lib/libc/locale/setlocale.c

   1 /* $NetBSD: setlocale.c,v 1.64 2013/09/13 13:13:32 joerg Exp $ */
   2
   3 /*-
   4  * Copyright (c)2008 Citrus Project,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 __RCSID("$NetBSD: setlocale.c,v 1.64 2013/09/13 13:13:32 joerg Exp $");
  32 #endif /* LIBC_SCCS and not lint */
  33
  34 #include <sys/types.h>
  35 #include <sys/localedef.h>
  36 #include <locale.h>
  37 #include <limits.h>
  38 #include <paths.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 #include "setlocale_local.h"
  44
  45 const char *_PathLocale = NULL;
  46
  47 static _locale_set_t all_categories[_LC_LAST] = {
  48         [LC_ALL     ] = &_generic_LC_ALL_setlocale,
  49         [LC_COLLATE ] = &_dummy_LC_COLLATE_setlocale,
  50         [LC_CTYPE   ] = &_citrus_LC_CTYPE_setlocale,
  51         [LC_MONETARY] = &_citrus_LC_MONETARY_setlocale,
  52         [LC_NUMERIC ] = &_citrus_LC_NUMERIC_setlocale,
  53         [LC_TIME    ] = &_citrus_LC_TIME_setlocale,
  54         [LC_MESSAGES] = &_citrus_LC_MESSAGES_setlocale,
  55 };
  56
  57 /* XXX Consider locking the list. Race condition leaks memory. */
  58 static SLIST_HEAD(, _locale_cache_t) caches = {
  59     __UNCONST(&_C_cache)
  60 };
  61
  62 int
  63 _setlocale_cache(locale_t loc, struct _locale_cache_t *cache)
  64 {
  65         const char *monetary_name = loc->part_name[LC_MONETARY];
  66         const char *numeric_name = loc->part_name[LC_NUMERIC];
  67         _NumericLocale *numeric = loc->part_impl[LC_NUMERIC];
  68         _MonetaryLocale *monetary = loc->part_impl[LC_MONETARY];
  69         struct lconv *ldata;
  70
  71         struct _locale_cache_t *old_cache;
  72
  73         SLIST_FOREACH(old_cache, &caches, cache_link) {
  74                 if (monetary_name != old_cache->monetary_name &&
  75                     strcmp(monetary_name, old_cache->monetary_name) != 0)
  76                         continue;
  77                 if (numeric_name != old_cache->numeric_name &&
  78                     strcmp(numeric_name, old_cache->numeric_name) != 0)
  79                         continue;
  80                 loc->cache = old_cache;
  81                 free(cache);
  82                 return 0;
  83         }
  84
  85         if (cache == NULL) {
  86                 cache = malloc(sizeof(*cache));
  87                 if (cache == NULL)
  88                         return -1;
  89         }
  90
  91         cache->monetary_name = monetary_name;
  92         cache->numeric_name = numeric_name;
  93         ldata = &cache->ldata;
  94
  95         ldata->decimal_point = __UNCONST(numeric->decimal_point);
  96         ldata->thousands_sep = __UNCONST(numeric->thousands_sep);
  97         ldata->grouping      = __UNCONST(numeric->grouping);
  98
  99         ldata->int_curr_symbol   = __UNCONST(monetary->int_curr_symbol);
 100         ldata->currency_symbol   = __UNCONST(monetary->currency_symbol);
 101         ldata->mon_decimal_point = __UNCONST(monetary->mon_decimal_point);
 102         ldata->mon_thousands_sep = __UNCONST(monetary->mon_thousands_sep);
 103         ldata->mon_grouping      = __UNCONST(monetary->mon_grouping);
 104         ldata->positive_sign     = __UNCONST(monetary->positive_sign);
 105         ldata->negative_sign     = __UNCONST(monetary->negative_sign);
 106
 107         ldata->int_frac_digits    = monetary->int_frac_digits;
 108         ldata->frac_digits        = monetary->frac_digits;
 109         ldata->p_cs_precedes      = monetary->p_cs_precedes;
 110         ldata->p_sep_by_space     = monetary->p_sep_by_space;
 111         ldata->n_cs_precedes      = monetary->n_cs_precedes;
 112         ldata->n_sep_by_space     = monetary->n_sep_by_space;
 113         ldata->p_sign_posn        = monetary->p_sign_posn;
 114         ldata->n_sign_posn        = monetary->n_sign_posn;
 115         ldata->int_p_cs_precedes  = monetary->int_p_cs_precedes;
 116         ldata->int_n_cs_precedes  = monetary->int_n_cs_precedes;
 117         ldata->int_p_sep_by_space = monetary-> int_p_sep_by_space;
 118         ldata->int_n_sep_by_space = monetary->int_n_sep_by_space;
 119         ldata->int_p_sign_posn    = monetary->int_p_sign_posn;
 120         ldata->int_n_sign_posn    = monetary->int_n_sign_posn;
 121         SLIST_INSERT_HEAD(&caches, cache, cache_link);
 122
 123         loc->cache = cache;
 124         return 0;
 125 }
 126
 127 _locale_set_t
 128 _find_category(int category)
 129 {
 130         static int initialised;
 131
 132         if (!initialised) {
 133                 if (issetugid() || ((_PathLocale == NULL &&
 134                     (_PathLocale = getenv("PATH_LOCALE")) == NULL) ||
 135                     *_PathLocale == '\0'))
 136                         _PathLocale = _PATH_LOCALE;
 137                 initialised = 1;
 138         }
 139
 140         if (category >= LC_ALL && category < _LC_LAST)
 141                 return all_categories[category];
 142         return NULL;
 143 }
 144
 145 const char *
 146 _get_locale_env(const char *category)
 147 {
 148         const char *name;
 149
 150         /* 1. check LC_ALL */
 151         name = (const char *)getenv("LC_ALL");
 152         if (name == NULL || *name == '\0') {
 153                 /* 2. check LC_* */
 154                 name = (const char *)getenv(category);
 155                 if (name == NULL || *name == '\0') {
 156                         /* 3. check LANG */
 157                         name = getenv("LANG");
 158                 }
 159         }
 160         if (name == NULL || *name == '\0' || strchr(name, '/'))
 161                 /* 4. if none is set, fall to "C" */
 162                 name = _C_LOCALE;
 163         return name;
 164 }
 165
 166 char *
 167 __setlocale(int category, const char *name)
 168 {
 169         _locale_set_t sl;
 170         locale_t loc;
 171         struct _locale_cache_t *cache;
 172         const char *result;
 173
 174         sl = _find_category(category);
 175         if (sl == NULL)
 176                 return NULL;
 177         cache = malloc(sizeof(*cache));
 178         if (cache == NULL)
 179                 return NULL;
 180         loc = _current_locale();
 181         result = (*sl)(name, loc);
 182         _setlocale_cache(loc, cache);
 183         return __UNCONST(result);
 184 }
 185
 186 char *
 187 setlocale(int category, const char *locale)
 188 {
 189
 190         /* locale may be NULL */
 191
 192         __mb_len_max_runtime = MB_LEN_MAX;
 193         return __setlocale(category, locale);
 194 }