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1 | /* Implementation of the bindtextdomain(3) function |
2 | Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU Library General Public License as published | |
6 | by the Free Software Foundation; either version 2, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
17 | USA. */ | |
18 | ||
19 | #ifdef HAVE_CONFIG_H | |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
23 | #include <stddef.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
27 | #ifdef _LIBC | |
28 | # include <libintl.h> | |
29 | #else | |
30 | # include "libgnuintl.h" | |
31 | #endif | |
32 | #include "gettextP.h" | |
33 | ||
34 | #ifdef _LIBC | |
35 | /* We have to handle multi-threaded applications. */ | |
36 | # include <bits/libc-lock.h> | |
37 | #else | |
38 | /* Provide dummy implementation if this is outside glibc. */ | |
39 | # define __libc_rwlock_define(CLASS, NAME) | |
40 | # define __libc_rwlock_wrlock(NAME) | |
41 | # define __libc_rwlock_unlock(NAME) | |
42 | #endif | |
43 | ||
44 | /* The internal variables in the standalone libintl.a must have different | |
45 | names than the internal variables in GNU libc, otherwise programs | |
46 | using libintl.a cannot be linked statically. */ | |
47 | #if !defined _LIBC | |
48 | # define _nl_default_dirname libintl_nl_default_dirname | |
49 | # define _nl_domain_bindings libintl_nl_domain_bindings | |
50 | #endif | |
51 | ||
52 | /* Some compilers, like SunOS4 cc, don't have offsetof in <stddef.h>. */ | |
53 | #ifndef offsetof | |
54 | # define offsetof(type,ident) ((size_t)&(((type*)0)->ident)) | |
55 | #endif | |
56 | ||
57 | /* @@ end of prolog @@ */ | |
58 | ||
59 | /* Contains the default location of the message catalogs. */ | |
60 | extern const char _nl_default_dirname[]; | |
61 | #ifdef _LIBC | |
62 | extern const char _nl_default_dirname_internal[] attribute_hidden; | |
63 | #else | |
64 | # define INTUSE(name) name | |
65 | #endif | |
66 | ||
67 | /* List with bindings of specific domains. */ | |
68 | extern struct binding *_nl_domain_bindings; | |
69 | ||
70 | /* Lock variable to protect the global data in the gettext implementation. */ | |
71 | __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) | |
72 | ||
73 | ||
74 | /* Names for the libintl functions are a problem. They must not clash | |
75 | with existing names and they should follow ANSI C. But this source | |
76 | code is also used in GNU C Library where the names have a __ | |
77 | prefix. So we have to make a difference here. */ | |
78 | #ifdef _LIBC | |
79 | # define BINDTEXTDOMAIN __bindtextdomain | |
80 | # define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset | |
81 | # ifndef strdup | |
82 | # define strdup(str) __strdup (str) | |
83 | # endif | |
84 | #else | |
85 | # define BINDTEXTDOMAIN libintl_bindtextdomain | |
86 | # define BIND_TEXTDOMAIN_CODESET libintl_bind_textdomain_codeset | |
87 | #endif | |
88 | ||
89 | /* Prototypes for local functions. */ | |
90 | static void set_binding_values PARAMS ((const char *domainname, | |
91 | const char **dirnamep, | |
92 | const char **codesetp)); | |
93 | ||
94 | /* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP | |
95 | to be used for the DOMAINNAME message catalog. | |
96 | If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not | |
97 | modified, only the current value is returned. | |
98 | If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither | |
99 | modified nor returned. */ | |
100 | static void | |
101 | set_binding_values (domainname, dirnamep, codesetp) | |
102 | const char *domainname; | |
103 | const char **dirnamep; | |
104 | const char **codesetp; | |
105 | { | |
106 | struct binding *binding; | |
107 | int modified; | |
108 | ||
109 | /* Some sanity checks. */ | |
110 | if (domainname == NULL || domainname[0] == '\0') | |
111 | { | |
112 | if (dirnamep) | |
113 | *dirnamep = NULL; | |
114 | if (codesetp) | |
115 | *codesetp = NULL; | |
116 | return; | |
