summary refs log tree commit diff
path: root/intl/finddomain.c
blob: 45773ee30687f643ede769e2fd2c1da214d21362 (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
/* finddomain.c -- handle list of needed message catalogs
   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.

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; either version 2, 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

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

#include <errno.h>
#include <stdio.h>
#include <sys/types.h>

#if defined STDC_HEADERS || defined _LIBC
# include <stdlib.h>
#else
# ifdef HAVE_MALLOC_H
#  include <malloc.h>
# else
void free ();
# endif
#endif

#if defined HAVE_STRING_H || defined _LIBC
# include <string.h>
#else
# include <strings.h>
#endif
#if !HAVE_STRCHR && !defined _LIBC
# ifndef strchr
#  define strchr index
# endif
#endif

#if defined HAVE_UNISTD_H || defined _LIBC
# include <unistd.h>
#endif

#include "gettext.h"
#include "gettextP.h"
#ifdef _LIBC
# include <libintl.h>
#else
# include "libgettext.h"
#endif

/* @@ end of prolog @@ */

#ifdef _LIBC
/* Rename the non ANSI C functions.  This is required by the standard
   because some ANSI C functions will require linking with this object
   file and the name space must not be polluted.  */
# define stpcpy(dest, src) __stpcpy(dest, src)
#endif

/* Encoding of locale name parts.  */
#define CEN_REVISION		1
#define CEN_SPONSOR		2
#define CEN_SPECIAL		4
#define XPG_NORM_CODESET	8
#define XPG_CODESET		16
#define TERRITORY		32
#define CEN_AUDIENCE		64
#define XPG_MODIFIER		128

#define CEN_SPECIFIC	(CEN_REVISION|CEN_SPONSOR|CEN_SPECIAL|CEN_AUDIENCE)
#define XPG_SPECIFIC	(XPG_CODESET|XPG_NORM_CODESET|XPG_MODIFIER)


/* List of already loaded domains.  */
static struct loaded_domain *_nl_loaded_domains;

/* Prototypes for local functions.  */
static struct loaded_domain *make_entry_rec PARAMS ((const char *dirname,
						     int mask,
						     const char *language,
						     const char *territory,
						     const char *codeset,
						     const char *normalized_codeset,
						     const char *modifier,
						     const char *special,
						     const char *sponsor,
						     const char *revision,
						     const char *domainname,
						     int do_allocate));

/* Normalize name of selected codeset.  */
static const char *normalize_codeset PARAMS ((const char *codeset));

/* Substitution for systems lacking this function in their C library.  */
#if !_LIBC && !HAVE_STPCPY
static char *stpcpy__ PARAMS ((char *dest, const char *src));
# define stpcpy(dest, src) stpcpy__ (dest, src)
#endif


/* Return a data structure describing the message catalog described by
   the DOMAINNAME and CATEGORY parameters with respect to the currently
   established bindings.  */
struct loaded_domain *
_nl_find_domain (dirname, locale, domainname)
     const char *dirname;
     char *locale;
     const char *domainname;
{
  enum { undecided, xpg, cen } syntax;
  struct loaded_domain *retval;
  const char *language;
  const char *modifier = NULL;
  const char *territory = NULL;
  const char *codeset = NULL;
  const char *normalized_codeset = NULL;
  const char *special = NULL;
  const char *sponsor = NULL;
  const char *revision = NULL;
  const char *alias_value = NULL;
  char *cp;
  int mask;

  /* CATEGORYVALUE now possibly contains a colon separated list of
     locales.  Each single locale can consist of up to four recognized
     parts for the XPG syntax:

		language[_territory[.codeset]][@modifier]

     and six parts for the CEN syntax:

	language[_territory][+audience][+special][,sponsor][_revision]

     Beside the first all of them are allowed to be missing.  If the
     full specified locale is not found, the less specific one are
     looked for.  The various part will be stripped of according to
     the following order:
		(1) revision
		(2) sponsor
		(3) special
		(4) codeset
		(5) normalized codeset
		(6) territory
		(7) audience/modifier
   */

