/*
 * 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.
 *
 * Core Directory Tag Support.
 */
#include "tiffiop.h"
#include <stdlib.h>

/*
 * NOTE: THIS ARRAY IS ASSUMED TO BE SORTED BY TAG.
 *
 * NOTE: The second field (field_readcount) and third field (field_writecount)
 *       sometimes use the values TIFF_VARIABLE (-1), TIFF_VARIABLE2 (-3)
 *       and TIFF_SPP (-2). The macros should be used but would throw off
 *       the formatting of the code, so please interpret the -1, -2 and -3
 *       values accordingly.
 */

/* const object should be initialized */
#ifdef _MSC_VER
#pragma warning( push )
#pragma warning( disable : 4132 )
#endif
static const TIFFFieldArray tiffFieldArray;
static const TIFFFieldArray exifFieldArray;
static const TIFFFieldArray gpsFieldArray;
#ifdef _MSC_VER
#pragma warning( pop )
#endif
/*--: Rational2Double: --
 * The Rational2Double upgraded libtiff functionality allows the definition and achievement of true double-precision accuracy
 * for TIFF tags of RATIONAL type and field_bit=FIELD_CUSTOM using the set_field_type = TIFF_SETGET_DOUBLE.
 * Unfortunately, that changes the old implemented interface for TIFFGetField().
 * In order to keep the old TIFFGetField() interface behavior those tags have to be redefined with set_field_type = TIFF_SETGET_FLOAT!
 *
 *  Rational custom arrays are already defined as _Cxx_FLOAT, thus can stay.
 *
 */

