1 // Copyright (C) 1997-2013 Free Software Foundation, Inc. 2 // 3 // This file is part of the GNU ISO C++ Library. This library is free 4 // software; you can redistribute it and/or modify it under the 5 // terms of the GNU General Public License as published by the 6 // Free Software Foundation; either version 3, or (at your option) 7 // any later version. 8 9 // This library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU General Public License for more details. 13 14 // Under Section 7 of GPL version 3, you are granted additional 15 // permissions described in the GCC Runtime Library Exception, version 16 // 3.1, as published by the Free Software Foundation. 17 18 // You should have received a copy of the GNU General Public License and 19 // a copy of the GCC Runtime Library Exception along with this program; 20 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 21 // <http://www.gnu.org/licenses/>. 22 23 #include <clocale> 24 #include <cstring> 25 #include <cstdlib> // For getenv 26 #include <cctype> 27 #include <cwctype> // For towupper, etc. 28 #include <locale> 29 #include <ext/concurrence.h> 30 31 namespace 32 { 33 __gnu_cxx::__mutex& get_locale_cache_mutex()34 get_locale_cache_mutex() 35 { 36 static __gnu_cxx::__mutex locale_cache_mutex; 37 return locale_cache_mutex; 38 } 39 } // anonymous namespace 40 41 // XXX GLIBCXX_ABI Deprecated 42 #ifdef _GLIBCXX_LONG_DOUBLE_COMPAT 43 # define _GLIBCXX_LOC_ID(mangled) extern std::locale::id mangled 44 _GLIBCXX_LOC_ID (_ZNSt7num_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE); 45 _GLIBCXX_LOC_ID (_ZNSt7num_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE); 46 _GLIBCXX_LOC_ID (_ZNSt9money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE); 47 _GLIBCXX_LOC_ID (_ZNSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE); 48 # ifdef _GLIBCXX_USE_WCHAR_T 49 _GLIBCXX_LOC_ID (_ZNSt7num_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE); 50 _GLIBCXX_LOC_ID (_ZNSt7num_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE); 51 _GLIBCXX_LOC_ID (_ZNSt9money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE); 52 _GLIBCXX_LOC_ID (_ZNSt9money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE); 53 # endif 54 #endif 55 56 namespace std _GLIBCXX_VISIBILITY(default) 57 { 58 _GLIBCXX_BEGIN_NAMESPACE_VERSION 59 60 // Definitions for static const data members of locale. 61 const locale::category locale::none; 62 const locale::category locale::ctype; 63 const locale::category locale::numeric; 64 const locale::category locale::collate; 65 const locale::category locale::time; 66 const locale::category locale::monetary; 67 const locale::category locale::messages; 68 const locale::category locale::all; 69 70 // These are no longer exported. 71 locale::_Impl* locale::_S_classic; 72 locale::_Impl* locale::_S_global; 73 74 #ifdef __GTHREADS 75 __gthread_once_t locale::_S_once = __GTHREAD_ONCE_INIT; 76 #endif 77 locale(const locale & __other)78 locale::locale(const locale& __other) throw() 79 : _M_impl(__other._M_impl) 80 { _M_impl->_M_add_reference(); } 81 82 // This is used to initialize global and classic locales, and 83 // assumes that the _Impl objects are constructed correctly. 