-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathZipFile.cpp
More file actions
1290 lines (1271 loc) · 38.7 KB
/
ZipFile.cpp
File metadata and controls
1290 lines (1271 loc) · 38.7 KB
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
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Access to Zip archives.
//
#include "ZipFile.h"
#define DEF_MEM_LEVEL 8 // normally in zutil.h?
#include <memory.h>
#include <sys/stat.h>
#include <errno.h>
#include <assert.h>
using namespace android;
//
///*
// * Some environments require the "b", some choke on it.
// */
//#define FILE_OPEN_RO "rb"
//#define FILE_OPEN_RW "r+b"
//#define FILE_OPEN_RW_CREATE "w+b"
//
///* should live somewhere else? */
//static status_t errnoToStatus(int err)
//{
// if (err == ENOENT)
// return NAME_NOT_FOUND;
// else if (err == EACCES)
// return PERMISSION_DENIED;
// else
// return (status_t)UNKNOWN_ERROR;
//}
//
///*
// * Open a file and parse its guts.
// */
//status_t ZipFile::open(const char* zipFileName, int flags)
//{
// bool newArchive = false;
//
// assert(mZipFp == NULL); // no reopen
//
// if ((flags & kOpenTruncate))
// flags |= kOpenCreate; // trunc implies create
//
// if ((flags & kOpenReadOnly) && (flags & kOpenReadWrite))
// return INVALID_OPERATION; // not both
// if (!((flags & kOpenReadOnly) || (flags & kOpenReadWrite)))
// return INVALID_OPERATION; // not neither
// if ((flags & kOpenCreate) && !(flags & kOpenReadWrite))
// return INVALID_OPERATION; // create requires write
//
// if (flags & kOpenTruncate) {
// newArchive = true;
// } else {
// newArchive = (access(zipFileName, F_OK) != 0);
// if (!(flags & kOpenCreate) && newArchive) {
// /* not creating, must already exist */
// ALOGD("File %s does not exist", zipFileName);
// return NAME_NOT_FOUND;
// }
// }
//
// /* open the file */
// const char* openflags;
// if (flags & kOpenReadWrite) {
// if (newArchive)
// openflags = FILE_OPEN_RW_CREATE;
// else
// openflags = FILE_OPEN_RW;
// } else {
// openflags = FILE_OPEN_RO;
// }
// mZipFp = fopen(zipFileName, openflags);
// if (mZipFp == NULL) {
// int err = errno;
// ALOGD("fopen failed: %d\n", err);
// return errnoToStatus(err);
// }
//
// status_t result;
// if (!newArchive) {
// /*
// * Load the central directory. If that fails, then this probably
// * isn't a Zip archive.
// */
// result = readCentralDir();
// } else {
// /*
// * Newly-created. The EndOfCentralDir constructor actually
// * sets everything to be the way we want it (all zeroes). We
// * set mNeedCDRewrite so that we create *something* if the
// * caller doesn't add any files. (We could also just unlink
// * the file if it's brand new and nothing was added, but that's
// * probably doing more than we really should -- the user might
// * have a need for empty zip files.)
// */
// mNeedCDRewrite = true;
// result = NO_ERROR;
// }
//
// if (flags & kOpenReadOnly)
// mReadOnly = true;
// else
// assert(!mReadOnly);
//
// return result;
//}
//
///*
// * Return the Nth entry in the archive.
// */
//ZipEntry* ZipFile::getEntryByIndex(int idx) const
//{
// if (idx < 0 || idx >= (int) mEntries.size())
// return NULL;
//
// return mEntries[idx];
//}
//
///*
// * Find an entry by name.
// */
//ZipEntry* ZipFile::getEntryByName(const char* fileName) const
//{
// /*
// * Do a stupid linear string-compare search.
// *
// * There are various ways to speed this up, especially since it's rare
// * to intermingle changes to the archive with "get by name" calls. We
// * don't want to sort the mEntries vector itself, however, because
// * it's used to recreate the Central Directory.