static const TIFFField
tiffFields[] = {
	{ TIFFTAG_SUBFILETYPE, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_SUBFILETYPE, 1, 0, "SubfileType", NULL },
	{ TIFFTAG_OSUBFILETYPE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_SUBFILETYPE, 1, 0, "OldSubfileType", NULL },
	{ TIFFTAG_IMAGEWIDTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_IMAGEDIMENSIONS, 0, 0, "ImageWidth", NULL },
	{ TIFFTAG_IMAGELENGTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_IMAGEDIMENSIONS, 1, 0, "ImageLength", NULL },
	{ TIFFTAG_BITSPERSAMPLE, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_BITSPERSAMPLE, 0, 0, "BitsPerSample", NULL },
	{ TIFFTAG_COMPRESSION, -1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_COMPRESSION, 0, 0, "Compression", NULL },
	{ TIFFTAG_PHOTOMETRIC, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_PHOTOMETRIC, 0, 0, "PhotometricInterpretation", NULL },
	{ TIFFTAG_THRESHHOLDING, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_THRESHHOLDING, 1, 0, "Threshholding", NULL },
	{ TIFFTAG_CELLWIDTH, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_IGNORE, 1, 0, "CellWidth", NULL },
	{ TIFFTAG_CELLLENGTH, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_IGNORE, 1, 0, "CellLength", NULL },
	{ TIFFTAG_FILLORDER, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_FILLORDER, 0, 0, "FillOrder", NULL },
	{ TIFFTAG_DOCUMENTNAME, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "DocumentName", NULL },
	{ TIFFTAG_IMAGEDESCRIPTION, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ImageDescription", NULL },
	{ TIFFTAG_MAKE, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Make", NULL },
	{ TIFFTAG_MODEL, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Model", NULL },
	{ TIFFTAG_STRIPOFFSETS, -1, -1, TIFF_LONG8, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_STRIPOFFSETS, 0, 0, "StripOffsets", NULL },
	{ TIFFTAG_ORIENTATION, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_ORIENTATION, 0, 0, "Orientation", NULL },
	{ TIFFTAG_SAMPLESPERPIXEL, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_SAMPLESPERPIXEL, 0, 0, "SamplesPerPixel", NULL },
	{ TIFFTAG_ROWSPERSTRIP, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_ROWSPERSTRIP, 0, 0, "RowsPerStrip", NULL },
	{ TIFFTAG_STRIPBYTECOUNTS, -1, -1, TIFF_LONG8, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_STRIPBYTECOUNTS, 0, 0, "StripByteCounts", NULL },
	{ TIFFTAG_MINSAMPLEVALUE, -2, -1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_MINSAMPLEVALUE, 1, 0, "MinSampleValue", NULL },
	{ TIFFTAG_MAXSAMPLEVALUE, -2, -1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_MAXSAMPLEVALUE, 1, 0, "MaxSampleValue", NULL },
	{ TIFFTAG_XRESOLUTION, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_RESOLUTION, 1, 0, "XResolution", NULL },
	{ TIFFTAG_YRESOLUTION, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_RESOLUTION, 1, 0, "YResolution", NULL },
	{ TIFFTAG_PLANARCONFIG, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_PLANARCONFIG, 0, 0, "PlanarConfiguration", NULL },
	{ TIFFTAG_PAGENAME, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "PageName", NULL },
	{ TIFFTAG_XPOSITION, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_POSITION, 1, 0, "XPosition", NULL },
	{ TIFFTAG_YPOSITION, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_POSITION, 1, 0, "YPosition", NULL },
	{ TIFFTAG_FREEOFFSETS, -1, -1, TIFF_LONG8, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_IGNORE, 0, 0, "FreeOffsets", NULL },
	{ TIFFTAG_FREEBYTECOUNTS, -1, -1, TIFF_LONG8, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_IGNORE, 0, 0, "FreeByteCounts", NULL },
	{ TIFFTAG_GRAYRESPONSEUNIT, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_IGNORE, 1, 0, "GrayResponseUnit", NULL },
	{ TIFFTAG_GRAYRESPONSECURVE, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_IGNORE, 1, 0, "GrayResponseCurve", NULL },
	{ TIFFTAG_RESOLUTIONUNIT, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_RESOLUTIONUNIT, 1, 0, "ResolutionUnit", NULL },
	{ TIFFTAG_PAGENUMBER, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_UINT16_PAIR, TIFF_SETGET_UNDEFINED, FIELD_PAGENUMBER, 1, 0, "PageNumber", NULL },
	{ TIFFTAG_COLORRESPONSEUNIT, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_IGNORE, 1, 0, "ColorResponseUnit", NULL },
	{ TIFFTAG_TRANSFERFUNCTION, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_OTHER, TIFF_SETGET_UNDEFINED, FIELD_TRANSFERFUNCTION, 1, 0, "TransferFunction", NULL },
	{ TIFFTAG_SOFTWARE, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Software", NULL },
	{ TIFFTAG_DATETIME, 20, 20, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "DateTime", NULL },
	{ TIFFTAG_ARTIST, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Artist", NULL },
	{ TIFFTAG_HOSTCOMPUTER, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "HostComputer", NULL },
	{ TIFFTAG_WHITEPOINT, 2, 2, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "WhitePoint", NULL },
	{ TIFFTAG_PRIMARYCHROMATICITIES, 6, 6, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "PrimaryChromaticities", NULL },
	{ TIFFTAG_COLORMAP, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_OTHER, TIFF_SETGET_UNDEFINED, FIELD_COLORMAP, 1, 0, "ColorMap", NULL },
	{ TIFFTAG_HALFTONEHINTS, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_UINT16_PAIR, TIFF_SETGET_UNDEFINED, FIELD_HALFTONEHINTS, 1, 0, "HalftoneHints", NULL },
	{ TIFFTAG_TILEWIDTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_TILEDIMENSIONS, 0, 0, "TileWidth", NULL },
	{ TIFFTAG_TILELENGTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_TILEDIMENSIONS, 0, 0, "TileLength", NULL },
	{ TIFFTAG_TILEOFFSETS, -1, 1, TIFF_LONG8, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_STRIPOFFSETS, 0, 0, "TileOffsets", NULL },
	{ TIFFTAG_TILEBYTECOUNTS, -1, 1, TIFF_LONG8, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_STRIPBYTECOUNTS, 0, 0, "TileByteCounts", NULL },
	{ TIFFTAG_SUBIFD, -1, -1, TIFF_IFD8, 0, TIFF_SETGET_C16_IFD8, TIFF_SETGET_UNDEFINED, FIELD_SUBIFD, 1, 1, "SubIFD", (TIFFFieldArray*) &tiffFieldArray },
	{ TIFFTAG_INKSET, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "InkSet", NULL },
	{ TIFFTAG_INKNAMES, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_C16_ASCII, TIFF_SETGET_UNDEFINED, FIELD_INKNAMES, 1, 1, "InkNames", NULL },
	{ TIFFTAG_NUMBEROFINKS, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "NumberOfInks", NULL },
	{ TIFFTAG_DOTRANGE, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_UINT16_PAIR, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "DotRange", NULL },
	{ TIFFTAG_TARGETPRINTER, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "TargetPrinter", NULL },
	{ TIFFTAG_EXTRASAMPLES, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_C16_UINT16, TIFF_SETGET_UNDEFINED, FIELD_EXTRASAMPLES, 0, 1, "ExtraSamples", NULL },
	{ TIFFTAG_SAMPLEFORMAT, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_SAMPLEFORMAT, 0, 0, "SampleFormat", NULL },
	{ TIFFTAG_SMINSAMPLEVALUE, -2, -1, TIFF_ANY, 0, TIFF_SETGET_DOUBLE, TIFF_SETGET_UNDEFINED, FIELD_SMINSAMPLEVALUE, 1, 0, "SMinSampleValue", NULL },
	{ TIFFTAG_SMAXSAMPLEVALUE, -2, -1, TIFF_ANY, 0, TIFF_SETGET_DOUBLE, TIFF_SETGET_UNDEFINED, FIELD_SMAXSAMPLEVALUE, 1, 0, "SMaxSampleValue", NULL },
	{ TIFFTAG_CLIPPATH, -1, -3, TIFF_BYTE, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "ClipPath", NULL },
	{ TIFFTAG_XCLIPPATHUNITS, 1, 1, TIFF_SLONG, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "XClipPathUnits", NULL },
	{ TIFFTAG_XCLIPPATHUNITS, 1, 1, TIFF_SBYTE, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "XClipPathUnits", NULL },
	{ TIFFTAG_YCLIPPATHUNITS, 1, 1, TIFF_SLONG, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "YClipPathUnits", NULL },
	{ TIFFTAG_YCBCRCOEFFICIENTS, 3, 3, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "YCbCrCoefficients", NULL },
	{ TIFFTAG_YCBCRSUBSAMPLING, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_UINT16_PAIR, TIFF_SETGET_UNDEFINED, FIELD_YCBCRSUBSAMPLING, 0, 0, "YCbCrSubsampling", NULL },
	{ TIFFTAG_YCBCRPOSITIONING, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_YCBCRPOSITIONING, 0, 0, "YCbCrPositioning", NULL },
	{ TIFFTAG_REFERENCEBLACKWHITE, 6, 6, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_REFBLACKWHITE, 1, 0, "ReferenceBlackWhite", NULL },
	{ TIFFTAG_XMLPACKET, -3, -3, TIFF_BYTE, 0, TIFF_SETGET_C32_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "XMLPacket", NULL },
	/* begin SGI tags */
	{ TIFFTAG_MATTEING, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_EXTRASAMPLES, 0, 0, "Matteing", NULL },
	{ TIFFTAG_DATATYPE, -2, -1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_SAMPLEFORMAT, 0, 0, "DataType", NULL },
	{ TIFFTAG_IMAGEDEPTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_IMAGEDEPTH, 0, 0, "ImageDepth", NULL },
	{ TIFFTAG_TILEDEPTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_TILEDEPTH, 0, 0, "TileDepth", NULL },
	/* end SGI tags */
	/* begin Pixar tags */
	{ TIFFTAG_PIXAR_IMAGEFULLWIDTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ImageFullWidth", NULL },
	{ TIFFTAG_PIXAR_IMAGEFULLLENGTH, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ImageFullLength", NULL },
	{ TIFFTAG_PIXAR_TEXTUREFORMAT, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "TextureFormat", NULL },
	{ TIFFTAG_PIXAR_WRAPMODES, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "TextureWrapModes", NULL },
	{ TIFFTAG_PIXAR_FOVCOT, 1, 1, TIFF_FLOAT, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FieldOfViewCotangent", NULL },
	{ TIFFTAG_PIXAR_MATRIX_WORLDTOSCREEN, 16, 16, TIFF_FLOAT, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "MatrixWorldToScreen", NULL },
	{ TIFFTAG_PIXAR_MATRIX_WORLDTOCAMERA, 16, 16, TIFF_FLOAT, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "MatrixWorldToCamera", NULL },
	{ TIFFTAG_CFAREPEATPATTERNDIM, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_C0_UINT16, TIFF_SETGET_UNDEFINED,	FIELD_CUSTOM, 0,	0,	"CFARepeatPatternDim", NULL },
	{ TIFFTAG_CFAPATTERN, -1, -1, TIFF_BYTE, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "CFAPattern" , NULL},
	{ TIFFTAG_COPYRIGHT, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Copyright", NULL },
	/* end Pixar tags */
	{ TIFFTAG_RICHTIFFIPTC, -3, -3, TIFF_UNDEFINED, 0, TIFF_SETGET_C32_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "RichTIFFIPTC", NULL },
	{ TIFFTAG_PHOTOSHOP, -3, -3, TIFF_BYTE, 0, TIFF_SETGET_C32_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "Photoshop", NULL },
	/*--: EXIFIFD and GPSIFD specified as TIFF_LONG by Aware-Systems and not TIFF_IFD8 as in original LibTiff.
	 *    However, for IFD-like tags, libtiff uses the data type TIFF_IFD8 in tiffFields[]-tag definition combined with
	 *    a special handling procedure in order to write either a 32-bit value and the TIFF_IFD type-id into ClassicTIFF files 
	 *    or a 64-bit value and the TIFF_IFD8 type-id into BigTIFF files. */
	{ TIFFTAG_EXIFIFD, 1, 1, TIFF_IFD8, 0, TIFF_SETGET_IFD8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "EXIFIFDOffset", (TIFFFieldArray*) &exifFieldArray },
	{ TIFFTAG_ICCPROFILE, -3, -3, TIFF_UNDEFINED, 0, TIFF_SETGET_C32_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "ICC Profile", NULL },
	{ TIFFTAG_GPSIFD, 1, 1, TIFF_IFD8, 0, TIFF_SETGET_IFD8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "GPSIFDOffset", (TIFFFieldArray*) &gpsFieldArray },
	{ TIFFTAG_FAXRECVPARAMS, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UINT32, FIELD_CUSTOM, TRUE, FALSE, "FaxRecvParams", NULL },
	{ TIFFTAG_FAXSUBADDRESS, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_ASCII, FIELD_CUSTOM, TRUE, FALSE, "FaxSubAddress", NULL },
	{ TIFFTAG_FAXRECVTIME, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UINT32, FIELD_CUSTOM, TRUE, FALSE, "FaxRecvTime", NULL },
	{ TIFFTAG_FAXDCS, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_ASCII, FIELD_CUSTOM, TRUE, FALSE, "FaxDcs", NULL },
	{ TIFFTAG_STONITS, 1, 1, TIFF_DOUBLE, 0, TIFF_SETGET_DOUBLE, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "StoNits", NULL },
	{ TIFFTAG_IMAGESOURCEDATA, -3, -3, TIFF_UNDEFINED, 0, TIFF_SETGET_C32_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "Adobe Photoshop Document Data Block", NULL },
	{ TIFFTAG_INTEROPERABILITYIFD, 1, 1, TIFF_IFD8, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "InteroperabilityIFDOffset", NULL },
	/* begin DNG tags */
	{ TIFFTAG_DNGVERSION, 4, 4, TIFF_BYTE, 0, TIFF_SETGET_C0_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "DNGVersion", NULL },
	{ TIFFTAG_DNGBACKWARDVERSION, 4, 4, TIFF_BYTE, 0, TIFF_SETGET_C0_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "DNGBackwardVersion", NULL },
	{ TIFFTAG_UNIQUECAMERAMODEL, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "UniqueCameraModel", NULL },
	{ TIFFTAG_LOCALIZEDCAMERAMODEL, -1, -1, TIFF_BYTE, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "LocalizedCameraModel", NULL },
	{ TIFFTAG_CFAPLANECOLOR, -1, -1, TIFF_BYTE, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "CFAPlaneColor", NULL },
	{ TIFFTAG_CFALAYOUT, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "CFALayout", NULL },
	{ TIFFTAG_LINEARIZATIONTABLE, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_C16_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "LinearizationTable", NULL },
	{ TIFFTAG_BLACKLEVELREPEATDIM, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_C0_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "BlackLevelRepeatDim", NULL },
	{ TIFFTAG_BLACKLEVEL, -1, -1, TIFF_RATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "BlackLevel", NULL },
	{ TIFFTAG_BLACKLEVELDELTAH, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "BlackLevelDeltaH", NULL },
	{ TIFFTAG_BLACKLEVELDELTAV, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "BlackLevelDeltaV", NULL },
	{ TIFFTAG_WHITELEVEL, -1, -1, TIFF_LONG, 0, TIFF_SETGET_C16_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "WhiteLevel", NULL },
	{ TIFFTAG_DEFAULTSCALE, 2, 2, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "DefaultScale", NULL },
	{ TIFFTAG_BESTQUALITYSCALE, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "BestQualityScale", NULL },
	{ TIFFTAG_DEFAULTCROPORIGIN, 2, 2, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "DefaultCropOrigin", NULL },
	{ TIFFTAG_DEFAULTCROPSIZE, 2, 2, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "DefaultCropSize", NULL },
	{ TIFFTAG_COLORMATRIX1, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "ColorMatrix1", NULL },
	{ TIFFTAG_COLORMATRIX2, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "ColorMatrix2", NULL },
	{ TIFFTAG_CAMERACALIBRATION1, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "CameraCalibration1", NULL },
	{ TIFFTAG_CAMERACALIBRATION2, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "CameraCalibration2", NULL },
	{ TIFFTAG_REDUCTIONMATRIX1, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "ReductionMatrix1", NULL },
	{ TIFFTAG_REDUCTIONMATRIX2, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "ReductionMatrix2", NULL },
	{ TIFFTAG_ANALOGBALANCE, -1, -1, TIFF_RATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "AnalogBalance", NULL },
	{ TIFFTAG_ASSHOTNEUTRAL, -1, -1, TIFF_RATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "AsShotNeutral", NULL },
	{ TIFFTAG_ASSHOTWHITEXY, 2, 2, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "AsShotWhiteXY", NULL },
	{ TIFFTAG_BASELINEEXPOSURE, 1, 1, TIFF_SRATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "BaselineExposure", NULL },
	{ TIFFTAG_BASELINENOISE, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "BaselineNoise", NULL },
	{ TIFFTAG_BASELINESHARPNESS, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "BaselineSharpness", NULL },
	{ TIFFTAG_BAYERGREENSPLIT, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "BayerGreenSplit", NULL },
	{ TIFFTAG_LINEARRESPONSELIMIT, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "LinearResponseLimit", NULL },
	{ TIFFTAG_CAMERASERIALNUMBER, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "CameraSerialNumber", NULL },
	{ TIFFTAG_LENSINFO, 4, 4, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "LensInfo", NULL },
	{ TIFFTAG_CHROMABLURRADIUS, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "ChromaBlurRadius", NULL },
	{ TIFFTAG_ANTIALIASSTRENGTH, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "AntiAliasStrength", NULL },
	{ TIFFTAG_SHADOWSCALE, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "ShadowScale", NULL },
	{ TIFFTAG_DNGPRIVATEDATA, -1, -1, TIFF_BYTE, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "DNGPrivateData", NULL },
	{ TIFFTAG_MAKERNOTESAFETY, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "MakerNoteSafety", NULL },
	{ TIFFTAG_CALIBRATIONILLUMINANT1, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "CalibrationIlluminant1", NULL },
	{ TIFFTAG_CALIBRATIONILLUMINANT2, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "CalibrationIlluminant2", NULL },
	{ TIFFTAG_RAWDATAUNIQUEID, 16, 16, TIFF_BYTE, 0, TIFF_SETGET_C0_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "RawDataUniqueID", NULL },
	{ TIFFTAG_ORIGINALRAWFILENAME, -1, -1, TIFF_BYTE, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "OriginalRawFileName", NULL },
	{ TIFFTAG_ORIGINALRAWFILEDATA, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "OriginalRawFileData", NULL },
	{ TIFFTAG_ACTIVEAREA, 4, 4, TIFF_LONG, 0, TIFF_SETGET_C0_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "ActiveArea", NULL },
	{ TIFFTAG_MASKEDAREAS, -1, -1, TIFF_LONG, 0, TIFF_SETGET_C16_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "MaskedAreas", NULL },
	{ TIFFTAG_ASSHOTICCPROFILE, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "AsShotICCProfile", NULL },
	{ TIFFTAG_ASSHOTPREPROFILEMATRIX, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "AsShotPreProfileMatrix", NULL },
	{ TIFFTAG_CURRENTICCPROFILE, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "CurrentICCProfile", NULL },
	{ TIFFTAG_CURRENTPREPROFILEMATRIX, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "CurrentPreProfileMatrix", NULL },
	{ TIFFTAG_PERSAMPLE, 0, 0, TIFF_SHORT, 0, TIFF_SETGET_UNDEFINED, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, TRUE, FALSE, "PerSample", NULL},
	/* end DNG tags */
	/* begin TIFF/FX tags */
        { TIFFTAG_INDEXED, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "Indexed", NULL },
        { TIFFTAG_GLOBALPARAMETERSIFD, 1, 1, TIFF_IFD8, 0, TIFF_SETGET_IFD8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "GlobalParametersIFD", NULL },
        { TIFFTAG_PROFILETYPE, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "ProfileType", NULL },
        { TIFFTAG_FAXPROFILE, 1, 1, TIFF_BYTE, 0, TIFF_SETGET_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "FaxProfile", NULL },
        { TIFFTAG_CODINGMETHODS, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "CodingMethods", NULL },
        { TIFFTAG_VERSIONYEAR, 4, 4, TIFF_BYTE, 0, TIFF_SETGET_C0_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "VersionYear", NULL },
        { TIFFTAG_MODENUMBER, 1, 1, TIFF_BYTE, 0, TIFF_SETGET_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "ModeNumber", NULL },
        { TIFFTAG_DECODE, -1, -1, TIFF_SRATIONAL, 0, TIFF_SETGET_C16_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "Decode", NULL },
        { TIFFTAG_IMAGEBASECOLOR, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_C16_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "ImageBaseColor", NULL },
        { TIFFTAG_T82OPTIONS, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "T82Options", NULL },
        { TIFFTAG_STRIPROWCOUNTS, -1, -1, TIFF_LONG, 0, TIFF_SETGET_C16_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 1, "StripRowCounts", NULL },
        { TIFFTAG_IMAGELAYER, 2, 2, TIFF_LONG, 0, TIFF_SETGET_C0_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "ImageLayer", NULL },
	/* end TIFF/FX tags */
	/* begin pseudo tags */
};

