remove unused sources

1 files changed, 0 insertions, 2081 deletions

diff --git a/tiff/libtiff/tif_dirread.c b/tiff/libtiff/tif_dirread.c
deleted file mode 100644
index 907b531..0000000
--- a/tiff/libtiff/tif_dirread.c
+++ /dev/null
@@ -1,2081 +0,0 @@
-/* $Id: tif_dirread.c,v 1.92.2.9 2010-06-14 00:21:46 fwarmerdam Exp $ */
-
-/*
- * 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.
- *
- * Directory Read Support Routines.
- */
-#include "tiffiop.h"
-
-#define	IGNORE	0		/* tag placeholder used below */
-
-#ifdef HAVE_IEEEFP
-# define	TIFFCvtIEEEFloatToNative(tif, n, fp)
-# define	TIFFCvtIEEEDoubleToNative(tif, n, dp)
-#else
-extern	void TIFFCvtIEEEFloatToNative(TIFF*, uint32, float*);
-extern	void TIFFCvtIEEEDoubleToNative(TIFF*, uint32, double*);
-#endif
-
-static  TIFFDirEntry* TIFFReadDirectoryFind(TIFFDirEntry* dir,
-					    uint16 dircount, uint16 tagid);
-static	int EstimateStripByteCounts(TIFF*, TIFFDirEntry*, uint16);
-static	void MissingRequired(TIFF*, const char*);
-static	int TIFFCheckDirOffset(TIFF*, toff_t);
-static	int CheckDirCount(TIFF*, TIFFDirEntry*, uint32);
-static	uint16 TIFFFetchDirectory(TIFF*, toff_t, TIFFDirEntry**, toff_t *);
-static	tsize_t TIFFFetchData(TIFF*, TIFFDirEntry*, char*);
-static	tsize_t TIFFFetchString(TIFF*, TIFFDirEntry*, char*);
-static	float TIFFFetchRational(TIFF*, TIFFDirEntry*);
-static	int TIFFFetchNormalTag(TIFF*, TIFFDirEntry*);
-static	int TIFFFetchPerSampleShorts(TIFF*, TIFFDirEntry*, uint16*);
-static	int TIFFFetchPerSampleLongs(TIFF*, TIFFDirEntry*, uint32*);
-static	int TIFFFetchPerSampleAnys(TIFF*, TIFFDirEntry*, double*);
-static	int TIFFFetchShortArray(TIFF*, TIFFDirEntry*, uint16*);
-static	int TIFFFetchStripThing(TIFF*, TIFFDirEntry*, long, uint32**);
-static	int TIFFFetchRefBlackWhite(TIFF*, TIFFDirEntry*);
-static	int TIFFFetchSubjectDistance(TIFF*, TIFFDirEntry*);
-static	float TIFFFetchFloat(TIFF*, TIFFDirEntry*);
-static	int TIFFFetchFloatArray(TIFF*, TIFFDirEntry*, float*);
-static	int TIFFFetchDoubleArray(TIFF*, TIFFDirEntry*, double*);
-static	int TIFFFetchAnyArray(TIFF*, TIFFDirEntry*, double*);
-static	int TIFFFetchShortPair(TIFF*, TIFFDirEntry*);
-static	void ChopUpSingleUncompressedStrip(TIFF*);
-
-/*
- * Read the next TIFF directory from a file and convert it to the internal
- * format. We read directories sequentially.
- */
-int
-TIFFReadDirectory(TIFF* tif)
-{
-	static const char module[] = "TIFFReadDirectory";
-
-	int n;
-	TIFFDirectory* td;
-	TIFFDirEntry *dp, *dir = NULL;
-	uint16 iv;
-	uint32 v;
-	const TIFFFieldInfo* fip;
-	size_t fix;
-	uint16 dircount;
-	int diroutoforderwarning = 0, compressionknown = 0;
-	int haveunknowntags = 0;
-
-	tif->tif_diroff = tif->tif_nextdiroff;
-	/*
-	 * Check whether we have the last offset or bad offset (IFD looping).
-	 */
-	if (!TIFFCheckDirOffset(tif, tif->tif_nextdiroff))
-		return 0;
-	/*
-	 * Cleanup any previous compression state.
-	 */
-	(*tif->tif_cleanup)(tif);
-	tif->tif_curdir++;
-	dircount = TIFFFetchDirectory(tif, tif->tif_nextdiroff,
-				      &dir, &tif->tif_nextdiroff);
-	if (!dircount) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-			     "%s: Failed to read directory at offset %u",
-			     tif->tif_name, tif->tif_nextdiroff);
-		return 0;
-	}
-
-	tif->tif_flags &= ~TIFF_BEENWRITING;	/* reset before new dir */
-	/*
-	 * Setup default value and then make a pass over
-	 * the fields to check type and tag information,
-	 * and to extract info required to size data
-	 * structures.  A second pass is made afterwards
-	 * to read in everthing not taken in the first pass.
-	 */
-	td = &tif->tif_dir;
-	/* free any old stuff and reinit */
-	TIFFFreeDirectory(tif);
-	TIFFDefaultDirectory(tif);
-	/*
-	 * Electronic Arts writes gray-scale TIFF files
-	 * without a PlanarConfiguration directory entry.
-	 * Thus we setup a default value here, even though
-	 * the TIFF spec says there is no default value.
-	 */
-	TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
-
-	/*
-	 * Sigh, we must make a separate pass through the
-	 * directory for the following reason:
-	 *
-	 * We must process the Compression tag in the first pass
-	 * in order to merge in codec-private tag definitions (otherwise
-	 * we may get complaints about unknown tags).  However, the
-	 * Compression tag may be dependent on the SamplesPerPixel
-	 * tag value because older TIFF specs permited Compression
-	 * to be written as a SamplesPerPixel-count tag entry.
-	 * Thus if we don't first figure out the correct SamplesPerPixel
-	 * tag value then we may end up ignoring the Compression tag
-	 * value because it has an incorrect count value (if the
-	 * true value of SamplesPerPixel is not 1).
-	 *
-	 * It sure would have been nice if Aldus had really thought
-	 * this stuff through carefully.
-	 */
-	for (dp = dir, n = dircount; n > 0; n--, dp++) {
-		if (tif->tif_flags & TIFF_SWAB) {
-			TIFFSwabArrayOfShort(&dp->tdir_tag, 2);
-			TIFFSwabArrayOfLong(&dp->tdir_count, 2);
-		}
-		if (dp->tdir_tag == TIFFTAG_SAMPLESPERPIXEL) {
-			if (!TIFFFetchNormalTag(tif, dp))
-				goto bad;
-			dp->tdir_tag = IGNORE;
-		}
-	}
-	/*
-	 * First real pass over the directory.
-	 */
-	fix = 0;
-	for (dp = dir, n = dircount; n > 0; n--, dp++) {
-
-		if (dp->tdir_tag == IGNORE)
-			continue;
-		if (fix >= tif->tif_nfields)
-			fix = 0;
-
-		/*
-		 * Silicon Beach (at least) writes unordered
-		 * directory tags (violating the spec).  Handle
-		 * it here, but be obnoxious (maybe they'll fix it?).
-		 */
-		if (dp->tdir_tag < tif->tif_fieldinfo[fix]->field_tag) {
-			if (!diroutoforderwarning) {
-				TIFFWarningExt(tif->tif_clientdata, module,
-	"%s: invalid TIFF directory; tags are not sorted in ascending order",
-					    tif->tif_name);
-				diroutoforderwarning = 1;
-			}
-			fix = 0;			/* O(n^2) */
-		}
-		while (fix < tif->tif_nfields &&
-		    tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag)
-			fix++;
-		if (fix >= tif->tif_nfields ||
-		    tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) {
-			/* Unknown tag ... we'll deal with it below */
-			haveunknowntags = 1;
-			continue;
-		}
-		/*
-		 * Null out old tags that we ignore.
-		 */
-		if (tif->tif_fieldinfo[fix]->field_bit == FIELD_IGNORE) {
-	ignore:
-			dp->tdir_tag = IGNORE;
-			continue;
-		}
-		/*
-		 * Check data type.
-		 */
-		fip = tif->tif_fieldinfo[fix];
-		while (dp->tdir_type != (unsigned short) fip->field_type
-		    && fix < tif->tif_nfields) {
-			if (fip->field_type == TIFF_ANY)	/* wildcard */
-				break;
-			fip = tif->tif_fieldinfo[++fix];
-			if (fix >= tif->tif_nfields ||
-			    fip->field_tag != dp->tdir_tag) {
-				TIFFWarningExt(tif->tif_clientdata, module,
-			"%s: wrong data type %d for \"%s\"; tag ignored",
-					    tif->tif_name, dp->tdir_type,
-					    tif->tif_fieldinfo[fix-1]->field_name);
-				goto ignore;
-			}
-		}
-		/*
-		 * Check count if known in advance.
-		 */
-		if (fip->field_readcount != TIFF_VARIABLE
-		    && fip->field_readcount != TIFF_VARIABLE2) {
-			uint32 expected = (fip->field_readcount == TIFF_SPP) ?
-			    (uint32) td->td_samplesperpixel :
-			    (uint32) fip->field_readcount;
-			if (!CheckDirCount(tif, dp, expected))
-				goto ignore;
-		}
-
-		switch (dp->tdir_tag) {
-		case TIFFTAG_COMPRESSION:
-			/*
-			 * The 5.0 spec says the Compression tag has
-			 * one value, while earlier specs say it has
-			 * one value per sample.  Because of this, we
-			 * accept the tag if one value is supplied.
