Imported Upstream version 1.8.0upstream/1.8.0

1 files changed, 0 insertions, 1626 deletions

diff --git a/tiff/libtiff/tif_fax3.c b/tiff/libtiff/tif_fax3.c
deleted file mode 100644
index 9eec4ab..0000000
--- a/tiff/libtiff/tif_fax3.c
+++ /dev/null
@@ -1,1626 +0,0 @@
-/* $Id: tif_fax3.c,v 1.43.2.10 2010-06-09 17:16:58 bfriesen Exp $ */
-
-/*
- * Copyright (c) 1990-1997 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.
- */
-
-#include "tiffiop.h"
-#ifdef CCITT_SUPPORT
-/*
- * TIFF Library.
- *
- * CCITT Group 3 (T.4) and Group 4 (T.6) Compression Support.
- *
- * This file contains support for decoding and encoding TIFF
- * compression algorithms 2, 3, 4, and 32771.
- *
- * Decoder support is derived, with permission, from the code
- * in Frank Cringle's viewfax program;
- *      Copyright (C) 1990, 1995  Frank D. Cringle.
- */
-#include "tif_fax3.h"
-#define	G3CODES
-#include "t4.h"
-#include <stdio.h>
-
-/*
- * Compression+decompression state blocks are
- * derived from this ``base state'' block.
- */
-typedef struct {
-        int     rw_mode;                /* O_RDONLY for decode, else encode */
-	int	mode;			/* operating mode */
-	uint32	rowbytes;		/* bytes in a decoded scanline */
-	uint32	rowpixels;		/* pixels in a scanline */
-
-	uint16	cleanfaxdata;		/* CleanFaxData tag */
-	uint32	badfaxrun;		/* BadFaxRun tag */
-	uint32	badfaxlines;		/* BadFaxLines tag */
-	uint32	groupoptions;		/* Group 3/4 options tag */
-	uint32	recvparams;		/* encoded Class 2 session params */
-	char*	subaddress;		/* subaddress string */
-	uint32	recvtime;		/* time spent receiving (secs) */
-	char*	faxdcs;			/* Table 2/T.30 encoded session params */
-	TIFFVGetMethod vgetparent;	/* super-class method */
-	TIFFVSetMethod vsetparent;	/* super-class method */
-	TIFFPrintMethod printdir;	/* super-class method */
-} Fax3BaseState;
-#define	Fax3State(tif)		((Fax3BaseState*) (tif)->tif_data)
-
-typedef enum { G3_1D, G3_2D } Ttag;
-typedef struct {
-	Fax3BaseState b;
-
-	/* Decoder state info */
-	const unsigned char* bitmap;	/* bit reversal table */
-	uint32	data;			/* current i/o byte/word */
-	int	bit;			/* current i/o bit in byte */
-	int	EOLcnt;			/* count of EOL codes recognized */
-	TIFFFaxFillFunc fill;		/* fill routine */
-	uint32*	runs;			/* b&w runs for current/previous row */
-	uint32*	refruns;		/* runs for reference line */
-	uint32*	curruns;		/* runs for current line */
-
-	/* Encoder state info */
-	Ttag    tag;			/* encoding state */
-	unsigned char*	refline;	/* reference line for 2d decoding */
-	int	k;			/* #rows left that can be 2d encoded */
-	int	maxk;			/* max #rows that can be 2d encoded */
-
-	int line;
-} Fax3CodecState;
-#define	DecoderState(tif)	((Fax3CodecState*) Fax3State(tif))
-#define	EncoderState(tif)	((Fax3CodecState*) Fax3State(tif))
-
-#define	is2DEncoding(sp) \
-	(sp->b.groupoptions & GROUP3OPT_2DENCODING)
-#define	isAligned(p,t)	((((unsigned long)(p)) & (sizeof (t)-1)) == 0)
-
-/*
- * Group 3 and Group 4 Decoding.
- */
-
-/*
- * These macros glue the TIFF library state to
- * the state expected by Frank's decoder.
- */
-#define	DECLARE_STATE(tif, sp, mod)					\
-    static const char module[] = mod;					\
-    Fax3CodecState* sp = DecoderState(tif);				\
-    int a0;				/* reference element */		\
-    int lastx = sp->b.rowpixels;	/* last element in row */	\
-    uint32 BitAcc;			/* bit accumulator */		\
-    int BitsAvail;			/* # valid bits in BitAcc */	\
-    int RunLength;			/* length of current run */	\
-    unsigned char* cp;			/* next byte of input data */	\
-    unsigned char* ep;			/* end of input data */		\
-    uint32* pa;				/* place to stuff next run */	\
-    uint32* thisrun;			/* current row's run array */	\
-    int EOLcnt;				/* # EOL codes recognized */	\
-    const unsigned char* bitmap = sp->bitmap;	/* input data bit reverser */	\
-    const TIFFFaxTabEnt* TabEnt
-#define	DECLARE_STATE_2D(tif, sp, mod)					\
-    DECLARE_STATE(tif, sp, mod);					\
-    int b1;				/* next change on prev line */	\
-    uint32* pb				/* next run in reference line */\
-/*
- * Load any state that may be changed during decoding.
- */
-#define	CACHE_STATE(tif, sp) do {					\
-    BitAcc = sp->data;							\
-    BitsAvail = sp->bit;						\
-    EOLcnt = sp->EOLcnt;						\
-    cp = (unsigned char*) tif->tif_rawcp;				\
-    ep = cp + tif->tif_rawcc;						\
-} while (0)
-/*
- * Save state possibly changed during decoding.
- */
-#define	UNCACHE_STATE(tif, sp) do {					\
-    sp->bit = BitsAvail;						\
-    sp->data = BitAcc;							\
-    sp->EOLcnt = EOLcnt;						\
-    tif->tif_rawcc -= (tidata_t) cp - tif->tif_rawcp;			\
-    tif->tif_rawcp = (tidata_t) cp;					\
-} while (0)
-
-/*
- * Setup state for decoding a strip.
- */
-static int
-Fax3PreDecode(TIFF* tif, tsample_t s)
-{
-	Fax3CodecState* sp = DecoderState(tif);
-
-	(void) s;
-	assert(sp != NULL);
-	sp->bit = 0;			/* force initial read */
-	sp->data = 0;
-	sp->EOLcnt = 0;			/* force initial scan for EOL */
-	/*
-	 * Decoder assumes lsb-to-msb bit order.  Note that we select
-	 * this here rather than in Fax3SetupState so that viewers can
-	 * hold the image open, fiddle with the FillOrder tag value,
-	 * and then re-decode the image.  Otherwise they'd need to close
-	 * and open the image to get the state reset.
-	 */
-	sp->bitmap =
-	    TIFFGetBitRevTable(tif->tif_dir.td_fillorder != FILLORDER_LSB2MSB);
-	if (sp->refruns) {		/* init reference line to white */
-		sp->refruns[0] = (uint32) sp->b.rowpixels;
-		sp->refruns[1] = 0;
-	}
-	sp->line = 0;
-	return (1);
-}
-
-/*
- * Routine for handling various errors/conditions.
- * Note how they are "glued into the decoder" by
- * overriding the definitions used by the decoder.
