summaryrefslogtreecommitdiffstats
path: root/tdespell2/plugins/ispell/correct.cpp
blob: 65e98fa6d5f8638746023655b5d169d1e2cd2d2e (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
/* vim: set sw=8: -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* 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.
 */

/*
 * correct.c - Routines to manage the higher-level aspects of spell-checking
 *
 * This code originally resided in ispell.c, but was moved here to keep
 * file sizes smaller.
 *
 * Copyright (c), 1983, by Pace Willisson
 *
 * Copyright 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 1.1  2004/01/31 16:44:12  zrusin
 * ISpell plugin.
 *
 * Revision 1.4  2003/08/14 17:51:26  dom
 * update license - exception clause should be Lesser GPL
 *
 * Revision 1.3  2003/07/28 20:40:25  dom
 * fix up the license clause, further win32-registry proof some directory getting functions
 *
 * Revision 1.2  2003/07/16 22:52:35  dom
 * LGPL + exception license
 *
 * Revision 1.1  2003/07/15 01:15:04  dom
 * ispell enchant backend
 *
 * Revision 1.2  2003/01/29 05:50:11  hippietrail
 *
 * Fixed my mess in EncodingManager.
 * Changed many C casts to C++ casts.
 *
 * Revision 1.1  2003/01/24 05:52:31  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 1.7  2002/09/19 05:31:15  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 1.6  2002/09/17 03:03:28  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 1.5  2002/09/13 17:20:12  mpritchett
 * Fix more warnings for Linux build
 *
 * Revision 1.4  2002/03/06 08:27:16  fjfranklin
 * o Only activate compound handling when the hash file says so (Per Larsson)
 *
 * Revision 1.3  2001/05/14 09:52:50  hub
 * Removed newMain.c from GNUmakefile.am
 *
 * C++ comments are not C comment. Changed to C comments
 *
 * 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 1.2  1999/10/05 16:17:28  paul
 * Fixed build, and other tidyness.
 * Spell dialog enabled by default, with keyboard binding of F7.
 *
 * Revision 1.1  1999/09/29 23:33:32  justin
 * Updates to the underlying ispell-based code to support suggested corrections.
 *
 * Revision 1.59  1995/08/05  23:19:43  geoff
 * Fix a bug that caused offsets for long lines to be confused if the
 * line started with a quoting uparrow.
 *
 * Revision 1.58  1994/11/02  06:56:00  geoff
 * Remove the anyword feature, which I've decided is a bad idea.
 *
 * Revision 1.57  1994/10/26  05:12:39  geoff
 * Try boundary characters when inserting or substituting letters, except
 * (naturally) at word boundaries.
 *
 * Revision 1.56  1994/10/25  05:46:30  geoff
 * Fix an assignment inside a conditional that could generate spurious
 * warnings (as well as being bad style).  Add support for the FF_ANYWORD
 * option.
 *
 * Revision 1.55  1994/09/16  04:48:24  geoff
 * Don't pass newlines from the input to various other routines, and
 * don't assume that those routines leave the input unchanged.
 *
 * Revision 1.54  1994/09/01  06:06:41  geoff
 * Change erasechar/killchar to uerasechar/ukillchar to avoid
 * shared-library problems on HP systems.
 *
 * Revision 1.53  1994/08/31  05:58:38  geoff
 * Add code to handle extremely long lines in -a mode without splitting
 * words or reporting incorrect offsets.
 *
 * Revision 1.52  1994/05/25  04:29:24  geoff
 * Fix a bug that caused line widths to be calculated incorrectly when
 * displaying lines containing tabs.  Fix a couple of places where
 * characters were sign-extended incorrectly, which could cause 8-bit
 * characters to be displayed wrong.
 *
 * Revision 1.51  1994/05/17  06:44:05  geoff
 * Add support for controlled compound formation and the COMPOUNDONLY
 * option to affix flags.
 *
 * Revision 1.50  1994/04/27  05:20:14  geoff
 * Allow compound words to be formed from more than two components
 *
 * Revision 1.49  1994/04/27  01:50:31  geoff
 * Add support to correctly capitalize words generated as a result of a
 * missing-space suggestion.
 *
 * Revision 1.48  1994/04/03  23:23:02  geoff
 * Clean up the code in missingspace() to be a bit simpler and more
 * efficient.
 *
 * Revision 1.47  1994/03/15  06:24:23  geoff
 * Fix the +/-/~ commands to be independent.  Allow the + command to
 * receive a suffix which is a deformatter type (currently hardwired to
 * be either tex or nroff/troff).
 *
 * Revision 1.46  1994/02/21  00:20:03  geoff
 * Fix some bugs that could cause bad displays in the interaction between
 * TeX parsing and string characters.  Show_char now will not overrun
 * the inverse-video display area by accident.
 *
 * Revision 1.45  1994/02/14  00:34:51  geoff
 * Fix correct to accept length parameters for ctok and itok, so that it
 * can pass them to the to/from ichar routines.
 *
 * Revision 1.44  1994/01/25  07:11:22  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"