117 | } | |
118 | ||
119 | __libc_rwlock_wrlock (_nl_state_lock); | |
120 | ||
121 | modified = 0; | |
122 | ||
123 | for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next) | |
124 | { | |
125 | int compare = strcmp (domainname, binding->domainname); | |
126 | if (compare == 0) | |
127 | /* We found it! */ | |
128 | break; | |
129 | if (compare < 0) | |
130 | { | |
131 | /* It is not in the list. */ | |
132 | binding = NULL; | |
133 | break; | |
134 | } | |
135 | } | |
136 | ||
137 | if (binding != NULL) | |
138 | { | |
139 | if (dirnamep) | |
140 | { | |
141 | const char *dirname = *dirnamep; | |
142 | ||
143 | if (dirname == NULL) | |
144 | /* The current binding has be to returned. */ | |
145 | *dirnamep = binding->dirname; | |
146 | else | |
147 | { | |
148 | /* The domain is already bound. If the new value and the old | |
149 | one are equal we simply do nothing. Otherwise replace the | |
150 | old binding. */ | |
151 | char *result = binding->dirname; | |
152 | if (strcmp (dirname, result) != 0) | |
153 | { | |
154 | if (strcmp (dirname, INTUSE(_nl_default_dirname)) == 0) | |
155 | result = (char *) INTUSE(_nl_default_dirname); | |
156 | else | |
157 | { | |
158 | #if defined _LIBC || defined HAVE_STRDUP | |
159 | result = strdup (dirname); | |
160 | #else | |
161 | size_t len = strlen (dirname) + 1; | |
162 | result = (char *) malloc (len); | |
163 | if (__builtin_expect (result != NULL, 1)) | |
164 | memcpy (result, dirname, len); | |
165 | #endif | |
166 | } | |
167 | ||
168 | if (__builtin_expect (result != NULL, 1)) | |
169 | { | |
170 | if (binding->dirname != INTUSE(_nl_default_dirname)) | |
171 | free (binding->dirname); | |
172 | ||
173 | binding->dirname = result; | |
174 | modified = 1; | |
175 | } | |
176 | } | |
177 | *dirnamep = result; | |
178 | } | |
179 | } | |
180 | ||
181 | if (codesetp) | |
182 | { | |
183 | const char *codeset = *codesetp; | |
184 | ||
185 | if (codeset == NULL) | |
186 | /* The current binding has be to returned. */ | |
187 | *codesetp = binding->codeset; | |
188 | else | |
189 | { | |
190 | /* The domain is already bound. If the new value and the old | |
191 | one are equal we simply do nothing. Otherwise replace the | |
192 | old binding. */ | |
193 | char *result = binding->codeset; | |
194 | if (result == NULL || strcmp (codeset, result) != 0) | |
195 | { | |
196 | #if defined _LIBC || defined HAVE_STRDUP | |
197 | result = strdup (codeset); | |
198 | #else | |
199 | size_t len = strlen (codeset) + 1; | |
200 | result = (char *) malloc (len); | |
201 | if (__builtin_expect (result != NULL, 1)) | |
202 | memcpy (result, codeset, len); | |
203 | #endif | |
204 | ||
205 | if (__builtin_expect (result != NULL, 1)) | |
206 | { | |
207 | if (binding->codeset != NULL) | |
208 | free (binding->codeset); | |
209 | ||
210 | binding->codeset = result; | |
211 | binding->codeset_cntr++; | |
212 | modified = 1; | |
213 | } | |
214 | } | |
215 | *codesetp = result; | |
216 | } | |
217 | } | |
218 | } | |
219 | else if ((dirnamep == NULL || *dirnamep == NULL) | |
220 | && (codesetp == NULL || *codesetp == NULL)) | |
221 | { | |
222 | /* Simply return the default values. */ | |
223 | if (dirnamep) | |
224 | *dirnamep = INTUSE(_nl_default_dirname); | |
225 | if (codesetp) | |
226 | *codesetp = NULL; | |
227 | } | |
228 | else | |
229 | { | |
230 | /* We have to create a new binding. */ | |
231 | size_t len = strlen (domainname) + 1; | |
232 | struct binding *new_binding = | |
233 | (struct binding *) malloc (offsetof (struct binding, domainname) + len); | |
234 | ||
235 | if (__builtin_expect (new_binding == NULL, 0)) | |
236 | goto failed; | |
237 | ||
238 | memcpy (new_binding->domainname, domainname, len); | |
239 | ||
240 | if (dirnamep) | |
241 | { | |
242 | const char *dirname = *dirnamep; | |
243 | ||
244 | if (dirname == NULL) | |
245 | /* The default value. */ | |
246 | dirname = INTUSE(_nl_default_dirname); | |
247 | else | |
248 | { | |
