1 /* Implementation of the textdomain(3) function. 2 Copyright (C) 1995-1998, 2000-2003 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 <stdlib.h> 24 #include <string.h> 25 26 #ifdef _LIBC 27 # include <libintl.h> 28 #else 29 # include "libgnuintl.h" 30 #endif 31 #include "gettextP.h" 32 33 #ifdef _LIBC 34 /* We have to handle multi-threaded applications. */ 35 # include <bits/libc-lock.h> 36 #else 37 /* Provide dummy implementation if this is outside glibc. */ 38 # define __libc_rwlock_define(CLASS, NAME) 39 # define __libc_rwlock_wrlock(NAME) 40 # define __libc_rwlock_unlock(NAME) 41 #endif 42 43 /* The internal variables in the standalone libintl.a must have different 44 names than the internal variables in GNU libc, otherwise programs 45 using libintl.a cannot be linked statically. */ 46 #if !defined _LIBC 47 # define _nl_default_default_domain libintl_nl_default_default_domain 48 # define _nl_current_default_domain libintl_nl_current_default_domain 49 #endif 50 51 /* @@ end of prolog @@ */ 52 53 /* Name of the default text domain. */ 54 extern const char _nl_default_default_domain[] attribute_hidden; 55 56 /* Default text domain in which entries for gettext(3) are to be found. */ 57 extern const char *_nl_current_default_domain attribute_hidden; 58 59 60 /* Names for the libintl functions are a problem. They must not clash 61 with existing names and they should follow ANSI C. But this source 62 code is also used in GNU C Library where the names have a __ 63 prefix. So we have to make a difference here. */ 64 #ifdef _LIBC 65 # define TEXTDOMAIN __textdomain 66 # ifndef strdup 67 # define strdup(str) __strdup (str) 68 # endif 69 #else 70 # define TEXTDOMAIN libintl_textdomain 71 #endif 72 73 /* Lock variable to protect the global data in the gettext implementation. */ 74 __libc_rwlock_define (extern, _nl_state_lock attribute_hidden) 75 76 /* Set the current default message catalog to DOMAINNAME. 77 If DOMAINNAME is null, return the current default. 78 If DOMAINNAME is "", reset to the default of "messages". */ 79 char * 80 TEXTDOMAIN (const char *domainname) 81 { 82 char *new_domain; 83 char *old_domain; 84 85 /* A NULL pointer requests the current setting. */ 86 if (domainname == NULL) 87 return (char *) _nl_current_default_domain; 88 89 __libc_rwlock_wrlock (_nl_state_lock); 90 91 old_domain = (char *) _nl_current_default_domain; 92 93 /* If domain name is the null string set to default domain "messages". */ 94 if (domainname[0] == '\0' 95 || strcmp (domainname, _nl_default_default_domain) == 0) 96 { 97 _nl_current_default_domain = _nl_default_default_domain; 98 new_domain = (char *) _nl_current_default_domain; 99 } 100 else if (strcmp (domainname, old_domain) == 0) 101 /* This can happen and people will use it to signal that some 102 environment variable changed. */ 103 new_domain = old_domain; 104 else 105 { 106 /* If the following malloc fails `_nl_current_default_domain' 107 will be NULL. This value will be returned and so signals we 108 are out of core. */ 109 #if defined _LIBC || defined HAVE_STRDUP 110 new_domain = strdup (domainname); 111 #else 112 size_t len = strlen (domainname) + 1; 113 new_domain = (char *) malloc (len); 114 if (new_domain != NULL) 115 memcpy (new_domain, domainname, len); 116 #endif 117 118 if (new_domain != NULL) 119 _nl_current_default_domain = new_domain; 120 } 121 122 /* We use this possibility to signal a change of the loaded catalogs 123 since this is most likely the case and there is no other easy we 124 to do it. Do it only when the call was successful. */ 125 if (new_domain != NULL) 126 { 127 ++_nl_msg_cat_cntr; 128 129 if (old_domain != new_domain && old_domain != _nl_default_default_domain) 130 free (old_domain); 131 } 132 133 __libc_rwlock_unlock (_nl_state_lock); 134 135 return new_domain; 136 } 137 138 #ifdef _LIBC 139 /* Alias for function name in GNU C Library. */ 140 weak_alias (__textdomain, textdomain); 141 #endif 142
