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/* Declarations for internal libc locale interfaces
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Copyright (C) 1995-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#ifndef _LOCALEINFO_H
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#define _LOCALEINFO_H 1
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#include <stddef.h>
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#include <langinfo.h>
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#include <limits.h>
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#include <locale.h>
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#include <time.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <intl/loadinfo.h> /* For loaded_l10nfile definition. */
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/* Magic number at the beginning of a locale data file for CATEGORY. */
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#define LIMAGIC(category) \
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(category == LC_COLLATE \
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? ((unsigned int) (0x20051014 ^ (category))) \
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: category == LC_CTYPE \
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? ((unsigned int) (0x20090720 ^ (category))) \
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: ((unsigned int) (0x20031115 ^ (category))))
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/* Two special weight constants for the collation data. */
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#define IGNORE_CHAR 2
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/* We use a special value for the usage counter in `__locale_data' to
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signal that this data must never be removed anymore. */
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#define MAX_USAGE_COUNT (UINT_MAX - 1)
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#define UNDELETABLE UINT_MAX
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/* Structure describing locale data in core for a category. */
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struct __locale_data
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{
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const char *name;
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const char *filedata; /* Region mapping the file data. */
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off_t filesize; /* Size of the file (and the region). */
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enum /* Flavor of storage used for those. */
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{
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ld_malloced, /* Both are malloc'd. */
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ld_mapped, /* name is malloc'd, filedata mmap'd */
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ld_archive /* Both point into mmap'd archive regions. */
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} alloc;
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/* This provides a slot for category-specific code to cache data computed
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about this locale. That code can set a cleanup function to deallocate
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the data. */
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struct
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{
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void (*cleanup) (struct __locale_data *);
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union
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{
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void *data;
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struct lc_time_data *time;
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const struct gconv_fcts *ctype;
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};
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} private;
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unsigned int usage_count; /* Counter for users. */
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int use_translit; /* Nonzero if the mb*towv*() and wc*tomb()
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functions should use transliteration. */
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unsigned int nstrings; /* Number of strings below. */
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union locale_data_value
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{
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const uint32_t *wstr;
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const char *string;
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unsigned int word; /* Note endian issues vs 64-bit pointers. */
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}
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values __flexarr; /* Items, usually pointers into `filedata'. */
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};
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/* This alignment is used for 32-bit integers in locale files, both
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those that are explicitly int32_t or uint32_t and those that are
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wchar_t, regardless of the (possibly smaller) alignment required
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for such integers on a particular host. */
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#define LOCFILE_ALIGN sizeof (int32_t)
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#define LOCFILE_ALIGN_MASK (LOCFILE_ALIGN - 1)
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#define LOCFILE_ALIGN_UP(x) (((x) + LOCFILE_ALIGN - 1) \
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& ~LOCFILE_ALIGN_MASK)
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#define LOCFILE_ALIGNED_P(x) (((x) & LOCFILE_ALIGN_MASK) == 0)
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/* We know three kinds of collation sorting rules. */
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enum coll_sort_rule
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{
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illegal_0__,
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sort_forward,
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sort_backward,
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illegal_3__,
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sort_position,
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sort_forward_position,
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sort_backward_position,
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sort_mask
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};
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/* We can map the types of the entries into a few categories. */
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enum value_type
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{
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none,
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string,
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stringarray,
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byte,
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bytearray,
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word,
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stringlist,
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wordarray,
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wstring,
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wstringarray,
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wstringlist
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};
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/* Definitions for `era' information from LC_TIME. */
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#define ERA_NAME_FORMAT_MEMBERS 4
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#define ERA_M_NAME 0
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#define ERA_M_FORMAT 1
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#define ERA_W_NAME 2
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#define ERA_W_FORMAT 3
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/* Structure to access `era' information from LC_TIME. */
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struct era_entry
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{
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uint32_t direction; /* Contains '+' or '-'. */
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int32_t offset;
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int32_t start_date[3];
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int32_t stop_date[3];
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const char *era_name;
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const char *era_format;
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const wchar_t *era_wname;
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const wchar_t *era_wformat;
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int absolute_direction;
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/* absolute direction:
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+1 indicates that year number is higher in the future. (like A.D.)