- */
-
-static void
-Fax3Unexpected(const char* module, TIFF* tif, uint32 line, uint32 a0)
-{
-	TIFFErrorExt(tif->tif_clientdata, module, "%s: Bad code word at line %u of %s %u (x %u)",
-		     tif->tif_name, line, isTiled(tif) ? "tile" : "strip",
-		     (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip),
-		     a0);
-}
-#define	unexpected(table, a0)	Fax3Unexpected(module, tif, sp->line, a0)
-
-static void
-Fax3Extension(const char* module, TIFF* tif, uint32 line, uint32 a0)
-{
-	TIFFErrorExt(tif->tif_clientdata, module,
-		     "%s: Uncompressed data (not supported) at line %u of %s %u (x %u)",
-		     tif->tif_name, line, isTiled(tif) ? "tile" : "strip",
-		     (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip),
-		     a0);
-}
-#define	extension(a0)	Fax3Extension(module, tif, sp->line, a0)
-
-static void
-Fax3BadLength(const char* module, TIFF* tif, uint32 line, uint32 a0, uint32 lastx)
-{
-	TIFFWarningExt(tif->tif_clientdata, module, "%s: %s at line %u of %s %u (got %u, expected %u)",
-		       tif->tif_name,
-		       a0 < lastx ? "Premature EOL" : "Line length mismatch",
-		       line, isTiled(tif) ? "tile" : "strip",
-		       (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip),
-		       a0, lastx);
-}
-#define	badlength(a0,lastx)	Fax3BadLength(module, tif, sp->line, a0, lastx)
-
-static void
-Fax3PrematureEOF(const char* module, TIFF* tif, uint32 line, uint32 a0)
-{
-	TIFFWarningExt(tif->tif_clientdata, module, "%s: Premature EOF at line %u of %s %u (x %u)",
-	    tif->tif_name,
-		       line, isTiled(tif) ? "tile" : "strip",
-		       (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip),
-		       a0);
-}
-#define	prematureEOF(a0)	Fax3PrematureEOF(module, tif, sp->line, a0)
-
-#define	Nop
-
-/*
- * Decode the requested amount of G3 1D-encoded data.
- */
-static int
-Fax3Decode1D(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
-	DECLARE_STATE(tif, sp, "Fax3Decode1D");
-
-	(void) s;
-	CACHE_STATE(tif, sp);
-	thisrun = sp->curruns;
-	while ((long)occ > 0) {
-		a0 = 0;
-		RunLength = 0;
-		pa = thisrun;
-#ifdef FAX3_DEBUG
-		printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail);
-		printf("-------------------- %d\n", tif->tif_row);
-		fflush(stdout);
-#endif
-		SYNC_EOL(EOF1D);
-		EXPAND1D(EOF1Da);
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		buf += sp->b.rowbytes;
-		occ -= sp->b.rowbytes;
-		sp->line++;
-		continue;
-	EOF1D:				/* premature EOF */
-		CLEANUP_RUNS();
-	EOF1Da:				/* premature EOF */
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		UNCACHE_STATE(tif, sp);
-		return (-1);
-	}
-	UNCACHE_STATE(tif, sp);
-	return (1);
-}
-
-#define	SWAP(t,a,b)	{ t x; x = (a); (a) = (b); (b) = x; }
-/*
- * Decode the requested amount of G3 2D-encoded data.
- */
-static int
-Fax3Decode2D(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
-	DECLARE_STATE_2D(tif, sp, "Fax3Decode2D");
-	int is1D;			/* current line is 1d/2d-encoded */
-
-	(void) s;
-	CACHE_STATE(tif, sp);
-	while ((long)occ > 0) {
-		a0 = 0;
-		RunLength = 0;
-		pa = thisrun = sp->curruns;
-#ifdef FAX3_DEBUG
-		printf("\nBitAcc=%08X, BitsAvail = %d EOLcnt = %d",
-		    BitAcc, BitsAvail, EOLcnt);
-#endif
-		SYNC_EOL(EOF2D);
-		NeedBits8(1, EOF2D);
-		is1D = GetBits(1);	/* 1D/2D-encoding tag bit */
-		ClrBits(1);
-#ifdef FAX3_DEBUG
-		printf(" %s\n-------------------- %d\n",
-		    is1D ? "1D" : "2D", tif->tif_row);
-		fflush(stdout);
-#endif
-		pb = sp->refruns;
-		b1 = *pb++;
-		if (is1D)
-			EXPAND1D(EOF2Da);
-		else
-			EXPAND2D(EOF2Da);
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		SETVALUE(0);		/* imaginary change for reference */
-		SWAP(uint32*, sp->curruns, sp->refruns);
-		buf += sp->b.rowbytes;
-		occ -= sp->b.rowbytes;
-		sp->line++;
-		continue;
-	EOF2D:				/* premature EOF */
-		CLEANUP_RUNS();
-	EOF2Da:				/* premature EOF */
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		UNCACHE_STATE(tif, sp);
-		return (-1);
-	}
-	UNCACHE_STATE(tif, sp);
-	return (1);
-}
-#undef SWAP
-
-/*
- * The ZERO & FILL macros must handle spans < 2*sizeof(long) bytes.
- * For machines with 64-bit longs this is <16 bytes; otherwise
- * this is <8 bytes.  We optimize the code here to reflect the
- * machine characteristics.
- */
-#if SIZEOF_LONG == 8
-# define FILL(n, cp)							    \
-    switch (n) {							    \
-    case 15:(cp)[14] = 0xff; case 14:(cp)[13] = 0xff; case 13: (cp)[12] = 0xff;\
-    case 12:(cp)[11] = 0xff; case 11:(cp)[10] = 0xff; case 10: (cp)[9] = 0xff;\
-    case  9: (cp)[8] = 0xff; case  8: (cp)[7] = 0xff; case  7: (cp)[6] = 0xff;\
-    case  6: (cp)[5] = 0xff; case  5: (cp)[4] = 0xff; case  4: (cp)[3] = 0xff;\
-    case  3: (cp)[2] = 0xff; case  2: (cp)[1] = 0xff;			      \
-    case  1: (cp)[0] = 0xff; (cp) += (n); case 0:  ;			      \
-    }
-# define ZERO(n, cp)							\
-    switch (n) {							\
-    case 15:(cp)[14] = 0; case 14:(cp)[13] = 0; case 13: (cp)[12] = 0;	\
-    case 12:(cp)[11] = 0; case 11:(cp)[10] = 0; case 10: (cp)[9] = 0;	\
-    case  9: (cp)[8] = 0; case  8: (cp)[7] = 0; case  7: (cp)[6] = 0;	\
-    case  6: (cp)[5] = 0; case  5: (cp)[4] = 0; case  4: (cp)[3] = 0;	\
-    case  3: (cp)[2] = 0; case  2: (cp)[1] = 0;				\
-    case  1: (cp)[0] = 0; (cp) += (n); case 0:  ;			\
-    }
-#else
-# define FILL(n, cp)							    \
-    switch (n) {							    \
-    case 7: (cp)[6] = 0xff; case 6: (cp)[5] = 0xff; case 5: (cp)[4] = 0xff; \
-    case 4: (cp)[3] = 0xff; case 3: (cp)[2] = 0xff; case 2: (cp)[1] = 0xff; \
-    case 1: (cp)[0] = 0xff; (cp) += (n); case 0:  ;			    \
-    }
-# define ZERO(n, cp)							\
-    switch (n) {							\
-    case 7: (cp)[6] = 0; case 6: (cp)[5] = 0; case 5: (cp)[4] = 0;	\
-    case 4: (cp)[3] = 0; case 3: (cp)[2] = 0; case 2: (cp)[1] = 0;	\
-    case 1: (cp)[0] = 0; (cp) += (n); case 0:  ;			\
-    }
-#endif
-
-/*
- * Bit-fill a row according to the white/black
- * runs generated during G3/G4 decoding.
- */
-void
-_TIFFFax3fillruns(unsigned char* buf, uint32* runs, uint32* erun, uint32 lastx)
-{
-	static const unsigned char _fillmasks[] =
-	    { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
-	unsigned char* cp;
-	uint32 x, bx, run;
-	int32 n, nw;
-	long* lp;
-
-	if ((erun-runs)&1)
-	    *erun++ = 0;
-	x = 0;
-	for (; runs < erun; runs += 2) {
-	    run = runs[0];
-	    if (x+run > lastx || run > lastx )
-		run = runs[0] = (uint32) (lastx - x);
-	    if (run) {
-		cp = buf + (x>>3);
-		bx = x&7;
-		if (run > 8-bx) {
-		    if (bx) {			/* align to byte boundary */
-			*cp++ &= 0xff << (8-bx);
-			run -= 8-bx;
-		    }
-		    if( (n = run >> 3) != 0 ) {	/* multiple bytes to fill */
-			if ((n/sizeof (long)) > 1) {
-			    /*
-			     * Align to longword boundary and fill.
