locale/localeinfo.h

   1 /* Declarations for internal libc locale interfaces
   2    Copyright (C) 1995, 96, 97, 98, 99,2000,2001 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _LOCALEINFO_H
  21 #define _LOCALEINFO_H 1
  22
  23 #include <stddef.h>
  24 #include <langinfo.h>
  25 #include <limits.h>
  26 #include <locale.h>
  27 #include <time.h>
  28 #include <stdint.h>
  29 #include <sys/types.h>
  30
  31 #include <intl/loadinfo.h>      /* For loaded_l10nfile definition.  */
  32
  33 /* Magic number at the beginning of a locale data file for CATEGORY.  */
  34 #define LIMAGIC(category)       ((unsigned int) (0x20000828 ^ (category)))
  35
  36 /* Two special weight constants for the collation data.  */
  37 #define IGNORE_CHAR     2
  38
  39 /* We use a special value for the usage counter in `locale_data' to
  40    signal that this data must never be removed anymore.  */
  41 #define MAX_USAGE_COUNT (UINT_MAX - 1)
  42 #define UNDELETABLE     UINT_MAX
  43
  44 /* Structure describing locale data in core for a category.  */
  45 struct locale_data
  46 {
  47   const char *name;
  48   const char *filedata;         /* Region mapping the file data.  */
  49   off_t filesize;               /* Size of the file (and the region).  */
  50   int mmaped;                   /* If nonzero the data is mmaped.  */
  51
  52   unsigned int usage_count;     /* Counter for users.  */
  53
  54   int use_translit;             /* Nonzero if the mb*towv*() and wc*tomb()
  55                                    functions should use transliteration.  */
  56   const char *options;          /* Extra options from the locale name,
  57                                    not used in the path to the locale data.  */
  58
  59   unsigned int nstrings;        /* Number of strings below.  */
  60   union locale_data_value
  61   {
  62     const uint32_t *wstr;
  63     const char *string;
  64     unsigned int word;
  65   }
  66   values __flexarr;     /* Items, usually pointers into `filedata'.  */
  67 };
  68
  69 /* We know three kinds of collation sorting rules.  */
  70 enum coll_sort_rule
  71 {
  72   illegal_0__,
  73   sort_forward,
  74   sort_backward,
  75   illegal_3__,
  76   sort_position,
  77   sort_forward_position,
  78   sort_backward_position,
  79   sort_mask
  80 };
  81
  82 /* We can map the types of the entries into a few categories.  */
  83 enum value_type
  84 {
  85   none,
  86   string,
  87   stringarray,
  88   byte,
  89   bytearray,
  90   word,
  91   stringlist,
  92   wordarray,
  93   wstring,
  94   wstringarray,
  95   wstringlist
  96 };
  97
  98
  99 /* Definitions for `era' information from LC_TIME.  */
 100 #define ERA_NAME_FORMAT_MEMBERS 4
 101 #define ERA_M_NAME   0
 102 #define ERA_M_FORMAT 1
 103 #define ERA_W_NAME   2
 104 #define ERA_W_FORMAT 3
 105
 106
 107 /* Structure to access `era' information from LC_TIME.  */
 108 struct era_entry
 109 {
 110   uint32_t direction;           /* Contains '+' or '-'.  */
 111   int32_t offset;
 112   int32_t start_date[3];
 113   int32_t stop_date[3];
 114   const char *era_name;
 115   const char *era_format;
 116   const wchar_t *era_wname;
 117   const wchar_t *era_wformat;
 118   int absolute_direction;
 119   /* absolute direction:
 120      +1 indicates that year number is higher in the future. (like A.D.)
 121      -1 indicates that year number is higher in the past. (like B.C.)  */
 122 };
 123
 124
 125 /* LC_CTYPE specific:
 126    Hardwired indices for standard wide character translation mappings.  */
 127 enum
 128 {
 129   __TOW_toupper = 0,
 130   __TOW_tolower = 1
 131 };
 132
 133
 134 /* LC_CTYPE specific:
 135    Access a wide character class with a single character index.
 136    _ISCTYPE (c, desc) = iswctype (btowc (c), desc).
