&us.gi.size_comment)!=UNZ_OK)
735 err=UNZ_ERRNO;
736 }
737
738 if ((central_pos<us.offset_central_dir+us.size_central_dir) &&
739 (err==UNZ_OK))
740 err=UNZ_BADZIPFILE;
741
742 if (err!=UNZ_OK)
743 {
744 ZCLOSE64(us.z_filefunc, us.filestream);
745 return NULL;
746 }
747
748 us.byte_before_the_zipfile = central_pos -
749 (us.offset_central_dir+us.size_central_dir);
750 us.central_pos = central_pos;
751 us.pfile_in_zip_read = NULL;
752 us.encrypted = 0;
753
754
755 s=(unz64_s*)ALLOC(sizeof(unz64_s));
756 if( s != NULL)
757 {
758 *s=us;
759 unzGoToFirstFile((unzFile)s);
760 }
761 return (unzFile)s;
762 }
763
764
unzOpen2(const char * path,zlib_filefunc_def * pzlib_filefunc32_def)765 extern unzFile ZEXPORT unzOpen2 (const char *path,
766 zlib_filefunc_def* pzlib_filefunc32_def)
767 {
768 if (pzlib_filefunc32_def != NULL)
769 {
770 zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
771 fill_zlib_filefunc64_32_def_from_filefunc32(&zlib_filefunc64_32_def_fill,pzlib_filefunc32_def);
772 return unzOpenInternal(path, &zlib_filefunc64_32_def_fill, 0);
773 }
774 else
775 return unzOpenInternal(path, NULL, 0);
776 }
777
unzOpen2_64(const void * path,zlib_filefunc64_def * pzlib_filefunc_def)778 extern unzFile ZEXPORT unzOpen2_64 (const void *path,
779 zlib_filefunc64_def* pzlib_filefunc_def)
780 {
781 if (pzlib_filefunc_def != NULL)
782 {
783 zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
784 zlib_filefunc64_32_def_fill.zfile_func64 = *pzlib_filefunc_def;
785 zlib_filefunc64_32_def_fill.ztell32_file = NULL;
786 zlib_filefunc64_32_def_fill.zseek32_file = NULL;
787 return unzOpenInternal(path, &zlib_filefunc64_32_def_fill, 1);
788 }
789 else
790 return unzOpenInternal(path, NULL, 1);
791 }
792
unzOpen(const char * path)793 extern unzFile ZEXPORT unzOpen (const char *path)
794 {
795 return unzOpenInternal(path, NULL, 0);
796 }
797
unzOpen64(const void * path)798 extern unzFile ZEXPORT unzOpen64 (const void *path)
799 {
800 return unzOpenInternal(path, NULL, 1);
801 }
802
803 /*
804 Close a ZipFile opened with unzOpen.
805 If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
806 these files MUST be closed with unzCloseCurrentFile before call unzClose.
807 return UNZ_OK if there is no problem. */
unzClose(unzFile file)808 extern int ZEXPORT unzClose (unzFile file)
809 {
810 unz64_s* s;
811 if (file==NULL)
812 return UNZ_PARAMERROR;
813 s=(unz64_s*)file;
814
815 if (s->pfile_in_zip_read!=NULL)
816 unzCloseCurrentFile(file);
817
818 ZCLOSE64(s->z_filefunc, s->filestream);
819 TRYFREE(s);
820 return UNZ_OK;
821 }
822
823
824 /*
825 Write info about the ZipFile in the *pglobal_info structure.
826 No preparation of the structure is needed
827 return UNZ_OK if there is no problem. */
unzGetGlobalInfo64(unzFile file,unz_global_info64 * pglobal_info)828 extern int ZEXPORT unzGetGlobalInfo64 (unzFile file, unz_global_info64* pglobal_info)
829 {
830 unz64_s* s;
831 if (file==NULL)
832 return UNZ_PARAMERROR;
833 s=(unz64_s*)file;
834 *pglobal_info=s->gi;
835 return UNZ_OK;
836 }
837
unzGetGlobalInfo(unzFile file,unz_global_info * pglobal_info32)838 extern int ZEXPORT unzGetGlobalInfo (unzFile file, unz_global_info* pglobal_info32)
839 {
840 unz64_s* s;
841 if (file==NULL)
842 return UNZ_PARAMERROR;
843 s=(unz64_s*)file;
844 /* to do : check if number_entry is not truncated */
845 pglobal_info32->number_entry = (uLong)s->gi.number_entry;
846 pglobal_info32->size_comment = s->gi.size_comment;
847 return UNZ_OK;
848 }
849 /*
850 Translate date/time from Dos format to tm_unz (readable more easilty)
851 */
unz64local_DosDateToTmuDate(ZPOS64_T ulDosDate,tm_unz * ptm)852 local void unz64local_DosDateToTmuDate (ZPOS64_T ulDosDate, tm_unz* ptm)
853 {
854 ZPOS64_T uDate;
855 uDate = (ZPOS64_T)(ulDosDate>>16);
856 ptm->tm_mday = (uInt)(uDate&0x1f) ;
857 ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1) ;
858 ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
859
860 ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
861 ptm->tm_min = (uInt) ((ulDosDate&0x7E0)/0x20) ;
862 ptm->tm_sec = (uInt) (2*(ulDosDate&0x1f)) ;
863 }
864
865 /*
866 Get Info about the current file in the zipfile, with internal only info
867 */
868 local int unz64local_GetCurrentFileInfoInternal OF((unzFile file,
869 unz_file_info64 *pfile_info,
870 unz_file_info64_internal
871 *pfile_info_internal,
872 char *szFileName,
873 uLong fileNameBufferSize,
874 void *extraField,
875 uLong extraFieldBufferSize,
876 char *szComment,
877 uLong commentBufferSize));
878
unz64local_GetCurrentFileInfoInternal(unzFile file,unz_file_info64 * pfile_info,unz_file_info64_internal * pfile_info_internal,char * szFileName,uLong fileNameBufferSize,void * extraField,uLong extraFieldBufferSize,char * szComment,uLong commentBufferSize)879 local int unz64local_GetCurrentFileInfoInternal (unzFile file,
880 unz_file_info64 *pfile_info,
881 unz_file_info64_internal
882 *pfile_info_internal,
883 char *szFileName,
884 uLong fileNameBufferSize,
885 void *extraField,
886 uLong extraFieldBufferSize,
887 char *szComment,
888 uLong commentBufferSize)
889 {
890 unz64_s* s;
891 unz_file_info64 file_info;
892 unz_file_info64_internal file_info_internal;
893 int err=UNZ_OK;
894 uLong uMagic;
895 long lSeek=0;
896 uLong uL;
897
898 if (file==NULL)
899 return UNZ_PARAMERROR;
900 s=(unz64_s*)file;
901 if (ZSEEK64(s->z_filefunc, s->filestream,
902 s->pos_in_central_dir+s->byte_before_the_zipfile,
903 ZLIB_FILEFUNC_SEEK_SET)!=0)
904 err=UNZ_ERRNO;
905
906
907 /* we check the magic */
908 if (err==UNZ_OK)
909 {
910 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
911 err=UNZ_ERRNO;