249 | if (strcmp (dirname, INTUSE(_nl_default_dirname)) == 0) | |
250 | dirname = INTUSE(_nl_default_dirname); | |
251 | else | |
252 | { | |
253 | char *result; | |
254 | #if defined _LIBC || defined HAVE_STRDUP | |
255 | result = strdup (dirname); | |
256 | if (__builtin_expect (result == NULL, 0)) | |
257 | goto failed_dirname; | |
258 | #else | |
259 | size_t len = strlen (dirname) + 1; | |
260 | result = (char *) malloc (len); | |
261 | if (__builtin_expect (result == NULL, 0)) | |
262 | goto failed_dirname; | |
263 | memcpy (result, dirname, len); | |
264 | #endif | |
265 | dirname = result; | |
266 | } | |
267 | } | |
268 | *dirnamep = dirname; | |
269 | new_binding->dirname = (char *) dirname; | |
270 | } | |
271 | else | |
272 | /* The default value. */ | |
273 | new_binding->dirname = (char *) INTUSE(_nl_default_dirname); | |
274 | ||
275 | new_binding->codeset_cntr = 0; | |
276 | ||
277 | if (codesetp) | |
278 | { | |
279 | const char *codeset = *codesetp; | |
280 | ||
281 | if (codeset != NULL) | |
282 | { | |
283 | char *result; | |
284 | ||
285 | #if defined _LIBC || defined HAVE_STRDUP | |
286 | result = strdup (codeset); | |
287 | if (__builtin_expect (result == NULL, 0)) | |
288 | goto failed_codeset; | |
289 | #else | |
290 | size_t len = strlen (codeset) + 1; | |
291 | result = (char *) malloc (len); | |
292 | if (__builtin_expect (result == NULL, 0)) | |
293 | goto failed_codeset; | |
294 | memcpy (result, codeset, len); | |
295 | #endif | |
296 | codeset = result; | |
297 | new_binding->codeset_cntr++; | |
298 | } | |
299 | *codesetp = codeset; | |
300 | new_binding->codeset = (char *) codeset; | |
301 | } | |
302 | else | |
303 | new_binding->codeset = NULL; | |
304 | ||
305 | /* Now enqueue it. */ | |
306 | if (_nl_domain_bindings == NULL | |
307 | || strcmp (domainname, _nl_domain_bindings->domainname) < 0) | |
308 | { | |
309 | new_binding->next = _nl_domain_bindings; | |
310 | _nl_domain_bindings = new_binding; | |
311 | } | |
312 | else | |
313 | { | |
314 | binding = _nl_domain_bindings; | |
315 | while (binding->next != NULL | |
316 | && strcmp (domainname, binding->next->domainname) > 0) | |
317 | binding = binding->next; | |
318 | ||
319 | new_binding->next = binding->next; | |
320 | binding->next = new_binding; | |
321 | } | |
322 | ||
323 | modified = 1; | |
324 | ||
325 | /* Here we deal with memory allocation failures. */ | |
326 | if (0) | |
327 | { | |
328 | failed_codeset: | |
329 | if (new_binding->dirname != INTUSE(_nl_default_dirname)) | |
330 | free (new_binding->dirname); | |
331 | failed_dirname: | |
332 | free (new_binding); | |
333 | failed: | |
334 | if (dirnamep) | |
335 | *dirnamep = NULL; | |
336 | if (codesetp) | |
337 | *codesetp = NULL; | |
338 | } | |
339 | } | |
340 | ||
341 | /* If we modified any binding, we flush the caches. */ | |
342 | if (modified) | |
343 | ++_nl_msg_cat_cntr; | |
344 | ||
345 | __libc_rwlock_unlock (_nl_state_lock); | |
346 | } | |
347 | ||
348 | /* Specify that the DOMAINNAME message catalog will be found | |
349 | in DIRNAME rather than in the system locale data base. */ | |
350 | char * | |
351 | BINDTEXTDOMAIN (domainname, dirname) | |
352 | const char *domainname; | |
353 | const char *dirname; | |
354 | { | |
355 | set_binding_values (domainname, &dirname, NULL); | |
356 | return (char *) dirname; | |
357 | } | |
358 | ||
359 | /* Specify the character encoding in which the messages from the | |
360 | DOMAINNAME message catalog will be returned. */ | |
361 | char * | |
362 | BIND_TEXTDOMAIN_CODESET (domainname, codeset) | |
363 | const char *domainname; | |
364 | const char *codeset; | |
365 | { | |
366 | set_binding_values (domainname, NULL, &codeset); | |
367 | return (char *) codeset; | |
368 | } | |
369 | ||
370 | #ifdef _LIBC | |
371 | /* Aliases for function names in GNU C Library. */ | |
372 | weak_alias (__bindtextdomain, bindtextdomain); | |
373 | weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset); | |
374 | #endif |