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/* Copyright (C) 1996-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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The GNU C Library 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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The GNU C Library 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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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <errno.h>
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#include <locale.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef _POSIX_MAPPED_FILES
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# include <sys/mman.h>
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#endif
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#include "localeinfo.h"
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#include "../iconv/gconv_charset.h"
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#include "../iconv/gconv_int.h"
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#ifdef NL_CURRENT_INDIRECT
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# define DEFINE_CATEGORY(category, category_name, items, a) \
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extern struct __locale_data _nl_C_##category; \
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weak_extern (_nl_C_##category)
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# include "categories.def"
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# undef DEFINE_CATEGORY
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/* Array indexed by category of pointers to _nl_C_CATEGORY slots.
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Elements are zero for categories whose data is never used. */
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struct __locale_data *const _nl_C[] attribute_hidden =
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{
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# define DEFINE_CATEGORY(category, category_name, items, a) \
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[category] = &_nl_C_##category,
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# include "categories.def"
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# undef DEFINE_CATEGORY
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};
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#else
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# define _nl_C (_nl_C_locobj.__locales)
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#endif
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/* For each category we keep a list of records for the locale files
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which are somehow addressed. */
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struct loaded_l10nfile *_nl_locale_file_list[__LC_LAST];
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const char _nl_default_locale_path[] attribute_hidden = COMPLOCALEDIR;
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/* Checks if the name is actually present, that is, not NULL and not
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empty. */
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static inline int
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name_present (const char *name)
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{
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return name != NULL && name[0] != '\0';
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}
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/* Checks that the locale name neither extremely long, nor contains a
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".." path component (to prevent directory traversal). */
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static inline int
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valid_locale_name (const char *name)
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{
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/* Not set. */
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size_t namelen = strlen (name);
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/* Name too long. The limit is arbitrary and prevents stack overflow
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issues later. */
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if (__glibc_unlikely (namelen > 255))
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return 0;
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/* Directory traversal attempt. */
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static const char slashdot[4] = {'/', '.', '.', '/'};
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if (__glibc_unlikely (__memmem (name, namelen,
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slashdot, sizeof (slashdot)) != NULL))
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return 0;
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if (namelen == 2 && __glibc_unlikely (name[0] == '.' && name [1] == '.'))
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return 0;
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if (namelen >= 3
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&& __glibc_unlikely (((name[0] == '.'
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&& name[1] == '.'
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&& name[2] == '/')
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|| (name[namelen - 3] == '/'
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&& name[namelen - 2] == '.'
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&& name[namelen - 1] == '.'))))
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return 0;
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/* If there is a slash in the name, it must start with one. */
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if (__glibc_unlikely (memchr (name, '/', namelen) != NULL) && name[0] != '/')
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return 0;
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return 1;
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}
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struct __locale_data *
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_nl_find_locale (const char *locale_path, size_t locale_path_len,
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int category, const char **name)
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{
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int mask;
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/* Name of the locale for this category. */
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const char *cloc_name = *name;
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const char *language;
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const char *modifier;
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const char *territory;
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const char *codeset;
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const char *normalized_codeset;
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struct loaded_l10nfile *locale_file;
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if (cloc_name[0] == '\0')
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{
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/* The user decides which locale to use by setting environment
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variables. */
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cloc_name = getenv ("LC_ALL");
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if (!name_present (cloc_name))
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cloc_name = getenv (_nl_category_names.str
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+ _nl_category_name_idxs[category]);
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if (!name_present (cloc_name))
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cloc_name = getenv ("LANG");