84 // The lack of a reference increment is intentional. locale(_Impl * __ip)85 locale::locale(_Impl* __ip) throw() : _M_impl(__ip) 86 { } 87 ~locale()88 locale::~locale() throw() 89 { _M_impl->_M_remove_reference(); } 90 91 bool operator ==(const locale & __rhs) const92 locale::operator==(const locale& __rhs) const throw() 93 { 94 // Deal first with the common cases, fast to process: refcopies, 95 // unnamed (i.e., !_M_names[0]), "simple" (!_M_names[1] => all the 96 // categories same name, i.e., _M_names[0]). Otherwise fall back 97 // to the general locale::name(). 98 bool __ret; 99 if (_M_impl == __rhs._M_impl) 100 __ret = true; 101 else if (!_M_impl->_M_names[0] || !__rhs._M_impl->_M_names[0] 102 || std::strcmp(_M_impl->_M_names[0], 103 __rhs._M_impl->_M_names[0]) != 0) 104 __ret = false; 105 else if (!_M_impl->_M_names[1] && !__rhs._M_impl->_M_names[1]) 106 __ret = true; 107 else 108 __ret = this->name() == __rhs.name(); 109 return __ret; 110 } 111 112 const locale& operator =(const locale & __other)113 locale::operator=(const locale& __other) throw() 114 { 115 __other._M_impl->_M_add_reference(); 116 _M_impl->_M_remove_reference(); 117 _M_impl = __other._M_impl; 118 return *this; 119 } 120 121 string name() const122 locale::name() const 123 { 124 string __ret; 125 if (!_M_impl->_M_names[0]) 126 __ret = '*'; 127 else if (_M_impl->_M_check_same_name()) 128 __ret = _M_impl->_M_names[0]; 129 else 130 { 131 __ret.reserve(128); 132 __ret += _S_categories[0]; 133 __ret += '='; 134 __ret += _M_impl->_M_names[0]; 135 for (size_t __i = 1; __i < _S_categories_size; ++__i) 136 { 137 __ret += ';'; 138 __ret += _S_categories[__i]; 139 __ret += '='; 140 __ret += _M_impl->_M_names[__i]; 141 } 142 } 143 return __ret; 144 } 145 146 locale::category _S_normalize_category(category __cat)147 locale::_S_normalize_category(category __cat) 148 { 149 int __ret = 0; 150 if (__cat == none || ((__cat & all) && !(__cat & ~all))) 151 __ret = __cat; 152 else 153 { 154 // NB: May be a C-style "LC_ALL" category; convert. 155 switch (__cat) 156 { 157 case LC_COLLATE: 158 __ret = collate; 159 break; 160 case LC_CTYPE: 161 __ret = ctype; 162 break; 163 case LC_MONETARY: 164 __ret = monetary; 165 break; 166 case LC_NUMERIC: 167 __ret = numeric; 168 break; 169 case LC_TIME: 170 __ret = time; 171 break; 172 #ifdef _GLIBCXX_HAVE_LC_MESSAGES 173 case LC_MESSAGES: 174 __ret = messages; 175 break; 176 #endif 177 case LC_ALL: 178 __ret = all; 179 break; 180 default: 181 __throw_runtime_error(__N("locale::_S_normalize_category " 182 "category not found")); 183 } 184 } 185 return __ret; 186 } 187 188 // locale::facet 189 __c_locale locale::facet::_S_c_locale; 190 191 const char locale::facet::_S_c_name[2] = "C"; 192 193 #ifdef __GTHREADS 194 __gthread_once_t locale::facet::_S_once = __GTHREAD_ONCE_INIT; 195 #endif 196 197 void _S_initialize_once()198 locale::facet::_S_initialize_once() 199 { 200 // Initialize the underlying locale model. 201 _S_create_c_locale(_S_c_locale, _S_c_name); 202 } 203 204 __c_locale _S_get_c_locale()205 locale::facet::_S_get_c_locale() 206 { 207 #ifdef __GTHREADS 208 if (__gthread_active_p()) 209 __gthread_once(&_S_once, _S_initialize_once); 210 else 211 #endif 212 { 213 if (!