-			     */
-			    for (; n && !isAligned(cp, long); n--)
-				    *cp++ = 0x00;
-			    lp = (long*) cp;
-			    nw = (int32)(n / sizeof (long));
-			    n -= nw * sizeof (long);
-			    do {
-				    *lp++ = 0L;
-			    } while (--nw);
-			    cp = (unsigned char*) lp;
-			}
-			ZERO(n, cp);
-			run &= 7;
-		    }
-		    if (run)
-			cp[0] &= 0xff >> run;
-		} else
-		    cp[0] &= ~(_fillmasks[run]>>bx);
-		x += runs[0];
-	    }
-	    run = runs[1];
-	    if (x+run > lastx || run > lastx )
-		run = runs[1] = lastx - x;
-	    if (run) {
-		cp = buf + (x>>3);
-		bx = x&7;
-		if (run > 8-bx) {
-		    if (bx) {			/* align to byte boundary */
-			*cp++ |= 0xff >> bx;
-			run -= 8-bx;
-		    }
-		    if( (n = run>>3) != 0 ) {	/* multiple bytes to fill */
-			if ((n/sizeof (long)) > 1) {
-			    /*
-			     * Align to longword boundary and fill.
-			     */
-			    for (; n && !isAligned(cp, long); n--)
-				*cp++ = 0xff;
-			    lp = (long*) cp;
-			    nw = (int32)(n / sizeof (long));
-			    n -= nw * sizeof (long);
-			    do {
-				*lp++ = -1L;
-			    } while (--nw);
-			    cp = (unsigned char*) lp;
-			}
-			FILL(n, cp);
-			run &= 7;
-		    }
-		    if (run)
-			cp[0] |= 0xff00 >> run;
-		} else
-		    cp[0] |= _fillmasks[run]>>bx;
-		x += runs[1];
-	    }
-	}
-	assert(x == lastx);
-}
-#undef	ZERO
-#undef	FILL
-
-/*
- * Setup G3/G4-related compression/decompression state
- * before data is processed.  This routine is called once
- * per image -- it sets up different state based on whether
- * or not decoding or encoding is being done and whether
- * 1D- or 2D-encoded data is involved.
- */
-static int
-Fax3SetupState(TIFF* tif)
-{
-	TIFFDirectory* td = &tif->tif_dir;
-	Fax3BaseState* sp = Fax3State(tif);
-	int needsRefLine;
-	Fax3CodecState* dsp = (Fax3CodecState*) Fax3State(tif);
-	uint32 rowbytes, rowpixels, nruns;
-
-	if (td->td_bitspersample != 1) {
-		TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-		    "Bits/sample must be 1 for Group 3/4 encoding/decoding");
-		return (0);
-	}
-	/*
-	 * Calculate the scanline/tile widths.
-	 */
-	if (isTiled(tif)) {
-		rowbytes = TIFFTileRowSize(tif);
-		rowpixels = td->td_tilewidth;
-	} else {
-		rowbytes = TIFFScanlineSize(tif);
-		rowpixels = td->td_imagewidth;
-	}
-	sp->rowbytes = (uint32) rowbytes;
-	sp->rowpixels = (uint32) rowpixels;
-	/*
-	 * Allocate any additional space required for decoding/encoding.
-	 */
-	needsRefLine = (
-	    (sp->groupoptions & GROUP3OPT_2DENCODING) ||
-	    td->td_compression == COMPRESSION_CCITTFAX4
-	);
-
-	/*
-	  Assure that allocation computations do not overflow.
-  
-	  TIFFroundup and TIFFSafeMultiply return zero on integer overflow
-	*/
-	dsp->runs=(uint32*) NULL;
-	nruns = TIFFroundup(rowpixels,32);
-	if (needsRefLine) {
-		nruns = TIFFSafeMultiply(uint32,nruns,2);
-	}
-	if ((nruns == 0) || (TIFFSafeMultiply(uint32,nruns,2) == 0)) {
-		TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
-			     "Row pixels integer overflow (rowpixels %u)",
-			     rowpixels);
-		return (0);
-	}
-	dsp->runs = (uint32*) _TIFFCheckMalloc(tif,
-					       TIFFSafeMultiply(uint32,nruns,2),
-					       sizeof (uint32),
-					       "for Group 3/4 run arrays");
-	if (dsp->runs == NULL)
-		return (0);
-	dsp->curruns = dsp->runs;
-	if (needsRefLine)
-		dsp->refruns = dsp->runs + nruns;
-	else
-		dsp->refruns = NULL;
-	if (td->td_compression == COMPRESSION_CCITTFAX3
-	    && is2DEncoding(dsp)) {	/* NB: default is 1D routine */
-		tif->tif_decoderow = Fax3Decode2D;
-		tif->tif_decodestrip = Fax3Decode2D;
-		tif->tif_decodetile = Fax3Decode2D;
-	}
-
-	if (needsRefLine) {		/* 2d encoding */
-		Fax3CodecState* esp = EncoderState(tif);
-		/*
-		 * 2d encoding requires a scanline
-		 * buffer for the ``reference line''; the
-		 * scanline against which delta encoding
-		 * is referenced.  The reference line must
-		 * be initialized to be ``white'' (done elsewhere).
-		 */
-		esp->refline = (unsigned char*) _TIFFmalloc(rowbytes);
-		if (esp->refline == NULL) {
-			TIFFErrorExt(tif->tif_clientdata, "Fax3SetupState",
-			    "%s: No space for Group 3/4 reference line",
-			    tif->tif_name);
-			return (0);
-		}
-	} else					/* 1d encoding */
-		EncoderState(tif)->refline = NULL;
-
-	return (1);
-}
-
-/*
- * CCITT Group 3 FAX Encoding.
- */
-
-#define	Fax3FlushBits(tif, sp) {				\
-	if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize)		\
-		(void) TIFFFlushData1(tif);			\
-	*(tif)->tif_rawcp++ = (tidataval_t) (sp)->data;		\
-	(tif)->tif_rawcc++;					\
-	(sp)->data = 0, (sp)->bit = 8;				\
-}
-#define	_FlushBits(tif) {					\
-	if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize)		\
-		(void) TIFFFlushData1(tif);			\
-	*(tif)->tif_rawcp++ = (tidataval_t) data;		\
-	(tif)->tif_rawcc++;					\
-	data = 0, bit = 8;					\
-}
-static const int _msbmask[9] =
-    { 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff };
-#define	_PutBits(tif, bits, length) {				\
-	while (length > bit) {					\
-		data |= bits >> (length - bit);			\
-		length -= bit;					\
-		_FlushBits(tif);				\
-	}							\
-	data |= (bits & _msbmask[length]) << (bit - length);	\
-	bit -= length;						\
-	if (bit == 0)						\
-		_FlushBits(tif);				\
-}
-	
-/*
- * Write a variable-length bit-value to
- * the output stream.  Values are
- * assumed to be at most 16 bits.
- */
-static void
-Fax3PutBits(TIFF* tif, unsigned int bits, unsigned int length)
-{
-	Fax3CodecState* sp = EncoderState(tif);
-	unsigned int bit = sp->bit;
-	int data = sp->data;
-
-	_PutBits(tif, bits, length);
-
-	sp->data = data;
-	sp->bit = bit;
-}
-
-/*
- * Write a code to the output stream.
