aboutsummaryrefslogtreecommitdiff
path: root/locale/programs/repertoire.c
blob: 28e4bcc15fcfd4e33975cf1fd50378389250edf2 (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
/* Copyright (C) 1998-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   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 <errno.h>
#include <error.h>
#include <limits.h>
#include <obstack.h>
#include <search.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>

#include "localedef.h"
#include "linereader.h"
#include "charmap.h"
#include "repertoire.h"
#include "simple-hash.h"


/* Simple keyword hashing for the repertoiremap.  */
static const struct keyword_t *repertoiremap_hash (const char *str,
						   unsigned int len);
static void repertoire_new_char (struct linereader *lr, hash_table *ht,
				 hash_table *rt, struct obstack *ob,
				 uint32_t value, const char *from,
				 const char *to, int decimal_ellipsis);
static int repertoire_compare (const void *p1, const void *p2);

/* Already known repertoire maps.  */
static void *known;

/* List of repertoire maps which are not available and which have been
   reported to not be.  */
static void *unavailable;


struct repertoire_t *
repertoire_read (const char *filename)
{
  struct linereader *repfile;
  struct repertoire_t *result;
  struct repertoire_t **resultp;
  struct repertoire_t search;
  int state;
  char *from_name = NULL;
  char *to_name = NULL;
  enum token_t ellipsis = tok_none;

  search.name = filename;
  resultp = tfind (&search, &known, &repertoire_compare);
  if (resultp != NULL)
    return *resultp;

  /* Determine path.  */
  repfile = lr_open (filename, repertoiremap_hash);
  if (repfile == NULL)
    {
      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[strlen (filename) + 1 + pathlen
		        + sizeof ("/repertoiremaps/") - 1];
	      char *next;
	      i18npath = memcpy (i18npathbuf, i18npath, pathlen + 1);

	      while (repfile == NULL
		     && (next = strsep (&i18npath, ":")) != NULL)
		{
		  stpcpy (stpcpy (stpcpy (path, next), "/repertoiremaps/"),
			  filename);

		  repfile = lr_open (path, repertoiremap_hash);

		  if (repfile == NULL)
		    {
		      stpcpy (stpcpy (path, next), filename);

		      repfile = lr_open (path, repertoiremap_hash);
		    }
		}
	    }

	  if (repfile == NULL)
	    {
	      /* Look in the systems charmap directory.  */
	      char *buf = xmalloc (strlen (filename) + 1
				   + sizeof (REPERTOIREMAP_PATH));

	      stpcpy (stpcpy (stpcpy (buf, REPERTOIREMAP_PATH), "/"),
		      filename);
	      repfile = lr_open (buf, repertoiremap_hash);

	      free (buf);
	    }
	}

      if (repfile == NULL)
	return NULL;
    }

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

  /* Allocate room for result.  */
  result = (struct repertoire_t *) xmalloc (sizeof (struct repertoire_t));
  memset (result, '\0', sizeof (struct repertoire_t));

  result->name = xstrdup (filename);

#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->reverse_table, 256)
      || init_hash (&result->seq_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 (repfile, NULL, NULL, NULL, verbose);
      enum token_t nowtok = now->tok;
      struct token *arg;

      if (nowtok == tok_eof)
	break;

      switch (state)
	{
	case 1:
	  /* We haven't yet read any character definition.  This is where
	     we accept escape_char and comment_char definitions.  */
	  if (nowtok == tok_eol)
	    /* Ignore empty lines.  */
	    continue;

	  if (nowtok == tok_escape_char || nowtok == tok_comment_char)
	    {
	      /* We know that we need an argument.  */
	      arg = lr_token (repfile, NULL, NULL, NULL, verbose);

	      if (arg->tok != tok_ident)
		{
		  lr_error (repfile, _("syntax error in prolog: %s"),
			    _("bad argument"));

		  lr_ignore_rest (repfile, 0);
		  continue;
		}

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

		  lr_ignore_rest (repfile, 0);
		  continue;
		}

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

	      lr_ignore_rest (repfile, 1);
	      continue;
	    }

	  if (nowtok == tok_charids)
	    {
	      lr_ignore_rest (repfile, 1);

	      state = 2;
	      continue;
	    }

	  /* Otherwise we start reading the character definitions.  */
	  state = 2;
	  /* FALLTHROUGH */

	case 2:
	  /* We are 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)
	    {
	      state = 90;
	      continue;
	    }

	  if (nowtok != tok_bsymbol)
	    {
	      lr_error (repfile,
			_("syntax error in repertoire map definition: %s"),
			_("no symbolic name given"));

	      lr_ignore_rest (repfile, 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);

	  from_name = (char *) obstack_copy0 (&result->mem_pool,
					      now->val.str.startmb,
					      now->val.str.lenmb);
	  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)
	    {
	      ellipsis = nowtok;
	      state = 4;
	      continue;
	    }
	  /* FALLTHROUGH */

	case 5:
	  /* We expect a value of the form <Uxxxx> or <Uxxxxxxxx> where
	     the xxx mean a hexadecimal value.  */
	  state = 2;

	  errno = 0;
	  if (nowtok != tok_ucs4)
	    {
	      lr_error (repfile,
			_("syntax error in repertoire map definition: %s"),
			_("no <Uxxxx> or <Uxxxxxxxx> value given"));

	      lr_ignore_rest (repfile, 0);
	      continue;
	    }

	  /* We've found a new valid definition.  */
	  repertoire_new_char (repfile, &result->char_table,
			       &result->reverse_table, &result->mem_pool,
			       now->val.ucs4, from_name, to_name,
			       ellipsis != tok_ellipsis2);

