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;
72 locale::id::_M_id() const
75 _M_index = 1 + __exchange_and_add(&_S_highwater, 1);
79 // Definitions for static const data members of locale::id
80 _Atomic_word locale::id::_S_highwater; // init'd to 0 by linker
82 // Definitions for static const data members of locale::_Impl
83 const locale::id* const
84 locale::_Impl::_S_id_ctype[] =
86 &std::ctype<char>::id,
87 &codecvt<char, char, mbstate_t>::id,
88 #ifdef _GLIBCXX_USE_WCHAR_T
89 &std::ctype<wchar_t>::id,
90 &codecvt<wchar_t, char, mbstate_t>::id,
95 const locale::id* const
96 locale::_Impl::_S_id_numeric[] =
101 #ifdef _GLIBCXX_USE_WCHAR_T
102 &num_get<wchar_t>::id,
103 &num_put<wchar_t>::id,
104 &numpunct<wchar_t>::id,
109 const locale::id* const
110 locale::_Impl::_S_id_collate[] =
112 &std::collate<char>::id,
113 #ifdef _GLIBCXX_USE_WCHAR_T
114 &std::collate<wchar_t>::id,
119 const locale::id* const
120 locale::_Impl::_S_id_time[] =
122 &__timepunct<char>::id,
125 #ifdef _GLIBCXX_USE_WCHAR_T
126 &__timepunct<wchar_t>::id,
127 &time_get<wchar_t>::id,
128 &time_put<wchar_t>::id,
133 const locale::id* const
134 locale::_Impl::_S_id_monetary[] =
136 &money_get<char>::id,
137 &money_put<char>::id,
138 &moneypunct<char, false>::id,
139 &moneypunct<char, true >::id,
140 #ifdef _GLIBCXX_USE_WCHAR_T
141 &money_get<wchar_t>::id,
142 &money_put<wchar_t>::id,
143 &moneypunct<wchar_t, false>::id,
144 &moneypunct<wchar_t, true >::id,
149 const locale::id* const
150 locale::_Impl::_S_id_messages[] =
152 &std::messages<char>::id,
153 #ifdef _GLIBCXX_USE_WCHAR_T
154 &std::messages<wchar_t>::id,
159 const locale::id* const* const
160 locale::_Impl::_S_facet_categories[] =
162 // Order must match the decl order in class locale.
163 locale::_Impl::_S_id_ctype,
164 locale::_Impl::_S_id_numeric,
165 locale::_Impl::_S_id_collate,
166 locale::_Impl::_S_id_time,
167 locale::_Impl::_S_id_monetary,
168 locale::_Impl::_S_id_messages,
172 locale::locale() throw()
175 (_M_impl = _S_global)->_M_add_reference();
178 locale::locale(const locale& __other) throw()
179 { (_M_impl = __other._M_impl)->_M_add_reference(); }
181 // This is used to initialize global and classic locales, and
182 // assumes that the _Impl objects are constructed correctly.
183 // The lack of a reference increment is intentional.
184 locale::locale(_Impl* __ip) throw() : _M_impl(__ip)
187 locale::locale(const char* __s)
192 if (std::strcmp(__s, "C") == 0 || std::strcmp(__s, "POSIX") == 0)
193 (_M_impl = _S_classic)->_M_add_reference();
194 else if (std::strcmp(__s, "") != 0)
195 _M_impl = new _Impl(__s, 1);
198 // Get it from the environment.
199 char* __env = std::getenv("LC_ALL");
200 // If LC_ALL is set we are done.
201 if (__env && std::strcmp(__env, "") != 0)
203 if (std::strcmp(__env, "C") == 0
204 || std::strcmp(__env, "POSIX") == 0)
205 (_M_impl = _S_classic)->_M_add_reference();
207 _M_impl = new _Impl(__env, 1);
212 // LANG may set a default different from "C".
213 char* __env = std::getenv("LANG");
214 if (!__env || std::strcmp(__env, "") == 0
215 || std::strcmp(__env, "C") == 0
216 || std::strcmp(__env, "POSIX") == 0)
221 // Scan the categories looking for the first one
222 // different from LANG.
225 for (; __i < _S_categories_size; ++__i)
227 __env = std::getenv(_S_categories[__i]);
228 if (__env && std::strcmp(__env, "") != 0
229 && std::strcmp(__env, "C") != 0
230 && std::strcmp(__env, "POSIX") != 0)
234 for (; __i < _S_categories_size; ++__i)
236 __env = std::getenv(_S_categories[__i]);
237 if (__env && std::strcmp(__env, "") != 0
242 // If one is found, build the complete string of
243 // the form LC_CTYPE=xxx;LC_NUMERIC=yyy; and so on...
244 if (__i < _S_categories_size)
247 for (size_t __j = 0; __j < __i; ++__j)
249 __str += _S_categories[__j];
254 __str += _S_categories[__i];
259 for (; __i < _S_categories_size; ++__i)
261 __env = std::getenv(_S_categories[__i]);
262 if (!__env || std::strcmp(__env, "") == 0)
264 __str += _S_categories[__i];
269 else if (std::strcmp(__env, "C") == 0
270 || std::strcmp(__env, "POSIX") == 0)
272 __str += _S_categories[__i];
277 __str += _S_categories[__i];
283 __str.erase(__str.end() - 1);
284 _M_impl = new _Impl(__str.c_str(), 1);
286 // ... otherwise either an additional instance of
287 // the "C" locale or LANG.
