www.pudn.com > gedit-2.8.3.rar > dcgettext.c
/* Implementation of the dcgettext(3) function. Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include#endif #include #ifdef __GNUC__ # define alloca __builtin_alloca # define HAVE_ALLOCA 1 #else # if defined HAVE_ALLOCA_H || defined _LIBC # include # else # ifdef _AIX #pragma alloca # else # ifndef alloca char *alloca (); # endif # endif # endif #endif #include #ifndef errno extern int errno; #endif #ifndef __set_errno # define __set_errno(val) errno = (val) #endif #if defined STDC_HEADERS || defined _LIBC # include #else char *getenv (); # ifdef HAVE_MALLOC_H # include # else void free (); # endif #endif #if defined HAVE_STRING_H || defined _LIBC # ifndef _GNU_SOURCE # define _GNU_SOURCE 1 # endif # include #else # include #endif #if !HAVE_STRCHR && !defined _LIBC # ifndef strchr # define strchr index # endif #endif #if defined HAVE_UNISTD_H || defined _LIBC # include #endif #include "gettext.h" #include "gettextP.h" #ifdef _LIBC # include #else # include "libgettext.h" #endif #include "hash-string.h" /* @@ end of prolog @@ */ #ifdef _LIBC /* Rename the non ANSI C functions. This is required by the standard because some ANSI C functions will require linking with this object file and the name space must not be polluted. */ # define getcwd __getcwd # ifndef stpcpy # define stpcpy __stpcpy # endif #else # if !defined HAVE_GETCWD char *getwd (); # define getcwd(buf, max) getwd (buf) # else char *getcwd (); # endif # ifndef HAVE_STPCPY static char *stpcpy PARAMS ((char *dest, const char *src)); # endif #endif /* Amount to increase buffer size by in each try. */ #define PATH_INCR 32 /* The following is from pathmax.h. */ /* Non-POSIX BSD systems might have gcc's limits.h, which doesn't define PATH_MAX but might cause redefinition warnings when sys/param.h is later included (as on MORE/BSD 4.3). */ #if defined(_POSIX_VERSION) || (defined(HAVE_LIMITS_H) && !defined(__GNUC__)) # include #endif #ifndef _POSIX_PATH_MAX # define _POSIX_PATH_MAX 255 #endif #if !defined(PATH_MAX) && defined(_PC_PATH_MAX) # define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf ("/", _PC_PATH_MAX)) #endif /* Don't include sys/param.h if it already has been. */ #if defined(HAVE_SYS_PARAM_H) && !defined(PATH_MAX) && !defined(MAXPATHLEN) # include #endif #if !defined(PATH_MAX) && defined(MAXPATHLEN) # define PATH_MAX MAXPATHLEN #endif #ifndef PATH_MAX # define PATH_MAX _POSIX_PATH_MAX #endif /* XPG3 defines the result of `setlocale (category, NULL)' as: ``Directs `setlocale()' to query `category' and return the current setting of `local'.'' However it does not specify the exact format. And even worse: POSIX defines this not at all. So we can use this feature only on selected system (e.g. those using GNU C Library). */ #ifdef _LIBC # define HAVE_LOCALE_NULL #endif /* Name of the default domain used for gettext(3) prior any call to textdomain(3). The default value for this is "messages". */ const char _nl_default_default_domain[] = "messages"; /* Value used as the default domain for gettext(3). */ const char *_nl_current_default_domain = _nl_default_default_domain; /* Contains the default location of the message catalogs. */ const char _nl_default_dirname[] = GNULOCALEDIR; /* List with bindings of specific domains created by bindtextdomain() calls. */ struct binding *_nl_domain_bindings; /* Prototypes for local functions. */ static char *find_msg PARAMS ((struct loaded_l10nfile *domain_file, const char *msgid)) internal_function; static const char *category_to_name PARAMS ((int category)) internal_function; static const char *guess_category_value PARAMS ((int category, const char *categoryname)) internal_function; /* For those loosing systems which don't have `alloca' we have to add some additional code emulating it. */ #ifdef HAVE_ALLOCA /* Nothing has to be done. */ # define ADD_BLOCK(list, address) /* nothing */ # define FREE_BLOCKS(list) /* nothing */ #else struct block_list { void *address; struct block_list *next; }; # define ADD_BLOCK(list, addr) \ do { \ struct block_list *newp = (struct block_list *) malloc (sizeof (*newp)); \ /* If we cannot get a free block we cannot add the new element to \ the list. */ \ if (newp != NULL) { \ newp->address = (addr); \ newp->next = (list); \ (list) = newp; \ } \ } while (0) # define FREE_BLOCKS(list) \ do { \ while (list != NULL) { \ struct block_list *old = list; \ list = list->next; \ free (old); \ } \ } while (0) # undef alloca # define alloca(size) (malloc (size)) #endif /* have alloca */ /* Names for the libintl functions are a problem. They must not clash with existing names and they should follow ANSI C. But this source code is also used