summaryrefslogtreecommitdiffstats
path: root/tdespell2/plugins/ispell/makedent.cpp
blob: 5ed72215a48281110619e226099483bfd33c9826 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
/* enchant
 * Copyright (C) 2003 Dom Lachowicz
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * In addition, as a special exception, Dom Lachowicz
 * gives permission to link the code of this program with
 * non-LGPL Spelling Provider libraries (eg: a MSFT Office
 * spell checker backend) and distribute linked combinations including
 * the two.  You must obey the GNU Lesser General Public License in all
 * respects for all of the code used other than said providers.  If you modify
 * this file, you may extend this exception to your version of the
 * file, but you are not obligated to do so.  If you do not wish to
 * do so, delete this exception statement from your version.
 */

/*
 * Copyright 1988, 1989, 1992, 1993, Geoff Kuenning, Granada Hills, CA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All modifications to the source code must be clearly marked as
 *    such.  Binary redistributions based on modified source code
 *    must be clearly marked as modified versions in the documentation
 *    and/or other materials provided with the distribution.
 * 4. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgment:
 *      This product includes software developed by Geoff Kuenning and
 *      other unpaid contributors.
 * 5. The name of Geoff Kuenning may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY GEOFF KUENNING AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL GEOFF KUENNING OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * $Log$
 * Revision 1.2  2004/02/01 04:46:46  zrusin
 * Both ispell and aspell plugins are not working properly. We can start switching.
 *
 * Revision 1.1  2004/01/31 16:44:12  zrusin
 * ISpell plugin.
 *
 * Revision 1.4  2003/08/14 17:51:28  dom
 * update license - exception clause should be Lesser GPL
 *
 * Revision 1.3  2003/07/28 20:40:27  dom
 * fix up the license clause, further win32-registry proof some directory getting functions
 *
 * Revision 1.2  2003/07/16 22:52:49  dom
 * LGPL + exception license
 *
 * Revision 1.1  2003/07/15 01:15:08  dom
 * ispell enchant backend
 *
 * Revision 1.3  2003/02/12 02:10:38  hippietrail
 *
 * C casts -> C++ casts
 * Improved const-correctness due to changing casts
 * Fixed some warnings
 *
 * Revision 1.2  2003/01/29 05:50:12  hippietrail
 *
 * Fixed my mess in EncodingManager.
 * Changed many C casts to C++ casts.
 *
 * Revision 1.1  2003/01/24 05:52:35  hippietrail
 *
 * Refactored ispell code. Old ispell global variables had been put into
 * an allocated structure, a pointer to which was passed to many functions.
 * I have now made all such functions and variables private members of the
 * ISpellChecker class. It was C OO, now it's C++ OO.
 *
 * I've fixed the makefiles and tested compilation but am unable to test
 * operation. Please back out my changes if they cause problems which
 * are not obvious or easy to fix.
 *
 * Revision 1.8  2003/01/06 18:48:40  dom
 * ispell cleanup, start of using new 'add' save features
 *
 * Revision 1.7  2003/01/04 19:09:04  dom
 * some tidying... bug pissing me off...
 *
 * Revision 1.6  2002/09/19 05:31:18  hippietrail
 *
 * More Ispell cleanup.  Conditional globals and DEREF macros are removed.
 * K&R function declarations removed, converted to Doxygen style comments
 * where possible.  No code has been changed (I hope).  Compiles for me but
 * unable to test.
 *
 * Revision 1.5  2002/09/17 03:03:30  hippietrail
 *
 * After seeking permission on the developer list I've reformatted all the
 * spelling source which seemed to have parts which used 2, 3, 4, and 8
 * spaces for tabs.  It should all look good with our standard 4-space
 * tabs now.
 * I've concentrated just on indentation in the actual code.  More prettying
 * could be done.
 * * NO code changes were made *
 *
 * Revision 1.4  2002/09/13 17:20:13  mpritchett
 * Fix more warnings for Linux build
 *
 * Revision 1.3  2002/03/22 14:31:57  dom
 * fix mg's compile problem
 *
 * Revision 1.2  2001/05/12 16:05:42  thomasf
 * Big pseudo changes to ispell to make it pass around a structure rather
 * than rely on all sorts of gloabals willy nilly here and there.  Also
 * fixed our spelling class to work with accepting suggestions once more.
 * This code is dirty, gross and ugly (not to mention still not supporting
 * multiple hash sized just yet) but it works on my machine and will no
 * doubt break other machines.
 *
 * Revision 1.1  2001/04/15 16:01:24  tomas_f
 * moving to spell/xp
 *
 * Revision 1.6  1999/12/21 18:46:29  sterwill
 * ispell patch for non-English dictionaries by Henrik Berg <henrik@lansen.se>
 *
 * Revision 1.5  1999/10/20 03:19:35  paul
 * Hacked ispell code to ignore any characters that don't fit in the lookup tables loaded from the dictionary.  It ain't pretty, but at least we don't crash there any more.
 *
 * Revision 1.4  1999/04/13 17:12:51  jeff
 * Applied "Darren O. Benham" <gecko@benham.net> spell check changes.
 * Fixed crash on Win32 with the new code.
 *
 * Revision 1.3  1998/12/29 14:55:33  eric
 *
 * I've doctored the ispell code pretty extensively here.  It is now
 * warning-free on Win32.  It also *works* on Win32 now, since I
 * replaced all the I/O calls with ANSI standard ones.
 *
 * Revision 1.3  1998/12/29 14:55:33  eric
 *
 * I've doctored the ispell code pretty extensively here.  It is now
 * warning-free on Win32.  It also *works* on Win32 now, since I
 * replaced all the I/O calls with ANSI standard ones.
 *
 * Revision 1.2  1998/12/28 23:11:30  eric
 *
 * modified spell code and integration to build on Windows.
 * This is still a hack.
 *
 * Actually, it doesn't yet WORK on Windows.  It just builds.
 * SpellCheckInit is failing for some reason.
 *
 * Revision 1.1  1998/12/28 18:04:43  davet
 * Spell checker code stripped from ispell.  At this point, there are
 * two external routines...  the Init routine, and a check-a-word routine
 * which returns a boolean value, and takes a 16 bit char string.
 * The code resembles the ispell code as much as possible still.
 *
 * Revision 1.45  1994/12/27  23:08:52  geoff
 * Add code to makedent to reject words that contain non-word characters.
 * This helps protect people who use ISO 8-bit characters when ispell
 * isn't configured for that option.
 *
 * Revision 1.44  1994/10/25  05:46:20  geoff
 * Fix some incorrect declarations in the lint versions of some routines.
 *
 * Revision 1.43  1994/09/16  03:32:34  geoff
 * Issue an error message for bad affix flags
 *
 * Revision 1.42  1994/02/07  04:23:43  geoff
 * Correctly identify the deformatter when changing file types
 *
 * Revision 1.41  1994/01/25  07:11:55  geoff
 * Get rid of all old RCS log lines in preparation for the 3.1 release.
 *
 */