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-1 indicates that year number is higher in the past. (like B.C.) */
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};
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/* Structure caching computed data about information from LC_TIME.
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The `private.time' member of `struct __locale_data' points to this. */
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struct lc_time_data
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{
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struct era_entry *eras;
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size_t num_eras;
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int era_initialized;
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const char **alt_digits;
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const wchar_t **walt_digits;
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int alt_digits_initialized;
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int walt_digits_initialized;
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};
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/* LC_CTYPE specific:
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Hardwired indices for standard wide character translation mappings. */
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enum
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{
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__TOW_toupper = 0,
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__TOW_tolower = 1
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};
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/* LC_CTYPE specific:
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Access a wide character class with a single character index.
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_ISCTYPE (c, desc) = iswctype (btowc (c), desc).
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c must be an `unsigned char'. desc must be a nonzero wctype_t. */
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#define _ISCTYPE(c, desc) \
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(((((const uint32_t *) (desc)) - 8)[(c) >> 5] >> ((c) & 0x1f)) & 1)
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/* Category name handling variables. */
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#define CATNAMEMF(line) CATNAMEMF1 (line)
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#define CATNAMEMF1(line) str##line
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extern const union catnamestr_t
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{
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struct
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{
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#define DEFINE_CATEGORY(category, category_name, items, a) \
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char CATNAMEMF (__LINE__)[sizeof (category_name)];
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#include "categories.def"
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#undef DEFINE_CATEGORY
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};
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char str[0];
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} _nl_category_names attribute_hidden;
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extern const uint8_t _nl_category_name_idxs[__LC_LAST] attribute_hidden;
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extern const uint8_t _nl_category_name_sizes[__LC_LAST] attribute_hidden;
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/* Name of the standard locales. */
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extern const char _nl_C_name[] attribute_hidden;
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extern const char _nl_POSIX_name[] attribute_hidden;
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/* The standard codeset. */
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extern const char _nl_C_codeset[] attribute_hidden;
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/* This is the internal locale_t object that holds the global locale
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controlled by calls to setlocale. A thread's TSD locale pointer
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points to this when `uselocale (LC_GLOBAL_LOCALE)' is in effect. */
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extern struct __locale_struct _nl_global_locale attribute_hidden;
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/* This fetches the thread-local locale_t pointer, either one set with
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uselocale or &_nl_global_locale. */
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#define _NL_CURRENT_LOCALE (__libc_tsd_get (locale_t, LOCALE))
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#include <libc-tsd.h>
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__libc_tsd_define (extern, locale_t, LOCALE)
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/* For static linking it is desireable to avoid always linking in the code
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and data for every category when we can tell at link time that they are
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unused. We can manage this playing some tricks with weak references.