-			 */
-			if (dp->tdir_count == 1) {
-				v = TIFFExtractData(tif,
-				    dp->tdir_type, dp->tdir_offset);
-				if (!TIFFSetField(tif, dp->tdir_tag, (uint16)v))
-					goto bad;
-				else
-					compressionknown = 1;
-				break;
-			/* XXX: workaround for broken TIFFs */
-			} else if (dp->tdir_type == TIFF_LONG) {
-				if (!TIFFFetchPerSampleLongs(tif, dp, &v) ||
-				    !TIFFSetField(tif, dp->tdir_tag, (uint16)v))
-					goto bad;
-			} else {
-				if (!TIFFFetchPerSampleShorts(tif, dp, &iv)
-				    || !TIFFSetField(tif, dp->tdir_tag, iv))
-					goto bad;
-			}
-			dp->tdir_tag = IGNORE;
-			break;
-		case TIFFTAG_STRIPOFFSETS:
-		case TIFFTAG_STRIPBYTECOUNTS:
-		case TIFFTAG_TILEOFFSETS:
-		case TIFFTAG_TILEBYTECOUNTS:
-			TIFFSetFieldBit(tif, fip->field_bit);
-			break;
-		case TIFFTAG_IMAGEWIDTH:
-		case TIFFTAG_IMAGELENGTH:
-		case TIFFTAG_IMAGEDEPTH:
-		case TIFFTAG_TILELENGTH:
-		case TIFFTAG_TILEWIDTH:
-		case TIFFTAG_TILEDEPTH:
-		case TIFFTAG_PLANARCONFIG:
-		case TIFFTAG_ROWSPERSTRIP:
-		case TIFFTAG_EXTRASAMPLES:
-			if (!TIFFFetchNormalTag(tif, dp))
-				goto bad;
-			dp->tdir_tag = IGNORE;
-			break;
-		}
-	}
-
-	/*
-	 * If we saw any unknown tags, make an extra pass over the directory
-	 * to deal with them.  This must be done separately because the tags
-	 * could have become known when we registered a codec after finding
-	 * the Compression tag.  In a correctly-sorted directory there's
-	 * no problem because Compression will come before any codec-private
-	 * tags, but if the sorting is wrong that might not hold.
-	 */
-	if (haveunknowntags) {
-	    fix = 0;
-	    for (dp = dir, n = dircount; n > 0; n--, dp++) {
-		if (dp->tdir_tag == IGNORE)
-			continue;
-		if (fix >= tif->tif_nfields ||
-		    dp->tdir_tag < tif->tif_fieldinfo[fix]->field_tag)
-			fix = 0;			/* O(n^2) */
-		while (fix < tif->tif_nfields &&
-		    tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag)
-			fix++;
-		if (fix >= tif->tif_nfields ||
-		    tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) {
-
-					TIFFWarningExt(tif->tif_clientdata,
-						       module,
-                        "%s: unknown field with tag %d (0x%x) encountered",
-						       tif->tif_name,
-						       dp->tdir_tag,
-						       dp->tdir_tag);
-
-					if (!_TIFFMergeFieldInfo(tif,
-						_TIFFCreateAnonFieldInfo(tif,
-						dp->tdir_tag,
-						(TIFFDataType) dp->tdir_type),
-						1))
-					{
-					TIFFWarningExt(tif->tif_clientdata,
-						       module,
-			"Registering anonymous field with tag %d (0x%x) failed",
-						       dp->tdir_tag,
-						       dp->tdir_tag);
-					dp->tdir_tag = IGNORE;
-					continue;
-					}
-			fix = 0;
-			while (fix < tif->tif_nfields &&
-			       tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag)
-				fix++;
-		}
-		/*
-		 * Check data type.
-		 */
-		fip = tif->tif_fieldinfo[fix];
-		while (dp->tdir_type != (unsigned short) fip->field_type
-		    && fix < tif->tif_nfields) {
-			if (fip->field_type == TIFF_ANY)	/* wildcard */
-				break;
-			fip = tif->tif_fieldinfo[++fix];
-			if (fix >= tif->tif_nfields ||
-			    fip->field_tag != dp->tdir_tag) {
-				TIFFWarningExt(tif->tif_clientdata, module,
-			"%s: wrong data type %d for \"%s\"; tag ignored",
-					    tif->tif_name, dp->tdir_type,
-					    tif->tif_fieldinfo[fix-1]->field_name);
-				dp->tdir_tag = IGNORE;
-				break;
-			}
-		}
-	    }
-	}
-
-	/*
-	 * XXX: OJPEG hack.
-	 * If a) compression is OJPEG, b) planarconfig tag says it's separate,
-	 * c) strip offsets/bytecounts tag are both present and
-	 * d) both contain exactly one value, then we consistently find
-	 * that the buggy implementation of the buggy compression scheme
-	 * matches contig planarconfig best. So we 'fix-up' the tag here
-	 */
-	if ((td->td_compression==COMPRESSION_OJPEG) &&
-	    (td->td_planarconfig==PLANARCONFIG_SEPARATE)) {
-		dp = TIFFReadDirectoryFind(dir,dircount,TIFFTAG_STRIPOFFSETS);
-		if ((dp!=0) && (dp->tdir_count==1)) {
-			dp = TIFFReadDirectoryFind(dir, dircount,
-						   TIFFTAG_STRIPBYTECOUNTS);
-			if ((dp!=0) && (dp->tdir_count==1)) {
-				td->td_planarconfig=PLANARCONFIG_CONTIG;
-				TIFFWarningExt(tif->tif_clientdata,
-					       "TIFFReadDirectory",
-				"Planarconfig tag value assumed incorrect, "
-				"assuming data is contig instead of chunky");
-			}
-		}
-	}
-
-	/*
-	 * Allocate directory structure and setup defaults.
-	 */
-	if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS)) {
-		MissingRequired(tif, "ImageLength");
-		goto bad;
-	}
-	/* 
-	 * Setup appropriate structures (by strip or by tile)
-	 */
-	if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) {
-		td->td_nstrips = TIFFNumberOfStrips(tif);
-		td->td_tilewidth = td->td_imagewidth;
-		td->td_tilelength = td->td_rowsperstrip;
-		td->td_tiledepth = td->td_imagedepth;
-		tif->tif_flags &= ~TIFF_ISTILED;
-	} else {
-		td->td_nstrips = TIFFNumberOfTiles(tif);
-		tif->tif_flags |= TIFF_ISTILED;
-	}
-	if (!td->td_nstrips) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-			     "%s: cannot handle zero number of %s",
-			     tif->tif_name, isTiled(tif) ? "tiles" : "strips");
-		goto bad;
-	}
-	td->td_stripsperimage = td->td_nstrips;
-	if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
-		td->td_stripsperimage /= td->td_samplesperpixel;
-	if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) {
-		if ((td->td_compression==COMPRESSION_OJPEG) &&
-		    (isTiled(tif)==0) &&
-		    (td->td_nstrips==1)) {
-			/*
-			 * XXX: OJPEG hack.
-			 * If a) compression is OJPEG, b) it's not a tiled TIFF,
-			 * and c) the number of strips is 1,
-			 * then we tolerate the absence of stripoffsets tag,
-			 * because, presumably, all required data is in the
-			 * JpegInterchangeFormat stream.
-			 */
-			TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS);
-		} else {
-			MissingRequired(tif,
-				isTiled(tif) ? "TileOffsets" : "StripOffsets");
-			goto bad;
-		}
-	}
-
-	/*
-	 * Second pass: extract other information.
-	 */
-	for (dp = dir, n = dircount; n > 0; n--, dp++) {
-		if (dp->tdir_tag == IGNORE)
-			continue;
-		switch (dp->tdir_tag) {
-		case TIFFTAG_MINSAMPLEVALUE:
-		case TIFFTAG_MAXSAMPLEVALUE:
-		case TIFFTAG_BITSPERSAMPLE:
-		case TIFFTAG_DATATYPE:
-		case TIFFTAG_SAMPLEFORMAT:
-			/*
-			 * The 5.0 spec says the Compression tag has
-			 * one value, while earlier specs say it has
-			 * one value per sample.  Because of this, we
-			 * accept the tag if one value is supplied.
-			 *
-			 * The MinSampleValue, MaxSampleValue, BitsPerSample
-			 * DataType and SampleFormat tags are supposed to be
-			 * written as one value/sample, but some vendors
-			 * incorrectly write one value only -- so we accept
-			 * that as well (yech). Other vendors write correct
-			 * value for NumberOfSamples, but incorrect one for
-			 * BitsPerSample and friends, and we will read this
-			 * too.
-			 */
-			if (dp->tdir_count == 1) {
-				v = TIFFExtractData(tif,
-				    dp->tdir_type, dp->tdir_offset);
-				if (!TIFFSetField(tif, dp->tdir_tag, (uint16)v))
-					goto bad;
-			/* XXX: workaround for broken TIFFs */
-			} else if (dp->tdir_tag == TIFFTAG_BITSPERSAMPLE
-				   && dp->tdir_type == TIFF_LONG) {
-				if (!TIFFFetchPerSampleLongs(tif, dp, &v) ||
-				    !TIFFSetField(tif, dp->tdir_tag, (uint16)v))
-					goto bad;
-			} else {
-				if (!TIFFFetchPerSampleShorts(tif, dp, &iv) ||
-				    !TIFFSetField(tif, dp->tdir_tag, iv))
-					goto bad;
-			}
-			break;
-		case TIFFTAG_SMINSAMPLEVALUE:
-		case TIFFTAG_SMAXSAMPLEVALUE:
-			{
-				double dv = 0.0;
-				if (!TIFFFetchPerSampleAnys(tif, dp, &dv) ||
-				    !TIFFSetField(tif, dp->tdir_tag, dv))
-					goto bad;
-			}
-			break;
-		case TIFFTAG_STRIPOFFSETS:
-		case TIFFTAG_TILEOFFSETS:
-			if (!TIFFFetchStripThing(tif, dp,
-			    td->td_nstrips, &td->td_stripoffset))
-				goto bad;
-			break;
-		case TIFFTAG_STRIPBYTECOUNTS:
-		case TIFFTAG_TILEBYTECOUNTS:
-			if (!TIFFFetchStripThing(tif, dp,
-			    td->td_nstrips, &td->td_stripbytecount))
-				goto bad;
-			break;
-		case TIFFTAG_COLORMAP:
-		case TIFFTAG_TRANSFERFUNCTION:
-			{
-				char* cp;
-				/*
-				 * TransferFunction can have either 1x or 3x
-				 * data values; Colormap can have only 3x
-				 * items.
