-
Notifications
You must be signed in to change notification settings - Fork 2.4k
/
unzip.c
1981 lines (1605 loc) · 66.1 KB
/
unzip.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* unzip.c -- IO for uncompress .zip files using zlib
Version 1.1, February 14h, 2010
part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
Modifications of Unzip for Zip64
Copyright (C) 2007-2008 Even Rouault
Modifications for Zip64 support on both zip and unzip
Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
For more info read MiniZip_info.txt
------------------------------------------------------------------------------------
Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of
compatibility with older software. The following is from the original crypt.c.
Code woven in by Terry Thorsen 1/2003.
Copyright (c) 1990-2000 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2000-Apr-09 or later
(the contents of which are also included in zip.h) for terms of use.
If, for some reason, all these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h]
The encryption/decryption parts of this source code (as opposed to the
non-echoing password parts) were originally written in Europe. The
whole source package can be freely distributed, including from the USA.
(Prior to January 2000, re-export from the US was a violation of US law.)
This encryption code is a direct transcription of the algorithm from
Roger Schlafly, described by Phil Katz in the file appnote.txt. This
file (appnote.txt) is distributed with the PKZIP program (even in the
version without encryption capabilities).
------------------------------------------------------------------------------------
Changes in unzip.c
2007-2008 - Even Rouault - Addition of cpl_unzGetCurrentFileZStreamPos
2007-2008 - Even Rouault - Decoration of symbol names unz* -> cpl_unz*
2007-2008 - Even Rouault - Remove old C style function prototypes
2007-2008 - Even Rouault - Add unzip support for ZIP64
Copyright (C) 2007-2008 Even Rouault
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).
Oct-2009 - Mathias Svensson - Fixed problem if uncompressed size was > 4G and compressed size was <4G
should only read the compressed/uncompressed size from the Zip64 format if
the size from normal header was 0xFFFFFFFF
Oct-2009 - Mathias Svensson - Applied some bug fixes from patches received from Gilles Vollant
Oct-2009 - Mathias Svensson - Applied support to unzip files with compression method BZIP2 (bzip2 lib is required)
Patch created by Daniel Borca
Jan-2010 - back to unzip and minizip 1.0 name scheme, with compatibility layer
Copyright (C) 1998 - 2010 Gilles Vollant, Even Rouault, Mathias Svensson
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "zlib.h"
#include "unzip.h"
#ifdef STDC
# include <stddef.h>
#endif
#ifdef NO_ERRNO_H
extern int errno;
#else
# include <errno.h>
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
#ifndef CASESENSITIVITYDEFAULT_NO
# if (!defined(__unix__) && !defined(__unix) || defined(__CYGWIN__)) && !defined(CASESENSITIVITYDEFAULT_YES)
# define CASESENSITIVITYDEFAULT_NO
# endif
#endif
#ifndef UNZ_BUFSIZE
#define UNZ_BUFSIZE (16384)
#endif
#ifndef UNZ_MAXFILENAMEINZIP
#define UNZ_MAXFILENAMEINZIP (256)
#endif
#ifndef ALLOC
# define ALLOC(size) (malloc(size))
#endif
#define SIZECENTRALDIRITEM (0x2e)
#define SIZEZIPLOCALHEADER (0x1e)
const char unz_copyright[] =
" unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
/* unz_file_info64_internal contain internal info about a file in zipfile*/
typedef struct unz_file_info64_internal_s
{
ZPOS64_T offset_curfile;/* relative offset of local header 8 bytes */
} unz_file_info64_internal;
/* file_in_zip_read_info_s contain internal information about a file in zipfile,
when reading and decompress it */
typedef struct
{
char *read_buffer; /* internal buffer for compressed data */
z_stream stream; /* zLib stream structure for inflate */
#ifdef HAVE_BZIP2
bz_stream bstream; /* bzLib stream structure for bziped */
#endif
ZPOS64_T pos_in_zipfile; /* position in byte on the zipfile, for fseek*/
uLong stream_initialised; /* flag set if stream structure is initialised*/