/*
 * EXIF tags  (Version 2.31, July 2016 plus version 2.32 May 2019)
 */
static const TIFFField
exifFields[] = {
	{ EXIFTAG_EXPOSURETIME, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ExposureTime", NULL },
	{ EXIFTAG_FNUMBER, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FNumber", NULL },
	{ EXIFTAG_EXPOSUREPROGRAM, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ExposureProgram", NULL },
	{ EXIFTAG_SPECTRALSENSITIVITY, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SpectralSensitivity", NULL },
	{ EXIFTAG_ISOSPEEDRATINGS, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_C16_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "ISOSpeedRatings", NULL },
	{ EXIFTAG_OECF, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "OptoelectricConversionFactor", NULL },
	{ EXIFTAG_SENSITIVITYTYPE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SensitivityType", NULL },
	{ EXIFTAG_STANDARDOUTPUTSENSITIVITY, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "StandardOutputSensitivity", NULL },
	{ EXIFTAG_RECOMMENDEDEXPOSUREINDEX, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "RecommendedExposureIndex", NULL },
	{ EXIFTAG_ISOSPEED, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ISOSpeed", NULL },
	{ EXIFTAG_ISOSPEEDLATITUDEYYY, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ISOSpeedLatitudeyyy", NULL },
	{ EXIFTAG_ISOSPEEDLATITUDEZZZ, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ISOSpeedLatitudezzz", NULL },
	{ EXIFTAG_EXIFVERSION, 4, 4, TIFF_UNDEFINED, 0, TIFF_SETGET_C0_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ExifVersion", NULL },
	{ EXIFTAG_DATETIMEORIGINAL, 20, 20, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "DateTimeOriginal", NULL },
	{ EXIFTAG_DATETIMEDIGITIZED, 20, 20, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "DateTimeDigitized", NULL },
	{ EXIFTAG_OFFSETTIME, 7, 7, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "OffsetTime", NULL },
	{ EXIFTAG_OFFSETTIMEORIGINAL, 7, 7, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "OffsetTimeOriginal", NULL },
	{ EXIFTAG_OFFSETTIMEDIGITIZED, 7, 7, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "OffsetTimeDigitized", NULL },
	{ EXIFTAG_COMPONENTSCONFIGURATION, 4, 4, TIFF_UNDEFINED, 0, TIFF_SETGET_C0_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ComponentsConfiguration", NULL },
	{ EXIFTAG_COMPRESSEDBITSPERPIXEL, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "CompressedBitsPerPixel", NULL },
	{ EXIFTAG_SHUTTERSPEEDVALUE, 1, 1, TIFF_SRATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ShutterSpeedValue", NULL },
	{ EXIFTAG_APERTUREVALUE, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ApertureValue", NULL },
	{ EXIFTAG_BRIGHTNESSVALUE, 1, 1, TIFF_SRATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "BrightnessValue", NULL },
	{ EXIFTAG_EXPOSUREBIASVALUE, 1, 1, TIFF_SRATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ExposureBiasValue", NULL },
	{ EXIFTAG_MAXAPERTUREVALUE, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "MaxApertureValue", NULL },
	/*--: EXIFTAG_SUBJECTDISTANCE: LibTiff returns value of "-1" if numerator equals 4294967295 (0xFFFFFFFF) to indicate infinite distance!
	 * However, there are two other EXIF tags where numerator indicates a special value and six other cases where the denominator indicates special values,
	 * which are not treated within LibTiff!! */
	{ EXIFTAG_SUBJECTDISTANCE, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SubjectDistance", NULL },
	{ EXIFTAG_METERINGMODE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "MeteringMode", NULL },
	{ EXIFTAG_LIGHTSOURCE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "LightSource", NULL },
	{ EXIFTAG_FLASH, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Flash", NULL },
	{ EXIFTAG_FOCALLENGTH, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FocalLength", NULL },
	{ EXIFTAG_SUBJECTAREA, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_C16_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "SubjectArea", NULL },
	{ EXIFTAG_MAKERNOTE, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "MakerNote", NULL },
	{ EXIFTAG_USERCOMMENT, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "UserComment", NULL },
	{ EXIFTAG_SUBSECTIME, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SubSecTime", NULL },
	{ EXIFTAG_SUBSECTIMEORIGINAL, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SubSecTimeOriginal", NULL },
	{ EXIFTAG_SUBSECTIMEDIGITIZED, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SubSecTimeDigitized", NULL },
	{ EXIFTAG_TEMPERATURE, 1, 1, TIFF_SRATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Temperature", NULL },
	{ EXIFTAG_HUMIDITY, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Humidity", NULL },
	{ EXIFTAG_PRESSURE, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Pressure", NULL },
	{ EXIFTAG_WATERDEPTH, 1, 1, TIFF_SRATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "WaterDepth", NULL },
	{ EXIFTAG_ACCELERATION, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Acceleration", NULL },
	{ EXIFTAG_CAMERAELEVATIONANGLE, 1, 1, TIFF_SRATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "CameraElevationAngle", NULL },
	{ EXIFTAG_FLASHPIXVERSION, 4, 4, TIFF_UNDEFINED, 0, TIFF_SETGET_C0_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FlashpixVersion", NULL },
	{ EXIFTAG_COLORSPACE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ColorSpace", NULL },
	{ EXIFTAG_PIXELXDIMENSION, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "PixelXDimension", NULL },
	{ EXIFTAG_PIXELYDIMENSION, 1, 1, TIFF_LONG, 0, TIFF_SETGET_UINT32, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "PixelYDimension", NULL },
	{ EXIFTAG_RELATEDSOUNDFILE, 13, 13, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "RelatedSoundFile", NULL },
	{ EXIFTAG_FLASHENERGY, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FlashEnergy", NULL },
	{ EXIFTAG_SPATIALFREQUENCYRESPONSE, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "SpatialFrequencyResponse", NULL },
	{ EXIFTAG_FOCALPLANEXRESOLUTION, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FocalPlaneXResolution", NULL },
	{ EXIFTAG_FOCALPLANEYRESOLUTION, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FocalPlaneYResolution", NULL },
	{ EXIFTAG_FOCALPLANERESOLUTIONUNIT, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FocalPlaneResolutionUnit", NULL },
	{ EXIFTAG_SUBJECTLOCATION, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_C0_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SubjectLocation", NULL },
	{ EXIFTAG_EXPOSUREINDEX, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ExposureIndex", NULL },
	{ EXIFTAG_SENSINGMETHOD, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SensingMethod", NULL },
	{ EXIFTAG_FILESOURCE, 1, 1, TIFF_UNDEFINED, 0, TIFF_SETGET_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FileSource", NULL },
	{ EXIFTAG_SCENETYPE, 1, 1, TIFF_UNDEFINED, 0, TIFF_SETGET_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SceneType", NULL },
	{ EXIFTAG_CFAPATTERN, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "CFAPattern", NULL },
	{ EXIFTAG_CUSTOMRENDERED, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "CustomRendered", NULL },
	{ EXIFTAG_EXPOSUREMODE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ExposureMode", NULL },
	{ EXIFTAG_WHITEBALANCE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "WhiteBalance", NULL },
	{ EXIFTAG_DIGITALZOOMRATIO, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "DigitalZoomRatio", NULL },
	{ EXIFTAG_FOCALLENGTHIN35MMFILM, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "FocalLengthIn35mmFilm", NULL },
	{ EXIFTAG_SCENECAPTURETYPE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SceneCaptureType", NULL },
	{ EXIFTAG_GAINCONTROL, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "GainControl", NULL },
	{ EXIFTAG_CONTRAST, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Contrast", NULL },
	{ EXIFTAG_SATURATION, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Saturation", NULL },
	{ EXIFTAG_SHARPNESS, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Sharpness", NULL },
	{ EXIFTAG_DEVICESETTINGDESCRIPTION, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "DeviceSettingDescription", NULL },
	{ EXIFTAG_SUBJECTDISTANCERANGE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SubjectDistanceRange", NULL },
	{ EXIFTAG_IMAGEUNIQUEID, 33, 33, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "ImageUniqueID", NULL },
	{ EXIFTAG_CAMERAOWNERNAME, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "CameraOwnerName", NULL },
	{ EXIFTAG_BODYSERIALNUMBER, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "BodySerialNumber", NULL },
	{ EXIFTAG_LENSSPECIFICATION, 4, 4, TIFF_RATIONAL, 0, TIFF_SETGET_C0_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "LensSpecification", NULL },
	{ EXIFTAG_LENSMAKE, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "LensMake", NULL },
	{ EXIFTAG_LENSMODEL, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "LensModel", NULL },
	{ EXIFTAG_LENSSERIALNUMBER, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "LensSerialNumber", NULL },
	{ EXIFTAG_GAMMA, 1, 1, TIFF_RATIONAL, 0, TIFF_SETGET_FLOAT, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "Gamma", NULL },
	{ EXIFTAG_COMPOSITEIMAGE, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "CompositeImage", NULL },
	{ EXIFTAG_SOURCEIMAGENUMBEROFCOMPOSITEIMAGE, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_C0_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "SourceImageNumberOfCompositeImage", NULL },
	{ EXIFTAG_SOURCEEXPOSURETIMESOFCOMPOSITEIMAGE, -1, -1, TIFF_UNDEFINED, 0, TIFF_SETGET_C16_UINT8, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 1, "SourceExposureTimesOfCompositeImage", NULL }
};
/*
 * EXIF-GPS tags  (Version 2.31, July 2016; nothing changed for version 2.32 May 2019)
 */