-				 */
-				v = 1L<<td->td_bitspersample;
-				if (dp->tdir_tag == TIFFTAG_COLORMAP ||
-				    dp->tdir_count != v) {
-					if (!CheckDirCount(tif, dp, 3 * v))
-						break;
-				}
-				v *= sizeof(uint16);
-				cp = (char *)_TIFFCheckMalloc(tif,
-							      dp->tdir_count,
-							      sizeof (uint16),
-					"to read \"TransferFunction\" tag");
-				if (cp != NULL) {
-					if (TIFFFetchData(tif, dp, cp)) {
-						/*
-						 * This deals with there being
-						 * only one array to apply to
-						 * all samples.
-						 */
-						uint32 c = 1L << td->td_bitspersample;
-						if (dp->tdir_count == c)
-							v = 0L;
-						TIFFSetField(tif, dp->tdir_tag,
-						    cp, cp+v, cp+2*v);
-					}
-					_TIFFfree(cp);
-				}
-				break;
-			}
-		case TIFFTAG_PAGENUMBER:
-		case TIFFTAG_HALFTONEHINTS:
-		case TIFFTAG_YCBCRSUBSAMPLING:
-		case TIFFTAG_DOTRANGE:
-			(void) TIFFFetchShortPair(tif, dp);
-			break;
-		case TIFFTAG_REFERENCEBLACKWHITE:
-			(void) TIFFFetchRefBlackWhite(tif, dp);
-			break;
-/* BEGIN REV 4.0 COMPATIBILITY */
-		case TIFFTAG_OSUBFILETYPE:
-			v = 0L;
-			switch (TIFFExtractData(tif, dp->tdir_type,
-			    dp->tdir_offset)) {
-			case OFILETYPE_REDUCEDIMAGE:
-				v = FILETYPE_REDUCEDIMAGE;
-				break;
-			case OFILETYPE_PAGE:
-				v = FILETYPE_PAGE;
-				break;
-			}
-			if (v)
-				TIFFSetField(tif, TIFFTAG_SUBFILETYPE, v);
-			break;
-/* END REV 4.0 COMPATIBILITY */
-		default:
-			(void) TIFFFetchNormalTag(tif, dp);
-			break;
-		}
-	}
-	/*
-	 * OJPEG hack:
-	 * - If a) compression is OJPEG, and b) photometric tag is missing,
-	 * then we consistently find that photometric should be YCbCr
-	 * - If a) compression is OJPEG, and b) photometric tag says it's RGB,
-	 * then we consistently find that the buggy implementation of the
-	 * buggy compression scheme matches photometric YCbCr instead.
-	 * - If a) compression is OJPEG, and b) bitspersample tag is missing,
-	 * then we consistently find bitspersample should be 8.
-	 * - If a) compression is OJPEG, b) samplesperpixel tag is missing,
-	 * and c) photometric is RGB or YCbCr, then we consistently find
-	 * samplesperpixel should be 3
-	 * - If a) compression is OJPEG, b) samplesperpixel tag is missing,
-	 * and c) photometric is MINISWHITE or MINISBLACK, then we consistently
-	 * find samplesperpixel should be 3
-	 */
-	if (td->td_compression==COMPRESSION_OJPEG)
-	{
-		if (!TIFFFieldSet(tif,FIELD_PHOTOMETRIC))
-		{
-			TIFFWarningExt(tif->tif_clientdata, "TIFFReadDirectory",
-			"Photometric tag is missing, assuming data is YCbCr");
-			if (!TIFFSetField(tif,TIFFTAG_PHOTOMETRIC,PHOTOMETRIC_YCBCR))
-				goto bad;
-		}
-		else if (td->td_photometric==PHOTOMETRIC_RGB)
-		{
-			td->td_photometric=PHOTOMETRIC_YCBCR;
-			TIFFWarningExt(tif->tif_clientdata, "TIFFReadDirectory",
-			"Photometric tag value assumed incorrect, "
-			"assuming data is YCbCr instead of RGB");
-		}
-		if (!TIFFFieldSet(tif,FIELD_BITSPERSAMPLE))
-		{
-			TIFFWarningExt(tif->tif_clientdata,"TIFFReadDirectory",
-		"BitsPerSample tag is missing, assuming 8 bits per sample");
-			if (!TIFFSetField(tif,TIFFTAG_BITSPERSAMPLE,8))
-				goto bad;
-		}
-		if (!TIFFFieldSet(tif,FIELD_SAMPLESPERPIXEL))
-		{
-			if ((td->td_photometric==PHOTOMETRIC_RGB)
-			    || (td->td_photometric==PHOTOMETRIC_YCBCR))
-			{
-				TIFFWarningExt(tif->tif_clientdata,
-					       "TIFFReadDirectory",
-				"SamplesPerPixel tag is missing, "
-				"assuming correct SamplesPerPixel value is 3");
-				if (!TIFFSetField(tif,TIFFTAG_SAMPLESPERPIXEL,3))
-					goto bad;
-			}
-			else if ((td->td_photometric==PHOTOMETRIC_MINISWHITE)
-				 || (td->td_photometric==PHOTOMETRIC_MINISBLACK))
-			{
-				TIFFWarningExt(tif->tif_clientdata,
-					       "TIFFReadDirectory",
-				"SamplesPerPixel tag is missing, "
-				"assuming correct SamplesPerPixel value is 1");
-				if (!TIFFSetField(tif,TIFFTAG_SAMPLESPERPIXEL,1))
-					goto bad;
-			}
-		}
-	}
-	/*
-	 * Verify Palette image has a Colormap.
-	 */
-	if (td->td_photometric == PHOTOMETRIC_PALETTE &&
-	    !TIFFFieldSet(tif, FIELD_COLORMAP)) {
-		MissingRequired(tif, "Colormap");
-		goto bad;
-	}
-	/*
-	 * OJPEG hack:
-	 * We do no further messing with strip/tile offsets/bytecounts in OJPEG
-	 * TIFFs
-	 */
-	if (td->td_compression!=COMPRESSION_OJPEG)
-	{
-		/*
-		 * Attempt to deal with a missing StripByteCounts tag.
-		 */
-		if (!TIFFFieldSet(tif, FIELD_STRIPBYTECOUNTS)) {
-			/*
-			 * Some manufacturers violate the spec by not giving
-			 * the size of the strips.  In this case, assume there
-			 * is one uncompressed strip of data.
-			 */
-			if ((td->td_planarconfig == PLANARCONFIG_CONTIG &&
-			    td->td_nstrips > 1) ||
-			    (td->td_planarconfig == PLANARCONFIG_SEPARATE &&
-			     td->td_nstrips != td->td_samplesperpixel)) {
-			    MissingRequired(tif, "StripByteCounts");
-			    goto bad;
-			}
-			TIFFWarningExt(tif->tif_clientdata, module,
-				"%s: TIFF directory is missing required "
-				"\"%s\" field, calculating from imagelength",
-				tif->tif_name,
-				_TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name);
-			if (EstimateStripByteCounts(tif, dir, dircount) < 0)
-			    goto bad;
-		/*
-		 * Assume we have wrong StripByteCount value (in case
-		 * of single strip) in following cases:
-		 *   - it is equal to zero along with StripOffset;
-		 *   - it is larger than file itself (in case of uncompressed
-		 *     image);
-		 *   - it is smaller than the size of the bytes per row
-		 *     multiplied on the number of rows.  The last case should
-		 *     not be checked in the case of writing new image,
-		 *     because we may do not know the exact strip size
-		 *     until the whole image will be written and directory
-		 *     dumped out.
-		 */
-		#define	BYTECOUNTLOOKSBAD \
-		    ( (td->td_stripbytecount[0] == 0 && td->td_stripoffset[0] != 0) || \
-		      (td->td_compression == COMPRESSION_NONE && \
-		       td->td_stripbytecount[0] > TIFFGetFileSize(tif) - td->td_stripoffset[0]) || \
-		      (tif->tif_mode == O_RDONLY && \
-		       td->td_compression == COMPRESSION_NONE && \
-		       td->td_stripbytecount[0] < TIFFScanlineSize(tif) * td->td_imagelength) )
-
-		} else if (td->td_nstrips == 1
-			   && td->td_stripoffset[0] != 0
-			   && BYTECOUNTLOOKSBAD) {
-			/*
-			 * XXX: Plexus (and others) sometimes give a value of
-			 * zero for a tag when they don't know what the
-			 * correct value is!  Try and handle the simple case
-			 * of estimating the size of a one strip image.
-			 */
-			TIFFWarningExt(tif->tif_clientdata, module,
-	"%s: Bogus \"%s\" field, ignoring and calculating from imagelength",
-				    tif->tif_name,
-				    _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name);
-			if(EstimateStripByteCounts(tif, dir, dircount) < 0)
-			    goto bad;
-		} else if (td->td_planarconfig == PLANARCONFIG_CONTIG
-			   && td->td_nstrips > 2
-			   && td->td_compression == COMPRESSION_NONE
-			   && td->td_stripbytecount[0] != td->td_stripbytecount[1]
-                           && td->td_stripbytecount[0] != 0 
-                           && td->td_stripbytecount[1] != 0 ) {
-			/*
-			 * XXX: Some vendors fill StripByteCount array with 
-                         * absolutely wrong values (it can be equal to 
-                         * StripOffset array, for example). Catch this case 
-                         * here.
