about summary refs log tree commit diff
path: root/locale/programs/charmap.c
blob: 0dbd8d3c3261db7f4e73eda7c66400de99a627ee (plain) (blame)
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
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published
   by the Free Software Foundation; version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <ctype.h>
#include <errno.h>
#include <libintl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

#include "localedef.h"
#include "linereader.h"
#include "charmap.h"
#include "charmap-dir.h"

#include <assert.h>


/* Define the lookup function.  */
#include "charmap-kw.h"


/* Prototypes for local functions.  */
static struct charmap_t *parse_charmap (struct linereader *cmfile,
					int verbose, int be_quiet);
static void new_width (struct linereader *cmfile, struct charmap_t *result,
		       const char *from, const char *to,
		       unsigned long int width);
static void charmap_new_char (struct linereader *lr, struct charmap_t *cm,
			      size_t nbytes, unsigned char *bytes,
			      const char *from, const char *to,
			      int decimal_ellipsis, int step);


bool enc_not_ascii_compatible;


#ifdef NEED_NULL_POINTER
static const char *null_pointer;
#endif

static struct linereader *
cmlr_open (const char *directory, const char *name, kw_hash_fct_t hf)
{
  FILE *fp;

  fp = charmap_open (directory, name);
  if (fp == NULL)
    return NULL;
  else
    {
      size_t dlen = strlen (directory);
      int add_slash = (dlen == 0 || directory[dlen - 1] != '/');
      size_t nlen = strlen (name);
      char *pathname;
      char *p;

      pathname = alloca (dlen + add_slash + nlen + 1);
      p = stpcpy (pathname, directory);
      if (add_slash)
	*p++ = '/';
      stpcpy (p, name);

      return lr_create (fp, pathname, hf);
    }
}

struct charmap_t *
charmap_read (const char *filename, int verbose, int error_not_found,
	      int be_quiet, int use_default)
{
  struct charmap_t *result = NULL;

  if (filename != NULL)
    {
      struct linereader *cmfile;

      /* First try the name as found in the parameter.  */
      cmfile = lr_open (filename, charmap_hash);
      if (cmfile == NULL)
	{
	  /* No successful.  So start looking through the directories
	     in the I18NPATH if this is a simple name.  */
	  if (strchr (filename, '/') == NULL)
	    {
	      char *i18npath = getenv ("I18NPATH");
	      if (i18npath != NULL && *i18npath != '\0')
		{
		  const size_t pathlen = strlen (i18npath);
		  char i18npathbuf[pathlen + 1];
		  char path[pathlen + sizeof ("/charmaps")];
		  char *next;
		  i18npath = memcpy (i18npathbuf, i18npath, pathlen + 1);

		  while (cmfile == NULL
			 && (next = strsep (&i18npath, ":")) != NULL)
		    {
		      stpcpy (stpcpy (path, next), "/charmaps");
		      cmfile = cmlr_open (path, filename, charmap_hash);

		      if (cmfile == NULL)
			/* Try without the "/charmaps" part.  */
			cmfile = cmlr_open (next, filename, charmap_hash);
		    }
		}

	      if (cmfile == NULL)
		/* Try the default directory.  */
		cmfile = cmlr_open (CHARMAP_PATH, filename, charmap_hash);
	    }
	}

      if (cmfile != NULL)
	result = parse_charmap (cmfile, verbose, be_quiet);

      if (result == NULL && error_not_found)
	record_error (0, errno,
		      _("character map file `%s' not found"),
		      filename);
    }

  if (result == NULL && filename != NULL && strchr (filename, '/') == NULL)
    {
      /* OK, one more try.  We also accept the names given to the
	 character sets in the files.  Sometimes they differ from the
	 file name.  */
      CHARMAP_DIR *dir;

      dir = charmap_opendir (CHARMAP_PATH);
      if (dir != NULL)
	{
	  const char *dirent;

	  while ((dirent = charmap_readdir (dir)) != NULL)
	    {
	      char **aliases;
	      char **p;
	      int found;

	      aliases = charmap_aliases (CHARMAP_PATH, dirent);
	      found = 0;
	      for (p = aliases; *p; p++)
		if (strcasecmp (*p, filename) == 0)
		  {
		    found = 1;
		    break;
		  }
	      charmap_free_aliases (aliases);

