summaryrefslogtreecommitdiff
path: root/tiff/contrib/pds/tif_pdsdirwrite.c
blob: eb71d4229246c8ed5ccb57d0aa2c84edd404803a (plain)
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
/* $Header: /cvs/maptools/cvsroot/libtiff/contrib/pds/tif_pdsdirwrite.c,v 1.3.2.1 2010-06-08 18:50:41 bfriesen Exp $ */

/* When writing data to TIFF files, it is often useful to store application-
   specific data in a private TIFF directory so that the tags don't need to
   be registered and won't conflict with other people's user-defined tags.
   One needs to have a registered public tag which contains some amount of
   raw data. That raw data, however, is interpreted at an independent,
   separate, private tiff directory. This file provides some routines which
   will be useful for converting that data from its raw binary form into
   the proper form for your application.
*/

/*
 * Copyright (c) 1988-1996 Sam Leffler
 * Copyright (c) 1991-1996 Silicon Graphics, Inc.
 * Copyright (c( 1996 USAF Phillips Laboratory
 *
 * 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.
 *
 * These routines written by Conrad J. Poelman on a single late-night of
 * March 20-21, 1996.
 *
 * The entire purpose of this file is to provide a single external function,
 * TIFFWritePrivateDataSubDirectory(). This function is intended for use
 * in writing a private subdirectory structure into a TIFF file. The
 * actual reading of data from the structure is handled by the getFieldFn(),
 * which is passed to TIFFWritePrivateDataSubDirectory() as a parameter. The
 * idea is to enable any application wishing to read private subdirectories to
 * do so easily using this function, without modifying the TIFF library.
 *
 * The astute observer will notice that only two functions are at all different
 * from the original tif_dirwrite.c file: TIFFWritePrivateDataSubDirectory()and
 * TIFFWriteNormalSubTag(). All the other stuff that makes this file so huge
 * is only necessary because all of those functions are declared static in
 * tif_dirwrite.c, so we have to totally duplicate them in order to use them.
 *
 * Oh, also please note the bug-fix in the routine TIFFWriteNormalSubTag(),
 * which equally should be applied to TIFFWriteNormalTag().
 *
 */
#include "tiffiop.h"

#if HAVE_IEEEFP
#define	TIFFCvtNativeToIEEEFloat(tif, n, fp)
#define	TIFFCvtNativeToIEEEDouble(tif, n, dp)
#else
extern	void TIFFCvtNativeToIEEEFloat(TIFF*, uint32, float*);
extern	void TIFFCvtNativeToIEEEDouble(TIFF*, uint32, double*);
#endif

static	int TIFFWriteNormalTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*);
static	int TIFFWriteNormalSubTag(TIFF*, TIFFDirEntry*, const TIFFFieldInfo*,
				  int (*getFieldFn)(TIFF *tif,ttag_t tag,...));
static	void TIFFSetupShortLong(TIFF*, ttag_t, TIFFDirEntry*, uint32);
static	int TIFFSetupShortPair(TIFF*, ttag_t, TIFFDirEntry*);
static	int TIFFWritePerSampleShorts(TIFF*, ttag_t, TIFFDirEntry*);
static	int TIFFWritePerSampleAnys(TIFF*, TIFFDataType, ttag_t, TIFFDirEntry*);
static	int TIFFWriteShortTable(TIFF*, ttag_t, TIFFDirEntry*, uint32, uint16**);
static	int TIFFWriteShortArray(TIFF*,
	    TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint16*);
static	int TIFFWriteLongArray(TIFF *,
	    TIFFDataType, ttag_t, TIFFDirEntry*, uint32, uint32*);
static	int TIFFWriteRationalArray(TIFF *,
	    TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
static	int TIFFWriteFloatArray(TIFF *,
	    TIFFDataType, ttag_t, TIFFDirEntry*, uint32, float*);
static	int TIFFWriteDoubleArray(TIFF *,
	    TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
static	int TIFFWriteByteArray(TIFF*, TIFFDirEntry*, char*);
static	int TIFFWriteAnyArray(TIFF*,
	    TIFFDataType, ttag_t, TIFFDirEntry*, uint32, double*);
#ifdef COLORIMETRY_SUPPORT
static	int TIFFWriteTransferFunction(TIFF*, TIFFDirEntry*);
#endif
static	int TIFFWriteData(TIFF*, TIFFDirEntry*, char*);
static	int TIFFLinkDirectory(TIFF*);