-			 */
-			TIFFWarningExt(tif->tif_clientdata, module,
-	"%s: Wrong \"%s\" field, ignoring and calculating from imagelength",
-				    tif->tif_name,
-				    _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name);
-			if (EstimateStripByteCounts(tif, dir, dircount) < 0)
-			    goto bad;
-		}
-	}
-	if (dir) {
-		_TIFFfree((char *)dir);
-		dir = NULL;
-	}
-	if (!TIFFFieldSet(tif, FIELD_MAXSAMPLEVALUE))
-		td->td_maxsamplevalue = (uint16)((1L<<td->td_bitspersample)-1);
-	/*
-	 * Setup default compression scheme.
-	 */
-
-	/*
-	 * XXX: We can optimize checking for the strip bounds using the sorted
-	 * bytecounts array. See also comments for TIFFAppendToStrip()
-	 * function in tif_write.c.
-	 */
-	if (td->td_nstrips > 1) {
-		tstrip_t strip;
-
-		td->td_stripbytecountsorted = 1;
-		for (strip = 1; strip < td->td_nstrips; strip++) {
-			if (td->td_stripoffset[strip - 1] >
-			    td->td_stripoffset[strip]) {
-				td->td_stripbytecountsorted = 0;
-				break;
-			}
-		}
-	}
-
-	if (!TIFFFieldSet(tif, FIELD_COMPRESSION))
-		TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
-	/*
-	 * Some manufacturers make life difficult by writing
-	 * large amounts of uncompressed data as a single strip.
-	 * This is contrary to the recommendations of the spec.
-	 * The following makes an attempt at breaking such images
-	 * into strips closer to the recommended 8k bytes.  A
-	 * side effect, however, is that the RowsPerStrip tag
-	 * value may be changed.
-	 */
-	if (td->td_nstrips == 1 && td->td_compression == COMPRESSION_NONE &&
-	    (tif->tif_flags & (TIFF_STRIPCHOP|TIFF_ISTILED)) == TIFF_STRIPCHOP)
-		ChopUpSingleUncompressedStrip(tif);
-
-	/*
-	 * Reinitialize i/o since we are starting on a new directory.
-	 */
-	tif->tif_row = (uint32) -1;
-	tif->tif_curstrip = (tstrip_t) -1;
-	tif->tif_col = (uint32) -1;
-	tif->tif_curtile = (ttile_t) -1;
-	tif->tif_tilesize = (tsize_t) -1;
-
-	tif->tif_scanlinesize = TIFFScanlineSize(tif);
-	if (!tif->tif_scanlinesize) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-			     "%s: cannot handle zero scanline size",
-			     tif->tif_name);
-		return (0);
-	}
-
-	if (isTiled(tif)) {
-		tif->tif_tilesize = TIFFTileSize(tif);
-		if (!tif->tif_tilesize) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-				     "%s: cannot handle zero tile size",
-				     tif->tif_name);
-			return (0);
-		}
-	} else {
-		if (!TIFFStripSize(tif)) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-				     "%s: cannot handle zero strip size",
-				     tif->tif_name);
-			return (0);
-		}
-	}
-	return (1);
-bad:
-	if (dir)
-		_TIFFfree(dir);
-	return (0);
-}
-
-static TIFFDirEntry*
-TIFFReadDirectoryFind(TIFFDirEntry* dir, uint16 dircount, uint16 tagid)
-{
-	TIFFDirEntry* m;
-	uint16 n;
-	for (m=dir, n=0; n<dircount; m++, n++)
-	{
-		if (m->tdir_tag==tagid)
-			return(m);
-	}
-	return(0);
-}
-
-/*
- * Read custom directory from the arbitarry offset.
- * The code is very similar to TIFFReadDirectory().
- */
-int
-TIFFReadCustomDirectory(TIFF* tif, toff_t diroff,
-			const TIFFFieldInfo info[], size_t n)
-{
-	static const char module[] = "TIFFReadCustomDirectory";
-
-	TIFFDirectory* td = &tif->tif_dir;
-	TIFFDirEntry *dp, *dir = NULL;
-	const TIFFFieldInfo* fip;
-	size_t fix;
-	uint16 i, dircount;
-
-	_TIFFSetupFieldInfo(tif, info, n);
-
-	dircount = TIFFFetchDirectory(tif, diroff, &dir, NULL);
-	if (!dircount) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-			"%s: Failed to read custom directory at offset %u",
-			     tif->tif_name, diroff);
-		return 0;
-	}
-
-	TIFFFreeDirectory(tif);
-        _TIFFmemset(&tif->tif_dir, 0, sizeof(TIFFDirectory));
-
-	fix = 0;
-	for (dp = dir, i = dircount; i > 0; i--, dp++) {
-		if (tif->tif_flags & TIFF_SWAB) {
-			TIFFSwabArrayOfShort(&dp->tdir_tag, 2);
-			TIFFSwabArrayOfLong(&dp->tdir_count, 2);
-		}
-
-		if (fix >= tif->tif_nfields || dp->tdir_tag == IGNORE)
-			continue;
-
-		while (fix < tif->tif_nfields &&
-		       tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag)
-			fix++;
-
-		if (fix >= tif->tif_nfields ||
-		    tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) {
-
-			TIFFWarningExt(tif->tif_clientdata, module,
-                        "%s: unknown field with tag %d (0x%x) encountered",
-				    tif->tif_name, dp->tdir_tag, dp->tdir_tag);
-			if (!_TIFFMergeFieldInfo(tif,
-						 _TIFFCreateAnonFieldInfo(tif,
-						 dp->tdir_tag,
-						 (TIFFDataType) dp->tdir_type),
-						 1))
-			{
-				TIFFWarningExt(tif->tif_clientdata, module,
-			"Registering anonymous field with tag %d (0x%x) failed",
-						dp->tdir_tag, dp->tdir_tag);
-				goto ignore;
-			}
-
-			fix = 0;
-			while (fix < tif->tif_nfields &&
-			       tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag)
-				fix++;
-		}
-		/*
-		 * Null out old tags that we ignore.
-		 */
-		if (tif->tif_fieldinfo[fix]->field_bit == FIELD_IGNORE) {
-	ignore:
-			dp->tdir_tag = IGNORE;
-			continue;
-		}
-		/*
-		 * Check data type.
-		 */
-		fip = tif->tif_fieldinfo[fix];
-		while (dp->tdir_type != (unsigned short) fip->field_type
-                       && fix < tif->tif_nfields) {
-			if (fip->field_type == TIFF_ANY)	/* wildcard */
-				break;
-                        fip = tif->tif_fieldinfo[++fix];
-			if (fix >= tif->tif_nfields ||
-			    fip->field_tag != dp->tdir_tag) {
-				TIFFWarningExt(tif->tif_clientdata, module,
-			"%s: wrong data type %d for \"%s\"; tag ignored",
-					    tif->tif_name, dp->tdir_type,
-					    tif->tif_fieldinfo[fix-1]->field_name);
-				goto ignore;
-			}
-		}
-		/*
-		 * Check count if known in advance.
-		 */
-		if (fip->field_readcount != TIFF_VARIABLE
-		    && fip->field_readcount != TIFF_VARIABLE2) {
-			uint32 expected = (fip->field_readcount == TIFF_SPP) ?
-			    (uint32) td->td_samplesperpixel :
-			    (uint32) fip->field_readcount;
-			if (!CheckDirCount(tif, dp, expected))
-				goto ignore;
-		}
-
-		/*
-		 * EXIF tags which need to be specifically processed.
-		 */
-		switch (dp->tdir_tag) {
-			case EXIFTAG_SUBJECTDISTANCE:
-				(void) TIFFFetchSubjectDistance(tif, dp);
-				break;
-			default:
-				(void) TIFFFetchNormalTag(tif, dp);
-				break;
-		}
-	}
-	
-	if (dir)
-		_TIFFfree(dir);
-	return 1;
-}
-
-/*
- * EXIF is important special case of custom IFD, so we have a special
- * function to read it.
- */
-int
-TIFFReadEXIFDirectory(TIFF* tif, toff_t diroff)
-{
-	size_t exifFieldInfoCount;
-	const TIFFFieldInfo *exifFieldInfo =
-		_TIFFGetExifFieldInfo(&exifFieldInfoCount);
-	return TIFFReadCustomDirectory(tif, diroff, exifFieldInfo,
-				       exifFieldInfoCount);
-}
-
-static int
-EstimateStripByteCounts(TIFF* tif, TIFFDirEntry* dir, uint16 dircount)
-{
-	static const char module[] = "EstimateStripByteCounts";
-
-	TIFFDirEntry *dp;
-	TIFFDirectory *td = &tif->tif_dir;
-	uint32 strip;
-
-	if (td->td_stripbytecount)
-		_TIFFfree(td->td_stripbytecount);
-	td->td_stripbytecount = (uint32*)
-	    _TIFFCheckMalloc(tif, td->td_nstrips, sizeof (uint32),
-		"for \"StripByteCounts\" array");
-        if( td->td_stripbytecount == NULL )
-            return -1;
-
-	if (td->td_compression != COMPRESSION_NONE) {
-		uint32 space = (uint32)(sizeof (TIFFHeader)
-		    + sizeof (uint16)
-		    + (dircount * sizeof (TIFFDirEntry))
-		    + sizeof (uint32));
-		toff_t filesize = TIFFGetFileSize(tif);
-		uint16 n;
-
-		/* calculate amount of space used by indirect values */
-		for (dp = dir, n = dircount; n > 0; n--, dp++)
-		{
-			uint32 cc = TIFFDataWidth((TIFFDataType) dp->tdir_type);
-			if (cc == 0) {
-				TIFFErrorExt(tif->tif_clientdata, module,
-			"%s: Cannot determine size of unknown tag type %d",
-					  tif->tif_name, dp->tdir_type);
-				return -1;
-			}
-			cc = cc * dp->tdir_count;
-			if (cc > sizeof (uint32))
-				space += cc;
-		}
-		space = filesize - space;
-		if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
-			space /= td->td_samplesperpixel;
-		for (strip = 0; strip < td->td_nstrips; strip++)
-			td->td_stripbytecount[strip] = space;
-		/*
-		 * This gross hack handles the case were the offset to
-		 * the last strip is past the place where we think the strip
-		 * should begin.  Since a strip of data must be contiguous,
-		 * it's safe to assume that we've overestimated the amount
-		 * of data in the strip and trim this number back accordingly.
