forked from Kitware/VTK
-
Notifications
You must be signed in to change notification settings - Fork 0
/
tif_read.c
1094 lines (1008 loc) · 32.8 KB
/
tif_read.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
/* $Id$ */
/*
* Copyright (c) 1988-1997 Sam Leffler
* Copyright (c) 1991-1997 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Sam Leffler and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Sam Leffler and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
/*
* TIFF Library.
* Scanline-oriented Read Support
*/
#include "tiffiop.h"
#include <stdio.h>
int TIFFFillStrip(TIFF* tif, uint32 strip);
int TIFFFillTile(TIFF* tif, uint32 tile);
static int TIFFStartStrip(TIFF* tif, uint32 strip);
static int TIFFStartTile(TIFF* tif, uint32 tile);
static int TIFFCheckRead(TIFF*, int);
static tmsize_t
TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size,const char* module);
#define NOSTRIP ((uint32)(-1)) /* undefined state */
#define NOTILE ((uint32)(-1)) /* undefined state */
static int
TIFFFillStripPartial( TIFF *tif, int strip, tmsize_t read_ahead, int restart )
{
static const char module[] = "TIFFFillStripPartial";
register TIFFDirectory *td = &tif->tif_dir;
tmsize_t unused_data;
uint64 read_offset;
tmsize_t cc, to_read;
/* tmsize_t bytecountm; */
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
/*
* Expand raw data buffer, if needed, to hold data
* strip coming from file (perhaps should set upper
* bound on the size of a buffer we'll use?).
*/
/* bytecountm=(tmsize_t) td->td_stripbytecount[strip]; */
if (read_ahead*2 > tif->tif_rawdatasize) {
assert( restart );
tif->tif_curstrip = NOSTRIP;
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
TIFFErrorExt(tif->tif_clientdata, module,
"Data buffer too small to hold part of strip %lu",
(unsigned long) strip);
return (0);
}
if (!TIFFReadBufferSetup(tif, 0, read_ahead*2))
return (0);
}
if( restart )
{
tif->tif_rawdataloaded = 0;
tif->tif_rawdataoff = 0;
}
/*
** If we are reading more data, move any unused data to the
** start of the buffer.
*/
if( tif->tif_rawdataloaded > 0 )
unused_data = tif->tif_rawdataloaded - (tif->tif_rawcp - tif->tif_rawdata);
else
unused_data = 0;
if( unused_data > 0 )
{
assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
memmove( tif->tif_rawdata, tif->tif_rawcp, unused_data );
}
/*
** Seek to the point in the file where more data should be read.
*/
read_offset = td->td_stripoffset[strip]
+ tif->tif_rawdataoff + tif->tif_rawdataloaded;
if (!SeekOK(tif, read_offset)) {
TIFFErrorExt(tif->tif_clientdata, module,
"Seek error at scanline %lu, strip %lu",
(unsigned long) tif->tif_row, (unsigned long) strip);
return 0;
}
/*
** How much do we want to read?
*/
to_read = tif->tif_rawdatasize - unused_data;
if( (uint64) to_read > td->td_stripbytecount[strip]
- tif->tif_rawdataoff - tif->tif_rawdataloaded )
{
to_read = (tmsize_t) td->td_stripbytecount[strip]
- tif->tif_rawdataoff - tif->tif_rawdataloaded;
}
assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
cc = TIFFReadFile(tif, tif->tif_rawdata + unused_data, to_read);
if (cc != to_read) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at scanline %lu; got %I64u bytes, expected %I64u",
(unsigned long) tif->tif_row,
(unsigned __int64) cc,
(unsigned __int64) to_read);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at scanline %lu; got %llu bytes, expected %llu",
(unsigned long) tif->tif_row,
(unsigned long long) cc,
(unsigned long long) to_read);
#endif
return 0;
}
tif->tif_rawdataoff = tif->tif_rawdataoff + tif->tif_rawdataloaded - unused_data ;
tif->tif_rawdataloaded = unused_data + to_read;
tif->tif_rawcp = tif->tif_rawdata;
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0) {
assert((tif->tif_flags&TIFF_BUFFERMMAP)==0);
TIFFReverseBits(tif->tif_rawdata + unused_data, to_read );
}
/*
** When starting a strip from the beginning we need to
** restart the decoder.
*/
if( restart )
return TIFFStartStrip(tif, strip);
else
return 1;
}
/*
* Seek to a random row+sample in a file.