/*
extern void upcase P ((ichar_t * string));
extern void lowcase P ((ichar_t * string));
extern ichar_t * strtosichar P ((char * in, int canonical));

int compoundflag = COMPOUND_CONTROLLED;
*/

/*
 * \param a
 * \param b
 * \param canonical NZ for canonical string chars
 *
 * \return
 */
int
ISpellChecker::casecmp (char *a, char *b, int canonical)
{
    register ichar_t *	ap;
    register ichar_t *	bp;
    ichar_t		inta[INPUTWORDLEN + 4 * MAXAFFIXLEN + 4];
    ichar_t		intb[INPUTWORDLEN + 4 * MAXAFFIXLEN + 4];

    strtoichar (inta, a, sizeof inta, canonical);
    strtoichar (intb, b, sizeof intb, canonical);
    for (ap = inta, bp = intb;  *ap != 0;  ap++, bp++)
	{
		if (*ap != *bp)
	    {
			if (*bp == '\0')
				return m_hashheader.sortorder[*ap];
			else if (mylower (*ap))
			{
				if (mylower (*bp)  ||  mytoupper (*ap) != *bp)
					return static_cast<int>(m_hashheader.sortorder[*ap])
					  - static_cast<int>(m_hashheader.sortorder[*bp]);
			}
			else
			{
				if (myupper (*bp)  ||  mytolower (*ap) != *bp)
					return static_cast<int>(m_hashheader.sortorder[*ap])
					  - static_cast<int>(m_hashheader.sortorder[*bp]);
			}
	    }
	}
    if (*bp != '\0')
		return -static_cast<int>(m_hashheader.sortorder[*bp]);
    for (ap = inta, bp = intb;  *ap;  ap++, bp++)
	{
		if (*ap != *bp)
	    {
			return static_cast<int>(m_hashheader.sortorder[*ap])
			  - static_cast<int>(m_hashheader.sortorder[*bp]);
	    }
	}
    return 0;
}

/*
 * \param word
 */
void
ISpellChecker::makepossibilities (ichar_t *word)
{
    register int	i;

    for (i = 0; i < MAXPOSSIBLE; i++)
	m_possibilities[i][0] = 0;
    m_pcount = 0;
    m_maxposslen = 0;
    m_easypossibilities = 0;

#ifndef NO_CAPITALIZATION_SUPPORT
    wrongcapital (word);
#endif

/* 
 * according to Pollock and Zamora, CACM April 1984 (V. 27, No. 4),
 * page 363, the correct order for this is:
 * OMISSION = TRANSPOSITION > INSERTION > SUBSTITUTION
 * thus, it was exactly backwards in the old version. -- PWP
 */

    if (m_pcount < MAXPOSSIBLE)
		missingletter (word);		/* omission */
    if (m_pcount < MAXPOSSIBLE)
		transposedletter (word);	/* transposition */
    if (m_pcount < MAXPOSSIBLE)
		extraletter (word);		/* insertion */
    if (m_pcount < MAXPOSSIBLE)
		wrongletter (word);		/* substitution */

    if ((m_hashheader.compoundflag != COMPOUND_ANYTIME)  &&
		  m_pcount < MAXPOSSIBLE)
		missingspace (word);	/* two words */

}

/*
 * \param word
 *
 * \return
 */
int
ISpellChecker::insert (ichar_t *word)
{
    register int	i;
    register char *	realword;

    realword = ichartosstr (word, 0);
    for (i = 0; i < m_pcount; i++)
	{
		if (strcmp (m_possibilities[i], realword) == 0)
			return (0);
	}

    strcpy (m_possibilities[m_pcount++], realword);
    i = strlen (realword);
    if (i > m_maxposslen)
		m_maxposslen = i;
    if (m_pcount >= MAXPOSSIBLE)
		return (-1);
    else
		return (0);
}