static const TIFFField
gpsFields[] = {
	/*  For the GPS tag definitions in gpsFields[] the standard definition for Rationals is TIFF_SETGET_DOUBLE and TIFF_SETGET_C0_FLOAT.
	 *-- ATTENTION: After the upgrade with Rational2Double, the GPSTAG values can now be written and also read in double precision!
	 *              In order to achieve double precision for GPS tags:
	 *              Standard definitions for GPSTAG is kept to TIFF_SETGET_DOUBLE 
	 *              and TIFF_SETGET_C0_FLOAT is changed to TIFF_SETGET_C0_DOUBLE.
	 */
	{		GPSTAG_VERSIONID	, 4, 4, 	TIFF_BYTE	, 0, 	TIFF_SETGET_C0_UINT8	, TIFF_SETGET_UINT8	, FIELD_CUSTOM	, 1, 0, 	"VersionID", NULL },
	{		GPSTAG_LATITUDEREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"LatitudeRef", NULL },
	{		GPSTAG_LATITUDE	, 3, 3,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_C0_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Latitude", NULL },
	{		GPSTAG_LONGITUDEREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"LongitudeRef", NULL },
	{		GPSTAG_LONGITUDE	, 3, 3,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_C0_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Longitude", NULL },
	{		GPSTAG_ALTITUDEREF	, 1, 1,	TIFF_BYTE	, 0, 	TIFF_SETGET_UINT8	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"AltitudeRef", NULL },
	{		GPSTAG_ALTITUDE	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Altitude", NULL },
	{		GPSTAG_TIMESTAMP	, 3, 3,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_C0_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"TimeStamp", NULL },
	{		GPSTAG_SATELLITES	, -1, -1,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Satellites", NULL },
	{		GPSTAG_STATUS	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Status", NULL },
	{		GPSTAG_MEASUREMODE	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"MeasureMode", NULL },
	{		GPSTAG_DOP	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DOP", NULL },
	{		GPSTAG_SPEEDREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"SpeedRef", NULL },
	{		GPSTAG_SPEED	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Speed", NULL },
	{		GPSTAG_TRACKREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"TrackRef", NULL },
	{		GPSTAG_TRACK	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Track", NULL },
	{		GPSTAG_IMGDIRECTIONREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"ImgDirectionRef", NULL },
	{		GPSTAG_IMGDIRECTION	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"ImgDirection", NULL },
	{		GPSTAG_MAPDATUM	, -1, -1,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"MapDatum", NULL },
	{		GPSTAG_DESTLATITUDEREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestLatitudeRef", NULL },
	{		GPSTAG_DESTLATITUDE	, 3, 3,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_C0_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestLatitude", NULL },
	{		GPSTAG_DESTLONGITUDEREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestLongitudeRef", NULL },
	{		GPSTAG_DESTLONGITUDE	, 3, 3,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_C0_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestLongitude", NULL },
	{		GPSTAG_DESTBEARINGREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestBearingRef", NULL },
	{		GPSTAG_DESTBEARING	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestBearing", NULL },
	{		GPSTAG_DESTDISTANCEREF	, 2, 2,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestDistanceRef", NULL },
	{		GPSTAG_DESTDISTANCE	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DestDistance", NULL },
	{		GPSTAG_PROCESSINGMETHOD	, -1, -1,	TIFF_UNDEFINED	, 0, 	TIFF_SETGET_C16_UINT8	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 1, 	"ProcessingMethod", NULL },
	{		GPSTAG_AREAINFORMATION	, -1, -1,	TIFF_UNDEFINED	, 0, 	TIFF_SETGET_C16_UINT8	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 1, 	"AreaInformation", NULL },
	{		GPSTAG_DATESTAMP	, 11, 11,	TIFF_ASCII	, 0, 	TIFF_SETGET_ASCII	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"DateStamp", NULL },
	{		GPSTAG_DIFFERENTIAL	, 1, 1,	TIFF_SHORT	, 0, 	TIFF_SETGET_UINT16	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"Differential", NULL },
	{		GPSTAG_GPSHPOSITIONINGERROR	, 1, 1,	TIFF_RATIONAL	, 0, 	TIFF_SETGET_DOUBLE	, TIFF_SETGET_UNDEFINED	, FIELD_CUSTOM	, 1, 0, 	"HorizontalPositioningError", NULL }
};

