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/* Declarations for internal libc locale interfaces

   Copyright (C) 1995, 96, 97, 98, 99,2000,2001 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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.  */

#ifndef _LOCALEINFO_H

#define _LOCALEINFO_H 1

#include <stddef.h>

#include <langinfo.h>

#include <limits.h>

#include <time.h>

#include <stdint.h>

#include <sys/types.h>

/* This has to be changed whenever a new locale is defined.  */

#define __LC_LAST       13

#include "loadinfo.h"   /* For loaded_l10nfile definition.  */

/* Magic number at the beginning of a locale data file for CATEGORY.  */

#define LIMAGIC(category)       ((unsigned int) (0x20000828 ^ (category)))

/* Two special weight constants for the collation data.  */

#define IGNORE_CHAR     2

/* We use a special value for the usage counter in `locale_data' to

   signal that this data must never be removed anymore.  */

#define MAX_USAGE_COUNT (UINT_MAX - 1)

#define UNDELETABLE     UINT_MAX

/* Structure describing locale data in core for a category.  */

struct locale_data

{

  const char *name;

  const char *filedata;         /* Region mapping the file data.  */

  off_t filesize;               /* Size of the file (and the region).  */

  int mmaped;                   /* If nonzero the data is mmaped.  */

  unsigned int usage_count;     /* Counter for users.  */

  int use_translit;             /* Nonzero if the mb*towv*() and wc*tomb()

                                   functions should use transliteration.  */

  const char *options;          /* Extra options from the locale name,

                                   not used in the path to the locale data.  */

  unsigned int nstrings;        /* Number of strings below.  */

  union locale_data_value

  {

    const uint32_t *wstr;

    const char *string;

    unsigned int word;

  }

  values __flexarr;     /* Items, usually pointers into `filedata'.  */

};

/* We know three kinds of collation sorting rules.  */

enum coll_sort_rule

{

  illegal_0__,

  sort_forward,

  sort_backward,

  illegal_3__,

  sort_position,

  sort_forward_position,

  sort_backward_position,

  sort_mask

};

/* We can map the types of the entries into a few categories.  */

enum value_type

{

  none,

  string,

  stringarray,

  byte,

  bytearray,

  word,

  stringlist,

  wordarray,

  wstring,

  wstringarray,

  wstringlist

};

/* Definitions for `era' information from LC_TIME.  */

#define ERA_NAME_FORMAT_MEMBERS 4

#define ERA_M_NAME   0

#define ERA_M_FORMAT 1

#define ERA_W_NAME   2

#define ERA_W_FORMAT 3

/* Structure to access `era' information from LC_TIME.  */

struct era_entry

{

  uint32_t direction;           /* Contains '+' or '-'.  */

  int32_t offset;

  int32_t start_date[3];

  int32_t stop_date[3];

  const char *era_name;

  const char *era_format;

  const wchar_t *era_wname;

  const wchar_t *era_wformat;

  int absolute_direction;

  /* absolute direction:

     +1 indicates that year number is higher in the future. (like A.D.)

     -1 indicates that year number is higher in the past. (like B.C.)  */

};

/* LC_CTYPE specific:

   Hardwired indices for standard wide character translation mappings.  */

enum

{

  __TOW_toupper = 0,

  __TOW_tolower = 1

};

/* LC_CTYPE specific:

   Access a wide character class with a single character index.

   _ISCTYPE (c, desc) = iswctype (btowc (c), desc).

   c must be an `unsigned char'.  desc must be a nonzero wctype_t.  */

#define _ISCTYPE(c, desc) \

  (((((const uint32_t *) (desc)) - 8)[(c) >> 5] >> ((c) & 0x1f)) & 1)

/* For each category declare the variable for the current locale data.  */

#define DEFINE_CATEGORY(category, category_name, items, a) \

extern struct locale_data *_nl_current_##category;

#include "categories.def"

#undef  DEFINE_CATEGORY

extern const char *const _nl_category_names[__LC_LAST];

extern const size_t _nl_category_name_sizes[__LC_LAST];

extern struct locale_data * *const _nl_current[__LC_LAST];

/* Extract the current CATEGORY locale's string for ITEM.  */

#define _NL_CURRENT(category, item) \

  (_nl_current_##category->values[_NL_ITEM_INDEX (item)].string)

/* Extract the current CATEGORY locale's string for ITEM.  */

#define _NL_CURRENT_WSTR(category, item) \

  ((wchar_t *) (_nl_current_##category->values[_NL_ITEM_INDEX (item)].wstr))

/* Extract the current CATEGORY locale's word for ITEM.  */

#define _NL_CURRENT_WORD(category, item) \

  (_nl_current_##category->values[_NL_ITEM_INDEX (item)].word)

/* This is used in lc-CATEGORY.c to define _nl_current_CATEGORY.  */

#define _NL_CURRENT_DEFINE(category) \

  extern struct locale_data _nl_C_##category; \

  struct locale_data *_nl_current_##category = &_nl_C_##category

/* Load the locale data for CATEGORY from the file specified by *NAME.

   If *NAME is "", use environment variables as specified by POSIX,

   and fill in *NAME with the actual name used.  The directories

   listed in LOCALE_PATH are searched for the locale files.  */

extern struct locale_data *_nl_find_locale (const char *locale_path,

                                            size_t locale_path_len,

                                            int category, const char **name);

/* Try to load the file described by FILE.  */

extern void _nl_load_locale (struct loaded_l10nfile *file, int category);

/* Free all resource.  */

extern void _nl_unload_locale (struct locale_data *locale);

/* Free the locale and give back all memory if the usage count is one.  */

extern void _nl_remove_locale (int locale, struct locale_data *data);

/* Return `era' entry which corresponds to TP.  Used in strftime.  */

extern struct era_entry *_nl_get_era_entry (const struct tm *tp);

/* Return `era' cnt'th entry .  Used in strptime.  */

extern struct era_entry *_nl_select_era_entry (int cnt);

/* Return `alt_digit' which corresponds to NUMBER.  Used in strftime.  */

extern const char *_nl_get_alt_digit (unsigned int number);

/* Similar, but now for wide characters.  */

extern const wchar_t *_nl_get_walt_digit (unsigned int number);

/* Parse string as alternative digit and return numeric value.  */

extern int _nl_parse_alt_digit (const char **strp);

/* Postload processing.  */

extern void _nl_postload_ctype (void);

extern void _nl_postload_time (void);

#endif  /* localeinfo.h */