src/tiff/tiffiop.h

/* $Header$ */

/*
 * 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.
 */

#ifndef _TIFFIOP_
#define	_TIFFIOP_
/*
 * ``Library-private'' definitions.
 */
/*
 * UNIX systems should run the configure script to generate
 * a port.h file that reflects the system capabilities.
 * Doing this obviates all the dreck done in tiffcomp.h.
 */
#if (defined(unix) || defined(__unix)) && !defined(__DJGPP__)
#include "port.h"
#include "tiffconf.h"
#else
#include "tiffconf.h"
#include "tiffcomp.h"
#endif
#include "tiffio.h"
#include "tif_dir.h"

#ifndef TRUE
#define	TRUE	1
#define	FALSE	0
#endif

typedef struct client_info {
    struct client_info *next;
    void      *data;
    char      *name;
} TIFFClientInfoLink;

/*
 * Typedefs for ``method pointers'' used internally.
 */
typedef	unsigned char tidataval_t;	/* internal image data value type */
typedef	tidataval_t* tidata_t;		/* reference to internal image data */

typedef	void (*TIFFVoidMethod)(TIFF*);
typedef	int (*TIFFBoolMethod)(TIFF*);
typedef	int (*TIFFPreMethod)(TIFF*, tsample_t);
typedef	int (*TIFFCodeMethod)(TIFF*, tidata_t, tsize_t, tsample_t);
typedef	int (*TIFFSeekMethod)(TIFF*, uint32);
typedef	void (*TIFFPostMethod)(TIFF*, tidata_t, tsize_t);
typedef	uint32 (*TIFFStripMethod)(TIFF*, uint32);
typedef	void (*TIFFTileMethod)(TIFF*, uint32*, uint32*);

