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/* Implementation of the bindtextdomain(3) function
Copyright (C) 1995-1998, 2000-2003, 2005-2006, 2008 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "gettextP.h"
#ifdef _LIBC
# include <libintl.h>
#else
# include "libgnuintl.h"
#endif
/* Handle multi-threaded applications. */
#ifdef _LIBC
# include <bits/libc-lock.h>
# define gl_rwlock_define __libc_rwlock_define
# define gl_rwlock_wrlock __libc_rwlock_wrlock
# define gl_rwlock_unlock __libc_rwlock_unlock
#else
# include "lock.h"
#endif
/* Some compilers, like SunOS4 cc, don't have offsetof in <stddef.h>. */
#ifndef offsetof
# define offsetof(type,ident) ((size_t)&(((type*)0)->ident))
#endif
/* @@ end of prolog @@ */
/* Lock variable to protect the global data in the gettext implementation. */
gl_rwlock_define (extern, _nl_state_lock 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 BINDTEXTDOMAIN __bindtextdomain
# define BIND_TEXTDOMAIN_CODESET __bind_textdomain_codeset
# ifndef strdup
# define strdup(str) __strdup (str)
# endif
#else
# define BINDTEXTDOMAIN libintl_bindtextdomain
# define BIND_TEXTDOMAIN_CODESET libintl_bind_textdomain_codeset
#endif
/* Specifies the directory name *DIRNAMEP and the output codeset *CODESETP
to be used for the DOMAINNAME message catalog.
If *DIRNAMEP or *CODESETP is NULL, the corresponding attribute is not
modified, only the current value is returned.
If DIRNAMEP or CODESETP is NULL, the corresponding attribute is neither
modified nor returned. */
static void
set_binding_values (const char *domainname,
const char **dirnamep, const char **codesetp)
{
struct binding *binding;
int modified;
/* Some sanity checks. */
if (domainname == NULL || domainname[0] == '\0')
{
if (dirnamep)
*dirnamep = NULL;
if (codesetp)
*codesetp = NULL;
return;
}
gl_rwlock_wrlock (_nl_state_lock);
modified = 0;
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)
{
if (dirnamep)
{
const char *dirname = *dirnamep;
if (dirname == NULL)
/* The current binding has be to returned. */
*dirnamep = binding->dirname;
else
{
/* The domain is already bound. If the new value and the old
one are equal we simply do nothing. Otherwise replace the
old binding. */
char *result = binding->dirname;
if (strcmp (dirname, result) != 0)
{
if (strcmp (dirname, _nl_default_dirname) == 0)
result = (char *) _nl_default_dirname;
else
{
#if defined _LIBC || defined HAVE_STRDUP
result = strdup (dirname);
#else
size_t len = strlen (dirname) + 1;
result = (char *) malloc (len);
if (__builtin_expect (result != NULL, 1))
memcpy (result, dirname, len);
#endif
}
if (__builtin_expect (result != NULL, 1))
{
if (binding->dirname != _nl_default_dirname)
free (binding->dirname);
binding->dirname = result;
modified = 1;
}
}
*dirnamep = result;
}
}
if (codesetp)
{
const char *codeset = *codesetp;
if (codeset == NULL)
/* The current binding has be to returned. */
*codesetp = binding->codeset;
else
{
/* The domain is already bound. If the new value and the old
one are equal we simply do nothing. Otherwise replace the
old binding. */
char *result = binding->codeset;
if (result == NULL || strcmp (codeset, result) != 0)
{
#if defined _LIBC || defined HAVE_STRDUP
result = strdup (codeset);
#else
size_t len = strlen (codeset) + 1;
result = (char *) malloc (len);
if (__builtin_expect (result != NULL, 1))
memcpy (result, codeset, len);
#endif