  /* If we have already tested for this locale entry there has to
     be one data set in the list of loaded domains.  */
  retval = make_entry_rec (dirname, 0, locale, NULL, NULL, NULL, NULL,
			   NULL, NULL, NULL, domainname, 0);
  if (retval != NULL)
    {
      /* We know something about this locale.  */
      int cnt;

      if (retval->decided == 0)
	_nl_load_domain (retval); /* @@@ */

      if (retval->data != NULL)
	return retval;

      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
	{
	  if (retval->successor[cnt]->decided == 0)
	    _nl_load_domain (retval->successor[cnt]);

	  if (retval->successor[cnt]->data != NULL)
	    break;
	}

      /* We really found some usable information.  */
      return cnt >= 0 ? retval : NULL;
      /* NOTREACHED */
    }

  /* See whether the locale value is an alias.  If yes its value
     *overwrites* the alias name.  No test for the original value is
     done.  */
  alias_value = _nl_expand_alias (locale);
  if (alias_value != NULL)
    {
      size_t len = strlen (alias_value) + 1;
      locale = (char *) malloc (len);
      if (locale == NULL)
	return NULL;

      memcpy (locale, alias_value, len);
    }

  /* Now we determine the single parts of the locale name.  First
     look for the language.  Termination symbols are `_' and `@' if
     we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
  mask = 0;
  syntax = undecided;
  language = cp = locale;
  while (cp[0] != '\0' && cp[0] != '_' && cp[0] != '@'
	 && cp[0] != '+' && cp[0] != ',')
    ++cp;

  if (language == cp)
    /* This does not make sense: language has to be specified.  Use
       this entry as it is without exploding.  Perhaps it is an alias.  */
    cp = strchr (language, '\0');
  else if (cp[0] == '_')
    {
      /* Next is the territory.  */
      cp[0] = '\0';
      territory = ++cp;

      while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@'
	     && cp[0] != '+' && cp[0] != ',' && cp[0] != '_')
	++cp;

      mask |= TERRITORY;

      if (cp[0] == '.')
	{
	  /* Next is the codeset.  */
	  syntax = xpg;
	  cp[0] = '\0';
	  codeset = ++cp;

	  while (cp[0] != '\0' && cp[0] != '@')
	    ++cp;

	  mask |= XPG_CODESET;

	  if (codeset != cp && codeset[0] != '\0')
	    {
	      normalized_codeset = normalize_codeset (codeset);
	      if (strcmp (codeset, normalized_codeset) == 0)
		free ((char *) normalized_codeset);
	      else
		mask |= XPG_NORM_CODESET;
	    }
	}
    }

  if (cp[0] == '@' || (syntax != xpg && cp[0] == '+'))
    {
      /* Next is the modifier.  */
      syntax = cp[0] == '@' ? xpg : cen;
      cp[0] = '\0';
      modifier = ++cp;

      while (syntax == cen && cp[0] != '\0' && cp[0] != '+'
	     && cp[0] != ',' && cp[0] != '_')
	++cp;

      mask |= XPG_MODIFIER | CEN_AUDIENCE;
    }

  if (syntax != xpg && (cp[0] == '+' || cp[0] == ',' || cp[0] == '_'))
    {
      syntax = cen;

      if (cp[0] == '+')
	{
 	  /* Next is special application (CEN syntax).  */
	  cp[0] = '\0';
	  special = ++cp;

	  while (cp[0] != '\0' && cp[0] != ',' && cp[0] != '_')
	    ++cp;

	  mask |= CEN_SPECIAL;
	}

      if (cp[0] == ',')
	{
 	  /* Next is sponsor (CEN syntax).  */
	  cp[0] = '\0';
	  sponsor = ++cp;

	  while (cp[0] != '\0' && cp[0] != '_')
	    ++cp;

	  mask |= CEN_SPONSOR;
	}

      if (cp[0] == '_')
	{
 	  /* Next is revision (CEN syntax).  */
	  cp[0] = '\0';
	  revision = ++cp;

