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b8ec72d947
2004-03-07 Ulrich Drepper <drepper@redhat.com> * idn-stub.c: Include <gnu/lib-names.h>. Use LIBCIDN_SO for dlopen. * shlib-versions: New file. * toutf8.c: Include <sys/param.h>.
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/* idn-stub.c --- Stub to dlopen libcidn.so and invoke idna_to_ascii_lz.
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* Copyright (C) 2003, 2004 Simon Josefsson
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*
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* This file is part of GNU Libidn.
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*
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* GNU Libidn is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* GNU Libidn is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with GNU Libidn; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <dlfcn.h>
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#include <gnu/lib-names.h>
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#include <bits/libc-lock.h>
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/* Get specification for idna_to_ascii_lz. */
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#include "idna.h"
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/* Handle of the libidn DSO. */
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static void *h;
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/* Stub to dlopen libcidn.so and invoke the real idna_to_ascii_lz, or
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return IDNA_DLOPEN_ERROR on failure. */
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int
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__idna_to_ascii_lz (const char *input, char **output, int flags)
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{
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/* If the input string contains no non-ASCII character the output
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string will be the same. No valid locale encoding does not have
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this property. */
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const char *cp = input;
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while (*cp != '\0' && isascii (*cp))
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++cp;
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if (*cp == '\0')
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{
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*output = strdup (input);
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return *output == NULL ? IDNA_MALLOC_ERROR : IDNA_SUCCESS;
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}
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static int (*to_ascii_lz) (const char *input, char **output, int flags);
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if (h == NULL)
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{
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__libc_lock_define_initialized (static, lock);
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__libc_lock_lock (lock);
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/* Retest in case some other thread arrived here at the same time. */
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if (h == NULL)
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{
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h = __libc_dlopen (LIBCIDN_SO);
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if (h == NULL)
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h = (void *) 1l;
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else
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{
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/* Get the function we are interested in. */
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to_ascii_lz = __libc_dlsym (h, "idna_to_ascii_lz");
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if (to_ascii_lz == NULL)
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{
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__libc_dlclose (h);
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h = (void *) 1l;
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}
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}
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}
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__libc_lock_unlock (lock);
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}
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if (h == (void *) 1l)
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return IDNA_DLOPEN_ERROR;
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return to_ascii_lz (input, output, flags);
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}
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libc_freeres_fn (unload_libidn)
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{
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if (h != NULL && h != (void *) 1l)
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{
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__libc_dlclose (h);
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h = (void *) 1l;
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}
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}
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