- */
-#define putcode(tif, te)	Fax3PutBits(tif, (te)->code, (te)->length)
-
-#ifdef FAX3_DEBUG
-#define	DEBUG_COLOR(w) (tab == TIFFFaxWhiteCodes ? w "W" : w "B")
-#define	DEBUG_PRINT(what,len) {						\
-    int t;								\
-    printf("%08X/%-2d: %s%5d\t", data, bit, DEBUG_COLOR(what), len);	\
-    for (t = length-1; t >= 0; t--)					\
-	putchar(code & (1<<t) ? '1' : '0');				\
-    putchar('\n');							\
-}
-#endif
-
-/*
- * Write the sequence of codes that describes
- * the specified span of zero's or one's.  The
- * appropriate table that holds the make-up and
- * terminating codes is supplied.
- */
-static void
-putspan(TIFF* tif, int32 span, const tableentry* tab)
-{
-	Fax3CodecState* sp = EncoderState(tif);
-	unsigned int bit = sp->bit;
-	int data = sp->data;
-	unsigned int code, length;
-
-	while (span >= 2624) {
-		const tableentry* te = &tab[63 + (2560>>6)];
-		code = te->code, length = te->length;
-#ifdef FAX3_DEBUG
-		DEBUG_PRINT("MakeUp", te->runlen);
-#endif
-		_PutBits(tif, code, length);
-		span -= te->runlen;
-	}
-	if (span >= 64) {
-		const tableentry* te = &tab[63 + (span>>6)];
-		assert(te->runlen == 64*(span>>6));
-		code = te->code, length = te->length;
-#ifdef FAX3_DEBUG
-		DEBUG_PRINT("MakeUp", te->runlen);
-#endif
-		_PutBits(tif, code, length);
-		span -= te->runlen;
-	}
-	code = tab[span].code, length = tab[span].length;
-#ifdef FAX3_DEBUG
-	DEBUG_PRINT("  Term", tab[span].runlen);
-#endif
-	_PutBits(tif, code, length);
-
-	sp->data = data;
-	sp->bit = bit;
-}
-
-/*
- * Write an EOL code to the output stream.  The zero-fill
- * logic for byte-aligning encoded scanlines is handled
- * here.  We also handle writing the tag bit for the next
- * scanline when doing 2d encoding.
- */
-static void
-Fax3PutEOL(TIFF* tif)
-{
-	Fax3CodecState* sp = EncoderState(tif);
-	unsigned int bit = sp->bit;
-	int data = sp->data;
-	unsigned int code, length, tparm;
-
-	if (sp->b.groupoptions & GROUP3OPT_FILLBITS) {
-		/*
-		 * Force bit alignment so EOL will terminate on
-		 * a byte boundary.  That is, force the bit alignment
-		 * to 16-12 = 4 before putting out the EOL code.
-		 */
-		int align = 8 - 4;
-		if (align != sp->bit) {
-			if (align > sp->bit)
-				align = sp->bit + (8 - align);
-			else
-				align = sp->bit - align;
-			code = 0;
-			tparm=align; 
-			_PutBits(tif, 0, tparm);
-		}
-	}
-	code = EOL, length = 12;
-	if (is2DEncoding(sp))
-		code = (code<<1) | (sp->tag == G3_1D), length++;
-	_PutBits(tif, code, length);
-
-	sp->data = data;
-	sp->bit = bit;
-}
-
-/*
- * Reset encoding state at the start of a strip.
- */
-static int
-Fax3PreEncode(TIFF* tif, tsample_t s)
-{
-	Fax3CodecState* sp = EncoderState(tif);
-
-	(void) s;
-	assert(sp != NULL);
-	sp->bit = 8;
-	sp->data = 0;
-	sp->tag = G3_1D;
-	/*
-	 * This is necessary for Group 4; otherwise it isn't
-	 * needed because the first scanline of each strip ends
-	 * up being copied into the refline.
-	 */
-	if (sp->refline)
-		_TIFFmemset(sp->refline, 0x00, sp->b.rowbytes);
-	if (is2DEncoding(sp)) {
-		float res = tif->tif_dir.td_yresolution;
-		/*
-		 * The CCITT spec says that when doing 2d encoding, you
-		 * should only do it on K consecutive scanlines, where K
-		 * depends on the resolution of the image being encoded
-		 * (2 for <= 200 lpi, 4 for > 200 lpi).  Since the directory
-		 * code initializes td_yresolution to 0, this code will
-		 * select a K of 2 unless the YResolution tag is set
-		 * appropriately.  (Note also that we fudge a little here
-		 * and use 150 lpi to avoid problems with units conversion.)
-		 */
-		if (tif->tif_dir.td_resolutionunit == RESUNIT_CENTIMETER)
-			res *= 2.54f;		/* convert to inches */
-		sp->maxk = (res > 150 ? 4 : 2);
-		sp->k = sp->maxk-1;
-	} else
-		sp->k = sp->maxk = 0;
-	sp->line = 0;
-	return (1);
-}
-
-static const unsigned char zeroruns[256] = {
-    8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4,	/* 0x00 - 0x0f */
-    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,	/* 0x10 - 0x1f */
-    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,	/* 0x20 - 0x2f */
-    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,	/* 0x30 - 0x3f */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0x40 - 0x4f */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0x50 - 0x5f */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0x60 - 0x6f */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0x70 - 0x7f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x80 - 0x8f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x90 - 0x9f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0xa0 - 0xaf */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0xb0 - 0xbf */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0xc0 - 0xcf */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0xd0 - 0xdf */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0xe0 - 0xef */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0xf0 - 0xff */
-};
-static const unsigned char oneruns[256] = {
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x00 - 0x0f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x10 - 0x1f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x20 - 0x2f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x30 - 0x3f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x40 - 0x4f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x50 - 0x5f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x60 - 0x6f */
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0x70 - 0x7f */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0x80 - 0x8f */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0x90 - 0x9f */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0xa0 - 0xaf */
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	/* 0xb0 - 0xbf */
-    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,	/* 0xc0 - 0xcf */
-    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,	/* 0xd0 - 0xdf */
-    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,	/* 0xe0 - 0xef */
-    4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8,	/* 0xf0 - 0xff */
-};
-
-/*
- * On certain systems it pays to inline
- * the routines that find pixel spans.
- */
-#ifdef VAXC
-static	int32 find0span(unsigned char*, int32, int32);
-static	int32 find1span(unsigned char*, int32, int32);
-#pragma inline(find0span,find1span)
-#endif
-
-/*
- * Find a span of ones or zeros using the supplied
- * table.  The ``base'' of the bit string is supplied
- * along with the start+end bit indices.
- */
-static int32
-find0span(unsigned char* bp, int32 bs, int32 be)
-{
-	int32 bits = be - bs;
-	int32 n, span;
-
-	bp += bs>>3;
-	/*
-	 * Check partial byte on lhs.
-	 */
-	if (bits > 0 && (n = (bs & 7))) {
-		span = zeroruns[(*bp << n) & 0xff];
-		if (span > 8-n)		/* table value too generous */
-			span = 8-n;
-		if (span > bits)	/* constrain span to bit range */
-			span = bits;
-		if (n+span < 8)		/* doesn't extend to edge of byte */
-			return (span);
-		bits -= span;
-		bp++;
-	} else
-		span = 0;
-	if (bits >= (int32)(2 * 8 * sizeof(long))) {
-		long* lp;
-		/*
-		 * Align to longword boundary and check longwords.
-		 */
-		while (!isAligned(bp, long)) {
-			if (*bp != 0x00)
-				return (span + zeroruns[*bp]);
-			span += 8, bits -= 8;
-			bp++;
-		}
-		lp = (long*) bp;
-		while ((bits >= (int32)(8 * sizeof(long))) && (0 == *lp)) {
-			span += 8*sizeof (long), bits -= 8*sizeof (long);
-			lp++;
-		}
-		bp = (unsigned char*) lp;
-	}
-	/*
-	 * Scan full bytes for all 0's.