#ifndef NO_CAPITALIZATION_SUPPORT
/*
 * \param word
 */
void
ISpellChecker::wrongcapital (ichar_t *word)
{
    ichar_t		newword[INPUTWORDLEN + MAXAFFIXLEN];

    /*
    ** When the third parameter to "good" is nonzero, it ignores
    ** case.  If the word matches this way, "ins_cap" will recapitalize
    ** it correctly.
    */
    if (good (word, 0, 1, 0, 0))
	{
		icharcpy (newword, word);
		upcase (newword);
		ins_cap (newword, word);
	}
}
#endif

/*
 * \param word
 */
void
ISpellChecker::wrongletter (ichar_t *word)
{
    register int	i;
    register int	j;
    register int	n;
    ichar_t		savechar;
    ichar_t		newword[INPUTWORDLEN + MAXAFFIXLEN];

    n = icharlen (word);
    icharcpy (newword, word);
#ifndef NO_CAPITALIZATION_SUPPORT
    upcase (newword);
#endif

    for (i = 0; i < n; i++)
	{
		savechar = newword[i];
		for (j=0; j < m_Trynum; ++j)
		{
			if (m_Try[j] == savechar)
				continue;
			else if (isboundarych (m_Try[j])  &&  (i == 0  ||  i == n - 1))
				continue;
			newword[i] = m_Try[j];
			if (good (newword, 0, 1, 0, 0))
			{
				if (ins_cap (newword, word) < 0)
					return;
			}
		}
		newword[i] = savechar;
	}
}

/*
 * \param word
 */
void
ISpellChecker::extraletter (ichar_t *word)
{
    ichar_t		newword[INPUTWORDLEN + MAXAFFIXLEN];
    register ichar_t *	p;
    register ichar_t *	r;

    if (icharlen (word) < 2)
		return;

    icharcpy (newword, word + 1);
    for (p = word, r = newword;  *p != 0;  )
	{
		if (good (newword, 0, 1, 0, 0))
		{
			if (ins_cap (newword, word) < 0)
				return;
		}
		*r++ = *p++;
	}
}

/*
 * \param word
 */
void
ISpellChecker::missingletter (ichar_t *word)
{
    ichar_t		newword[INPUTWORDLEN + MAXAFFIXLEN + 1];
    register ichar_t *	p;
    register ichar_t *	r;
    register int	i;

    icharcpy (newword + 1, word);
    for (p = word, r = newword;  *p != 0;  )
	{
		for (i = 0;  i < m_Trynum;  i++)
	    {
			if (isboundarych (m_Try[i])  &&  r == newword)
				continue;
			*r = m_Try[i];
			if (good (newword, 0, 1, 0, 0))
			{
				if (ins_cap (newword, word) < 0)
					return;
			}
	    }
		*r++ = *p++;
	}
    for (i = 0;  i < m_Trynum;  i++)
	{
		if (isboundarych (m_Try[i]))
			continue;
		*r = m_Try[i];
		if (good (newword, 0, 1, 0, 0))
		{
			if (ins_cap (newword, word) < 0)
				return;
		}
	}
}

/*
 * \param word
 */
void ISpellChecker::missingspace (ichar_t *word)
{
    ichar_t		firsthalf[MAX_CAPS][INPUTWORDLEN + MAXAFFIXLEN];
    int			firstno;	/* Index into first */
    ichar_t *		firstp;		/* Ptr into current firsthalf word */
    ichar_t		newword[INPUTWORDLEN + MAXAFFIXLEN + 1];
    int			nfirsthalf;	/* No. words saved in 1st half */
    int			nsecondhalf;	/* No. words saved in 2nd half */
    register ichar_t *	p;
    ichar_t		secondhalf[MAX_CAPS][INPUTWORDLEN + MAXAFFIXLEN];
    int			secondno;	/* Index into second */