	      if (found)
		{
		  struct linereader *cmfile;

		  cmfile = cmlr_open (CHARMAP_PATH, dirent, charmap_hash);
		  if (cmfile != NULL)
		    result = parse_charmap (cmfile, verbose, be_quiet);

		  break;
		}
	    }

	  charmap_closedir (dir);
	}
    }

  if (result == NULL && DEFAULT_CHARMAP != NULL)
    {
      struct linereader *cmfile;

      cmfile = cmlr_open (CHARMAP_PATH, DEFAULT_CHARMAP, charmap_hash);
      if (cmfile != NULL)
	result = parse_charmap (cmfile, verbose, be_quiet);

      if (result == NULL)
	record_error (4, errno,
		      _("default character map file `%s' not found"),
		      DEFAULT_CHARMAP);
    }

  if (result != NULL && result->code_set_name == NULL)
    /* The input file does not specify a code set name.  This
       shouldn't happen but we should cope with it.  */
    result->code_set_name = basename (filename);

  /* Test of ASCII compatibility of locale encoding.

     Verify that the encoding to be used in a locale is ASCII compatible,
     at least for the graphic characters, excluding the control characters,
     '$' and '@'.  This constraint comes from an ISO C 99 restriction.

     ISO C 99 section 7.17.(2) (about wchar_t):
       the null character shall have the code value zero and each member of
       the basic character set shall have a code value equal to its value
       when used as the lone character in an integer character constant.
     ISO C 99 section 5.2.1.(3):
       Both the basic source and basic execution character sets shall have
       the following members: the 26 uppercase letters of the Latin alphabet
            A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
       the 26 lowercase letters of the Latin alphabet
            a b c d e f g h i j k l m n o p q r s t u v w x y z
       the 10 decimal digits
            0 1 2 3 4 5 6 7 8 9
       the following 29 graphic characters
            ! " # % & ' ( ) * + , - . / : ; < = > ? [ \ ] ^ _ { | } ~
       the space character, and control characters representing horizontal
       tab, vertical tab, and form feed.

     Therefore, for all members of the "basic character set", the 'char' code
     must have the same value as the 'wchar_t' code, which in glibc is the
     same as the Unicode code, which for all of the enumerated characters
     is identical to the ASCII code. */
  if (result != NULL && use_default)
    {
      static const char basic_charset[] =
	{
	  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
	  'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
	  'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
	  'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
	  '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
	  '!', '"', '#', '%', '&', '\'', '(', ')', '*', '+', ',', '-',
	  '.', '/', ':', ';', '<', '=', '>', '?', '[', '\\', ']', '^',
	  '_', '{', '|', '}', '~', ' ', '\t', '\v', '\f', '\0'
	};
      int failed = 0;
      const char *p = basic_charset;

      do
	{
	  struct charseq *seq = charmap_find_symbol (result, p, 1);

	  if (seq == NULL || seq->ucs4 != (uint32_t) *p)
	    failed = 1;
	}
      while (*p++ != '\0');

      if (failed)
	{
	  /* A user may disable the ASCII compatibility warning check,
	     but we must remember that the encoding is not ASCII
	     compatible, since it may have other implications.  Later
	     we will set _NL_CTYPE_MAP_TO_NONASCII from this value.  */
	  if (warn_ascii)
	    record_warning (_(
"character map `%s' is not ASCII compatible, locale not ISO C compliant "
"[--no-warnings=ascii]"),
			    result->code_set_name);
	  enc_not_ascii_compatible = true;
	}
    }

  return result;
}


static struct charmap_t *
parse_charmap (struct linereader *cmfile, int verbose, int be_quiet)
{
  struct charmap_t *result;
  int state;
  enum token_t expected_tok = tok_error;
  const char *expected_str = NULL;
  char *from_name = NULL;
  char *to_name = NULL;
  enum token_t ellipsis = 0;
  int step = 1;

  /* We don't want symbolic names in string to be translated.  */
  cmfile->translate_strings = 0;

  /* Allocate room for result.  */
  result = (struct charmap_t *) xmalloc (sizeof (struct charmap_t));
  memset (result, '\0', sizeof (struct charmap_t));
  /* The default DEFAULT_WIDTH is 1.  */
  result->width_default = 1;

