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3185942a | 1 | /* bindtextdom.c - Implementation of the bindtextdomain(3) function */ |
b80f6443 | 2 | |
3185942a | 3 | /* Copyright (C) 1995-1998, 2000, 2001, 2002, 2005-2009 Free Software Foundation, Inc. |
b80f6443 | 4 | |
3185942a JA |
5 | This file is part of GNU Bash. |
6 | ||
7 | Bash is free software: you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, | |
b80f6443 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
3185942a JA |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. | |
b80f6443 | 16 | |
3185942a JA |
17 | You should have received a copy of the GNU General Public License |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
b80f6443 JA |
20 | |
21 | #ifdef HAVE_CONFIG_H | |
22 | # include <config.h> | |
23 | #endif | |
24 | ||
25 | #include <stddef.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | ||
29 | #ifdef _LIBC | |
30 | # include <libintl.h> | |
31 | #else | |
32 | # include "libgnuintl.h" | |
33 | #endif | |
34 | #include "gettextP.h" | |
35 | ||
36 | #ifdef _LIBC | |
37 | /* We have to handle multi-threaded applications. */ | |
38 | # include <bits/libc-lock.h> | |
39 | #else | |
40 | /* Provide dummy implementation if this is outside glibc. */ | |
41 | # define __libc_rwlock_define(CLASS, NAME) | |
42 | # define __libc_rwlock_wrlock(NAME) | |
43 | # define __libc_rwlock_unlock(NAME) | |
44 | #endif | |
45 | ||
46 | /* The internal variables in the standalone libintl.a must have different | |
47 | names than the internal variables in GNU libc, otherwise programs | |
48 | using libintl.a cannot be linked statically. */ | |
49 | #if !defined _LIBC | |
50 | # define _nl_default_dirname libintl_nl_default_dirname | |
51 | # define _nl_domain_bindings libintl_nl_domain_bindings | |
52 | #endif | |
53 | ||
54 | /* Some compilers, like SunOS4 cc, don't have offsetof in <stddef.h>. */ | |
55 | #ifndef offsetof | |
56 | # define offsetof(type,ident) ((size_t)&(((type*)0)->ident)) | |
57 | #endif | |
58 | ||
59 | /* @@ end of prolog @@ */ | |
60 | ||
61 | /* Contains the default location of the message catalogs. */ | |
62 | extern const char _nl_default_dirname[]; | |
63 | #ifdef _LIBC | |
64 | extern const char _nl_default_dirname_internal[] attribute_hidden; | |
65 | #else | |
66 | # define INTUSE(name) name | |
67 | #endif | |
68 | ||
69 | /* List with bindings of specific domains. */ | |
70 | extern struct binding *_nl_domain_bindings; | |
71 | ||
72 | /* Lock variable to protect the global data in the gettext implementation. */ | |
73 | __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) | |
74 | ||
75 | ||
76 | /* Names for the libintl functions are a problem. They must not clash | |
77 | with existing names and they should follow ANSI C. But this source | |
78 | code is also used in GNU C Library where the names have a __ | |
79 | prefix. So we have to make a difference here. */ | |
80 | #ifdef _LIBC | |
81 | # define BINDTEXTDOMAIN __bindtextdomain | |
82 | # define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset | |
83 | # ifndef strdup | |
84 | # define strdup(str) __strdup (str) | |
85 | # endif | |
86 | #else | |
87 | # define BINDTEXTDOMAIN libintl_bindtextdomain | |
88 | # define BIND_TEXTDOMAIN_CODESET libintl_bind_textdomain_codeset | |
89 | #endif | |
90 | ||
91 | /* Prototypes for local functions. */ | |
92 | static void set_binding_values PARAMS ((const char *domainname, | |
93 | const char **dirnamep, | |
94 | const char **codesetp)); | |
95 | ||
96 | /* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP | |
97 | to be used for the DOMAINNAME message catalog. | |
98 | If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not | |
99 | modified, only the current value is returned. | |
100 | If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither | |
101 | modified nor returned. */ | |
102 | static void | |
103 | set_binding_values (domainname, dirnamep, codesetp) | |
104 | const char *domainname; | |
105 | const char **dirnamep; | |
106 | const char **codesetp; | |
107 | { | |
108 | struct binding *binding; | |
