1*2a6b7db3Sskrll /* Implementation of the textdomain(3) function. 2*2a6b7db3Sskrll Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc. 3*2a6b7db3Sskrll 4*2a6b7db3Sskrll This program is free software; you can redistribute it and/or modify it 5*2a6b7db3Sskrll under the terms of the GNU Library General Public License as published 6*2a6b7db3Sskrll by the Free Software Foundation; either version 2, or (at your option) 7*2a6b7db3Sskrll any later version. 8*2a6b7db3Sskrll 9*2a6b7db3Sskrll This program is distributed in the hope that it will be useful, 10*2a6b7db3Sskrll but WITHOUT ANY WARRANTY; without even the implied warranty of 11*2a6b7db3Sskrll MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12*2a6b7db3Sskrll Library General Public License for more details. 13*2a6b7db3Sskrll 14*2a6b7db3Sskrll You should have received a copy of the GNU Library General Public 15*2a6b7db3Sskrll License along with this program; if not, write to the Free Software 16*2a6b7db3Sskrll Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 17*2a6b7db3Sskrll USA. */ 18*2a6b7db3Sskrll 19*2a6b7db3Sskrll #ifdef HAVE_CONFIG_H 20*2a6b7db3Sskrll # include <config.h> 21*2a6b7db3Sskrll #endif 22*2a6b7db3Sskrll 23*2a6b7db3Sskrll #include <stdlib.h> 24*2a6b7db3Sskrll #include <string.h> 25*2a6b7db3Sskrll 26*2a6b7db3Sskrll #ifdef _LIBC 27*2a6b7db3Sskrll # include <libintl.h> 28*2a6b7db3Sskrll #else 29*2a6b7db3Sskrll # include "libgnuintl.h" 30*2a6b7db3Sskrll #endif 31*2a6b7db3Sskrll #include "gettextP.h" 32*2a6b7db3Sskrll 33*2a6b7db3Sskrll #ifdef _LIBC 34*2a6b7db3Sskrll /* We have to handle multi-threaded applications. */ 35*2a6b7db3Sskrll # include <bits/libc-lock.h> 36*2a6b7db3Sskrll #else 37*2a6b7db3Sskrll /* Provide dummy implementation if this is outside glibc. */ 38*2a6b7db3Sskrll # define __libc_rwlock_define(CLASS, NAME) 39*2a6b7db3Sskrll # define __libc_rwlock_wrlock(NAME) 40*2a6b7db3Sskrll # define __libc_rwlock_unlock(NAME) 41*2a6b7db3Sskrll #endif 42*2a6b7db3Sskrll 43*2a6b7db3Sskrll /* The internal variables in the standalone libintl.a must have different 44*2a6b7db3Sskrll names than the internal variables in GNU libc, otherwise programs 45*2a6b7db3Sskrll using libintl.a cannot be linked statically. */ 46*2a6b7db3Sskrll #if !defined _LIBC 47*2a6b7db3Sskrll # define _nl_default_default_domain libintl_nl_default_default_domain 48*2a6b7db3Sskrll # define _nl_current_default_domain libintl_nl_current_default_domain 49*2a6b7db3Sskrll #endif 50*2a6b7db3Sskrll 51*2a6b7db3Sskrll /* @@ end of prolog @@ */ 52*2a6b7db3Sskrll 53*2a6b7db3Sskrll /* Name of the default text domain. */ 54*2a6b7db3Sskrll extern const char _nl_default_default_domain[] attribute_hidden; 55*2a6b7db3Sskrll 56*2a6b7db3Sskrll /* Default text domain in which entries for gettext(3) are to be found. */ 57*2a6b7db3Sskrll extern const char *_nl_current_default_domain attribute_hidden; 58*2a6b7db3Sskrll 59*2a6b7db3Sskrll 60*2a6b7db3Sskrll /* Names for the libintl functions are a problem. They must not clash 61*2a6b7db3Sskrll with existing names and they should follow ANSI C. But this source 62*2a6b7db3Sskrll code is also used in GNU C Library where the names have a __ 63*2a6b7db3Sskrll prefix. So we have to make a difference here. */ 64*2a6b7db3Sskrll #ifdef _LIBC 65*2a6b7db3Sskrll # define TEXTDOMAIN __textdomain 66*2a6b7db3Sskrll # ifndef strdup 67*2a6b7db3Sskrll # define strdup(str) __strdup (str) 68*2a6b7db3Sskrll # endif 69*2a6b7db3Sskrll #else 70*2a6b7db3Sskrll # define TEXTDOMAIN libintl_textdomain 71*2a6b7db3Sskrll #endif 72*2a6b7db3Sskrll 73*2a6b7db3Sskrll /* Lock variable to protect the global data in the gettext implementation. */ 74*2a6b7db3Sskrll __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) 75*2a6b7db3Sskrll 76*2a6b7db3Sskrll /* Set the current default message catalog to DOMAINNAME. 