_S_c_locale) 214 _S_initialize_once(); 215 } 216 return _S_c_locale; 217 } 218 219 const char* _S_get_c_name()220 locale::facet::_S_get_c_name() throw() 221 { return _S_c_name; } 222 223 locale::facet:: ~facet()224 ~facet() { } 225 226 // locale::_Impl 227 locale::_Impl:: ~_Impl()228 ~_Impl() throw() 229 { 230 if (_M_facets) 231 for (size_t __i = 0; __i < _M_facets_size; ++__i) 232 if (_M_facets[__i]) 233 _M_facets[__i]->_M_remove_reference(); 234 delete [] _M_facets; 235 236 if (_M_caches) 237 for (size_t __i = 0; __i < _M_facets_size; ++__i) 238 if (_M_caches[__i]) 239 _M_caches[__i]->_M_remove_reference(); 240 delete [] _M_caches; 241 242 if (_M_names) 243 for (size_t __i = 0; __i < _S_categories_size; ++__i) 244 delete [] _M_names[__i]; 245 delete [] _M_names; 246 } 247 248 // Clone existing _Impl object. 249 locale::_Impl:: _Impl(const _Impl & __imp,size_t __refs)250 _Impl(const _Impl& __imp, size_t __refs) 251 : _M_refcount(__refs), _M_facets(0), _M_facets_size(__imp._M_facets_size), 252 _M_caches(0), _M_names(0) 253 { 254 __try 255 { 256 _M_facets = new const facet*[_M_facets_size]; 257 for (size_t __i = 0; __i < _M_facets_size; ++__i) 258 { 259 _M_facets[__i] = __imp._M_facets[__i]; 260 if (_M_facets[__i]) 261 _M_facets[__i]->_M_add_reference(); 262 } 263 _M_caches = new const facet*[_M_facets_size]; 264 for (size_t __j = 0; __j < _M_facets_size; ++__j) 265 { 266 _M_caches[__j] = __imp._M_caches[__j]; 267 if (_M_caches[__j]) 268 _M_caches[__j]->_M_add_reference(); 269 } 270 _M_names = new char*[_S_categories_size]; 271 for (size_t __k = 0; __k < _S_categories_size; ++__k) 272 _M_names[__k] = 0; 273 274 // Name the categories. 275 for (size_t __l = 0; (__l < _S_categories_size 276 && __imp._M_names[__l]); ++__l) 277 { 278 const size_t __len = std::strlen(__imp._M_names[__l]) + 1; 279 _M_names[__l] = new char[__len]; 280 std::memcpy(_M_names[__l], __imp._M_names[__l], __len); 281 } 282 } 283 __catch(...) 284 { 285 this->~_Impl(); 286 __throw_exception_again; 287 } 288 } 289 290 void 291 locale::_Impl:: _M_replace_category(const _Impl * __imp,const locale::id * const * __idpp)292 _M_replace_category(const _Impl* __imp, 293 const locale::id* const* __idpp) 294 { 295 for (; *__idpp; ++__idpp) 296 _M_replace_facet(__imp, *__idpp); 297 } 298 299 void 300 locale::_Impl:: _M_replace_facet(const _Impl * __imp,const locale::id * __idp)301 _M_replace_facet(const _Impl* __imp, const locale::id* __idp) 302 { 303 size_t __index = __idp->_M_id(); 304 if ((__index > (__imp->_M_facets_size - 1)) 305 || !__imp->_M_facets[__index]) 306 __throw_runtime_error(__N("locale::_Impl::_M_replace_facet")); 307 _M_install_facet(__idp, __imp->_M_facets[__index]); 308 } 309 310 void 311 locale::_Impl:: _M_install_facet(const locale::id * __idp,const facet * __fp)312 _M_install_facet(const locale::id* __idp, const facet* __fp) 313 { 314 if (__fp) 315 { 316 size_t __index = __idp->_M_id(); 317 318 // Check size of facet vector to ensure adequate room. 319 if (__index > _M_facets_size - 1) 320 { 321 const size_t __new_size = __index + 4; 322 323 // New facet array. 324 const facet** __oldf = _M_facets; 325 const facet** __newf; 326 __newf = new const facet*[__new_size]; 327 for (size_t __i = 0; __i < _M_facets_size; ++__i) 328 __newf[__i] = _M_facets[__i]; 329 for (size_t __l = _M_facets_size; __l < __new_size; ++__l) 330 __newf[__l] = 0; 331 332 // New cache array. 333 const facet** __oldc = _M_caches; 334 const facet** __newc; 335 __try 336 { 337 __newc = new const facet*[__new_size]; 338 } 339 __catch(...) 