*
* Only used by TIFFReadScanline, and is only used on
* strip organized files. We do some tricky stuff to try
* and avoid reading the whole compressed raw data for big
* strips.
*/
static int
TIFFSeek(TIFF* tif, uint32 row, uint16 sample )
{
register TIFFDirectory *td = &tif->tif_dir;
uint32 strip;
int whole_strip;
tmsize_t read_ahead = 0;
/*
** Establish what strip we are working from.
*/
if (row >= td->td_imagelength) { /* out of range */
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"%lu: Row out of range, max %lu",
(unsigned long) row,
(unsigned long) td->td_imagelength);
return (0);
}
if (td->td_planarconfig == PLANARCONFIG_SEPARATE) {
if (sample >= td->td_samplesperpixel) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"%lu: Sample out of range, max %lu",
(unsigned long) sample, (unsigned long) td->td_samplesperpixel);
return (0);
}
strip = (uint32)sample*td->td_stripsperimage + row/td->td_rowsperstrip;
} else
strip = row / td->td_rowsperstrip;
/*
* Do we want to treat this strip as one whole chunk or
* read it a few lines at a time?
*/
#if defined(CHUNKY_STRIP_READ_SUPPORT)
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
whole_strip = tif->tif_dir.td_stripbytecount[strip] < 10
|| isMapped(tif);
#else
whole_strip = 1;
#endif
if( !whole_strip )
{
read_ahead = tif->tif_scanlinesize * 16 + 5000;
}
/*
* If we haven't loaded this strip, do so now, possibly
* only reading the first part.
*/
if (strip != tif->tif_curstrip) { /* different strip, refill */
if( whole_strip )
{
if (!TIFFFillStrip(tif, strip))
return (0);
}
else
{
if( !TIFFFillStripPartial(tif,strip,read_ahead,1) )
return 0;
}
}
/*
** If we already have some data loaded, do we need to read some more?
*/
else if( !whole_strip )
{
if( ((tif->tif_rawdata + tif->tif_rawdataloaded) - tif->tif_rawcp) < read_ahead
&& (uint64) tif->tif_rawdataoff+tif->tif_rawdataloaded < td->td_stripbytecount[strip] )
{
if( !TIFFFillStripPartial(tif,strip,read_ahead,0) )
return 0;
}
}
if (row < tif->tif_row) {
/*
* Moving backwards within the same strip: backup
* to the start and then decode forward (below).
*
* NB: If you're planning on lots of random access within a
* strip, it's better to just read and decode the entire
* strip, and then access the decoded data in a random fashion.
*/
if( tif->tif_rawdataoff != 0 )
{
if( !TIFFFillStripPartial(tif,strip,read_ahead,1) )
return 0;
}
else
{
if (!TIFFStartStrip(tif, strip))
return (0);
}
}
if (row != tif->tif_row) {
/*
* Seek forward to the desired row.
*/
/* TODO: Will this really work with partial buffers? */
if (!(*tif->tif_seek)(tif, row - tif->tif_row))
return (0);
tif->tif_row = row;
}
return (1);
}
int
TIFFReadScanline(TIFF* tif, void* buf, uint32 row, uint16 sample)
{
int e;
if (!TIFFCheckRead(tif, 0))
return (-1);
if( (e = TIFFSeek(tif, row, sample)) != 0) {
/*
* Decompress desired row into user buffer.
*/
e = (*tif->tif_decoderow)
(tif, (uint8*) buf, tif->tif_scanlinesize, sample);
/* we are now poised at the beginning of the next row */
tif->tif_row = row + 1;
if (e)
(*tif->tif_postdecode)(tif, (uint8*) buf,
tif->tif_scanlinesize);
}
return (e > 0 ? 1 : -1);
}
/*
* Read a strip of data and decompress the specified
* amount into the user-supplied buffer.