912 else if (uMagic!=0x02014b50)
913 err=UNZ_BADZIPFILE;
914 }
915
916 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.version) != UNZ_OK)
917 err=UNZ_ERRNO;
918
919 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.version_needed) != UNZ_OK)
920 err=UNZ_ERRNO;
921
922 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_OK)
923 err=UNZ_ERRNO;
924
925 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.compression_method) != UNZ_OK)
926 err=UNZ_ERRNO;
927
928 if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UNZ_OK)
929 err=UNZ_ERRNO;
930
931 unz64local_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
932
933 if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK)
934 err=UNZ_ERRNO;
935
936 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
937 err=UNZ_ERRNO;
938 file_info.compressed_size = uL;
939
940 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
941 err=UNZ_ERRNO;
942 file_info.uncompressed_size = uL;
943
944 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename) != UNZ_OK)
945 err=UNZ_ERRNO;
946
947 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_extra) != UNZ_OK)
948 err=UNZ_ERRNO;
949
950 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_comment) != UNZ_OK)
951 err=UNZ_ERRNO;
952
953 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK)
954 err=UNZ_ERRNO;
955
956 if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa) != UNZ_OK)
957 err=UNZ_ERRNO;
958
959 if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) != UNZ_OK)
960 err=UNZ_ERRNO;
961
962 // relative offset of local header
963 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
964 err=UNZ_ERRNO;
965 file_info_internal.offset_curfile = uL;
966
967 lSeek+=file_info.size_filename;
968 if ((err==UNZ_OK) && (szFileName!=NULL))
969 {
970 uLong uSizeRead ;
971 if (file_info.size_filename<fileNameBufferSize)
972 {
973 *(szFileName+file_info.size_filename)='\0';
974 uSizeRead = file_info.size_filename;
975 }
976 else
977 uSizeRead = fileNameBufferSize;
978
979 if ((file_info.size_filename>0) && (fileNameBufferSize>0))
980 if (ZREAD64(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeRead)
981 err=UNZ_ERRNO;
982 lSeek -= uSizeRead;
983 }
984
985 // Read extrafield
986 if ((err==UNZ_OK) && (extraField!=NULL))
987 {
988 ZPOS64_T uSizeRead ;
989 if (file_info.size_file_extra<extraFieldBufferSize)
990 uSizeRead = file_info.size_file_extra;
991 else
992 uSizeRead = extraFieldBufferSize;
993
994 if (lSeek!=0)
995 {
996 if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
997 lSeek=0;
998 else
999 err=UNZ_ERRNO;
1000 }
1001
1002 if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
1003 if (ZREAD64(s->z_filefunc, s->filestream,extraField,(uLong)uSizeRead)!=uSizeRead)
1004 err=UNZ_ERRNO;
1005
1006 lSeek += file_info.size_file_extra - (uLong)uSizeRead;
1007 }
1008 else
1009 lSeek += file_info.size_file_extra;
1010
1011
1012 if ((err==UNZ_OK) && (file_info.size_file_extra != 0))
1013 {
1014 uLong acc = 0;
1015
1016 // since lSeek now points to after the extra field we need to move back
1017 lSeek -= file_info.size_file_extra;
1018
1019 if (lSeek!=0)
1020 {
1021 if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
1022 lSeek=0;
1023 else
1024 err=UNZ_ERRNO;
1025 }
1026
1027 while(acc < file_info.size_file_extra)
1028 {
1029 uLong headerId;
1030 uLong dataSize;
1031
1032 if (unz64local_getShort(&s->z_filefunc, s->filestream,&headerId) != UNZ_OK)
1033 err=UNZ_ERRNO;
1034
1035 if (unz64local_getShort(&s->z_filefunc, s->filestream,&dataSize) != UNZ_OK)
1036 err=UNZ_ERRNO;
1037
1038 /* ZIP64 extra fields */
1039 if (headerId == 0x0001)
1040 {
1041 uLong uL;
1042
1043 if(file_info.uncompressed_size == MAXU32)
1044 {
1045 if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK)
1046 err=UNZ_ERRNO;
1047 }
1048
1049 if(file_info.compressed_size == MAXU32)
1050 {
1051 if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK)
1052 err=UNZ_ERRNO;
1053 }
1054
1055 if(file_info_internal.offset_curfile == MAXU32)
1056 {
1057 /* Relative Header offset */
1058 if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK)
1059 err=UNZ_ERRNO;
1060 }
1061
1062 if(file_info.disk_num_start == MAXU32)
1063 {
1064 /* Disk Start Number */
1065 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
1066 err=UNZ_ERRNO;
1067 }
1068
1069 }
1070 else
1071 {
1072 if (ZSEEK64(s->z_filefunc, s->filestream,dataSize,ZLIB_FILEFUNC_SEEK_CUR)!=0)
1073 err=UNZ_ERRNO;
1074 }
1075
1076 acc += 2 + 2 + dataSize;
1077 }
1078 }
1079
1080 if ((err==UNZ_OK) && (szComment!=NULL))
1081 {
1082 uLong uSizeRead ;
1083 if (file_info.size_file_comment<commentBufferSize)
1084 {
1085 *(szComment+file_info.size_file_comment)='\0';
1086 uSizeRead = file_info.size_file_comment;
1087 }
1088 else
1089 uSizeRead = commentBufferSize;
1090
1091 if (lSeek!=0)
1092 {
1093 if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
1094 lSeek=0;
1095 else
1096 err=UNZ_ERRNO;
1097 }
1098
1099 if ((file_info.size_file_comment>0) && (commentBufferSize>0))
1100 if (ZREAD64(s->z_filefunc, s->filestream,szComment,uSizeRead)!=uSizeRead)
1101 err=UNZ_ERRNO;
1102 lSeek+=file_info.size_file_comment - uSizeRead;
1103 }
1104 else
1105 lSeek+=file_info.size_file_comment;
1106
1107
1108 if ((err==UNZ_OK) && (pfile_info!=NULL))
1109 *pfile_info=file_info;
1110
1111 if ((err==UNZ_OK) && (pfile_info_internal!=NULL))
1112 *pfile_info_internal=file_info_internal;
1113
1114 return err;
1115 }
1116
1117
1118
1119 /*
1120 Write info about the ZipFile in the *pglobal_info structure.
1121 No preparation of the structure is needed
1122 return UNZ_OK if there is no problem.