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But with thread-local locale settings, it becomes quite ungainly unless
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we can use __thread variables. So only in that case do we attempt this. */
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#ifndef SHARED
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# include <tls.h>
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# define NL_CURRENT_INDIRECT 1
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#endif
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#ifdef NL_CURRENT_INDIRECT
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/* For each category declare the thread-local variable for the current
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locale data. This has an extra indirection so it points at the
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__locales[CATEGORY] element in either _nl_global_locale or the current
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locale object set by uselocale, which points at the actual data. The
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reason for having these variables is so that references to particular
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categories will link in the lc-CATEGORY.c module to define this symbol,
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and we arrange that linking that module is what brings in all the code
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associated with this category. */
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#define DEFINE_CATEGORY(category, category_name, items, a) \
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extern __thread struct __locale_data *const *_nl_current_##category \
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attribute_hidden attribute_tls_model_ie;
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#include "categories.def"
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#undef DEFINE_CATEGORY
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/* Return a pointer to the current `struct __locale_data' for CATEGORY. */
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#define _NL_CURRENT_DATA(category) (*_nl_current_##category)
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/* Extract the current CATEGORY locale's string for ITEM. */
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#define _NL_CURRENT(category, item) \
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((*_nl_current_##category)->values[_NL_ITEM_INDEX (item)].string)
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/* Extract the current CATEGORY locale's string for ITEM. */
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#define _NL_CURRENT_WSTR(category, item) \
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((wchar_t *) (*_nl_current_##category)->values[_NL_ITEM_INDEX (item)].wstr)
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/* Extract the current CATEGORY locale's word for ITEM. */
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#define _NL_CURRENT_WORD(category, item) \
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((uint32_t) (*_nl_current_##category)->values[_NL_ITEM_INDEX (item)].word)
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/* This is used in lc-CATEGORY.c to define _nl_current_CATEGORY. The symbol
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_nl_current_CATEGORY_used is set to a value unequal to zero to mark this
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category as used. On S390 the used relocation to load the symbol address
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can only handle even addresses. */
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#define _NL_CURRENT_DEFINE(category) \
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__thread struct __locale_data *const *_nl_current_##category \
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attribute_hidden = &_nl_global_locale.__locales[category]; \
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asm (".globl " __SYMBOL_PREFIX "_nl_current_" #category "_used\n" \
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_NL_CURRENT_DEFINE_ABS (_nl_current_##category##_used, 2));
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#ifdef HAVE_ASM_SET_DIRECTIVE
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# define _NL_CURRENT_DEFINE_ABS(sym, val) ".set " #sym ", " #val
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#else
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# define _NL_CURRENT_DEFINE_ABS(sym, val) #sym " = " #val
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#endif
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#else
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6c4009 |
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/* All categories are always loaded in the shared library, so there is no
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point in having lots of separate symbols for linking. */
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6c4009 |
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6c4009 |
/* Return a pointer to the current `struct __locale_data' for CATEGORY. */
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# define _NL_CURRENT_DATA(category) \
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(_NL_CURRENT_LOCALE->__locales[category])
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/* Extract the current CATEGORY locale's string for ITEM. */
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# define _NL_CURRENT(category, item) \
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(_NL_CURRENT_DATA (category)->values[_NL_ITEM_INDEX (item)].string)
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/* Extract the current CATEGORY locale's string for ITEM. */
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# define _NL_CURRENT_WSTR(category, item) \
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((wchar_t *) _NL_CURRENT_DATA (category)->values[_NL_ITEM_INDEX (item)].wstr)
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/* Extract the current CATEGORY locale's word for ITEM. */
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# define _NL_CURRENT_WORD(category, item) \
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((uint32_t) _NL_CURRENT_DATA (category)->values[_NL_ITEM_INDEX (item)].word)
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/* This is used in lc-CATEGORY.c to define _nl_current_CATEGORY. */
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# define _NL_CURRENT_DEFINE(category) \
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/* No per-category variable here. */
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#endif
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/* Extract CATEGORY locale's string for ITEM. */
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static inline const char *
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_nl_lookup (locale_t l, int category, int item)
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{
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return l->__locales[category]->values[_NL_ITEM_INDEX (item)].string;
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}
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/* Extract CATEGORY locale's wide string for ITEM. */
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static inline const wchar_t *
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_nl_lookup_wstr (locale_t l, int category, int item)
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{
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return (wchar_t *) l->__locales[category]
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->values[_NL_ITEM_INDEX (item)].wstr;
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}
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/* Extract the CATEGORY locale's word for ITEM. */
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static inline uint32_t
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_nl_lookup_word (locale_t l, int category, int item)
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{
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return l->__locales[category]->values[_NL_ITEM_INDEX (item)].word;
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}
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/* Default search path if no LOCPATH environment variable. */
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extern const char _nl_default_locale_path[] attribute_hidden;
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/* Load the locale data for CATEGORY from the file specified by *NAME.