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if (!name_present (cloc_name))
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cloc_name = _nl_C_name;
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}
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/* We used to fall back to the C locale if the name contains a slash
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character '/', but we now check for directory traversal in
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valid_locale_name, so this is no longer necessary. */
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if (__builtin_expect (strcmp (cloc_name, _nl_C_name), 1) == 0
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|| __builtin_expect (strcmp (cloc_name, _nl_POSIX_name), 1) == 0)
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{
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/* We need not load anything. The needed data is contained in
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the library itself. */
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*name = _nl_C_name;
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return _nl_C[category];
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}
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else if (!valid_locale_name (cloc_name))
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{
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__set_errno (EINVAL);
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return NULL;
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}
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*name = cloc_name;
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/* We really have to load some data. First we try the archive,
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but only if there was no LOCPATH environment variable specified. */
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if (__glibc_likely (locale_path == NULL))
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{
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struct __locale_data *data
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= _nl_load_locale_from_archive (category, name);
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if (__glibc_likely (data != NULL))
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return data;
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/* Nothing in the archive with the given name. Expanding it as
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an alias and retry. */
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cloc_name = _nl_expand_alias (*name);
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if (cloc_name != NULL)
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{
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data = _nl_load_locale_from_archive (category, &cloc_name);
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if (__builtin_expect (data != NULL, 1))
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return data;
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}
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/* Nothing in the archive. Set the default path to search below. */
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locale_path = _nl_default_locale_path;
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locale_path_len = sizeof _nl_default_locale_path;
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}
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else
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/* We really have to load some data. First see whether the name is
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an alias. Please note that this makes it impossible to have "C"
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or "POSIX" as aliases. */
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cloc_name = _nl_expand_alias (*name);
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if (cloc_name == NULL)
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/* It is no alias. */
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cloc_name = *name;
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/* Make a writable copy of the locale name. */
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char *loc_name = strdupa (cloc_name);
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/* LOCALE can consist of up to four recognized parts for the XPG syntax:
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language[_territory[.codeset]][@modifier]
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Beside the first all of them are allowed to be missing. If the
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full specified locale is not found, the less specific one are
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looked for. The various part will be stripped off according to
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the following order:
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(1) codeset
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(2) normalized codeset
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(3) territory
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(4) modifier
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*/
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mask = _nl_explode_name (loc_name, &language, &modifier, &territory,
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&codeset, &normalized_codeset);
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if (mask == -1)
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/* Memory allocate problem. */
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return NULL;
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/* If exactly this locale was already asked for we have an entry with
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the complete name. */
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locale_file = _nl_make_l10nflist (&_nl_locale_file_list[category],
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locale_path, locale_path_len, mask,
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language, territory, codeset,
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normalized_codeset, modifier,
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_nl_category_names.str
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+ _nl_category_name_idxs[category], 0);
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if (locale_file == NULL)
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{
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/* Find status record for addressed locale file. We have to search
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through all directories in the locale path. */
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locale_file = _nl_make_l10nflist (&_nl_locale_file_list[category],
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locale_path, locale_path_len, mask,
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language, territory, codeset,
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normalized_codeset, modifier,
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_nl_category_names.str
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+ _nl_category_name_idxs[category], 1);
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if (locale_file == NULL)
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/* This means we are out of core. */
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return NULL;
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}
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/* The space for normalized_codeset is dynamically allocated. Free it. */
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if (mask & XPG_NORM_CODESET)
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free ((void *) normalized_codeset);
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if (locale_file->decided == 0)