-	 */
-	while (bits >= 8) {
-		if (*bp != 0x00)	/* end of run */
-			return (span + zeroruns[*bp]);
-		span += 8, bits -= 8;
-		bp++;
-	}
-	/*
-	 * Check partial byte on rhs.
-	 */
-	if (bits > 0) {
-		n = zeroruns[*bp];
-		span += (n > bits ? bits : n);
-	}
-	return (span);
-}
-
-static int32
-find1span(unsigned char* bp, int32 bs, int32 be)
-{
-	int32 bits = be - bs;
-	int32 n, span;
-
-	bp += bs>>3;
-	/*
-	 * Check partial byte on lhs.
-	 */
-	if (bits > 0 && (n = (bs & 7))) {
-		span = oneruns[(*bp << n) & 0xff];
-		if (span > 8-n)		/* table value too generous */
-			span = 8-n;
-		if (span > bits)	/* constrain span to bit range */
-			span = bits;
-		if (n+span < 8)		/* doesn't extend to edge of byte */
-			return (span);
-		bits -= span;
-		bp++;
-	} else
-		span = 0;
-	if (bits >= (int32)(2 * 8 * sizeof(long))) {
-		long* lp;
-		/*
-		 * Align to longword boundary and check longwords.
-		 */
-		while (!isAligned(bp, long)) {
-			if (*bp != 0xff)
-				return (span + oneruns[*bp]);
-			span += 8, bits -= 8;
-			bp++;
-		}
-		lp = (long*) bp;
-		while ((bits >= (int32)(8 * sizeof(long))) && (~0 == *lp)) {
-			span += 8*sizeof (long), bits -= 8*sizeof (long);
-			lp++;
-		}
-		bp = (unsigned char*) lp;
-	}
-	/*
-	 * Scan full bytes for all 1's.
-	 */
-	while (bits >= 8) {
-		if (*bp != 0xff)	/* end of run */
-			return (span + oneruns[*bp]);
-		span += 8, bits -= 8;
-		bp++;
-	}
-	/*
-	 * Check partial byte on rhs.
-	 */
-	if (bits > 0) {
-		n = oneruns[*bp];
-		span += (n > bits ? bits : n);
-	}
-	return (span);
-}
-
-/*
- * Return the offset of the next bit in the range
- * [bs..be] that is different from the specified
- * color.  The end, be, is returned if no such bit
- * exists.
- */
-#define	finddiff(_cp, _bs, _be, _color)	\
-	(_bs + (_color ? find1span(_cp,_bs,_be) : find0span(_cp,_bs,_be)))
-/*
- * Like finddiff, but also check the starting bit
- * against the end in case start > end.
- */
-#define	finddiff2(_cp, _bs, _be, _color) \
-	(_bs < _be ? finddiff(_cp,_bs,_be,_color) : _be)
-
-/*
- * 1d-encode a row of pixels.  The encoding is
- * a sequence of all-white or all-black spans
- * of pixels encoded with Huffman codes.
- */
-static int
-Fax3Encode1DRow(TIFF* tif, unsigned char* bp, uint32 bits)
-{
-	Fax3CodecState* sp = EncoderState(tif);
-	int32 span;
-        uint32 bs = 0;
-
-	for (;;) {
-		span = find0span(bp, bs, bits);		/* white span */
-		putspan(tif, span, TIFFFaxWhiteCodes);
-		bs += span;
-		if (bs >= bits)
-			break;
-		span = find1span(bp, bs, bits);		/* black span */
-		putspan(tif, span, TIFFFaxBlackCodes);
-		bs += span;
-		if (bs >= bits)
-			break;
-	}
-	if (sp->b.mode & (FAXMODE_BYTEALIGN|FAXMODE_WORDALIGN)) {
-		if (sp->bit != 8)			/* byte-align */
-			Fax3FlushBits(tif, sp);
-		if ((sp->b.mode&FAXMODE_WORDALIGN) &&
-		    !isAligned(tif->tif_rawcp, uint16))
-			Fax3FlushBits(tif, sp);
-	}
-	return (1);
-}
-
-static const tableentry horizcode =
-    { 3, 0x1, 0 };	/* 001 */
-static const tableentry passcode =
-    { 4, 0x1, 0 };	/* 0001 */
-static const tableentry vcodes[7] = {
-    { 7, 0x03, 0 },	/* 0000 011 */
-    { 6, 0x03, 0 },	/* 0000 11 */
-    { 3, 0x03, 0 },	/* 011 */
-    { 1, 0x1, 0 },	/* 1 */
-    { 3, 0x2, 0 },	/* 010 */
-    { 6, 0x02, 0 },	/* 0000 10 */
-    { 7, 0x02, 0 }	/* 0000 010 */
-};
-
-/*
- * 2d-encode a row of pixels.  Consult the CCITT
- * documentation for the algorithm.
- */
-static int
-Fax3Encode2DRow(TIFF* tif, unsigned char* bp, unsigned char* rp, uint32 bits)
-{
-#define	PIXEL(buf,ix)	((((buf)[(ix)>>3]) >> (7-((ix)&7))) & 1)
-        uint32 a0 = 0;
-	uint32 a1 = (PIXEL(bp, 0) != 0 ? 0 : finddiff(bp, 0, bits, 0));
-	uint32 b1 = (PIXEL(rp, 0) != 0 ? 0 : finddiff(rp, 0, bits, 0));
-	uint32 a2, b2;
-
-	for (;;) {
-		b2 = finddiff2(rp, b1, bits, PIXEL(rp,b1));
-		if (b2 >= a1) {
-			int32 d = b1 - a1;
-			if (!(-3 <= d && d <= 3)) {	/* horizontal mode */
-				a2 = finddiff2(bp, a1, bits, PIXEL(bp,a1));
-				putcode(tif, &horizcode);
-				if (a0+a1 == 0 || PIXEL(bp, a0) == 0) {
-					putspan(tif, a1-a0, TIFFFaxWhiteCodes);
-					putspan(tif, a2-a1, TIFFFaxBlackCodes);
-				} else {
-					putspan(tif, a1-a0, TIFFFaxBlackCodes);
-					putspan(tif, a2-a1, TIFFFaxWhiteCodes);
-				}
-				a0 = a2;
-			} else {			/* vertical mode */
-				putcode(tif, &vcodes[d+3]);
-				a0 = a1;
-			}
-		} else {				/* pass mode */
-			putcode(tif, &passcode);
-			a0 = b2;
-		}
-		if (a0 >= bits)
-			break;
-		a1 = finddiff(bp, a0, bits, PIXEL(bp,a0));
-		b1 = finddiff(rp, a0, bits, !PIXEL(bp,a0));
-		b1 = finddiff(rp, b1, bits, PIXEL(bp,a0));
-	}
-	return (1);
-#undef PIXEL
-}
-
-/*
- * Encode a buffer of pixels.
