1 /* Implementation of the dcgettext(3) function.
2 Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
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
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #include <sys/types.h>
24 #if defined __GNUC__ && !defined C_ALLOCA
25 # define alloca __builtin_alloca
26 # define HAVE_ALLOCA 1
28 # if (defined HAVE_ALLOCA_H || defined _LIBC) && !defined C_ALLOCA
46 # define __set_errno(val) errno = (val)
49 #if defined STDC_HEADERS || defined _LIBC
60 #if defined HAVE_STRING_H || defined _LIBC
62 # define _GNU_SOURCE 1
68 #if !HAVE_STRCHR && !defined _LIBC
74 #if defined HAVE_UNISTD_H || defined _LIBC
83 # include "libgettext.h"
85 #include "hash-string.h"
87 /* @@ end of prolog @@ */
90 /* Rename the non ANSI C functions. This is required by the standard
91 because some ANSI C functions will require linking with this object
92 file and the name space must not be polluted. */
93 # define getcwd __getcwd
95 # define stpcpy __stpcpy
98 # if !defined HAVE_GETCWD
100 # define getcwd(buf, max) getwd (buf)
105 static char *stpcpy PARAMS ((char *dest, const char *src));
109 /* Amount to increase buffer size by in each try. */
112 /* The following is from pathmax.h. */
113 /* Non-POSIX BSD systems might have gcc's limits.h, which doesn't define
114 PATH_MAX but might cause redefinition warnings when sys/param.h is
115 later included (as on MORE/BSD 4.3). */
116 #if defined(_POSIX_VERSION) || (defined(HAVE_LIMITS_H) && !defined(__GNUC__))
120 #ifndef _POSIX_PATH_MAX
121 # define _POSIX_PATH_MAX 255
124 #if !defined(PATH_MAX) && defined(_PC_PATH_MAX)
125 # define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf ("/", _PC_PATH_MAX))
128 /* Don't include sys/param.h if it already has been. */
129 #if defined(HAVE_SYS_PARAM_H) && !defined(PATH_MAX) && !defined(MAXPATHLEN)
130 # include <sys/param.h>
133 #if !defined(PATH_MAX) && defined(MAXPATHLEN)
134 # define PATH_MAX MAXPATHLEN
138 # define PATH_MAX _POSIX_PATH_MAX
141 /* XPG3 defines the result of `setlocale (category, NULL)' as:
142 ``Directs `setlocale()' to query `category' and return the current
143 setting of `local'.''
144 However it does not specify the exact format. And even worse: POSIX
145 defines this not at all. So we can use this feature only on selected
146 system (e.g. those using GNU C Library). */
148 # define HAVE_LOCALE_NULL
151 /* Name of the default domain used for gettext(3) prior any call to
152 textdomain(3). The default value for this is "messages". */
153 const char _nl_default_default_domain[] = "messages";
155 /* Value used as the default domain for gettext(3). */
156 const char *_nl_current_default_domain = _nl_default_default_domain;
158 /* Contains the default location of the message catalogs. */
159 const char _nl_default_dirname[] = GNULOCALEDIR;
161 /* List with bindings of specific domains created by bindtextdomain()
163 struct binding *_nl_domain_bindings;
165 /* Prototypes for local functions. */
166 static char *find_msg PARAMS ((struct loaded_l10nfile *domain_file,
167 const char *msgid)) internal_function;
168 static const char *category_to_name PARAMS ((int category)) internal_function;
169 static const char *guess_category_value PARAMS ((int category,
170 const char *categoryname))
174 /* For those loosing systems which don't have `alloca' we have to add
175 some additional code emulating it. */
177 /* Nothing has to be done. */
178 # define ADD_BLOCK(list, address) /* nothing */
179 # define FREE_BLOCKS(list) /* nothing */
184 struct block_list *next;
186 # define ADD_BLOCK(list, addr) \
188 struct block_list *newp = (struct block_list *) malloc (sizeof (*newp)); \
189 /* If we cannot get a free block we cannot add the new element to \
191 if (newp != NULL) { \
192 newp->address = (addr); \
193 newp->next = (list); \
197 # define FREE_BLOCKS(list) \
199 while (list != NULL) { \
200 struct block_list *old = list; \
206 # define alloca(size) (malloc (size))
207 #endif /* have alloca */
210 /* Names for the libintl functions are a problem. They must not clash
211 with existing names and they should follow ANSI C. But this source
212 code is also used in GNU C Library where the names have a __
213 prefix. So we have to make a difference here. */
215 # define DCGETTEXT __dcgettext
217 # define DCGETTEXT dcgettext__