    /*
    ** We don't do words of length less than 3;  this keeps us from
    ** splitting all two-letter words into two single letters.  We
    ** also don't do maximum-length words, since adding the space
    ** would exceed the size of the "possibilities" array.
    */
    nfirsthalf = icharlen (word);
    if (nfirsthalf < 3  ||  nfirsthalf >= INPUTWORDLEN + MAXAFFIXLEN - 1)
		return;
    icharcpy (newword + 1, word);
    for (p = newword + 1;  p[1] != '\0';  p++)
	{
		p[-1] = *p;
		*p = '\0';
		if (good (newword, 0, 1, 0, 0))
		{
			/*
			 * Save_cap must be called before good() is called on the
			 * second half, because it uses state left around by
			 * good().  This is unfortunate because it wastes a bit of
			 * time, but I don't think it's a significant performance
			 * problem.
			 */
			nfirsthalf = save_cap (newword, word, firsthalf);
			if (good (p + 1, 0, 1, 0, 0))
			{
				nsecondhalf = save_cap (p + 1, p + 1, secondhalf);
				for (firstno = 0;  firstno < nfirsthalf;  firstno++)
				{
					firstp = &firsthalf[firstno][p - newword];
					for (secondno = 0;  secondno < nsecondhalf;  secondno++)
					{
						*firstp = ' ';
						icharcpy (firstp + 1, secondhalf[secondno]);
						if (insert (firsthalf[firstno]) < 0)
							return;
						*firstp = '-';
						if (insert (firsthalf[firstno]) < 0)
							return;
					}
				}
			}
		}
	}
}

/*
 * \param word
 * \param pfxopts Options to apply to prefixes
 */
int
ISpellChecker::compoundgood (ichar_t *word, int pfxopts)
{
    ichar_t		newword[INPUTWORDLEN + MAXAFFIXLEN];
    register ichar_t *	p;
    register ichar_t	savech;
    long		secondcap;	/* Capitalization of 2nd half */

    /*
    ** If compoundflag is COMPOUND_NEVER, compound words are never ok.
    */
    if (m_hashheader.compoundflag == COMPOUND_NEVER)
		return 0;
    /*
    ** Test for a possible compound word (for languages like German that
    ** form lots of compounds).
    **
    ** This is similar to missingspace, except we quit on the first hit,
    ** and we won't allow either member of the compound to be a single
    ** letter.
    **
    ** We don't do words of length less than 2 * compoundmin, since
    ** both halves must at least compoundmin letters.
    */
    if (icharlen (word) < 2 * m_hashheader.compoundmin)
		return 0;
    icharcpy (newword, word);
    p = newword + m_hashheader.compoundmin;
    for (  ;  p[m_hashheader.compoundmin - 1] != 0;  p++)
	{
		savech = *p;
		*p = 0;
		if (good (newword, 0, 0, pfxopts, FF_COMPOUNDONLY))
	    {
			*p = savech;
			if (good (p, 0, 1, FF_COMPOUNDONLY, 0)
			  ||  compoundgood (p, FF_COMPOUNDONLY))
			{
				secondcap = whatcap (p);
				switch (whatcap (newword))
				{
				case ANYCASE:
				case CAPITALIZED:
				case FOLLOWCASE:	/* Followcase can have l.c. suffix */
					return secondcap == ANYCASE;
				case ALLCAPS:
					return secondcap == ALLCAPS;
				}
			}
	    }
		else
			*p = savech;
	}
    return 0;
}

/*
 * \param word
 */
void
ISpellChecker::transposedletter (ichar_t *word)
{
    ichar_t		newword[INPUTWORDLEN + MAXAFFIXLEN];
    register ichar_t *	p;
    register ichar_t	temp;

    icharcpy (newword, word);
    for (p = newword;  p[1] != 0;  p++)
	{
		temp = *p;
		*p = p[1];
		p[1] = temp;
		if (good (newword, 0, 1, 0, 0))
	    {
			if (ins_cap (newword, word) < 0)
				return;
	    }
		temp = *p;
		*p = p[1];
		p[1] = temp;
	}
}

/*!
 * Insert one or more correctly capitalized versions of word
 *
 * \param word
 * \param pattern
 *
 * \return
 */
int
ISpellChecker::ins_cap (ichar_t *word, ichar_t *pattern)
{
    int			i;		/* Index into savearea */
    int			nsaved;		/* No. of words saved */
    ichar_t		savearea[MAX_CAPS][INPUTWORDLEN + MAXAFFIXLEN];

    nsaved = save_cap (word, pattern, savearea);
    for (i = 0;  i < nsaved;  i++)
	{
		if (insert (savearea[i]) < 0)
			return -1;
	}
    return 0;
}