	  mask |= CEN_REVISION;
	}
    }

  /* For CEN sytnax values it might be important to have the
     separator character in the file name, not for XPG syntax.  */
  if (syntax == xpg)
    {
      if (territory != NULL && territory[0] == '\0')
	mask &= ~TERRITORY;

      if (codeset != NULL && codeset[0] == '\0')
	mask &= ~XPG_CODESET;

      if (modifier != NULL && modifier[0] == '\0')
	mask &= ~XPG_MODIFIER;
    }

  /* Create all possible locale entries which might be interested in
     generalzation.  */
  retval = make_entry_rec (dirname, mask, language, territory, codeset,
			   normalized_codeset, modifier, special, sponsor,
			   revision, domainname, 1);
  if (retval == NULL)
    /* This means we are out of core.  */
    return NULL;

  if (retval->decided == 0)
    _nl_load_domain (retval);
  if (retval->data == NULL)
    {
      int cnt;
      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)
	{
	  if (retval->successor[cnt]->decided == 0)
	    _nl_load_domain (retval->successor[cnt]);
	  if (retval->successor[cnt]->data != NULL)
	    break;

	  /* Signal that locale is not available.  */
	  retval->successor[cnt] = NULL;
	}
      if (retval->successor[cnt] == NULL)
	retval = NULL;
    }

  /* The room for an alias was dynamically allocated.  Free it now.  */
  if (alias_value != NULL)
    free (locale);

  return retval;
}


static struct loaded_domain *
make_entry_rec (dirname, mask, language, territory, codeset,
		normalized_codeset, modifier, special, sponsor, revision,
		domain, do_allocate)
     const char *dirname;
     int mask;
     const char *language;
     const char *territory;
     const char *codeset;
     const char *normalized_codeset;
     const char *modifier;
     const char *special;
     const char *sponsor;
     const char *revision;
     const char *domain;
     int do_allocate;
{
  char *filename = NULL;
  struct loaded_domain *last = NULL;
  struct loaded_domain *retval;
  char *cp;
  size_t entries;
  int cnt;


  /* Process the current entry described by the MASK only when it is
     valid.  Because the mask can have in the first call bits from
     both syntaces set this is necessary to prevent constructing
     illegal local names.  */
  /* FIXME: Rewrite because test is necessary only in first round.  */
  if ((mask & CEN_SPECIFIC) == 0 || (mask & XPG_SPECIFIC) == 0
      || ((mask & XPG_CODESET) != 0 && (mask & XPG_NORM_CODESET) != 0))
    {
      /* Allocate room for the full file name.  */
      filename = (char *) malloc (strlen (dirname) + 1
				  + strlen (language)
				  + ((mask & TERRITORY) != 0
				     ? strlen (territory) + 1 : 0)
				  + ((mask & XPG_CODESET) != 0
				     ? strlen (codeset) + 1 : 0)
				  + ((mask & XPG_NORM_CODESET) != 0
				     ? strlen (normalized_codeset) + 1 : 0)
				  + ((mask & XPG_MODIFIER) != 0 ?
				     strlen (modifier) + 1 : 0)
				  + ((mask & CEN_SPECIAL) != 0
				     ? strlen (special) + 1 : 0)
				  + ((mask & CEN_SPONSOR) != 0
				     ? strlen (sponsor) + 1 : 0)
				  + ((mask & CEN_REVISION) != 0
				     ? strlen (revision) + 1 : 0) + 1
				  + strlen (domain) + 1);

      if (filename == NULL)
	return NULL;

      retval = NULL;
      last = NULL;