// *
// * (Hash table works, parallel list of pointers in sorted order is good.)
// */
// int idx;
//
// for (idx = mEntries.size()-1; idx >= 0; idx--) {
// ZipEntry* pEntry = mEntries[idx];
// if (!pEntry->getDeleted() &&
// strcmp(fileName, pEntry->getFileName()) == 0)
// {
// return pEntry;
// }
// }
//
// return NULL;
//}
//
///*
// * Empty the mEntries vector.
// */
//void ZipFile::discardEntries(void)
//{
// int count = mEntries.size();
//
// while (--count >= 0)
// delete mEntries[count];
//
// mEntries.clear();
//}
//
//
///*
// * Find the central directory and read the contents.
// *
// * The fun thing about ZIP archives is that they may or may not be
// * readable from start to end. In some cases, notably for archives
// * that were written to stdout, the only length information is in the
// * central directory at the end of the file.
// *
// * Of course, the central directory can be followed by a variable-length
// * comment field, so we have to scan through it backwards. The comment
// * is at most 64K, plus we have 18 bytes for the end-of-central-dir stuff
// * itself, plus apparently sometimes people throw random junk on the end
// * just for the fun of it.
// *
// * This is all a little wobbly. If the wrong value ends up in the EOCD
// * area, we're hosed. This appears to be the way that everbody handles
// * it though, so we're in pretty good company if this fails.
// */
//status_t ZipFile::readCentralDir(void)
//{
// status_t result = NO_ERROR;
// unsigned char* buf = NULL;
// off_t fileLength, seekStart;
// long readAmount;
// int i;
//
// fseek(mZipFp, 0, SEEK_END);
// fileLength = ftell(mZipFp);
// rewind(mZipFp);
//
// /* too small to be a ZIP archive? */
// if (fileLength < EndOfCentralDir::kEOCDLen) {
// ALOGD("Length is %ld -- too small\n", (long)fileLength);
// result = INVALID_OPERATION;
// goto bail;
// }
//
// buf = new unsigned char[EndOfCentralDir::kMaxEOCDSearch];
// if (buf == NULL) {
// ALOGD("Failure allocating %d bytes for EOCD search",
// EndOfCentralDir::kMaxEOCDSearch);
// result = NO_MEMORY;
// goto bail;
// }
//
// if (fileLength > EndOfCentralDir::kMaxEOCDSearch) {
// seekStart = fileLength - EndOfCentralDir::kMaxEOCDSearch;
// readAmount = EndOfCentralDir::kMaxEOCDSearch;
// } else {
// seekStart = 0;
// readAmount = (long) fileLength;
// }
// if (fseek(mZipFp, seekStart, SEEK_SET) != 0) {
// ALOGD("Failure seeking to end of zip at %ld", (long) seekStart);
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// /* read the last part of the file into the buffer */
// if (fread(buf, 1, readAmount, mZipFp) != (size_t) readAmount) {
// ALOGD("short file? wanted %ld\n", readAmount);
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// /* find the end-of-central-dir magic */
// for (i = readAmount - 4; i >= 0; i--) {
// if (buf[i] == 0x50 &&
// ZipEntry::getLongLE(&buf[i]) == EndOfCentralDir::kSignature)
// {
// ALOGV("+++ Found EOCD at buf+%d\n", i);
// break;
// }
// }
// if (i < 0) {
// ALOGD("EOCD not found, not Zip\n");
// result = INVALID_OPERATION;
// goto bail;
// }
//
// /* extract eocd values */
// result = mEOCD.readBuf(buf + i, readAmount - i);
// if (result != NO_ERROR) {
// ALOGD("Failure reading %ld bytes of EOCD values", readAmount - i);
// goto bail;
// }
// //mEOCD.dump();
//
// if (mEOCD.mDiskNumber != 0 || mEOCD.mDiskWithCentralDir != 0 ||
// mEOCD.mNumEntries != mEOCD.mTotalNumEntries)
// {
// ALOGD("Archive spanning not supported\n");
// result = INVALID_OPERATION;
// goto bail;
// }
//
// /*
// * So far so good. "mCentralDirSize" is the size in bytes of the
// * central directory, so we can just seek back that far to find it.