static const TIFFFieldArray
tiffFieldArray = { tfiatImage, 0, TIFFArrayCount(tiffFields), (TIFFField*) tiffFields };
static const TIFFFieldArray
exifFieldArray = { tfiatExif, 0, TIFFArrayCount(exifFields), (TIFFField*) exifFields };
static const TIFFFieldArray
gpsFieldArray = { tfiatGps, 0, TIFFArrayCount(gpsFields), (TIFFField*) gpsFields };

/*
 *  We have our own local lfind() equivalent to avoid subtle differences
 *  in types passed to lfind() on different systems. 
 */

static void *
td_lfind(const void *key, const void *base, size_t *nmemb, size_t size,
         int(*compar)(const void *, const void *))
{
    char *element, *end;

    end = (char *)base + *nmemb * size;
    for (element = (char *)base; element < end; element += size)
        if (!compar(key, element))		/* key found */
            return element;

    return NULL;
}

const TIFFFieldArray*
_TIFFGetFields(void)
{
	return(&tiffFieldArray);
}

const TIFFFieldArray*
_TIFFGetExifFields(void)
{
	return(&exifFieldArray);
}

const TIFFFieldArray*
_TIFFGetGpsFields(void)
{
	return(&gpsFieldArray);
}

void
_TIFFSetupFields(TIFF* tif, const TIFFFieldArray* fieldarray)
{
	if (tif->tif_fields && tif->tif_nfields > 0) {
		uint32_t i;

		for (i = 0; i < tif->tif_nfields; i++) {
			TIFFField *fld = tif->tif_fields[i];
			if (fld->field_name != NULL) {
				if (fld->field_bit == FIELD_CUSTOM &&
					TIFFFieldIsAnonymous(fld)) {
					_TIFFfree(fld->field_name);
					/* caution: tif_fields[i] must not be the beginning of a fields-array. 
					 *          Otherwise the following tags are also freed with the first free().
					 */
					_TIFFfree(fld);
				}
			}
		}

		_TIFFfree(tif->tif_fields);
		tif->tif_fields = NULL;
		tif->tif_nfields = 0;
	}
	if (!_TIFFMergeFields(tif, fieldarray->fields, fieldarray->count)) {
		TIFFErrorExt(tif->tif_clientdata, "_TIFFSetupFields",
			     "Setting up field info failed");
	}
}

static int
tagCompare(const void* a, const void* b)
{
	const TIFFField* ta = *(const TIFFField**) a;
	const TIFFField* tb = *(const TIFFField**) b;
	/* NB: be careful of return values for 16-bit platforms */
	if (ta->field_tag != tb->field_tag)
		return (int)ta->field_tag - (int)tb->field_tag;
	else
		return (ta->field_type == TIFF_ANY) ?
			0 : ((int)tb->field_type - (int)ta->field_type);
}

static int
tagNameCompare(const void* a, const void* b)
{
	const TIFFField* ta = *(const TIFFField**) a;
	const TIFFField* tb = *(const TIFFField**) b;
	int ret = strcmp(ta->field_name, tb->field_name);

	if (ret)
		return ret;
	else
		return (ta->field_type == TIFF_ANY) ?
			0 : ((int)tb->field_type - (int)ta->field_type);
}

int
_TIFFMergeFields(TIFF* tif, const TIFFField info[], uint32_t n)
{
	static const char module[] = "_TIFFMergeFields";
	static const char reason[] = "for fields array";
	/* TIFFField** tp; */
	uint32_t i;

        tif->tif_foundfield = NULL;

	if (tif->tif_fields && tif->tif_nfields > 0) {
		tif->tif_fields = (TIFFField**)
			_TIFFCheckRealloc(tif, tif->tif_fields,
					  (tif->tif_nfields + n),
					  sizeof(TIFFField *), reason);
	} else {
		tif->tif_fields = (TIFFField **)
			_TIFFCheckMalloc(tif, n, sizeof(TIFFField *),
					 reason);
	}
	if (!tif->tif_fields) {
		TIFFErrorExt(tif->tif_clientdata, module,
			     "Failed to allocate fields array");
		return 0;
	}

	/* tp = tif->tif_fields + tif->tif_nfields; */
	for (i = 0; i < n; i++) {
		const TIFFField *fip =
			TIFFFindField(tif, info[i].field_tag, TIFF_ANY);

                /* only add definitions that aren't already present */
		if (!fip) {
                        tif->tif_fields[tif->tif_nfields] = (TIFFField *) (info+i);
                        tif->tif_nfields++;
                }
	}

        /* Sort the field info by tag number */
	qsort(tif->tif_fields, tif->tif_nfields,
	      sizeof(TIFFField *), tagCompare);

	return n;
}

void
_TIFFPrintFieldInfo(TIFF* tif, FILE* fd)
{
	uint32_t i;

	fprintf(fd, "%s: \n", tif->tif_name);
	for (i = 0; i < tif->tif_nfields; i++) {
		const TIFFField* fip = tif->tif_fields[i];
		fprintf(fd, "field[%2d] %5lu, %2d, %2d, %d, %2d, %5s, %5s, %s\n"
			, (int)i
			, (unsigned long) fip->field_tag
			, fip->field_readcount, fip->field_writecount
			, fip->field_type
			, fip->field_bit
			, fip->field_oktochange ? "TRUE" : "FALSE"
			, fip->field_passcount ? "TRUE" : "FALSE"
			, fip->field_name
		);
	}
}

/*
 * Return size of TIFFDataType within TIFF-file in bytes
 */
int
TIFFDataWidth(TIFFDataType type)
{
	switch(type)
	{
		case 0:  /* nothing */
		case TIFF_BYTE:
		case TIFF_ASCII:
		case TIFF_SBYTE:
		case TIFF_UNDEFINED:
			return 1;
		case TIFF_SHORT:
		case TIFF_SSHORT:
			return 2;
		case TIFF_LONG:
		case TIFF_SLONG:
		case TIFF_FLOAT:
		case TIFF_IFD:
			return 4;
		case TIFF_RATIONAL:
		case TIFF_SRATIONAL:
		case TIFF_DOUBLE:
		case TIFF_LONG8:
		case TIFF_SLONG8:
		case TIFF_IFD8:
			return 8;
		default:
			return 0; /* will return 0 for unknown types */
	}
}