ZPOS64_T offset_local_extrafield;/* offset of the local extra field */
uInt size_local_extrafield;/* size of the local extra field */
ZPOS64_T pos_local_extrafield; /* position in the local extra field in read*/
ZPOS64_T total_out_64;
uLong crc32; /* crc32 of all data uncompressed */
uLong crc32_wait; /* crc32 we must obtain after decompress all */
ZPOS64_T rest_read_compressed; /* number of byte to be decompressed */
ZPOS64_T rest_read_uncompressed;/*number of byte to be obtained after decomp*/
zlib_filefunc64_32_def z_filefunc;
voidpf filestream; /* io structure of the zipfile */
uLong compression_method; /* compression method (0==store) */
ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
int raw;
} file_in_zip64_read_info_s;
/* unz64_s contain internal information about the zipfile
*/
typedef struct
{
zlib_filefunc64_32_def z_filefunc;
int is64bitOpenFunction;
voidpf filestream; /* io structure of the zipfile */
unz_global_info64 gi; /* public global information */
ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
ZPOS64_T num_file; /* number of the current file in the zipfile*/
ZPOS64_T pos_in_central_dir; /* pos of the current file in the central dir*/
ZPOS64_T current_file_ok; /* flag about the usability of the current file*/
ZPOS64_T central_pos; /* position of the beginning of the central dir*/
ZPOS64_T size_central_dir; /* size of the central directory */
ZPOS64_T offset_central_dir; /* offset of start of central directory with
respect to the starting disk number */
unz_file_info64 cur_file_info; /* public info about the current file in zip*/
unz_file_info64_internal cur_file_info_internal; /* private info about it*/
file_in_zip64_read_info_s* pfile_in_zip_read; /* structure about the current
file if we are decompressing it */
int encrypted;
int isZip64;
# ifndef NOUNCRYPT
unsigned long keys[3]; /* keys defining the pseudo-random sequence */
const z_crc_t* pcrc_32_tab;
# endif
} unz64_s;
#ifndef NOUNCRYPT
#include "crypt.h"
#endif
/* ===========================================================================
Reads a long in LSB order from the given gz_stream. Sets
*/
local int unz64local_getShort(const zlib_filefunc64_32_def* pzlib_filefunc_def,
voidpf filestream,
uLong *pX) {
unsigned char c[2];
int err = (int)ZREAD64(*pzlib_filefunc_def,filestream,c,2);
if (err==2)
{
*pX = c[0] | ((uLong)c[1] << 8);
return UNZ_OK;
}
else
{
*pX = 0;
if (ZERROR64(*pzlib_filefunc_def,filestream))
return UNZ_ERRNO;
else
return UNZ_EOF;
}
}
local int unz64local_getLong(const zlib_filefunc64_32_def* pzlib_filefunc_def,
voidpf filestream,
uLong *pX) {
unsigned char c[4];
int err = (int)ZREAD64(*pzlib_filefunc_def,filestream,c,4);
if (err==4)
{
*pX = c[0] | ((uLong)c[1] << 8) | ((uLong)c[2] << 16) | ((uLong)c[3] << 24);
return UNZ_OK;
}
else
{
*pX = 0;
if (ZERROR64(*pzlib_filefunc_def,filestream))
return UNZ_ERRNO;
else
return UNZ_EOF;
}
}
local int unz64local_getLong64(const zlib_filefunc64_32_def* pzlib_filefunc_def,
voidpf filestream,
ZPOS64_T *pX) {
unsigned char c[8];
int err = (int)ZREAD64(*pzlib_filefunc_def,filestream,c,8);
if (err==8)
{
*pX = c[0] | ((ZPOS64_T)c[1] << 8) | ((ZPOS64_T)c[2] << 16) | ((ZPOS64_T)c[3] << 24)
| ((ZPOS64_T)c[4] << 32) | ((ZPOS64_T)c[5] << 40) | ((ZPOS64_T)c[6] << 48) | ((ZPOS64_T)c[7] << 56);
return UNZ_OK;
}
else
{
*pX = 0;
if (ZERROR64(*pzlib_filefunc_def,filestream))
return UNZ_ERRNO;
else
return UNZ_EOF;
}
}
/* My own strcmpi / strcasecmp */
local int strcmpcasenosensitive_internal(const char* fileName1, const char* fileName2) {
for (;;)
{
char c1=*(fileName1++);
char c2=*(fileName2++);
if ((c1>='a') && (c1<='z'))
c1 -= 0x20;
if ((c2>='a') && (c2<='z'))
c2 -= 0x20;
if (c1=='\0')
return ((c2=='\0') ? 0 : -1);
if (c2=='\0')
return 1;
if (c1<c2)
return -1;
if (c1>c2)
return 1;
}
}
#ifdef CASESENSITIVITYDEFAULT_NO
#define CASESENSITIVITYDEFAULTVALUE 2
#else
#define CASESENSITIVITYDEFAULTVALUE 1
#endif
#ifndef STRCMPCASENOSENTIVEFUNCTION
#define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
#endif
/*
Compare two filenames (fileName1,fileName2).