struct tiff {
	char*		tif_name;	/* name of open file */
	int		tif_fd;		/* open file descriptor */
	int		tif_mode;	/* open mode (O_*) */
	uint32		tif_flags;
#define	TIFF_FILLORDER		0x0003	/* natural bit fill order for machine */
#define	TIFF_DIRTYHEADER	0x0004	/* header must be written on close */
#define	TIFF_DIRTYDIRECT	0x0008	/* current directory must be written */
#define	TIFF_BUFFERSETUP	0x0010	/* data buffers setup */
#define	TIFF_CODERSETUP		0x0020	/* encoder/decoder setup done */
#define	TIFF_BEENWRITING	0x0040	/* written 1+ scanlines to file */
#define	TIFF_SWAB		0x0080	/* byte swap file information */
#define	TIFF_NOBITREV		0x0100	/* inhibit bit reversal logic */
#define	TIFF_MYBUFFER		0x0200	/* my raw data buffer; free on close */
#define	TIFF_ISTILED		0x0400	/* file is tile, not strip- based */
#define	TIFF_MAPPED		0x0800	/* file is mapped into memory */
#define	TIFF_POSTENCODE		0x1000	/* need call to postencode routine */
#define	TIFF_INSUBIFD		0x2000	/* currently writing a subifd */
#define	TIFF_UPSAMPLED		0x4000	/* library is doing data up-sampling */
#define	TIFF_STRIPCHOP		0x8000	/* enable strip chopping support */
	toff_t		tif_diroff;	/* file offset of current directory */
	toff_t		tif_nextdiroff;	/* file offset of following directory */
	toff_t*		tif_dirlist;	/* list of offsets to already seen */
					/* directories to prevent IFD looping */
	uint16		tif_dirnumber;  /* number of already seen directories */
	TIFFDirectory	tif_dir;	/* internal rep of current directory */
	TIFFHeader	tif_header;	/* file's header block */
	const int*	tif_typeshift;	/* data type shift counts */
	const long*	tif_typemask;	/* data type masks */
	uint32		tif_row;	/* current scanline */
	tdir_t		tif_curdir;	/* current directory (index) */
	tstrip_t	tif_curstrip;	/* current strip for read/write */
	toff_t		tif_curoff;	/* current offset for read/write */
	toff_t		tif_dataoff;	/* current offset for writing dir */
#if SUBIFD_SUPPORT
	uint16		tif_nsubifd;	/* remaining subifds to write */
	toff_t		tif_subifdoff;	/* offset for patching SubIFD link */
#endif
/* tiling support */
	uint32 		tif_col;	/* current column (offset by row too) */
	ttile_t		tif_curtile;	/* current tile for read/write */
	tsize_t		tif_tilesize;	/* # of bytes in a tile */
/* compression scheme hooks */
	int		tif_decodestatus;
	TIFFBoolMethod	tif_setupdecode;/* called once before predecode */
	TIFFPreMethod	tif_predecode;	/* pre- row/strip/tile decoding */
	TIFFBoolMethod	tif_setupencode;/* called once before preencode */
	int		tif_encodestatus;
	TIFFPreMethod	tif_preencode;	/* pre- row/strip/tile encoding */
	TIFFBoolMethod	tif_postencode;	/* post- row/strip/tile encoding */
	TIFFCodeMethod	tif_decoderow;	/* scanline decoding routine */
	TIFFCodeMethod	tif_encoderow;	/* scanline encoding routine */
	TIFFCodeMethod	tif_decodestrip;/* strip decoding routine */
	TIFFCodeMethod	tif_encodestrip;/* strip encoding routine */
	TIFFCodeMethod	tif_decodetile;	/* tile decoding routine */
	TIFFCodeMethod	tif_encodetile;	/* tile encoding routine */
	TIFFVoidMethod	tif_close;	/* cleanup-on-close routine */
	TIFFSeekMethod	tif_seek;	/* position within a strip routine */
	TIFFVoidMethod	tif_cleanup;	/* cleanup state routine */
	TIFFStripMethod	tif_defstripsize;/* calculate/constrain strip size */
	TIFFTileMethod	tif_deftilesize;/* calculate/constrain tile size */
	tidata_t	tif_data;	/* compression scheme private data */
/* input/output buffering */
	tsize_t		tif_scanlinesize;/* # of bytes in a scanline */
	tsize_t		tif_scanlineskew;/* scanline skew for reading strips */
	tidata_t	tif_rawdata;	/* raw data buffer */
	tsize_t		tif_rawdatasize;/* # of bytes in raw data buffer */
	tidata_t	tif_rawcp;	/* current spot in raw buffer */
	tsize_t		tif_rawcc;	/* bytes unread from raw buffer */
/* memory-mapped file support */
	tidata_t	tif_base;	/* base of mapped file */
	toff_t		tif_size;	/* size of mapped file region (bytes) */
	TIFFMapFileProc	tif_mapproc;	/* map file method */
	TIFFUnmapFileProc tif_unmapproc;/* unmap file method */
/* input/output callback methods */
	thandle_t	tif_clientdata;	/* callback parameter */
	TIFFReadWriteProc tif_readproc;	/* read method */
	TIFFReadWriteProc tif_writeproc;/* write method */
	TIFFSeekProc	tif_seekproc;	/* lseek method */
	TIFFCloseProc	tif_closeproc;	/* close method */
	TIFFSizeProc	tif_sizeproc;	/* filesize method */
/* post-decoding support */
	TIFFPostMethod	tif_postdecode;	/* post decoding routine */
/* tag support */
	TIFFFieldInfo**	tif_fieldinfo;	/* sorted table of registered tags */
	int		tif_nfields;	/* # entries in registered tag table */
        TIFFTagMethods  tif_tagmethods; /* tag get/set/print routines */
        TIFFClientInfoLink *tif_clientinfo; /* extra client information. */
};

#define	isPseudoTag(t)	(t > 0xffff)	/* is tag value normal or pseudo */

#define	isTiled(tif)	(((tif)->tif_flags & TIFF_ISTILED) != 0)
#define	isMapped(tif)	(((tif)->tif_flags & TIFF_MAPPED) != 0)
#define	isFillOrder(tif, o)	(((tif)->tif_flags & (o)) != 0)
#define	isUpSampled(tif)	(((tif)->tif_flags & TIFF_UPSAMPLED) != 0)
#define	TIFFReadFile(tif, buf, size) \
	((*(tif)->tif_readproc)((tif)->tif_clientdata,buf,size))
#define	TIFFWriteFile(tif, buf, size) \
	((*(tif)->tif_writeproc)((tif)->tif_clientdata,buf,size))
#define	TIFFSeekFile(tif, off, whence) \
	((*(tif)->tif_seekproc)((tif)->tif_clientdata,(toff_t)(off),whence))
#define	TIFFCloseFile(tif) \
	((*(tif)->tif_closeproc)((tif)->tif_clientdata))
#define	TIFFGetFileSize(tif) \
	((*(tif)->tif_sizeproc)((tif)->tif_clientdata))
#define	TIFFMapFileContents(tif, paddr, psize) \
	((*(tif)->tif_mapproc)((tif)->tif_clientdata,paddr,psize))
#define	TIFFUnmapFileContents(tif, addr, size) \
	((*(tif)->tif_unmapproc)((tif)->tif_clientdata,addr,size))

