1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <errno.h> 30 #include <locale.h> 31 #include <pthread.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <strings.h> 35 #include <time.h> 36 #include <wchar.h> 37 38 #include "private/bionic_macros.h" 39 40 // We currently support a single locale, the "C" locale (also known as "POSIX"). 41 42 static bool __bionic_current_locale_is_utf8 = true; 43 44 struct __locale_t { 45 size_t mb_cur_max; 46 47 __locale_t(size_t mb_cur_max) : mb_cur_max(mb_cur_max) { 48 } 49 50 __locale_t(const __locale_t* other) { 51 if (other == LC_GLOBAL_LOCALE) { 52 mb_cur_max = __bionic_current_locale_is_utf8 ? 4 : 1; 53 } else { 54 mb_cur_max = other->mb_cur_max; 55 } 56 } 57 58 DISALLOW_COPY_AND_ASSIGN(__locale_t); 59 }; 60 61 size_t __ctype_get_mb_cur_max() { 62 locale_t l = uselocale(NULL); 63 if (l == LC_GLOBAL_LOCALE) { 64 return __bionic_current_locale_is_utf8 ? 4 : 1; 65 } else { 66 return l->mb_cur_max; 67 } 68 } 69 70 static pthread_once_t g_locale_once = PTHREAD_ONCE_INIT; 71 static lconv g_locale; 72 73 static void __locale_init() { 74 g_locale.decimal_point = const_cast<char*>("."); 75 76 char* not_available = const_cast<char*>(""); 77 g_locale.thousands_sep = not_available; 78 g_locale.grouping = not_available; 79 g_locale.int_curr_symbol = not_available; 80 g_locale.currency_symbol = not_available; 81 g_locale.mon_decimal_point = not_available; 82 g_locale.mon_thousands_sep = not_available; 83 g_locale.mon_grouping = not_available; 84 g_locale.positive_sign = not_available; 85 g_locale.negative_sign = not_available; 86 87 g_locale.int_frac_digits = CHAR_MAX; 88 g_locale.frac_digits = CHAR_MAX; 89 g_locale.p_cs_precedes = CHAR_MAX; 90 g_locale.p_sep_by_space = CHAR_MAX; 91 g_locale.n_cs_precedes = CHAR_MAX; 92 g_locale.n_sep_by_space = CHAR_MAX; 93 g_locale.p_sign_posn = CHAR_MAX; 94 g_locale.n_sign_posn = CHAR_MAX; 95 g_locale.int_p_cs_precedes = CHAR_MAX; 96 g_locale.int_p_sep_by_space = CHAR_MAX; 97 g_locale.int_n_cs_precedes = CHAR_MAX; 98 g_locale.int_n_sep_by_space = CHAR_MAX; 99 g_locale.int_p_sign_posn = CHAR_MAX; 100 g_locale.int_n_sign_posn = CHAR_MAX; 101 } 102 103 static bool __is_supported_locale(const char* locale) { 104 return (strcmp(locale, "") == 0 || 105 strcmp(locale, "C") == 0 || 106 strcmp(locale, "C.UTF-8") == 0 || 107 strcmp(locale, "en_US.UTF-8") == 0 || 108 strcmp(locale, "POSIX") == 0); 109 } 110 111 lconv* localeconv() { 112 pthread_once(&g_locale_once, __locale_init); 113 return &g_locale; 114 } 115 116 locale_t duplocale(locale_t l) { 117 return new __locale_t(l); 118 } 119 120 void freelocale(locale_t l) { 121 delete l; 122 } 123 124 locale_t newlocale(int category_mask, const char* locale_name, locale_t /*base*/) { 125 // Are 'category_mask' and 'locale_name' valid? 126 if ((category_mask & ~LC_ALL_MASK) != 0 || locale_name == NULL) { 127 errno = EINVAL; 128 return NULL; 129 } 130 131 if (!__is_supported_locale(locale_name)) { 132 errno = ENOENT; 133 return NULL; 134 } 135 136 return new __locale_t(strstr(locale_name, "UTF-8") != NULL ? 4 : 1); 137 } 138 139 char* setlocale(int category, const char* locale_name) { 140 // Is 'category' valid? 141 if (category < LC_CTYPE || category > LC_IDENTIFICATION) { 142 errno = EINVAL; 143 return NULL; 144 } 145 146 // Caller wants to set the locale rather than just query? 147 if (locale_name != NULL) { 148 if (!__is_supported_locale(locale_name)) { 149 // We don't support this locale. 150 errno = ENOENT; 151 return NULL; 152 } 153 __bionic_current_locale_is_utf8 = (strstr(locale_name, "UTF-8") != NULL); 154 } 155 156 return const_cast<char*>(__bionic_current_locale_is_utf8 ? "C.UTF-8" : "C"); 157 } 158 159 // We can't use a constructor to create g_uselocal_key, because it may be used in constructors. 160 static pthread_once_t g_uselocale_once = PTHREAD_ONCE_INIT; 161 static pthread_key_t g_uselocale_key; 162 163 static void g_uselocale_key_init() { 164 pthread_key_create(&g_uselocale_key, NULL); 165 } 166 167 locale_t uselocale(locale_t new_locale) { 168 pthread_once(&g_uselocale_once, g_uselocale_key_init); 169 locale_t old_locale = static_cast<locale_t>(pthread_getspecific(g_uselocale_key)); 170 171 // If this is the first call to uselocale(3) on this thread, we return LC_GLOBAL_LOCALE. 172 if (old_locale == NULL) { 173 old_locale = LC_GLOBAL_LOCALE; 174 } 175 176 if (new_locale != NULL) { 177 pthread_setspecific(g_uselocale_key, new_locale); 178 } 179 180 return old_locale; 181 } 182 183 int strcasecmp_l(const char* s1, const char* s2, locale_t) { 184 return strcasecmp(s1, s2); 185 } 186 187 int strcoll_l(const char* s1, const char* s2, locale_t) { 188 return strcoll(s1, s2); 189 } 190 191 char* strerror_l(int error, locale_t) { 192 return strerror(error); 193 } 194 195 size_t strftime_l(char* s, size_t max, const char* format, const struct tm* tm, locale_t) { 196 return strftime(s, max, format, tm); 197 } 198 199 int strncasecmp_l(const char* s1, const char* s2, size_t n, locale_t) { 200 return strncasecmp(s1, s2, n); 201 } 202 203 long double strtold_l(const char* s, char** end_ptr, locale_t) { 204 return strtold(s, end_ptr); 205 } 206 207 long long strtoll_l(const char* s, char** end_ptr, int base, locale_t) { 208 return strtoll(s, end_ptr, base); 209 } 210 211 unsigned long long strtoull_l(const char* s, char** end_ptr, int base, locale_t) { 212 return strtoull(s, end_ptr, base); 213 } 214 215 size_t strxfrm_l(char* dst, const char* src, size_t n, locale_t) { 216 return strxfrm(dst, src, n); 217 } 218 219 int wcscasecmp_l(const wchar_t* ws1, const wchar_t* ws2, locale_t) { 220 return wcscasecmp(ws1, ws2); 221 } 222 223 int wcsncasecmp_l(const wchar_t* ws1, const wchar_t* ws2, size_t n, locale_t) { 224 return wcsncasecmp(ws1, ws2, n); 225 } 226