If iCaseSensitivity = 1, comparison is case sensitive (like strcmp)
If iCaseSensitivity = 2, comparison is not case sensitive (like strcmpi
or strcasecmp)
If iCaseSensitivity = 0, case sensitivity is default of your operating system
(like 1 on Unix, 2 on Windows)
*/
extern int ZEXPORT unzStringFileNameCompare (const char* fileName1,
const char* fileName2,
int iCaseSensitivity) {
if (iCaseSensitivity==0)
iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
if (iCaseSensitivity==1)
return strcmp(fileName1,fileName2);
return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
}
#ifndef BUFREADCOMMENT
#define BUFREADCOMMENT (0x400)
#endif
#ifndef CENTRALDIRINVALID
#define CENTRALDIRINVALID ((ZPOS64_T)(-1))
#endif
/*
Locate the Central directory of a zipfile (at the end, just before
the global comment)
*/
local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream) {
unsigned char* buf;
ZPOS64_T uSizeFile;
ZPOS64_T uBackRead;
ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
ZPOS64_T uPosFound=CENTRALDIRINVALID;
if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
return CENTRALDIRINVALID;
uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
if (uMaxBack>uSizeFile)
uMaxBack = uSizeFile;
buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
if (buf==NULL)
return CENTRALDIRINVALID;
uBackRead = 4;
while (uBackRead<uMaxBack)
{
uLong uReadSize;
ZPOS64_T uReadPos ;
int i;
if (uBackRead+BUFREADCOMMENT>uMaxBack)
uBackRead = uMaxBack;
else
uBackRead+=BUFREADCOMMENT;
uReadPos = uSizeFile-uBackRead ;
uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
(BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
break;
if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
break;
for (i=(int)uReadSize-3; (i--)>0;)
if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
{
uPosFound = uReadPos+(unsigned)i;
break;
}
if (uPosFound!=CENTRALDIRINVALID)
break;
}
free(buf);
return uPosFound;
}
/*
Locate the Central directory 64 of a zipfile (at the end, just before
the global comment)
*/
local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib_filefunc_def,
voidpf filestream) {
unsigned char* buf;
ZPOS64_T uSizeFile;
ZPOS64_T uBackRead;
ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
ZPOS64_T uPosFound=CENTRALDIRINVALID;
uLong uL;
ZPOS64_T relativeOffset;
if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
return CENTRALDIRINVALID;
uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
if (uMaxBack>uSizeFile)
uMaxBack = uSizeFile;
buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
if (buf==NULL)
return CENTRALDIRINVALID;
uBackRead = 4;
while (uBackRead<uMaxBack)
{
uLong uReadSize;
ZPOS64_T uReadPos;
int i;
if (uBackRead+BUFREADCOMMENT>uMaxBack)
uBackRead = uMaxBack;
else
uBackRead+=BUFREADCOMMENT;
uReadPos = uSizeFile-uBackRead ;
uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
(BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
break;
if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
break;
for (i=(int)uReadSize-3; (i--)>0;)
if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
{
uPosFound = uReadPos+(unsigned)i;
break;
}
if (uPosFound!=CENTRALDIRINVALID)
break;
}
free(buf);
if (uPosFound == CENTRALDIRINVALID)
return CENTRALDIRINVALID;
/* Zip64 end of central directory locator */
if (ZSEEK64(*pzlib_filefunc_def,filestream, uPosFound,ZLIB_FILEFUNC_SEEK_SET)!=0)
return CENTRALDIRINVALID;
/* the signature, already checked */
if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
return CENTRALDIRINVALID;
/* number of the disk with the start of the zip64 end of central directory */
if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
return CENTRALDIRINVALID;
if (uL != 0)
return CENTRALDIRINVALID;
/* relative offset of the zip64 end of central directory record */
if (unz64local_getLong64(pzlib_filefunc_def,filestream,&relativeOffset)!=UNZ_OK)
return CENTRALDIRINVALID;
/* total number of disks */
if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
return CENTRALDIRINVALID;
if (uL != 1)
return CENTRALDIRINVALID;
/* Goto end of central directory record */
if (ZSEEK64(*pzlib_filefunc_def,filestream, relativeOffset,ZLIB_FILEFUNC_SEEK_SET)!=0)
return CENTRALDIRINVALID;
/* the signature */
if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
return CENTRALDIRINVALID;
if (uL != 0x06064b50)
return CENTRALDIRINVALID;
return relativeOffset;
}
/*
Open a Zip file. path contain the full pathname (by example,
on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer
"zlib/zlib114.zip".
