1 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
2 // Free Software Foundation, Inc.
4 // This file is part of the GNU ISO C++ Library. This library is free
5 // software; you can redistribute it and/or modify it under the
6 // terms of the GNU General Public License as published by the
7 // Free Software Foundation; either version 2, or (at your option)
10 // This 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
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License along
16 // with this library; see the file COPYING. If not, write to the Free
17 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
20 // As a special exception, you may use this file as part of a free software
21 // library without restriction. Specifically, if other files instantiate
22 // templates or use macros or inline functions from this file, or you compile
23 // this file and link it with other files to produce an executable, this
24 // file does not by itself cause the resulting executable to be covered by
25 // the GNU General Public License. This exception does not however
26 // invalidate any other reasons why the executable file might be covered by
27 // the GNU General Public License.
31 #include <cstdlib> // For getenv
33 #include <cwctype> // For towupper, etc.
35 #include <bits/atomicity.h>
36 #include <bits/concurrence.h>
38 namespace __gnu_internal
40 // Mutex object for cache access
41 static __glibcxx_mutex_define_initialized(locale_cache_mutex);
46 // Definitions for static const data members of locale.
47 const locale::category locale::none;
48 const locale::category locale::ctype;
49 const locale::category locale::numeric;
50 const locale::category locale::collate;
51 const locale::category locale::time;
52 const locale::category locale::monetary;
53 const locale::category locale::messages;
54 const locale::category locale::all;
56 // These are no longer exported.
57 locale::_Impl* locale::_S_classic;
58 locale::_Impl* locale::_S_global;
59 const size_t locale::_S_categories_size;
62 __gthread_once_t locale::_S_once = __GTHREAD_ONCE_INIT;
65 locale::locale(const locale& __other) throw()
66 : _M_impl(__other._M_impl)
67 { _M_impl->_M_add_reference(); }
69 // This is used to initialize global and classic locales, and
70 // assumes that the _Impl objects are constructed correctly.
71 // The lack of a reference increment is intentional.
72 locale::locale(_Impl* __ip) throw() : _M_impl(__ip)
75 locale::~locale() throw()
76 { _M_impl->_M_remove_reference(); }
79 locale::operator==(const locale& __rhs) const throw()
81 // Deal first with the common cases, fast to process: refcopies,
82 // unnamed (i.e., !_M_names[0]), "simple" (!_M_names[1] => all the
83 // categories same name, i.e., _M_names[0]). Otherwise fall back
84 // to the general locale::name().
86 if (_M_impl == __rhs._M_impl)
88 else if (!_M_impl->_M_names[0] || !__rhs._M_impl->_M_names[0]
89 || std::strcmp(_M_impl->_M_names[0],
90 __rhs._M_impl->_M_names[0]) != 0)
92 else if (!_M_impl->_M_names[1] && !__rhs._M_impl->_M_names[1])
95 __ret = this->name() == __rhs.name();
100 locale::operator=(const locale& __other) throw()
102 __other._M_impl->_M_add_reference();
103 _M_impl->_M_remove_reference();
104 _M_impl = __other._M_impl;
112 if (!_M_impl->_M_names[0])
114 else if (_M_impl->_M_check_same_name())
115 __ret = _M_impl->_M_names[0];
119 __ret += _S_categories[0];
121 __ret += _M_impl->_M_names[0];
122 for (size_t __i = 1; __i < _S_categories_size; ++__i)
125 __ret += _S_categories[__i];
127 __ret += _M_impl->_M_names[__i];
134 locale::_S_normalize_category(category __cat)
137 if (__cat == none || (__cat & all) && !(__cat & ~all))
141 // NB: May be a C-style "LC_ALL" category; convert.
159 #ifdef _GLIBCXX_HAVE_LC_MESSAGES
168 __throw_runtime_error(__N("locale::_S_normalize_category "
169 "category not found"));
176 __c_locale locale::facet::_S_c_locale;
178 const char locale::facet::_S_c_name[2] = "C";
181 __gthread_once_t locale::facet::_S_once = __GTHREAD_ONCE_INIT;
185 locale::facet::_S_initialize_once()
187 // Initialize the underlying locale model.
188 _S_create_c_locale(_S_c_locale, _S_c_name);
192 locale::facet::_S_get_c_locale()
195 if (__gthread_active_p())
196 __gthread_once(&_S_once, _S_initialize_once);
201 _S_initialize_once();
207 locale::facet::_S_get_c_name()
208 { return _S_c_name; }
218 for (size_t __i = 0; __i < _M_facets_size; ++__i)
220 _M_facets[__i]->_M_remove_reference();
224 for (size_t __i = 0; __i < _M_facets_size; ++__i)
226 _M_caches[__i]->_M_remove_reference();
230 for (size_t __i = 0; __i < _S_categories_size; ++__i)
231 delete [] _M_names[__i];
235 // Clone existing _Impl object.