// * We can also seek forward mCentralDirOffset bytes from the
// * start of the file.
// *
// * We're not guaranteed to have the rest of the central dir in the
// * buffer, nor are we guaranteed that the central dir will have any
// * sort of convenient size. We need to skip to the start of it and
// * read the header, then the other goodies.
// *
// * The only thing we really need right now is the file comment, which
// * we're hoping to preserve.
// */
// if (fseek(mZipFp, mEOCD.mCentralDirOffset, SEEK_SET) != 0) {
// ALOGD("Failure seeking to central dir offset %ld\n",
// mEOCD.mCentralDirOffset);
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// /*
// * Loop through and read the central dir entries.
// */
// ALOGV("Scanning %d entries...\n", mEOCD.mTotalNumEntries);
// int entry;
// for (entry = 0; entry < mEOCD.mTotalNumEntries; entry++) {
// ZipEntry* pEntry = new ZipEntry;
//
// result = pEntry->initFromCDE(mZipFp);
// if (result != NO_ERROR) {
// ALOGD("initFromCDE failed\n");
// delete pEntry;
// goto bail;
// }
//
// mEntries.add(pEntry);
// }
//
//
// /*
// * If all went well, we should now be back at the EOCD.
// */
// {
// unsigned char checkBuf[4];
// if (fread(checkBuf, 1, 4, mZipFp) != 4) {
// ALOGD("EOCD check read failed\n");
// result = INVALID_OPERATION;
// goto bail;
// }
// if (ZipEntry::getLongLE(checkBuf) != EndOfCentralDir::kSignature) {
// ALOGD("EOCD read check failed\n");
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
// ALOGV("+++ EOCD read check passed\n");
// }
//
//bail:
// delete[] buf;
// return result;
//}
//
//
///*
// * Add a new file to the archive.
// *
// * This requires creating and populating a ZipEntry structure, and copying
// * the data into the file at the appropriate position. The "appropriate
// * position" is the current location of the central directory, which we
// * casually overwrite (we can put it back later).
// *
// * If we were concerned about safety, we would want to make all changes
// * in a temp file and then overwrite the original after everything was
// * safely written. Not really a concern for us.
// */
//status_t ZipFile::addCommon(const char* fileName, const void* data, size_t size,
// const char* storageName, int sourceType, int compressionMethod,
// ZipEntry** ppEntry)
//{
// ZipEntry* pEntry = NULL;
// status_t result = NO_ERROR;
// long lfhPosn, startPosn, endPosn, uncompressedLen;
// FILE* inputFp = NULL;
// unsigned long crc;
// time_t modWhen;
//
// if (mReadOnly)
// return INVALID_OPERATION;
//
// assert(compressionMethod == ZipEntry::kCompressDeflated ||
// compressionMethod == ZipEntry::kCompressStored);
//
// /* make sure we're in a reasonable state */
// assert(mZipFp != NULL);
// assert(mEntries.size() == mEOCD.mTotalNumEntries);
//
// /* make sure it doesn't already exist */
// if (getEntryByName(storageName) != NULL)
// return ALREADY_EXISTS;
//
// if (!data) {
// inputFp = fopen(fileName, FILE_OPEN_RO);
// if (inputFp == NULL)
// return errnoToStatus(errno);
// }
//
// if (fseek(mZipFp, mEOCD.mCentralDirOffset, SEEK_SET) != 0) {
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// pEntry = new ZipEntry;
// pEntry->initNew(storageName, NULL);
//
// /*
// * From here on out, failures are more interesting.