220 /* Checking whether the binaries runs SUID must be done and glibc provides
221 easier methods therefore we make a difference here. */
223 # define ENABLE_SECURE __libc_enable_secure
224 # define DETERMINE_SECURE
226 static int enable_secure;
227 # define ENABLE_SECURE (enable_secure == 1)
228 # define DETERMINE_SECURE \
229 if (enable_secure == 0) \
231 if (getuid () != geteuid () || getgid () != getegid ()) \
234 enable_secure = -1; \
238 /* Look up MSGID in the DOMAINNAME message catalog for the current CATEGORY
241 DCGETTEXT (domainname, msgid, category)
242 const char *domainname;
247 struct block_list *block_list = NULL;
249 struct loaded_l10nfile *domain;
250 struct binding *binding;
251 const char *categoryname;
252 const char *categoryvalue;
253 char *dirname, *xdomainname;
256 int saved_errno = errno;
258 /* If no real MSGID is given return NULL. */
262 /* See whether this is a SUID binary or not. */
265 /* If DOMAINNAME is NULL, we are interested in the default domain. If
266 CATEGORY is not LC_MESSAGES this might not make much sense but the
267 definition left this undefined. */
268 if (domainname == NULL)
269 domainname = _nl_current_default_domain;
271 /* First find matching binding. */
272 for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next)
274 int compare = strcmp (domainname, binding->domainname);
280 /* It is not in the list. */
287 dirname = (char *) _nl_default_dirname;
288 else if (binding->dirname[0] == '/')
289 dirname = binding->dirname;
292 /* We have a relative path. Make it absolute now. */
293 size_t dirname_len = strlen (binding->dirname) + 1;
297 path_max = (unsigned int) PATH_MAX;
298 path_max += 2; /* The getcwd docs say to do this. */
300 dirname = (char *) alloca (path_max + dirname_len);
301 ADD_BLOCK (block_list, dirname);
304 while ((ret = getcwd (dirname, path_max)) == NULL && errno == ERANGE)
306 path_max += PATH_INCR;
307 dirname = (char *) alloca (path_max + dirname_len);
308 ADD_BLOCK (block_list, dirname);
314 /* We cannot get the current working directory. Don't signal an
315 error but simply return the default string. */
316 FREE_BLOCKS (block_list);
317 __set_errno (saved_errno);
318 return (char *) msgid;
321 stpcpy (stpcpy (strchr (dirname, '\0'), "/"), binding->dirname);
324 /* Now determine the symbolic name of CATEGORY and its value. */
325 categoryname = category_to_name (category);
326 categoryvalue = guess_category_value (category, categoryname);
328 xdomainname = (char *) alloca (strlen (categoryname)
329 + strlen (domainname) + 5);
330 ADD_BLOCK (block_list, xdomainname);
332 stpcpy (stpcpy (stpcpy (stpcpy (xdomainname, categoryname), "/"),
336 /* Creating working area. */
337 single_locale = (char *) alloca (strlen (categoryvalue) + 1);
338 ADD_BLOCK (block_list, single_locale);
341 /* Search for the given string. This is a loop because we perhaps
342 got an ordered list of languages to consider for the translation. */
345 /* Make CATEGORYVALUE point to the next element of the list. */
346 while (categoryvalue[0] != '\0' && categoryvalue[0] == ':')
348 if (categoryvalue[0] == '\0')
350 /* The whole contents of CATEGORYVALUE has been searched but
351 no valid entry has been found. We solve this situation
352 by implicitly appending a "C" entry, i.e. no translation
354 single_locale[0] = 'C';
355 single_locale[1] = '\0';
359 char *cp = single_locale;
360 while (categoryvalue[0] != '\0' && categoryvalue[0] != ':')
361 *cp++ = *categoryvalue++;
364 /* When this is a SUID binary we must not allow accessing files
365 outside the dedicated directories. */
367 && (memchr (single_locale, '/',
368 _nl_find_language (single_locale) - single_locale)
370 /* Ingore this entry. */
374 /* If the current locale value is C (or POSIX) we don't load a
375 domain. Return the MSGID. */
376 if (strcmp (single_locale, "C") == 0
377 || strcmp (single_locale, "POSIX") == 0)
379 FREE_BLOCKS (block_list);
380 __set_errno (saved_errno);
381 return (char *) msgid;
385 /* Find structure describing the message catalog matching the
386 DOMAINNAME and CATEGORY. */
387 domain = _nl_find_domain (dirname, single_locale, xdomainname);
391 retval = find_msg (domain, msgid);
397 for (cnt = 0; domain->successor[cnt] != NULL; ++cnt)
399 retval = find_msg (domain->successor[cnt], msgid);
408 FREE_BLOCKS (block_list);
409 __set_errno (saved_errno);