#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "ispell_checker.h"
#include "msgs.h"

int		makedent P ((char * lbuf, int lbuflen, struct dent * ent));
/*int		combinecaps P ((struct dent * hdr, struct dent * newent));
#ifndef NO_CAPITALIZATION_SUPPORT
static void	forcevheader P ((struct dent * hdrp, struct dent * oldp,
		  struct dent * newp));
#endif / * NO_CAPITALIZATION_SUPPORT * /
static int	combine_two_entries P ((struct dent * hdrp,
		  struct dent * oldp, struct dent * newp));
static int	acoversb P ((struct dent * enta, struct dent * entb));
*/
/*static int	issubset P ((struct dent * ent1, struct dent * ent2));
static void	combineaffixes P ((struct dent * ent1, struct dent * ent2));*/

void		toutent P ((FILE * outfile, struct dent * hent,
		  int onlykeep));
/*static void	toutword P ((FILE * outfile, char * word,
		  struct dent * cent));
static void	flagout P ((FILE * outfile, int flag));
*/
#ifndef ICHAR_IS_CHAR
ichar_t *	icharcpy P ((ichar_t * out, ichar_t * in));
int		icharlen P ((ichar_t * str));
int		icharcmp P ((ichar_t * s1, ichar_t * s2));
int		icharncmp P ((ichar_t * s1, ichar_t * s2, int n));
#endif