// */
// mNeedCDRewrite = true;
//
// /*
// * Write the LFH, even though it's still mostly blank. We need it
// * as a place-holder. In theory the LFH isn't necessary, but in
// * practice some utilities demand it.
// */
// lfhPosn = ftell(mZipFp);
// pEntry->mLFH.write(mZipFp);
// startPosn = ftell(mZipFp);
//
// /*
// * Copy the data in, possibly compressing it as we go.
// */
// if (sourceType == ZipEntry::kCompressStored) {
// if (compressionMethod == ZipEntry::kCompressDeflated) {
// bool failed = false;
// result = compressFpToFp(mZipFp, inputFp, data, size, &crc);
// if (result != NO_ERROR) {
// ALOGD("compression failed, storing\n");
// failed = true;
// } else {
// /*
// * Make sure it has compressed "enough". This probably ought
// * to be set through an API call, but I don't expect our
// * criteria to change over time.
// */
// long src = inputFp ? ftell(inputFp) : size;
// long dst = ftell(mZipFp) - startPosn;
// if (dst + (dst / 10) > src) {
// ALOGD("insufficient compression (src=%ld dst=%ld), storing\n",
// src, dst);
// failed = true;
// }
// }
//
// if (failed) {
// compressionMethod = ZipEntry::kCompressStored;
// if (inputFp) rewind(inputFp);
// fseek(mZipFp, startPosn, SEEK_SET);
// /* fall through to kCompressStored case */
// }
// }
// /* handle "no compression" request, or failed compression from above */
// if (compressionMethod == ZipEntry::kCompressStored) {
// if (inputFp) {
// result = copyFpToFp(mZipFp, inputFp, &crc);
// } else {
// result = copyDataToFp(mZipFp, data, size, &crc);
// }
// if (result != NO_ERROR) {
// // don't need to truncate; happens in CDE rewrite
// ALOGD("failed copying data in\n");
// goto bail;
// }
// }
//
// // currently seeked to end of file
// uncompressedLen = inputFp ? ftell(inputFp) : size;
// } else if (sourceType == ZipEntry::kCompressDeflated) {
// /* we should support uncompressed-from-compressed, but it's not
// * important right now */
// assert(compressionMethod == ZipEntry::kCompressDeflated);
//
// bool scanResult;
// int method;
// long compressedLen;
//
// scanResult = ZipUtils::examineGzip(inputFp, &method, &uncompressedLen,
// &compressedLen, &crc);
// if (!scanResult || method != ZipEntry::kCompressDeflated) {
// ALOGD("this isn't a deflated gzip file?");
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// result = copyPartialFpToFp(mZipFp, inputFp, compressedLen, NULL);
// if (result != NO_ERROR) {
// ALOGD("failed copying gzip data in\n");
// goto bail;
// }
// } else {
// assert(false);
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// /*
// * We could write the "Data Descriptor", but there doesn't seem to
// * be any point since we're going to go back and write the LFH.
// *
// * Update file offsets.
// */
// endPosn = ftell(mZipFp); // seeked to end of compressed data
//
// /*
// * Success! Fill out new values.
// */
// pEntry->setDataInfo(uncompressedLen, endPosn - startPosn, crc,
// compressionMethod);
// modWhen = getModTime(inputFp ? fileno(inputFp) : fileno(mZipFp));
// pEntry->setModWhen(modWhen);
// pEntry->setLFHOffset(lfhPosn);
// mEOCD.mNumEntries++;
// mEOCD.mTotalNumEntries++;
// mEOCD.mCentralDirSize = 0; // mark invalid; set by flush()
// mEOCD.mCentralDirOffset = endPosn;
//
// /*
// * Go back and write the LFH.
// */
// if (fseek(mZipFp, lfhPosn, SEEK_SET) != 0) {
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
// pEntry->mLFH.write(mZipFp);
//
// /*
// * Add pEntry to the list.