in GNU C Library where the names have a __ prefix. So we have to make a difference here. */ #ifdef _LIBC # define DCGETTEXT __dcgettext #else # define DCGETTEXT dcgettext__ #endif /* Look up MSGID in the DOMAINNAME message catalog for the current CATEGORY locale. */ char * DCGETTEXT (domainname, msgid, category) const char *domainname; const char *msgid; int category; { #ifndef HAVE_ALLOCA struct block_list *block_list = NULL; #endif struct loaded_l10nfile *domain; struct binding *binding; const char *categoryname; const char *categoryvalue; char *dirname, *xdomainname; char *single_locale; char *retval; int saved_errno = errno; /* If no real MSGID is given return NULL. */ if (msgid == NULL) return NULL; /* If DOMAINNAME is NULL, we are interested in the default domain. If CATEGORY is not LC_MESSAGES this might not make much sense but the defintion left this undefined. */ if (domainname == NULL) domainname = _nl_current_default_domain; /* First find matching binding. */ for (binding = _nl_domain_bindings; binding != NULL; binding = binding->next) { int compare = strcmp (domainname, binding->domainname); if (compare == 0) /* We found it! */ break; if (compare < 0) { /* It is not in the list. */ binding = NULL; break; } } if (binding == NULL) dirname = (char *) _nl_default_dirname; else if (binding->dirname[0] == '/') dirname = binding->dirname; else { /* We have a relative path. Make it absolute now. */ size_t dirname_len = strlen (binding->dirname) + 1; size_t path_max; char *ret; path_max = (unsigned) PATH_MAX; path_max += 2; /* The getcwd docs say to do this. */ dirname = (char *) alloca (path_max + dirname_len); ADD_BLOCK (block_list, dirname); __set_errno (0); while ((ret = getcwd (dirname, path_max)) == NULL && errno == ERANGE) { path_max += PATH_INCR; dirname = (char *) alloca (path_max + dirname_len); ADD_BLOCK (block_list, dirname); __set_errno (0); } if (ret == NULL) { /* We cannot get the current working directory. Don't signal an error but simply return the default string. */ FREE_BLOCKS (block_list); __set_errno (saved_errno); return (char *) msgid; } stpcpy (stpcpy (strchr (dirname, '\0'), "/"), binding->dirname); } /* Now determine the symbolic name of CATEGORY and its value. */ categoryname = category_to_name (category); categoryvalue = guess_category_value (category, categoryname); xdomainname = (char *) alloca (strlen (categoryname) + strlen (domainname) + 5); ADD_BLOCK (block_list, xdomainname); stpcpy (stpcpy (stpcpy (stpcpy (xdomainname, categoryname), "/"), domainname), ".mo"); /* Creating working area. */ single_locale = (char *) alloca (strlen (categoryvalue) + 1); ADD_BLOCK (block_list, single_locale); /* Search for the given string. This is a loop because we perhaps got an ordered list of languages to consider for th translation. */ while (1) { /* Make CATEGORYVALUE point to the next element of the list. */ while (categoryvalue[0] != '\0' && categoryvalue[0] == ':') ++categoryvalue; if (categoryvalue[0] == '\0') { /* The whole contents of CATEGORYVALUE has been searched but no valid entry has been found. We solve this situation by implicitly appending a "C" entry, i.e. no translation will take place. */ single_locale[0] = 'C'; single_locale[1] = '\0'; } else { char *cp = single_locale; while (categoryvalue[0] != '\0' && categoryvalue[0] != ':') *cp++ = *categoryvalue++; *cp = '\0'; } /* If the current locale value is C (or POSIX) we don't load a domain. Return the MSGID. */ if (strcmp (single_locale, "C") == 0 || strcmp (single_locale, "POSIX") == 0) { FREE_BLOCKS (block_list); __set_errno (saved_errno); return (char *) msgid; } /* Find structure describing the message catalog matching the DOMAINNAME and CATEGORY. */ domain = _nl_find_domain (dirname, single_locale, xdomainname); if (domain != NULL) { retval = find_msg (domain, msgid); if (retval == NULL) { int cnt; for (cnt = 0; domain->successor[cnt] != NULL; ++cnt) { retval = find_msg (domain->successor[cnt], msgid); if (retval != NULL) break; } } if (retval != NULL) { FREE_BLOCKS (block_list); __set_errno (saved_errno); return retval; } } } /* NOTREACHED */ } #ifdef _LIBC /* Alias for function name in GNU C Library. */ weak_alias (__dcgettext, dcgettext); #endif static char * internal_function find_msg (domain_file, msgid) struct loaded_l10nfile *domain_file; const char *msgid; { size_t top, act, bottom; struct loaded_domain *domain; if (domain_file->decided == 0) _nl_load_domain (domain_file); if (domain_file->data == NULL) return NULL; domain = (struct loaded_domain *) domain_file->data; /* Locate the MSGID and its translation. */ if (domain->hash_size > 2 && domain->hash_tab != NULL) { /* Use the hashing table. */ nls_uint32 