*/
tmsize_t
TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size)
{
static const char module[] = "TIFFReadEncodedStrip";
TIFFDirectory *td = &tif->tif_dir;
uint32 rowsperstrip;
uint32 stripsperplane;
uint32 stripinplane;
uint16 plane;
uint32 rows;
tmsize_t stripsize;
if (!TIFFCheckRead(tif,0))
return((tmsize_t)(-1));
if (strip>=td->td_nstrips)
{
TIFFErrorExt(tif->tif_clientdata,module,
"%lu: Strip out of range, max %lu",(unsigned long)strip,
(unsigned long)td->td_nstrips);
return((tmsize_t)(-1));
}
/*
* Calculate the strip size according to the number of
* rows in the strip (check for truncated last strip on any
* of the separations).
*/
rowsperstrip=td->td_rowsperstrip;
if (rowsperstrip>td->td_imagelength)
rowsperstrip=td->td_imagelength;
stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip);
stripinplane=(strip%stripsperplane);
plane=(strip/stripsperplane);
rows=td->td_imagelength-stripinplane*rowsperstrip;
if (rows>rowsperstrip)
rows=rowsperstrip;
stripsize=TIFFVStripSize(tif,rows);
if (stripsize==0)
return((tmsize_t)(-1));
if ((size!=(tmsize_t)(-1))&&(size<stripsize))
stripsize=size;
if (!TIFFFillStrip(tif,strip))
return((tmsize_t)(-1));
if ((*tif->tif_decodestrip)(tif,buf,stripsize,plane)<=0)
return((tmsize_t)(-1));
(*tif->tif_postdecode)(tif,buf,stripsize);
return(stripsize);
}
static tmsize_t
TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size,
const char* module)
{
TIFFDirectory *td = &tif->tif_dir;
if (!_TIFFFillStriles( tif ))
return ((tmsize_t)(-1));
assert((tif->tif_flags&TIFF_NOREADRAW)==0);
if (!isMapped(tif)) {
tmsize_t cc;
if (!SeekOK(tif, td->td_stripoffset[strip])) {
TIFFErrorExt(tif->tif_clientdata, module,
"Seek error at scanline %lu, strip %lu",
(unsigned long) tif->tif_row, (unsigned long) strip);
return ((tmsize_t)(-1));
}
cc = TIFFReadFile(tif, buf, size);
if (cc != size) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at scanline %lu; got %I64u bytes, expected %I64u",
(unsigned long) tif->tif_row,
(unsigned __int64) cc,
(unsigned __int64) size);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at scanline %lu; got %llu bytes, expected %llu",
(unsigned long) tif->tif_row,
(unsigned long long) cc,
(unsigned long long) size);
#endif
return ((tmsize_t)(-1));
}
} else {
tmsize_t ma,mb;
tmsize_t n;
ma=(tmsize_t)td->td_stripoffset[strip];
mb=ma+size;
if (((uint64)ma!=td->td_stripoffset[strip])||(ma>tif->tif_size))
n=0;
else if ((mb<ma)||(mb<size)||(mb>tif->tif_size))
n=tif->tif_size-ma;
else
n=size;
if (n!=size) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at scanline %lu, strip %lu; got %I64u bytes, expected %I64u",
(unsigned long) tif->tif_row,
(unsigned long) strip,
(unsigned __int64) n,
(unsigned __int64) size);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at scanline %lu, strip %lu; got %llu bytes, expected %llu",
(unsigned long) tif->tif_row,
(unsigned long) strip,
(unsigned long long) n,
(unsigned long long) size);
#endif
return ((tmsize_t)(-1));
}
_TIFFmemcpy(buf, tif->tif_base + ma,
size);
}
return (size);
}
/*
* Read a strip of data from the file.