237 _Impl(const _Impl& __imp, size_t __refs)
238 : _M_refcount(__refs), _M_facets(0), _M_facets_size(__imp._M_facets_size),
239 _M_caches(0), _M_names(0)
243 _M_facets = new const facet*[_M_facets_size];
244 for (size_t __i = 0; __i < _M_facets_size; ++__i)
246 _M_facets[__i] = __imp._M_facets[__i];
248 _M_facets[__i]->_M_add_reference();
250 _M_caches = new const facet*[_M_facets_size];
251 for (size_t __j = 0; __j < _M_facets_size; ++__j)
253 _M_caches[__j] = __imp._M_caches[__j];
255 _M_caches[__j]->_M_add_reference();
257 _M_names = new char*[_S_categories_size];
258 for (size_t __k = 0; __k < _S_categories_size; ++__k)
261 // Name the categories.
262 for (size_t __l = 0; (__l < _S_categories_size
263 && __imp._M_names[__l]); ++__l)
265 const size_t __len = std::strlen(__imp._M_names[__l]) + 1;
266 _M_names[__l] = new char[__len];
267 std::memcpy(_M_names[__l], __imp._M_names[__l], __len);
273 __throw_exception_again;
279 _M_replace_category(const _Impl* __imp,
280 const locale::id* const* __idpp)
282 for (; *__idpp; ++__idpp)
283 _M_replace_facet(__imp, *__idpp);
288 _M_replace_facet(const _Impl* __imp, const locale::id* __idp)
290 size_t __index = __idp->_M_id();
291 if ((__index > (__imp->_M_facets_size - 1))
292 || !__imp->_M_facets[__index])
293 __throw_runtime_error(__N("locale::_Impl::_M_replace_facet"));
294 _M_install_facet(__idp, __imp->_M_facets[__index]);
299 _M_install_facet(const locale::id* __idp, const facet* __fp)
303 size_t __index = __idp->_M_id();
305 // Check size of facet vector to ensure adequate room.
306 if (__index > _M_facets_size - 1)
308 const size_t __new_size = __index + 4;
311 const facet** __oldf = _M_facets;
312 const facet** __newf;
313 __newf = new const facet*[__new_size];
314 for (size_t __i = 0; __i < _M_facets_size; ++__i)
315 __newf[__i] = _M_facets[__i];
316 for (size_t __l = _M_facets_size; __l < __new_size; ++__l)
320 const facet** __oldc = _M_caches;
321 const facet** __newc;
324 __newc = new const facet*[__new_size];
329 __throw_exception_again;
331 for (size_t __j = 0; __j < _M_facets_size; ++__j)
332 __newc[__j] = _M_caches[__j];
333 for (size_t __k = _M_facets_size; __k < __new_size; ++__k)
336 _M_facets_size = __new_size;
343 __fp->_M_add_reference();
344 const facet*& __fpr = _M_facets[__index];
347 // Replacing an existing facet. Order matters.
348 __fpr->_M_remove_reference();
353 // Installing a newly created facet into an empty
354 // _M_facets container, say a newly-constructed,
355 // swanky-fresh _Impl.
356 _M_facets[__index] = __fp;
359 // Ideally, it would be nice to only remove the caches that
360 // are now incorrect. However, some of the caches depend on
361 // multiple facets, and we only know about one facet
362 // here. It's no great loss: the first use of the new facet
363 // will create a new, correctly cached facet anyway.
364 for (size_t __i = 0; __i < _M_facets_size; ++__i)
366 const facet* __cpr = _M_caches[__i];
369 __cpr->_M_remove_reference();
378 _M_install_cache(const facet* __cache, size_t __index)
380 __gnu_cxx::lock sentry(__gnu_internal::locale_cache_mutex);
381 if (_M_caches[__index] != 0)
383 // Some other thread got in first.
388 __cache->_M_add_reference();
389 _M_caches[__index] = __cache;
394 // Definitions for static const data members of locale::id
395 _Atomic_word locale::id::_S_refcount; // init'd to 0 by linker
398 locale::id::_M_id() const
401 _M_index = 1 + __gnu_cxx::__exchange_and_add(&_S_refcount, 1);