- */
-static int
-Fax3Encode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
-{
-	Fax3CodecState* sp = EncoderState(tif);
-
-	(void) s;
-	while ((long)cc > 0) {
-		if ((sp->b.mode & FAXMODE_NOEOL) == 0)
-			Fax3PutEOL(tif);
-		if (is2DEncoding(sp)) {
-			if (sp->tag == G3_1D) {
-				if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels))
-					return (0);
-				sp->tag = G3_2D;
-			} else {
-				if (!Fax3Encode2DRow(tif, bp, sp->refline,
-                                                     sp->b.rowpixels))
-					return (0);
-				sp->k--;
-			}
-			if (sp->k == 0) {
-				sp->tag = G3_1D;
-				sp->k = sp->maxk-1;
-			} else
-				_TIFFmemcpy(sp->refline, bp, sp->b.rowbytes);
-		} else {
-			if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels))
-				return (0);
-		}
-		bp += sp->b.rowbytes;
-		cc -= sp->b.rowbytes;
-	}
-	return (1);
-}
-
-static int
-Fax3PostEncode(TIFF* tif)
-{
-	Fax3CodecState* sp = EncoderState(tif);
-
-	if (sp->bit != 8)
-		Fax3FlushBits(tif, sp);
-	return (1);
-}
-
-static void
-Fax3Close(TIFF* tif)
-{
-	if ((Fax3State(tif)->mode & FAXMODE_NORTC) == 0) {
-		Fax3CodecState* sp = EncoderState(tif);
-		unsigned int code = EOL;
-		unsigned int length = 12;
-		int i;
-
-		if (is2DEncoding(sp))
-			code = (code<<1) | (sp->tag == G3_1D), length++;
-		for (i = 0; i < 6; i++)
-			Fax3PutBits(tif, code, length);
-		Fax3FlushBits(tif, sp);
-	}
-}
-
-static void
-Fax3Cleanup(TIFF* tif)
-{
-	Fax3CodecState* sp = DecoderState(tif);
-	
-	assert(sp != 0);
-
-	tif->tif_tagmethods.vgetfield = sp->b.vgetparent;
-	tif->tif_tagmethods.vsetfield = sp->b.vsetparent;
-	tif->tif_tagmethods.printdir = sp->b.printdir;
-
-	if (sp->runs)
-		_TIFFfree(sp->runs);
-	if (sp->refline)
-		_TIFFfree(sp->refline);
-
-	if (Fax3State(tif)->subaddress)
-		_TIFFfree(Fax3State(tif)->subaddress);
-	if (Fax3State(tif)->faxdcs)
-		_TIFFfree(Fax3State(tif)->faxdcs);
-
-	_TIFFfree(tif->tif_data);
-	tif->tif_data = NULL;
-
-	_TIFFSetDefaultCompressionState(tif);
-}
-
-#define	FIELD_BADFAXLINES	(FIELD_CODEC+0)
-#define	FIELD_CLEANFAXDATA	(FIELD_CODEC+1)
-#define	FIELD_BADFAXRUN		(FIELD_CODEC+2)
-#define	FIELD_RECVPARAMS	(FIELD_CODEC+3)
-#define	FIELD_SUBADDRESS	(FIELD_CODEC+4)
-#define	FIELD_RECVTIME		(FIELD_CODEC+5)
-#define	FIELD_FAXDCS		(FIELD_CODEC+6)
-
-#define	FIELD_OPTIONS		(FIELD_CODEC+7)
-
-static const TIFFFieldInfo faxFieldInfo[] = {
-    { TIFFTAG_FAXMODE,		 0, 0,	TIFF_ANY,	FIELD_PSEUDO,
-      FALSE,	FALSE,	"FaxMode" },
-    { TIFFTAG_FAXFILLFUNC,	 0, 0,	TIFF_ANY,	FIELD_PSEUDO,
-      FALSE,	FALSE,	"FaxFillFunc" },
-    { TIFFTAG_BADFAXLINES,	 1, 1,	TIFF_LONG,	FIELD_BADFAXLINES,
-      TRUE,	FALSE,	"BadFaxLines" },
-    { TIFFTAG_BADFAXLINES,	 1, 1,	TIFF_SHORT,	FIELD_BADFAXLINES,
-      TRUE,	FALSE,	"BadFaxLines" },
-    { TIFFTAG_CLEANFAXDATA,	 1, 1,	TIFF_SHORT,	FIELD_CLEANFAXDATA,
-      TRUE,	FALSE,	"CleanFaxData" },
-    { TIFFTAG_CONSECUTIVEBADFAXLINES,1,1, TIFF_LONG,	FIELD_BADFAXRUN,
-      TRUE,	FALSE,	"ConsecutiveBadFaxLines" },
-    { TIFFTAG_CONSECUTIVEBADFAXLINES,1,1, TIFF_SHORT,	FIELD_BADFAXRUN,
-      TRUE,	FALSE,	"ConsecutiveBadFaxLines" },
-    { TIFFTAG_FAXRECVPARAMS,	 1, 1, TIFF_LONG,	FIELD_RECVPARAMS,
-      TRUE,	FALSE,	"FaxRecvParams" },
-    { TIFFTAG_FAXSUBADDRESS,	-1,-1, TIFF_ASCII,	FIELD_SUBADDRESS,
-      TRUE,	FALSE,	"FaxSubAddress" },
-    { TIFFTAG_FAXRECVTIME,	 1, 1, TIFF_LONG,	FIELD_RECVTIME,
-      TRUE,	FALSE,	"FaxRecvTime" },
-    { TIFFTAG_FAXDCS,		-1,-1, TIFF_ASCII,	FIELD_FAXDCS,
-      TRUE,	FALSE,	"FaxDcs" },
-};
-static const TIFFFieldInfo fax3FieldInfo[] = {
-    { TIFFTAG_GROUP3OPTIONS,	 1, 1,	TIFF_LONG,	FIELD_OPTIONS,
-      FALSE,	FALSE,	"Group3Options" },
-};
-static const TIFFFieldInfo fax4FieldInfo[] = {
-    { TIFFTAG_GROUP4OPTIONS,	 1, 1,	TIFF_LONG,	FIELD_OPTIONS,
-      FALSE,	FALSE,	"Group4Options" },
-};
-#define	N(a)	(sizeof (a) / sizeof (a[0]))
-
-static int
-Fax3VSetField(TIFF* tif, ttag_t tag, va_list ap)
-{
-	Fax3BaseState* sp = Fax3State(tif);
-	const TIFFFieldInfo* fip;
-
-	assert(sp != 0);
-	assert(sp->vsetparent != 0);
-
-	switch (tag) {
-	case TIFFTAG_FAXMODE:
-		sp->mode = va_arg(ap, int);
-		return 1;			/* NB: pseudo tag */
-	case TIFFTAG_FAXFILLFUNC:
-		DecoderState(tif)->fill = va_arg(ap, TIFFFaxFillFunc);
-		return 1;			/* NB: pseudo tag */
-	case TIFFTAG_GROUP3OPTIONS:
-		/* XXX: avoid reading options if compression mismatches. */
-		if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX3)
-			sp->groupoptions = va_arg(ap, uint32);
-		break;
-	case TIFFTAG_GROUP4OPTIONS:
-		/* XXX: avoid reading options if compression mismatches. */
-		if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4)
-			sp->groupoptions = va_arg(ap, uint32);
-		break;
-	case TIFFTAG_BADFAXLINES:
-		sp->badfaxlines = va_arg(ap, uint32);
-		break;
-	case TIFFTAG_CLEANFAXDATA:
-		sp->cleanfaxdata = (uint16) va_arg(ap, int);
-		break;
-	case TIFFTAG_CONSECUTIVEBADFAXLINES:
-		sp->badfaxrun = va_arg(ap, uint32);
-		break;
-	case TIFFTAG_FAXRECVPARAMS:
-		sp->recvparams = va_arg(ap, uint32);
-		break;
-	case TIFFTAG_FAXSUBADDRESS:
-		_TIFFsetString(&sp->subaddress, va_arg(ap, char*));
-		break;
-	case TIFFTAG_FAXRECVTIME:
-		sp->recvtime = va_arg(ap, uint32);
-		break;
-	case TIFFTAG_FAXDCS:
-		_TIFFsetString(&sp->faxdcs, va_arg(ap, char*));
-		break;
-	default:
-		return (*sp->vsetparent)(tif, tag, ap);
-	}
-	
-	if ((fip = _TIFFFieldWithTag(tif, tag)))
-		TIFFSetFieldBit(tif, fip->field_bit);