*/
tmsize_t
TIFFReadRawStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size)
{
static const char module[] = "TIFFReadRawStrip";
TIFFDirectory *td = &tif->tif_dir;
uint64 bytecount;
tmsize_t bytecountm;
if (!TIFFCheckRead(tif, 0))
return ((tmsize_t)(-1));
if (strip >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, module,
"%lu: Strip out of range, max %lu",
(unsigned long) strip,
(unsigned long) td->td_nstrips);
return ((tmsize_t)(-1));
}
if (tif->tif_flags&TIFF_NOREADRAW)
{
TIFFErrorExt(tif->tif_clientdata, module,
"Compression scheme does not support access to raw uncompressed data");
return ((tmsize_t)(-1));
}
bytecount = td->td_stripbytecount[strip];
if ((int64)bytecount <= 0) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"%I64u: Invalid strip byte count, strip %lu",
(unsigned __int64) bytecount,
(unsigned long) strip);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"%llu: Invalid strip byte count, strip %lu",
(unsigned long long) bytecount,
(unsigned long) strip);
#endif
return ((tmsize_t)(-1));
}
bytecountm = (tmsize_t)bytecount;
if ((uint64)bytecountm!=bytecount) {
TIFFErrorExt(tif->tif_clientdata, module, "Integer overflow");
return ((tmsize_t)(-1));
}
if (size != (tmsize_t)(-1) && size < bytecountm)
bytecountm = size;
return (TIFFReadRawStrip1(tif, strip, buf, bytecountm, module));
}
/*
* Read the specified strip and setup for decoding. The data buffer is
* expanded, as necessary, to hold the strip's data.
*/
int
TIFFFillStrip(TIFF* tif, uint32 strip)
{
static const char module[] = "TIFFFillStrip";
TIFFDirectory *td = &tif->tif_dir;
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
{
uint64 bytecount = td->td_stripbytecount[strip];
if ((int64)bytecount <= 0) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Invalid strip byte count %I64u, strip %lu",
(unsigned __int64) bytecount,
(unsigned long) strip);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Invalid strip byte count %llu, strip %lu",
(unsigned long long) bytecount,
(unsigned long) strip);
#endif
return (0);
}
if (isMapped(tif) &&
(isFillOrder(tif, td->td_fillorder)
|| (tif->tif_flags & TIFF_NOBITREV))) {
/*
* The image is mapped into memory and we either don't
* need to flip bits or the compression routine is
* going to handle this operation itself. In this
* case, avoid copying the raw data and instead just
* reference the data from the memory mapped file
* image. This assumes that the decompression
* routines do not modify the contents of the raw data
* buffer (if they try to, the application will get a
* fault since the file is mapped read-only).
*/
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
_TIFFfree(tif->tif_rawdata);
tif->tif_rawdata = NULL;
tif->tif_rawdatasize = 0;
}
tif->tif_flags &= ~TIFF_MYBUFFER;
/*
* We must check for overflow, potentially causing
* an OOB read. Instead of simple
*
* td->td_stripoffset[strip]+bytecount > tif->tif_size
*
* comparison (which can overflow) we do the following
* two comparisons:
*/
if (bytecount > (uint64)tif->tif_size ||
td->td_stripoffset[strip] > (uint64)tif->tif_size - bytecount) {
/*
* This error message might seem strange, but
* it's what would happen if a read were done
* instead.
*/
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Read error on strip %lu; "
"got %I64u bytes, expected %I64u",
(unsigned long) strip,
(unsigned __int64) tif->tif_size - td->td_stripoffset[strip],
(unsigned __int64) bytecount);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Read error on strip %lu; "
"got %llu bytes, expected %llu",
(unsigned long) strip,
(unsigned long long) tif->tif_size - td->td_stripoffset[strip],
(unsigned long long) bytecount);
#endif
tif->tif_curstrip = NOSTRIP;
return (0);
}
tif->tif_rawdatasize = (tmsize_t)bytecount;
tif->tif_rawdata = tif->tif_base + (tmsize_t)td->td_stripoffset[strip];
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = (tmsize_t) bytecount;
/*
* When we have tif_rawdata reference directly into the memory mapped file
* we need to be pretty careful about how we use the rawdata. It is not
* a general purpose working buffer as it normally otherwise is. So we
* keep track of this fact to avoid using it improperly.