/* 
 * Return internal storage size of TIFFSetGetFieldType in bytes.
 * TIFFSetField() and TIFFGetField() have to provide the parameter accordingly.
 * Replaces internal functions _TIFFDataSize() and _TIFFSetGetFieldSize() 
 * with now extern available function TIFFFieldSetGetSize().
 */
int 
TIFFFieldSetGetSize(const TIFFField* fip)
{
/*
 * TIFFSetField() and TIFFGetField() must provide the parameter accordingly to
 * the definition of "set_field_type" of the tag definition in dir_info.c.
 * This function returns the data size for that purpose.
 * 
 * Furthermore, this data size is also used for the internal storage,
 * even for TIFF_RATIONAL values for FIELD_CUSTOM, which are stored internally as 4-byte float,
 * but some of them should be stored internally as 8-byte double,
 * depending on the "set_field_type" _FLOAT_ or _DOUBLE_.
*/
	if (fip == NULL) return 0;

	switch (fip->set_field_type)
	{
		case TIFF_SETGET_UNDEFINED:
		case TIFF_SETGET_ASCII:
		case TIFF_SETGET_C0_ASCII:
		case TIFF_SETGET_C16_ASCII:
		case TIFF_SETGET_C32_ASCII:
		case TIFF_SETGET_OTHER:
		    return 1;
		case TIFF_SETGET_UINT8:
		case TIFF_SETGET_SINT8:
		case TIFF_SETGET_C0_UINT8:
		case TIFF_SETGET_C0_SINT8:
		case TIFF_SETGET_C16_UINT8:
		case TIFF_SETGET_C16_SINT8:
		case TIFF_SETGET_C32_UINT8:
		case TIFF_SETGET_C32_SINT8:
		    return 1;
		case TIFF_SETGET_UINT16:
		case TIFF_SETGET_SINT16:
		case TIFF_SETGET_C0_UINT16:
		case TIFF_SETGET_C0_SINT16:
		case TIFF_SETGET_C16_UINT16:
		case TIFF_SETGET_C16_SINT16:
		case TIFF_SETGET_C32_UINT16:
		case TIFF_SETGET_C32_SINT16:
		    return 2;
		case TIFF_SETGET_INT:
		case TIFF_SETGET_UINT32:
		case TIFF_SETGET_SINT32:
		case TIFF_SETGET_FLOAT:
		case TIFF_SETGET_UINT16_PAIR:
		case TIFF_SETGET_C0_UINT32:
		case TIFF_SETGET_C0_SINT32:
		case TIFF_SETGET_C0_FLOAT:
		case TIFF_SETGET_C16_UINT32:
		case TIFF_SETGET_C16_SINT32:
		case TIFF_SETGET_C16_FLOAT:
		case TIFF_SETGET_C32_UINT32:
		case TIFF_SETGET_C32_SINT32:
		case TIFF_SETGET_C32_FLOAT:
		    return 4;
		case TIFF_SETGET_UINT64:
		case TIFF_SETGET_SINT64:
		case TIFF_SETGET_DOUBLE:
		case TIFF_SETGET_IFD8:
		case TIFF_SETGET_C0_UINT64:
		case TIFF_SETGET_C0_SINT64:
		case TIFF_SETGET_C0_DOUBLE:
		case TIFF_SETGET_C0_IFD8:
		case TIFF_SETGET_C16_UINT64:
		case TIFF_SETGET_C16_SINT64:
		case TIFF_SETGET_C16_DOUBLE:
		case TIFF_SETGET_C16_IFD8:
		case TIFF_SETGET_C32_UINT64:
		case TIFF_SETGET_C32_SINT64:
		case TIFF_SETGET_C32_DOUBLE:
		case TIFF_SETGET_C32_IFD8:
		    return 8;
		default:
		    return 0;
	}
} /*-- TIFFFieldSetGetSize() --- */

/*
 * Return size of count parameter of TIFFSetField() and TIFFGetField()
 * and also if it is required:  0=none, 2=uint16_t, 4=uint32_t 
 */
int
TIFFFieldSetGetCountSize(const TIFFField* fip)
{
	if (fip == NULL) return 0;

	switch (fip->set_field_type) {
		case TIFF_SETGET_C16_ASCII:
		case TIFF_SETGET_C16_UINT8:
		case TIFF_SETGET_C16_SINT8:
		case TIFF_SETGET_C16_UINT16:
		case TIFF_SETGET_C16_SINT16:
		case TIFF_SETGET_C16_UINT32:
		case TIFF_SETGET_C16_SINT32:
		case TIFF_SETGET_C16_FLOAT:
		case TIFF_SETGET_C16_UINT64:
		case TIFF_SETGET_C16_SINT64:
		case TIFF_SETGET_C16_DOUBLE:
		case TIFF_SETGET_C16_IFD8:
			return 2;
		case TIFF_SETGET_C32_ASCII:
		case TIFF_SETGET_C32_UINT8:
		case TIFF_SETGET_C32_SINT8:
		case TIFF_SETGET_C32_UINT16:
		case TIFF_SETGET_C32_SINT16:
		case TIFF_SETGET_C32_UINT32:
		case TIFF_SETGET_C32_SINT32:
		case TIFF_SETGET_C32_FLOAT:
		case TIFF_SETGET_C32_UINT64:
		case TIFF_SETGET_C32_SINT64:
		case TIFF_SETGET_C32_DOUBLE:
		case TIFF_SETGET_C32_IFD8:
			return 4;
		default:
			return 0;
	}
} /*-- TIFFFieldSetGetCountSize() --- */


const TIFFField*
TIFFFindField(TIFF* tif, uint32_t tag, TIFFDataType dt)
{
	TIFFField key = {0, 0, 0, TIFF_NOTYPE, 0, 0, 0, 0, 0, 0, NULL, NULL};
	TIFFField* pkey = &key;
	const TIFFField **ret;
	if (tif->tif_foundfield && tif->tif_foundfield->field_tag == tag &&
	    (dt == TIFF_ANY || dt == tif->tif_foundfield->field_type))
		return tif->tif_foundfield;

	/* If we are invoked with no field information, then just return. */
	if (!tif->tif_fields)
		return NULL;

	/* NB: use sorted search (e.g. binary search) */

	key.field_tag = tag;
	key.field_type = dt;

	ret = (const TIFFField **) bsearch(&pkey, tif->tif_fields,
					   tif->tif_nfields,
					   sizeof(TIFFField *), tagCompare);
	return tif->tif_foundfield = (ret ? *ret : NULL);
}

static const TIFFField*
_TIFFFindFieldByName(TIFF* tif, const char *field_name, TIFFDataType dt)
{
	TIFFField key = {0, 0, 0, TIFF_NOTYPE, 0, 0, 0, 0, 0, 0, NULL, NULL};
	TIFFField* pkey = &key;
	const TIFFField **ret;
	if (tif->tif_foundfield
	    && streq(tif->tif_foundfield->field_name, field_name)
	    && (dt == TIFF_ANY || dt == tif->tif_foundfield->field_type))
		return (tif->tif_foundfield);

	/* If we are invoked with no field information, then just return. */
	if (!tif->tif_fields)
		return NULL;

	/* NB: use linear search since list is sorted by key#, not name */

	key.field_name = (char *)field_name;
	key.field_type = dt;

	ret = (const TIFFField **) 
            td_lfind(&pkey, tif->tif_fields, &tif->tif_nfields,
                     sizeof(TIFFField *), tagNameCompare);

	return tif->tif_foundfield = (ret ? *ret : NULL);
}

const TIFFField*
TIFFFieldWithTag(TIFF* tif, uint32_t tag)
{
	const TIFFField* fip = TIFFFindField(tif, tag, TIFF_ANY);
	if (!fip) {
		TIFFErrorExt(tif->tif_clientdata, "TIFFFieldWithTag",
			     "Internal error, unknown tag 0x%x",
			     (unsigned int) tag);
	}
	return (fip);
}

const TIFFField*
TIFFFieldWithName(TIFF* tif, const char *field_name)
{
	const TIFFField* fip =
		_TIFFFindFieldByName(tif, field_name, TIFF_ANY);
	if (!fip) {
		TIFFErrorExt(tif->tif_clientdata, "TIFFFieldWithName",
			     "Internal error, unknown tag %s", field_name);
	}
	return (fip);
}

uint32_t
TIFFFieldTag(const TIFFField* fip)
{
	return fip->field_tag;
}

const char *
TIFFFieldName(const TIFFField* fip)
{
	return fip->field_name;
}

TIFFDataType
TIFFFieldDataType(const TIFFField* fip)
{
	return fip->field_type;
}

int
TIFFFieldPassCount(const TIFFField* fip)
{
	return fip->field_passcount;
}

int
TIFFFieldReadCount(const TIFFField* fip)
{
	return fip->field_readcount;
}

int
TIFFFieldWriteCount(const TIFFField* fip)
{
	return fip->field_writecount;
}

int
TIFFFieldIsAnonymous(const TIFFField *fip)
{
	return fip->field_anonymous;
}

const TIFFField*
_TIFFFindOrRegisterField(TIFF *tif, uint32_t tag, TIFFDataType dt)