/*!
 * Save one or more correctly capitalized versions of word
 *
 * \param word Word to save
 * \param pattern Prototype capitalization pattern
 * \param savearea Room to save words
 *
 * \return
 */
int
ISpellChecker::save_cap (ichar_t *word, ichar_t *pattern, 
					ichar_t savearea[MAX_CAPS][INPUTWORDLEN + MAXAFFIXLEN])
{
    int			hitno;		/* Index into hits array */
    int			nsaved;		/* Number of words saved */
    int			preadd;		/* No. chars added to front of root */
    int			prestrip;	/* No. chars stripped from front */
    int			sufadd;		/* No. chars added to back of root */
    int			sufstrip;	/* No. chars stripped from back */

    if (*word == 0)
		return 0;

    for (hitno = m_numhits, nsaved = 0;  --hitno >= 0  &&  nsaved < MAX_CAPS;  )
	{
		if (m_hits[hitno].prefix)
	    {
			prestrip = m_hits[hitno].prefix->stripl;
			preadd = m_hits[hitno].prefix->affl;
	    }
		else
			prestrip = preadd = 0;
		if (m_hits[hitno].suffix)
	    {
			sufstrip = m_hits[hitno].suffix->stripl;
			sufadd = m_hits[hitno].suffix->affl;
	    }
		else
			sufadd = sufstrip = 0;
		save_root_cap (word, pattern, prestrip, preadd,
			sufstrip, sufadd,
			m_hits[hitno].dictent, m_hits[hitno].prefix, m_hits[hitno].suffix,
			savearea, &nsaved);
	}
    return nsaved;
}

/*
 * \param word
 * \param pattern
 * \param prestrip
 * \param preadd
 * \param sufstrip
 * \param sufadd
 * \param firstdent
 * \param pfxent
 * \param sufent
 *
 * \return
 */
int
ISpellChecker::ins_root_cap (ichar_t *word, ichar_t *pattern, 
				 int prestrip, int preadd, int sufstrip, int sufadd,
  				 struct dent *firstdent, struct flagent *pfxent, struct flagent *sufent)
{
    int			i;		/* Index into savearea */
    ichar_t		savearea[MAX_CAPS][INPUTWORDLEN + MAXAFFIXLEN];
    int			nsaved;		/* Number of words saved */

    nsaved = 0;
    save_root_cap (word, pattern, prestrip, preadd, sufstrip, sufadd,
      firstdent, pfxent, sufent, savearea, &nsaved);
    for (i = 0;  i < nsaved;  i++)
	{
		if (insert (savearea[i]) < 0)
			return -1;
	}
    return 0;
}

/* ARGSUSED */
/*!
 * \param word Word to be saved
 * \param pattern Capitalization pattern
 * \param prestrip No. chars stripped from front
 * \param preadd No. chars added to front of root
 * \param sufstrip No. chars stripped from back
 * \param sufadd No. chars added to back of root
 * \param firstdent First dent for root
 * \param pfxent Pfx-flag entry for word
 * \param sufent Sfx-flag entry for word
 * \param savearea Room to save words
 * \param nsaved Number saved so far (updated)
 */
void
ISpellChecker::save_root_cap (ichar_t *word, ichar_t *pattern, 
						  int prestrip, int preadd, int sufstrip, int sufadd,
						  struct dent *firstdent, struct flagent *pfxent, struct flagent *sufent, 
						  ichar_t savearea[MAX_CAPS][INPUTWORDLEN + MAXAFFIXLEN], 
					      int * nsaved)
{
#ifndef NO_CAPITALIZATION_SUPPORT
    register struct dent * dent;
#endif /* NO_CAPITALIZATION_SUPPORT */
    int			firstisupper;
    ichar_t		newword[INPUTWORDLEN + 4 * MAXAFFIXLEN + 4];
#ifndef NO_CAPITALIZATION_SUPPORT
    register ichar_t *	p;
    int			len;
    int			i;
    int			limit;
#endif /* NO_CAPITALIZATION_SUPPORT */

    if (*nsaved >= MAX_CAPS)
		return;
    icharcpy (newword, word);
    firstisupper = myupper (pattern[0]);
#ifdef NO_CAPITALIZATION_SUPPORT
    /*
    ** Apply the old, simple-minded capitalization rules.
    */
    if (firstisupper)
	{
		if (myupper (pattern[1]))
			upcase (newword);
		else
	    {
			lowcase (newword);
			newword[0] = mytoupper (newword[0]);
	    }
	}
    else
		lowcase (newword);
    icharcpy (savearea[*nsaved], newword);
    (*nsaved)++;
    return;
#else /* NO_CAPITALIZATION_SUPPORT */
#define flagsareok(dent)    \
    ((pfxent == NULL \
	||  TSTMASKBIT (dent->mask, pfxent->flagbit)) \
      &&  (sufent == NULL \
	||  TSTMASKBIT (dent->mask, sufent->flagbit)))