*/
tif->tif_flags |= TIFF_BUFFERMMAP;
} else {
/*
* Expand raw data buffer, if needed, to hold data
* strip coming from file (perhaps should set upper
* bound on the size of a buffer we'll use?).
*/
tmsize_t bytecountm;
bytecountm=(tmsize_t)bytecount;
if ((uint64)bytecountm!=bytecount)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
return(0);
}
if (bytecountm > tif->tif_rawdatasize) {
tif->tif_curstrip = NOSTRIP;
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
TIFFErrorExt(tif->tif_clientdata, module,
"Data buffer too small to hold strip %lu",
(unsigned long) strip);
return (0);
}
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
return (0);
}
if (tif->tif_flags&TIFF_BUFFERMMAP) {
tif->tif_curstrip = NOSTRIP;
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
return (0);
}
if (TIFFReadRawStrip1(tif, strip, tif->tif_rawdata,
bytecountm, module) != bytecountm)
return (0);
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = bytecountm;
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(tif->tif_rawdata, bytecountm);
}
}
return (TIFFStartStrip(tif, strip));
}
/*
* Tile-oriented Read Support
* Contributed by Nancy Cam (Silicon Graphics).
*/
/*
* Read and decompress a tile of data. The
* tile is selected by the (x,y,z,s) coordinates.
*/
tmsize_t
TIFFReadTile(TIFF* tif, void* buf, uint32 x, uint32 y, uint32 z, uint16 s)
{
if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s))
return ((tmsize_t)(-1));
return (TIFFReadEncodedTile(tif,
TIFFComputeTile(tif, x, y, z, s), buf, (tmsize_t)(-1)));
}
/*
* Read a tile of data and decompress the specified
* amount into the user-supplied buffer.
*/
tmsize_t
TIFFReadEncodedTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size)
{
static const char module[] = "TIFFReadEncodedTile";
TIFFDirectory *td = &tif->tif_dir;
tmsize_t tilesize = tif->tif_tilesize;
if (!TIFFCheckRead(tif, 1))
return ((tmsize_t)(-1));
if (tile >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, module,
"%lu: Tile out of range, max %lu",
(unsigned long) tile, (unsigned long) td->td_nstrips);
return ((tmsize_t)(-1));
}
if (size == (tmsize_t)(-1))
size = tilesize;
else if (size > tilesize)
size = tilesize;
if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif,
(uint8*) buf, size, (uint16)(tile/td->td_stripsperimage))) {
(*tif->tif_postdecode)(tif, (uint8*) buf, size);
return (size);
} else
return ((tmsize_t)(-1));
}
static tmsize_t
TIFFReadRawTile1(TIFF* tif, uint32 tile, void* buf, tmsize_t size, const char* module)
{
TIFFDirectory *td = &tif->tif_dir;
if (!_TIFFFillStriles( tif ))
return ((tmsize_t)(-1));
assert((tif->tif_flags&TIFF_NOREADRAW)==0);
if (!isMapped(tif)) {
tmsize_t cc;
if (!SeekOK(tif, td->td_stripoffset[tile])) {
TIFFErrorExt(tif->tif_clientdata, module,
"Seek error at row %lu, col %lu, tile %lu",
(unsigned long) tif->tif_row,
(unsigned long) tif->tif_col,
(unsigned long) tile);
return ((tmsize_t)(-1));
}
cc = TIFFReadFile(tif, buf, size);
if (cc != size) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at row %lu, col %lu; got %I64u bytes, expected %I64u",
(unsigned long) tif->tif_row,
(unsigned long) tif->tif_col,
(unsigned __int64) cc,
(unsigned __int64) size);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at row %lu, col %lu; got %llu bytes, expected %llu",
(unsigned long) tif->tif_row,
(unsigned long) tif->tif_col,
(unsigned long long) cc,
(unsigned long long) size);
#endif
return ((tmsize_t)(-1));
}
} else {
tmsize_t ma,mb;
tmsize_t n;
ma=(tmsize_t)td->td_stripoffset[tile];
mb=ma+size;
if (((uint64)ma!=td->td_stripoffset[tile])||(ma>tif->tif_size))
n=0;
else if ((mb<ma)||(mb<size)||(mb>tif->tif_size))
n=tif->tif_size-ma;
else
n=size;
if (n!=size) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at row %lu, col %lu, tile %lu; got %I64u bytes, expected %I64u",
(unsigned long) tif->tif_row,
(unsigned long) tif->tif_col,
(unsigned long) tile,
(unsigned __int64) n,
(unsigned __int64) size);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Read error at row %lu, col %lu, tile %lu; got %llu bytes, expected %llu",
(unsigned long) tif->tif_row,
(unsigned long) tif->tif_col,
(unsigned long) tile,
(unsigned long long) n,
(unsigned long long) size);
#endif
return ((tmsize_t)(-1));
}
_TIFFmemcpy(buf, tif->tif_base + ma, size);
}
return (size);
}
/*
* Read a tile of data from the file.