	  /* Ignore the rest of the line.  */
	  lr_ignore_rest (repfile, 0);

	  from_name = NULL;
	  to_name = NULL;

	  continue;

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

	      lr_ignore_rest (repfile, 0);
	      state = 2;
	      continue;
	    }

	  /* Copy the to-name in a safe place.  */
	  to_name = (char *) obstack_copy0 (&result->mem_pool,
					    repfile->token.val.str.startmb,
					    repfile->token.val.str.lenmb);

	  state = 5;
	  continue;

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

	  lr_ignore_rest (repfile, nowtok == tok_charids);
	  break;
	}

      break;
    }

  if (state != 2 && state != 90 && !be_quiet)
    WITH_CUR_LOCALE (error (0, 0, _("%s: premature end of file"),
			    repfile->fname));

  lr_close (repfile);

  if (tsearch (result, &known, &repertoire_compare) == NULL)
    /* Something went wrong.  */
    WITH_CUR_LOCALE (error (0, errno, _("cannot save new repertoire map")));

  return result;
}


void
repertoire_complain (const char *name)
{
  if (tfind (name, &unavailable, (__compar_fn_t) strcmp) == NULL)
    {
      WITH_CUR_LOCALE (error (0, errno, _("\
repertoire map file `%s' not found"), name));

      /* Remember that we reported this map.  */
      tsearch (name, &unavailable, (__compar_fn_t) strcmp);
    }
}


static int
repertoire_compare (const void *p1, const void *p2)
{
  struct repertoire_t *r1 = (struct repertoire_t *) p1;
  struct repertoire_t *r2 = (struct repertoire_t *) p2;

  return strcmp (r1->name, r2->name);
}


static const struct keyword_t *
repertoiremap_hash (const char *str, unsigned int len)
{
  static const struct keyword_t wordlist[] =
  {
    {"escape_char",      tok_escape_char,     0},
    {"comment_char",     tok_comment_char,    0},
    {"CHARIDS",          tok_charids,         0},
    {"END",              tok_end,             0},
  };

  if (len == 11 && memcmp (wordlist[0].name, str, 11) == 0)
    return &wordlist[0];
  if (len == 12 && memcmp (wordlist[1].name, str, 12) == 0)
    return &wordlist[1];
  if (len == 7 && memcmp (wordlist[2].name, str, 7) == 0)
    return &wordlist[2];
  if (len == 3 && memcmp (wordlist[3].name, str, 3) == 0)
    return &wordlist[3];

  return NULL;
}


static void
repertoire_new_char (struct linereader *lr, hash_table *ht, hash_table *rt,
		     struct obstack *ob, uint32_t value, const char *from,
		     const char *to, int decimal_ellipsis)
{
  char *from_end;
  char *to_end;
  const char *cp;
  char *buf = NULL;
  int prefix_len, len1, len2;
  unsigned long int from_nr, to_nr, cnt;

  if (to == NULL)
    {
      insert_entry (ht, from, strlen (from),
		    (void *) (unsigned long int) value);
      /* Please note that it isn't a bug if a symbol is defined more
	 than once.  All later definitions are simply discarded.  */

      insert_entry (rt, obstack_copy (ob, &value, sizeof (value)),
		    sizeof (value), (void *) from);

      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.  */
  len1 = strlen (from);
  len2 = strlen (to);

  if (len1 != len2)
    {
    invalid_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 invalid_range;

  errno = 0;
  from_nr = strtoul (&from[prefix_len], &from_end, decimal_ellipsis ? 10 : 16);
  if (*from_end != '\0' || (from_nr == ULONG_MAX && errno == ERANGE)
      || ((to_nr = strtoul (&to[prefix_len], &to_end,
			    decimal_ellipsis ? 10 : 16)) == ULONG_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)
    {
      uint32_t this_value = value + (cnt - from_nr);

      obstack_printf (ob, decimal_ellipsis ? "%.*s%0*ld" : "%.*s%0*lX",
		      prefix_len, from, len1 - prefix_len, cnt);
      obstack_1grow (ob, '\0');

      insert_entry (ht, buf, len1,
		    (void *) (unsigned long int) this_value);
      /* Please note we don't examine the return value since it is no error
	 if we have two definitions for a symbol.  */

      insert_entry (rt, obstack_copy (ob, &this_value, sizeof (this_value)),
		    sizeof (this_value), (void *) from);
    }
}


uint32_t
repertoire_find_value (const struct repertoire_t *rep, const char *name,
		       size_t len)
{
  void *result;

  if (rep == NULL)
    return ILLEGAL_CHAR_VALUE;

  if (find_entry ((hash_table *) &rep->char_table, name, len, &result) < 0)
    return ILLEGAL_CHAR_VALUE;

  return (uint32_t) ((unsigned long int) result);
}


const char *
repertoire_find_symbol (const struct repertoire_t *rep, uint32_t ucs)
{
  void *result;

  if (rep == NULL)
    return NULL;

  if (find_entry ((hash_table *) &rep->reverse_table, &ucs, sizeof (ucs),
		  &result) < 0)
    return NULL;

  return (const char *) result;
}


struct charseq *
repertoire_find_seq (const struct repertoire_t *rep, uint32_t ucs)
{
  void *result;

  if (rep == NULL)
    return NULL;

  if (find_entry ((hash_table *) &rep->seq_table, &ucs, sizeof (ucs),
		  &result) < 0)
    return NULL;

  return (struct charseq *) result;
}