-		 */ 
-		strip--;
-		if (((toff_t)(td->td_stripoffset[strip]+
-			      td->td_stripbytecount[strip])) > filesize)
-			td->td_stripbytecount[strip] =
-			    filesize - td->td_stripoffset[strip];
-	} else if (isTiled(tif)) {
-		uint32 bytespertile = TIFFTileSize(tif);
-
-		for (strip = 0; strip < td->td_nstrips; strip++)
-                    td->td_stripbytecount[strip] = bytespertile;
-	} else {
-		uint32 rowbytes = TIFFScanlineSize(tif);
-		uint32 rowsperstrip = td->td_imagelength/td->td_stripsperimage;
-		for (strip = 0; strip < td->td_nstrips; strip++)
-			td->td_stripbytecount[strip] = rowbytes * rowsperstrip;
-	}
-	TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS);
-	if (!TIFFFieldSet(tif, FIELD_ROWSPERSTRIP))
-		td->td_rowsperstrip = td->td_imagelength;
-	return 1;
-}
-
-static void
-MissingRequired(TIFF* tif, const char* tagname)
-{
-	static const char module[] = "MissingRequired";
-
-	TIFFErrorExt(tif->tif_clientdata, module,
-		  "%s: TIFF directory is missing required \"%s\" field",
-		  tif->tif_name, tagname);
-}
-
-/*
- * Check the directory offset against the list of already seen directory
- * offsets. This is a trick to prevent IFD looping. The one can create TIFF
- * file with looped directory pointers. We will maintain a list of already
- * seen directories and check every IFD offset against that list.
- */
-static int
-TIFFCheckDirOffset(TIFF* tif, toff_t diroff)
-{
-	uint16 n;
-
-	if (diroff == 0)			/* no more directories */
-		return 0;
-
-	for (n = 0; n < tif->tif_dirnumber && tif->tif_dirlist; n++) {
-		if (tif->tif_dirlist[n] == diroff)
-			return 0;
-	}
-
-	tif->tif_dirnumber++;
-
-	if (tif->tif_dirnumber > tif->tif_dirlistsize) {
-		toff_t* new_dirlist;
-
-		/*
-		 * XXX: Reduce memory allocation granularity of the dirlist
-		 * array.
-		 */
-		new_dirlist = (toff_t *)_TIFFCheckRealloc(tif,
-							  tif->tif_dirlist,
-							  tif->tif_dirnumber,
-							  2 * sizeof(toff_t),
-							  "for IFD list");
-		if (!new_dirlist)
-			return 0;
-		tif->tif_dirlistsize = 2 * tif->tif_dirnumber;
-		tif->tif_dirlist = new_dirlist;
-	}
-
-	tif->tif_dirlist[tif->tif_dirnumber - 1] = diroff;
-
-	return 1;
-}
-
-/*
- * Check the count field of a directory entry against a known value.  The
- * caller is expected to skip/ignore the tag if there is a mismatch.
- */
-static int
-CheckDirCount(TIFF* tif, TIFFDirEntry* dir, uint32 count)
-{
-	if (count > dir->tdir_count) {
-		TIFFWarningExt(tif->tif_clientdata, tif->tif_name,
-	"incorrect count for field \"%s\" (%u, expecting %u); tag ignored",
-		    _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name,
-		    dir->tdir_count, count);
-		return (0);
-	} else if (count < dir->tdir_count) {
-		TIFFWarningExt(tif->tif_clientdata, tif->tif_name,
-	"incorrect count for field \"%s\" (%u, expecting %u); tag trimmed",
-		    _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name,
-		    dir->tdir_count, count);
-		return (1);
-	}
-	return (1);
-}
-
-/*
- * Read IFD structure from the specified offset. If the pointer to
- * nextdiroff variable has been specified, read it too. Function returns a
- * number of fields in the directory or 0 if failed.
- */
-static uint16
-TIFFFetchDirectory(TIFF* tif, toff_t diroff, TIFFDirEntry **pdir,
-		   toff_t *nextdiroff)
-{
-	static const char module[] = "TIFFFetchDirectory";
-
-	TIFFDirEntry *dir;
-	uint16 dircount;
-
-	assert(pdir);
-
-	tif->tif_diroff = diroff;
-	if (nextdiroff)
-		*nextdiroff = 0;
-	if (!isMapped(tif)) {
-		if (!SeekOK(tif, tif->tif_diroff)) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-				"%s: Seek error accessing TIFF directory",
-				tif->tif_name);
-			return 0;
-		}
-		if (!ReadOK(tif, &dircount, sizeof (uint16))) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-				"%s: Can not read TIFF directory count",
-				tif->tif_name);
-			return 0;
-		}
-		if (tif->tif_flags & TIFF_SWAB)
-			TIFFSwabShort(&dircount);
-		dir = (TIFFDirEntry *)_TIFFCheckMalloc(tif, dircount,
-						sizeof (TIFFDirEntry),
-						"to read TIFF directory");
-		if (dir == NULL)
-			return 0;
-		if (!ReadOK(tif, dir, dircount*sizeof (TIFFDirEntry))) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-				"%.100s: Can not read TIFF directory",
-				tif->tif_name);
-			_TIFFfree(dir);
-			return 0;
-		}
-		/*
-		 * Read offset to next directory for sequential scans if
-		 * needed.
-		 */
-		if (nextdiroff)
-			(void) ReadOK(tif, nextdiroff, sizeof(uint32));
-	} else {
-		toff_t off = tif->tif_diroff;
-
-		/*
-		 * Check for integer overflow when validating the dir_off,
-		 * otherwise a very high offset may cause an OOB read and
-		 * crash the client. Make two comparisons instead of
-		 *
-		 *  off + sizeof(uint16) > tif->tif_size
-		 *
-		 * to avoid overflow.
-		 */
-		if (tif->tif_size < sizeof (uint16) ||
-		    off > tif->tif_size - sizeof(uint16)) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-				"%s: Can not read TIFF directory count",
-				tif->tif_name);
-			return 0;
-		} else {
-			_TIFFmemcpy(&dircount, tif->tif_base + off,
-				    sizeof(uint16));
-		}
-		off += sizeof (uint16);
-		if (tif->tif_flags & TIFF_SWAB)
-			TIFFSwabShort(&dircount);
-		dir = (TIFFDirEntry *)_TIFFCheckMalloc(tif, dircount,
-						sizeof(TIFFDirEntry),
-						"to read TIFF directory");
-		if (dir == NULL)
-			return 0;
-		if (off + dircount * sizeof (TIFFDirEntry) > tif->tif_size) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-				     "%s: Can not read TIFF directory",
-				     tif->tif_name);
-			_TIFFfree(dir);
-			return 0;
-		} else {
-			_TIFFmemcpy(dir, tif->tif_base + off,
-				    dircount * sizeof(TIFFDirEntry));
-		}
-		if (nextdiroff) {
-			off += dircount * sizeof (TIFFDirEntry);
-			if (off + sizeof (uint32) <= tif->tif_size) {
-				_TIFFmemcpy(nextdiroff, tif->tif_base + off,
-					    sizeof (uint32));
-			}
-		}
-	}
-	if (nextdiroff && tif->tif_flags & TIFF_SWAB)
-		TIFFSwabLong(nextdiroff);
-	*pdir = dir;
-	return dircount;
-}
-
-/*
- * Fetch a contiguous directory item.
- */
-static tsize_t
-TIFFFetchData(TIFF* tif, TIFFDirEntry* dir, char* cp)
-{
-	uint32 w = TIFFDataWidth((TIFFDataType) dir->tdir_type);
-	/* 
-	 * FIXME: butecount should have tsize_t type, but for now libtiff
-	 * defines tsize_t as a signed 32-bit integer and we are losing
-	 * ability to read arrays larger than 2^31 bytes. So we are using
-	 * uint32 instead of tsize_t here.
-	 */
-	uint32 cc = dir->tdir_count * w;
-
-	/* Check for overflow. */
-	if (!dir->tdir_count || !w || cc / w != dir->tdir_count)
-		goto bad;
-
-	if (!isMapped(tif)) {
-		if (!SeekOK(tif, dir->tdir_offset))
-			goto bad;
-		if (!ReadOK(tif, cp, cc))
-			goto bad;
-	} else {
-		/* Check for overflow. */
-		if (dir->tdir_offset + cc < dir->tdir_offset
-		    || dir->tdir_offset + cc < cc
-		    || dir->tdir_offset + cc > tif->tif_size)
-			goto bad;
-		_TIFFmemcpy(cp, tif->tif_base + dir->tdir_offset, 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;
-		}
-	}
-	return (cc);
-bad:
-	TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-		     "Error fetching data for field \"%s\"",
-		     _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
-	return (tsize_t) 0;
-}
-
-/*
- * Fetch an ASCII item from the file.