109 | int modified; | |
110 | ||
111 | /* Some sanity checks. */ | |
112 | if (domainname == NULL || domainname[0] == '\0') | |
113 | { | |
114 | if (dirnamep) | |
115 | *dirnamep = NULL; | |
116 | if (codesetp) | |
117 | *codesetp = NULL; | |
118 | return; | |
119 | } | |
120 | ||
121 | __libc_rwlock_wrlock (_nl_state_lock); | |
122 | ||
123 | modified = 0; | |
124 | ||
125 | for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next) | |
126 | { | |
127 | int compare = strcmp (domainname, binding->domainname); | |
128 | if (compare == 0) | |
129 | /* We found it! */ | |
130 | break; | |
131 | if (compare < 0) | |
132 | { | |
133 | /* It is not in the list. */ | |
134 | binding = NULL; | |
135 | break; | |
136 | } | |
137 | } | |
138 | ||
139 | if (binding != NULL) | |
140 | { | |
141 | if (dirnamep) | |
142 | { | |
143 | const char *dirname = *dirnamep; | |
144 | ||
145 | if (dirname == NULL) | |
146 | /* The current binding has be to returned. */ | |
147 | *dirnamep = binding->dirname; | |
148 | else | |
149 | { | |
150 | /* The domain is already bound. If the new value and the old | |
151 | one are equal we simply do nothing. Otherwise replace the | |
152 | old binding. */ | |
153 | char *result = binding->dirname; | |
154 | if (strcmp (dirname, result) != 0) | |
155 | { | |
156 | if (strcmp (dirname, INTUSE(_nl_default_dirname)) == 0) | |
157 | result = (char *) INTUSE(_nl_default_dirname); | |
158 | else | |
159 | { | |
160 | #if defined _LIBC || defined HAVE_STRDUP | |
161 | result = strdup (dirname); | |
162 | #else | |
163 | size_t len = strlen (dirname) + 1; | |
164 | result = (char *) malloc (len); | |
165 | if (__builtin_expect (result != NULL, 1)) | |
166 | memcpy (result, dirname, len); | |
167 | #endif | |
168 | } | |
169 | ||
170 | if (__builtin_expect (result != NULL, 1)) | |
171 | { | |
172 | if (binding->dirname != INTUSE(_nl_default_dirname)) | |
173 | free (binding->dirname); | |
174 | ||
175 | binding->dirname = result; | |
176 | modified = 1; | |
177 | } | |
178 | } | |
179 | *dirnamep = result; | |
180 | } | |
181 | } | |
182 | ||
183 | if (codesetp) | |
184 | { | |
185 | const char *codeset = *codesetp; | |
186 | ||
187 | if (codeset == NULL) | |
188 | /* The current binding has be to returned. */ | |
189 | *codesetp = binding->codeset; | |
190 | else | |
191 | { | |
192 | /* The domain is already bound. If the new value and the old | |
193 | one are equal we simply do nothing. Otherwise replace the | |
194 | old binding. */ | |
195 | char *result = binding->codeset; | |
196 | if (result == NULL || strcmp (codeset, result) != 0) | |
197 | { | |
198 | #if defined _LIBC || defined HAVE_STRDUP | |
199 | result = strdup (codeset); | |
200 | #else | |
201 | size_t len = strlen (codeset) + 1; | |
202 | result = (char *) malloc (len); | |
203 | if (__builtin_expect (result != NULL, 1)) | |
204 | memcpy (result, codeset, len); | |
205 | #endif | |
206 | ||
207 | if (__builtin_expect (result != NULL, 1)) | |
208 | { | |
209 | if (binding->codeset != NULL) | |
210 | free (binding->codeset); | |
211 | ||
212 | binding->codeset = result; | |
213 | binding->codeset_cntr++; | |
214 | modified = 1; | |
215 | } | |
216 | } | |
217 | *codesetp = result; | |
218 | } | |
219 | } | |
220 | } | |
221 | else if ((dirnamep == NULL || *dirnamep == NULL) | |
222 | && (codesetp == NULL || *codesetp == NULL)) | |
223 | { | |
224 | /* Simply return the default values. */ | |
225 | if (dirnamep) | |
226 | *dirnamep = INTUSE(_nl_default_dirname); | |
227 | if (codesetp) | |
228 | *codesetp = NULL; | |
229 | } | |
230 | else | |
231 | { | |
232 | /* We have to create a new binding. */ | |
233 | size_t len = strlen (domainname) + 1; | |
234 | struct binding *new_binding = | |
235 | (struct binding *) malloc (offsetof (struct binding, domainname) + len); | |
236 | ||
237 | if (__builtin_expect (new_binding == NULL, 0)) | |
238 | goto failed; | |
239 | ||
240 | memcpy (new_binding->domainname, domainname, len); | |
241 | ||
242 | if (dirnamep) | |
243 | { | |
244 | const char *dirname = *dirnamep; | |
245 | ||
246 | if (dirname == NULL) | |