1123 */
unzGetCurrentFileInfo64(unzFile file,unz_file_info64 * pfile_info,char * szFileName,uLong fileNameBufferSize,void * extraField,uLong extraFieldBufferSize,char * szComment,uLong commentBufferSize)1124 extern int ZEXPORT unzGetCurrentFileInfo64 (unzFile file,
1125 unz_file_info64 * pfile_info,
1126 char * szFileName, uLong fileNameBufferSize,
1127 void *extraField, uLong extraFieldBufferSize,
1128 char* szComment, uLong commentBufferSize)
1129 {
1130 return unz64local_GetCurrentFileInfoInternal(file,pfile_info,NULL,
1131 szFileName,fileNameBufferSize,
1132 extraField,extraFieldBufferSize,
1133 szComment,commentBufferSize);
1134 }
1135
unzGetCurrentFileInfo(unzFile file,unz_file_info * pfile_info,char * szFileName,uLong fileNameBufferSize,void * extraField,uLong extraFieldBufferSize,char * szComment,uLong commentBufferSize)1136 extern int ZEXPORT unzGetCurrentFileInfo (unzFile file,
1137 unz_file_info * pfile_info,
1138 char * szFileName, uLong fileNameBufferSize,
1139 void *extraField, uLong extraFieldBufferSize,
1140 char* szComment, uLong commentBufferSize)
1141 {
1142 int err;
1143 unz_file_info64 file_info64;
1144 err = unz64local_GetCurrentFileInfoInternal(file,&file_info64,NULL,
1145 szFileName,fileNameBufferSize,
1146 extraField,extraFieldBufferSize,
1147 szComment,commentBufferSize);
1148 if ((err==UNZ_OK) && (pfile_info != NULL))
1149 {
1150 pfile_info->version = file_info64.version;
1151 pfile_info->version_needed = file_info64.version_needed;
1152 pfile_info->flag = file_info64.flag;
1153 pfile_info->compression_method = file_info64.compression_method;
1154 pfile_info->dosDate = file_info64.dosDate;
1155 pfile_info->crc = file_info64.crc;
1156
1157 pfile_info->size_filename = file_info64.size_filename;
1158 pfile_info->size_file_extra = file_info64.size_file_extra;
1159 pfile_info->size_file_comment = file_info64.size_file_comment;
1160
1161 pfile_info->disk_num_start = file_info64.disk_num_start;
1162 pfile_info->internal_fa = file_info64.internal_fa;
1163 pfile_info->external_fa = file_info64.external_fa;
1164
1165 pfile_info->tmu_date = file_info64.tmu_date,
1166
1167
1168 pfile_info->compressed_size = (uLong)file_info64.compressed_size;
1169 pfile_info->uncompressed_size = (uLong)file_info64.uncompressed_size;
1170
1171 }
1172 return err;
1173 }
1174 /*
1175 Set the current file of the zipfile to the first file.
1176 return UNZ_OK if there is no problem
1177 */
unzGoToFirstFile(unzFile file)1178 extern int ZEXPORT unzGoToFirstFile (unzFile file)
1179 {
1180 int err=UNZ_OK;
1181 unz64_s* s;
1182 if (file==NULL)
1183 return UNZ_PARAMERROR;
1184 s=(unz64_s*)file;
1185 s->pos_in_central_dir=s->offset_central_dir;
1186 s->num_file=0;
1187 err=unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
1188 &s->cur_file_info_internal,
1189 NULL,0,NULL,0,NULL,0);
1190 s->current_file_ok = (err == UNZ_OK);
1191 return err;
1192 }
1193
1194 /*
1195 Set the current file of the zipfile to the next file.
1196 return UNZ_OK if there is no problem
1197 return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
1198 */
unzGoToNextFile(unzFile file)1199 extern int ZEXPORT unzGoToNextFile (unzFile file)
1200 {
1201 unz64_s* s;
1202 int err;
1203
1204 if (file==NULL)
1205 return UNZ_PARAMERROR;
1206 s=(unz64_s*)file;
1207 if (!s->current_file_ok)
1208 return UNZ_END_OF_LIST_OF_FILE;
1209 if (s->gi.number_entry != 0xffff) /* 2^16 files overflow hack */
1210 if (s->num_file+1==s->gi.number_entry)
1211 return UNZ_END_OF_LIST_OF_FILE;
1212
1213 s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
1214 s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;
1215 s->num_file++;
1216 err = unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
1217 &s->cur_file_info_internal,
1218 NULL,0,NULL,0,NULL,0);
1219 s->current_file_ok = (err == UNZ_OK);
1220 return err;
1221 }
1222
1223
1224 /*
1225 Try locate the file szFileName in the zipfile.
1226 For the iCaseSensitivity signification, see unzStringFileNameCompare
1227
1228 return value :
1229 UNZ_OK if the file is found. It becomes the current file.
1230 UNZ_END_OF_LIST_OF_FILE if the file is not found
1231 */
unzLocateFile(unzFile file,const char * szFileName,int iCaseSensitivity)1232 extern int ZEXPORT unzLocateFile (unzFile file, const char *szFileName, int iCaseSensitivity)
1233 {
1234 unz64_s* s;
1235 int err;
1236
1237 /* We remember the 'current' position in the file so that we can jump
1238 * back there if we fail.
1239 */
1240 unz_file_info64 cur_file_infoSaved;
1241 unz_file_info64_internal cur_file_info_internalSaved;
1242 ZPOS64_T num_fileSaved;
1243 ZPOS64_T pos_in_central_dirSaved;
1244
1245
1246 if (file==NULL)
1247 return UNZ_PARAMERROR;
1248
1249 if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP)
1250 return UNZ_PARAMERROR;
1251
1252 s=(unz64_s*)file;
1253 if (!s->current_file_ok)
1254 return UNZ_END_OF_LIST_OF_FILE;
1255
1256 /* Save the current state */
1257 num_fileSaved = s->num_file;
1258 pos_in_central_dirSaved = s->pos_in_central_dir;
1259 cur_file_infoSaved = s->cur_file_info;
1260 cur_file_info_internalSaved = s->cur_file_info_internal;
1261
1262 err = unzGoToFirstFile(file);
1263
1264 while (err == UNZ_OK)
1265 {
1266 char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
1267 err = unzGetCurrentFileInfo64(file,NULL,
1268 szCurrentFileName,sizeof(szCurrentFileName)-1,
1269 NULL,0,NULL,0);
1270 if (err == UNZ_OK)
1271 {
1272 if (unzStringFileNameCompare(szCurrentFileName,
1273 szFileName,iCaseSensitivity)==0)
1274 return UNZ_OK;
1275 err = unzGoToNextFile(file);
1276 }
1277 }
1278
1279 /* We failed, so restore the state of the 'current file' to where we
1280 * were.
1281 */
1282 s->num_file = num_fileSaved ;
1283 s->pos_in_central_dir = pos_in_central_dirSaved ;
1284 s->cur_file_info = cur_file_infoSaved;
1285 s->cur_file_info_internal = cur_file_info_internalSaved;
1286 return err;
1287 }
1288
1289
1290 /*
1291 ///////////////////////////////////////////
1292 // Contributed by Ryan Haksi (mailto://cryogen@infoserve.net)
1293 // I need random access
1294 //
1295 // Further optimization could be realized by adding an ability
1296 // to cache the directory in memory. The goal being a single
1297 // comprehensive file read to put the file I need in a memory.