- */
-static tsize_t
-TIFFFetchString(TIFF* tif, TIFFDirEntry* dir, char* cp)
-{
-	if (dir->tdir_count <= 4) {
-		uint32 l = dir->tdir_offset;
-		if (tif->tif_flags & TIFF_SWAB)
-			TIFFSwabLong(&l);
-		_TIFFmemcpy(cp, &l, dir->tdir_count);
-		return (1);
-	}
-	return (TIFFFetchData(tif, dir, cp));
-}
-
-/*
- * Convert numerator+denominator to float.
- */
-static int
-cvtRational(TIFF* tif, TIFFDirEntry* dir, uint32 num, uint32 denom, float* rv)
-{
-	if (denom == 0) {
-		TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-		    "%s: Rational with zero denominator (num = %u)",
-		    _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, num);
-		return (0);
-	} else {
-		if (dir->tdir_type == TIFF_RATIONAL)
-			*rv = ((float)num / (float)denom);
-		else
-			*rv = ((float)(int32)num / (float)(int32)denom);
-		return (1);
-	}
-}
-
-/*
- * Fetch a rational item from the file at offset off and return the value as a
- * floating point number.
- */
-static float
-TIFFFetchRational(TIFF* tif, TIFFDirEntry* dir)
-{
-	uint32 l[2];
-	float v;
-
-	return (!TIFFFetchData(tif, dir, (char *)l) ||
-	    !cvtRational(tif, dir, l[0], l[1], &v) ? 1.0f : v);
-}
-
-/*
- * Fetch a single floating point value from the offset field and return it as
- * a native float.
- */
-static float
-TIFFFetchFloat(TIFF* tif, TIFFDirEntry* dir)
-{
-	float v;
-	int32 l = TIFFExtractData(tif, dir->tdir_type, dir->tdir_offset);
-        _TIFFmemcpy(&v, &l, sizeof(float));
-	TIFFCvtIEEEFloatToNative(tif, 1, &v);
-	return (v);
-}
-
-/*
- * Fetch an array of BYTE or SBYTE values.
- */
-static int
-TIFFFetchByteArray(TIFF* tif, TIFFDirEntry* dir, uint8* v)
-{
-    if (dir->tdir_count <= 4) {
-        /*
-         * Extract data from offset field.
-         */
-        if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
-	    if (dir->tdir_type == TIFF_SBYTE)
-                switch (dir->tdir_count) {
-                    case 4: v[3] = dir->tdir_offset & 0xff;
-                    case 3: v[2] = (dir->tdir_offset >> 8) & 0xff;
-                    case 2: v[1] = (dir->tdir_offset >> 16) & 0xff;
-		    case 1: v[0] = dir->tdir_offset >> 24;
-                }
-	    else
-                switch (dir->tdir_count) {
-                    case 4: v[3] = dir->tdir_offset & 0xff;
-                    case 3: v[2] = (dir->tdir_offset >> 8) & 0xff;
-                    case 2: v[1] = (dir->tdir_offset >> 16) & 0xff;
-		    case 1: v[0] = dir->tdir_offset >> 24;
-                }
-	} else {
-	    if (dir->tdir_type == TIFF_SBYTE)
-                switch (dir->tdir_count) {
-                    case 4: v[3] = dir->tdir_offset >> 24;
-                    case 3: v[2] = (dir->tdir_offset >> 16) & 0xff;
-                    case 2: v[1] = (dir->tdir_offset >> 8) & 0xff;
-                    case 1: v[0] = dir->tdir_offset & 0xff;
-		}
-	    else
-                switch (dir->tdir_count) {
-                    case 4: v[3] = dir->tdir_offset >> 24;
-                    case 3: v[2] = (dir->tdir_offset >> 16) & 0xff;
-                    case 2: v[1] = (dir->tdir_offset >> 8) & 0xff;
-                    case 1: v[0] = dir->tdir_offset & 0xff;
-		}
-	}
-        return (1);
-    } else
-        return (TIFFFetchData(tif, dir, (char*) v) != 0);	/* XXX */
-}
-
-/*
- * Fetch an array of SHORT or SSHORT values.
- */
-static int
-TIFFFetchShortArray(TIFF* tif, TIFFDirEntry* dir, uint16* v)
-{
-	if (dir->tdir_count <= 2) {
-		if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) {
-			switch (dir->tdir_count) {
-			case 2: v[1] = (uint16) (dir->tdir_offset & 0xffff);
-			case 1: v[0] = (uint16) (dir->tdir_offset >> 16);
-			}
-		} else {
-			switch (dir->tdir_count) {
-			case 2: v[1] = (uint16) (dir->tdir_offset >> 16);
-			case 1: v[0] = (uint16) (dir->tdir_offset & 0xffff);
-			}
-		}
-		return (1);
-	} else
-		return (TIFFFetchData(tif, dir, (char *)v) != 0);
-}
-
-/*
- * Fetch a pair of SHORT or BYTE values. Some tags may have either BYTE
- * or SHORT type and this function works with both ones.
- */
-static int
-TIFFFetchShortPair(TIFF* tif, TIFFDirEntry* dir)
-{
-	/*
-	 * Prevent overflowing the v stack arrays below by performing a sanity
-	 * check on tdir_count, this should never be greater than two.
-	 */
-	if (dir->tdir_count > 2) {
-		TIFFWarningExt(tif->tif_clientdata, tif->tif_name,
-		"unexpected count for field \"%s\", %u, expected 2; ignored",
-			_TIFFFieldWithTag(tif, dir->tdir_tag)->field_name,
-			dir->tdir_count);
-		return 0;
-	}
-
-	switch (dir->tdir_type) {
-		case TIFF_BYTE:
-		case TIFF_SBYTE:
-			{
-			uint8 v[4];
-			return TIFFFetchByteArray(tif, dir, v)
-				&& TIFFSetField(tif, dir->tdir_tag, v[0], v[1]);
-			}
-		case TIFF_SHORT:
-		case TIFF_SSHORT:
-			{
-			uint16 v[2];
-			return TIFFFetchShortArray(tif, dir, v)
-				&& TIFFSetField(tif, dir->tdir_tag, v[0], v[1]);
-			}
-		default:
-			return 0;
-	}
-}
-
-/*
- * Fetch an array of LONG or SLONG values.
- */
-static int
-TIFFFetchLongArray(TIFF* tif, TIFFDirEntry* dir, uint32* v)
-{
-	if (dir->tdir_count == 1) {
-		v[0] = dir->tdir_offset;
-		return (1);
-	} else
-		return (TIFFFetchData(tif, dir, (char*) v) != 0);
-}
-
-/*
- * Fetch an array of RATIONAL or SRATIONAL values.
- */
-static int
-TIFFFetchRationalArray(TIFF* tif, TIFFDirEntry* dir, float* v)
-{
-	int ok = 0;
-	uint32* l;
-
-	l = (uint32*)_TIFFCheckMalloc(tif,
-	    dir->tdir_count, TIFFDataWidth((TIFFDataType) dir->tdir_type),
-	    "to fetch array of rationals");
-	if (l) {
-		if (TIFFFetchData(tif, dir, (char *)l)) {
-			uint32 i;
-			for (i = 0; i < dir->tdir_count; i++) {
-				ok = cvtRational(tif, dir,
-				    l[2*i+0], l[2*i+1], &v[i]);
-				if (!ok)
-					break;
-			}
-		}
-		_TIFFfree((char *)l);
-	}
-	return (ok);
-}
-
-/*
- * Fetch an array of FLOAT values.
- */
-static int
-TIFFFetchFloatArray(TIFF* tif, TIFFDirEntry* dir, float* v)
-{
-
-	if (dir->tdir_count == 1) {
-	        union
-		{
-		  float  f;
-		  uint32 i;
-		} float_union;
-
-		float_union.i=dir->tdir_offset;
-		v[0]=float_union.f;
-		TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v);
-		return (1);
-	} else	if (TIFFFetchData(tif, dir, (char*) v)) {
-		TIFFCvtIEEEFloatToNative(tif, dir->tdir_count, v);
-		return (1);
-	} else
-		return (0);
-}
-
-/*
- * Fetch an array of DOUBLE values.
- */
-static int
-TIFFFetchDoubleArray(TIFF* tif, TIFFDirEntry* dir, double* v)
-{
-	if (TIFFFetchData(tif, dir, (char*) v)) {
-		TIFFCvtIEEEDoubleToNative(tif, dir->tdir_count, v);
-		return (1);
-	} else
-		return (0);
-}
-
-/*
- * Fetch an array of ANY values.  The actual values are returned as doubles
- * which should be able hold all the types.  Yes, there really should be an
- * tany_t to avoid this potential non-portability ...  Note in particular that
- * we assume that the double return value vector is large enough to read in
- * any fundamental type.  We use that vector as a buffer to read in the base
- * type vector and then convert it in place to double (from end to front of
- * course).
