diff options
Diffstat (limited to 'REORG.TODO/libidn/idn-stub.c')
| -rw-r--r-- | REORG.TODO/libidn/idn-stub.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/REORG.TODO/libidn/idn-stub.c b/REORG.TODO/libidn/idn-stub.c new file mode 100644 index 0000000000..fb67f74b8d --- /dev/null +++ b/REORG.TODO/libidn/idn-stub.c @@ -0,0 +1,142 @@ +/* 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, see <http://www.gnu.org/licenses/>. + */ + +#include <ctype.h> +#include <stdio.h> +#include <string.h> +#include <dlfcn.h> +#include <gnu/lib-names.h> +#include <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); +} + + +#if IS_IN (libc) +libc_freeres_fn (unload_libidn) +{ + if (h != NULL && h != (void *) 1l) + { + __libc_dlclose (h); + h = (void *) 1l; + } +} +#endif |