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Implement __idna_to_unicode_lzlz. Split __idna_to_ascii_lz in two parts so that loading can be shared with the new function.

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This commit is contained in:
Ulrich Drepper 2004-03-13 06:47:49 +00:00
parent dacf785541
commit 4be2c5fcd8
1 changed files with 74 additions and 30 deletions
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104
libidn/idn-stub.c
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@ -33,6 +33,77 @@
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
@ -47,39 +118,12 @@ __idna_to_ascii_lz (const char *input, char **output, int flags)
if (*cp == '\0')
{
*output = strdup (input);
return *output == NULL ? IDNA_MALLOC_ERROR : IDNA_SUCCESS;
*output = (char *) input;
return IDNA_SUCCESS;
}
static int (*to_ascii_lz) (const char *input, char **output, int flags);
if (h == NULL)
{
__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");
if (to_ascii_lz == NULL)
{
__libc_dlclose (h);
h = (void *) 1l;
}
}
}
__libc_lock_unlock (lock);
}
load_dso ();
if (h == (void *) 1l)
return IDNA_DLOPEN_ERROR;