/*static int  	has_marker;*/

/*
 * Fill in a directory entry, including setting the capitalization flags, and
 * allocate and initialize memory for the d->word field.  Returns -1
 * if there was trouble.  The input word must be in canonical form.
int makedent (lbuf, lbuflen, d)
This function is not used by AbiWord.  I don't know if it'll be needed for 
other abi documents
 */
	
#ifndef NO_CAPITALIZATION_SUPPORT
/*!
** Classify the capitalization of a sample entry.  Returns one of the
** four capitalization codes ANYCASE, ALLCAPS, CAPITALIZED, or FOLLOWCASE.
**
** \param word
**
** \return
*/
long
ISpellChecker::whatcap (ichar_t *word)
{
    ichar_t *	p;

    for (p = word;  *p;  p++)
	{
		if (mylower (*p))
			break;
	}
    if (*p == '\0')
		return ALLCAPS;
    else
	{
		for (  ;  *p;  p++)
	    {
			if (myupper (*p))
				break;
	    }
		if (*p == '\0')
	    {
			/*
			** No uppercase letters follow the lowercase ones.
			** If there is more than one uppercase letter, it's
			** "followcase". If only the first one is capitalized,
			** it's "capitalize".  If there are no capitals
			** at all, it's ANYCASE.
			*/
			if (myupper (word[0]))
			{
				for (p = word + 1;  *p != '\0';  p++)
				{
					if (myupper (*p))
						return FOLLOWCASE;
				}
				return CAPITALIZED;
			}
			else
				return ANYCASE;
	    }
		else
			return FOLLOWCASE;	/* .../lower/upper */
	}
}

/*!
** Add a variant-capitalization header to a word.  This routine may be
** called even for a followcase word that doesn't yet have a header.
**
** \param dp Entry to update
**
** \return 0 if all was ok, -1 if allocation error.
*/
int ISpellChecker::addvheader ( struct dent *dp)
{
    struct dent *	tdent; /* Copy of entry */

    /*
    ** Add a second entry with the correct capitalization, and then make
    ** dp into a special dummy entry.
    */
    tdent = static_cast<struct dent *>(malloc(sizeof (struct dent)));
    if (tdent == NULL)
	{
		fprintf (stderr, MAKEDENT_C_NO_WORD_SPACE, dp->word);
		return -1;
	}
    *tdent = *dp;
    if (captype (tdent->flagfield) != FOLLOWCASE)
		tdent->word = NULL;
    else
	{
		/* Followcase words need a copy of the capitalization */
		tdent->word = static_cast<char *>(malloc (static_cast<unsigned int>(strlen(tdent->word)) + 1));
		if (tdent->word == NULL)
	    {
			fprintf (stderr, MAKEDENT_C_NO_WORD_SPACE, dp->word);
			free (reinterpret_cast<char *>(tdent));
			return -1;
	    }
		strcpy (tdent->word, dp->word);
	}
    chupcase (dp->word);
    dp->next = tdent;
    dp->flagfield &= ~CAPTYPEMASK;
    dp->flagfield |= (ALLCAPS | MOREVARIANTS);
    return 0;
}
#endif