#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
  obstack_init (&result->mem_pool);

  if (init_hash (&result->char_table, 256)
      || init_hash (&result->byte_table, 256))
    {
      free (result);
      return NULL;
    }

  /* We use a state machine to describe the charmap description file
     format.  */
  state = 1;
  while (1)
    {
      /* What's on?  */
      struct token *now = lr_token (cmfile, NULL, NULL, NULL, verbose);
      enum token_t nowtok = now->tok;
      struct token *arg;

      if (nowtok == tok_eof)
	break;

      switch (state)
	{
	case 1:
	  /* The beginning.  We expect the special declarations, EOL or
	     `CHARMAP'.  */
	  if (nowtok == tok_eol)
	    /* Ignore empty lines.  */
	    continue;

	  if (nowtok == tok_charmap)
	    {
	      from_name = NULL;
	      to_name = NULL;

	      /* We have to set up the real work.  Fill in some
		 default values.  */
	      if (result->mb_cur_max == 0)
		result->mb_cur_max = 1;
	      if (result->mb_cur_min == 0)
		result->mb_cur_min = result->mb_cur_max;
	      if (result->mb_cur_min > result->mb_cur_max)
		{
		  record_error (0, 0, _("\
%s: <mb_cur_max> must be greater than <mb_cur_min>\n"),
				cmfile->fname);

		  result->mb_cur_min = result->mb_cur_max;
		}

	      lr_ignore_rest (cmfile, 1);

	      state = 2;
	      continue;
	    }

	  if (nowtok != tok_code_set_name && nowtok != tok_mb_cur_max
	      && nowtok != tok_mb_cur_min && nowtok != tok_escape_char
	      && nowtok != tok_comment_char && nowtok != tok_g0esc
	      && nowtok != tok_g1esc && nowtok != tok_g2esc
	      && nowtok != tok_g3esc && nowtok != tok_repertoiremap
	      && nowtok != tok_include)
	    {
	      lr_error (cmfile, _("syntax error in prolog: %s"),
			_("invalid definition"));

	      lr_ignore_rest (cmfile, 0);
	      continue;
	    }

	  /* We know that we need an argument.  */
	  arg = lr_token (cmfile, NULL, NULL, NULL, verbose);

	  switch (nowtok)
	    {
	    case tok_code_set_name:
	    case tok_repertoiremap:
	      if (arg->tok != tok_ident && arg->tok != tok_string)
		{
		badarg:
		  lr_error (cmfile, _("syntax error in prolog: %s"),
			    _("bad argument"));

		  lr_ignore_rest (cmfile, 0);
		  continue;
		}

	      if (nowtok == tok_code_set_name)
		result->code_set_name = obstack_copy0 (&result->mem_pool,
						       arg->val.str.startmb,
						       arg->val.str.lenmb);
	      else
		result->repertoiremap = obstack_copy0 (&result->mem_pool,
						       arg->val.str.startmb,
						       arg->val.str.lenmb);

	      lr_ignore_rest (cmfile, 1);
	      continue;

	    case tok_mb_cur_max:
	    case tok_mb_cur_min:
	      if (arg->tok != tok_number)
		goto badarg;

	      if ((nowtok == tok_mb_cur_max
		       && result->mb_cur_max != 0)
		      || (nowtok == tok_mb_cur_max
			  && result->mb_cur_max != 0))
		lr_error (cmfile, _("duplicate definition of <%s>"),
			  nowtok == tok_mb_cur_min
			  ? "mb_cur_min" : "mb_cur_max");

	      if (arg->val.num < 1)
		{
		  lr_error (cmfile,
			    _("value for <%s> must be 1 or greater"),
			    nowtok == tok_mb_cur_min
			    ? "mb_cur_min" : "mb_cur_max");

		  lr_ignore_rest (cmfile, 0);
		  continue;
		}
	      if ((nowtok == tok_mb_cur_max && result->mb_cur_min != 0
		   && (int) arg->val.num < result->mb_cur_min)
		  || (nowtok == tok_mb_cur_min && result->mb_cur_max != 0
		      && (int) arg->val.num > result->mb_cur_max))
		{
		  lr_error (cmfile, _("\
value of <%s> must be greater or equal than the value of <%s>"),
			    "mb_cur_max", "mb_cur_min");