#define	WriteRationalPair(type, tag1, v1, tag2, v2) {		\
	if (!TIFFWriteRational(tif, type, tag1, dir, v1))	\
		goto bad;					\
	if (!TIFFWriteRational(tif, type, tag2, dir+1, v2))	\
		goto bad;					\
	dir++;							\
}
#define	TIFFWriteRational(tif, type, tag, dir, v) \
	TIFFWriteRationalArray((tif), (type), (tag), (dir), 1, &(v))
#ifndef TIFFWriteRational
static	int TIFFWriteRational(TIFF*,
	    TIFFDataType, ttag_t, TIFFDirEntry*, float);
#endif

/* This function will write an entire directory to the disk, and return the
   offset value indicating where in the file it wrote the beginning of the
   directory structure. This is NOT the same as the offset value before
   calling this function, because some of the fields may have caused various
   data items to be written out BEFORE writing the directory structure.

   This code was basically written by ripping of the TIFFWriteDirectory() 
   code and generalizing it, using RPS's TIFFWritePliIfd() code for
   inspiration.  My original goal was to make this code general enough that
   the original TIFFWriteDirectory() could be rewritten to just call this
   function with the appropriate field and field-accessing arguments.

   However, now I realize that there's a lot of code that gets executed for
   the main, standard TIFF directories that does not apply to special
   private subdirectories, so such a reimplementation for the sake of
   eliminating redundant or duplicate code is probably not possible,
   unless we also pass in a Main flag to indiciate which type of handling
   to do, which would be kind of a hack. I've marked those places where I
   changed or ripped out code which would have to be re-inserted to
   generalize this function. If it can be done in a clean and graceful way,
   it would be a great way to generalize the TIFF library. Otherwise, I'll
   just leave this code here where it duplicates but remains on top of and
   hopefully mostly independent of the main TIFF library.

   The caller will probably want to free the sub directory structure after
   returning from this call, since otherwise once written out, the user
   is likely to forget about it and leave data lying around.
*/
toff_t
TIFFWritePrivateDataSubDirectory(TIFF* tif,
				 uint32 pdir_fieldsset[], int pdir_fields_last,
				 TIFFFieldInfo *field_info,
				 int (*getFieldFn)(TIFF *tif, ttag_t tag, ...))
{
	uint16 dircount;
	uint32 diroff, nextdiroff;
	ttag_t tag;
	uint32 nfields;
	tsize_t dirsize;
	char* data;
	TIFFDirEntry* dir;
	u_long b, *fields, fields_size;
	toff_t directory_offset;
	TIFFFieldInfo* fip;

	/*
	 * Deleted out all of the encoder flushing and such code from here -
	 * not necessary for subdirectories.
	 */

	/* Finish writing out any image data. */
	TIFFFlushData(tif);

	/*
	 * Size the directory so that we can calculate
	 * offsets for the data items that aren't kept
	 * in-place in each field.
	 */
	nfields = 0;
	for (b = 0; b <= pdir_fields_last; b++)
		if (FieldSet(pdir_fieldsset, b))
			/* Deleted code to make size of first 4 tags 2
			   instead of 1. */
			nfields += 1;
	dirsize = nfields * sizeof (TIFFDirEntry);
	data = (char*) _TIFFmalloc(dirsize);
	if (data == NULL) {
		TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
		    "Cannot write private subdirectory, out of space");
		return (0);
	}
	/*
	 * Place directory in data section of the file. If there isn't one
	 * yet, place it at the end of the file. The directory is treated as
	 * data, so we don't link it into the directory structure at all.
	 */
	if (tif->tif_dataoff == 0)
	    tif->tif_dataoff =(TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;
	diroff = tif->tif_dataoff;
	tif->tif_dataoff = (toff_t)(
	    diroff + sizeof (uint16) + dirsize + sizeof (toff_t));
	if (tif->tif_dataoff & 1)
		tif->tif_dataoff++;
	(void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET);
	/*tif->tif_curdir++;*/
	dir = (TIFFDirEntry*) data;
	/*
	 * Setup external form of directory
	 * entries and write data items.
	 */
	/*
	 * We make a local copy of the fieldsset here so that we don't mess
	 * up the original one when we call ResetFieldBit(). But I'm not sure
	 * why the original code calls ResetFieldBit(), since we're already
	 * going through the fields in order...
	 *
	 * fields_size is the number of uint32's we will need to hold the
	 * bit-mask for all of the fields. If our highest field number is
	 * 100, then we'll need 100 / (8*4)+1 == 4 uint32's to hold the
	 * fieldset.
	 *
	 * Unlike the original code, we allocate fields dynamically based
	 * on the requested pdir_fields_last value, allowing private
	 * data subdirectories to contain more than the built-in code's limit
	 * of 95 tags in a directory.
	 */
	fields_size = pdir_fields_last / (8*sizeof(uint32)) + 1;
	fields = _TIFFmalloc(fields_size*sizeof(uint32));
	_TIFFmemcpy(fields, pdir_fieldsset, fields_size * sizeof(uint32));