/*
** Combine and resolve the entries describing two capitalizations of the same
** word.  This may require allocating yet more entries.
**
** Hdrp is a pointer into a hash table.  If the word covered by hdrp has
** variations, hdrp must point to the header.  Newp is a pointer to temporary
** storage, and space is malloc'ed if newp is to be kept.  The newp->word
** field must have been allocated with mymalloc, so that this routine may free
** the space if it keeps newp but not the word.
**
** Return value:  0 if the word was added, 1 if the word was combined
** with an existing entry, and -1 if trouble occurred (e.g., malloc).
** If 1 is returned, newp->word may have been be freed using myfree.
**
** Life is made much more difficult by the KEEP flag's possibilities.  We
** must ensure that a !KEEP word doesn't find its way into the personal
** dictionary as a result of this routine's actions.  However, a !KEEP
** word that has affixes must have come from the main dictionary, so it
** is acceptable to combine entries in that case (got that?).
**
** The net result of all this is a set of rules that is a bloody pain
** to figure out.  Basically, we want to choose one of the following actions:
**
**	(1) Add newp's affixes and KEEP flag to oldp, and discard newp.
**	(2) Add oldp's affixes and KEEP flag to newp, replace oldp with
**	    newp, and discard newp.
#ifndef NO_CAPITALIZATION_SUPPORT
**	(3) Insert newp as a new entry in the variants list.  If there is
**	    currently no variant header, this requires adding one.  Adding a
**	    header splits into two sub-cases:
**
**	    (3a) If oldp is ALLCAPS and the KEEP flags match, just turn it
**		into the header.
**	    (3b) Otherwise, add a new entry to serve as the header.
**		To ease list linking, this is done by copying oldp into
**		the new entry, and then performing (3a).
**
**	    After newp has been added as a variant, its affixes and KEEP
**	    flag are OR-ed into the variant header.
#endif
**
** So how to choose which?  The default is always case (3), which adds newp
** as a new entry in the variants list.  Cases (1) and (2) are symmetrical
** except for which entry is discarded.  We can use case (1) or (2) whenever
** one entry "covers" the other.  "Covering" is defined as follows:
**
**	(4) For entries with matching capitalization types, A covers B
**	    if:
**
**	    (4a) B's affix flags are a subset of A's, or the KEEP flags
**		 match, and
**	    (4b) either the KEEP flags match, or A's KEEP flag is set.
**		(Since A has more suffixes, combining B with it won't
**		cause any extra suffixes to be added to the dictionary.)
**	    (4c) If the words are FOLLOWCASE, the capitalizations match
**		exactly.
**
#ifndef NO_CAPITALIZATION_SUPPORT
**	(5) For entries with mismatched capitalization types, A covers B
**	    if (4a) and (4b) are true, and:
**
**	    (5a) B is ALLCAPS, or
**	    (5b) A is ANYCASE, and B is CAPITALIZED.
#endif
**
** For any "hdrp" without variants, oldp is the same as hdrp.  Otherwise,
** the above tests are applied using each variant in turn for oldp.
int combinecaps (hdrp, newp)
static void forcevheader (hdrp, oldp, newp)
static int combine_two_entries (hdrp, oldp, newp)
static int acoversb (enta, entb)
*/

/*
 * \param s
 */
void
ISpellChecker::upcase (ichar_t *s)
{

    while (*s)
	{
		*s = mytoupper (*s);
		s++;
	}
}

/*
 * \param s
 */
void
ISpellChecker::lowcase (ichar_t *s)
{

    while (*s)
	{
		*s = mytolower (*s);
		s++;
	}
}

/*!
 * Upcase variant that works on normal strings.  Note that it is a lot
 * slower than the normal upcase.  The input must be in canonical form.
 * 
 * \param s
 */
void
ISpellChecker::chupcase (char *s)
{
    ichar_t *	is;

    is = strtosichar (s, 1);
    upcase (is);
    ichartostr (s, is, strlen (s) + 1, 1);
}

/*
** See if one affix field is a subset of another.  Returns NZ if ent1
** is a subset of ent2.  The KEEP flag is not taken into consideration.
static int issubset (ent1, ent2)
static void combineaffixes (ent1, ent2)
*/

/*
** Write out a dictionary entry, including capitalization variants.
** If onlykeep is true, only those variants with KEEP set will be
** written.
Removed -- not used by Abiword
void toutent_ (toutfile, hent, onlykeep)
static void toutword (toutfile, word, cent)
static void flagout (toutfile, flag)
*/

/*!
 * If the string under the given pointer begins with a string character,
 * return the length of that "character".  If not, return 0.
 * May be called any time, but it's best if "isstrstart" is first
 * used to filter out unnecessary calls.
 *
 * As a side effect, "laststringch" is set to the number of the string
 * found, or to -1 if none was found.  This can be useful for such things
 * as case conversion.
 *
 * \param bufp
 * \param canonical NZ if input is in canonical form
 *
 * \return
 */
int
ISpellChecker::stringcharlen (char *bufp, int canonical)
{
#ifdef SLOWMULTIPLY
    static char *	sp[MAXSTRINGCHARS];
    static int		inited = 0;
#endif
    char *	bufcur;
    char *	stringcur;
    int	stringno;
    int	lowstringno;
    int	highstringno;
    int			dupwanted;