		  lr_ignore_rest (cmfile, 0);
		  continue;
		}

	      if (nowtok == tok_mb_cur_max)
		result->mb_cur_max = arg->val.num;
	      else
		result->mb_cur_min = arg->val.num;

	      lr_ignore_rest (cmfile, 1);
	      continue;

	    case tok_escape_char:
	    case tok_comment_char:
	      if (arg->tok != tok_ident)
		goto badarg;

	      if (arg->val.str.lenmb != 1)
		{
		  lr_error (cmfile, _("\
argument to <%s> must be a single character"),
			    nowtok == tok_escape_char ? "escape_char"
						      : "comment_char");

		  lr_ignore_rest (cmfile, 0);
		  continue;
		}

	      if (nowtok == tok_escape_char)
		cmfile->escape_char = *arg->val.str.startmb;
	      else
		cmfile->comment_char = *arg->val.str.startmb;

	      lr_ignore_rest (cmfile, 1);
	      continue;

	    case tok_g0esc:
	    case tok_g1esc:
	    case tok_g2esc:
	    case tok_g3esc:
	    case tok_escseq:
	      lr_ignore_rest (cmfile, 0); /* XXX */
	      continue;

	    case tok_include:
	      lr_error (cmfile, _("\
character sets with locking states are not supported"));
	      exit (4);

	    default:
	      /* Cannot happen.  */
	      assert (! "Should not happen");
	    }
	  break;

	case 2:
	  /* We have seen `CHARMAP' and now are in the body.  Each line
	     must have the format "%s %s %s\n" or "%s...%s %s %s\n".  */
	  if (nowtok == tok_eol)
	    /* Ignore empty lines.  */
	    continue;

	  if (nowtok == tok_end)
	    {
	      expected_tok = tok_charmap;
	      expected_str = "CHARMAP";
	      state = 90;
	      continue;
	    }

	  if (nowtok != tok_bsymbol && nowtok != tok_ucs4)
	    {
	      lr_error (cmfile, _("syntax error in %s definition: %s"),
			"CHARMAP", _("no symbolic name given"));

	      lr_ignore_rest (cmfile, 0);
	      continue;
	    }

	  /* If the previous line was not completely correct free the
	     used memory.  */
	  if (from_name != NULL)
	    obstack_free (&result->mem_pool, from_name);

	  if (nowtok == tok_bsymbol)
	    from_name = (char *) obstack_copy0 (&result->mem_pool,
						now->val.str.startmb,
						now->val.str.lenmb);
	  else
	    {
	      obstack_printf (&result->mem_pool, "U%08X",
			      cmfile->token.val.ucs4);
	      obstack_1grow (&result->mem_pool, '\0');
	      from_name = (char *) obstack_finish (&result->mem_pool);
	    }
	  to_name = NULL;

	  state = 3;
	  continue;

	case 3:
	  /* We have two possibilities: We can see an ellipsis or an
	     encoding value.  */
	  if (nowtok == tok_ellipsis3 || nowtok == tok_ellipsis4
	      || nowtok == tok_ellipsis2 || nowtok == tok_ellipsis4_2
	      || nowtok == tok_ellipsis2_2)
	    {
	      ellipsis = nowtok;
	      if (nowtok == tok_ellipsis4_2)
		{
		  step = 2;
		  nowtok = tok_ellipsis4;
		}
	      else if (nowtok == tok_ellipsis2_2)
		{
		  step = 2;
		  nowtok = tok_ellipsis2;
		}
	      state = 4;
	      continue;
	    }
	  /* FALLTHROUGH */

	case 5:
	  if (nowtok != tok_charcode)
	    {
	      lr_error (cmfile, _("syntax error in %s definition: %s"),
			"CHARMAP", _("invalid encoding given"));

	      lr_ignore_rest (cmfile, 0);

	      state = 2;
	      continue;
	    }

	  if (now->val.charcode.nbytes < result->mb_cur_min)
	    lr_error (cmfile, _("too few bytes in character encoding"));
	  else if (now->val.charcode.nbytes > result->mb_cur_max)
	    lr_error (cmfile, _("too many bytes in character encoding"));
	  else
	    charmap_new_char (cmfile, result, now->val.charcode.nbytes,
			      now->val.charcode.bytes, from_name, to_name,
			      ellipsis != tok_ellipsis2, step);

