| 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
| 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 |