#ifdef SLOWMULTIPLY
    if (!inited)
	{
		inited = 1;
		for (stringno = 0;  stringno < MAXSTRINGCHARS;  stringno++)
			sp[stringno] = &hashheader.stringchars[stringno][0];
	}
#endif
    lowstringno = 0;
    highstringno = m_hashheader.nstrchars - 1;
    dupwanted = canonical ? 0 : m_defdupchar;
    while (lowstringno <= highstringno)
	{
		stringno = (lowstringno + highstringno) >> 1;
#ifdef SLOWMULTIPLY
		stringcur = sp[stringno];
#else
		stringcur = &m_hashheader.stringchars[stringno][0];
#endif
		bufcur = bufp;
		while (*stringcur)
	    {
#ifdef NO8BIT
			if (((*bufcur++ ^ *stringcur) & 0x7F) != 0)
#else
			if (*bufcur++ != *stringcur)
#endif
				break;
			/*
			** We can't use autoincrement above because of the
			** test below.
			*/
			stringcur++;
	    }
		if (*stringcur == '\0')
	    {
			if (m_hashheader.dupnos[stringno] == dupwanted)
			{
				/* We have a match */
				m_laststringch = m_hashheader.stringdups[stringno];
#ifdef SLOWMULTIPLY
				return stringcur - sp[stringno];
#else
				return stringcur - &m_hashheader.stringchars[stringno][0];
#endif
			}
			else
				--stringcur;
	    }
		/* No match - choose which side to search on */
#ifdef NO8BIT
		if ((*--bufcur & 0x7F) < (*stringcur & 0x7F))
			highstringno = stringno - 1;
		else if ((*bufcur & 0x7F) > (*stringcur & 0x7F))
			lowstringno = stringno + 1;
#else
		if (*--bufcur < *stringcur)
			highstringno = stringno - 1;
		else if (*bufcur > *stringcur)
			lowstringno = stringno + 1;
#endif
		else if (dupwanted < m_hashheader.dupnos[stringno])
			highstringno = stringno - 1;
		else
			lowstringno = stringno + 1;
	}
    m_laststringch = static_cast<unsigned int>(-1);
    return 0;			/* Not a string character */
}

/* MACROS CONVERTED TO FUNCTIONS
** These macros are similar to the ones above, but they take into account
** the possibility of string characters.  Note well that they take a POINTER,
** not a character.
**
** The "l_" versions set "len" to the length of the string character as a
** handy side effect.  (Note that the global "laststringch" is also set,
** and sometimes used, by these macros.)
**
** The "l1_" versions go one step further and guarantee that the "len"
** field is valid for *all* characters, being set to 1 even if the macro
** returns false.  This macro is a great example of how NOT to write
** readable C.
*/
#define isstringch(ptr, canon)	(isstringstart (*(ptr)) \
				  &&  stringcharlen ((ptr), (canon)) > 0)
/*
int isstringch(char *ptr, int canon) {
	return (isstringstart (*(ptr)) && (len = stringcharlen ((ptr), (canon))) > 0);
}
*/

#define l_isstringch(ptr, len, canon)	\
				(isstringstart (*(ptr)) \
				  &&  (len = stringcharlen ((ptr), (canon))) \
				    > 0)
/*
int l_isstringch(char *ptr, int len, int canon) {
	return (isstringstart (*(ptr)) &&  (len = stringcharlen ((ptr), (canon))) > 0);
}
*/

#define l1_isstringch(ptr, len, canon)	\
				(len = 1, \
				  isstringstart ((unsigned char)(*(ptr))) \
				    &&  ((len = \
					  stringcharlen ((ptr), (canon))) \
					> 0 \
				      ? 1 : (len = 1, 0)))
/*
int l1_isstringch(char *ptr, int len, int canon) {
	return (len = 1, isstringstart ((unsigned char)(*(ptr))) &&  
           ((len = stringcharlen ((ptr), (canon))) > 0 ? 1 : (len = 1, 0)));
}
*/