	/* Deleted "write out extra samples tag" code here. */

	/* Deleted code for checking a billion little special cases for the
	 * standard TIFF tags. Should add a general mechanism for overloading
	 * write function for each field, just like Brian kept telling me!!!
	 */
	for (fip = field_info; fip->field_tag; fip++) {
		/* Deleted code to check for FIELD_IGNORE!! */
		if (/* fip->field_bit == FIELD_IGNORE || */
		    !FieldSet(fields, fip->field_bit))
			continue;
		if (!TIFFWriteNormalSubTag(tif, dir, fip, getFieldFn))
			goto bad;
		dir++;
		ResetFieldBit(fields, fip->field_bit);
	}

	/* Now we've written all of the referenced data, and are about to
	   write the main directory structure, so grab the tif_dataoff value
	   now so we can remember where we wrote the directory. */
	directory_offset = tif->tif_dataoff;

	/*
	 * Write directory.
	 */
	dircount = (uint16) nfields;
	/* Deleted code to link to the next directory - we set it to zero! */
	nextdiroff = 0;
	if (tif->tif_flags & TIFF_SWAB) {
		/*
		 * The file's byte order is opposite to the
		 * native machine architecture.  We overwrite
		 * the directory information with impunity
		 * because it'll be released below after we
		 * write it to the file.  Note that all the
		 * other tag construction routines assume that
		 * we do this byte-swapping; i.e. they only
		 * byte-swap indirect data.
		 */
		for (dir = (TIFFDirEntry*) data; dircount; dir++, dircount--) {
			TIFFSwabArrayOfShort(&dir->tdir_tag, 2);
			TIFFSwabArrayOfLong(&dir->tdir_count, 2);
		}
		dircount = (uint16) nfields;
		TIFFSwabShort(&dircount);
		TIFFSwabLong(&nextdiroff);
	}

	(void) TIFFSeekFile(tif, tif->tif_dataoff, SEEK_SET);
	if (!WriteOK(tif, &dircount, sizeof (dircount))) {
		TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory count");
		goto bad;
	}
	if (!WriteOK(tif, data, dirsize)) {
		TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory contents");
		goto bad;
	}
	if (!WriteOK(tif, &nextdiroff, sizeof (nextdiroff))) {
		TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing private subdirectory link");
		goto bad;
	}
	tif->tif_dataoff += sizeof(dircount) + dirsize + sizeof(nextdiroff);

	_TIFFfree(data);
	_TIFFfree(fields);
	tif->tif_flags &= ~TIFF_DIRTYDIRECT;

#if (0)
	/* This stuff commented out because I don't think we want it for
	   subdirectories, but I could be wrong. */
	(*tif->tif_cleanup)(tif);

	/*
	 * Reset directory-related state for subsequent
	 * directories.
	 */
	TIFFDefaultDirectory(tif);
	tif->tif_curoff = 0;
	tif->tif_row = (uint32) -1;
	tif->tif_curstrip = (tstrip_t) -1;
#endif

	return (directory_offset);
bad:
	_TIFFfree(data);
	_TIFFfree(fields);
	return (0);
}
#undef WriteRationalPair