/*
 * Default Read/Seek/Write definitions.
 */
#ifndef ReadOK
#define	ReadOK(tif, buf, size) \
	(TIFFReadFile(tif, (tdata_t) buf, (tsize_t)(size)) == (tsize_t)(size))
#endif
#ifndef SeekOK
#define	SeekOK(tif, off) \
	(TIFFSeekFile(tif, (toff_t) off, SEEK_SET) == (toff_t) off)
#endif
#ifndef WriteOK
#define	WriteOK(tif, buf, size) \
	(TIFFWriteFile(tif, (tdata_t) buf, (tsize_t) size) == (tsize_t) size)
#endif

/* NB: the uint32 casts are to silence certain ANSI-C compilers */
#define TIFFhowmany(x, y) ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y)))
#define TIFFhowmany8(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3)
#define	TIFFroundup(x, y) (TIFFhowmany(x,y)*(y))

#define TIFFmax(A,B) ((A)>(B)?(A):(B))
#define TIFFmin(A,B) ((A)<(B)?(A):(B))

#if defined(__cplusplus)
extern "C" {
#endif
extern	int _TIFFgetMode(const char*, const char*);
extern	int _TIFFNoRowEncode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoStripEncode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoTileEncode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoRowDecode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoStripDecode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	int _TIFFNoTileDecode(TIFF*, tidata_t, tsize_t, tsample_t);
extern	void _TIFFNoPostDecode(TIFF*, tidata_t, tsize_t);
extern  int  _TIFFNoPreCode (TIFF*, tsample_t);
extern	int _TIFFNoSeek(TIFF*, uint32);
extern	void _TIFFSwab16BitData(TIFF*, tidata_t, tsize_t);
extern	void _TIFFSwab32BitData(TIFF*, tidata_t, tsize_t);
extern	void _TIFFSwab64BitData(TIFF*, tidata_t, tsize_t);
extern	int TIFFFlushData1(TIFF*);
extern	void TIFFFreeDirectory(TIFF*);
extern	int TIFFDefaultDirectory(TIFF*);
extern	int TIFFSetCompressionScheme(TIFF*, int);
extern	int TIFFSetDefaultCompressionState(TIFF*);
extern	uint32 _TIFFDefaultStripSize(TIFF*, uint32);
extern	void _TIFFDefaultTileSize(TIFF*, uint32*, uint32*);

extern	void _TIFFsetByteArray(void**, void*, long);
extern	void _TIFFsetString(char**, char*);
extern	void _TIFFsetShortArray(uint16**, uint16*, long);
extern	void _TIFFsetLongArray(uint32**, uint32*, long);
extern	void _TIFFsetFloatArray(float**, float*, long);
extern	void _TIFFsetDoubleArray(double**, double*, long);

extern	void _TIFFprintAscii(FILE*, const char*);
extern	void _TIFFprintAsciiTag(FILE*, const char*, const char*);

GLOBALDATA(TIFFErrorHandler,_TIFFwarningHandler);
GLOBALDATA(TIFFErrorHandler,_TIFFerrorHandler);

