1 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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, free.
33 #include <cwctype> // For towupper, etc.
35 #include <bits/atomicity.h>
39 // Defined in globals.cc.
40 extern std::locale c_locale;
41 extern std::locale::_Impl c_locale_impl;
42 } // namespace __gnu_cxx
46 using namespace __gnu_cxx;
48 // Definitions for static const data members of locale.
49 const locale::category locale::none;
50 const locale::category locale::ctype;
51 const locale::category locale::numeric;
52 const locale::category locale::collate;
53 const locale::category locale::time;
54 const locale::category locale::monetary;
55 const locale::category locale::messages;
56 const locale::category locale::all;
58 // In the future, GLIBCXX_ABI > 5 should remove all uses of
59 // _GLIBCXX_ASM_SYMVER in this file, and remove exports of any
60 // static data members of locale.
62 // These are no longer exported.
63 locale::_Impl* locale::_S_classic;
64 locale::_Impl* locale::_S_global;
65 const size_t locale::_S_categories_size;
68 __gthread_once_t locale::_S_once = __GTHREAD_ONCE_INIT;
71 // Definitions for static const data members of locale::id
72 _Atomic_word locale::id::_S_highwater; // init'd to 0 by linker
74 // Definitions for static const data members of locale::_Impl
75 const locale::id* const
76 locale::_Impl::_S_id_ctype[] =
78 &std::ctype<char>::id,
79 &codecvt<char, char, mbstate_t>::id,
80 #ifdef _GLIBCXX_USE_WCHAR_T
81 &std::ctype<wchar_t>::id,
82 &codecvt<wchar_t, char, mbstate_t>::id,
87 const locale::id* const
88 locale::_Impl::_S_id_numeric[] =
93 #ifdef _GLIBCXX_USE_WCHAR_T
94 &num_get<wchar_t>::id,
95 &num_put<wchar_t>::id,
96 &numpunct<wchar_t>::id,
101 const locale::id* const
102 locale::_Impl::_S_id_collate[] =
104 &std::collate<char>::id,
105 #ifdef _GLIBCXX_USE_WCHAR_T
106 &std::collate<wchar_t>::id,
111 const locale::id* const
112 locale::_Impl::_S_id_time[] =
114 &__timepunct<char>::id,
117 #ifdef _GLIBCXX_USE_WCHAR_T
118 &__timepunct<wchar_t>::id,
119 &time_get<wchar_t>::id,
120 &time_put<wchar_t>::id,
125 const locale::id* const
126 locale::_Impl::_S_id_monetary[] =
128 &money_get<char>::id,
129 &money_put<char>::id,
130 &moneypunct<char, false>::id,
131 &moneypunct<char, true >::id,
132 #ifdef _GLIBCXX_USE_WCHAR_T
133 &money_get<wchar_t>::id,
134 &money_put<wchar_t>::id,
135 &moneypunct<wchar_t, false>::id,
136 &moneypunct<wchar_t, true >::id,
141 const locale::id* const
142 locale::_Impl::_S_id_messages[] =
144 &std::messages<char>::id,
145 #ifdef _GLIBCXX_USE_WCHAR_T
146 &std::messages<wchar_t>::id,
151 const locale::id* const* const
152 locale::_Impl::_S_facet_categories[] =
154 // Order must match the decl order in class locale.
155 locale::_Impl::_S_id_ctype,
156 locale::_Impl::_S_id_numeric,
157 locale::_Impl::_S_id_collate,
158 locale::_Impl::_S_id_time,
159 locale::_Impl::_S_id_monetary,
160 locale::_Impl::_S_id_messages,
164 locale::locale() throw()
167 (_M_impl = _S_global)->_M_add_reference();
170 locale::locale(const locale& __other) throw()
171 { (_M_impl = __other._M_impl)->_M_add_reference(); }
173 // This is used to initialize global and classic locales, and
174 // assumes that the _Impl objects are constructed correctly.
175 // The lack of a reference increment is intentional.
