| 1 | /* Implementation of the textdomain(3) function. |
| 2 | Copyright (C) 1995-1998, 2000, 2001, 2002 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
| 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 (domainname) |
| 81 | const char *domainname; |
| 82 | { |
| 83 | char *new_domain; |
| 84 | char *old_domain; |
| 85 | |
| 86 | /* A NULL pointer requests the current setting. */ |
| 87 | if (domainname == NULL) |
| 88 | return (char *) _nl_current_default_domain; |
| 89 | |
| 90 | __libc_rwlock_wrlock (_nl_state_lock); |
| 91 | |
| 92 | old_domain = (char *) _nl_current_default_domain; |
| 93 | |
| 94 | /* If domain name is the null string set to default domain "messages". */ |
| 95 | if (domainname[0] == '\0' |
| 96 | || strcmp (domainname, _nl_default_default_domain) == 0) |
| 97 | { |
| 98 | _nl_current_default_domain = _nl_default_default_domain; |
| 99 | new_domain = (char *) _nl_current_default_domain; |
| 100 | } |
| 101 | else if (strcmp (domainname, old_domain) == 0) |
| 102 | /* This can happen and people will use it to signal that some |
| 103 | environment variable changed. */ |
| 104 | new_domain = old_domain; |
| 105 | else |
| 106 | { |
| 107 | /* If the following malloc fails `_nl_current_default_domain' |
| 108 | will be NULL. This value will be returned and so signals we |
| 109 | are out of core. */ |
| 110 | #if defined _LIBC || defined HAVE_STRDUP |
| 111 | new_domain = strdup (domainname); |
| 112 | #else |
| 113 | size_t len = strlen (domainname) + 1; |
| 114 | new_domain = (char *) malloc (len); |
| 115 | if (new_domain != NULL) |
| 116 | memcpy (new_domain, domainname, len); |
| 117 | #endif |
| 118 | |
| 119 | if (new_domain != NULL) |
| 120 | _nl_current_default_domain = new_domain; |
| 121 | } |
| 122 | |
| 123 | /* We use this possibility to signal a change of the loaded catalogs |
| 124 | since this is most likely the case and there is no other easy we |
| 125 | to do it. Do it only when the call was successful. */ |
| 126 | if (new_domain != NULL) |
| 127 | { |
| 128 | ++_nl_msg_cat_cntr; |
| 129 | |
| 130 | if (old_domain != new_domain && old_domain != _nl_default_default_domain) |
| 131 | free (old_domain); |
| 132 | } |
| 133 | |
| 134 | __libc_rwlock_unlock (_nl_state_lock); |
| 135 | |
| 136 | return new_domain; |
| 137 | } |
| 138 | |
| 139 | #ifdef _LIBC |
| 140 | /* Alias for function name in GNU C Library. */ |
| 141 | weak_alias (__textdomain, textdomain); |
| 142 | #endif |