	  /* Ignore trailing comment silently.  */
	  lr_ignore_rest (cmfile, 0);

	  from_name = NULL;
	  to_name = NULL;
	  ellipsis = tok_none;
	  step = 1;

	  state = 2;
	  continue;

	case 4:
	  if (nowtok != tok_bsymbol && nowtok != tok_ucs4)
	    {
	      lr_error (cmfile, _("syntax error in %s definition: %s"),
			"CHARMAP",
			_("no symbolic name given for end of range"));

	      lr_ignore_rest (cmfile, 0);
	      continue;
	    }

	  /* Copy the to-name in a safe place.  */
	  if (nowtok == tok_bsymbol)
	    to_name = (char *) obstack_copy0 (&result->mem_pool,
					      cmfile->token.val.str.startmb,
					      cmfile->token.val.str.lenmb);
	  else
	    {
	      obstack_printf (&result->mem_pool, "U%08X",
			      cmfile->token.val.ucs4);
	      obstack_1grow (&result->mem_pool, '\0');
	      to_name = (char *) obstack_finish (&result->mem_pool);
	    }

	  state = 5;
	  continue;

	case 90:
	  if (nowtok != expected_tok)
	    lr_error (cmfile, _("\
%1$s: definition does not end with `END %1$s'"), expected_str);

	  lr_ignore_rest (cmfile, nowtok == expected_tok);
	  state = 91;
	  continue;

	case 91:
	  /* Waiting for WIDTH... */
	  if (nowtok == tok_eol)
	    /* Ignore empty lines.  */
	    continue;

	  if (nowtok == tok_width_default)
	    {
	      state = 92;
	      continue;
	    }

	  if (nowtok == tok_width)
	    {
	      lr_ignore_rest (cmfile, 1);
	      state = 93;
	      continue;
	    }

	  if (nowtok == tok_width_variable)
	    {
	      lr_ignore_rest (cmfile, 1);
	      state = 98;
	      continue;
	    }

	  lr_error (cmfile, _("\
only WIDTH definitions are allowed to follow the CHARMAP definition"));

	  lr_ignore_rest (cmfile, 0);
	  continue;

	case 92:
	  if (nowtok != tok_number)
	    lr_error (cmfile, _("value for %s must be an integer"),
		      "WIDTH_DEFAULT");
	  else
	    result->width_default = now->val.num;

	  lr_ignore_rest (cmfile, nowtok == tok_number);

	  state = 91;
	  continue;

	case 93:
	  /* We now expect `END WIDTH' or lines of the format "%s %d\n" or
	     "%s...%s %d\n".  */
	  if (nowtok == tok_eol)
	    /* ignore empty lines.  */
	    continue;

	  if (nowtok == tok_end)
	    {
	      expected_tok = tok_width;
	      expected_str = "WIDTH";
	      state = 90;
	      continue;
	    }

	  if (nowtok != tok_bsymbol && nowtok != tok_ucs4)
	    {
	      lr_error (cmfile, _("syntax error in %s definition: %s"),
			"WIDTH", _("no symbolic name given"));

	      lr_ignore_rest (cmfile, 0);
	      continue;
	    }

	  if (from_name != NULL)
	    obstack_free (&result->mem_pool, from_name);

	  if (nowtok == tok_bsymbol)
	    from_name = (char *) obstack_copy0 (&result->mem_pool,
						now->val.str.startmb,
						now->val.str.lenmb);
	  else
	    {
	      obstack_printf (&result->mem_pool, "U%08X",
			      cmfile->token.val.ucs4);
	      obstack_1grow (&result->mem_pool, '\0');
	      from_name = (char *) obstack_finish (&result->mem_pool);
	    }

	  to_name = NULL;

	  state = 94;
	  continue;

	case 94:
	  if (nowtok == tok_ellipsis3)
	    {
	      state = 95;
	      continue;
	    }
	  /* Fall through.  */