1298 */
1299
1300 /*
1301 typedef struct unz_file_pos_s
1302 {
1303 ZPOS64_T pos_in_zip_directory; // offset in file
1304 ZPOS64_T num_of_file; // # of file
1305 } unz_file_pos;
1306 */
1307
unzGetFilePos64(unzFile file,unz64_file_pos * file_pos)1308 extern int ZEXPORT unzGetFilePos64(unzFile file, unz64_file_pos* file_pos)
1309 {
1310 unz64_s* s;
1311
1312 if (file==NULL || file_pos==NULL)
1313 return UNZ_PARAMERROR;
1314 s=(unz64_s*)file;
1315 if (!s->current_file_ok)
1316 return UNZ_END_OF_LIST_OF_FILE;
1317
1318 file_pos->pos_in_zip_directory = s->pos_in_central_dir;
1319 file_pos->num_of_file = s->num_file;
1320
1321 return UNZ_OK;
1322 }
1323
unzGetFilePos(unzFile file,unz_file_pos * file_pos)1324 extern int ZEXPORT unzGetFilePos(
1325 unzFile file,
1326 unz_file_pos* file_pos)
1327 {
1328 unz64_file_pos file_pos64;
1329 int err = unzGetFilePos64(file,&file_pos64);
1330 if (err==UNZ_OK)
1331 {
1332 file_pos->pos_in_zip_directory = (uLong)file_pos64.pos_in_zip_directory;
1333 file_pos->num_of_file = (uLong)file_pos64.num_of_file;
1334 }
1335 return err;
1336 }
1337
unzGoToFilePos64(unzFile file,const unz64_file_pos * file_pos)1338 extern int ZEXPORT unzGoToFilePos64(unzFile file, const unz64_file_pos* file_pos)
1339 {
1340 unz64_s* s;
1341 int err;
1342
1343 if (file==NULL || file_pos==NULL)
1344 return UNZ_PARAMERROR;
1345 s=(unz64_s*)file;
1346
1347 /* jump to the right spot */
1348 s->pos_in_central_dir = file_pos->pos_in_zip_directory;
1349 s->num_file = file_pos->num_of_file;
1350
1351 /* set the current file */
1352 err = unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
1353 &s->cur_file_info_internal,
1354 NULL,0,NULL,0,NULL,0);
1355 /* return results */
1356 s->current_file_ok = (err == UNZ_OK);
1357 return err;
1358 }
1359
unzGoToFilePos(unzFile file,unz_file_pos * file_pos)1360 extern int ZEXPORT unzGoToFilePos(
1361 unzFile file,
1362 unz_file_pos* file_pos)
1363 {
1364 unz64_file_pos file_pos64;
1365 if (file_pos == NULL)
1366 return UNZ_PARAMERROR;
1367
1368 file_pos64.pos_in_zip_directory = file_pos->pos_in_zip_directory;
1369 file_pos64.num_of_file = file_pos->num_of_file;
1370 return unzGoToFilePos64(file,&file_pos64);
1371 }
1372
1373 /*
1374 // Unzip Helper Functions - should be here?
1375 ///////////////////////////////////////////
1376 */
1377
1378 /*
1379 Read the local header of the current zipfile
1380 Check the coherency of the local header and info in the end of central
1381 directory about this file
1382 store in *piSizeVar the size of extra info in local header
1383 (filename and size of extra field data)
1384 */
unz64local_CheckCurrentFileCoherencyHeader(unz64_s * s,uInt * piSizeVar,ZPOS64_T * poffset_local_extrafield,uInt * psize_local_extrafield)1385 local int unz64local_CheckCurrentFileCoherencyHeader (unz64_s* s, uInt* piSizeVar,
1386 ZPOS64_T * poffset_local_extrafield,
1387 uInt * psize_local_extrafield)
1388 {
1389 uLong uMagic,uData,uFlags;
1390 uLong size_filename;
1391 uLong size_extra_field;
1392 int err=UNZ_OK;
1393
1394 *piSizeVar = 0;
1395 *poffset_local_extrafield = 0;
1396 *psize_local_extrafield = 0;
1397
1398 if (ZSEEK64(s->z_filefunc, s->filestream,s->cur_file_info_internal.offset_curfile +
1399 s->byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SET)!=0)
1400 return UNZ_ERRNO;
1401
1402
1403 if (err==UNZ_OK)
1404 {
1405 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
1406 err=UNZ_ERRNO;
1407 else if (uMagic!=0x04034b50)
1408 err=UNZ_BADZIPFILE;
1409 }
1410
1411 if (unz64local_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)
1412 err=UNZ_ERRNO;
1413 /*
1414 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
1415 err=UNZ_BADZIPFILE;
1416 */
1417 if (unz64local_getShort(&s->z_filefunc, s->filestream,&uFlags) != UNZ_OK)
1418 err=UNZ_ERRNO;
1419
1420 if (unz64local_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)
1421 err=UNZ_ERRNO;
1422 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method))
1423 err=UNZ_BADZIPFILE;
1424
1425 if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) &&
1426 /* #ifdef HAVE_BZIP2 */
1427 (s->cur_file_info.compression_method!=Z_BZIP2ED) &&
1428 /* #endif */
1429 (s->cur_file_info.compression_method!=Z_DEFLATED))
1430 err=UNZ_BADZIPFILE;
1431
1432 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* date/time */
1433 err=UNZ_ERRNO;
1434
1435 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* crc */
1436 err=UNZ_ERRNO;
1437 else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) && ((uFlags & 8)==0))
1438 err=UNZ_BADZIPFILE;
1439
1440 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size compr */
1441 err=UNZ_ERRNO;
1442 else if (uData != 0xFFFFFFFF && (err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) && ((uFlags & 8)==0))
1443 err=UNZ_BADZIPFILE;
1444
1445 if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size uncompr */
1446 err=UNZ_ERRNO;
1447 else if (uData != 0xFFFFFFFF && (err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) && ((uFlags & 8)==0))
1448 err=UNZ_BADZIPFILE;
1449
1450 if (unz64local_getShort(&s->z_filefunc, s->filestream,&size_filename) != UNZ_OK)
1451 err=UNZ_ERRNO;
1452 else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename))
1453 err=UNZ_BADZIPFILE;
1454
1455 *piSizeVar += (uInt)size_filename;
1456
1457 if (unz64local_getShort(&s->z_filefunc, s->filestream,&size_extra_field) != UNZ_OK)
1458 err=UNZ_ERRNO;
1459 *poffset_local_extrafield= s->cur_file_info_internal.offset_curfile +
1460 SIZEZIPLOCALHEADER + size_filename;
1461 *psize_local_extrafield = (uInt)size_extra_field;
1462
1463 *piSizeVar += (uInt)size_extra_field;
1464
1465 return err;