/*** END MACRO CONVERSION ***/

/*!
 * Convert an external string to an ichar_t string.  If necessary, the parity
 * bit is stripped off as part of the process.
 *
 * \param out Where to put result
 * \param in String to convert
 * \param outlen Size of output buffer, *BYTES*
 * \param canonical NZ if input is in canonical form
 *
 * \return NZ if the output string overflowed.
 */
int
ISpellChecker::strtoichar (ichar_t *out, char *in, int outlen, int canonical)
{
	int len = 1;		/* Length of next character */

	outlen /= sizeof (ichar_t);		/* Convert to an ichar_t count */
	for (  ;  --outlen > 0  &&  *in != '\0';  in += len)
	{
		if (l1_isstringch (in, len , canonical)) {
			*out++ = SET_SIZE + m_laststringch;
		} else {
			*out++ = (unsigned char)( *in );
		}
	}
	*out = 0;
	return outlen <= 0;
}

/*!
 * Convert an ichar_t string to an external string.
 *
 * WARNING: the resulting string may wind up being longer than the
 * original.  In fact, even the sequence strtoichar->ichartostr may
 * produce a result longer than the original, because the output form
 * may use a different string type set than the original input form.
 *
 * \param out Where to put result
 * \param in String to convert
 * \param outlen Size of output buffer, bytes
 * \param canonical NZ for canonical form
 *
 * \return NZ if the output string overflowed.
 */
int
ISpellChecker::ichartostr ( char *out, ichar_t *in, int outlen, int canonical)
{
    int	ch;		/* Next character to store */
    int	i;		/* Index into duplicates list */
    char *	scharp;		/* Pointer into a string char */

    while (--outlen > 0  &&  (ch = *in++) != 0)
	{
		if (ch < SET_SIZE)
			*out++ = static_cast<char>(ch);
		else
		{
			ch -= SET_SIZE;
			if (!canonical)
			{
				for (i = m_hashheader.nstrchars;  --i >= 0;  )
				{
					if (m_hashheader.dupnos[i] == m_defdupchar
					  &&  (static_cast<int>(m_hashheader.stringdups[i])) == ch)
					{
						ch = i;
						break;
					}
				}
			}
			scharp = m_hashheader.stringchars[static_cast<unsigned>(ch)];
			while ((*out++ = *scharp++) != '\0')
				;
			out--;
	    }
	}
    *out = '\0';
    return outlen <= 0;
}

/*!
 * Convert a string to an ichar_t, storing the result in a static area.
 *
 * \param in String to convert
 * \param canonical NZ if input is in canonical form
 *
 * \return
 */
ichar_t *
ISpellChecker::strtosichar ( char *in, int canonical)
{
    static ichar_t	out[STRTOSICHAR_SIZE / sizeof (ichar_t)];

    if (strtoichar (out, in, sizeof out, canonical))
		fprintf (stderr, WORD_TOO_LONG (in));
    return out;
}

/*!
 * Convert an ichar_t to a string, storing the result in a static area.
 *
 * \param in Internal string to convert
 * \param canonical NZ for canonical conversion
 *
 * \return
 */
char *
ISpellChecker::ichartosstr (ichar_t *in, int canonical)
{
    static char		out[ICHARTOSSTR_SIZE];

    if (ichartostr (out, in, sizeof out, canonical))
		fprintf (stderr, WORD_TOO_LONG (out));
    return out;
}

/*!
 * Convert a single ichar to a printable string, storing the result in
 * a static area.
 *
 * \param in
 *
 * \return
 */
char *
ISpellChecker::printichar (int in)
{
    static char		out[MAXSTRINGCHARLEN + 1];

    if (in < SET_SIZE)
	{
		out[0] = static_cast<char>(in);
		out[1] = '\0';
	}
    else
		strcpy (out, m_hashheader.stringchars[static_cast<unsigned>(in) - SET_SIZE]);
    return out;
}

#ifndef ICHAR_IS_CHAR
/*!
 * Copy an ichar_t.
 *
 * \param out Destination
 * \param in Source
 *
 * \return
 */
ichar_t *
icharcpy (ichar_t *out, ichar_t *in)
{
    ichar_t *		origout;	/* Copy of destination for return */

    origout = out;
    while ((*out++ = *in++) != 0)
		;
    return origout;
}

/*!
 * Return the length of an ichar_t.
 *
 * \param in String to count
 *
 * \return
 */
int
icharlen (ichar_t * in)
{
    int	len;		/* Length so far */

    for (len = 0;  *in++ != 0;  len++)
		;
    return len;
}

/*!
 * Compare two ichar_t's.
 *
 * \param s1
 * \param s2
 *
 * \return
 */
int
icharcmp (ichar_t * s1, ichar_t * s2)
{

    while (*s1 != 0)
	{
		if (*s1++ != *s2++)
			return *--s1 - *--s2;
	}
    return *s1 - *s2;
}