340 { 341 delete [] __newf; 342 __throw_exception_again; 343 } 344 for (size_t __j = 0; __j < _M_facets_size; ++__j) 345 __newc[__j] = _M_caches[__j]; 346 for (size_t __k = _M_facets_size; __k < __new_size; ++__k) 347 __newc[__k] = 0; 348 349 _M_facets_size = __new_size; 350 _M_facets = __newf; 351 _M_caches = __newc; 352 delete [] __oldf; 353 delete [] __oldc; 354 } 355 356 __fp->_M_add_reference(); 357 const facet*& __fpr = _M_facets[__index]; 358 if (__fpr) 359 { 360 // Replacing an existing facet. Order matters. 361 __fpr->_M_remove_reference(); 362 __fpr = __fp; 363 } 364 else 365 { 366 // Installing a newly created facet into an empty 367 // _M_facets container, say a newly-constructed, 368 // swanky-fresh _Impl. 369 _M_facets[__index] = __fp; 370 } 371 372 // Ideally, it would be nice to only remove the caches that 373 // are now incorrect. However, some of the caches depend on 374 // multiple facets, and we only know about one facet 375 // here. It's no great loss: the first use of the new facet 376 // will create a new, correctly cached facet anyway. 377 for (size_t __i = 0; __i < _M_facets_size; ++__i) 378 { 379 const facet* __cpr = _M_caches[__i]; 380 if (__cpr) 381 { 382 __cpr->_M_remove_reference(); 383 _M_caches[__i] = 0; 384 } 385 } 386 } 387 } 388 389 void 390 locale::_Impl:: _M_install_cache(const facet * __cache,size_t __index)391 _M_install_cache(const facet* __cache, size_t __index) 392 { 393 __gnu_cxx::__scoped_lock sentry(get_locale_cache_mutex()); 394 if (_M_caches[__index] != 0) 395 { 396 // Some other thread got in first. 397 delete __cache; 398 } 399 else 400 { 401 __cache->_M_add_reference(); 402 _M_caches[__index] = __cache; 403 } 404 } 405 406 // locale::id 407 // Definitions for static const data members of locale::id 408 _Atomic_word locale::id::_S_refcount; // init'd to 0 by linker 409 410 size_t _M_id() const411 locale::id::_M_id() const throw() 412 { 413 if (!_M_index) 414 { 415 // XXX GLIBCXX_ABI Deprecated 416 #ifdef _GLIBCXX_LONG_DOUBLE_COMPAT 417 locale::id *f = 0; 418 # define _GLIBCXX_SYNC_ID(facet, mangled) \ 419 if (this == &::mangled) \ 420 f = &facet::id 421 _GLIBCXX_SYNC_ID (num_get<char>, _ZNSt7num_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE); 422 _GLIBCXX_SYNC_ID (num_put<char>, _ZNSt7num_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE); 423 _GLIBCXX_SYNC_ID (money_get<char>, _ZNSt9money_getIcSt19istreambuf_iteratorIcSt11char_traitsIcEEE2idE); 424 _GLIBCXX_SYNC_ID (money_put<char>, _ZNSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE2idE); 425 # ifdef _GLIBCXX_USE_WCHAR_T 426 _GLIBCXX_SYNC_ID (num_get<wchar_t>, _ZNSt7num_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE); 427 _GLIBCXX_SYNC_ID (num_put<wchar_t>, _ZNSt7num_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE); 428 _GLIBCXX_SYNC_ID (money_get<wchar_t>, _ZNSt9money_getIwSt19istreambuf_iteratorIwSt11char_traitsIwEEE2idE); 429 _GLIBCXX_SYNC_ID (money_put<wchar_t>, _ZNSt9money_putIwSt19ostreambuf_iteratorIwSt11char_traitsIwEEE2idE); 430 # endif 431 if (f) 432 _M_index = 1 + f->_M_id(); 433 else 434 #endif 435 _M_index = 1 + __gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, 436 1); 437 } 438 return _M_index - 1; 439 } 440 441 _GLIBCXX_END_NAMESPACE_VERSION 442 } // namespace 443