- */
-static int
-TIFFFetchAnyArray(TIFF* tif, TIFFDirEntry* dir, double* v)
-{
-	int i;
-
-	switch (dir->tdir_type) {
-	case TIFF_BYTE:
-	case TIFF_SBYTE:
-		if (!TIFFFetchByteArray(tif, dir, (uint8*) v))
-			return (0);
-		if (dir->tdir_type == TIFF_BYTE) {
-			uint8* vp = (uint8*) v;
-			for (i = dir->tdir_count-1; i >= 0; i--)
-				v[i] = vp[i];
-		} else {
-			int8* vp = (int8*) v;
-			for (i = dir->tdir_count-1; i >= 0; i--)
-				v[i] = vp[i];
-		}
-		break;
-	case TIFF_SHORT:
-	case TIFF_SSHORT:
-		if (!TIFFFetchShortArray(tif, dir, (uint16*) v))
-			return (0);
-		if (dir->tdir_type == TIFF_SHORT) {
-			uint16* vp = (uint16*) v;
-			for (i = dir->tdir_count-1; i >= 0; i--)
-				v[i] = vp[i];
-		} else {
-			int16* vp = (int16*) v;
-			for (i = dir->tdir_count-1; i >= 0; i--)
-				v[i] = vp[i];
-		}
-		break;
-	case TIFF_LONG:
-	case TIFF_SLONG:
-		if (!TIFFFetchLongArray(tif, dir, (uint32*) v))
-			return (0);
-		if (dir->tdir_type == TIFF_LONG) {
-			uint32* vp = (uint32*) v;
-			for (i = dir->tdir_count-1; i >= 0; i--)
-				v[i] = vp[i];
-		} else {
-			int32* vp = (int32*) v;
-			for (i = dir->tdir_count-1; i >= 0; i--)
-				v[i] = vp[i];
-		}
-		break;
-	case TIFF_RATIONAL:
-	case TIFF_SRATIONAL:
-		if (!TIFFFetchRationalArray(tif, dir, (float*) v))
-			return (0);
-		{ float* vp = (float*) v;
-		  for (i = dir->tdir_count-1; i >= 0; i--)
-			v[i] = vp[i];
-		}
-		break;
-	case TIFF_FLOAT:
-		if (!TIFFFetchFloatArray(tif, dir, (float*) v))
-			return (0);
-		{ float* vp = (float*) v;
-		  for (i = dir->tdir_count-1; i >= 0; i--)
-			v[i] = vp[i];
-		}
-		break;
-	case TIFF_DOUBLE:
-		return (TIFFFetchDoubleArray(tif, dir, (double*) v));
-	default:
-		/* TIFF_NOTYPE */
-		/* TIFF_ASCII */
-		/* TIFF_UNDEFINED */
-		TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-			     "cannot read TIFF_ANY type %d for field \"%s\"",
-			     dir->tdir_type,
-			     _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
-		return (0);
-	}
-	return (1);
-}
-
-/*
- * Fetch a tag that is not handled by special case code.
- */
-static int
-TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp)
-{
-	static const char mesg[] = "to fetch tag value";
-	int ok = 0;
-	const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dp->tdir_tag);
-
-	if (dp->tdir_count > 1) {		/* array of values */
-		char* cp = NULL;
-
-		switch (dp->tdir_type) {
-		case TIFF_BYTE:
-		case TIFF_SBYTE:
-			cp = (char *)_TIFFCheckMalloc(tif,
-			    dp->tdir_count, sizeof (uint8), mesg);
-			ok = cp && TIFFFetchByteArray(tif, dp, (uint8*) cp);
-			break;
-		case TIFF_SHORT:
-		case TIFF_SSHORT:
-			cp = (char *)_TIFFCheckMalloc(tif,
-			    dp->tdir_count, sizeof (uint16), mesg);
-			ok = cp && TIFFFetchShortArray(tif, dp, (uint16*) cp);
-			break;
-		case TIFF_LONG:
-		case TIFF_SLONG:
-			cp = (char *)_TIFFCheckMalloc(tif,
-			    dp->tdir_count, sizeof (uint32), mesg);
-			ok = cp && TIFFFetchLongArray(tif, dp, (uint32*) cp);
-			break;
-		case TIFF_RATIONAL:
-		case TIFF_SRATIONAL:
-			cp = (char *)_TIFFCheckMalloc(tif,
-			    dp->tdir_count, sizeof (float), mesg);
-			ok = cp && TIFFFetchRationalArray(tif, dp, (float*) cp);
-			break;
-		case TIFF_FLOAT:
-			cp = (char *)_TIFFCheckMalloc(tif,
-			    dp->tdir_count, sizeof (float), mesg);
-			ok = cp && TIFFFetchFloatArray(tif, dp, (float*) cp);
-			break;
-		case TIFF_DOUBLE:
-			cp = (char *)_TIFFCheckMalloc(tif,
-			    dp->tdir_count, sizeof (double), mesg);
-			ok = cp && TIFFFetchDoubleArray(tif, dp, (double*) cp);
-			break;
-		case TIFF_ASCII:
-		case TIFF_UNDEFINED:		/* bit of a cheat... */
-			/*
-			 * Some vendors write strings w/o the trailing
-			 * NULL byte, so always append one just in case.
-			 */
-			cp = (char *)_TIFFCheckMalloc(tif, dp->tdir_count + 1,
-						      1, mesg);
-			if( (ok = (cp && TIFFFetchString(tif, dp, cp))) != 0 )
-				cp[dp->tdir_count] = '\0';	/* XXX */
-			break;
-		}
-		if (ok) {
-			ok = (fip->field_passcount ?
-			    TIFFSetField(tif, dp->tdir_tag, dp->tdir_count, cp)
-			  : TIFFSetField(tif, dp->tdir_tag, cp));
-		}
-		if (cp != NULL)
-			_TIFFfree(cp);
-	} else if (CheckDirCount(tif, dp, 1)) {	/* singleton value */
-		switch (dp->tdir_type) {
-		case TIFF_BYTE:
-		case TIFF_SBYTE:
-		case TIFF_SHORT:
-		case TIFF_SSHORT:
-			/*
-			 * If the tag is also acceptable as a LONG or SLONG
-			 * then TIFFSetField will expect an uint32 parameter
-			 * passed to it (through varargs).  Thus, for machines
-			 * where sizeof (int) != sizeof (uint32) we must do
-			 * a careful check here.  It's hard to say if this
-			 * is worth optimizing.
-			 *
-			 * NB: We use TIFFFieldWithTag here knowing that
-			 *     it returns us the first entry in the table
-			 *     for the tag and that that entry is for the
-			 *     widest potential data type the tag may have.
-			 */
-			{ TIFFDataType type = fip->field_type;
-			  if (type != TIFF_LONG && type != TIFF_SLONG) {
-				uint16 v = (uint16)
-			   TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset);
-				ok = (fip->field_passcount ?
-				    TIFFSetField(tif, dp->tdir_tag, 1, &v)
-				  : TIFFSetField(tif, dp->tdir_tag, v));
-				break;
-			  }
-			}
-			/* fall thru... */
-		case TIFF_LONG:
-		case TIFF_SLONG:
-			{ uint32 v32 =
-		    TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset);
-			  ok = (fip->field_passcount ? 
-			      TIFFSetField(tif, dp->tdir_tag, 1, &v32)
-			    : TIFFSetField(tif, dp->tdir_tag, v32));
-			}
-			break;
-		case TIFF_RATIONAL:
-		case TIFF_SRATIONAL:
-		case TIFF_FLOAT:
-			{ float v = (dp->tdir_type == TIFF_FLOAT ? 
-			      TIFFFetchFloat(tif, dp)
-			    : TIFFFetchRational(tif, dp));
-			  ok = (fip->field_passcount ?
-			      TIFFSetField(tif, dp->tdir_tag, 1, &v)
-			    : TIFFSetField(tif, dp->tdir_tag, v));
-			}
-			break;
-		case TIFF_DOUBLE:
-			{ double v;
-			  ok = (TIFFFetchDoubleArray(tif, dp, &v) &&
-			    (fip->field_passcount ?
-			      TIFFSetField(tif, dp->tdir_tag, 1, &v)
-			    : TIFFSetField(tif, dp->tdir_tag, v))
-			  );
-			}
-			break;
-		case TIFF_ASCII:
-		case TIFF_UNDEFINED:		/* bit of a cheat... */
-			{ char c[2];
-			  if( (ok = (TIFFFetchString(tif, dp, c) != 0)) != 0 ) {
-				c[1] = '\0';		/* XXX paranoid */
-				ok = (fip->field_passcount ?
-					TIFFSetField(tif, dp->tdir_tag, 1, c)
-				      : TIFFSetField(tif, dp->tdir_tag, c));
-			  }
-			}
-			break;
-		}
-	}
-	return (ok);
-}
-
-#define	NITEMS(x)	(sizeof (x) / sizeof (x[0]))
-/*
- * Fetch samples/pixel short values for 
- * the specified tag and verify that
- * all values are the same.
- */
-static int
-TIFFFetchPerSampleShorts(TIFF* tif, TIFFDirEntry* dir, uint16* pl)
-{
-    uint16 samples = tif->tif_dir.td_samplesperpixel;
-    int status = 0;
-
-    if (CheckDirCount(tif, dir, (uint32) samples)) {
-        uint16 buf[10];
-        uint16* v = buf;
-
-        if (dir->tdir_count > NITEMS(buf))
-            v = (uint16*) _TIFFCheckMalloc(tif, dir->tdir_count, sizeof(uint16),
-                                      "to fetch per-sample values");
-        if (v && TIFFFetchShortArray(tif, dir, v)) {
-            uint16 i;
-            int check_count = dir->tdir_count;
-            if( samples < check_count )
-                check_count = samples;
-
-            for (i = 1; i < check_count; i++)
-                if (v[i] != v[0]) {
-			TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-                "Cannot handle different per-sample values for field \"%s\"",
-			_TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
-			goto bad;
-                }
-            *pl = v[0];
-            status = 1;
-        }
-      bad:
-        if (v && v != buf)
-            _TIFFfree(v);
-    }
-    return (status);
-}
-
-/*
- * Fetch samples/pixel long values for 
- * the specified tag and verify that
- * all values are the same.