/*!
 * Strncmp for two ichar_t's.
 *
 * \param s1
 * \param s2
 * \param n
 *
 * \return
 */
int
icharncmp (ichar_t *s1, ichar_t *s2, int n)
{

    while (--n >= 0  &&  *s1 != 0)
	{
		if (*s1++ != *s2++)
			return *--s1 - *--s2;
	}
    if (n < 0)
		return 0;
    else
		return *s1 - *s2;
}

#endif

/*
 * \param istate
 * \param name
 * \param searchnames
 * \param deformatter
 *
 * \return
 */
int
ISpellChecker::findfiletype (const char *name, int searchnames, int *deformatter)
{
    char *		cp;		/* Pointer into suffix list */
    int			cplen;		/* Length of current suffix */
    int	i;		/* Index into type table */
    int			len;		/* Length of the name */

    /*
     * Note:  for now, the deformatter is set to 1 for tex, 0 for nroff.
     * Further, we assume that it's one or the other, so that a test
     * for tex is sufficient.  This needs to be generalized.
     */
    len = strlen (name);
    if (searchnames)
	{
		for (i = 0;  i < m_hashheader.nstrchartype;  i++)
	    {
			if (strcmp (name, m_chartypes[i].name) == 0)
			{
				if (deformatter != NULL)
					*deformatter =
					  (strcmp (m_chartypes[i].deformatter, "tex") == 0);
				return i;
			}
	    }
	}
    for (i = 0;  i < m_hashheader.nstrchartype;  i++)
	{
		for (cp = m_chartypes[i].suffixes;  *cp != '\0';  cp += cplen + 1)
		{
			cplen = strlen (cp);
			if (len >= cplen  &&  strcmp (&name[len - cplen], cp) == 0)
			{
				if (deformatter != NULL)
					*deformatter =
					  (strcmp (m_chartypes[i].deformatter, "tex") == 0);
				return i;
			}
	    }
	}
    return -1;
}

/*
	HACK: macros replaced with function implementations 
	so we could do a side-effect-free check for unicode
	characters which aren't in hashheader

	TODO: this is just a workaround to keep us from crashing. 
	more sophisticated logic needed here. 
*/
char ISpellChecker::myupper(ichar_t c)
{
	if (c < (SET_SIZE + MAXSTRINGCHARS))
		return m_hashheader.upperchars[c];
	else
		return 0;
}

char ISpellChecker::mylower(ichar_t c)
{
	if (c < (SET_SIZE + MAXSTRINGCHARS))
		return m_hashheader.lowerchars[c];
	else
		return 0;
}

int myspace(ichar_t c)
{
	return ((c > 0)  &&  (c < 0x80) &&  isspace(static_cast<unsigned char>(c)));
}

char ISpellChecker::iswordch(ichar_t c)
{
	if (c < (SET_SIZE + MAXSTRINGCHARS))
		return m_hashheader.wordchars[c];
	else
		return 0;
}

char ISpellChecker::isboundarych(ichar_t c)
{
	if (c < (SET_SIZE + MAXSTRINGCHARS))
		return m_hashheader.boundarychars[c];
	else
		return 0;
}

char ISpellChecker::isstringstart(ichar_t c)
{
	if (c < (SET_SIZE))
		return m_hashheader.stringstarts[static_cast<unsigned char>(c)];
	else
		return 0;
}

ichar_t ISpellChecker::mytolower(ichar_t c)
{
	if (c < (SET_SIZE + MAXSTRINGCHARS))
		return m_hashheader.lowerconv[c];
	else
		return c;
}

ichar_t ISpellChecker::mytoupper (ichar_t c)
{
	if (c < (SET_SIZE + MAXSTRINGCHARS))
		return m_hashheader.upperconv[c];
	else
		return c;
}