/*
 * Process tags that are not special cased.
 */
/* The standard function TIFFWriteNormalTag() could definitely be replaced
   with a simple call to this function, just adding TIFFGetField() as the
   last argument. */
static int
TIFFWriteNormalSubTag(TIFF* tif, TIFFDirEntry* dir, const TIFFFieldInfo* fip,
		      int (*getFieldFn)(TIFF *tif, ttag_t tag, ...))
{
	u_short wc = (u_short) fip->field_writecount;

	dir->tdir_tag = fip->field_tag;
	dir->tdir_type = (u_short) fip->field_type;
	dir->tdir_count = wc;
#define	WRITEF(x,y)	x(tif, fip->field_type, fip->field_tag, dir, wc, y)
	switch (fip->field_type) {
	case TIFF_SHORT:
	case TIFF_SSHORT:
		if (wc > 1) {
			uint16* wp;
			if (wc == (u_short) TIFF_VARIABLE) {
				(*getFieldFn)(tif, fip->field_tag, &wc, &wp);
				dir->tdir_count = wc;
			} else
				(*getFieldFn)(tif, fip->field_tag, &wp);
			if (!WRITEF(TIFFWriteShortArray, wp))
				return (0);
		} else {
			uint16 sv;
			(*getFieldFn)(tif, fip->field_tag, &sv);
			dir->tdir_offset =
			    TIFFInsertData(tif, dir->tdir_type, sv);
		}
		break;
	case TIFF_LONG:
	case TIFF_SLONG:
		if (wc > 1) {
			uint32* lp;
			if (wc == (u_short) TIFF_VARIABLE) {
				(*getFieldFn)(tif, fip->field_tag, &wc, &lp);
				dir->tdir_count = wc;
			} else
				(*getFieldFn)(tif, fip->field_tag, &lp);
			if (!WRITEF(TIFFWriteLongArray, lp))
				return (0);
		} else {
			/* XXX handle LONG->SHORT conversion */
			(*getFieldFn)(tif, fip->field_tag, &dir->tdir_offset);
		}
		break;
	case TIFF_RATIONAL:
	case TIFF_SRATIONAL:
		if (wc > 1) {
			float* fp;
			if (wc == (u_short) TIFF_VARIABLE) {
				(*getFieldFn)(tif, fip->field_tag, &wc, &fp);
				dir->tdir_count = wc;
			} else
				(*getFieldFn)(tif, fip->field_tag, &fp);
			if (!WRITEF(TIFFWriteRationalArray, fp))
				return (0);
		} else {
			float fv;
			(*getFieldFn)(tif, fip->field_tag, &fv);
			if (!WRITEF(TIFFWriteRationalArray, &fv))
				return (0);
		}
		break;
	case TIFF_FLOAT:
		if (wc > 1) {
			float* fp;
			if (wc == (u_short) TIFF_VARIABLE) {
				(*getFieldFn)(tif, fip->field_tag, &wc, &fp);
				dir->tdir_count = wc;
			} else
				(*getFieldFn)(tif, fip->field_tag, &fp);
			if (!WRITEF(TIFFWriteFloatArray, fp))
				return (0);
		} else {
			float fv;
			(*getFieldFn)(tif, fip->field_tag, &fv);
			if (!WRITEF(TIFFWriteFloatArray, &fv))
				return (0);
		}
		break;
	case TIFF_DOUBLE:
		/* Hey - I think this is a bug, or at least a "gross
		   inconsistency", in the TIFF library. Look at the original
		   TIFF library code below within the "#if (0) ... #else".
		   Just from the type of *dp, you can see that this code
		   expects TIFFGetField() to be handed a double ** for
		   any TIFF_DOUBLE tag, even for the constant wc==1 case.
		   This is totally inconsistent with other fields (like
		   TIFF_FLOAT, above) and is also inconsistent with the
		   TIFFSetField() function for TIFF_DOUBLEs, which expects
		   to be passed a single double by value for the wc==1 case.
		   (See the handling of TIFFFetchNormalTag() in tif_dirread.c
		   for an example.) Maybe this function was written before
		   TIFFWriteDoubleArray() was written, not that that's an
		   excuse. Anyway, the new code below is a trivial modification
		   of the TIFF_FLOAT code above. The fact that even single
		   doubles get written out in the data segment and get an
		   offset value stored is irrelevant here - that is all
		   handled by TIFFWriteDoubleArray(). */
#if (0)
		{ double* dp;
		  if (wc == (u_short) TIFF_VARIABLE) {
			(*getFieldFn)(tif, fip->field_tag, &wc, &dp);
			dir->tdir_count = wc;
		  } else
			(*getFieldFn)(tif, fip->field_tag, &dp);
		  TIFFCvtNativeToIEEEDouble(tif, wc, dp);
		  if (!TIFFWriteData(tif, dir, (char*) dp))
			return (0);
		}
#else
		if (wc > 1) {
			double* dp;
			if (wc == (u_short) TIFF_VARIABLE) {
				(*getFieldFn)(tif, fip->field_tag, &wc, &dp);
				dir->tdir_count = wc;
			} else
				(*getFieldFn)(tif, fip->field_tag, &dp);
			if (!WRITEF(TIFFWriteDoubleArray, dp))
				return (0);
		} else {
			double dv;
			(*getFieldFn)(tif, fip->field_tag, &dv);
			if (!WRITEF(TIFFWriteDoubleArray, &dv))
				return (0);
		}
#endif
		break;
	case TIFF_ASCII:
		{ char* cp;
		  (*getFieldFn)(tif, fip->field_tag, &cp);
		  dir->tdir_count = (uint32) (strlen(cp) + 1);
		  if (!TIFFWriteByteArray(tif, dir, cp))
			return (0);
		}
		break;
	case TIFF_UNDEFINED:
		{ char* cp;
		  if (wc == (u_short) TIFF_VARIABLE) {
			(*getFieldFn)(tif, fip->field_tag, &wc, &cp);
			dir->tdir_count = wc;
		  } else 
			(*getFieldFn)(tif, fip->field_tag, &cp);
		  if (!TIFFWriteByteArray(tif, dir, cp))
			return (0);
		}
		break;
	}
	return (1);
}
#undef WRITEF