	case 96:
	  if (nowtok != tok_number)
	    lr_error (cmfile, _("value for %s must be an integer"),
		      "WIDTH");
	  else
	    {
	      /* Store width for chars.  */
	      new_width (cmfile, result, from_name, to_name, now->val.num);

	      from_name = NULL;
	      to_name = NULL;
	    }

	  lr_ignore_rest (cmfile, nowtok == tok_number);

	  state = 93;
	  continue;

	case 95:
	  if (nowtok != tok_bsymbol && nowtok != tok_ucs4)
	    {
	      lr_error (cmfile, _("syntax error in %s definition: %s"),
			"WIDTH", _("no symbolic name given for end of range"));

	      lr_ignore_rest (cmfile, 0);

	      state = 93;
	      continue;
	    }

	  if (nowtok == tok_bsymbol)
	    to_name = (char *) obstack_copy0 (&result->mem_pool,
					      now->val.str.startmb,
					      now->val.str.lenmb);
	  else
	    {
	      obstack_printf (&result->mem_pool, "U%08X",
			      cmfile->token.val.ucs4);
	      obstack_1grow (&result->mem_pool, '\0');
	      to_name = (char *) obstack_finish (&result->mem_pool);
	    }

	  state = 96;
	  continue;

	case 98:
	  /* We now expect `END WIDTH_VARIABLE' or lines of the format
	     "%s\n" or "%s...%s\n".  */
	  if (nowtok == tok_eol)
	    /* ignore empty lines.  */
	    continue;

	  if (nowtok == tok_end)
	    {
	      expected_tok = tok_width_variable;
	      expected_str = "WIDTH_VARIABLE";
	      state = 90;
	      continue;
	    }

	  if (nowtok != tok_bsymbol && nowtok != tok_ucs4)
	    {
	      lr_error (cmfile, _("syntax error in %s definition: %s"),
			"WIDTH_VARIABLE", _("no symbolic name given"));

	      lr_ignore_rest (cmfile, 0);

	      continue;
	    }

	  if (from_name != NULL)
	    obstack_free (&result->mem_pool, from_name);

	  if (nowtok == tok_bsymbol)
	    from_name = (char *) obstack_copy0 (&result->mem_pool,
						now->val.str.startmb,
						now->val.str.lenmb);
	  else
	    {
	      obstack_printf (&result->mem_pool, "U%08X",
			      cmfile->token.val.ucs4);
	      obstack_1grow (&result->mem_pool, '\0');
	      from_name = (char *) obstack_finish (&result->mem_pool);
	    }
	  to_name = NULL;

	  state = 99;
	  continue;

	case 99:
	  if (nowtok == tok_ellipsis3)
	    state = 100;

	  /* Store info.  */
	  from_name = NULL;

	  /* Warn */
	  state = 98;
	  continue;

	case 100:
	  if (nowtok != tok_bsymbol && nowtok != tok_ucs4)
	    {
	      lr_error (cmfile, _("syntax error in %s definition: %s"),
			"WIDTH_VARIABLE",
			_("no symbolic name given for end of range"));
	      lr_ignore_rest (cmfile, 0);
	      continue;
	    }

	  if (nowtok == tok_bsymbol)
	    to_name = (char *) obstack_copy0 (&result->mem_pool,
					      now->val.str.startmb,
					      now->val.str.lenmb);
	  else
	    {
	      obstack_printf (&result->mem_pool, "U%08X",
			      cmfile->token.val.ucs4);
	      obstack_1grow (&result->mem_pool, '\0');
	      to_name = (char *) obstack_finish (&result->mem_pool);
	    }

	  /* XXX Enter value into table.  */

	  lr_ignore_rest (cmfile, 1);

	  state = 98;
	  continue;

	default:
	  record_error (5, 0, _("%s: error in state machine"),
			__FILE__);
	  /* NOTREACHED */
	}
      break;
    }

  if (state != 91)
    record_error (0, 0, _("%s: premature end of file"),
		  cmfile->fname);

  lr_close (cmfile);

  return result;
}


static void
new_width (struct linereader *cmfile, struct charmap_t *result,
	   const char *from, const char *to, unsigned long int width)
{
  struct charseq *from_val;
  struct charseq *to_val;

  from_val = charmap_find_value (result, from, strlen (from));
  if (from_val == NULL)
    {
      lr_error (cmfile, _("unknown character `%s'"), from);
      return;
    }

  if (to == NULL)
    to_val = from_val;
  else
    {
      to_val = charmap_find_value (result, to, strlen (to));
      if (to_val == NULL)
	{
	  lr_error (cmfile, _("unknown character `%s'"), to);
	  return;
	}