If the zipfile cannot be opened (file doesn't exist or in not valid), the
return value is NULL.
Else, the return value is a unzFile Handle, usable with other function
of this unzip package.
*/
local unzFile unzOpenInternal(const void *path,
zlib_filefunc64_32_def* pzlib_filefunc64_32_def,
int is64bitOpenFunction) {
unz64_s us;
unz64_s *s;
ZPOS64_T central_pos;
uLong uL;
uLong number_disk; /* number of the current disk, used for
spanning ZIP, unsupported, always 0*/
uLong number_disk_with_CD; /* number the disk with central dir, used
for spanning ZIP, unsupported, always 0*/
ZPOS64_T number_entry_CD; /* total number of entries in
the central dir
(same than number_entry on nospan) */
int err=UNZ_OK;
if (unz_copyright[0]!=' ')
return NULL;
us.z_filefunc.zseek32_file = NULL;
us.z_filefunc.ztell32_file = NULL;
if (pzlib_filefunc64_32_def==NULL)
fill_fopen64_filefunc(&us.z_filefunc.zfile_func64);
else
us.z_filefunc = *pzlib_filefunc64_32_def;
us.is64bitOpenFunction = is64bitOpenFunction;
us.filestream = ZOPEN64(us.z_filefunc,
path,
ZLIB_FILEFUNC_MODE_READ |
ZLIB_FILEFUNC_MODE_EXISTING);
if (us.filestream==NULL)
return NULL;
central_pos = unz64local_SearchCentralDir64(&us.z_filefunc,us.filestream);
if (central_pos!=CENTRALDIRINVALID)
{
uLong uS;
ZPOS64_T uL64;
us.isZip64 = 1;
if (ZSEEK64(us.z_filefunc, us.filestream,
central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
err=UNZ_ERRNO;
/* the signature, already checked */
if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
/* size of zip64 end of central directory record */
if (unz64local_getLong64(&us.z_filefunc, us.filestream,&uL64)!=UNZ_OK)
err=UNZ_ERRNO;
/* version made by */
if (unz64local_getShort(&us.z_filefunc, us.filestream,&uS)!=UNZ_OK)
err=UNZ_ERRNO;
/* version needed to extract */
if (unz64local_getShort(&us.z_filefunc, us.filestream,&uS)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of this disk */
if (unz64local_getLong(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of the disk with the start of the central directory */
if (unz64local_getLong(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)
err=UNZ_ERRNO;
/* total number of entries in the central directory on this disk */
if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.gi.number_entry)!=UNZ_OK)
err=UNZ_ERRNO;
/* total number of entries in the central directory */
if (unz64local_getLong64(&us.z_filefunc, us.filestream,&number_entry_CD)!=UNZ_OK)
err=UNZ_ERRNO;
if ((number_entry_CD!=us.gi.number_entry) ||
(number_disk_with_CD!=0) ||
(number_disk!=0))
err=UNZ_BADZIPFILE;
/* size of the central directory */
if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.size_central_dir)!=UNZ_OK)
err=UNZ_ERRNO;
/* offset of start of central directory with respect to the
starting disk number */
if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.offset_central_dir)!=UNZ_OK)
err=UNZ_ERRNO;
us.gi.size_comment = 0;
}
else
{
central_pos = unz64local_SearchCentralDir(&us.z_filefunc,us.filestream);
if (central_pos==CENTRALDIRINVALID)
err=UNZ_ERRNO;
us.isZip64 = 0;
if (ZSEEK64(us.z_filefunc, us.filestream,
central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
err=UNZ_ERRNO;
/* the signature, already checked */
if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of this disk */
if (unz64local_getShort(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of the disk with the start of the central directory */
if (unz64local_getShort(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)
err=UNZ_ERRNO;
/* total number of entries in the central dir on this disk */
if (unz64local_getShort(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
us.gi.number_entry = uL;
/* total number of entries in the central dir */
if (unz64local_getShort(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
number_entry_CD = uL;
if ((number_entry_CD!=us.gi.number_entry) ||
(number_disk_with_CD!=0) ||
(number_disk!=0))
err=UNZ_BADZIPFILE;
/* size of the central directory */