len = strlen (msgid); nls_uint32 hash_val = hash_string (msgid); nls_uint32 idx = hash_val % domain->hash_size; nls_uint32 incr = 1 + (hash_val % (domain->hash_size - 2)); nls_uint32 nstr = W (domain->must_swap, domain->hash_tab[idx]); if (nstr == 0) /* Hash table entry is empty. */ return NULL; if (W (domain->must_swap, domain->orig_tab[nstr - 1].length) == len && strcmp (msgid, domain->data + W (domain->must_swap, domain->orig_tab[nstr - 1].offset)) == 0) return (char *) domain->data + W (domain->must_swap, domain->trans_tab[nstr - 1].offset); while (1) { if (idx >= domain->hash_size - incr) idx -= domain->hash_size - incr; else idx += incr; nstr = W (domain->must_swap, domain->hash_tab[idx]); if (nstr == 0) /* Hash table entry is empty. */ return NULL; if (W (domain->must_swap, domain->orig_tab[nstr - 1].length) == len && strcmp (msgid, domain->data + W (domain->must_swap, domain->orig_tab[nstr - 1].offset)) == 0) return (char *) domain->data + W (domain->must_swap, domain->trans_tab[nstr - 1].offset); } /* NOTREACHED */ } /* Now we try the default method: binary search in the sorted array of messages. */ bottom = 0; top = domain->nstrings; while (bottom < top) { int cmp_val; act = (bottom + top) / 2; cmp_val = strcmp (msgid, domain->data + W (domain->must_swap, domain->orig_tab[act].offset)); if (cmp_val < 0) top = act; else if (cmp_val > 0) bottom = act + 1; else break; } /* If an translation is found return this. */ return bottom >= top ? NULL : (char *) domain->data + W (domain->must_swap, domain->trans_tab[act].offset); } /* Return string representation of locale CATEGORY. */ static const char * internal_function category_to_name (category) int category; { const char *retval; switch (category) { #ifdef LC_COLLATE case LC_COLLATE: retval = "LC_COLLATE"; break; #endif #ifdef LC_CTYPE case LC_CTYPE: retval = "LC_CTYPE"; break; #endif #ifdef LC_MONETARY case LC_MONETARY: retval = "LC_MONETARY"; break; #endif #ifdef LC_NUMERIC case LC_NUMERIC: retval = "LC_NUMERIC"; break; #endif #ifdef LC_TIME case LC_TIME: retval = "LC_TIME"; break; #endif #ifdef LC_MESSAGES case LC_MESSAGES: retval = "LC_MESSAGES"; break; #endif #ifdef LC_RESPONSE case LC_RESPONSE: retval = "LC_RESPONSE"; break; #endif #ifdef LC_ALL case LC_ALL: /* This might not make sense but is perhaps better than any other value. */ retval = "LC_ALL"; break; #endif default: /* If you have a better idea for a default value let me know. */ retval = "LC_XXX"; } return retval; } /* Guess value of current locale from value of the environment variables. */ static const char * internal_function guess_category_value (category, categoryname) int category; const char *categoryname; { const char *retval; /* The highest priority value is the `LANGUAGE' environment variable. This is a GNU extension. */ retval = getenv ("LANGUAGE"); if (retval != NULL && retval[0] != '\0') return retval; /* `LANGUAGE' is not set. So we have to proceed with the POSIX methods of looking to `LC_ALL', `LC_xxx', and `LANG'. On some systems this can be done by the `setlocale' function itself. */ #if defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES && defined HAVE_LOCALE_NULL return setlocale (category, NULL); #else /* Setting of LC_ALL overwrites all other. */ retval = getenv ("LC_ALL"); if (retval != NULL && retval[0] != '\0') return retval; /* Next comes the name of the desired category. */ retval = getenv (categoryname); if (retval != NULL && retval[0] != '\0') return retval; /* Last possibility is the LANG environment variable. */ retval = getenv ("LANG"); if (retval != NULL && retval[0] != '\0') return retval; /* We use C as the default domain. POSIX says this is implementation defined. */ return "C"; #endif } /* @@ begin of epilog @@ */ /* We don't want libintl.a to depend on any other library. So we avoid the non-standard function stpcpy. In GNU C Library this function is available, though. Also allow the symbol HAVE_STPCPY to be defined. */ #if !_LIBC && !HAVE_STPCPY static char * stpcpy (dest, src) char *dest; const char *src; { while ((*dest++ = *src++) != '\0') /* Do nothing. */ ; return dest - 1; } #endif #ifdef _LIBC /* If we want to free all resources we have to do some work at program's end. */ static void __attribute__ ((unused)) free_mem (void) { struct binding *runp; for (runp = _nl_domain_bindings; runp != NULL; runp = runp->next) { free (runp->domainname); if (runp->dirname != _nl_default_dirname) /* Yes, this is a pointer comparison. */ free (runp->dirname); } if (_nl_current_default_domain != _nl_default_default_domain) /* Yes, again a pointer comparison. */ free ((char *) _nl_current_default_domain); } text_set_element (__libc_subfreeres, free_mem); #endif