      /* Make sure the number of bytes for the end points of the range
	 is correct.  */
      if (from_val->nbytes != to_val->nbytes)
	{
	  lr_error (cmfile, _("\
number of bytes for byte sequence of beginning and end of range not the same: %d vs %d"),
		    from_val->nbytes, to_val->nbytes);
	  return;
	}
    }

  if (result->nwidth_rules >= result->nwidth_rules_max)
    {
      size_t new_size = result->nwidth_rules + 32;
      struct width_rule *new_rules =
	(struct width_rule *) obstack_alloc (&result->mem_pool,
					     (new_size
					      * sizeof (struct width_rule)));

      memcpy (new_rules, result->width_rules,
	      result->nwidth_rules_max * sizeof (struct width_rule));

      result->width_rules = new_rules;
      result->nwidth_rules_max = new_size;
    }

  result->width_rules[result->nwidth_rules].from = from_val;
  result->width_rules[result->nwidth_rules].to = to_val;
  result->width_rules[result->nwidth_rules].width = (unsigned int) width;
  ++result->nwidth_rules;
}


struct charseq *
charmap_find_value (const struct charmap_t *cm, const char *name, size_t len)
{
  void *result;

  return (find_entry ((hash_table *) &cm->char_table, name, len, &result)
	  < 0 ? NULL : (struct charseq *) result);
}


static void
charmap_new_char (struct linereader *lr, struct charmap_t *cm,
		  size_t nbytes, unsigned char *bytes,
		  const char *from, const char *to,
		  int decimal_ellipsis, int step)
{
  hash_table *ht = &cm->char_table;
  hash_table *bt = &cm->byte_table;
  struct obstack *ob = &cm->mem_pool;
  char *from_end;
  char *to_end;
  const char *cp;
  int prefix_len, len1, len2;
  unsigned int from_nr, to_nr, cnt;
  struct charseq *newp;

  len1 = strlen (from);

  if (to == NULL)
    {
      newp = (struct charseq *) obstack_alloc (ob, sizeof (*newp) + nbytes);
      newp->nbytes = nbytes;
      memcpy (newp->bytes, bytes, nbytes);
      newp->name = from;

      newp->ucs4 = UNINITIALIZED_CHAR_VALUE;
      if ((from[0] == 'U' || from[0] == 'P') && (len1 == 5 || len1 == 9))
	{
	  /* Maybe the name is of the form `Uxxxx' or `Uxxxxxxxx' where
	     xxxx and xxxxxxxx are hexadecimal numbers.  In this case
	     we use the value of xxxx or xxxxxxxx as the UCS4 value of
	     this character and we don't have to consult the repertoire
	     map.

	     If the name is of the form `Pxxxx' or `Pxxxxxxxx' the xxxx
	     and xxxxxxxx also give the code point in UCS4 but this must
	     be in the private, i.e., unassigned, area.  This should be
	     used for characters which do not (yet) have an equivalent
	     in ISO 10646 and Unicode.  */
	  char *endp;

	  errno = 0;
	  newp->ucs4 = strtoul (from + 1, &endp, 16);
	  if (endp - from != len1
	      || (newp->ucs4 == ~((uint32_t) 0) && errno == ERANGE)
	      || newp->ucs4 >= 0x80000000)
	    /* This wasn't successful.  Signal this name cannot be a
	       correct UCS value.  */
	    newp->ucs4 = UNINITIALIZED_CHAR_VALUE;
	}

      insert_entry (ht, from, len1, newp);
      insert_entry (bt, newp->bytes, nbytes, newp);
      /* Please note that it isn't a bug if a symbol is defined more
	 than once.  All later definitions are simply discarded.  */
      return;
    }