1466 }
1467
1468 /*
1469 Open for reading data the current file in the zipfile.
1470 If there is no error and the file is opened, the return value is UNZ_OK.
1471 */
unzOpenCurrentFile3(unzFile file,int * method,int * level,int raw,const char * password)1472 extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
1473 int* level, int raw, const char* password)
1474 {
1475 int err=UNZ_OK;
1476 uInt iSizeVar;
1477 unz64_s* s;
1478 file_in_zip64_read_info_s* pfile_in_zip_read_info;
1479 ZPOS64_T offset_local_extrafield; /* offset of the local extra field */
1480 uInt size_local_extrafield; /* size of the local extra field */
1481 # ifndef NOUNCRYPT
1482 char source[12];
1483 # else
1484 if (password != NULL)
1485 return UNZ_PARAMERROR;
1486 # endif
1487
1488 if (file==NULL)
1489 return UNZ_PARAMERROR;
1490 s=(unz64_s*)file;
1491 if (!s->current_file_ok)
1492 return UNZ_PARAMERROR;
1493
1494 if (s->pfile_in_zip_read != NULL)
1495 unzCloseCurrentFile(file);
1496
1497 if (unz64local_CheckCurrentFileCoherencyHeader(s,&iSizeVar, &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK)
1498 return UNZ_BADZIPFILE;
1499
1500 pfile_in_zip_read_info = (file_in_zip64_read_info_s*)ALLOC(sizeof(file_in_zip64_read_info_s));
1501 if (pfile_in_zip_read_info==NULL)
1502 return UNZ_INTERNALERROR;
1503
1504 pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE);
1505 pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;
1506 pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
1507 pfile_in_zip_read_info->pos_local_extrafield=0;
1508 pfile_in_zip_read_info->raw=raw;
1509
1510 if (pfile_in_zip_read_info->read_buffer==NULL)
1511 {
1512 TRYFREE(pfile_in_zip_read_info);
1513 return UNZ_INTERNALERROR;
1514 }
1515
1516 pfile_in_zip_read_info->stream_initialised=0;
1517
1518 if (method!=NULL)
1519 *method = (int)s->cur_file_info.compression_method;
1520
1521 if (level!=NULL)
1522 {
1523 *level = 6;
1524 switch (s->cur_file_info.flag & 0x06)
1525 {
1526 case 6 : *level = 1; break;
1527 case 4 : *level = 2; break;
1528 case 2 : *level = 9; break;
1529 }
1530 }
1531
1532 if ((s->cur_file_info.compression_method!=0) &&
1533 /* #ifdef HAVE_BZIP2 */
1534 (s->cur_file_info.compression_method!=Z_BZIP2ED) &&
1535 /* #endif */
1536 (s->cur_file_info.compression_method!=Z_DEFLATED))
1537
1538 err=UNZ_BADZIPFILE;
1539
1540 pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
1541 pfile_in_zip_read_info->crc32=0;
1542 pfile_in_zip_read_info->total_out_64=0;
1543 pfile_in_zip_read_info->compression_method = s->cur_file_info.compression_method;
1544 pfile_in_zip_read_info->filestream=s->filestream;
1545 pfile_in_zip_read_info->z_filefunc=s->z_filefunc;
1546 pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
1547
1548 pfile_in_zip_read_info->stream.total_out = 0;
1549
1550 if ((s->cur_file_info.compression_method==Z_BZIP2ED) && (!raw))
1551 {
1552 #ifdef HAVE_BZIP2
1553 pfile_in_zip_read_info->bstream.bzalloc = (void *(*) (void *, int, int))0;
1554 pfile_in_zip_read_info->bstream.bzfree = (free_func)0;
1555 pfile_in_zip_read_info->bstream.opaque = (voidpf)0;
1556 pfile_in_zip_read_info->bstream.state = (voidpf)0;
1557
1558 pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
1559 pfile_in_zip_read_info->stream.zfree = (free_func)0;
1560 pfile_in_zip_read_info->stream.opaque = (voidpf)0;
1561 pfile_in_zip_read_info->stream.next_in = (voidpf)0;
1562 pfile_in_zip_read_info->stream.avail_in = 0;
1563
1564 err=BZ2_bzDecompressInit(&pfile_in_zip_read_info->bstream, 0, 0);
1565 if (err == Z_OK)
1566 pfile_in_zip_read_info->stream_initialised=Z_BZIP2ED;
1567 else
1568 {
1569 TRYFREE(pfile_in_zip_read_info);
1570 return err;
1571 }
1572 #else
1573 pfile_in_zip_read_info->raw=1;
1574 #endif
1575 }
1576 else if ((s->cur_file_info.compression_method==Z_DEFLATED) && (!raw))
1577 {
1578 pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
1579 pfile_in_zip_read_info->stream.zfree = (free_func)0;
1580 pfile_in_zip_read_info->stream.opaque = (voidpf)0;
1581 pfile_in_zip_read_info->stream.next_in = 0;
1582 pfile_in_zip_read_info->stream.avail_in = 0;
1583
1584 err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
1585 if (err == Z_OK)
1586 pfile_in_zip_read_info->stream_initialised=Z_DEFLATED;
1587 else
1588 {
1589 TRYFREE(pfile_in_zip_read_info);
1590 return err;
1591 }
1592 /* windowBits is passed < 0 to tell that there is no zlib header.
1593 * Note that in this case inflate *requires* an extra "dummy" byte
1594 * after the compressed stream in order to complete decompression and
1595 * return Z_STREAM_END.