/* Everything after this is exactly duplicated from the standard tif_dirwrite.c
   file, necessitated by the fact that they are declared static there so
   we can't call them!
*/
/*
 * Setup a directory entry with either a SHORT
 * or LONG type according to the value.
 */
static void
TIFFSetupShortLong(TIFF* tif, ttag_t tag, TIFFDirEntry* dir, uint32 v)
{
	dir->tdir_tag = tag;
	dir->tdir_count = 1;
	if (v > 0xffffL) {
		dir->tdir_type = (short) TIFF_LONG;
		dir->tdir_offset = v;
	} else {
		dir->tdir_type = (short) TIFF_SHORT;
		dir->tdir_offset = TIFFInsertData(tif, (int) TIFF_SHORT, v);
	}
}
#undef MakeShortDirent

#ifndef TIFFWriteRational
/*
 * Setup a RATIONAL directory entry and
 * write the associated indirect value.
 */
static int
TIFFWriteRational(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, float v)
{
	return (TIFFWriteRationalArray(tif, type, tag, dir, 1, &v));
}
#endif

#define	NITEMS(x)	(sizeof (x) / sizeof (x[0]))
/*
 * Setup a directory entry that references a
 * samples/pixel array of SHORT values and
 * (potentially) write the associated indirect
 * values.
 */
static int
TIFFWritePerSampleShorts(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
{
	uint16 buf[10], v;
	uint16* w = buf;
	int i, status, samples = tif->tif_dir.td_samplesperpixel;

	if (samples > NITEMS(buf))
		w = (uint16*) _TIFFmalloc(samples * sizeof (uint16));
	TIFFGetField(tif, tag, &v);
	for (i = 0; i < samples; i++)
		w[i] = v;
	status = TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, samples, w);
	if (w != buf)
		_TIFFfree((char*) w);
	return (status);
}

/*
 * Setup a directory entry that references a samples/pixel array of ``type''
 * values and (potentially) write the associated indirect values.  The source
 * data from TIFFGetField() for the specified tag must be returned as double.
 */
static int
TIFFWritePerSampleAnys(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir)
{
	double buf[10], v;
	double* w = buf;
	int i, status;
	int samples = (int) tif->tif_dir.td_samplesperpixel;

	if (samples > NITEMS(buf))
		w = (double*) _TIFFmalloc(samples * sizeof (double));
	TIFFGetField(tif, tag, &v);
	for (i = 0; i < samples; i++)
		w[i] = v;
	status = TIFFWriteAnyArray(tif, type, tag, dir, samples, w);
	if (w != buf)
		_TIFFfree(w);
	return (status);
}
#undef NITEMS

/*
 * Setup a pair of shorts that are returned by
 * value, rather than as a reference to an array.
 */
static int
TIFFSetupShortPair(TIFF* tif, ttag_t tag, TIFFDirEntry* dir)
{
	uint16 v[2];

	TIFFGetField(tif, tag, &v[0], &v[1]);
	return (TIFFWriteShortArray(tif, TIFF_SHORT, tag, dir, 2, v));
}