- */
-static int
-TIFFFetchPerSampleLongs(TIFF* tif, TIFFDirEntry* dir, uint32* pl)
-{
-    uint16 samples = tif->tif_dir.td_samplesperpixel;
-    int status = 0;
-
-    if (CheckDirCount(tif, dir, (uint32) samples)) {
-        uint32 buf[10];
-        uint32* v = buf;
-
-        if (dir->tdir_count > NITEMS(buf))
-            v = (uint32*) _TIFFCheckMalloc(tif, dir->tdir_count, sizeof(uint32),
-                                      "to fetch per-sample values");
-        if (v && TIFFFetchLongArray(tif, dir, v)) {
-            uint16 i;
-            int check_count = dir->tdir_count;
-
-            if( samples < check_count )
-                check_count = samples;
-            for (i = 1; i < check_count; i++)
-                if (v[i] != v[0]) {
-			TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-                "Cannot handle different per-sample values for field \"%s\"",
-			_TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
-			goto bad;
-                }
-            *pl = v[0];
-            status = 1;
-        }
-      bad:
-        if (v && v != buf)
-            _TIFFfree(v);
-    }
-    return (status);
-}
-
-/*
- * Fetch samples/pixel ANY values for the specified tag and verify that all
- * values are the same.
- */
-static int
-TIFFFetchPerSampleAnys(TIFF* tif, TIFFDirEntry* dir, double* pl)
-{
-    uint16 samples = tif->tif_dir.td_samplesperpixel;
-    int status = 0;
-
-    if (CheckDirCount(tif, dir, (uint32) samples)) {
-        double buf[10];
-        double* v = buf;
-
-        if (dir->tdir_count > NITEMS(buf))
-            v = (double*) _TIFFCheckMalloc(tif, dir->tdir_count, sizeof (double),
-                                      "to fetch per-sample values");
-        if (v && TIFFFetchAnyArray(tif, dir, v)) {
-            uint16 i;
-            int check_count = dir->tdir_count;
-            if( samples < check_count )
-                check_count = samples;
-
-            for (i = 1; i < check_count; i++)
-                if (v[i] != v[0]) {
-			TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-		"Cannot handle different per-sample values for field \"%s\"",
-			_TIFFFieldWithTag(tif, dir->tdir_tag)->field_name);
-			goto bad;
-                }
-            *pl = v[0];
-            status = 1;
-        }
-      bad:
-        if (v && v != buf)
-            _TIFFfree(v);
-    }
-    return (status);
-}
-#undef NITEMS
-
-/*
- * Fetch a set of offsets or lengths.
- * While this routine says "strips", in fact it's also used for tiles.
- */
-static int
-TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, long nstrips, uint32** lpp)
-{
-	register uint32* lp;
-	int status;
-
-        CheckDirCount(tif, dir, (uint32) nstrips);
-
-	/*
-	 * Allocate space for strip information.
-	 */
-	if (*lpp == NULL &&
-	    (*lpp = (uint32 *)_TIFFCheckMalloc(tif,
-	      nstrips, sizeof (uint32), "for strip array")) == NULL)
-		return (0);
-	lp = *lpp;
-        _TIFFmemset( lp, 0, sizeof(uint32) * nstrips );
-
-	if (dir->tdir_type == (int)TIFF_SHORT) {
-		/*
-		 * Handle uint16->uint32 expansion.
-		 */
-		uint16* dp = (uint16*) _TIFFCheckMalloc(tif,
-		    dir->tdir_count, sizeof (uint16), "to fetch strip tag");
-		if (dp == NULL)
-			return (0);
-		if( (status = TIFFFetchShortArray(tif, dir, dp)) != 0 ) {
-                    int i;
-                    
-                    for( i = 0; i < nstrips && i < (int) dir->tdir_count; i++ )
-                    {
-                        lp[i] = dp[i];
-                    }
-		}
-		_TIFFfree((char*) dp);
-
-        } else if( nstrips != (int) dir->tdir_count ) {
-            /* Special case to correct length */
-
-            uint32* dp = (uint32*) _TIFFCheckMalloc(tif,
-		    dir->tdir_count, sizeof (uint32), "to fetch strip tag");
-            if (dp == NULL)
-                return (0);
-
-            status = TIFFFetchLongArray(tif, dir, dp);
-            if( status != 0 ) {
-                int i;
-
-                for( i = 0; i < nstrips && i < (int) dir->tdir_count; i++ )
-                {
-                    lp[i] = dp[i];
-                }
-            }
-
-            _TIFFfree( (char *) dp );
-	} else
-            status = TIFFFetchLongArray(tif, dir, lp);
-        
-	return (status);
-}
-
-/*
- * Fetch and set the RefBlackWhite tag.
- */
-static int
-TIFFFetchRefBlackWhite(TIFF* tif, TIFFDirEntry* dir)
-{
-	static const char mesg[] = "for \"ReferenceBlackWhite\" array";
-	char* cp;
-	int ok;
-
-	if (dir->tdir_type == TIFF_RATIONAL)
-		return (TIFFFetchNormalTag(tif, dir));
-	/*
-	 * Handle LONG's for backward compatibility.
-	 */
-	cp = (char *)_TIFFCheckMalloc(tif, dir->tdir_count,
-				      sizeof (uint32), mesg);
-	if( (ok = (cp && TIFFFetchLongArray(tif, dir, (uint32*) cp))) != 0) {
-		float* fp = (float*)
-		    _TIFFCheckMalloc(tif, dir->tdir_count, sizeof (float), mesg);
-		if( (ok = (fp != NULL)) != 0 ) {
-			uint32 i;
-			for (i = 0; i < dir->tdir_count; i++)
-				fp[i] = (float)((uint32*) cp)[i];
-			ok = TIFFSetField(tif, dir->tdir_tag, fp);
-			_TIFFfree((char*) fp);
-		}
-	}
-	if (cp)
-		_TIFFfree(cp);
-	return (ok);
-}
-
-/*
- * Fetch and set the SubjectDistance EXIF tag.
- */
-static int
-TIFFFetchSubjectDistance(TIFF* tif, TIFFDirEntry* dir)
-{
-	uint32 l[2];
-	float v;
-	int ok = 0;
-
-    if( dir->tdir_count != 1 || dir->tdir_type != TIFF_RATIONAL )
-    {
-		TIFFWarningExt(tif->tif_clientdata, tif->tif_name,
-                       "incorrect count or type for SubjectDistance, tag ignored" );
-		return (0);
-    }
-
-	if (TIFFFetchData(tif, dir, (char *)l)
-	    && cvtRational(tif, dir, l[0], l[1], &v)) {
-		/*
-		 * XXX: Numerator 0xFFFFFFFF means that we have infinite
-		 * distance. Indicate that with a negative floating point
-		 * SubjectDistance value.
-		 */
-		ok = TIFFSetField(tif, dir->tdir_tag,
-				  (l[0] != 0xFFFFFFFF) ? v : -v);
-	}
-
-	return ok;
-}
-
-/*
- * Replace a single strip (tile) of uncompressed data by multiple strips
- * (tiles), each approximately STRIP_SIZE_DEFAULT bytes. This is useful for
- * dealing with large images or for dealing with machines with a limited
- * amount memory.
- */
-static void
-ChopUpSingleUncompressedStrip(TIFF* tif)
-{
-	register TIFFDirectory *td = &tif->tif_dir;
-	uint32 bytecount = td->td_stripbytecount[0];
-	uint32 offset = td->td_stripoffset[0];
-	tsize_t rowbytes = TIFFVTileSize(tif, 1), stripbytes;
-	tstrip_t strip, nstrips, rowsperstrip;
-	uint32* newcounts;
-	uint32* newoffsets;
-
-	/*
-	 * Make the rows hold at least one scanline, but fill specified amount
-	 * of data if possible.
-	 */
-	if (rowbytes > STRIP_SIZE_DEFAULT) {
-		stripbytes = rowbytes;
-		rowsperstrip = 1;
-	} else if (rowbytes > 0 ) {
-		rowsperstrip = STRIP_SIZE_DEFAULT / rowbytes;
-		stripbytes = rowbytes * rowsperstrip;
-	}
-        else
-            return;
-
-	/* 
-	 * never increase the number of strips in an image
-	 */
-	if (rowsperstrip >= td->td_rowsperstrip)
-		return;
-	nstrips = (tstrip_t) TIFFhowmany(bytecount, stripbytes);
-        if( nstrips == 0 ) /* something is wonky, do nothing. */
-            return;
-
-	newcounts = (uint32*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint32),
-				"for chopped \"StripByteCounts\" array");
-	newoffsets = (uint32*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint32),
-				"for chopped \"StripOffsets\" array");
-	if (newcounts == NULL || newoffsets == NULL) {
-	        /*
-		 * Unable to allocate new strip information, give up and use
-		 * the original one strip information.
-		 */
-		if (newcounts != NULL)
-			_TIFFfree(newcounts);
-		if (newoffsets != NULL)
-			_TIFFfree(newoffsets);
-		return;
-	}
-	/*
-	 * Fill the strip information arrays with new bytecounts and offsets
-	 * that reflect the broken-up format.
-	 */
-	for (strip = 0; strip < nstrips; strip++) {
-		if ((uint32)stripbytes > bytecount)
-			stripbytes = bytecount;
-		newcounts[strip] = stripbytes;
-		newoffsets[strip] = offset;
-		offset += stripbytes;
-		bytecount -= stripbytes;
-	}
-	/*
-	 * Replace old single strip info with multi-strip info.
-	 */
-	td->td_stripsperimage = td->td_nstrips = nstrips;
-	TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip);
-
-	_TIFFfree(td->td_stripbytecount);
-	_TIFFfree(td->td_stripoffset);
-	td->td_stripbytecount = newcounts;
-	td->td_stripoffset = newoffsets;
-	td->td_stripbytecountsorted = 1;
-}
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 8
- * fill-column: 78
- * End:
- */