176 locale::locale(_Impl* __ip) throw() : _M_impl(__ip)
179 locale::locale(const char* __s)
184 if (std::strcmp(__s, "C") == 0 || std::strcmp(__s, "POSIX") == 0)
185 (_M_impl = _S_classic)->_M_add_reference();
186 else if (std::strcmp(__s, "") != 0)
187 _M_impl = new _Impl(__s, 1);
190 // Get it from the environment.
191 char* __env = std::getenv("LC_ALL");
192 // If LC_ALL is set we are done.
193 if (__env && std::strcmp(__env, "") != 0)
195 if (std::strcmp(__env, "C") == 0
196 || std::strcmp(__env, "POSIX") == 0)
197 (_M_impl = _S_classic)->_M_add_reference();
199 _M_impl = new _Impl(__env, 1);
204 // LANG may set a default different from "C".
205 char* __env = std::getenv("LANG");
206 if (!__env || std::strcmp(__env, "") == 0
207 || std::strcmp(__env, "C") == 0
208 || std::strcmp(__env, "POSIX") == 0)
211 __res = strdup(__env);
213 // Scan the categories looking for the first one
214 // different from LANG.
216 if (std::strcmp(__res, "C") == 0)
217 for (; __i < _S_categories_size; ++__i)
219 __env = std::getenv(_S_categories[__i]);
220 if (__env && std::strcmp(__env, "") != 0
221 && std::strcmp(__env, "C") != 0
222 && std::strcmp(__env, "POSIX") != 0)
226 for (; __i < _S_categories_size; ++__i)
228 __env = std::getenv(_S_categories[__i]);
229 if (__env && std::strcmp(__env, "") != 0
230 && std::strcmp(__env, __res) != 0)
234 // If one is found, build the complete string of
235 // the form LC_CTYPE=xxx;LC_NUMERIC=yyy; and so on...
236 if (__i < _S_categories_size)
239 for (size_t __j = 0; __j < __i; ++__j)
241 __str += _S_categories[__j];
246 __str += _S_categories[__i];
251 for (; __i < _S_categories_size; ++__i)
253 __env = std::getenv(_S_categories[__i]);
254 if (!__env || std::strcmp(__env, "") == 0)
256 __str += _S_categories[__i];
261 else if (std::strcmp(__env, "C") == 0
262 || std::strcmp(__env, "POSIX") == 0)
264 __str += _S_categories[__i];
269 __str += _S_categories[__i];
275 __str.erase(__str.end() - 1);
276 _M_impl = new _Impl(__str.c_str(), 1);
278 // ... otherwise either an additional instance of
279 // the "C" locale or LANG.
280 else if (std::strcmp(__res, "C") == 0)
281 (_M_impl = _S_classic)->_M_add_reference();
283 _M_impl = new _Impl(__res, 1);
289 __throw_runtime_error("locale::locale NULL not valid");
292 locale::locale(const locale& __base, const char* __s, category __cat)
294 // NB: There are complicated, yet more efficient ways to do
295 // this. Building up locales on a per-category way is tedious, so
296 // let's do it this way until people complain.