    dent = firstdent;
    if ((dent->flagfield & (CAPTYPEMASK | MOREVARIANTS)) == ALLCAPS)
	{
		upcase (newword);	/* Uppercase required */
		icharcpy (savearea[*nsaved], newword);
		(*nsaved)++;
		return;
	}
    for (p = pattern;  *p;  p++)
	{
		if (mylower (*p))
			break;
	}
    if (*p == 0)
	{
		upcase (newword);	/* Pattern was all caps */
		icharcpy (savearea[*nsaved], newword);
		(*nsaved)++;
		return;
	}
    for (p = pattern + 1;  *p;  p++)
	{
		if (myupper (*p))
			break;
	}
    if (*p == 0)
	{
		/*
		** The pattern was all-lower or capitalized.  If that's
		** legal, insert only that version.
		*/
		if (firstisupper)
		{
			if (captype (dent->flagfield) == CAPITALIZED
			  ||  captype (dent->flagfield) == ANYCASE)
			{
				lowcase (newword);
				newword[0] = mytoupper (newword[0]);
				icharcpy (savearea[*nsaved], newword);
				(*nsaved)++;
				return;
			}
		}
		else
		{
			if (captype (dent->flagfield) == ANYCASE)
			{
				lowcase (newword);
				icharcpy (savearea[*nsaved], newword);
				(*nsaved)++;
				return;
			}
		}
		while (dent->flagfield & MOREVARIANTS)
		{
			dent = dent->next;
			if (captype (dent->flagfield) == FOLLOWCASE
			  ||  !flagsareok (dent))
				continue;
			if (firstisupper)
			{
				if (captype (dent->flagfield) == CAPITALIZED)
				{
					lowcase (newword);
					newword[0] = mytoupper (newword[0]);
					icharcpy (savearea[*nsaved], newword);
					(*nsaved)++;
					return;
				}
			}
			else
			{
				if (captype (dent->flagfield) == ANYCASE)
				{
					lowcase (newword);
					icharcpy (savearea[*nsaved], newword);
					(*nsaved)++;
					return;
				}
			}
	    }
	}
    /*
    ** Either the sample had complex capitalization, or the simple
    ** capitalizations (all-lower or capitalized) are illegal.
    ** Insert all legal capitalizations, including those that are
    ** all-lower or capitalized.  If the prototype is capitalized,
    ** capitalized all-lower samples.  Watch out for affixes.
    */
    dent = firstdent;
    p = strtosichar (dent->word, 1);
    len = icharlen (p);
    if (dent->flagfield & MOREVARIANTS)
		dent = dent->next;	/* Skip place-holder entry */
    for (  ;  ;  )
	{
		if (flagsareok (dent))
	    {
			if (captype (dent->flagfield) != FOLLOWCASE)
			{
				lowcase (newword);
				if (firstisupper  ||  captype (dent->flagfield) == CAPITALIZED)
					newword[0] = mytoupper (newword[0]);
				icharcpy (savearea[*nsaved], newword);
				(*nsaved)++;
				if (*nsaved >= MAX_CAPS)
					return;
			}
			else
			{
				/* Followcase is the tough one. */
				p = strtosichar (dent->word, 1);
				memmove (
				  reinterpret_cast<char *>(newword + preadd),
				  reinterpret_cast<char *>(p + prestrip),
				  (len - prestrip - sufstrip) * sizeof (ichar_t));
				if (myupper (p[prestrip]))
				{
					for (i = 0;  i < preadd;  i++)
						newword[i] = mytoupper (newword[i]);
				}
				else
				{
					for (i = 0;  i < preadd;  i++)
						newword[i] = mytolower (newword[i]);
				}
				limit = len + preadd + sufadd - prestrip - sufstrip;
				i = len + preadd - prestrip - sufstrip;
				p += len - sufstrip - 1;
				if (myupper (*p))
				{
					for (p = newword + i;  i < limit;  i++, p++)
						*p = mytoupper (*p);
				}
				else
				{
					for (p = newword + i;  i < limit;  i++, p++)
						*p = mytolower (*p);
				}
				icharcpy (savearea[*nsaved], newword);
				(*nsaved)++;
				if (*nsaved >= MAX_CAPS)
					return;
			}
	    }
		if ((dent->flagfield & MOREVARIANTS) == 0)
			break;		/* End of the line */
		dent = dent->next;
	}
    return;
#endif /* NO_CAPITALIZATION_SUPPORT */
}