*/
tmsize_t
TIFFReadRawTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size)
{
static const char module[] = "TIFFReadRawTile";
TIFFDirectory *td = &tif->tif_dir;
uint64 bytecount64;
tmsize_t bytecountm;
if (!TIFFCheckRead(tif, 1))
return ((tmsize_t)(-1));
if (tile >= td->td_nstrips) {
TIFFErrorExt(tif->tif_clientdata, module,
"%lu: Tile out of range, max %lu",
(unsigned long) tile, (unsigned long) td->td_nstrips);
return ((tmsize_t)(-1));
}
if (tif->tif_flags&TIFF_NOREADRAW)
{
TIFFErrorExt(tif->tif_clientdata, module,
"Compression scheme does not support access to raw uncompressed data");
return ((tmsize_t)(-1));
}
bytecount64 = td->td_stripbytecount[tile];
if (size != (tmsize_t)(-1) && (uint64)size < bytecount64)
bytecount64 = (uint64)size;
bytecountm = (tmsize_t)bytecount64;
if ((uint64)bytecountm!=bytecount64)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
return ((tmsize_t)(-1));
}
return (TIFFReadRawTile1(tif, tile, buf, bytecountm, module));
}
/*
* Read the specified tile and setup for decoding. The data buffer is
* expanded, as necessary, to hold the tile's data.
*/
int
TIFFFillTile(TIFF* tif, uint32 tile)
{
static const char module[] = "TIFFFillTile";
TIFFDirectory *td = &tif->tif_dir;
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
{
uint64 bytecount = td->td_stripbytecount[tile];
if ((int64)bytecount <= 0) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"%I64u: Invalid tile byte count, tile %lu",
(unsigned __int64) bytecount,
(unsigned long) tile);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"%llu: Invalid tile byte count, tile %lu",
(unsigned long long) bytecount,
(unsigned long) tile);
#endif
return (0);
}
if (isMapped(tif) &&
(isFillOrder(tif, td->td_fillorder)
|| (tif->tif_flags & TIFF_NOBITREV))) {
/*
* The image is mapped into memory and we either don't
* need to flip bits or the compression routine is
* going to handle this operation itself. In this
* case, avoid copying the raw data and instead just
* reference the data from the memory mapped file
* image. This assumes that the decompression
* routines do not modify the contents of the raw data
* buffer (if they try to, the application will get a
* fault since the file is mapped read-only).
*/
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
_TIFFfree(tif->tif_rawdata);
tif->tif_rawdata = NULL;
tif->tif_rawdatasize = 0;
}
tif->tif_flags &= ~TIFF_MYBUFFER;
/*
* We must check for overflow, potentially causing
* an OOB read. Instead of simple
*
* td->td_stripoffset[tile]+bytecount > tif->tif_size
*
* comparison (which can overflow) we do the following
* two comparisons:
*/
if (bytecount > (uint64)tif->tif_size ||
td->td_stripoffset[tile] > (uint64)tif->tif_size - bytecount) {
tif->tif_curtile = NOTILE;
return (0);
}
tif->tif_rawdatasize = (tmsize_t)bytecount;
tif->tif_rawdata =
tif->tif_base + (tmsize_t)td->td_stripoffset[tile];
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = (tmsize_t) bytecount;
tif->tif_flags |= TIFF_BUFFERMMAP;
} else {
/*
* Expand raw data buffer, if needed, to hold data
* tile coming from file (perhaps should set upper
* bound on the size of a buffer we'll use?).