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If *NAME is "", use environment variables as specified by POSIX, and
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fill in *NAME with the actual name used. If LOCALE_PATH is not null,
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those directories are searched for the locale files. If it's null,
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the locale archive is checked first and then _nl_default_locale_path
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is searched for locale files. */
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extern struct __locale_data *_nl_find_locale (const char *locale_path,
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size_t locale_path_len,
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int category, const char **name)
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attribute_hidden;
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/* Try to load the file described by FILE. */
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extern void _nl_load_locale (struct loaded_l10nfile *file, int category)
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attribute_hidden;
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/* Free all resource. */
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extern void _nl_unload_locale (struct __locale_data *locale) attribute_hidden;
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/* Free the locale and give back all memory if the usage count is one. */
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extern void _nl_remove_locale (int locale, struct __locale_data *data)
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attribute_hidden;
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/* Find the locale *NAMEP in the locale archive, and return the
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internalized data structure for its CATEGORY data. If this locale has
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already been loaded from the archive, just returns the existing data
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structure. If successful, sets *NAMEP to point directly into the mapped
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archive string table; that way, the next call can short-circuit strcmp. */
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extern struct __locale_data *_nl_load_locale_from_archive (int category,
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const char **namep)
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6c4009 |
attribute_hidden;
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6c4009 |
|
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/* Subroutine of setlocale's __libc_subfreeres hook. */
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extern void _nl_archive_subfreeres (void) attribute_hidden;
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/* Subroutine of gconv-db's __libc_subfreeres hook. */
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extern void _nl_locale_subfreeres (void) attribute_hidden;
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/* Validate the contents of a locale file and set up the in-core
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data structure to point into the data. This leaves the `alloc'
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and `name' fields uninitialized, for the caller to fill in.
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If any bogons are detected in the data, this will refuse to
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intern it, and return a null pointer instead. */
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extern struct __locale_data *_nl_intern_locale_data (int category,
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const void *data,
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6c4009 |
size_t datasize)
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attribute_hidden;
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6c4009 |
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/* Return `era' entry which corresponds to TP. Used in strftime. */
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extern struct era_entry *_nl_get_era_entry (const struct tm *tp,
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struct __locale_data *lc_time)
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attribute_hidden;
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|
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/* Return `era' cnt'th entry . Used in strptime. */
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extern struct era_entry *_nl_select_era_entry (int cnt,
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struct __locale_data *lc_time)
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attribute_hidden;
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6c4009 |
|
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/* Return `alt_digit' which corresponds to NUMBER. Used in strftime. */
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extern const char *_nl_get_alt_digit (unsigned int number,
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6c4009 |
struct __locale_data *lc_time)
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6c4009 |
attribute_hidden;
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6c4009 |
|
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/* Similar, but now for wide characters. */
|
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extern const wchar_t *_nl_get_walt_digit (unsigned int number,
|
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6c4009 |
struct __locale_data *lc_time)
|
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6c4009 |
attribute_hidden;
|
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6c4009 |
|
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/* Parse string as alternative digit and return numeric value. */
|
|
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6c4009 |
extern int _nl_parse_alt_digit (const char **strp,
|
|
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6c4009 |
struct __locale_data *lc_time)
|
|
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6c4009 |
attribute_hidden;
|
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6c4009 |
|
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/* Postload processing. */
|
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extern void _nl_postload_ctype (void);
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6c4009 |
|
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/* Functions used for the `private.cleanup' hook. */
|
|
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extern void _nl_cleanup_time (struct __locale_data *) attribute_hidden;
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6c4009 |
|
|
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6c4009 |
|
|
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6c4009 |
#endif /* localeinfo.h */
|