{
	const TIFFField *fld;

	fld = TIFFFindField(tif, tag, dt);
	if (fld == NULL) {
		fld = _TIFFCreateAnonField(tif, tag, dt);
		if (!_TIFFMergeFields(tif, fld, 1))
			return NULL;
	}

	return fld;
}

TIFFField*
_TIFFCreateAnonField(TIFF *tif, uint32_t tag, TIFFDataType field_type)
{
	TIFFField *fld;
	(void) tif;

	fld = (TIFFField *) _TIFFmalloc(sizeof (TIFFField));
	if (fld == NULL)
	    return NULL;
	_TIFFmemset(fld, 0, sizeof(TIFFField));

	fld->field_tag = tag;
	fld->field_readcount = TIFF_VARIABLE2;
	fld->field_writecount = TIFF_VARIABLE2;
	fld->field_type = field_type;
	fld->field_anonymous = 1;    /* indicate that this is an anonymous / unknown tag */
	switch (field_type)
	{
		case TIFF_BYTE:
		case TIFF_UNDEFINED:
			fld->set_field_type = TIFF_SETGET_C32_UINT8;
			fld->get_field_type = TIFF_SETGET_C32_UINT8;
			break;
		case TIFF_ASCII:
			fld->set_field_type = TIFF_SETGET_C32_ASCII;
			fld->get_field_type = TIFF_SETGET_C32_ASCII;
			break;
		case TIFF_SHORT:
			fld->set_field_type = TIFF_SETGET_C32_UINT16;
			fld->get_field_type = TIFF_SETGET_C32_UINT16;
			break;
		case TIFF_LONG:
			fld->set_field_type = TIFF_SETGET_C32_UINT32;
			fld->get_field_type = TIFF_SETGET_C32_UINT32;
			break;
		case TIFF_RATIONAL:
		case TIFF_SRATIONAL:
		case TIFF_FLOAT:
			fld->set_field_type = TIFF_SETGET_C32_FLOAT;
			fld->get_field_type = TIFF_SETGET_C32_FLOAT;
			break;
		case TIFF_SBYTE:
			fld->set_field_type = TIFF_SETGET_C32_SINT8;
			fld->get_field_type = TIFF_SETGET_C32_SINT8;
			break;
		case TIFF_SSHORT:
			fld->set_field_type = TIFF_SETGET_C32_SINT16;
			fld->get_field_type = TIFF_SETGET_C32_SINT16;
			break;
		case TIFF_SLONG:
			fld->set_field_type = TIFF_SETGET_C32_SINT32;
			fld->get_field_type = TIFF_SETGET_C32_SINT32;
			break;
		case TIFF_DOUBLE:
			fld->set_field_type = TIFF_SETGET_C32_DOUBLE;
			fld->get_field_type = TIFF_SETGET_C32_DOUBLE;
			break;
		case TIFF_IFD:
		case TIFF_IFD8:
			fld->set_field_type = TIFF_SETGET_C32_IFD8;
			fld->get_field_type = TIFF_SETGET_C32_IFD8;
			break;
		case TIFF_LONG8:
			fld->set_field_type = TIFF_SETGET_C32_UINT64;
			fld->get_field_type = TIFF_SETGET_C32_UINT64;
			break;
		case TIFF_SLONG8:
			fld->set_field_type = TIFF_SETGET_C32_SINT64;
			fld->get_field_type = TIFF_SETGET_C32_SINT64;
			break;
		default:
			fld->set_field_type = TIFF_SETGET_UNDEFINED;
			fld->get_field_type = TIFF_SETGET_UNDEFINED;
			break;
	}
	fld->field_bit = FIELD_CUSTOM;
	fld->field_oktochange = TRUE;
	fld->field_passcount = TRUE;
	fld->field_name = (char *) _TIFFmalloc(32);
	if (fld->field_name == NULL) {
	    _TIFFfree(fld);
	    return NULL;
	}
	fld->field_subfields = NULL;

	/* 
	 * note that this name is a special sign to TIFFClose() and
	 * _TIFFSetupFields() to free the field
	 * Update:
	 *   This special sign is replaced by fld->field_anonymous  flag.
	 */
	(void) snprintf(fld->field_name, 32, "Tag %d", (int) tag);

	return fld;    
}

/****************************************************************************
 *               O B S O L E T E D    I N T E R F A C E S
 *
 * Don't use this stuff in your applications, it may be removed in the future
 * libtiff versions.
 ****************************************************************************/

static TIFFSetGetFieldType
_TIFFSetGetType(TIFFDataType type, short count, unsigned char passcount)
{
	if (type == TIFF_ASCII && count == TIFF_VARIABLE && passcount == 0)
		return TIFF_SETGET_ASCII;

	else if (count == 1 && passcount == 0) {
		switch (type)
		{
			case TIFF_BYTE:
			case TIFF_UNDEFINED:
				return TIFF_SETGET_UINT8;
			case TIFF_ASCII:
				return TIFF_SETGET_ASCII;
			case TIFF_SHORT:
				return TIFF_SETGET_UINT16;
			case TIFF_LONG:
				return TIFF_SETGET_UINT32;
			case TIFF_RATIONAL:
			case TIFF_SRATIONAL:
			case TIFF_FLOAT:
				return TIFF_SETGET_FLOAT;
			case TIFF_SBYTE:
				return TIFF_SETGET_SINT8;
			case TIFF_SSHORT:
				return TIFF_SETGET_SINT16;
			case TIFF_SLONG:
				return TIFF_SETGET_SINT32;
			case TIFF_DOUBLE:
				return TIFF_SETGET_DOUBLE;
			case TIFF_IFD:
			case TIFF_IFD8:
				return TIFF_SETGET_IFD8;
			case TIFF_LONG8:
				return TIFF_SETGET_UINT64;
			case TIFF_SLONG8:
				return TIFF_SETGET_SINT64;
			default:
				return TIFF_SETGET_UNDEFINED;
		}
	}

	else if (count >= 1 && passcount == 0) {
		switch (type)
		{
			case TIFF_BYTE:
			case TIFF_UNDEFINED:
				return TIFF_SETGET_C0_UINT8;
			case TIFF_ASCII:
				return TIFF_SETGET_C0_ASCII;
			case TIFF_SHORT:
				return TIFF_SETGET_C0_UINT16;
			case TIFF_LONG:
				return TIFF_SETGET_C0_UINT32;
			case TIFF_RATIONAL:
			case TIFF_SRATIONAL:
			case TIFF_FLOAT:
				return TIFF_SETGET_C0_FLOAT;
			case TIFF_SBYTE:
				return TIFF_SETGET_C0_SINT8;
			case TIFF_SSHORT:
				return TIFF_SETGET_C0_SINT16;
			case TIFF_SLONG:
				return TIFF_SETGET_C0_SINT32;
			case TIFF_DOUBLE:
				return TIFF_SETGET_C0_DOUBLE;
			case TIFF_IFD:
			case TIFF_IFD8:
				return TIFF_SETGET_C0_IFD8;
			case TIFF_LONG8:
				return TIFF_SETGET_C0_UINT64;
			case TIFF_SLONG8:
				return TIFF_SETGET_C0_SINT64;
			default:
				return TIFF_SETGET_UNDEFINED;
		}
	}

	else if (count == TIFF_VARIABLE && passcount == 1) {
		switch (type)
		{
			case TIFF_BYTE:
			case TIFF_UNDEFINED:
				return TIFF_SETGET_C16_UINT8;
			case TIFF_ASCII:
				return TIFF_SETGET_C16_ASCII;
			case TIFF_SHORT:
				return TIFF_SETGET_C16_UINT16;
			case TIFF_LONG:
				return TIFF_SETGET_C16_UINT32;
			case TIFF_RATIONAL:
			case TIFF_SRATIONAL:
			case TIFF_FLOAT:
				return TIFF_SETGET_C16_FLOAT;
			case TIFF_SBYTE:
				return TIFF_SETGET_C16_SINT8;
			case TIFF_SSHORT:
				return TIFF_SETGET_C16_SINT16;
			case TIFF_SLONG:
				return TIFF_SETGET_C16_SINT32;
			case TIFF_DOUBLE:
				return TIFF_SETGET_C16_DOUBLE;
			case TIFF_IFD:
			case TIFF_IFD8:
				return TIFF_SETGET_C16_IFD8;
			case TIFF_LONG8:
				return TIFF_SETGET_C16_UINT64;
			case TIFF_SLONG8:
				return TIFF_SETGET_C16_SINT64;
			default:
				return TIFF_SETGET_UNDEFINED;
		}
	}