// */
// mEntries.add(pEntry);
// if (ppEntry != NULL)
// *ppEntry = pEntry;
// pEntry = NULL;
//
//bail:
// if (inputFp != NULL)
// fclose(inputFp);
// delete pEntry;
// return result;
//}
//
///*
// * Add an entry by copying it from another zip file. If "padding" is
// * nonzero, the specified number of bytes will be added to the "extra"
// * field in the header.
// *
// * If "ppEntry" is non-NULL, a pointer to the new entry will be returned.
// */
//status_t ZipFile::add(const ZipFile* pSourceZip, const ZipEntry* pSourceEntry,
// int padding, ZipEntry** ppEntry)
//{
// ZipEntry* pEntry = NULL;
// status_t result;
// long lfhPosn, endPosn;
//
// if (mReadOnly)
// return INVALID_OPERATION;
//
// /* make sure we're in a reasonable state */
// assert(mZipFp != NULL);
// assert(mEntries.size() == mEOCD.mTotalNumEntries);
//
// if (fseek(mZipFp, mEOCD.mCentralDirOffset, SEEK_SET) != 0) {
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// pEntry = new ZipEntry;
// if (pEntry == NULL) {
// result = NO_MEMORY;
// goto bail;
// }
//
// result = pEntry->initFromExternal(pSourceZip, pSourceEntry);
// if (result != NO_ERROR)
// goto bail;
// if (padding != 0) {
// result = pEntry->addPadding(padding);
// if (result != NO_ERROR)
// goto bail;
// }
//
// /*
// * From here on out, failures are more interesting.
// */
// mNeedCDRewrite = true;
//
// /*
// * Write the LFH. Since we're not recompressing the data, we already
// * have all of the fields filled out.
// */
// lfhPosn = ftell(mZipFp);
// pEntry->mLFH.write(mZipFp);
//
// /*
// * Copy the data over.
// *
// * If the "has data descriptor" flag is set, we want to copy the DD
// * fields as well. This is a fixed-size area immediately following
// * the data.
// */
// if (fseek(pSourceZip->mZipFp, pSourceEntry->getFileOffset(), SEEK_SET) != 0)
// {
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// off_t copyLen;
// copyLen = pSourceEntry->getCompressedLen();
// if ((pSourceEntry->mLFH.mGPBitFlag & ZipEntry::kUsesDataDescr) != 0)
// copyLen += ZipEntry::kDataDescriptorLen;
//
// if (copyPartialFpToFp(mZipFp, pSourceZip->mZipFp, copyLen, NULL)
// != NO_ERROR)
// {
// ALOGW("copy of '%s' failed\n", pEntry->mCDE.mFileName);
// result = (status_t)UNKNOWN_ERROR;
// goto bail;
// }
//
// /*
// * Update file offsets.
// */
// endPosn = ftell(mZipFp);
//
// /*
// * Success! Fill out new values.
// */
// pEntry->setLFHOffset(lfhPosn); // sets mCDE.mLocalHeaderRelOffset
// mEOCD.mNumEntries++;
// mEOCD.mTotalNumEntries++;
// mEOCD.mCentralDirSize = 0; // mark invalid; set by flush()
// mEOCD.mCentralDirOffset = endPosn;
//
// /*
// * Add pEntry to the list.
// */
// mEntries.add(pEntry);
// if (ppEntry != NULL)
// *ppEntry = pEntry;
// pEntry = NULL;
//
// result = NO_ERROR;
//
//bail:
// delete pEntry;
// return result;
//}
//
///*
// * Copy all of the bytes in "src" to "dst".
// *
// * On exit, "srcFp" will be seeked to the end of the file, and "dstFp"
// * will be seeked immediately past the data.