418 /* Alias for function name in GNU C Library. */
419 weak_alias (__dcgettext, dcgettext);
425 find_msg (domain_file, msgid)
426 struct loaded_l10nfile *domain_file;
431 struct loaded_domain *domain;
433 if (domain_file->decided == 0)
434 _nl_load_domain (domain_file);
436 if (domain_file->data == NULL)
439 domain = (struct loaded_domain *) domain_file->data;
441 /* Locate the MSGID and its translation. */
442 if (domain->hash_size > 2 && domain->hash_tab != NULL)
444 /* Use the hashing table. */
445 nls_uint32 len = strlen (msgid);
446 nls_uint32 hash_val = hash_string (msgid);
447 nls_uint32 idx = hash_val % domain->hash_size;
448 nls_uint32 incr = 1 + (hash_val % (domain->hash_size - 2));
449 nls_uint32 nstr = W (domain->must_swap, domain->hash_tab[idx]);
452 /* Hash table entry is empty. */
455 if (W (domain->must_swap, domain->orig_tab[nstr - 1].length) == len
457 domain->data + W (domain->must_swap,
458 domain->orig_tab[nstr - 1].offset)) == 0)
459 return (char *) domain->data + W (domain->must_swap,
460 domain->trans_tab[nstr - 1].offset);
464 if (idx >= domain->hash_size - incr)
465 idx -= domain->hash_size - incr;
469 nstr = W (domain->must_swap, domain->hash_tab[idx]);
471 /* Hash table entry is empty. */
474 if (W (domain->must_swap, domain->orig_tab[nstr - 1].length) == len
476 domain->data + W (domain->must_swap,
477 domain->orig_tab[nstr - 1].offset))
479 return (char *) domain->data
480 + W (domain->must_swap, domain->trans_tab[nstr - 1].offset);
485 /* Now we try the default method: binary search in the sorted
486 array of messages. */
488 top = domain->nstrings;
493 act = (bottom + top) / 2;
494 cmp_val = strcmp (msgid, domain->data
495 + W (domain->must_swap,
496 domain->orig_tab[act].offset));
499 else if (cmp_val > 0)
505 /* If an translation is found return this. */
506 return bottom >= top ? NULL : (char *) domain->data
507 + W (domain->must_swap,
508 domain->trans_tab[act].offset);
512 /* Return string representation of locale CATEGORY. */
515 category_to_name (category)
524 retval = "LC_COLLATE";
534 retval = "LC_MONETARY";
539 retval = "LC_NUMERIC";
549 retval = "LC_MESSAGES";
554 retval = "LC_RESPONSE";
559 /* This might not make sense but is perhaps better than any other
565 /* If you have a better idea for a default value let me know. */
572 /* Guess value of current locale from value of the environment variables. */
575 guess_category_value (category, categoryname)
577 const char *categoryname;
581 /* The highest priority value is the `LANGUAGE' environment
582 variable. This is a GNU extension. */
583 retval = getenv ("LANGUAGE");
584 if (retval != NULL && retval[0] != '\0')
587 /* `LANGUAGE' is not set. So we have to proceed with the POSIX
588 methods of looking to `LC_ALL', `LC_xxx', and `LANG'. On some
589 systems this can be done by the `setlocale' function itself. */
590 #if defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES && defined HAVE_LOCALE_NULL
591 return setlocale (category, NULL);
593 /* Setting of LC_ALL overwrites all other. */
594 retval = getenv ("LC_ALL");
595 if (retval != NULL && retval[0] != '\0')
598 /* Next comes the name of the desired category. */
599 retval = getenv (categoryname);
600 if (retval != NULL && retval[0] != '\0')
603 /* Last possibility is the LANG environment variable. */
604 retval = getenv ("LANG");
605 if (retval != NULL && retval[0] != '\0')
608 /* We use C as the default domain. POSIX says this is implementation
614 /* @@ begin of epilog @@ */
616 /* We don't want libintl.a to depend on any other library. So we
617 avoid the non-standard function stpcpy. In GNU C Library this
618 function is available, though. Also allow the symbol HAVE_STPCPY
620 #if !_LIBC && !HAVE_STPCPY
626 while ((*dest++ = *src++) != '\0')
634 /* If we want to free all resources we have to do some work at
636 static void __attribute__ ((unused))
639 struct binding *runp;
641 for (runp = _nl_domain_bindings; runp != NULL; runp = runp->next)
643 free (runp->domainname);
644 if (runp->dirname != _nl_default_dirname)
645 /* Yes, this is a pointer comparison. */
646 free (runp->dirname);
649 if (_nl_current_default_domain != _nl_default_default_domain)
650 /* Yes, again a pointer comparison. */
651 free ((char *) _nl_current_default_domain);
654 text_set_element (__libc_subfreeres, free_mem);