if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
us.size_central_dir = uL;
/* offset of start of central directory with respect to the
starting disk number */
if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
us.offset_central_dir = uL;
/* zipfile comment length */
if (unz64local_getShort(&us.z_filefunc, us.filestream,&us.gi.size_comment)!=UNZ_OK)
err=UNZ_ERRNO;
}
if ((central_pos<us.offset_central_dir+us.size_central_dir) &&
(err==UNZ_OK))
err=UNZ_BADZIPFILE;
if (err!=UNZ_OK)
{
ZCLOSE64(us.z_filefunc, us.filestream);
return NULL;
}
us.byte_before_the_zipfile = central_pos -
(us.offset_central_dir+us.size_central_dir);
us.central_pos = central_pos;
us.pfile_in_zip_read = NULL;
us.encrypted = 0;
s=(unz64_s*)ALLOC(sizeof(unz64_s));
if( s != NULL)
{
*s=us;
unzGoToFirstFile((unzFile)s);
}
return (unzFile)s;
}
extern unzFile ZEXPORT unzOpen2(const char *path,
zlib_filefunc_def* pzlib_filefunc32_def) {
if (pzlib_filefunc32_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
fill_zlib_filefunc64_32_def_from_filefunc32(&zlib_filefunc64_32_def_fill,pzlib_filefunc32_def);
return unzOpenInternal(path, &zlib_filefunc64_32_def_fill, 0);
}
else
return unzOpenInternal(path, NULL, 0);
}
extern unzFile ZEXPORT unzOpen2_64(const void *path,
zlib_filefunc64_def* pzlib_filefunc_def) {
if (pzlib_filefunc_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
zlib_filefunc64_32_def_fill.zfile_func64 = *pzlib_filefunc_def;
zlib_filefunc64_32_def_fill.ztell32_file = NULL;
zlib_filefunc64_32_def_fill.zseek32_file = NULL;
return unzOpenInternal(path, &zlib_filefunc64_32_def_fill, 1);
}
else
return unzOpenInternal(path, NULL, 1);
}
extern unzFile ZEXPORT unzOpen(const char *path) {
return unzOpenInternal(path, NULL, 0);
}
extern unzFile ZEXPORT unzOpen64(const void *path) {
return unzOpenInternal(path, NULL, 1);
}
/*
Close a ZipFile opened with unzOpen.
If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
these files MUST be closed with unzCloseCurrentFile before call unzClose.
return UNZ_OK if there is no problem. */
extern int ZEXPORT unzClose(unzFile file) {
unz64_s* s;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz64_s*)file;
if (s->pfile_in_zip_read!=NULL)
unzCloseCurrentFile(file);
ZCLOSE64(s->z_filefunc, s->filestream);
free(s);
return UNZ_OK;
}
/*
Write info about the ZipFile in the *pglobal_info structure.
No preparation of the structure is needed
return UNZ_OK if there is no problem. */
extern int ZEXPORT unzGetGlobalInfo64(unzFile file, unz_global_info64* pglobal_info) {
unz64_s* s;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz64_s*)file;
*pglobal_info=s->gi;
return UNZ_OK;
}
extern int ZEXPORT unzGetGlobalInfo(unzFile file, unz_global_info* pglobal_info32) {
unz64_s* s;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz64_s*)file;
/* to do : check if number_entry is not truncated */
pglobal_info32->number_entry = (uLong)s->gi.number_entry;
pglobal_info32->size_comment = s->gi.size_comment;
return UNZ_OK;
}
/*
Translate date/time from Dos format to tm_unz (readable more easily)
*/
local void unz64local_DosDateToTmuDate(ZPOS64_T ulDosDate, tm_unz* ptm) {
ZPOS64_T uDate;
uDate = (ZPOS64_T)(ulDosDate>>16);
ptm->tm_mday = (int)(uDate&0x1f) ;
ptm->tm_mon = (int)((((uDate)&0x1E0)/0x20)-1) ;
ptm->tm_year = (int)(((uDate&0x0FE00)/0x0200)+1980) ;
ptm->tm_hour = (int) ((ulDosDate &0xF800)/0x800);
ptm->tm_min = (int) ((ulDosDate&0x7E0)/0x20) ;
ptm->tm_sec = (int) (2*(ulDosDate&0x1f)) ;
}
/*
Get Info about the current file in the zipfile, with internal only info
*/
local int 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) {
unz64_s* s;
unz_file_info64 file_info;
unz_file_info64_internal file_info_internal;
int err=UNZ_OK;
uLong uMagic;
long lSeek=0;
uLong uL;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz64_s*)file;
if (ZSEEK64(s->z_filefunc, s->filestream,
s->pos_in_central_dir+s->byte_before_the_zipfile,
ZLIB_FILEFUNC_SEEK_SET)!=0)
err=UNZ_ERRNO;
/* we check the magic */
if (err==UNZ_OK)
{