// */
//status_t ZipFile::copyFpToFp(FILE* dstFp, FILE* srcFp, unsigned long* pCRC32)
//{
// unsigned char tmpBuf[32768];
// size_t count;
//
// *pCRC32 = crc32(0L, Z_NULL, 0);
//
// while (1) {
// count = fread(tmpBuf, 1, sizeof(tmpBuf), srcFp);
// if (ferror(srcFp) || ferror(dstFp))
// return errnoToStatus(errno);
// if (count == 0)
// break;
//
// *pCRC32 = crc32(*pCRC32, tmpBuf, count);
//
// if (fwrite(tmpBuf, 1, count, dstFp) != count) {
// ALOGD("fwrite %d bytes failed\n", (int) count);
// return (status_t)UNKNOWN_ERROR;
// }
// }
//
// return NO_ERROR;
//}
//
///*
// * Copy all of the bytes in "src" to "dst".
// *
// * On exit, "dstFp" will be seeked immediately past the data.
// */
//status_t ZipFile::copyDataToFp(FILE* dstFp,
// const void* data, size_t size, unsigned long* pCRC32)
//{
// size_t count;
//
// *pCRC32 = crc32(0L, Z_NULL, 0);
// if (size > 0) {
// *pCRC32 = crc32(*pCRC32, (const unsigned char*)data, size);
// if (fwrite(data, 1, size, dstFp) != size) {
// ALOGD("fwrite %d bytes failed\n", (int) size);
// return (status_t)UNKNOWN_ERROR;
// }
// }
//
// return NO_ERROR;
//}
//
///*
// * Copy some of the bytes in "src" to "dst".
// *
// * If "pCRC32" is NULL, the CRC will not be computed.
// *
// * On exit, "srcFp" will be seeked to the end of the file, and "dstFp"
// * will be seeked immediately past the data just written.
// */
//status_t ZipFile::copyPartialFpToFp(FILE* dstFp, FILE* srcFp, long length,
// unsigned long* pCRC32)
//{
// unsigned char tmpBuf[32768];
// size_t count;
//
// if (pCRC32 != NULL)
// *pCRC32 = crc32(0L, Z_NULL, 0);
//
// while (length) {
// long readSize;
//
// readSize = sizeof(tmpBuf);
// if (readSize > length)
// readSize = length;
//
// count = fread(tmpBuf, 1, readSize, srcFp);
// if ((long) count != readSize) { // error or unexpected EOF
// ALOGD("fread %d bytes failed\n", (int) readSize);
// return (status_t)UNKNOWN_ERROR;
// }
//
// if (pCRC32 != NULL)
// *pCRC32 = crc32(*pCRC32, tmpBuf, count);
//
// if (fwrite(tmpBuf, 1, count, dstFp) != count) {
// ALOGD("fwrite %d bytes failed\n", (int) count);
// return (status_t)UNKNOWN_ERROR;
// }
//
// length -= readSize;
// }
//
// return NO_ERROR;
//}
//
///*
// * Compress all of the data in "srcFp" and write it to "dstFp".
// *
// * On exit, "srcFp" will be seeked to the end of the file, and "dstFp"
// * will be seeked immediately past the compressed data.
// */
//status_t ZipFile::compressFpToFp(FILE* dstFp, FILE* srcFp,
// const void* data, size_t size, unsigned long* pCRC32)
//{
// status_t result = NO_ERROR;
// const size_t kBufSize = 32768;
// unsigned char* inBuf = NULL;
// unsigned char* outBuf = NULL;
// z_stream zstream;
// bool atEof = false; // no feof() aviailable yet
// unsigned long crc;
// int zerr;
//
// /*
// * Create an input buffer and an output buffer.
// */
// inBuf = new unsigned char[kBufSize];
// outBuf = new unsigned char[kBufSize];
// if (inBuf == NULL || outBuf == NULL) {
// result = NO_MEMORY;
// goto bail;
// }
//
// /*
// * Initialize the zlib stream.