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_nl_load_locale (locale_file, category);
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if (locale_file->data == NULL)
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{
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int cnt;
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for (cnt = 0; locale_file->successor[cnt] != NULL; ++cnt)
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{
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if (locale_file->successor[cnt]->decided == 0)
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_nl_load_locale (locale_file->successor[cnt], category);
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if (locale_file->successor[cnt]->data != NULL)
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break;
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}
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/* Move the entry we found (or NULL) to the first place of
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successors. */
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locale_file->successor[0] = locale_file->successor[cnt];
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locale_file = locale_file->successor[cnt];
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if (locale_file == NULL)
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return NULL;
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}
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|
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/* The LC_CTYPE category allows to check whether a locale is really
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usable. If the locale name contains a charset name and the
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charset name used in the locale (present in the LC_CTYPE data) is
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not the same (after resolving aliases etc) we reject the locale
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since using it would irritate users expecting the charset named
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in the locale name. */
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if (codeset != NULL)
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{
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/* Get the codeset information from the locale file. */
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static const int codeset_idx[] =
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{
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[__LC_CTYPE] = _NL_ITEM_INDEX (CODESET),
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[__LC_NUMERIC] = _NL_ITEM_INDEX (_NL_NUMERIC_CODESET),
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[__LC_TIME] = _NL_ITEM_INDEX (_NL_TIME_CODESET),
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[__LC_COLLATE] = _NL_ITEM_INDEX (_NL_COLLATE_CODESET),
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[__LC_MONETARY] = _NL_ITEM_INDEX (_NL_MONETARY_CODESET),
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[__LC_MESSAGES] = _NL_ITEM_INDEX (_NL_MESSAGES_CODESET),
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[__LC_PAPER] = _NL_ITEM_INDEX (_NL_PAPER_CODESET),
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[__LC_NAME] = _NL_ITEM_INDEX (_NL_NAME_CODESET),
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[__LC_ADDRESS] = _NL_ITEM_INDEX (_NL_ADDRESS_CODESET),
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[__LC_TELEPHONE] = _NL_ITEM_INDEX (_NL_TELEPHONE_CODESET),
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[__LC_MEASUREMENT] = _NL_ITEM_INDEX (_NL_MEASUREMENT_CODESET),
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[__LC_IDENTIFICATION] = _NL_ITEM_INDEX (_NL_IDENTIFICATION_CODESET)
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};
|
|
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const struct __locale_data *data;
|
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6c4009 |
const char *locale_codeset;
|
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6c4009 |
char *clocale_codeset;
|
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6c4009 |
char *ccodeset;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
data = (const struct __locale_data *) locale_file->data;
|
|
Packit |
6c4009 |
locale_codeset =
|
|
Packit |
6c4009 |
(const char *) data->values[codeset_idx[category]].string;
|
|
Packit |
6c4009 |
assert (locale_codeset != NULL);
|
|
Packit |
6c4009 |
/* Note the length of the allocated memory: +3 for up to two slashes
|
|
Packit |
6c4009 |
and the NUL byte. */
|
|
Packit |
6c4009 |
clocale_codeset = (char *) alloca (strlen (locale_codeset) + 3);
|
|
Packit |
6c4009 |
strip (clocale_codeset, locale_codeset);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
ccodeset = (char *) alloca (strlen (codeset) + 3);
|
|
Packit |
6c4009 |
strip (ccodeset, codeset);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (__gconv_compare_alias (upstr (ccodeset, ccodeset),
|
|
Packit |
6c4009 |
upstr (clocale_codeset,
|
|
Packit |
6c4009 |
clocale_codeset)) != 0)
|
|
Packit |
6c4009 |
/* The codesets are not identical, don't use the locale. */
|
|
Packit |
6c4009 |
return NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Determine the locale name for which loading succeeded. This
|
|
Packit |
6c4009 |
information comes from the file name. The form is
|
|
Packit |
6c4009 |
<path>/<locale>/LC_foo. We must extract the <locale> part. */
|
|
Packit |
6c4009 |
if (((const struct __locale_data *) locale_file->data)->name == NULL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
char *cp, *endp;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
endp = strrchr (locale_file->filename, '/');
|
|
Packit |
6c4009 |
cp = endp - 1;
|
|
Packit |
6c4009 |
while (cp[-1] != '/')
|
|
Packit |
6c4009 |
--cp;
|
|
Packit |
6c4009 |
((struct __locale_data *) locale_file->data)->name
|
|
Packit |
6c4009 |
= __strndup (cp, endp - cp);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Determine whether the user wants transliteration or not. */
|
|
Packit |
6c4009 |
if (modifier != NULL
|
|
Packit |
6c4009 |
&& __strcasecmp_l (modifier, "TRANSLIT", _nl_C_locobj_ptr) == 0)
|
|
Packit |
6c4009 |
((struct __locale_data *) locale_file->data)->use_translit = 1;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Increment the usage count. */
|
|
Packit |
6c4009 |
if (((const struct __locale_data *) locale_file->data)->usage_count
|
|
Packit |
6c4009 |
< MAX_USAGE_COUNT)
|
|
Packit |
6c4009 |
++((struct __locale_data *) locale_file->data)->usage_count;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return (struct __locale_data *) locale_file->data;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Calling this function assumes the lock for handling global locale data
|
|
Packit |
6c4009 |
is acquired. */
|
|
Packit |
6c4009 |
void
|
|
Packit |
6c4009 |
_nl_remove_locale (int locale, struct __locale_data *data)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
if (--data->usage_count == 0)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
if (data->alloc != ld_archive)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* First search the entry in the list of loaded files. */
|
|
Packit |
6c4009 |
struct loaded_l10nfile *ptr = _nl_locale_file_list[locale];
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Search for the entry. It must be in the list. Otherwise it
|
|
Packit |
6c4009 |
is a bug and we crash badly. */
|
|
Packit |
6c4009 |
while ((struct __locale_data *) ptr->data != data)
|
|
Packit |
6c4009 |
ptr = ptr->next;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Mark the data as not available anymore. So when the data has
|
|
Packit |
6c4009 |
to be used again it is reloaded. */
|
|
Packit |
6c4009 |
ptr->decided = 0;
|
|
Packit |
6c4009 |
ptr->data = NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* This does the real work. */
|
|
Packit |
6c4009 |
_nl_unload_locale (data);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
}
|