extern	int TIFFInitDumpMode(TIFF*, int);
#ifdef PACKBITS_SUPPORT
extern	int TIFFInitPackBits(TIFF*, int);
#endif
#ifdef CCITT_SUPPORT
extern	int TIFFInitCCITTRLE(TIFF*, int), TIFFInitCCITTRLEW(TIFF*, int);
extern	int TIFFInitCCITTFax3(TIFF*, int), TIFFInitCCITTFax4(TIFF*, int);
#endif
#ifdef THUNDER_SUPPORT
extern	int TIFFInitThunderScan(TIFF*, int);
#endif
#ifdef NEXT_SUPPORT
extern	int TIFFInitNeXT(TIFF*, int);
#endif
#ifdef LZW_SUPPORT
extern	int TIFFInitLZW(TIFF*, int);
#endif
#ifdef OJPEG_SUPPORT
extern	int TIFFInitOJPEG(TIFF*, int);
#endif
#ifdef JPEG_SUPPORT
extern	int TIFFInitJPEG(TIFF*, int);
#endif
#ifdef JBIG_SUPPORT
extern	int TIFFInitJBIG(TIFF*, int);
#endif
#ifdef ZIP_SUPPORT
extern	int TIFFInitZIP(TIFF*, int);
#endif
#ifdef PIXARLOG_SUPPORT
extern	int TIFFInitPixarLog(TIFF*, int);
#endif
#ifdef LOGLUV_SUPPORT
extern	int TIFFInitSGILog(TIFF*, int);
#endif
#ifdef VMS
extern	const TIFFCodec _TIFFBuiltinCODECS[];
#else
extern	TIFFCodec _TIFFBuiltinCODECS[];
#endif