  /* We have a range: the names must have names with equal prefixes
     and an equal number of digits, where the second number is greater
     or equal than the first.  */
  len2 = strlen (to);

  if (len1 != len2)
    {
    illegal_range:
      lr_error (lr, _("invalid names for character range"));
      return;
    }

  cp = &from[len1 - 1];
  if (decimal_ellipsis)
    while (isdigit (*cp) && cp >= from)
      --cp;
  else
    while (isxdigit (*cp) && cp >= from)
      {
	if (!isdigit (*cp) && !isupper (*cp))
	  lr_error (lr, _("\
hexadecimal range format should use only capital characters"));
	--cp;
      }

  prefix_len = (cp - from) + 1;

  if (cp == &from[len1 - 1] || strncmp (from, to, prefix_len) != 0)
    goto illegal_range;

  errno = 0;
  from_nr = strtoul (&from[prefix_len], &from_end, decimal_ellipsis ? 10 : 16);
  if (*from_end != '\0' || (from_nr == UINT_MAX && errno == ERANGE)
      || ((to_nr = strtoul (&to[prefix_len], &to_end,
			    decimal_ellipsis ? 10 : 16)) == UINT_MAX
	  && errno == ERANGE)
      || *to_end != '\0')
    {
      lr_error (lr, _("<%s> and <%s> are invalid names for range"), from, to);
      return;
    }

  if (from_nr > to_nr)
    {
      lr_error (lr, _("upper limit in range is smaller than lower limit"));
      return;
    }

  for (cnt = from_nr; cnt <= to_nr; cnt += step)
    {
      char *name_end;
      obstack_printf (ob, decimal_ellipsis ? "%.*s%0*d" : "%.*s%0*X",
		      prefix_len, from, len1 - prefix_len, cnt);
      obstack_1grow (ob, '\0');
      name_end = obstack_finish (ob);

      newp = (struct charseq *) obstack_alloc (ob, sizeof (*newp) + nbytes);
      newp->nbytes = nbytes;
      memcpy (newp->bytes, bytes, nbytes);
      newp->name = name_end;

      newp->ucs4 = UNINITIALIZED_CHAR_VALUE;
      if ((name_end[0] == 'U' || name_end[0] == 'P')
	  && (len1 == 5 || len1 == 9))
	{
	  /* Maybe the name is of the form `Uxxxx' or `Uxxxxxxxx' where
	     xxxx and xxxxxxxx are hexadecimal numbers.  In this case
	     we use the value of xxxx or xxxxxxxx as the UCS4 value of
	     this character and we don't have to consult the repertoire
	     map.

	     If the name is of the form `Pxxxx' or `Pxxxxxxxx' the xxxx
	     and xxxxxxxx also give the code point in UCS4 but this must
	     be in the private, i.e., unassigned, area.  This should be
	     used for characters which do not (yet) have an equivalent
	     in ISO 10646 and Unicode.  */
	  char *endp;

	  errno = 0;
	  newp->ucs4 = strtoul (name_end + 1, &endp, 16);
	  if (endp - name_end != len1
	      || (newp->ucs4 == ~((uint32_t) 0) && errno == ERANGE)
	      || newp->ucs4 >= 0x80000000)
	    /* This wasn't successful.  Signal this name cannot be a
	       correct UCS value.  */
	    newp->ucs4 = UNINITIALIZED_CHAR_VALUE;
	}

      insert_entry (ht, name_end, len1, newp);
      insert_entry (bt, newp->bytes, nbytes, newp);
      /* Please note we don't examine the return value since it is no error
	 if we have two definitions for a symbol.  */

      /* Increment the value in the byte sequence.  */
      if (++bytes[nbytes - 1] == '\0')
	{
	  int b = nbytes - 2;

	  do
	    if (b < 0)
	      {
		lr_error (lr,
			  _("resulting bytes for range not representable."));
		return;
	      }
	  while (++bytes[b--] == 0);
	}
    }
}


struct charseq *
charmap_find_symbol (const struct charmap_t *cm, const char *bytes,
		     size_t nbytes)
{
  void *result;

  return (find_entry ((hash_table *) &cm->byte_table, bytes, nbytes, &result)
	  < 0 ? NULL : (struct charseq *) result);
}