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 } 195