      /* Construct file name.  */
      cp = stpcpy (filename, dirname);
      *cp++ = '/';
      cp = stpcpy (cp, language);

      if ((mask & TERRITORY) != 0)
	{
	  *cp++ = '_';
	  cp = stpcpy (cp, territory);
	}
      if ((mask & XPG_CODESET) != 0)
	{
	  *cp++ = '.';
	  cp = stpcpy (cp, codeset);
	}
      if ((mask & XPG_NORM_CODESET) != 0)
	{
	  *cp++ = '.';
	  cp = stpcpy (cp, normalized_codeset);
	}
      if ((mask & (XPG_MODIFIER | CEN_AUDIENCE)) != 0)
	{
	  /* This component can be part of both syntaces but has different
	     leading characters.  For CEN we use `+', else `@'.  */
	  *cp++ = (mask & CEN_AUDIENCE) != 0 ? '+' : '@';
	  cp = stpcpy (cp, modifier);
	}
      if ((mask & CEN_SPECIAL) != 0)
	{
	  *cp++ = '+';
	  cp = stpcpy (cp, special);
	}
      if ((mask & CEN_SPONSOR) != 0)
	{
	  *cp++ = ',';
	  cp = stpcpy (cp, sponsor);
	}
      if ((mask & CEN_REVISION) != 0)
	{
	  *cp++ = '_';
	  cp = stpcpy (cp, revision);
	}

      *cp++ = '/';
      stpcpy (cp, domain);

      /* Look in list of already loaded domains whether it is already
	 available.  */
      last = NULL;
      for (retval = _nl_loaded_domains; retval != NULL; retval = retval->next)
	if (retval->filename != NULL)
	  {
	    int compare = strcmp (retval->filename, filename);
	    if (compare == 0)
	      /* We found it!  */
	      break;
	    if (compare < 0)
	      {
		/* It's not in the list.  */
		retval = NULL;
		break;
	      }

	    last = retval;
	  }

      if (retval != NULL || do_allocate == 0)
	{
	  free (filename);
	  return retval;
	}
    }

  retval = (struct loaded_domain *) malloc (sizeof (*retval));
  if (retval == NULL)
    return NULL;

  retval->filename = filename;
  retval->decided = 0;

  if (last == NULL)
    {
      retval->next = _nl_loaded_domains;
      _nl_loaded_domains = retval;
    }
  else
    {
      retval->next = last->next;
      last->next = retval;
    }

  entries = 0;
  for (cnt = 254; cnt >= 0; --cnt)
    if (cnt < mask && (cnt & ~mask) == 0
	&& ((cnt & CEN_SPECIFIC) == 0 || (cnt & XPG_SPECIFIC) == 0)
	&& ((cnt & XPG_CODESET) == 0 || (cnt & XPG_NORM_CODESET) == 0))
      retval->successor[entries++] = make_entry_rec (dirname, cnt,
						     language, territory,
						     codeset,
						     normalized_codeset,
						     modifier, special,
						     sponsor, revision,
						     domain, 1);
  retval->successor[entries] = NULL;

  return retval;
}


static const char *
normalize_codeset (codeset)
     const char *codeset;
{
  int len = 0;
  int only_digit = 1;
  const char *cp;
  char *retval;
  char *wp;

  for (cp = codeset; cp[0] != '\0'; ++cp)
    if (isalnum (cp[0]))
      {
	++len;

	if (isalpha (cp[0]))
	  only_digit = 0;
      }

  retval = (char *) malloc ((only_digit ? 3 : 0) + len + 1);

  if (retval != NULL)
    {
      if (only_digit)
	wp = stpcpy (retval, "ISO");
      else
	wp = retval;

      for (cp = codeset; cp[0] != '\0'; ++cp)
	if (isalpha (cp[0]))
	  *wp++ = toupper (cp[0]);
	else if (isdigit (cp[0]))
	  *wp++ = cp[0];

      *wp = '\0';
    }

  return (const char *) retval;
}


/* @@ begin of epilog @@ */

/* We don't want libintl.a to depend on any other library.  So we
   avoid the non-standard function stpcpy.  In GNU C Library this
   function is available, though.  Also allow the symbol HAVE_STPCPY
   to be defined.  */
#if !_LIBC && !HAVE_STPCPY
static char *
stpcpy__ (dest, src)
     char *dest;
     const char *src;
{
  while ((*dest++ = *src++) != '\0')
    /* Do nothing. */ ;
  return dest - 1;
}
#endif