if (unz64local_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
err=UNZ_ERRNO;
else if (uMagic!=0x02014b50)
err=UNZ_BADZIPFILE;
}
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.version) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.version_needed) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.compression_method) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UNZ_OK)
err=UNZ_ERRNO;
unz64local_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
err=UNZ_ERRNO;
file_info.compressed_size = uL;
if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
err=UNZ_ERRNO;
file_info.uncompressed_size = uL;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_extra) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_comment) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) != UNZ_OK)
err=UNZ_ERRNO;
// relative offset of local header
if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
err=UNZ_ERRNO;
file_info_internal.offset_curfile = uL;
lSeek+=file_info.size_filename;
if ((err==UNZ_OK) && (szFileName!=NULL))
{
uLong uSizeRead ;
if (file_info.size_filename<fileNameBufferSize)
{
*(szFileName+file_info.size_filename)='\0';
uSizeRead = file_info.size_filename;
}
else
uSizeRead = fileNameBufferSize;
if ((file_info.size_filename>0) && (fileNameBufferSize>0))
if (ZREAD64(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeRead)
err=UNZ_ERRNO;
lSeek -= uSizeRead;
}
// Read extrafield
if ((err==UNZ_OK) && (extraField!=NULL))
{
ZPOS64_T uSizeRead ;
if (file_info.size_file_extra<extraFieldBufferSize)
uSizeRead = file_info.size_file_extra;
else
uSizeRead = extraFieldBufferSize;
if (lSeek!=0)
{
if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
lSeek=0;
else
err=UNZ_ERRNO;
}
if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
if (ZREAD64(s->z_filefunc, s->filestream,extraField,(uLong)uSizeRead)!=uSizeRead)
err=UNZ_ERRNO;
lSeek += file_info.size_file_extra - (uLong)uSizeRead;
}
else
lSeek += file_info.size_file_extra;
if ((err==UNZ_OK) && (file_info.size_file_extra != 0))
{
uLong acc = 0;
// since lSeek now points to after the extra field we need to move back
lSeek -= file_info.size_file_extra;
if (lSeek!=0)
{
if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
lSeek=0;
else
err=UNZ_ERRNO;
}
while(acc < file_info.size_file_extra)
{
uLong headerId;
uLong dataSize;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&headerId) != UNZ_OK)
err=UNZ_ERRNO;
if (unz64local_getShort(&s->z_filefunc, s->filestream,&dataSize) != UNZ_OK)
err=UNZ_ERRNO;
/* ZIP64 extra fields */
if (headerId == 0x0001)
{
if(file_info.uncompressed_size == MAXU32)
{
if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK)
err=UNZ_ERRNO;
}
if(file_info.compressed_size == MAXU32)
{
if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK)
err=UNZ_ERRNO;
}
if(file_info_internal.offset_curfile == MAXU32)
{
/* Relative Header offset */
if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK)
err=UNZ_ERRNO;
}
if(file_info.disk_num_start == 0xffff)
{
/* Disk Start Number */
if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK)
err=UNZ_ERRNO;
}
}
else
{
if (ZSEEK64(s->z_filefunc, s->filestream,dataSize,ZLIB_FILEFUNC_SEEK_CUR)!=0)
err=UNZ_ERRNO;
}
acc += 2 + 2 + dataSize;
}
}
if ((err==UNZ_OK) && (szComment!=NULL))
{
uLong uSizeRead ;
if (file_info.size_file_comment<commentBufferSize)
{
*(szComment+file_info.size_file_comment)='\0';
uSizeRead = file_info.size_file_comment;
}
else
uSizeRead = commentBufferSize;
if (lSeek!=0)
{
if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
lSeek=0;
else
err=UNZ_ERRNO;
}
if ((file_info.size_file_comment>0) && (commentBufferSize>0))
if (ZREAD64(s->z_filefunc, s->filestream,szComment,uSizeRead)!=uSizeRead)
err=UNZ_ERRNO;
lSeek+=file_info.size_file_comment - uSizeRead;
}
else
lSeek+=file_info.size_file_comment;
if ((err==UNZ_OK) && (pfile_info!=NULL))
*pfile_info=file_info;
if ((err==UNZ_OK) && (pfile_info_internal!=NULL))
*pfile_info_internal=file_info_internal;
return err;
}
/*