if (__builtin_expect (result != NULL, 1))
{
free (binding->codeset);
binding->codeset = result;
modified = 1;
}
}
*codesetp = result;
}
}
}
else if ((dirnamep == NULL || *dirnamep == NULL)
&& (codesetp == NULL || *codesetp == NULL))
{
/* Simply return the default values. */
if (dirnamep)
*dirnamep = _nl_default_dirname;
if (codesetp)
*codesetp = NULL;
}
else
{
/* We have to create a new binding. */
size_t len = strlen (domainname) + 1;
struct binding *new_binding =
(struct binding *) malloc (offsetof (struct binding, domainname) + len);
if (__builtin_expect (new_binding == NULL, 0))
goto failed;
memcpy (new_binding->domainname, domainname, len);
if (dirnamep)
{
const char *dirname = *dirnamep;
if (dirname == NULL)
/* The default value. */
dirname = _nl_default_dirname;
else
{
if (strcmp (dirname, _nl_default_dirname) == 0)
dirname = _nl_default_dirname;
else
{
char *result;
#if defined _LIBC || defined HAVE_STRDUP
result = strdup (dirname);
if (__builtin_expect (result == NULL, 0))
goto failed_dirname;
#else
size_t len = strlen (dirname) + 1;
result = (char *) malloc (len);
if (__builtin_expect (result == NULL, 0))
goto failed_dirname;
memcpy (result, dirname, len);
#endif
dirname = result;
}
}
*dirnamep = dirname;
new_binding->dirname = (char *) dirname;
}
else
/* The default value. */
new_binding->dirname = (char *) _nl_default_dirname;
if (codesetp)
{
const char *codeset = *codesetp;
if (codeset != NULL)
{
char *result;
#if defined _LIBC || defined HAVE_STRDUP
result = strdup (codeset);
if (__builtin_expect (result == NULL, 0))
goto failed_codeset;
#else
size_t len = strlen (codeset) + 1;
result = (char *) malloc (len);
if (__builtin_expect (result == NULL, 0))
goto failed_codeset;
memcpy (result, codeset, len);
#endif
codeset = result;
}
*codesetp = codeset;
new_binding->codeset = (char *) codeset;
}
else
new_binding->codeset = NULL;
/* Now enqueue it. */
if (_nl_domain_bindings == NULL
|| strcmp (domainname, _nl_domain_bindings->domainname) < 0)
{
new_binding->next = _nl_domain_bindings;
_nl_domain_bindings = new_binding;
}
else
{
binding = _nl_domain_bindings;
while (binding->next != NULL
&& strcmp (domainname, binding->next->domainname) > 0)
binding = binding->next;
new_binding->next = binding->next;
binding->next = new_binding;
}
modified = 1;
/* Here we deal with memory allocation failures. */
if (0)
{
failed_codeset:
if (new_binding->dirname != _nl_default_dirname)
free (new_binding->dirname);
failed_dirname:
free (new_binding);
failed:
if (dirnamep)
*dirnamep = NULL;
if (codesetp)
*codesetp = NULL;
}
}
/* If we modified any binding, we flush the caches. */
if (modified)
++_nl_msg_cat_cntr;
gl_rwlock_unlock (_nl_state_lock);
}
/* Specify that the DOMAINNAME message catalog will be found
in DIRNAME rather than in the system locale data base. */
char *
BINDTEXTDOMAIN (const char *domainname, const char *dirname)
{
set_binding_values (domainname, &dirname, NULL);
return (char *) dirname;
}
/* Specify the character encoding in which the messages from the
DOMAINNAME message catalog will be returned. */
char *
BIND_TEXTDOMAIN_CODESET (const char *domainname, const char *codeset)
{
set_binding_values (domainname, NULL, &codeset);
return (char *) codeset;
}
#ifdef _LIBC
/* Aliases for function names in GNU C Library. */
weak_alias (__bindtextdomain, bindtextdomain);
weak_alias (__bind_textdomain_codeset, bind_textdomain_codeset);
#endif