-	else
-		return 0;
-
-	tif->tif_flags |= TIFF_DIRTYDIRECT;
-	return 1;
-}
-
-static int
-Fax3VGetField(TIFF* tif, ttag_t tag, va_list ap)
-{
-	Fax3BaseState* sp = Fax3State(tif);
-
-	assert(sp != 0);
-
-	switch (tag) {
-	case TIFFTAG_FAXMODE:
-		*va_arg(ap, int*) = sp->mode;
-		break;
-	case TIFFTAG_FAXFILLFUNC:
-		*va_arg(ap, TIFFFaxFillFunc*) = DecoderState(tif)->fill;
-		break;
-	case TIFFTAG_GROUP3OPTIONS:
-	case TIFFTAG_GROUP4OPTIONS:
-		*va_arg(ap, uint32*) = sp->groupoptions;
-		break;
-	case TIFFTAG_BADFAXLINES:
-		*va_arg(ap, uint32*) = sp->badfaxlines;
-		break;
-	case TIFFTAG_CLEANFAXDATA:
-		*va_arg(ap, uint16*) = sp->cleanfaxdata;
-		break;
-	case TIFFTAG_CONSECUTIVEBADFAXLINES:
-		*va_arg(ap, uint32*) = sp->badfaxrun;
-		break;
-	case TIFFTAG_FAXRECVPARAMS:
-		*va_arg(ap, uint32*) = sp->recvparams;
-		break;
-	case TIFFTAG_FAXSUBADDRESS:
-		*va_arg(ap, char**) = sp->subaddress;
-		break;
-	case TIFFTAG_FAXRECVTIME:
-		*va_arg(ap, uint32*) = sp->recvtime;
-		break;
-	case TIFFTAG_FAXDCS:
-		*va_arg(ap, char**) = sp->faxdcs;
-		break;
-	default:
-		return (*sp->vgetparent)(tif, tag, ap);
-	}
-	return (1);
-}
-
-static void
-Fax3PrintDir(TIFF* tif, FILE* fd, long flags)
-{
-	Fax3BaseState* sp = Fax3State(tif);
-
-	assert(sp != 0);
-
-	(void) flags;
-	if (TIFFFieldSet(tif,FIELD_OPTIONS)) {
-		const char* sep = " ";
-		if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4) {
-			fprintf(fd, "  Group 4 Options:");
-			if (sp->groupoptions & GROUP4OPT_UNCOMPRESSED)
-				fprintf(fd, "%suncompressed data", sep);
-		} else {
-
-			fprintf(fd, "  Group 3 Options:");
-			if (sp->groupoptions & GROUP3OPT_2DENCODING)
-				fprintf(fd, "%s2-d encoding", sep), sep = "+";
-			if (sp->groupoptions & GROUP3OPT_FILLBITS)
-				fprintf(fd, "%sEOL padding", sep), sep = "+";
-			if (sp->groupoptions & GROUP3OPT_UNCOMPRESSED)
-				fprintf(fd, "%suncompressed data", sep);
-		}
-		fprintf(fd, " (%lu = 0x%lx)\n",
-                        (unsigned long) sp->groupoptions,
-                        (unsigned long) sp->groupoptions);
-	}
-	if (TIFFFieldSet(tif,FIELD_CLEANFAXDATA)) {
-		fprintf(fd, "  Fax Data:");
-		switch (sp->cleanfaxdata) {
-		case CLEANFAXDATA_CLEAN:
-			fprintf(fd, " clean");
-			break;
-		case CLEANFAXDATA_REGENERATED:
-			fprintf(fd, " receiver regenerated");
-			break;
-		case CLEANFAXDATA_UNCLEAN:
-			fprintf(fd, " uncorrected errors");
-			break;
-		}
-		fprintf(fd, " (%u = 0x%x)\n",
-		    sp->cleanfaxdata, sp->cleanfaxdata);
-	}
-	if (TIFFFieldSet(tif,FIELD_BADFAXLINES))
-		fprintf(fd, "  Bad Fax Lines: %lu\n",
-                        (unsigned long) sp->badfaxlines);
-	if (TIFFFieldSet(tif,FIELD_BADFAXRUN))
-		fprintf(fd, "  Consecutive Bad Fax Lines: %lu\n",
-		    (unsigned long) sp->badfaxrun);
-	if (TIFFFieldSet(tif,FIELD_RECVPARAMS))
-		fprintf(fd, "  Fax Receive Parameters: %08lx\n",
-		   (unsigned long) sp->recvparams);
-	if (TIFFFieldSet(tif,FIELD_SUBADDRESS))
-		fprintf(fd, "  Fax SubAddress: %s\n", sp->subaddress);
-	if (TIFFFieldSet(tif,FIELD_RECVTIME))
-		fprintf(fd, "  Fax Receive Time: %lu secs\n",
-		    (unsigned long) sp->recvtime);
-	if (TIFFFieldSet(tif,FIELD_FAXDCS))
-		fprintf(fd, "  Fax DCS: %s\n", sp->faxdcs);
-}
-
-static int
-InitCCITTFax3(TIFF* tif)
-{
-	Fax3BaseState* sp;
-
-	/*
-	 * Merge codec-specific tag information.
-	 */
-	if (!_TIFFMergeFieldInfo(tif, faxFieldInfo, N(faxFieldInfo))) {
-		TIFFErrorExt(tif->tif_clientdata, "InitCCITTFax3",
-			"Merging common CCITT Fax codec-specific tags failed");
-		return 0;
-	}
-
-	/*
-	 * Allocate state block so tag methods have storage to record values.
-	 */
-	tif->tif_data = (tidata_t)
-		_TIFFmalloc(sizeof (Fax3CodecState));
-
-	if (tif->tif_data == NULL) {
-		TIFFErrorExt(tif->tif_clientdata, "TIFFInitCCITTFax3",
-		    "%s: No space for state block", tif->tif_name);
-		return (0);
-	}
-
-	sp = Fax3State(tif);
-        sp->rw_mode = tif->tif_mode;
-
-	/*
-	 * Override parent get/set field methods.
-	 */
-	sp->vgetparent = tif->tif_tagmethods.vgetfield;
-	tif->tif_tagmethods.vgetfield = Fax3VGetField; /* hook for codec tags */
-	sp->vsetparent = tif->tif_tagmethods.vsetfield;
-	tif->tif_tagmethods.vsetfield = Fax3VSetField; /* hook for codec tags */
-	sp->printdir = tif->tif_tagmethods.printdir;
-	tif->tif_tagmethods.printdir = Fax3PrintDir;   /* hook for codec tags */
-	sp->groupoptions = 0;	
-	sp->recvparams = 0;
-	sp->subaddress = NULL;
-	sp->faxdcs = NULL;
-
-	if (sp->rw_mode == O_RDONLY) /* FIXME: improve for in place update */
-		tif->tif_flags |= TIFF_NOBITREV; /* decoder does bit reversal */
-	DecoderState(tif)->runs = NULL;
-	TIFFSetField(tif, TIFFTAG_FAXFILLFUNC, _TIFFFax3fillruns);
-	EncoderState(tif)->refline = NULL;
-
-	/*
-	 * Install codec methods.
-	 */
-	tif->tif_setupdecode = Fax3SetupState;
-	tif->tif_predecode = Fax3PreDecode;
-	tif->tif_decoderow = Fax3Decode1D;
-	tif->tif_decodestrip = Fax3Decode1D;
-	tif->tif_decodetile = Fax3Decode1D;
-	tif->tif_setupencode = Fax3SetupState;
-	tif->tif_preencode = Fax3PreEncode;
-	tif->tif_postencode = Fax3PostEncode;
-	tif->tif_encoderow = Fax3Encode;
-	tif->tif_encodestrip = Fax3Encode;
-	tif->tif_encodetile = Fax3Encode;
-	tif->tif_close = Fax3Close;
-	tif->tif_cleanup = Fax3Cleanup;
-
-	return (1);
-}
-
-int
-TIFFInitCCITTFax3(TIFF* tif, int scheme)
-{
-	(void) scheme;
-	if (InitCCITTFax3(tif)) {
-		/*
-		 * Merge codec-specific tag information.
