mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 03:10:05 +00:00
2c03b6db26
2004-10-05 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h: Include dl-sysdep.h. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise.
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/* idn-stub.c --- Stub to dlopen libcidn.so and invoke idna_to_ascii_lz.
|
|
* Copyright (C) 2003, 2004 Simon Josefsson
|
|
*
|
|
* This file is part of GNU Libidn.
|
|
*
|
|
* GNU Libidn is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* GNU Libidn 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with GNU Libidn; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <dlfcn.h>
|
|
#include <gnu/lib-names.h>
|
|
#include <bits/libc-lock.h>
|
|
|
|
/* Get specification for idna_to_ascii_lz. */
|
|
#include "idna.h"
|
|
|
|
/* Handle of the libidn DSO. */
|
|
static void *h;
|
|
|
|
|
|
static int (*to_ascii_lz) (const char *input, char **output, int flags);
|
|
static int (*to_unicode_lzlz) (const char *input, char **output, int flags);
|
|
|
|
|
|
static void
|
|
load_dso (void)
|
|
{
|
|
/* Lock protecting the DSO loading. */
|
|
__libc_lock_define_initialized (static, lock);
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
/* Retest in case some other thread arrived here at the same time. */
|
|
if (h == NULL)
|
|
{
|
|
h = __libc_dlopen (LIBCIDN_SO);
|
|
|
|
if (h == NULL)
|
|
h = (void *) 1l;
|
|
else
|
|
{
|
|
/* Get the function we are interested in. */
|
|
to_ascii_lz = __libc_dlsym (h, "idna_to_ascii_lz");
|
|
to_unicode_lzlz = __libc_dlsym (h, "idna_to_unicode_lzlz");
|
|
if (to_ascii_lz == NULL || to_unicode_lzlz == NULL)
|
|
{
|
|
__libc_dlclose (h);
|
|
h = (void *) 1l;
|
|
}
|
|
}
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
}
|
|
|
|
|
|
/* Stub to dlopen libcidn.so and invoke the real idna_to_ascii_lz, or
|
|
return IDNA_DLOPEN_ERROR on failure. */
|
|
int
|
|
__idna_to_unicode_lzlz (const char *input, char **output, int flags)
|
|
{
|
|
/* If the input string contains no "xn--" prefix for a component of
|
|
the name we can pass it up right away. */
|
|
const char *cp = input;
|
|
while (*cp != '\0')
|
|
{
|
|
if (strncmp (cp, IDNA_ACE_PREFIX, strlen (IDNA_ACE_PREFIX)) == 0)
|
|
break;
|
|
|
|
/* On to the next part of the name. */
|
|
cp = __strchrnul (cp, '.');
|
|
if (*cp == '.')
|
|
++cp;
|
|
}
|
|
|
|
if (*cp == '\0')
|
|
{
|
|
*output = (char *) input;
|
|
return IDNA_SUCCESS;
|
|
}
|
|
|
|
if (h == NULL)
|
|
load_dso ();
|
|
|
|
if (h == (void *) 1l)
|
|
return IDNA_DLOPEN_ERROR;
|
|
|
|
return to_unicode_lzlz (input, output, flags);
|
|
}
|
|
|
|
|
|
/* Stub to dlopen libcidn.so and invoke the real idna_to_ascii_lz, or
|
|
return IDNA_DLOPEN_ERROR on failure. */
|
|
int
|
|
__idna_to_ascii_lz (const char *input, char **output, int flags)
|
|
{
|
|
/* If the input string contains no non-ASCII character the output
|
|
string will be the same. No valid locale encoding does not have
|
|
this property. */
|
|
const char *cp = input;
|
|
while (*cp != '\0' && isascii (*cp))
|
|
++cp;
|
|
|
|
if (*cp == '\0')
|
|
{
|
|
*output = (char *) input;
|
|
return IDNA_SUCCESS;
|
|
}
|
|
|
|
if (h == NULL)
|
|
load_dso ();
|
|
|
|
if (h == (void *) 1l)
|
|
return IDNA_DLOPEN_ERROR;
|
|
|
|
return to_ascii_lz (input, output, flags);
|
|
}
|
|
|
|
|
|
#ifndef NOT_IN_libc
|
|
libc_freeres_fn (unload_libidn)
|
|
{
|
|
if (h != NULL && h != (void *) 1l)
|
|
{
|
|
__libc_dlclose (h);
|
|
h = (void *) 1l;
|
|
}
|
|
}
|
|
#endif
|