301 lines
8.5 KiB
C
301 lines
8.5 KiB
C
/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
|
|
|
|
The GNU C Library 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.
|
|
|
|
The GNU C Library 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 the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <ctype.h>
|
|
#include <langinfo.h>
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <locale/localeinfo.h>
|
|
#include <wcsmbsload.h>
|
|
#include <bits/libc-lock.h>
|
|
#include <iconv/gconv_int.h>
|
|
|
|
|
|
/* Last loaded locale for LC_CTYPE. We initialize for the C locale
|
|
which is enabled at startup. */
|
|
extern const struct locale_data _nl_C_LC_CTYPE;
|
|
const struct locale_data *__wcsmbs_last_locale = &_nl_C_LC_CTYPE;
|
|
|
|
|
|
/* These are the descriptions for the default conversion functions. */
|
|
static struct __gconv_step to_wc =
|
|
{
|
|
.__shlib_handle = NULL,
|
|
.__modname = NULL,
|
|
.__counter = INT_MAX,
|
|
.__from_name = (char *) "ANSI_X3.4-1968//TRANSLIT",
|
|
.__to_name = (char *) "INTERNAL",
|
|
.__fct = __gconv_transform_ascii_internal,
|
|
.__init_fct = NULL,
|
|
.__end_fct = NULL,
|
|
.__min_needed_from = 1,
|
|
.__max_needed_from = 1,
|
|
.__min_needed_to = 4,
|
|
.__max_needed_to = 4,
|
|
.__stateful = 0,
|
|
.__data = NULL
|
|
};
|
|
|
|
static struct __gconv_step to_mb =
|
|
{
|
|
.__shlib_handle = NULL,
|
|
.__modname = NULL,
|
|
.__counter = INT_MAX,
|
|
.__from_name = (char *) "INTERNAL",
|
|
.__to_name = (char *) "ANSI_X3.4-1968//TRANSLIT",
|
|
.__fct = __gconv_transform_internal_ascii,
|
|
.__init_fct = NULL,
|
|
.__end_fct = NULL,
|
|
.__min_needed_from = 4,
|
|
.__max_needed_from = 4,
|
|
.__min_needed_to = 1,
|
|
.__max_needed_to = 1,
|
|
.__stateful = 0,
|
|
.__data = NULL
|
|
};
|
|
|
|
|
|
/* For the default locale we only have to handle ANSI_X3.4-1968. */
|
|
struct gconv_fcts __wcsmbs_gconv_fcts =
|
|
{
|
|
.towc = &to_wc,
|
|
.towc_nsteps = 1,
|
|
.tomb = &to_mb,
|
|
.tomb_nsteps = 1
|
|
};
|
|
|
|
|
|
static inline struct __gconv_step *
|
|
getfct (const char *to, const char *from, size_t *nstepsp)
|
|
{
|
|
size_t nsteps;
|
|
struct __gconv_step *result;
|
|
#if 0
|
|
size_t nstateful;
|
|
size_t cnt;
|
|
#endif
|
|
|
|
if (__gconv_find_transform (to, from, &result, &nsteps, 0) != __GCONV_OK)
|
|
/* Loading the conversion step is not possible. */
|
|
return NULL;
|
|
|
|
/* Maybe it is someday necessary to allow more than one step.
|
|
Currently this is not the case since the conversions handled here
|
|
are from and to INTERNAL and there always is a converted for
|
|
that. It the directly following code is enabled the libio
|
|
functions will have to allocate appropriate __gconv_step_data
|
|
elements instead of only one. */
|
|
#if 0
|
|
/* Count the number of stateful conversions. Since we will only
|
|
have one 'mbstate_t' object available we can only deal with one
|
|
stateful conversion. */
|
|
nstateful = 0;
|
|
for (cnt = 0; cnt < nsteps; ++cnt)
|
|
if (result[cnt].__stateful)
|
|
++nstateful;
|
|
if (nstateful > 1)
|
|
#else
|
|
if (nsteps > 1)
|
|
#endif
|
|
{
|
|
/* We cannot handle this case. */
|
|
__gconv_close_transform (result, nsteps);
|
|
result = NULL;
|
|
}
|
|
else
|
|
*nstepsp = nsteps;
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Extract from the given locale name the character set portion. Since
|
|
only the XPG form of the name includes this information we don't have
|
|
to take care for the CEN form. */
|
|
#define extract_charset_name(str) \
|
|
({ \
|
|
const char *cp = str; \
|
|
char *result = NULL; \
|
|
\
|
|
cp += strcspn (cp, "@.+,"); \
|
|
if (*cp == '.') \
|
|
{ \
|
|
const char *endp = ++cp; \
|
|
while (*endp != '\0' && *endp != '@') \
|
|
++endp; \
|
|
if (endp != cp) \
|
|
result = strndupa (cp, endp - cp); \
|
|
} \
|
|
result; \
|
|
})
|
|
|
|
|
|
/* We must modify global data. */
|
|
__libc_lock_define_initialized (static, lock)
|
|
|
|
|
|
/* Load conversion functions for the currently selected locale. */
|
|
void
|
|
internal_function
|
|
__wcsmbs_load_conv (const struct locale_data *new_category)
|
|
{
|
|
/* Acquire the lock. */
|
|
__libc_lock_lock (lock);
|
|
|
|
