1 /* Implementation of the bindtextdomain(3) function 2 Copyright (C) 1995-1998, 2000, 2001 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 _nl_default_dirname__ 49 # define _nl_domain_bindings _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 62 /* List with bindings of specific domains. */ 63 extern struct binding *_nl_domain_bindings; 64 65 /* Lock variable to protect the global data in the gettext implementation. */ 66 __libc_rwlock_define (extern, _nl_state_lock) 67 68 69 /* Names for the libintl functions are a problem. They must not clash 70 with existing names and they should follow ANSI C. But this source 71 code is also used in GNU C Library where the names have a __ 72 prefix. So we have to make a difference here. */ 73 #ifdef _LIBC 74 # define BINDTEXTDOMAIN __bindtextdomain 75 # define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset 76 # ifndef strdup 77 # define strdup(str) __strdup (str) 78 # endif 79 #else 80 # define BINDTEXTDOMAIN bindtextdomain__ 81 # define BIND_TEXTDOMAIN_CODESET bind_textdomain_codeset__ 82 #endif 83 84 /* Prototypes for local functions. */ 85 static void set_binding_values PARAMS ((const char *domainname, 86 const char **dirnamep, 87 const char **codesetp)); 88 89 /* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP 90 to be used for the DOMAINNAME message catalog. 91 If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not 92 modified, only the current value is returned. 93 If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither 94 modified nor returned. */ 95 static void 96 set_binding_values (domainname, dirnamep, codesetp) 97 const char *domainname; 98 const char **dirnamep; 99 const char **codesetp; 100 { 101 struct binding *binding; 102 int modified; 103 104 /* Some sanity checks. */ 105 if (domainname == NULL || domainname[0] == '\0') 106 { 107 if (dirnamep) 108 *dirnamep = NULL; 109 if (codesetp) 110 *codesetp = NULL; 111 return; 112 } 113 114 __libc_rwlock_wrlock (_nl_state_lock); 115 116 modified = 0; 117 118 for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next) 119 { 120 int compare = strcmp (domainname, binding->domainname); 121 if (compare == 0) 122 /* We found it! */ 123 break; 124 if (compare < 0) 125 { 126 /* It is not in the list. */ 127 binding = NULL; 128 break; 129 } 130 } 131 132 if (binding != NULL) 133 { 134 if (dirnamep) 135 { 136 const char *dirname = *dirnamep; 137 138 if (dirname == NULL) 139 /* The current binding has be to returned. */ 140 *dirnamep = binding->dirname; 141 else 142 { 143 /* The domain is already bound. If the new value and the old 144 one are equal we simply do nothing. Otherwise replace the 145 old binding. */ 146 char *result = binding->dirname; 147 if (strcmp (dirname, result) != 0) 148 { 149 if (strcmp (dirname, _nl_default_dirname) == 0) 150 result = (char *) _nl_default_dirname; 151 else 152 { 153 #if defined _LIBC || defined HAVE_STRDUP 154 result = strdup (dirname); 155 #else 156 size_t len = strlen (dirname) + 1; 157 result = (char *) malloc (len); 158 if (__builtin_expect (result != NULL, 1)) 159 memcpy (result, dirname, len); 160 #endif 161 } 162 163 if (__builtin_expect (result != NULL, 1)) 164 { 165 if (binding->dirname != _nl_default_dirname) 166 free (binding->dirname); 167 168 binding->dirname = result; 169 modified = 1; 170 } 171 } 172 *dirnamep = result; 173 } 174 } 175 176 if (codesetp) 177 { 178 const char *codeset = *codesetp; 179 180 if (codeset == NULL) 181 /* The current binding has be to returned. */ 182 *codesetp = binding->codeset; 183 else 184 { 185 /* The domain is already bound. If the new value and the old 186 one are equal we simply do nothing. Otherwise replace the 187 old binding. */ 188 char *result = binding->codeset; 189 if (result == NULL || strcmp (codeset, result) != 0) 190 { 191 #if defined _LIBC || defined HAVE_STRDUP 192 result = strdup (codeset); 193 #else 194 size_t len = strlen (codeset) + 1; 195 result = (char *) malloc (len); 196 if (__builtin_expect (result != NULL, 1)) 197 memcpy (result, codeset, len); 198 #endif 199 200 if (__builtin_expect (result != NULL, 1)) 201 { 202 if (binding->codeset != NULL) 203 