1596 * In unzip, i don't wait absolutely Z_STREAM_END because I known the
1597 * size of both compressed and uncompressed data
1598 */
1599 }
1600 pfile_in_zip_read_info->rest_read_compressed =
1601 s->cur_file_info.compressed_size ;
1602 pfile_in_zip_read_info->rest_read_uncompressed =
1603 s->cur_file_info.uncompressed_size ;
1604
1605
1606 pfile_in_zip_read_info->pos_in_zipfile =
1607 s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER +
1608 iSizeVar;
1609
1610 pfile_in_zip_read_info->stream.avail_in = (uInt)0;
1611
1612 s->pfile_in_zip_read = pfile_in_zip_read_info;
1613 s->encrypted = 0;
1614
1615 # ifndef NOUNCRYPT
1616 if (password != NULL)
1617 {
1618 int i;
1619 s->pcrc_32_tab = get_crc_table();
1620 init_keys(password,s->keys,s->pcrc_32_tab);
1621 if (ZSEEK64(s->z_filefunc, s->filestream,
1622 s->pfile_in_zip_read->pos_in_zipfile +
1623 s->pfile_in_zip_read->byte_before_the_zipfile,
1624 SEEK_SET)!=0)
1625 return UNZ_INTERNALERROR;
1626 if(ZREAD64(s->z_filefunc, s->filestream,source, 12)<12)
1627 return UNZ_INTERNALERROR;
1628
1629 for (i = 0; i<12; i++)
1630 zdecode(s->keys,s->pcrc_32_tab,source[i]);
1631
1632 s->pfile_in_zip_read->pos_in_zipfile+=12;
1633 s->encrypted=1;
1634 }
1635 # endif
1636
1637
1638 return UNZ_OK;
1639 }
1640
unzOpenCurrentFile(unzFile file)1641 extern int ZEXPORT unzOpenCurrentFile (unzFile file)
1642 {
1643 return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL);
1644 }
1645
unzOpenCurrentFilePassword(unzFile file,const char * password)1646 extern int ZEXPORT unzOpenCurrentFilePassword (unzFile file, const char* password)
1647 {
1648 return unzOpenCurrentFile3(file, NULL, NULL, 0, password);
1649 }
1650
unzOpenCurrentFile2(unzFile file,int * method,int * level,int raw)1651 extern int ZEXPORT unzOpenCurrentFile2 (unzFile file, int* method, int* level, int raw)
1652 {
1653 return unzOpenCurrentFile3(file, method, level, raw, NULL);
1654 }
1655
1656 /** Addition for GDAL : START */
1657
unzGetCurrentFileZStreamPos64(unzFile file)1658 extern ZPOS64_T ZEXPORT unzGetCurrentFileZStreamPos64( unzFile file)
1659 {
1660 unz64_s* s;
1661 file_in_zip64_read_info_s* pfile_in_zip_read_info;
1662 s=(unz64_s*)file;
1663 if (file==NULL)
1664 return 0; //UNZ_PARAMERROR;
1665 pfile_in_zip_read_info=s->pfile_in_zip_read;
1666 if (pfile_in_zip_read_info==NULL)
1667 return 0; //UNZ_PARAMERROR;
1668 return pfile_in_zip_read_info->pos_in_zipfile +
1669 pfile_in_zip_read_info->byte_before_the_zipfile;
1670 }
1671
1672 /** Addition for GDAL : END */
1673
1674 /*
1675 Read bytes from the current file.
1676 buf contain buffer where data must be copied
1677 len the size of buf.
1678
1679 return the number of byte copied if somes bytes are copied
1680 return 0 if the end of file was reached
1681 return <0 with error code if there is an error
1682 (UNZ_ERRNO for IO error, or zLib error for uncompress error)
1683 */
unzReadCurrentFile(unzFile file,voidp buf,unsigned len)1684 extern int ZEXPORT unzReadCurrentFile (unzFile file, voidp buf, unsigned len)
1685 {
1686 int err=UNZ_OK;
1687 uInt iRead = 0;
1688 unz64_s* s;
1689 file_in_zip64_read_info_s* pfile_in_zip_read_info;
1690 if (file==NULL)
1691 return UNZ_PARAMERROR;
1692 s=(unz64_s*)file;
1693 pfile_in_zip_read_info=s->pfile_in_zip_read;
1694
1695 if (pfile_in_zip_read_info==NULL)
1696 return UNZ_PARAMERROR;
1697
1698
1699 if (pfile_in_zip_read_info->read_buffer == NULL)
1700 return UNZ_END_OF_LIST_OF_FILE;
1701 if (len==0)
1702 return 0;
1703
1704 pfile_in_zip_read_info->stream.next_out = (Bytef*)buf;
1705
1706 pfile_in_zip_read_info->stream.avail_out = (uInt)len;
1707
1708 if ((len>pfile_in_zip_read_info->rest_read_uncompressed) &&
1709 (!(pfile_in_zip_read_info->raw)))
1710 pfile_in_zip_read_info->stream.avail_out =
1711 (uInt)pfile_in_zip_read_info->rest_read_uncompressed;
1712
1713 if ((len>pfile_in_zip_read_info->rest_read_compressed+
1714 pfile_in_zip_read_info->stream.avail_in) &&
1715 (pfile_in_zip_read_info->raw))
1716 pfile_in_zip_read_info->stream.avail_out =
1717 (uInt)pfile_in_zip_read_info->rest_read_compressed+
1718 pfile_in_zip_read_info->stream.avail_in;
1719
1720 while (pfile_in_zip_read_info->stream.avail_out>0)
1721 {
1722 if ((pfile_in_zip_read_info->stream.avail_in==0) &&
1723 (pfile_in_zip_read_info->rest_read_compressed>0))
1724 {
1725 uInt uReadThis = UNZ_BUFSIZE;
1726 if (pfile_in_zip_read_info->rest_read_compressed<uReadThis)
1727 uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
1728 if (uReadThis == 0)
1729 return UNZ_EOF;
1730 if (ZSEEK64(pfile_in_zip_read_info->z_filefunc,
1731 pfile_in_zip_read_info->filestream,
1732 pfile_in_zip_read_info->pos_in_zipfile +
1733 pfile_in_zip_read_info->byte_before_the_zipfile,
1734 ZLIB_FILEFUNC_SEEK_SET)!=0)
1735 return UNZ_ERRNO;
1736 if (ZREAD64(pfile_in_zip_read_info->z_filefunc,
1737 pfile_in_zip_read_info->filestream,
1738 pfile_in_zip_read_info->read_buffer,
1739 uReadThis)!=uReadThis)
1740 return UNZ_ERRNO;
1741
1742
1743 # ifndef NOUNCRYPT
1744 if(s->encrypted)
1745 {
1746 uInt i;
1747 for(i=0;i<uReadThis;i++)
1748 pfile_in_zip_read_info->read_buffer[i] =
1749 zdecode(s->keys,s->pcrc_32_tab,
1750 pfile_in_zip_read_info->read_buffer[i]);
1751 }
1752 # endif
1753
1754
1755 pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
1756
1757 pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
1758
1759 pfile_in_zip_read_info->stream.next_in =
1760 (Bytef*)pfile_in_zip_read_info->read_buffer;
1761 pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
1762 }
1763
1764 if ((pfile_in_zip_read_info->compression_method==0) || (pfile_in_zip_read_info->raw))
1765 {
1766 uInt uDoCopy,i ;
1767
1768 if ((pfile_in_zip_read_info->stream.avail_in == 0) &&
1769 (pfile_in_zip_read_info->rest_read_compressed == 0))
1770 return (iRead==0) ? UNZ_EOF : iRead;
1771
1772 if (pfile_in_zip_read_info->stream.avail_out <
1773 pfile_in_zip_read_info->stream.avail_in)
1774 uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
1775 else
1776 uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
1777