/* We should repeat the test since while we waited some other thread
|
|
might have run this function. */
|
|
if (__builtin_expect (__wcsmbs_last_locale != new_category, 1))
|
|
{
|
|
if (new_category->name == _nl_C_name) /* Yes, pointer comparison. */
|
|
{
|
|
failed:
|
|
__wcsmbs_gconv_fcts.towc = &to_wc;
|
|
__wcsmbs_gconv_fcts.tomb = &to_mb;
|
|
}
|
|
else
|
|
{
|
|
/* We must find the real functions. */
|
|
const char *charset_name;
|
|
const char *complete_name;
|
|
struct __gconv_step *new_towc;
|
|
size_t new_towc_nsteps;
|
|
struct __gconv_step *new_tomb;
|
|
size_t new_tomb_nsteps;
|
|
int use_translit;
|
|
|
|
/* Free the old conversions. */
|
|
if (__wcsmbs_gconv_fcts.tomb != &to_mb)
|
|
__gconv_close_transform (__wcsmbs_gconv_fcts.tomb,
|
|
__wcsmbs_gconv_fcts.tomb_nsteps);
|
|
if (__wcsmbs_gconv_fcts.towc != &to_wc)
|
|
__gconv_close_transform (__wcsmbs_gconv_fcts.towc,
|
|
__wcsmbs_gconv_fcts.towc_nsteps);
|
|
|
|
/* Get name of charset of the locale. */
|
|
charset_name = new_category->values[_NL_ITEM_INDEX(CODESET)].string;
|
|
|
|
/* Does the user want transliteration? */
|
|
use_translit = new_category->use_translit;
|
|
|
|
/* Normalize the name and add the slashes necessary for a
|
|
complete lookup. */
|
|
complete_name = norm_add_slashes (charset_name,
|
|
use_translit ? "TRANSLIT" : NULL);
|
|
|
|
/* It is not necessary to use transliteration in this direction
|
|
since the internal character set is supposed to be able to
|
|
represent all others. */
|
|
new_towc = getfct ("INTERNAL", complete_name, &new_towc_nsteps);
|
|
new_tomb = (new_towc != NULL
|
|
? getfct (complete_name, "INTERNAL", &new_tomb_nsteps)
|
|
: NULL);
|
|
|
|
/* If any of the conversion functions is not available we don't
|
|
use any since this would mean we cannot convert back and
|
|
forth.*/
|
|
if (new_towc == NULL || new_tomb == NULL)
|
|
{
|
|
if (new_towc != NULL)
|
|
__gconv_close_transform (new_towc, 1);
|
|
|
|
goto failed;
|
|
}
|
|
|
|
__wcsmbs_gconv_fcts.tomb = new_tomb;
|
|
__wcsmbs_gconv_fcts.tomb_nsteps = new_tomb_nsteps;
|
|
__wcsmbs_gconv_fcts.towc = new_towc;
|
|
__wcsmbs_gconv_fcts.towc_nsteps = new_towc_nsteps;
|
|
}
|
|
|
|
/* Set last-used variable for current locale. */
|
|
__wcsmbs_last_locale = new_category;
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
}
|
|
|
|
|
|
/* Clone the current conversion function set. */
|
|
void
|
|
internal_function
|
|
__wcsmbs_clone_conv (struct gconv_fcts *copy)
|
|
{
|
|
/* First make sure the function table is up-to-date. */
|
|
update_conversion_ptrs ();
|
|
|
|
/* Make sure the data structures remain the same until we are finished. */
|
|
__libc_lock_lock (lock);
|
|
|
|
/* Copy the data. */
|
|
*copy = __wcsmbs_gconv_fcts;
|
|
|
|
/* Now increment the usage counters. */
|
|
if (copy->towc->__shlib_handle != NULL)
|
|
++copy->towc->__counter;
|
|
if (copy->tomb->__shlib_handle != NULL)
|
|
++copy->tomb->__counter;
|
|
|
|
__libc_lock_unlock (lock);
|
|
}
|
|
|
|
|
|
/* Get converters for named charset. */
|
|
int
|
|
internal_function
|
|
__wcsmbs_named_conv (struct gconv_fcts *copy, const char *name)
|
|
{
|
|
copy->towc = getfct ("INTERNAL", name, ©->towc_nsteps);
|
|
if (copy->towc != NULL)
|
|
{
|
|
copy->tomb = getfct (name, "INTERNAL", ©->tomb_nsteps);
|
|
if (copy->tomb == NULL)
|
|
__gconv_close_transform (copy->towc, copy->towc_nsteps);
|
|
}
|
|
|
|
return copy->towc == NULL || copy->tomb == NULL ? 1 : 0;
|
|
}
|
|
|
|
|
|
/* Free all resources if necessary. */
|
|
static void __attribute__ ((unused))
|
|
free_mem (void)
|
|
{
|
|
if (__wcsmbs_gconv_fcts.tomb != &to_mb)
|
|
{
|
|
struct __gconv_step *old = __wcsmbs_gconv_fcts.tomb;
|
|
size_t nold = __wcsmbs_gconv_fcts.tomb_nsteps;
|
|
__wcsmbs_gconv_fcts.tomb = &to_mb;
|
|
__wcsmbs_gconv_fcts.tomb_nsteps = 1;
|
|
__gconv_release_cache (old, nold);
|
|
}
|
|
|
|
if (__wcsmbs_gconv_fcts.towc != &to_wc)
|
|
{
|
|
struct __gconv_step *old = __wcsmbs_gconv_fcts.towc;
|
|
size_t nold = __wcsmbs_gconv_fcts.towc_nsteps;
|
|
__wcsmbs_gconv_fcts.towc = &to_wc;
|
|
__wcsmbs_gconv_fcts.towc_nsteps = 1;
|
|
__gconv_release_cache (old, nold);
|
|
}
|
|
}
|
|
|
|
text_set_element (__libc_subfreeres, free_mem);
|