298 _M_coalesce(__base, __add, __cat);
301 locale::locale(const locale& __base, const locale& __add, category __cat)
302 { _M_coalesce(__base, __add, __cat); }
304 locale::~locale() throw()
305 { _M_impl->_M_remove_reference(); }
308 locale::operator==(const locale& __rhs) const throw()
310 string __name = this->name();
311 return (_M_impl == __rhs._M_impl
312 || (__name != "*" && __name == __rhs.name()));
316 locale::operator=(const locale& __other) throw()
318 __other._M_impl->_M_add_reference();
319 _M_impl->_M_remove_reference();
320 _M_impl = __other._M_impl;
325 locale::global(const locale& __other)
330 _Impl* __old = _S_global;
331 __other._M_impl->_M_add_reference();
332 _S_global = __other._M_impl;
333 if (_S_global->_M_check_same_name()
334 && (std::strcmp(_S_global->_M_names[0], "*") != 0))
335 setlocale(LC_ALL, __other.name().c_str());
337 // Reference count sanity check: one reference removed for the
338 // subsition of __other locale, one added by return-by-value. Net
339 // difference: zero. When the returned locale object's destrutor
340 // is called, then the reference count is decremented and possibly
342 return locale(__old);
349 if (_M_impl->_M_check_same_name())
350 __ret = _M_impl->_M_names[0];
353 __ret += _S_categories[0];
355 __ret += _M_impl->_M_names[0];
356 for (size_t __i = 1; __i < _S_categories_size; ++__i)
359 __ret += _S_categories[__i];
361 __ret += _M_impl->_M_names[__i];
375 locale::_S_initialize_once()
378 // One reference for _S_classic, one for _S_global
379 _S_classic = new (&c_locale_impl) _Impl(2);
380 _S_global = _S_classic;
381 new (&c_locale) locale(_S_classic);
385 locale::_S_initialize()
388 __gthread_once(&_S_once, _S_initialize_once);
391 _S_initialize_once();
396 locale::_M_coalesce(const locale& __base, const locale& __add,
399 __cat = _S_normalize_category(__cat);
400 _M_impl = new _Impl(*__base._M_impl, 1);
403 { _M_impl->_M_replace_categories(__add._M_impl, __cat); }
406 _M_impl->_M_remove_reference();
407 __throw_exception_again;
412 locale::_S_normalize_category(category __cat)
415 if (__cat == none || (__cat & all) && !(__cat & ~all))
419 // NB: May be a C-style "LC_ALL" category; convert.
437 #ifdef _GLIBCXX_HAVE_LC_MESSAGES
446 __throw_runtime_error("locale::_S_normalize_category "
447 "category not found");
453 __c_locale locale::facet::_S_c_locale;
455 const char locale::facet::_S_c_name[2] = "C";
458 __gthread_once_t locale::facet::_S_once = __GTHREAD_ONCE_INIT;
465 locale::facet::_S_initialize_once()
467 // Initialize the underlying locale model.
468 _S_create_c_locale(_S_c_locale, _S_c_name);
472 locale::facet::_S_get_c_locale()
475 __gthread_once(&_S_once, _S_initialize_once);
478 _S_initialize_once();
483 // Definitions for static const data members of time_base.
486 __timepunct_cache<char>::_S_timezones[14] =
488 "GMT", "HST", "AKST", "PST", "MST", "CST", "EST", "AST", "NST", "CET",
489 "IST", "EET", "CST", "JST"
492 #ifdef _GLIBCXX_USE_WCHAR_T
495 __timepunct_cache<wchar_t>::_S_timezones[14] =
497 L"GMT", L"HST", L"AKST", L"PST", L"MST", L"CST", L"EST", L"AST",
498 L"NST", L"CET", L"IST", L"EET", L"CST", L"JST"
502 // Definitions for static const data members of money_base.
503 const money_base::pattern
504 money_base::_S_default_pattern = { {symbol, sign, none, value} };
506 const char* __num_base::_S_atoms_in = "-+xX0123456789eEabcdfABCDF";
507 const char* __num_base::_S_atoms_out ="-+xX0123456789abcdef0123456789ABCDEF";
509 // _GLIBCXX_RESOLVE_LIB_DEFECTS
510 // According to the resolution of DR 231, about 22.2.2.2.2, p11,
511 // "str.precision() is specified in the conversion specification".
513 __num_base::_S_format_float(const ios_base& __io, char* __fptr, char __mod)
515 ios_base::fmtflags __flags = __io.flags();
517 // [22.2.2.2.2] Table 60
518 if (__flags & ios_base::showpos)
520 if (__flags & ios_base::showpoint)
523 // As per DR 231: _always_, not only when
524 // __flags & ios_base::fixed || __prec > 0
530 ios_base::fmtflags __fltfield = __flags & ios_base::floatfield;
531 // [22.2.2.2.2] Table 58
532 if (__fltfield == ios_base::fixed)
534 else if (__fltfield == ios_base::scientific)
535 *__fptr++ = (__flags & ios_base::uppercase) ? 'E' : 'e';
537 *__fptr++ = (__flags & ios_base::uppercase) ? 'G' : 'g';