	else if (count == TIFF_VARIABLE2 && passcount == 1) {
		switch (type)
		{
			case TIFF_BYTE:
			case TIFF_UNDEFINED:
				return TIFF_SETGET_C32_UINT8;
			case TIFF_ASCII:
				return TIFF_SETGET_C32_ASCII;
			case TIFF_SHORT:
				return TIFF_SETGET_C32_UINT16;
			case TIFF_LONG:
				return TIFF_SETGET_C32_UINT32;
			case TIFF_RATIONAL:
			case TIFF_SRATIONAL:
			case TIFF_FLOAT:
				return TIFF_SETGET_C32_FLOAT;
			case TIFF_SBYTE:
				return TIFF_SETGET_C32_SINT8;
			case TIFF_SSHORT:
				return TIFF_SETGET_C32_SINT16;
			case TIFF_SLONG:
				return TIFF_SETGET_C32_SINT32;
			case TIFF_DOUBLE:
				return TIFF_SETGET_C32_DOUBLE;
			case TIFF_IFD:
			case TIFF_IFD8:
				return TIFF_SETGET_C32_IFD8;
			case TIFF_LONG8:
				return TIFF_SETGET_C32_UINT64;
			case TIFF_SLONG8:
				return TIFF_SETGET_C32_SINT64;
			default:
				return TIFF_SETGET_UNDEFINED;
		}
	}

	return TIFF_SETGET_UNDEFINED;
}

int
TIFFMergeFieldInfo(TIFF* tif, const TIFFFieldInfo info[], uint32_t n)
{
	static const char module[] = "TIFFMergeFieldInfo";
	static const char reason[] = "for fields array";
	TIFFField *tp;
	size_t nfields;
	uint32_t i;

	if (tif->tif_nfieldscompat > 0) {
		tif->tif_fieldscompat = (TIFFFieldArray *)
			_TIFFCheckRealloc(tif, tif->tif_fieldscompat,
					  tif->tif_nfieldscompat + 1,
					  sizeof(TIFFFieldArray), reason);
	} else {
		tif->tif_fieldscompat = (TIFFFieldArray *)
			_TIFFCheckMalloc(tif, 1, sizeof(TIFFFieldArray),
					 reason);
	}
	if (!tif->tif_fieldscompat) {
		TIFFErrorExt(tif->tif_clientdata, module,
			     "Failed to allocate fields array");
		return -1;
	}
	nfields = tif->tif_nfieldscompat++;

	tif->tif_fieldscompat[nfields].type = tfiatOther;
	tif->tif_fieldscompat[nfields].allocated_size = n;
	tif->tif_fieldscompat[nfields].count = n;
	tif->tif_fieldscompat[nfields].fields =
		(TIFFField *)_TIFFCheckMalloc(tif, n, sizeof(TIFFField),
					      reason);
	if (!tif->tif_fieldscompat[nfields].fields) {
		TIFFErrorExt(tif->tif_clientdata, module,
			     "Failed to allocate fields array");
		return -1;
	}

	tp = tif->tif_fieldscompat[nfields].fields;
	for (i = 0; i < n; i++) {
		tp->field_tag = info[i].field_tag;
		tp->field_readcount = info[i].field_readcount;
		tp->field_writecount = info[i].field_writecount;
		tp->field_type = info[i].field_type;
		tp->field_anonymous = 0;
		tp->set_field_type =
		     _TIFFSetGetType(info[i].field_type,
				info[i].field_readcount,
				info[i].field_passcount);
		tp->get_field_type =
		     _TIFFSetGetType(info[i].field_type,
				info[i].field_readcount,
				info[i].field_passcount);
		tp->field_bit = info[i].field_bit;
		tp->field_oktochange = info[i].field_oktochange;
		tp->field_passcount = info[i].field_passcount;
		if (info[i].field_name == NULL) {
			TIFFErrorExt(tif->tif_clientdata, module,
				"Field_name of %d.th allocation tag %d is NULL", i, info[i].field_tag);
			return -1;
		}
		tp->field_name = info[i].field_name;
		tp->field_subfields = NULL;
		tp++;
	}

	if (!_TIFFMergeFields(tif, tif->tif_fieldscompat[nfields].fields, n)) {
		TIFFErrorExt(tif->tif_clientdata, module,
			     "Setting up field info failed");
		return -1;
	}

	return 0;
}

int
_TIFFCheckFieldIsValidForCodec(TIFF *tif, ttag_t tag)
{
	/* Filter out non-codec specific tags */
	switch (tag) {
	    /* Shared tags */
	    case TIFFTAG_PREDICTOR:
	    /* JPEG tags */
	    case TIFFTAG_JPEGTABLES:
	    /* OJPEG tags */
	    case TIFFTAG_JPEGIFOFFSET:
	    case TIFFTAG_JPEGIFBYTECOUNT:
	    case TIFFTAG_JPEGQTABLES:
	    case TIFFTAG_JPEGDCTABLES:
	    case TIFFTAG_JPEGACTABLES:
	    case TIFFTAG_JPEGPROC:
	    case TIFFTAG_JPEGRESTARTINTERVAL:
	    /* CCITT* */
	    case TIFFTAG_BADFAXLINES:
	    case TIFFTAG_CLEANFAXDATA:
	    case TIFFTAG_CONSECUTIVEBADFAXLINES:
	    case TIFFTAG_GROUP3OPTIONS:
	    case TIFFTAG_GROUP4OPTIONS:
	    /* LERC */
	    case TIFFTAG_LERC_PARAMETERS:
		break;
	    default:
		return 1;
	}
	/* Check if codec specific tags are allowed for the current
	 * compression scheme (codec) */
	switch (tif->tif_dir.td_compression) {
	    case COMPRESSION_LZW:
		if (tag == TIFFTAG_PREDICTOR)
		    return 1;
		break;
	    case COMPRESSION_PACKBITS:
		/* No codec-specific tags */
		break;
	    case COMPRESSION_THUNDERSCAN:
		/* No codec-specific tags */
		break;
	    case COMPRESSION_NEXT:
		/* No codec-specific tags */
		break;
	    case COMPRESSION_JPEG:
		if (tag == TIFFTAG_JPEGTABLES)
		    return 1;
		break;
	    case COMPRESSION_OJPEG:
		switch (tag) {
		    case TIFFTAG_JPEGIFOFFSET:
		    case TIFFTAG_JPEGIFBYTECOUNT:
		    case TIFFTAG_JPEGQTABLES:
		    case TIFFTAG_JPEGDCTABLES:
		    case TIFFTAG_JPEGACTABLES:
		    case TIFFTAG_JPEGPROC:
		    case TIFFTAG_JPEGRESTARTINTERVAL:
			return 1;
		}
		break;
	    case COMPRESSION_CCITTRLE:
	    case COMPRESSION_CCITTRLEW:
	    case COMPRESSION_CCITTFAX3:
	    case COMPRESSION_CCITTFAX4:
		switch (tag) {
		    case TIFFTAG_BADFAXLINES:
		    case TIFFTAG_CLEANFAXDATA:
		    case TIFFTAG_CONSECUTIVEBADFAXLINES:
			return 1;
		    case TIFFTAG_GROUP3OPTIONS:
			if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX3)
			    return 1;
			break;
		    case TIFFTAG_GROUP4OPTIONS:
			if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4)
			    return 1;
			break;
		}
		break;
	    case COMPRESSION_JBIG:
		/* No codec-specific tags */
		break;
	    case COMPRESSION_DEFLATE:
	    case COMPRESSION_ADOBE_DEFLATE:
		if (tag == TIFFTAG_PREDICTOR)
		    return 1;
		break;
	   case COMPRESSION_PIXARLOG:
		if (tag == TIFFTAG_PREDICTOR)
		    return 1;
		break;
	    case COMPRESSION_SGILOG:
	    case COMPRESSION_SGILOG24:
		/* No codec-specific tags */
		break;
	    case COMPRESSION_LZMA:
		if (tag == TIFFTAG_PREDICTOR)
		    return 1;
		break;
	    case COMPRESSION_ZSTD:
		if (tag == TIFFTAG_PREDICTOR)
		    return 1;
		break;
	    case COMPRESSION_LERC:
		if (tag == TIFFTAG_LERC_PARAMETERS)
		    return 1;
		break;
	}
	return 0;
}

/* vim: set ts=8 sts=8 sw=8 noet: */

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 8
 * fill-column: 78
 * End:
 */