 137    c must be an `unsigned char'.  desc must be a nonzero wctype_t.  */
 138 #define _ISCTYPE(c, desc) \
 139   (((((const uint32_t *) (desc)) - 8)[(c) >> 5] >> ((c) & 0x1f)) & 1)
 140
 141
 142 /* For each category declare the variable for the current locale data.  */
 143 #define DEFINE_CATEGORY(category, category_name, items, a) \
 144 extern struct locale_data *_nl_current_##category;
 145 #include "categories.def"
 146 #undef  DEFINE_CATEGORY
 147
 148 extern const char *const _nl_category_names[__LC_LAST];
 149 extern const size_t _nl_category_name_sizes[__LC_LAST];
 150 extern struct locale_data * *const _nl_current[__LC_LAST];
 151
 152 /* Name of the standard locales.  */
 153 extern const char _nl_C_name[];
 154 extern const char _nl_POSIX_name[];
 155
 156 /* The standard codeset.  */
 157 extern const char _nl_C_codeset[];
 158
 159 /* Extract the current CATEGORY locale's string for ITEM.  */
 160 #define _NL_CURRENT(category, item) \
 161   (_nl_current_##category->values[_NL_ITEM_INDEX (item)].string)
 162
 163 /* Extract the current CATEGORY locale's string for ITEM.  */
 164 #define _NL_CURRENT_WSTR(category, item) \
 165   ((wchar_t *) (_nl_current_##category->values[_NL_ITEM_INDEX (item)].wstr))
 166
 167 /* Extract the current CATEGORY locale's word for ITEM.  */
 168 #define _NL_CURRENT_WORD(category, item) \
 169   (_nl_current_##category->values[_NL_ITEM_INDEX (item)].word)
 170
 171 /* This is used in lc-CATEGORY.c to define _nl_current_CATEGORY.  */
 172 #define _NL_CURRENT_DEFINE(category) \
 173   extern struct locale_data _nl_C_##category; \
 174   struct locale_data *_nl_current_##category = &_nl_C_##category
 175
 176 /* Load the locale data for CATEGORY from the file specified by *NAME.
 177    If *NAME is "", use environment variables as specified by POSIX,
 178    and fill in *NAME with the actual name used.  The directories
 179    listed in LOCALE_PATH are searched for the locale files.  */
 180 extern struct locale_data *_nl_find_locale (const char *locale_path,
 181                                             size_t locale_path_len,
 182                                             int category, const char **name);
 183
 184 /* Try to load the file described by FILE.  */
 185 extern void _nl_load_locale (struct loaded_l10nfile *file, int category);
 186
 187 /* Free all resource.  */
 188 extern void _nl_unload_locale (struct locale_data *locale);
 189
 190 /* Free the locale and give back all memory if the usage count is one.  */
 191 extern void _nl_remove_locale (int locale, struct locale_data *data);
 192
 193
 194 /* Return `era' entry which corresponds to TP.  Used in strftime.  */
 195 extern struct era_entry *_nl_get_era_entry (const struct tm *tp);
 196
 197 /* Return `era' cnt'th entry .  Used in strptime.  */
 198 extern struct era_entry *_nl_select_era_entry (int cnt);
 199
 200 /* Return `alt_digit' which corresponds to NUMBER.  Used in strftime.  */
 201 extern const char *_nl_get_alt_digit (unsigned int number);
 202
 203 /* Similar, but now for wide characters.  */
 204 extern const wchar_t *_nl_get_walt_digit (unsigned int number);
 205
 206 /* Parse string as alternative digit and return numeric value.  */
 207 extern int _nl_parse_alt_digit (const char **strp);
 208
 209 /* Postload processing.  */
 210 extern void _nl_postload_ctype (void);
 211 extern void _nl_postload_time (void);
 212
 213
 214 #endif  /* localeinfo.h */