// */
// memset(&zstream, 0, sizeof(zstream));
// zstream.zalloc = Z_NULL;
// zstream.zfree = Z_NULL;
// zstream.opaque = Z_NULL;
// zstream.next_in = NULL;
// zstream.avail_in = 0;
// zstream.next_out = outBuf;
// zstream.avail_out = kBufSize;
// zstream.data_type = Z_UNKNOWN;
//
// zerr = deflateInit2(&zstream, Z_BEST_COMPRESSION,
// Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
// if (zerr != Z_OK) {
// result = (status_t)UNKNOWN_ERROR;
// if (zerr == Z_VERSION_ERROR) {
// ALOGE("Installed zlib is not compatible with linked version (%s)\n",
// ZLIB_VERSION);
// } else {
// ALOGD("Call to deflateInit2 failed (zerr=%d)\n", zerr);
// }
// goto bail;
// }
//
// crc = crc32(0L, Z_NULL, 0);
//
// /*
// * Loop while we have data.
// */
// do {
// size_t getSize;
// int flush;
//
// /* only read if the input buffer is empty */
// if (zstream.avail_in == 0 && !atEof) {
// ALOGV("+++ reading %d bytes\n", (int)kBufSize);
// if (data) {
// getSize = size > kBufSize ? kBufSize : size;
// memcpy(inBuf, data, getSize);
// data = ((const char*)data) + getSize;
// size -= getSize;
// } else {
// getSize = fread(inBuf, 1, kBufSize, srcFp);
// if (ferror(srcFp)) {
// ALOGD("deflate read failed (errno=%d)\n", errno);
// goto z_bail;
// }
// }
// if (getSize < kBufSize) {
// ALOGV("+++ got %d bytes, EOF reached\n",
// (int)getSize);
// atEof = true;
// }
//
// crc = crc32(crc, inBuf, getSize);
//
// zstream.next_in = inBuf;
// zstream.avail_in = getSize;
// }
//
// if (atEof)
// flush = Z_FINISH; /* tell zlib that we're done */
// else
// flush = Z_NO_FLUSH; /* more to come! */
//
// zerr = deflate(&zstream, flush);
// if (zerr != Z_OK && zerr != Z_STREAM_END) {
// ALOGD("zlib deflate call failed (zerr=%d)\n", zerr);
// result = (status_t)UNKNOWN_ERROR;
// goto z_bail;
// }
//
// /* write when we're full or when we're done */
// if (zstream.avail_out == 0 ||
// (zerr == Z_STREAM_END && zstream.avail_out != (uInt) kBufSize))
// {
// ALOGV("+++ writing %d bytes\n", (int) (zstream.next_out - outBuf));
// if (fwrite(outBuf, 1, zstream.next_out - outBuf, dstFp) !=
// (size_t)(zstream.next_out - outBuf))
// {
// ALOGD("write %d failed in deflate\n",
// (int) (zstream.next_out - outBuf));
// goto z_bail;
// }
//
// zstream.next_out = outBuf;
// zstream.avail_out = kBufSize;
// }
// } while (zerr == Z_OK);
//
// assert(zerr == Z_STREAM_END); /* other errors should've been caught */
//
// *pCRC32 = crc;
//
//z_bail:
// deflateEnd(&zstream); /* free up any allocated structures */
//
//bail:
// delete[] inBuf;
// delete[] outBuf;
//
// return result;
//}
//
///*
// * Mark an entry as deleted.
// *
// * We will eventually need to crunch the file down, but if several files
// * are being removed (perhaps as part of an "update" process) we can make
// * things considerably faster by deferring the removal to "flush" time.
// */
//status_t ZipFile::remove(ZipEntry* pEntry)
//{
// /*
// * Should verify that pEntry is actually part of this archive, and
// * not some stray ZipEntry from a different file.