#if defined(__cplusplus)
}
#endif
#endif /* _TIFFIOP_ */
Commit	Line	Data
	1	/* $Header$ */
	2
	3	/*
	4	* Copyright (c) 1988-1997 Sam Leffler
	5	* Copyright (c) 1991-1997 Silicon Graphics, Inc.
	6	*
	7	* Permission to use, copy, modify, distribute, and sell this software and
	8	* its documentation for any purpose is hereby granted without fee, provided
	9	* that (i) the above copyright notices and this permission notice appear in
	10	* all copies of the software and related documentation, and (ii) the names of
	11	* Sam Leffler and Silicon Graphics may not be used in any advertising or
	12	* publicity relating to the software without the specific, prior written
	13	* permission of Sam Leffler and Silicon Graphics.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	16	* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	17	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	18	*
	19	* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	20	* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	21	* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	22	* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	23	* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	24	* OF THIS SOFTWARE.
	25	*/
	26
	27	#ifndef _TIFFIOP_
	28	#define _TIFFIOP_
	29	/*
	30	* ``Library-private'' definitions.
	31	*/
	32	/*
	33	* UNIX systems should run the configure script to generate
	34	* a port.h file that reflects the system capabilities.
	35	* Doing this obviates all the dreck done in tiffcomp.h.
	36	*/
	37	#if (defined(unix) \|\| defined(__unix)) && !defined(__DJGPP__)
	38	#include "port.h"
	39	#include "tiffconf.h"
	40	#else
	41	#include "tiffconf.h"
	42	#include "tiffcomp.h"
	43	#endif
	44	#include "tiffio.h"
	45	#include "tif_dir.h"
	46
	47	#ifndef TRUE
	48	#define TRUE 1
	49	#define FALSE 0
	50	#endif
	51
	52	typedef struct client_info {
	53	struct client_info *next;
	54	void *data;
	55	char *name;
	56	} TIFFClientInfoLink;
	57
	58	/*
	59	* Typedefs for ``method pointers'' used internally.
	60	*/
	61	typedef unsigned char tidataval_t; /* internal image data value type */
	62	typedef tidataval_t* tidata_t; /* reference to internal image data */
	63
	64	typedef void (TIFFVoidMethod)(TIFF);
	65	typedef int (TIFFBoolMethod)(TIFF);
	66	typedef int (TIFFPreMethod)(TIFF, tsample_t);
	67	typedef int (TIFFCodeMethod)(TIFF, tidata_t, tsize_t, tsample_t);
	68	typedef int (TIFFSeekMethod)(TIFF, uint32);
	69	typedef void (TIFFPostMethod)(TIFF, tidata_t, tsize_t);
	70	typedef uint32 (TIFFStripMethod)(TIFF, uint32);
	71	typedef void (TIFFTileMethod)(TIFF, uint32, uint32);
	72
	73	struct tiff {
	74	char* tif_name; /* name of open file */
	75	int tif_fd; /* open file descriptor */
	76	int tif_mode; /* open mode (O_) /
	77	uint32 tif_flags;
	78	#define TIFF_FILLORDER 0x0003 /* natural bit fill order for machine */
	79	#define TIFF_DIRTYHEADER 0x0004 /* header must be written on close */
	80	#define TIFF_DIRTYDIRECT 0x0008 /* current directory must be written */
	81	#define TIFF_BUFFERSETUP 0x0010 /* data buffers setup */
	82	#define TIFF_CODERSETUP 0x0020 /* encoder/decoder setup done */
	83	#define TIFF_BEENWRITING 0x0040 /* written 1+ scanlines to file */
	84	#define TIFF_SWAB 0x0080 /* byte swap file information */
	85	#define TIFF_NOBITREV 0x0100 /* inhibit bit reversal logic */
	86	#define TIFF_MYBUFFER 0x0200 /* my raw data buffer; free on close */
	87	#define TIFF_ISTILED 0x0400 /* file is tile, not strip- based */
	88	#define TIFF_MAPPED 0x0800 /* file is mapped into memory */
	89	#define TIFF_POSTENCODE 0x1000 /* need call to postencode routine */
	90	#define TIFF_INSUBIFD 0x2000 /* currently writing a subifd */
	91	#define TIFF_UPSAMPLED 0x4000 /* library is doing data up-sampling */
	92	#define TIFF_STRIPCHOP 0x8000 /* enable strip chopping support */
	93	toff_t tif_diroff; /* file offset of current directory */
	94	toff_t tif_nextdiroff; /* file offset of following directory */
	95	toff_t* tif_dirlist; /* list of offsets to already seen */
	96	/* directories to prevent IFD looping */
	97	uint16 tif_dirnumber; /* number of already seen directories */
	98	TIFFDirectory tif_dir; /* internal rep of current directory */
	99	TIFFHeader tif_header; /* file's header block */