/*
 * Setup a directory entry for an NxM table of shorts,
 * where M is known to be 2**bitspersample, and write
 * the associated indirect data.
 */
static int
TIFFWriteShortTable(TIFF* tif,
    ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16** table)
{
	uint32 i, off;

	dir->tdir_tag = tag;
	dir->tdir_type = (short) TIFF_SHORT;
	/* XXX -- yech, fool TIFFWriteData */
	dir->tdir_count = (uint32) (1L<<tif->tif_dir.td_bitspersample);
	off = tif->tif_dataoff;
	for (i = 0; i < n; i++)
		if (!TIFFWriteData(tif, dir, (char *)table[i]))
			return (0);
	dir->tdir_count *= n;
	dir->tdir_offset = off;
	return (1);
}

/*
 * Write/copy data associated with an ASCII or opaque tag value.
 */
static int
TIFFWriteByteArray(TIFF* tif, TIFFDirEntry* dir, char* cp)
{
	if (dir->tdir_count > 4) {
		if (!TIFFWriteData(tif, dir, cp))
			return (0);
	} else
		_TIFFmemcpy(&dir->tdir_offset, cp, dir->tdir_count);
	return (1);
}

/*
 * Setup a directory entry of an array of SHORT
 * or SSHORT and write the associated indirect values.
 */
static int
TIFFWriteShortArray(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint16* v)
{
	dir->tdir_tag = tag;
	dir->tdir_type = (short) type;
	dir->tdir_count = n;
	if (n <= 2) {
		if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
			dir->tdir_offset = (uint32) ((long) v[0] << 16);
			if (n == 2)
				dir->tdir_offset |= v[1] & 0xffff;
		} else {
			dir->tdir_offset = v[0] & 0xffff;
			if (n == 2)
				dir->tdir_offset |= (long) v[1] << 16;
		}
		return (1);
	} else
		return (TIFFWriteData(tif, dir, (char*) v));
}

/*
 * Setup a directory entry of an array of LONG
 * or SLONG and write the associated indirect values.
 */
static int
TIFFWriteLongArray(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, uint32* v)
{
	dir->tdir_tag = tag;
	dir->tdir_type = (short) type;
	dir->tdir_count = n;
	if (n == 1) {
		dir->tdir_offset = v[0];
		return (1);
	} else
		return (TIFFWriteData(tif, dir, (char*) v));
}

/*
 * Setup a directory entry of an array of RATIONAL
 * or SRATIONAL and write the associated indirect values.
 */
static int
TIFFWriteRationalArray(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
{
	uint32 i;
	uint32* t;
	int status;

	dir->tdir_tag = tag;
	dir->tdir_type = (short) type;
	dir->tdir_count = n;
	t = (uint32*) _TIFFmalloc(2*n * sizeof (uint32));
	for (i = 0; i < n; i++) {
		float fv = v[i];
		int sign = 1;
		uint32 den;

		if (fv < 0) {
			if (type == TIFF_RATIONAL) {
				TIFFWarning(tif->tif_name,
	"\"%s\": Information lost writing value (%g) as (unsigned) RATIONAL",
				_TIFFFieldWithTag(tif,tag)->field_name, v);
				fv = 0;
			} else
				fv = -fv, sign = -1;
		}
		den = 1L;
		if (fv > 0) {
			while (fv < 1L<<(31-3) && den < 1L<<(31-3))
				fv *= 1<<3, den *= 1L<<3;
		}
		t[2*i+0] = sign * (fv + 0.5);
		t[2*i+1] = den;
	}
	status = TIFFWriteData(tif, dir, (char *)t);
	_TIFFfree((char*) t);
	return (status);
}

static int
TIFFWriteFloatArray(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, float* v)
{
	dir->tdir_tag = tag;
	dir->tdir_type = (short) type;
	dir->tdir_count = n;
	TIFFCvtNativeToIEEEFloat(tif, n, v);
	if (n == 1) {
		dir->tdir_offset = *(uint32*) &v[0];
		return (1);
	} else
		return (TIFFWriteData(tif, dir, (char*) v));
}

static int
TIFFWriteDoubleArray(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
{
	dir->tdir_tag = tag;
	dir->tdir_type = (short) type;
	dir->tdir_count = n;
	TIFFCvtNativeToIEEEDouble(tif, n, v);
	return (TIFFWriteData(tif, dir, (char*) v));
}