1778 for (i=0;i<uDoCopy;i++)
1779 *(pfile_in_zip_read_info->stream.next_out+i) =
1780 *(pfile_in_zip_read_info->stream.next_in+i);
1781
1782 pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uDoCopy;
1783
1784 pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,
1785 pfile_in_zip_read_info->stream.next_out,
1786 uDoCopy);
1787 pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
1788 pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
1789 pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
1790 pfile_in_zip_read_info->stream.next_out += uDoCopy;
1791 pfile_in_zip_read_info->stream.next_in += uDoCopy;
1792 pfile_in_zip_read_info->stream.total_out += uDoCopy;
1793 iRead += uDoCopy;
1794 }
1795 else if (pfile_in_zip_read_info->compression_method==Z_BZIP2ED)
1796 {
1797 #ifdef HAVE_BZIP2
1798 uLong uTotalOutBefore,uTotalOutAfter;
1799 const Bytef *bufBefore;
1800 uLong uOutThis;
1801
1802 pfile_in_zip_read_info->bstream.next_in = (char*)pfile_in_zip_read_info->stream.next_in;
1803 pfile_in_zip_read_info->bstream.avail_in = pfile_in_zip_read_info->stream.avail_in;
1804 pfile_in_zip_read_info->bstream.total_in_lo32 = pfile_in_zip_read_info->stream.total_in;
1805 pfile_in_zip_read_info->bstream.total_in_hi32 = 0;
1806 pfile_in_zip_read_info->bstream.next_out = (char*)pfile_in_zip_read_info->stream.next_out;
1807 pfile_in_zip_read_info->bstream.avail_out = pfile_in_zip_read_info->stream.avail_out;
1808 pfile_in_zip_read_info->bstream.total_out_lo32 = pfile_in_zip_read_info->stream.total_out;
1809 pfile_in_zip_read_info->bstream.total_out_hi32 = 0;
1810
1811 uTotalOutBefore = pfile_in_zip_read_info->bstream.total_out_lo32;
1812 bufBefore = (const Bytef *)pfile_in_zip_read_info->bstream.next_out;
1813
1814 err=BZ2_bzDecompress(&pfile_in_zip_read_info->bstream);
1815
1816 uTotalOutAfter = pfile_in_zip_read_info->bstream.total_out_lo32;
1817 uOutThis = uTotalOutAfter-uTotalOutBefore;
1818
1819 pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
1820
1821 pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,bufBefore, (uInt)(uOutThis));
1822 pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis;
1823 iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
1824
1825 pfile_in_zip_read_info->stream.next_in = (Bytef*)pfile_in_zip_read_info->bstream.next_in;
1826 pfile_in_zip_read_info->stream.avail_in = pfile_in_zip_read_info->bstream.avail_in;
1827 pfile_in_zip_read_info->stream.total_in = pfile_in_zip_read_info->bstream.total_in_lo32;
1828 pfile_in_zip_read_info->stream.next_out = (Bytef*)pfile_in_zip_read_info->bstream.next_out;
1829 pfile_in_zip_read_info->stream.avail_out = pfile_in_zip_read_info->bstream.avail_out;
1830 pfile_in_zip_read_info->stream.total_out = pfile_in_zip_read_info->bstream.total_out_lo32;
1831
1832 if (err==BZ_STREAM_END)
1833 return (iRead==0) ? UNZ_EOF : iRead;
1834 if (err!=BZ_OK)
1835 break;
1836 #endif
1837 } // end Z_BZIP2ED
1838 else
1839 {
1840 ZPOS64_T uTotalOutBefore,uTotalOutAfter;
1841 const Bytef *bufBefore;
1842 ZPOS64_T uOutThis;
1843 int flush=Z_SYNC_FLUSH;
1844
1845 uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
1846 bufBefore = pfile_in_zip_read_info->stream.next_out;
1847
1848 /*
1849 if ((pfile_in_zip_read_info->rest_read_uncompressed ==
1850 pfile_in_zip_read_info->stream.avail_out) &&
1851 (pfile_in_zip_read_info->rest_read_compressed == 0))
1852 flush = Z_FINISH;
1853 */
1854 err=inflate(&pfile_in_zip_read_info->stream,flush);
1855
1856 if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL))
1857 err = Z_DATA_ERROR;
1858
1859 uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
1860 uOutThis = uTotalOutAfter-uTotalOutBefore;
1861
1862 pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
1863
1864 pfile_in_zip_read_info->crc32 =
1865 crc32(pfile_in_zip_read_info->crc32,bufBefore,
1866 (uInt)(uOutThis));
1867
1868 pfile_in_zip_read_info->rest_read_uncompressed -=
1869 uOutThis;
1870
1871 iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
1872
1873 if (err==Z_STREAM_END)
1874 return (iRead==0) ? UNZ_EOF : iRead;
1875 if (err!=Z_OK)
1876 break;
1877 }
1878 }
1879
1880 if (err==Z_OK)
1881 return iRead;
1882 return err;
1883 }
1884
1885
1886 /*
1887 Give the current position in uncompressed data
1888 */
unztell(unzFile file)1889 extern z_off_t ZEXPORT unztell (unzFile file)
1890 {
1891 unz64_s* s;
1892 file_in_zip64_read_info_s* pfile_in_zip_read_info;
1893 if (file==NULL)
1894 return UNZ_PARAMERROR;
1895 s=(unz64_s*)file;
1896 pfile_in_zip_read_info=s->pfile_in_zip_read;
1897
1898 if (pfile_in_zip_read_info==NULL)
1899 return UNZ_PARAMERROR;
1900
1901 return (z_off_t)pfile_in_zip_read_info->stream.total_out;
1902 }
1903
unztell64(unzFile file)1904 extern ZPOS64_T ZEXPORT unztell64 (unzFile file)
1905 {
1906
1907 unz64_s* s;
1908 file_in_zip64_read_info_s* pfile_in_zip_read_info;
1909 if (file==NULL)
1910 return (ZPOS64_T)-1;
1911 s=(unz64_s*)file;
1912 pfile_in_zip_read_info=s->pfile_in_zip_read;
1913
1914 if (pfile_in_zip_read_info==NULL)
1915 return (ZPOS64_T)-1;
1916
1917 return pfile_in_zip_read_info->total_out_64;
1918 }
1919
1920
1921 /*
1922 return 1 if the end of file was reached, 0 elsewhere
1923 */
unzeof(unzFile file)1924 extern int ZEXPORT unzeof (unzFile file)
1925 {
1926 unz64_s* s;
1927 file_in_zip64_read_info_s* pfile_in_zip_read_info;
1928 if (file==NULL)
1929 return UNZ_PARAMERROR;
1930 s=(unz64_s*)file;
1931 pfile_in_zip_read_info=s->pfile_in_zip_read;
1932
1933 if (pfile_in_zip_read_info==NULL)
1934 return UNZ_PARAMERROR;
1935
1936 if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
1937 return 1;
1938 else
1939 return 0;
1940 }
1941
1942
1943
1944 /*
1945 Read extra field from the current file (opened by unzOpenCurrentFile)
1946 This is the local-header version of the extra field (sometimes, there is
1947 more info in the local-header version than in the central-header)
1948
1949 if buf==NULL, it return the size of the local extra field that can be read
1950
1951 if buf!=NULL, len is the size of the buffer, the extra header is copied in
1952 buf.