free (binding->codeset); 204 205 binding->codeset = result; 206 binding->codeset_cntr++; 207 modified = 1; 208 } 209 } 210 *codesetp = result; 211 } 212 } 213 } 214 else if ((dirnamep == NULL || *dirnamep == NULL) 215 && (codesetp == NULL || *codesetp == NULL)) 216 { 217 /* Simply return the default values. */ 218 if (dirnamep) 219 *dirnamep = _nl_default_dirname; 220 if (codesetp) 221 *codesetp = NULL; 222 } 223 else 224 { 225 /* We have to create a new binding. */ 226 size_t len = strlen (domainname) + 1; 227 struct binding *new_binding = 228 (struct binding *) malloc (offsetof (struct binding, domainname) + len); 229 230 if (__builtin_expect (new_binding == NULL, 0)) 231 goto failed; 232 233 memcpy (new_binding->domainname, domainname, len); 234 235 if (dirnamep) 236 { 237 const char *dirname = *dirnamep; 238 239 if (dirname == NULL) 240 /* The default value. */ 241 dirname = _nl_default_dirname; 242 else 243 { 244 if (strcmp (dirname, _nl_default_dirname) == 0) 245 dirname = _nl_default_dirname; 246 else 247 { 248 char *result; 249 #if defined _LIBC || defined HAVE_STRDUP 250 result = strdup (dirname); 251 if (__builtin_expect (result == NULL, 0)) 252 goto failed_dirname; 253 #else 254 size_t len = strlen (dirname) + 1; 255 result = (char *) malloc (len); 256 if (__builtin_expect (result == NULL, 0)) 257 goto failed_dirname; 258 memcpy (result, dirname, len); 259 #endif 260 dirname = result; 261 } 262 } 263 *dirnamep = dirname; 264 new_binding->dirname = (char *) dirname; 265 } 266 else 267 /* The default value. */ 268 new_binding->dirname = (char *) _nl_default_dirname; 269 270 new_binding->codeset_cntr = 0; 271 272 if (codesetp) 273 { 274 const char *codeset = *codesetp; 275 276 if (codeset != NULL) 277 { 278 char *result; 279 280 #if defined _LIBC || defined HAVE_STRDUP 281 result = strdup (codeset); 282 if (__builtin_expect (result == NULL, 0)) 283 goto failed_codeset; 284 #else 285 size_t len = strlen (codeset) + 1; 286 result = (char *) malloc (len); 287 if (__builtin_expect (result == NULL, 0)) 288 goto failed_codeset; 289 memcpy (result, codeset, len); 290 #endif 291 codeset = result; 292 new_binding->codeset_cntr++; 293 } 294 *codesetp = codeset; 295 new_binding->codeset = (char *) codeset; 296 } 297 else 298 new_binding->codeset = NULL; 299 300 /* Now enqueue it. */ 301 if (_nl_domain_bindings == NULL 302 || strcmp (domainname, _nl_domain_bindings->domainname) < 0) 303 { 304 new_binding->next = _nl_domain_bindings; 305 _nl_domain_bindings = new_binding; 306 } 307 else 308 { 309 binding = _nl_domain_bindings; 310 while (binding->next != NULL 311 && strcmp (domainname, binding->next->domainname) > 0) 312 binding = binding->next; 313 314 new_binding->next = binding->next; 315 binding->next = new_binding; 316 } 317 318 modified = 1; 319 320 /* Here we deal with memory allocation failures. */ 321 if (0) 322 { 323 failed_codeset: 324 if (new_binding->dirname != _nl_default_dirname) 325 free (new_binding->dirname); 326 failed_dirname: 327 free (new_binding); 328 failed: 329 if (dirnamep) 330 *dirnamep = NULL; 331 if (codesetp) 332 *codesetp = NULL; 333 } 334 } 335 336 /* If we modified any binding, we flush the caches. */ 337 if (modified) 338 ++_nl_msg_cat_cntr; 339 340 __libc_rwlock_unlock (_nl_state_lock); 341 } 342 343 /* Specify that the DOMAINNAME message catalog will be found 344 in DIRNAME rather than in the system locale data base. */ 345 char * 346 BINDTEXTDOMAIN (domainname, dirname) 347 const char *domainname; 348 const char *dirname; 349 { 350 set_binding_values (domainname, &dirname, NULL); 351 return (char *) dirname; 352 } 353 354 /* Specify the character encoding in which the messages from the 355 DOMAINNAME message catalog will be returned. */ 356 char * 357 BIND_TEXTDOMAIN_CODESET (domainname, codeset) 358 const char *domainname; 359 const char *codeset; 360 { 361 set_binding_values (domainname, NULL, &codeset); 362 return (char *) codeset; 363 } 364 365 #ifdef _LIBC 366 /* Aliases for function names in GNU C Library. */ 367 weak_alias (__bindtextdomain, bindtextdomain); 368 weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset); 369 #endif 370