/*
 * Write an array of ``type'' values for a specified tag (i.e. this is a tag
 * which is allowed to have different types, e.g. SMaxSampleType).
 * Internally the data values are represented as double since a double can
 * hold any of the TIFF tag types (yes, this should really be an abstract
 * type tany_t for portability).  The data is converted into the specified
 * type in a temporary buffer and then handed off to the appropriate array
 * writer.
 */
static int
TIFFWriteAnyArray(TIFF* tif,
    TIFFDataType type, ttag_t tag, TIFFDirEntry* dir, uint32 n, double* v)
{
	char buf[10 * sizeof(double)];
	char* w = buf;
	int i, status = 0;

	if (n * TIFFDataWidth(type) > sizeof buf)
		w = (char*) _TIFFmalloc(n * TIFFDataWidth(type));
	switch (type) {
	case TIFF_BYTE:
		{ unsigned char* bp = (unsigned char*) w;
		  for (i = 0; i < n; i++)
			bp[i] = (unsigned char) v[i];
		  dir->tdir_tag = tag;
		  dir->tdir_type = (short) type;
		  dir->tdir_count = n;
		  if (!TIFFWriteByteArray(tif, dir, (char*) bp))
			goto out;
		}
		break;
	case TIFF_SBYTE:
		{ signed char* bp = (signed char*) w;
		  for (i = 0; i < n; i++)
			bp[i] = (signed char) v[i];
		  dir->tdir_tag = tag;
		  dir->tdir_type = (short) type;
		  dir->tdir_count = n;
		  if (!TIFFWriteByteArray(tif, dir, (char*) bp))
			goto out;
		}
		break;
	case TIFF_SHORT:
		{ uint16* bp = (uint16*) w;
		  for (i = 0; i < n; i++)
			bp[i] = (uint16) v[i];
		  if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
				goto out;
		}
		break;
	case TIFF_SSHORT:
		{ int16* bp = (int16*) w;
		  for (i = 0; i < n; i++)
			bp[i] = (int16) v[i];
		  if (!TIFFWriteShortArray(tif, type, tag, dir, n, (uint16*)bp))
			goto out;
		}
		break;
	case TIFF_LONG:
		{ uint32* bp = (uint32*) w;
		  for (i = 0; i < n; i++)
			bp[i] = (uint32) v[i];
		  if (!TIFFWriteLongArray(tif, type, tag, dir, n, bp))
			goto out;
		}
		break;
	case TIFF_SLONG:
		{ int32* bp = (int32*) w;
		  for (i = 0; i < n; i++)
			bp[i] = (int32) v[i];
		  if (!TIFFWriteLongArray(tif, type, tag, dir, n, (uint32*) bp))
			goto out;
		}
		break;
	case TIFF_FLOAT:
		{ float* bp = (float*) w;
		  for (i = 0; i < n; i++)
			bp[i] = (float) v[i];
		  if (!TIFFWriteFloatArray(tif, type, tag, dir, n, bp))
			goto out;
		}
		break;
	case TIFF_DOUBLE:
		return (TIFFWriteDoubleArray(tif, type, tag, dir, n, v));
	default:
		/* TIFF_NOTYPE */
		/* TIFF_ASCII */
		/* TIFF_UNDEFINED */
		/* TIFF_RATIONAL */
		/* TIFF_SRATIONAL */
		goto out;
	}
	status = 1;
 out:
	if (w != buf)
		_TIFFfree(w);
	return (status);
}

#ifdef COLORIMETRY_SUPPORT
static int
TIFFWriteTransferFunction(TIFF* tif, TIFFDirEntry* dir)
{
	TIFFDirectory* td = &tif->tif_dir;
	tsize_t n = (1L<<td->td_bitspersample) * sizeof (uint16);
	uint16** tf = td->td_transferfunction;
	int ncols;

	/*
	 * Check if the table can be written as a single column,
	 * or if it must be written as 3 columns.  Note that we
	 * write a 3-column tag if there are 2 samples/pixel and
	 * a single column of data won't suffice--hmm.
	 */
	switch (td->td_samplesperpixel - td->td_extrasamples) {
	default:	if (_TIFFmemcmp(tf[0], tf[2], n)) { ncols = 3; break; }
	case 2:		if (_TIFFmemcmp(tf[0], tf[1], n)) { ncols = 3; break; }
	case 1: case 0:	ncols = 1;
	}
	return (TIFFWriteShortTable(tif,
	    TIFFTAG_TRANSFERFUNCTION, dir, ncols, tf));
}
#endif