-		 */
-		if (!_TIFFMergeFieldInfo(tif, fax3FieldInfo, N(fax3FieldInfo))) {
-			TIFFErrorExt(tif->tif_clientdata, "TIFFInitCCITTFax3",
-			"Merging CCITT Fax 3 codec-specific tags failed");
-			return 0;
-		}
-
-		/*
-		 * The default format is Class/F-style w/o RTC.
-		 */
-		return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_CLASSF);
-	} else
-		return 01;
-}
-
-/*
- * CCITT Group 4 (T.6) Facsimile-compatible
- * Compression Scheme Support.
- */
-
-#define	SWAP(t,a,b)	{ t x; x = (a); (a) = (b); (b) = x; }
-/*
- * Decode the requested amount of G4-encoded data.
- */
-static int
-Fax4Decode(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
-	DECLARE_STATE_2D(tif, sp, "Fax4Decode");
-
-	(void) s;
-	CACHE_STATE(tif, sp);
-	while ((long)occ > 0) {
-		a0 = 0;
-		RunLength = 0;
-		pa = thisrun = sp->curruns;
-		pb = sp->refruns;
-		b1 = *pb++;
-#ifdef FAX3_DEBUG
-		printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail);
-		printf("-------------------- %d\n", tif->tif_row);
-		fflush(stdout);
-#endif
-		EXPAND2D(EOFG4);
-                if (EOLcnt)
-                    goto EOFG4;
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		SETVALUE(0);		/* imaginary change for reference */
-		SWAP(uint32*, sp->curruns, sp->refruns);
-		buf += sp->b.rowbytes;
-		occ -= sp->b.rowbytes;
-		sp->line++;
-		continue;
-	EOFG4:
-                NeedBits16( 13, BADG4 );
-        BADG4:
-#ifdef FAX3_DEBUG
-                if( GetBits(13) != 0x1001 )
-                    fputs( "Bad EOFB\n", stderr );
-#endif                
-                ClrBits( 13 );
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		UNCACHE_STATE(tif, sp);
-		return ( sp->line ? 1 : -1);	/* don't error on badly-terminated strips */
-	}
-	UNCACHE_STATE(tif, sp);
-	return (1);
-}
-#undef	SWAP
-
-/*
- * Encode the requested amount of data.
- */
-static int
-Fax4Encode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
-{
-	Fax3CodecState *sp = EncoderState(tif);
-
-	(void) s;
-	while ((long)cc > 0) {
-		if (!Fax3Encode2DRow(tif, bp, sp->refline, sp->b.rowpixels))
-			return (0);
-		_TIFFmemcpy(sp->refline, bp, sp->b.rowbytes);
-		bp += sp->b.rowbytes;
-		cc -= sp->b.rowbytes;
-	}
-	return (1);
-}
-
-static int
-Fax4PostEncode(TIFF* tif)
-{
-	Fax3CodecState *sp = EncoderState(tif);
-
-	/* terminate strip w/ EOFB */
-	Fax3PutBits(tif, EOL, 12);
-	Fax3PutBits(tif, EOL, 12);
-	if (sp->bit != 8)
-		Fax3FlushBits(tif, sp);
-	return (1);
-}
-
-int
-TIFFInitCCITTFax4(TIFF* tif, int scheme)
-{
-	(void) scheme;
-	if (InitCCITTFax3(tif)) {		/* reuse G3 support */
-		/*
-		 * Merge codec-specific tag information.
-		 */
-		if (!_TIFFMergeFieldInfo(tif, fax4FieldInfo, N(fax4FieldInfo))) {
-			TIFFErrorExt(tif->tif_clientdata, "TIFFInitCCITTFax4",
-			"Merging CCITT Fax 4 codec-specific tags failed");
-			return 0;
-		}
-
-		tif->tif_decoderow = Fax4Decode;
-		tif->tif_decodestrip = Fax4Decode;
-		tif->tif_decodetile = Fax4Decode;
-		tif->tif_encoderow = Fax4Encode;
-		tif->tif_encodestrip = Fax4Encode;
-		tif->tif_encodetile = Fax4Encode;
-		tif->tif_postencode = Fax4PostEncode;
-		/*
-		 * Suppress RTC at the end of each strip.
-		 */
-		return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_NORTC);
-	} else
-		return (0);
-}
-
-/*
- * CCITT Group 3 1-D Modified Huffman RLE Compression Support.
- * (Compression algorithms 2 and 32771)
- */
-
-/*
- * Decode the requested amount of RLE-encoded data.
- */
-static int
-Fax3DecodeRLE(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
-	DECLARE_STATE(tif, sp, "Fax3DecodeRLE");
-	int mode = sp->b.mode;
-
-	(void) s;
-	CACHE_STATE(tif, sp);
-	thisrun = sp->curruns;
-	while ((long)occ > 0) {
-		a0 = 0;
-		RunLength = 0;
-		pa = thisrun;
-#ifdef FAX3_DEBUG
-		printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail);
-		printf("-------------------- %d\n", tif->tif_row);
-		fflush(stdout);
-#endif
-		EXPAND1D(EOFRLE);
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		/*
-		 * Cleanup at the end of the row.
-		 */
-		if (mode & FAXMODE_BYTEALIGN) {
-			int n = BitsAvail - (BitsAvail &~ 7);
-			ClrBits(n);
-		} else if (mode & FAXMODE_WORDALIGN) {
-			int n = BitsAvail - (BitsAvail &~ 15);
-			ClrBits(n);
-			if (BitsAvail == 0 && !isAligned(cp, uint16))
-			    cp++;
-		}
-		buf += sp->b.rowbytes;
-		occ -= sp->b.rowbytes;
-		sp->line++;
-		continue;
-	EOFRLE:				/* premature EOF */
-		(*sp->fill)(buf, thisrun, pa, lastx);
-		UNCACHE_STATE(tif, sp);
-		return (-1);
-	}
-	UNCACHE_STATE(tif, sp);
-	return (1);
-}
-
-int
-TIFFInitCCITTRLE(TIFF* tif, int scheme)
-{
-	(void) scheme;
-	if (InitCCITTFax3(tif)) {		/* reuse G3 support */
-		tif->tif_decoderow = Fax3DecodeRLE;
-		tif->tif_decodestrip = Fax3DecodeRLE;
-		tif->tif_decodetile = Fax3DecodeRLE;
-		/*
-		 * Suppress RTC+EOLs when encoding and byte-align data.
-		 */
-		return TIFFSetField(tif, TIFFTAG_FAXMODE,
-		    FAXMODE_NORTC|FAXMODE_NOEOL|FAXMODE_BYTEALIGN);
-	} else
-		return (0);
-}
-
-int
-TIFFInitCCITTRLEW(TIFF* tif, int scheme)
-{
-	(void) scheme;
-	if (InitCCITTFax3(tif)) {		/* reuse G3 support */
-		tif->tif_decoderow = Fax3DecodeRLE;
-		tif->tif_decodestrip = Fax3DecodeRLE;
-		tif->tif_decodetile = Fax3DecodeRLE;
-		/*
-		 * Suppress RTC+EOLs when encoding and word-align data.
-		 */
-		return TIFFSetField(tif, TIFFTAG_FAXMODE,
-		    FAXMODE_NORTC|FAXMODE_NOEOL|FAXMODE_WORDALIGN);
-	} else
-		return (0);
-}
-#endif /* CCITT_SUPPORT */
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 8
- * fill-column: 78
- * End:
- */