*/
tmsize_t bytecountm;
bytecountm=(tmsize_t)bytecount;
if ((uint64)bytecountm!=bytecount)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
return(0);
}
if (bytecountm > tif->tif_rawdatasize) {
tif->tif_curtile = NOTILE;
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
TIFFErrorExt(tif->tif_clientdata, module,
"Data buffer too small to hold tile %lu",
(unsigned long) tile);
return (0);
}
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
return (0);
}
if (tif->tif_flags&TIFF_BUFFERMMAP) {
tif->tif_curtile = NOTILE;
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
return (0);
}
if (TIFFReadRawTile1(tif, tile, tif->tif_rawdata,
bytecountm, module) != bytecountm)
return (0);
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = bytecountm;
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(tif->tif_rawdata,
tif->tif_rawdataloaded);
}
}
return (TIFFStartTile(tif, tile));
}
/*
* Setup the raw data buffer in preparation for
* reading a strip of raw data. If the buffer
* is specified as zero, then a buffer of appropriate
* size is allocated by the library. Otherwise,
* the client must guarantee that the buffer is
* large enough to hold any individual strip of
* raw data.
*/
int
TIFFReadBufferSetup(TIFF* tif, void* bp, tmsize_t size)
{
static const char module[] = "TIFFReadBufferSetup";
assert((tif->tif_flags&TIFF_NOREADRAW)==0);
tif->tif_flags &= ~TIFF_BUFFERMMAP;
if (tif->tif_rawdata) {
if (tif->tif_flags & TIFF_MYBUFFER)
_TIFFfree(tif->tif_rawdata);
tif->tif_rawdata = NULL;
tif->tif_rawdatasize = 0;
}
if (bp) {
tif->tif_rawdatasize = size;
tif->tif_rawdata = (uint8*) bp;
tif->tif_flags &= ~TIFF_MYBUFFER;
} else {
tif->tif_rawdatasize = (tmsize_t)TIFFroundup_64((uint64)size, 1024);
if (tif->tif_rawdatasize==0) {
TIFFErrorExt(tif->tif_clientdata, module,
"Invalid buffer size");
return (0);
}
tif->tif_rawdata = (uint8*) _TIFFmalloc(tif->tif_rawdatasize);
tif->tif_flags |= TIFF_MYBUFFER;
}
if (tif->tif_rawdata == NULL) {
TIFFErrorExt(tif->tif_clientdata, module,
"No space for data buffer at scanline %lu",
(unsigned long) tif->tif_row);
tif->tif_rawdatasize = 0;
return (0);
}
return (1);
}
/*
* Set state to appear as if a
* strip has just been read in.
*/
static int
TIFFStartStrip(TIFF* tif, uint32 strip)
{
TIFFDirectory *td = &tif->tif_dir;
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {
if (!(*tif->tif_setupdecode)(tif))
return (0);
tif->tif_flags |= TIFF_CODERSETUP;
}
tif->tif_curstrip = strip;
tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;
tif->tif_flags &= ~TIFF_BUF4WRITE;
if (tif->tif_flags&TIFF_NOREADRAW)
{
tif->tif_rawcp = NULL;
tif->tif_rawcc = 0;
}
else
{
tif->tif_rawcp = tif->tif_rawdata;
tif->tif_rawcc = (tmsize_t)td->td_stripbytecount[strip];
}
return ((*tif->tif_predecode)(tif,
(uint16)(strip / td->td_stripsperimage)));
}
/*
* Set state to appear as if a
* tile has just been read in.
*/
static int
TIFFStartTile(TIFF* tif, uint32 tile)
{
static const char module[] = "TIFFStartTile";
TIFFDirectory *td = &tif->tif_dir;
uint32 howmany32;
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
if ((tif->tif_flags & TIFF_CODERSETUP) == 0) {