	100	const int* tif_typeshift; /* data type shift counts */
	101	const long* tif_typemask; /* data type masks */
	102	uint32 tif_row; /* current scanline */
	103	tdir_t tif_curdir; /* current directory (index) */
	104	tstrip_t tif_curstrip; /* current strip for read/write */
	105	toff_t tif_curoff; /* current offset for read/write */
	106	toff_t tif_dataoff; /* current offset for writing dir */
	107	#if SUBIFD_SUPPORT
	108	uint16 tif_nsubifd; /* remaining subifds to write */
	109	toff_t tif_subifdoff; /* offset for patching SubIFD link */
	110	#endif
	111	/* tiling support */
	112	uint32 tif_col; /* current column (offset by row too) */
	113	ttile_t tif_curtile; /* current tile for read/write */
	114	tsize_t tif_tilesize; /* # of bytes in a tile */
	115	/* compression scheme hooks */
	116	int tif_decodestatus;
	117	TIFFBoolMethod tif_setupdecode;/* called once before predecode */
	118	TIFFPreMethod tif_predecode; /* pre- row/strip/tile decoding */
	119	TIFFBoolMethod tif_setupencode;/* called once before preencode */
	120	int tif_encodestatus;
	121	TIFFPreMethod tif_preencode; /* pre- row/strip/tile encoding */
	122	TIFFBoolMethod tif_postencode; /* post- row/strip/tile encoding */
	123	TIFFCodeMethod tif_decoderow; /* scanline decoding routine */
	124	TIFFCodeMethod tif_encoderow; /* scanline encoding routine */
	125	TIFFCodeMethod tif_decodestrip;/* strip decoding routine */
	126	TIFFCodeMethod tif_encodestrip;/* strip encoding routine */
	127	TIFFCodeMethod tif_decodetile; /* tile decoding routine */
	128	TIFFCodeMethod tif_encodetile; /* tile encoding routine */
	129	TIFFVoidMethod tif_close; /* cleanup-on-close routine */
	130	TIFFSeekMethod tif_seek; /* position within a strip routine */
	131	TIFFVoidMethod tif_cleanup; /* cleanup state routine */
	132	TIFFStripMethod tif_defstripsize;/* calculate/constrain strip size */
	133	TIFFTileMethod tif_deftilesize;/* calculate/constrain tile size */
	134	tidata_t tif_data; /* compression scheme private data */
	135	/* input/output buffering */
	136	tsize_t tif_scanlinesize;/* # of bytes in a scanline */
	137	tsize_t tif_scanlineskew;/* scanline skew for reading strips */
	138	tidata_t tif_rawdata; /* raw data buffer */
	139	tsize_t tif_rawdatasize;/* # of bytes in raw data buffer */
	140	tidata_t tif_rawcp; /* current spot in raw buffer */
	141	tsize_t tif_rawcc; /* bytes unread from raw buffer */
	142	/* memory-mapped file support */
	143	tidata_t tif_base; /* base of mapped file */
	144	toff_t tif_size; /* size of mapped file region (bytes) */
	145	TIFFMapFileProc tif_mapproc; /* map file method */
	146	TIFFUnmapFileProc tif_unmapproc;/* unmap file method */
	147	/* input/output callback methods */
	148	thandle_t tif_clientdata; /* callback parameter */
	149	TIFFReadWriteProc tif_readproc; /* read method */
	150	TIFFReadWriteProc tif_writeproc;/* write method */
	151	TIFFSeekProc tif_seekproc; /* lseek method */
	152	TIFFCloseProc tif_closeproc; /* close method */
	153	TIFFSizeProc tif_sizeproc; /* filesize method */
	154	/* post-decoding support */
	155	TIFFPostMethod tif_postdecode; /* post decoding routine */
	156	/* tag support */
	157	TIFFFieldInfo** tif_fieldinfo; /* sorted table of registered tags */
	158	int tif_nfields; /* # entries in registered tag table */
	159	TIFFTagMethods tif_tagmethods; /* tag get/set/print routines */
	160	TIFFClientInfoLink tif_clientinfo; / extra client information. */
	161	};
	162
	163	#define isPseudoTag(t) (t > 0xffff) /* is tag value normal or pseudo */
	164
	165	#define isTiled(tif) (((tif)->tif_flags & TIFF_ISTILED) != 0)
	166	#define isMapped(tif) (((tif)->tif_flags & TIFF_MAPPED) != 0)
	167	#define isFillOrder(tif, o) (((tif)->tif_flags & (o)) != 0)
	168	#define isUpSampled(tif) (((tif)->tif_flags & TIFF_UPSAMPLED) != 0)
	169	#define TIFFReadFile(tif, buf, size) \
	170	((*(tif)->tif_readproc)((tif)->tif_clientdata,buf,size))
	171	#define TIFFWriteFile(tif, buf, size) \
	172	((*(tif)->tif_writeproc)((tif)->tif_clientdata,buf,size))
	173	#define TIFFSeekFile(tif, off, whence) \
	174	((*(tif)->tif_seekproc)((tif)->tif_clientdata,(toff_t)(off),whence))
	175	#define TIFFCloseFile(tif) \
	176	((*(tif)->tif_closeproc)((tif)->tif_clientdata))
	177	#define TIFFGetFileSize(tif) \
	178	((*(tif)->tif_sizeproc)((tif)->tif_clientdata))
