summaryrefslogtreecommitdiff
path: root/intl/bindtextdom.c
blob: c3624961a8fcd0f23caf806722c07fe9a324d656 (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
/* Implementation of the bindtextdomain(3) function
   Copyright (C) 1995-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C 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.

   The GNU C 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 the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

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

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

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

#ifdef _LIBC
/* We have to handle multi-threaded applications.  */
# include <bits/libc-lock.h>
#else
/* Provide dummy implementation if this is outside glibc.  */
# define __libc_rwlock_define(CLASS, NAME)
# define __libc_rwlock_wrlock(NAME)
# define __libc_rwlock_unlock(NAME)
#endif

/* The internal variables in the standalone libintl.a must have different
   names than the internal variables in GNU libc, otherwise programs
   using libintl.a cannot be linked statically.  */
#if !defined _LIBC
# define _nl_default_dirname libintl_nl_default_dirname
# define _nl_domain_bindings libintl_nl_domain_bindings
#endif

/* Some compilers, like SunOS4 cc, don't have offsetof in <stddef.h>.  */
#ifndef offsetof
# define offsetof(type,ident) ((size_t)&(((type*)0)->ident))
#endif

/* @@ end of prolog @@ */

/* Contains the default location of the message catalogs.  */
extern const char _nl_default_dirname[];
#ifdef _LIBC
libc_hidden_proto (_nl_default_dirname)
#endif

/* List with bindings of specific domains.  */
extern struct binding *_nl_domain_bindings;

/* Lock variable to protect the global data in the gettext implementation.  */
__libc_rwlock_define (extern, _nl_state_lock attribute_hidden)


/* Names for the libintl functions are a problem.  They must not clash
   with existing names and they should follow ANSI C.  But this source
   code is also used in GNU C Library where the names have a __
   prefix.  So we have to make a difference here.  */
#ifdef _LIBC
# define BINDTEXTDOMAIN __bindtextdomain
# define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset
# ifndef strdup
#  define strdup(str) __strdup (str)
# endif
#else
# define BINDTEXTDOMAIN libintl_bindtextdomain
# define BIND_TEXTDOMAIN_CODESET libintl_bind_textdomain_codeset
#endif

/* Prototypes for local functions.  */
static void set_binding_values PARAMS ((const char *domainname,
					const char **dirnamep,
					const char **codesetp));

/* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP
   to be used for the DOMAINNAME message catalog.
   If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not
   modified, only the current value is returned.
   If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither
   modified nor returned.  */
static void
set_binding_values (domainname, dirnamep, codesetp)
     const char *domainname;
     const char **dirnamep;
     const char **codesetp;
{
  struct binding *binding;
  int modified;

  /* Some sanity checks.  */
  if (domainname == NULL || domainname[0] == '\0')
    {
      if (dirnamep)
	*dirnamep = NULL;
      if (codesetp)
	*codesetp = NULL;
      return;
    }

  __libc_rwlock_wrlock (_nl_state_lock);

  modified = 0;

  for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next)
    {
      int compare = strcmp (domainname, binding->domainname);
      if (compare == 0)
	/* We found it!  */
	break;
      if (compare < 0)
	{
	  /* It is not in the list.  */
	  binding = NULL;
	  break;
	}
    }

  if (binding != NULL)
    {
      if (dirnamep)
	{
	  const char *dirname = *dirnamep;

	  if (dirname == NULL)
	    /* The current binding has be to returned.  */
	    *dirnamep = binding->dirname;
	  else
	    {
	      /* The domain is already bound.  If the new value and the old
		 one are equal we simply do nothing.  Otherwise replace the
		 old binding.  */
	      char *result = binding->dirname;
	      if (strcmp (dirname, result) != 0)
		{
		  if (strcmp (dirname, _nl_default_dirname) == 0)
		    result = (char *) _nl_default_dirname;
		  else
		    {
#if defined _LIBC || defined HAVE_STRDUP
		      result = strdup (dirname);
#else
		      size_t len = strlen (dirname) + 1;
		      result = (char *) malloc (len);
		      if (__glibc_likely (result != NULL))
			memcpy (result, dirname, len);
#endif
		    }

		  if (__glibc_likely (result != NULL))
		    {
		      if (binding->dirname != _nl_default_dirname)
			free (binding->dirname);

		      binding->dirname = result;
		      modified = 1;
		    }
		}
	      *dirnamep = result;
	    }
	}

      if (codesetp)
	{
	  const char *codeset = *codesetp;