77*2a6b7db3Sskrll If DOMAINNAME is null, return the current default. 78*2a6b7db3Sskrll If DOMAINNAME is "", reset to the default of "messages". */ 79*2a6b7db3Sskrll char * 80*2a6b7db3Sskrll TEXTDOMAIN (domainname) 81*2a6b7db3Sskrll const char *domainname; 82*2a6b7db3Sskrll { 83*2a6b7db3Sskrll char *new_domain; 84*2a6b7db3Sskrll char *old_domain; 85*2a6b7db3Sskrll 86*2a6b7db3Sskrll /* A NULL pointer requests the current setting. */ 87*2a6b7db3Sskrll if (domainname == NULL) 88*2a6b7db3Sskrll return (char *) _nl_current_default_domain; 89*2a6b7db3Sskrll 90*2a6b7db3Sskrll __libc_rwlock_wrlock (_nl_state_lock); 91*2a6b7db3Sskrll 92*2a6b7db3Sskrll old_domain = (char *) _nl_current_default_domain; 93*2a6b7db3Sskrll 94*2a6b7db3Sskrll /* If domain name is the null string set to default domain "messages". */ 95*2a6b7db3Sskrll if (domainname[0] == '\0' 96*2a6b7db3Sskrll || strcmp (domainname, _nl_default_default_domain) == 0) 97*2a6b7db3Sskrll { 98*2a6b7db3Sskrll _nl_current_default_domain = _nl_default_default_domain; 99*2a6b7db3Sskrll new_domain = (char *) _nl_current_default_domain; 100*2a6b7db3Sskrll } 101*2a6b7db3Sskrll else if (strcmp (domainname, old_domain) == 0) 102*2a6b7db3Sskrll /* This can happen and people will use it to signal that some 103*2a6b7db3Sskrll environment variable changed. */ 104*2a6b7db3Sskrll new_domain = old_domain; 105*2a6b7db3Sskrll else 106*2a6b7db3Sskrll { 107*2a6b7db3Sskrll /* If the following malloc fails `_nl_current_default_domain' 108*2a6b7db3Sskrll will be NULL. This value will be returned and so signals we 109*2a6b7db3Sskrll are out of core. */ 110*2a6b7db3Sskrll #if defined _LIBC || defined HAVE_STRDUP 111*2a6b7db3Sskrll new_domain = strdup (domainname); 112*2a6b7db3Sskrll #else 113*2a6b7db3Sskrll size_t len = strlen (domainname) + 1; 114*2a6b7db3Sskrll new_domain = (char *) malloc (len); 115*2a6b7db3Sskrll if (new_domain != NULL) 116*2a6b7db3Sskrll memcpy (new_domain, domainname, len); 117*2a6b7db3Sskrll #endif 118*2a6b7db3Sskrll 119*2a6b7db3Sskrll if (new_domain != NULL) 120*2a6b7db3Sskrll _nl_current_default_domain = new_domain; 121*2a6b7db3Sskrll } 122*2a6b7db3Sskrll 123*2a6b7db3Sskrll /* We use this possibility to signal a change of the loaded catalogs 124*2a6b7db3Sskrll since this is most likely the case and there is no other easy we 125*2a6b7db3Sskrll to do it. Do it only when the call was successful. */ 126*2a6b7db3Sskrll if (new_domain != NULL) 127*2a6b7db3Sskrll { 128*2a6b7db3Sskrll ++_nl_msg_cat_cntr; 129*2a6b7db3Sskrll 130*2a6b7db3Sskrll if (old_domain != new_domain && old_domain != _nl_default_default_domain) 131*2a6b7db3Sskrll free (old_domain); 132*2a6b7db3Sskrll } 133*2a6b7db3Sskrll 134*2a6b7db3Sskrll __libc_rwlock_unlock (_nl_state_lock); 135*2a6b7db3Sskrll 136*2a6b7db3Sskrll return new_domain; 137*2a6b7db3Sskrll } 138*2a6b7db3Sskrll 139*2a6b7db3Sskrll #ifdef _LIBC 140*2a6b7db3Sskrll /* Alias for function name in GNU C Library. */ 141*2a6b7db3Sskrll weak_alias (__textdomain, textdomain); 142*2a6b7db3Sskrll #endif 143