1953 the return value is the number of bytes copied in buf, or (if <0)
1954 the error code
1955 */
unzGetLocalExtrafield(unzFile file,voidp buf,unsigned len)1956 extern int ZEXPORT unzGetLocalExtrafield (unzFile file, voidp buf, unsigned len)
1957 {
1958 unz64_s* s;
1959 file_in_zip64_read_info_s* pfile_in_zip_read_info;
1960 uInt read_now;
1961 ZPOS64_T size_to_read;
1962
1963 if (file==NULL)
1964 return UNZ_PARAMERROR;
1965 s=(unz64_s*)file;
1966 pfile_in_zip_read_info=s->pfile_in_zip_read;
1967
1968 if (pfile_in_zip_read_info==NULL)
1969 return UNZ_PARAMERROR;
1970
1971 size_to_read = (pfile_in_zip_read_info->size_local_extrafield -
1972 pfile_in_zip_read_info->pos_local_extrafield);
1973
1974 if (buf==NULL)
1975 return (int)size_to_read;
1976
1977 if (len>size_to_read)
1978 read_now = (uInt)size_to_read;
1979 else
1980 read_now = (uInt)len ;
1981
1982 if (read_now==0)
1983 return 0;
1984
1985 if (ZSEEK64(pfile_in_zip_read_info->z_filefunc,
1986 pfile_in_zip_read_info->filestream,
1987 pfile_in_zip_read_info->offset_local_extrafield +
1988 pfile_in_zip_read_info->pos_local_extrafield,
1989 ZLIB_FILEFUNC_SEEK_SET)!=0)
1990 return UNZ_ERRNO;
1991
1992 if (ZREAD64(pfile_in_zip_read_info->z_filefunc,
1993 pfile_in_zip_read_info->filestream,
1994 buf,read_now)!=read_now)
1995 return UNZ_ERRNO;
1996
1997 return (int)read_now;
1998 }
1999
2000 /*
2001 Close the file in zip opened with unzOpenCurrentFile
2002 Return UNZ_CRCERROR if all the file was read but the CRC is not good
2003 */
unzCloseCurrentFile(unzFile file)2004 extern int ZEXPORT unzCloseCurrentFile (unzFile file)
2005 {
2006 int err=UNZ_OK;
2007
2008 unz64_s* s;
2009 file_in_zip64_read_info_s* pfile_in_zip_read_info;
2010 if (file==NULL)
2011 return UNZ_PARAMERROR;
2012 s=(unz64_s*)file;
2013 pfile_in_zip_read_info=s->pfile_in_zip_read;
2014
2015 if (pfile_in_zip_read_info==NULL)
2016 return UNZ_PARAMERROR;
2017
2018
2019 if ((pfile_in_zip_read_info->rest_read_uncompressed == 0) &&
2020 (!pfile_in_zip_read_info->raw))
2021 {
2022 if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait)
2023 err=UNZ_CRCERROR;
2024 }
2025
2026
2027 TRYFREE(pfile_in_zip_read_info->read_buffer);
2028 pfile_in_zip_read_info->read_buffer = NULL;
2029 if (pfile_in_zip_read_info->stream_initialised == Z_DEFLATED)
2030 inflateEnd(&pfile_in_zip_read_info->stream);
2031 #ifdef HAVE_BZIP2
2032 else if (pfile_in_zip_read_info->stream_initialised == Z_BZIP2ED)
2033 BZ2_bzDecompressEnd(&pfile_in_zip_read_info->bstream);
2034 #endif
2035
2036
2037 pfile_in_zip_read_info->stream_initialised = 0;
2038 TRYFREE(pfile_in_zip_read_info);
2039
2040 s->pfile_in_zip_read=NULL;
2041
2042 return err;
2043 }
2044
2045
2046 /*
2047 Get the global comment string of the ZipFile, in the szComment buffer.
2048 uSizeBuf is the size of the szComment buffer.
2049 return the number of byte copied or an error code <0
2050 */
unzGetGlobalComment(unzFile file,char * szComment,uLong uSizeBuf)2051 extern int ZEXPORT unzGetGlobalComment (unzFile file, char * szComment, uLong uSizeBuf)
2052 {
2053 unz64_s* s;
2054 uLong uReadThis ;
2055 if (file==NULL)
2056 return (int)UNZ_PARAMERROR;
2057 s=(unz64_s*)file;
2058
2059 uReadThis = uSizeBuf;
2060 if (uReadThis>s->gi.size_comment)
2061 uReadThis = s->gi.size_comment;
2062
2063 if (ZSEEK64(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_SET)!=0)
2064 return UNZ_ERRNO;
2065
2066 if (uReadThis>0)
2067 {
2068 *szComment='\0';
2069 if (ZREAD64(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis)
2070 return UNZ_ERRNO;
2071 }
2072
2073 if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
2074 *(szComment+s->gi.size_comment)='\0';
2075 return (int)uReadThis;
2076 }
2077
2078 /* Additions by RX '2004 */
unzGetOffset64(unzFile file)2079 extern ZPOS64_T ZEXPORT unzGetOffset64(unzFile file)
2080 {
2081 unz64_s* s;
2082
2083 if (file==NULL)
2084 return 0; //UNZ_PARAMERROR;
2085 s=(unz64_s*)file;
2086 if (!s->current_file_ok)
2087 return 0;
2088 if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff)
2089 if (s->num_file==s->gi.number_entry)
2090 return 0;
2091 return s->pos_in_central_dir;
2092 }
2093
unzGetOffset(unzFile file)2094 extern uLong ZEXPORT unzGetOffset (unzFile file)
2095 {
2096 ZPOS64_T offset64;
2097
2098 if (file==NULL)
2099 return 0; //UNZ_PARAMERROR;
2100 offset64 = unzGetOffset64(file);
2101 return (uLong)offset64;
2102 }
2103
unzSetOffset64(unzFile file,ZPOS64_T pos)2104 extern int ZEXPORT unzSetOffset64(unzFile file, ZPOS64_T pos)
2105 {
2106 unz64_s* s;
2107 int err;
2108
2109 if (file==NULL)
2110 return UNZ_PARAMERROR;
2111 s=(unz64_s*)file;
2112
2113 s->pos_in_central_dir = pos;
2114 s->num_file = s->gi.number_entry; /* hack */
2115 err = unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
2116 &s->cur_file_info_internal,
2117 NULL,0,NULL,0,NULL,0);
2118 s->current_file_ok = (err == UNZ_OK);
2119 return err;
2120 }
2121
unzSetOffset(unzFile file,uLong pos)2122 extern int ZEXPORT unzSetOffset (unzFile file, uLong pos)
2123 {
2124 return unzSetOffset64(file,pos);
2125 }
2126