// */
//
// /* mark entry as deleted, and mark archive as dirty */
// pEntry->setDeleted();
// mNeedCDRewrite = true;
// return NO_ERROR;
//}
//
///*
// * Flush any pending writes.
// *
// * In particular, this will crunch out deleted entries, and write the
// * Central Directory and EOCD if we have stomped on them.
// */
//status_t ZipFile::flush(void)
//{
// status_t result = NO_ERROR;
// long eocdPosn;
// int i, count;
//
// if (mReadOnly)
// return INVALID_OPERATION;
// if (!mNeedCDRewrite)
// return NO_ERROR;
//
// assert(mZipFp != NULL);
//
// result = crunchArchive();
// if (result != NO_ERROR)
// return result;
//
// if (fseek(mZipFp, mEOCD.mCentralDirOffset, SEEK_SET) != 0)
// return (status_t)UNKNOWN_ERROR;
//
// count = mEntries.size();
// for (i = 0; i < count; i++) {
// ZipEntry* pEntry = mEntries[i];
// pEntry->mCDE.write(mZipFp);
// }
//
// eocdPosn = ftell(mZipFp);
// mEOCD.mCentralDirSize = eocdPosn - mEOCD.mCentralDirOffset;
//
// mEOCD.write(mZipFp);
//
// /*
// * If we had some stuff bloat up during compression and get replaced
// * with plain files, or if we deleted some entries, there's a lot
// * of wasted space at the end of the file. Remove it now.
// */
// if (ftruncate(fileno(mZipFp), ftell(mZipFp)) != 0) {
// ALOGW("ftruncate failed %ld: %s\n", ftell(mZipFp), strerror(errno));
// // not fatal
// }
//
// /* should we clear the "newly added" flag in all entries now? */
//
// mNeedCDRewrite = false;
// return NO_ERROR;
//}
//
///*
// * Crunch deleted files out of an archive by shifting the later files down.
// *
// * Because we're not using a temp file, we do the operation inside the
// * current file.
// */
//status_t ZipFile::crunchArchive(void)
//{
// status_t result = NO_ERROR;
// int i, count;
// long delCount, adjust;
//
//#if 0
// printf("CONTENTS:\n");
// for (i = 0; i < (int) mEntries.size(); i++) {
// printf(" %d: lfhOff=%ld del=%d\n",
// i, mEntries[i]->getLFHOffset(), mEntries[i]->getDeleted());
// }
// printf(" END is %ld\n", (long) mEOCD.mCentralDirOffset);
//#endif
//
// /*
// * Roll through the set of files, shifting them as appropriate. We
// * could probably get a slight performance improvement by sliding
// * multiple files down at once (because we could use larger reads
// * when operating on batches of small files), but it's not that useful.
// */
// count = mEntries.size();
// delCount = adjust = 0;
// for (i = 0; i < count; i++) {
// ZipEntry* pEntry = mEntries[i];
// long span;
//
// if (pEntry->getLFHOffset() != 0) {
// long nextOffset;
//
// /* Get the length of this entry by finding the offset
// * of the next entry. Directory entries don't have
// * file offsets, so we need to find the next non-directory
// * entry.
// */
// nextOffset = 0;
// for (int ii = i+1; nextOffset == 0 && ii < count; ii++)
// nextOffset = mEntries[ii]->getLFHOffset();
// if (nextOffset == 0)
// nextOffset = mEOCD.mCentralDirOffset;
// span = nextOffset - pEntry->getLFHOffset();
//
// assert(span >= ZipEntry::LocalFileHeader::kLFHLen);
// } else {
// /* This is a directory entry. It doesn't have
// * any actual file contents, so there's no need to
// * move anything.
// */
// span = 0;
// }
//
// //printf("+++ %d: off=%ld span=%ld del=%d [count=%d]\n",
// // i, pEntry->getLFHOffset(), span, pEntry->getDeleted(), count);
//
// if (pEntry->getDeleted()) {
// adjust += span;
// delCount++;
//