/*
 * Write a contiguous directory item.
 */
static int
TIFFWriteData(TIFF* tif, TIFFDirEntry* dir, char* cp)
{
	tsize_t cc;

	if (tif->tif_flags & TIFF_SWAB) {
		switch (dir->tdir_type) {
		case TIFF_SHORT:
		case TIFF_SSHORT:
			TIFFSwabArrayOfShort((uint16*) cp, dir->tdir_count);
			break;
		case TIFF_LONG:
		case TIFF_SLONG:
		case TIFF_FLOAT:
			TIFFSwabArrayOfLong((uint32*) cp, dir->tdir_count);
			break;
		case TIFF_RATIONAL:
		case TIFF_SRATIONAL:
			TIFFSwabArrayOfLong((uint32*) cp, 2*dir->tdir_count);
			break;
		case TIFF_DOUBLE:
			TIFFSwabArrayOfDouble((double*) cp, dir->tdir_count);
			break;
		}
	}
	dir->tdir_offset = tif->tif_dataoff;
	cc = dir->tdir_count * TIFFDataWidth(dir->tdir_type);
	if (SeekOK(tif, dir->tdir_offset) &&
	    WriteOK(tif, cp, cc)) {
		tif->tif_dataoff += (cc + 1) & ~1;
		return (1);
	}
	TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing data for field \"%s\"",
	    _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
	return (0);
}

/*
 * Link the current directory into the
 * directory chain for the file.
 */
static int
TIFFLinkDirectory(TIFF* tif)
{
	static const char module[] = "TIFFLinkDirectory";
	uint32 nextdir;
	uint32 diroff;

	tif->tif_diroff = (TIFFSeekFile(tif, (toff_t) 0, SEEK_END)+1) &~ 1;
	diroff = (uint32) tif->tif_diroff;
	if (tif->tif_flags & TIFF_SWAB)
		TIFFSwabLong(&diroff);
#if SUBIFD_SUPPORT
	if (tif->tif_flags & TIFF_INSUBIFD) {
		(void) TIFFSeekFile(tif, tif->tif_subifdoff, SEEK_SET);
		if (!WriteOK(tif, &diroff, sizeof (diroff))) {
			TIFFErrorExt(tif->tif_clientdata, module,
			    "%s: Error writing SubIFD directory link",
			    tif->tif_name);
			return (0);
		}
		/*
		 * Advance to the next SubIFD or, if this is
		 * the last one configured, revert back to the
		 * normal directory linkage.
		 */
		if (--tif->tif_nsubifd)
			tif->tif_subifdoff += sizeof (diroff);
		else
			tif->tif_flags &= ~TIFF_INSUBIFD;
		return (1);
	}
#endif
	if (tif->tif_header.tiff_diroff == 0) {
		/*
		 * First directory, overwrite offset in header.
		 */
		tif->tif_header.tiff_diroff = (uint32) tif->tif_diroff;
#define	HDROFF(f)	((toff_t) &(((TIFFHeader*) 0)->f))
		(void) TIFFSeekFile(tif, HDROFF(tiff_diroff), SEEK_SET);
		if (!WriteOK(tif, &diroff, sizeof (diroff))) {
			TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Error writing TIFF header");
			return (0);
		}
		return (1);
	}
	/*
	 * Not the first directory, search to the last and append.
	 */
	nextdir = tif->tif_header.tiff_diroff;
	do {
		uint16 dircount;

		if (!SeekOK(tif, nextdir) ||
		    !ReadOK(tif, &dircount, sizeof (dircount))) {
			TIFFErrorExt(tif->tif_clientdata, module, "Error fetching directory count");
			return (0);
		}
		if (tif->tif_flags & TIFF_SWAB)
			TIFFSwabShort(&dircount);
		(void) TIFFSeekFile(tif,
		    dircount * sizeof (TIFFDirEntry), SEEK_CUR);
		if (!ReadOK(tif, &nextdir, sizeof (nextdir))) {
			TIFFErrorExt(tif->tif_clientdata, module, "Error fetching directory link");
			return (0);
		}
		if (tif->tif_flags & TIFF_SWAB)
			TIFFSwabLong(&nextdir);
	} while (nextdir != 0);
	(void) TIFFSeekFile(tif, -(toff_t) sizeof (nextdir), SEEK_CUR);
	if (!WriteOK(tif, &diroff, sizeof (diroff))) {
		TIFFErrorExt(tif->tif_clientdata, module, "Error writing directory link");
		return (0);
	}
	return (1);
}
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 8
 * fill-column: 78
 * End:
 */