247 | /* The default value. */ | |
248 | dirname = INTUSE(_nl_default_dirname); | |
249 | else | |
250 | { | |
251 | if (strcmp (dirname, INTUSE(_nl_default_dirname)) == 0) | |
252 | dirname = INTUSE(_nl_default_dirname); | |
253 | else | |
254 | { | |
255 | char *result; | |
256 | #if defined _LIBC || defined HAVE_STRDUP | |
257 | result = strdup (dirname); | |
258 | if (__builtin_expect (result == NULL, 0)) | |
259 | goto failed_dirname; | |
260 | #else | |
261 | size_t len = strlen (dirname) + 1; | |
262 | result = (char *) malloc (len); | |
263 | if (__builtin_expect (result == NULL, 0)) | |
264 | goto failed_dirname; | |
265 | memcpy (result, dirname, len); | |
266 | #endif | |
267 | dirname = result; | |
268 | } | |
269 | } | |
270 | *dirnamep = dirname; | |
271 | new_binding->dirname = (char *) dirname; | |
272 | } | |
273 | else | |
274 | /* The default value. */ | |
275 | new_binding->dirname = (char *) INTUSE(_nl_default_dirname); | |
276 | ||
277 | new_binding->codeset_cntr = 0; | |
278 | ||
279 | if (codesetp) | |
280 | { | |
281 | const char *codeset = *codesetp; | |
282 | ||
283 | if (codeset != NULL) | |
284 | { | |
285 | char *result; | |
286 | ||
287 | #if defined _LIBC || defined HAVE_STRDUP | |
288 | result = strdup (codeset); | |
289 | if (__builtin_expect (result == NULL, 0)) | |
290 | goto failed_codeset; | |
291 | #else | |
292 | size_t len = strlen (codeset) + 1; | |
293 | result = (char *) malloc (len); | |
294 | if (__builtin_expect (result == NULL, 0)) | |
295 | goto failed_codeset; | |
296 | memcpy (result, codeset, len); | |
297 | #endif | |
298 | codeset = result; | |
299 | new_binding->codeset_cntr++; | |
300 | } | |
301 | *codesetp = codeset; | |
302 | new_binding->codeset = (char *) codeset; | |
303 | } | |
304 | else | |
305 | new_binding->codeset = NULL; | |
306 | ||
307 | /* Now enqueue it. */ | |
308 | if (_nl_domain_bindings == NULL | |
309 | || strcmp (domainname, _nl_domain_bindings->domainname) < 0) | |
310 | { | |
311 | new_binding->next = _nl_domain_bindings; | |
312 | _nl_domain_bindings = new_binding; | |
313 | } | |
314 | else | |
315 | { | |
316 | binding = _nl_domain_bindings; | |
317 | while (binding->next != NULL | |
318 | && strcmp (domainname, binding->next->domainname) > 0) | |
319 | binding = binding->next; | |
320 | ||
321 | new_binding->next = binding->next; | |
322 | binding->next = new_binding; | |
323 | } | |
324 | ||
325 | modified = 1; | |
326 | ||
327 | /* Here we deal with memory allocation failures. */ | |
328 | if (0) | |
329 | { | |
330 | failed_codeset: | |
331 | if (new_binding->dirname != INTUSE(_nl_default_dirname)) | |
332 | free (new_binding->dirname); | |
333 | failed_dirname: | |
334 | free (new_binding); | |
335 | failed: | |
336 | if (dirnamep) | |
337 | *dirnamep = NULL; | |
338 | if (codesetp) | |
339 | *codesetp = NULL; | |
340 | } | |
341 | } | |
342 | ||
343 | /* If we modified any binding, we flush the caches. */ | |
344 | if (modified) | |
345 | ++_nl_msg_cat_cntr; | |
346 | ||
347 | __libc_rwlock_unlock (_nl_state_lock); | |
348 | } | |
349 | ||
350 | /* Specify that the DOMAINNAME message catalog will be found | |
351 | in DIRNAME rather than in the system locale data base. */ | |
352 | char * | |
353 | BINDTEXTDOMAIN (domainname, dirname) | |
354 | const char *domainname; | |
355 | const char *dirname; | |
356 | { | |
357 | set_binding_values (domainname, &dirname, NULL); | |
358 | return (char *) dirname; | |
359 | } | |
360 | ||
361 | /* Specify the character encoding in which the messages from the | |
362 | DOMAINNAME message catalog will be returned. */ | |
363 | char * | |
364 | BIND_TEXTDOMAIN_CODESET (domainname, codeset) | |
365 | const char *domainname; | |
366 | const char *codeset; | |
367 | { | |
368 | set_binding_values (domainname, NULL, &codeset); | |
369 | return (char *) codeset; | |
370 | } | |
371 | ||
372 | #ifdef _LIBC | |
373 | /* Aliases for function names in GNU C Library. */ | |
374 | weak_alias (__bindtextdomain, bindtextdomain); | |
375 | weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset); | |
376 | #endif |