intl/textdomain.c (raw)
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/* Implementation of the textdomain(3) function. Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU Library 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 Library General Public License for more details. You should have received a copy of the GNU Library 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 <config.h> #endif #include <stdlib.h> #include <string.h> #ifdef _LIBC # include <libintl.h> #else # include "libgnuintl.h" #endif #include "gettextP.h" #ifdef _LIBC /* We have to handle multi-threaded applications. */ # include <bits/libc-lock.h> #else /* Provide dummy implementation if this is outside glibc. */ # define __libc_rwlock_define(CLASS, NAME) # define __libc_rwlock_wrlock(NAME) # define __libc_rwlock_unlock(NAME) #endif /* The internal variables in the standalone libintl.a must have different names than the internal variables in GNU libc, otherwise programs using libintl.a cannot be linked statically. */ #if !defined _LIBC # define _nl_default_default_domain libintl_nl_default_default_domain # define _nl_current_default_domain libintl_nl_current_default_domain #endif /* @@ end of prolog @@ */ /* Name of the default text domain. */ extern const char _nl_default_default_domain[] attribute_hidden; /* Default text domain in which entries for gettext(3) are to be found. */ extern const char *_nl_current_default_domain attribute_hidden; /* 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 TEXTDOMAIN __textdomain # ifndef strdup # define strdup(str) __strdup (str) # endif #else # define TEXTDOMAIN libintl_textdomain #endif /* Lock variable to protect the global data in the gettext implementation. */ __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) /* Set the current default message catalog to DOMAINNAME. If DOMAINNAME is null, return the current default. If DOMAINNAME is "", reset to the default of "messages". */ char * TEXTDOMAIN (domainname) const char *domainname; { char *new_domain; char *old_domain; /* A NULL pointer requests the current setting. */ if (domainname == NULL) return (char *) _nl_current_default_domain; __libc_rwlock_wrlock (_nl_state_lock); old_domain = (char *) _nl_current_default_domain; /* If domain name is the null string set to default domain "messages". */ if (domainname[0] == '\0' || strcmp (domainname, _nl_default_default_domain) == 0) { _nl_current_default_domain = _nl_default_default_domain; new_domain = (char *) _nl_current_default_domain; } else if (strcmp (domainname, old_domain) == 0) /* This can happen and people will use it to signal that some environment variable changed. */ new_domain = old_domain; else { /* If the following malloc fails `_nl_current_default_domain' will be NULL. This value will be returned and so signals we are out of core. */ #if defined _LIBC || defined HAVE_STRDUP new_domain = strdup (domainname); #else size_t len = strlen (domainname) + 1; new_domain = (char *) malloc (len); if (new_domain != NULL) memcpy (new_domain, domainname, len); #endif if (new_domain != NULL) _nl_current_default_domain = new_domain; } /* We use this possibility to signal a change of the loaded catalogs since this is most likely the case and there is no other easy we to do it. Do it only when the call was successful. */ if (new_domain != NULL) { ++_nl_msg_cat_cntr; if (old_domain != new_domain && old_domain != _nl_default_default_domain) free (old_domain); } __libc_rwlock_unlock (_nl_state_lock); return new_domain; } #ifdef _LIBC /* Alias for function name in GNU C Library. */ weak_alias (__textdomain, textdomain); #endif |