288 else if (__res == "C")
289 (_M_impl = _S_classic)->_M_add_reference();
291 _M_impl = new _Impl(__res.c_str(), 1);
296 __throw_runtime_error("locale::locale NULL not valid");
299 locale::locale(const locale& __base, const char* __s, category __cat)
301 // NB: There are complicated, yet more efficient ways to do
302 // this. Building up locales on a per-category way is tedious, so
303 // let's do it this way until people complain.
305 _M_coalesce(__base, __add, __cat);
308 locale::locale(const locale& __base, const locale& __add, category __cat)
309 { _M_coalesce(__base, __add, __cat); }
311 locale::~locale() throw()
312 { _M_impl->_M_remove_reference(); }
315 locale::operator==(const locale& __rhs) const throw()
317 string __name = this->name();
318 return (_M_impl == __rhs._M_impl
319 || (__name != "*" && __name == __rhs.name()));
323 locale::operator=(const locale& __other) throw()
325 __other._M_impl->_M_add_reference();
326 _M_impl->_M_remove_reference();
327 _M_impl = __other._M_impl;
332 locale::global(const locale& __other)
337 _Impl* __old = _S_global;
338 __other._M_impl->_M_add_reference();
339 _S_global = __other._M_impl;
340 if (_S_global->_M_check_same_name()
341 && (std::strcmp(_S_global->_M_names[0], "*") != 0))
342 setlocale(LC_ALL, __other.name().c_str());
344 // Reference count sanity check: one reference removed for the
345 // subsition of __other locale, one added by return-by-value. Net
346 // difference: zero. When the returned locale object's destrutor
347 // is called, then the reference count is decremented and possibly
349 return locale(__old);
356 if (_M_impl->_M_check_same_name())
357 __ret = _M_impl->_M_names[0];
360 __ret += _S_categories[0];
362 __ret += _M_impl->_M_names[0];
363 for (size_t __i = 1; __i < _S_categories_size; ++__i)
366 __ret += _S_categories[__i];
368 __ret += _M_impl->_M_names[__i];
382 locale::_S_initialize_once()
385 // One reference for _S_classic, one for _S_global
386 _S_classic = new (&c_locale_impl) _Impl(2);
387 _S_global = _S_classic;
388 new (&c_locale) locale(_S_classic);
392 locale::_S_initialize()
395 if (__gthread_active_p())
396 __gthread_once(&_S_once, _S_initialize_once);
399 _S_initialize_once();
403 locale::_M_coalesce(const locale& __base, const locale& __add,
406 __cat = _S_normalize_category(__cat);
407 _M_impl = new _Impl(*__base._M_impl, 1);
410 { _M_impl->_M_replace_categories(__add._M_impl, __cat); }
413 _M_impl->_M_remove_reference();
414 __throw_exception_again;
419 locale::_S_normalize_category(category __cat)
422 if (__cat == none || (__cat & all) && !(__cat & ~all))
426 // NB: May be a C-style "LC_ALL" category; convert.
444 #ifdef _GLIBCXX_HAVE_LC_MESSAGES
453 __throw_runtime_error("locale::_S_normalize_category "
454 "category not found");
460 __c_locale locale::facet::_S_c_locale;
462 const char locale::facet::_S_c_name[2] = "C";
465 __gthread_once_t locale::facet::_S_once = __GTHREAD_ONCE_INIT;
472 locale::facet::_S_initialize_once()
474 // Initialize the underlying locale model.
475 _S_create_c_locale(_S_c_locale, _S_c_name);
479 locale::facet::_S_get_c_locale()
482 if (__gthread_active_p())
483 __gthread_once(&_S_once, _S_initialize_once);
488 _S_initialize_once();
494 locale::facet::_S_get_c_name()
495 { return _S_c_name; }
497 // Definitions for static const data members of time_base.
500 __timepunct_cache<char>::_S_timezones[14] =
502 "GMT", "HST", "AKST", "PST", "MST", "CST", "EST", "AST", "NST", "CET",
503 "IST", "EET", "CST", "JST"
506 #ifdef _GLIBCXX_USE_WCHAR_T
509 __timepunct_cache<wchar_t>::_S_timezones[14] =
511 L"GMT", L"HST", L"AKST", L"PST", L"MST", L"CST", L"EST", L"AST",
512 L"NST", L"CET", L"IST", L"EET", L"CST", L"JST"
516 // Definitions for static const data members of money_base.
517 const money_base::pattern
518 money_base::_S_default_pattern = { {symbol, sign, none, value} };
520 const char* __num_base::_S_atoms_in = "-+xX0123456789eEabcdfABCDF";
521 const char* __num_base::_S_atoms_out ="-+xX0123456789abcdef0123456789ABCDEF";
523 // _GLIBCXX_RESOLVE_LIB_DEFECTS
524 // According to the resolution of DR 231, about 22.2.2.2.2, p11,
525 // "str.precision() is specified in the conversion specification".
527 __num_base::_S_format_float(const ios_base& __io, char* __fptr, char __mod)
529 ios_base::fmtflags __flags = __io.flags();
531 // [22.2.2.2.2] Table 60
532 if (__flags & ios_base::showpos)
534 if (__flags & ios_base::showpoint)
537 // As per DR 231: _always_, not only when
538 // __flags & ios_base::fixed || __prec > 0
544 ios_base::fmtflags __fltfield = __flags & ios_base::floatfield;
545 // [22.2.2.2.2] Table 58
546 if (__fltfield == ios_base::fixed)
548 else if (__fltfield == ios_base::scientific)
549 *__fptr++ = (__flags & ios_base::uppercase) ? 'E' : 'e';
551 *__fptr++ = (__flags & ios_base::uppercase) ? 'G' : 'g';