	  if (codeset == NULL)
	    /* The current binding has be to returned.  */
	    *codesetp = binding->codeset;
	  else
	    {
	      /* The domain is already bound.  If the new value and the old
		 one are equal we simply do nothing.  Otherwise replace the
		 old binding.  */
	      char *result = binding->codeset;
	      if (result == NULL || strcmp (codeset, result) != 0)
		{
#if defined _LIBC || defined HAVE_STRDUP
		  result = strdup (codeset);
#else
		  size_t len = strlen (codeset) + 1;
		  result = (char *) malloc (len);
		  if (__glibc_likely (result != NULL))
		    memcpy (result, codeset, len);
#endif

		  if (__glibc_likely (result != NULL))
		    {
		      free (binding->codeset);

		      binding->codeset = result;
		      modified = 1;
		    }
		}
	      *codesetp = result;
	    }
	}
    }
  else if ((dirnamep == NULL || *dirnamep == NULL)
	   && (codesetp == NULL || *codesetp == NULL))
    {
      /* Simply return the default values.  */
      if (dirnamep)
	*dirnamep = _nl_default_dirname;
      if (codesetp)
	*codesetp = NULL;
    }
  else
    {
      /* We have to create a new binding.  */
      size_t len = strlen (domainname) + 1;
      struct binding *new_binding =
	(struct binding *) malloc (offsetof (struct binding, domainname) + len);

      if (__glibc_unlikely (new_binding == NULL))
	goto failed;

      memcpy (new_binding->domainname, domainname, len);

      if (dirnamep)
	{
	  const char *dirname = *dirnamep;

	  if (dirname == NULL)
	    /* The default value.  */
	    dirname = _nl_default_dirname;
	  else
	    {
	      if (strcmp (dirname, _nl_default_dirname) == 0)
		dirname = _nl_default_dirname;
	      else
		{
		  char *result;
#if defined _LIBC || defined HAVE_STRDUP
		  result = strdup (dirname);
		  if (__glibc_unlikely (result == NULL))
		    goto failed_dirname;
#else
		  size_t len = strlen (dirname) + 1;
		  result = (char *) malloc (len);
		  if (__glibc_unlikely (result == NULL))
		    goto failed_dirname;
		  memcpy (result, dirname, len);
#endif
		  dirname = result;
		}
	    }
	  *dirnamep = dirname;
	  new_binding->dirname = (char *) dirname;
	}
      else
	/* The default value.  */
	new_binding->dirname = (char *) _nl_default_dirname;

      if (codesetp)
	{
	  const char *codeset = *codesetp;

	  if (codeset != NULL)
	    {
	      char *result;

#if defined _LIBC || defined HAVE_STRDUP
	      result = strdup (codeset);
	      if (__glibc_unlikely (result == NULL))
		goto failed_codeset;
#else
	      size_t len = strlen (codeset) + 1;
	      result = (char *) malloc (len);
	      if (__glibc_unlikely (result == NULL))
		goto failed_codeset;
	      memcpy (result, codeset, len);
#endif
	      codeset = result;
	    }
	  *codesetp = codeset;
	  new_binding->codeset = (char *) codeset;
	}
      else
	new_binding->codeset = NULL;

      /* Now enqueue it.  */
      if (_nl_domain_bindings == NULL
	  || strcmp (domainname, _nl_domain_bindings->domainname) < 0)
	{
	  new_binding->next = _nl_domain_bindings;
	  _nl_domain_bindings = new_binding;
	}
      else
	{
	  binding = _nl_domain_bindings;
	  while (binding->next != NULL
		 && strcmp (domainname, binding->next->domainname) > 0)
	    binding = binding->next;

	  new_binding->next = binding->next;
	  binding->next = new_binding;
	}

      modified = 1;

      /* Here we deal with memory allocation failures.  */
      if (0)
	{
	failed_codeset:
	  if (new_binding->dirname != _nl_default_dirname)
	    free (new_binding->dirname);
	failed_dirname:
	  free (new_binding);
	failed:
	  if (dirnamep)
	    *dirnamep = NULL;
	  if (codesetp)
	    *codesetp = NULL;
	}
    }

  /* If we modified any binding, we flush the caches.  */
  if (modified)
    ++_nl_msg_cat_cntr;

  __libc_rwlock_unlock (_nl_state_lock);
}

/* Specify that the DOMAINNAME message catalog will be found
   in DIRNAME rather than in the system locale data base.  */
char *
BINDTEXTDOMAIN (domainname, dirname)
     const char *domainname;
     const char *dirname;
{
  set_binding_values (domainname, &dirname, NULL);
  return (char *) dirname;
}

/* Specify the character encoding in which the messages from the
   DOMAINNAME message catalog will be returned.  */
char *
BIND_TEXTDOMAIN_CODESET (domainname, codeset)
     const char *domainname;
     const char *codeset;
{
  set_binding_values (domainname, NULL, &codeset);
  return (char *) codeset;
}

#ifdef _LIBC
/* Aliases for function names in GNU C Library.  */
weak_alias (__bindtextdomain, bindtextdomain);
weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset);
#endif