	179	#define TIFFMapFileContents(tif, paddr, psize) \
	180	((*(tif)->tif_mapproc)((tif)->tif_clientdata,paddr,psize))
	181	#define TIFFUnmapFileContents(tif, addr, size) \
	182	((*(tif)->tif_unmapproc)((tif)->tif_clientdata,addr,size))
	183
	184	/*
	185	* Default Read/Seek/Write definitions.
	186	*/
	187	#ifndef ReadOK
	188	#define ReadOK(tif, buf, size) \
	189	(TIFFReadFile(tif, (tdata_t) buf, (tsize_t)(size)) == (tsize_t)(size))
	190	#endif
	191	#ifndef SeekOK
	192	#define SeekOK(tif, off) \
	193	(TIFFSeekFile(tif, (toff_t) off, SEEK_SET) == (toff_t) off)
	194	#endif
	195	#ifndef WriteOK
	196	#define WriteOK(tif, buf, size) \
	197	(TIFFWriteFile(tif, (tdata_t) buf, (tsize_t) size) == (tsize_t) size)
	198	#endif
	199
	200	/* NB: the uint32 casts are to silence certain ANSI-C compilers */
	201	#define TIFFhowmany(x, y) ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y)))
	202	#define TIFFhowmany8(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3)
	203	#define TIFFroundup(x, y) (TIFFhowmany(x,y)*(y))
	204
	205	#define TIFFmax(A,B) ((A)>(B)?(A):(B))
	206	#define TIFFmin(A,B) ((A)<(B)?(A):(B))
	207
	208	#if defined(__cplusplus)
	209	extern "C" {
	210	#endif
	211	extern int _TIFFgetMode(const char, const char);
	212	extern int _TIFFNoRowEncode(TIFF*, tidata_t, tsize_t, tsample_t);
	213	extern int _TIFFNoStripEncode(TIFF*, tidata_t, tsize_t, tsample_t);
	214	extern int _TIFFNoTileEncode(TIFF*, tidata_t, tsize_t, tsample_t);
	215	extern int _TIFFNoRowDecode(TIFF*, tidata_t, tsize_t, tsample_t);
	216	extern int _TIFFNoStripDecode(TIFF*, tidata_t, tsize_t, tsample_t);
	217	extern int _TIFFNoTileDecode(TIFF*, tidata_t, tsize_t, tsample_t);
	218	extern void _TIFFNoPostDecode(TIFF*, tidata_t, tsize_t);
	219	extern int _TIFFNoPreCode (TIFF*, tsample_t);
	220	extern int _TIFFNoSeek(TIFF*, uint32);
	221	extern void _TIFFSwab16BitData(TIFF*, tidata_t, tsize_t);
	222	extern void _TIFFSwab32BitData(TIFF*, tidata_t, tsize_t);
	223	extern void _TIFFSwab64BitData(TIFF*, tidata_t, tsize_t);
	224	extern int TIFFFlushData1(TIFF*);
	225	extern void TIFFFreeDirectory(TIFF*);
	226	extern int TIFFDefaultDirectory(TIFF*);
	227	extern int TIFFSetCompressionScheme(TIFF*, int);
	228	extern int TIFFSetDefaultCompressionState(TIFF*);
	229	extern uint32 _TIFFDefaultStripSize(TIFF*, uint32);
	230	extern void _TIFFDefaultTileSize(TIFF, uint32, uint32*);
	231
	232	extern void _TIFFsetByteArray(void*, void, long);
	233	extern void _TIFFsetString(char*, char);
	234	extern void _TIFFsetShortArray(uint16*, uint16, long);
	235	extern void _TIFFsetLongArray(uint32*, uint32, long);
	236	extern void _TIFFsetFloatArray(float*, float, long);
	237	extern void _TIFFsetDoubleArray(double*, double, long);
	238
	239	extern void _TIFFprintAscii(FILE, const char);
	240	extern void _TIFFprintAsciiTag(FILE, const char, const char*);
	241
	242	GLOBALDATA(TIFFErrorHandler,_TIFFwarningHandler);
	243	GLOBALDATA(TIFFErrorHandler,_TIFFerrorHandler);
	244
	245	extern int TIFFInitDumpMode(TIFF*, int);
	246	#ifdef PACKBITS_SUPPORT
	247	extern int TIFFInitPackBits(TIFF*, int);
	248	#endif
	249	#ifdef CCITT_SUPPORT
	250	extern int TIFFInitCCITTRLE(TIFF, int), TIFFInitCCITTRLEW(TIFF, int);
	251	extern int TIFFInitCCITTFax3(TIFF, int), TIFFInitCCITTFax4(TIFF, int);
	252	#endif
	253	#ifdef THUNDER_SUPPORT
	254	extern int TIFFInitThunderScan(TIFF*, int);
	255	#endif
	256	#ifdef NEXT_SUPPORT
	257	extern int TIFFInitNeXT(TIFF*, int);
	258	#endif
	259	#ifdef LZW_SUPPORT
	260	extern int TIFFInitLZW(TIFF*, int);
	261	#endif
	262	#ifdef OJPEG_SUPPORT
	263	extern int TIFFInitOJPEG(TIFF*, int);
	264	#endif
	265	#ifdef JPEG_SUPPORT
	266	extern int TIFFInitJPEG(TIFF*, int);
	267	#endif
	268	#ifdef JBIG_SUPPORT
	269	extern int TIFFInitJBIG(TIFF*, int);
	270	#endif
	271	#ifdef ZIP_SUPPORT
	272	extern int TIFFInitZIP(TIFF*, int);
	273	#endif
	274	#ifdef PIXARLOG_SUPPORT
	275	extern int TIFFInitPixarLog(TIFF*, int);
	276	#endif
	277	#ifdef LOGLUV_SUPPORT
	278	extern int TIFFInitSGILog(TIFF*, int);
	279	#endif
	280	#ifdef VMS
	281	extern const TIFFCodec _TIFFBuiltinCODECS[];
	282	#else
	283	extern TIFFCodec _TIFFBuiltinCODECS[];
	284	#endif
	285
	286	#if defined(__cplusplus)
	287	}
	288	#endif
	289	#endif /* _TIFFIOP_ */