Commit | Line | Data |
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252b5132 | 1 | /* Implementation of the bindtextdomain(3) function |
bf070c84 | 2 | Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc. |
252b5132 | 3 | |
bf070c84 SE |
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) | |
252b5132 RH |
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 | |
bf070c84 SE |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Library General Public License for more details. | |
252b5132 | 13 | |
bf070c84 SE |
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, | |
17 | USA. */ | |
252b5132 RH |
18 | |
19 | #ifdef HAVE_CONFIG_H | |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
bf070c84 SE |
23 | #include <stddef.h> |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
252b5132 | 26 | |
bf070c84 SE |
27 | #ifdef _LIBC |
28 | # include <libintl.h> | |
252b5132 | 29 | #else |
bf070c84 | 30 | # include "libgnuintl.h" |
252b5132 | 31 | #endif |
bf070c84 | 32 | #include "gettextP.h" |
252b5132 RH |
33 | |
34 | #ifdef _LIBC | |
bf070c84 SE |
35 | /* We have to handle multi-threaded applications. */ |
36 | # include <bits/libc-lock.h> | |
252b5132 | 37 | #else |
bf070c84 SE |
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)) | |
252b5132 | 55 | #endif |
252b5132 RH |
56 | |
57 | /* @@ end of prolog @@ */ | |
58 | ||
59 | /* Contains the default location of the message catalogs. */ | |
60 | extern const char _nl_default_dirname[]; | |
bf070c84 SE |
61 | #ifdef _LIBC |
62 | extern const char _nl_default_dirname_internal[] attribute_hidden; | |
63 | #else | |
64 | # define INTUSE(name) name | |
65 | #endif | |
252b5132 RH |
66 | |
67 | /* List with bindings of specific domains. */ | |
68 | extern struct binding *_nl_domain_bindings; | |
69 | ||
bf070c84 SE |
70 | /* Lock variable to protect the global data in the gettext implementation. */ |
71 | __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) | |
72 | ||
252b5132 RH |
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 | |
bf070c84 | 80 | # define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset |
1491f078 BE |
81 | # ifndef strdup |
82 | # define strdup(str) __strdup (str) | |
83 | # endif | |
252b5132 | 84 | #else |
bf070c84 SE |
85 | # define BINDTEXTDOMAIN libintl_bindtextdomain |
86 | # define BIND_TEXTDOMAIN_CODESET libintl_bind_textdomain_codeset | |
252b5132 RH |
87 | #endif |
88 | ||
bf070c84 SE |
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) | |
252b5132 | 102 | const char *domainname; |
bf070c84 SE |
103 | const char **dirnamep; |
104 | const char **codesetp; | |
252b5132 RH |
105 | { |
106 | struct binding *binding; | |
bf070c84 | 107 | int modified; |
252b5132 RH |
108 | |
109 | /* Some sanity checks. */ | |
110 | if (domainname == NULL || domainname[0] == '\0') | |
bf070c84 SE |
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; | |
252b5132 RH |
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 | ||
252b5132 RH |
137 | if (binding != NULL) |
138 | { | |
bf070c84 | 139 | if (dirnamep) |
252b5132 | 140 | { |
bf070c84 | 141 | const char *dirname = *dirnamep; |
252b5132 | 142 | |
bf070c84 SE |
143 | if (dirname == NULL) |
144 | /* The current binding has be to returned. */ | |
145 | *dirnamep = binding->dirname; | |
252b5132 RH |
146 | else |
147 | { | |
bf070c84 SE |
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 | { | |
252b5132 | 158 | #if defined _LIBC || defined HAVE_STRDUP |
bf070c84 | 159 | result = strdup (dirname); |
252b5132 | 160 | #else |
bf070c84 SE |
161 | size_t len = strlen (dirname) + 1; |
162 | result = (char *) malloc (len); | |
163 | if (__builtin_expect (result != NULL, 1)) | |
164 | memcpy (result, dirname, len); | |
252b5132 | 165 | #endif |
bf070c84 SE |
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; | |
252b5132 | 178 | } |
bf070c84 SE |
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 | |
252b5132 | 204 | |
bf070c84 SE |
205 | if (__builtin_expect (result != NULL, 1)) |
206 | { | |
207 | if (binding->codeset != NULL) | |
208 | free (binding->codeset); | |
252b5132 | 209 | |
bf070c84 SE |
210 | binding->codeset = result; |
211 | binding->codeset_cntr++; | |
212 | modified = 1; | |
213 | } | |
214 | } | |
215 | *codesetp = result; | |
216 | } | |
252b5132 RH |
217 | } |
218 | } | |
bf070c84 SE |
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 | } | |
252b5132 RH |
228 | else |
229 | { | |
230 | /* We have to create a new binding. */ | |
bf070c84 | 231 | size_t len = strlen (domainname) + 1; |
252b5132 | 232 | struct binding *new_binding = |
bf070c84 SE |
233 | (struct binding *) malloc (offsetof (struct binding, domainname) + len); |
234 | ||
235 | if (__builtin_expect (new_binding == NULL, 0)) | |
236 | goto failed; | |
252b5132 | 237 | |
bf070c84 SE |
238 | memcpy (new_binding->domainname, domainname, len); |
239 | ||
240 | if (dirnamep) | |
241 | { | |
242 | const char *dirname = *dirnamep; | |
252b5132 | 243 | |
bf070c84 SE |
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; | |
252b5132 | 254 | #if defined _LIBC || defined HAVE_STRDUP |
bf070c84 SE |
255 | result = strdup (dirname); |
256 | if (__builtin_expect (result == NULL, 0)) | |
257 | goto failed_dirname; | |
252b5132 | 258 | #else |
bf070c84 SE |
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); | |
252b5132 | 264 | #endif |
bf070c84 SE |
265 | dirname = result; |
266 | } | |
267 | } | |
268 | *dirnamep = dirname; | |
269 | new_binding->dirname = (char *) dirname; | |
270 | } | |
252b5132 | 271 | else |
bf070c84 SE |
272 | /* The default value. */ |
273 | new_binding->dirname = (char *) INTUSE(_nl_default_dirname); | |
274 | ||
275 | new_binding->codeset_cntr = 0; | |
276 | ||
277 | if (codesetp) | |
252b5132 | 278 | { |
bf070c84 SE |
279 | const char *codeset = *codesetp; |
280 | ||
281 | if (codeset != NULL) | |
282 | { | |
283 | char *result; | |
284 | ||
252b5132 | 285 | #if defined _LIBC || defined HAVE_STRDUP |
bf070c84 SE |
286 | result = strdup (codeset); |
287 | if (__builtin_expect (result == NULL, 0)) | |
288 | goto failed_codeset; | |
252b5132 | 289 | #else |
bf070c84 SE |
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); | |
252b5132 | 295 | #endif |
bf070c84 SE |
296 | codeset = result; |
297 | new_binding->codeset_cntr++; | |
298 | } | |
299 | *codesetp = codeset; | |
300 | new_binding->codeset = (char *) codeset; | |
252b5132 | 301 | } |
bf070c84 SE |
302 | else |
303 | new_binding->codeset = NULL; | |
252b5132 RH |
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 | ||
bf070c84 SE |
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 | } | |
252b5132 RH |
339 | } |
340 | ||
bf070c84 SE |
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; | |
252b5132 RH |
368 | } |
369 | ||
370 | #ifdef _LIBC | |
bf070c84 | 371 | /* Aliases for function names in GNU C Library. */ |
252b5132 | 372 | weak_alias (__bindtextdomain, bindtextdomain); |
bf070c84 | 373 | weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset); |
252b5132 | 374 | #endif |