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.
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 // _GLIBCPP_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;
66 const size_t locale::_S_extra_categories_size;
68 // Definitions for static const data members of locale::id
69 _Atomic_word locale::id::_S_highwater; // init'd to 0 by linker
71 // Definitions for static const data members of locale::_Impl
72 const locale::id* const
73 locale::_Impl::_S_id_ctype[] =
75 &std::ctype<char>::id,
76 &codecvt<char, char, mbstate_t>::id,
77 #ifdef _GLIBCPP_USE_WCHAR_T
78 &std::ctype<wchar_t>::id,
79 &codecvt<wchar_t, char, mbstate_t>::id,
84 const locale::id* const
85 locale::_Impl::_S_id_numeric[] =
90 #ifdef _GLIBCPP_USE_WCHAR_T
91 &num_get<wchar_t>::id,
92 &num_put<wchar_t>::id,
93 &numpunct<wchar_t>::id,
98 const locale::id* const
99 locale::_Impl::_S_id_collate[] =
101 &std::collate<char>::id,
102 #ifdef _GLIBCPP_USE_WCHAR_T
103 &std::collate<wchar_t>::id,
108 const locale::id* const
109 locale::_Impl::_S_id_time[] =
111 &__timepunct<char>::id,
114 #ifdef _GLIBCPP_USE_WCHAR_T
115 &__timepunct<wchar_t>::id,
116 &time_get<wchar_t>::id,
117 &time_put<wchar_t>::id,
122 const locale::id* const
123 locale::_Impl::_S_id_monetary[] =
125 &money_get<char>::id,
126 &money_put<char>::id,
127 &moneypunct<char, false>::id,
128 &moneypunct<char, true >::id,
129 #ifdef _GLIBCPP_USE_WCHAR_T
130 &money_get<wchar_t>::id,
131 &money_put<wchar_t>::id,
132 &moneypunct<wchar_t, false>::id,
133 &moneypunct<wchar_t, true >::id,
138 const locale::id* const
139 locale::_Impl::_S_id_messages[] =
141 &std::messages<char>::id,
142 #ifdef _GLIBCPP_USE_WCHAR_T
143 &std::messages<wchar_t>::id,
148 const locale::id* const* const
149 locale::_Impl::_S_facet_categories[] =
151 // Order must match the decl order in class locale.
152 locale::_Impl::_S_id_ctype,
153 locale::_Impl::_S_id_numeric,
154 locale::_Impl::_S_id_collate,
155 locale::_Impl::_S_id_time,
156 locale::_Impl::_S_id_monetary,
157 locale::_Impl::_S_id_messages,
161 locale::locale() throw()
164 (_M_impl = _S_global)->_M_add_reference();
167 locale::locale(const locale& __other) throw()
168 { (_M_impl = __other._M_impl)->_M_add_reference(); }
170 // This is used to initialize global and classic locales, and
171 // assumes that the _Impl objects are constructed correctly.
172 // The lack of a reference increment is intentional.
173 locale::locale(_Impl* __ip) throw() : _M_impl(__ip)
176 locale::locale(const char* __s)
181 if (strcmp(__s, "C") == 0 || strcmp(__s, "POSIX") == 0)
182 (_M_impl = _S_classic)->_M_add_reference();
183 else if (strcmp(__s, "") != 0)
184 _M_impl = new _Impl(__s, 1);
187 // Get it from the environment.
188 char* __env = getenv("LC_ALL");
189 // If LC_ALL is set we are done.
190 if (__env && strcmp(__env, "") != 0)
192 if (strcmp(__env, "C") == 0 || strcmp(__env, "POSIX") == 0)
193 (_M_impl = _S_classic)->_M_add_reference();
195 _M_impl = new _Impl(__env, 1);
200 // LANG may set a default different from "C".
201 char* __env = getenv("LANG");
202 if (!__env || strcmp(__env, "") == 0 || strcmp(__env, "C") == 0
203 || strcmp(__env, "POSIX") == 0)
206 __res = strdup(__env);
208 // Scan the categories looking for the first one
209 // different from LANG.
211 if (strcmp(__res, "C") == 0)
212 for (; __i < _S_categories_size
213 + _S_extra_categories_size; ++__i)
215 __env = getenv(_S_categories[__i]);
216 if (__env && strcmp(__env, "") != 0
217 && strcmp(__env, "C") != 0
218 && strcmp(__env, "POSIX") != 0)
222 for (; __i < _S_categories_size
223 + _S_extra_categories_size; ++__i)
225 __env = getenv(_S_categories[__i]);
226 if (__env && strcmp(__env, "") != 0
227 && strcmp(__env, __res) != 0)
231 // If one is found, build the complete string of
232 // the form LC_CTYPE=xxx;LC_NUMERIC=yyy; and so on...
233 if (__i < _S_categories_size + _S_extra_categories_size)
236 for (size_t __j = 0; __j < __i; ++__j)
238 __str += _S_categories[__j];
243 __str += _S_categories[__i];
248 for (; __i < _S_categories_size
249 + _S_extra_categories_size; ++__i)
251 __env = getenv(_S_categories[__i]);
252 if (!__env || strcmp(__env, "") == 0)
254 __str += _S_categories[__i];
259 else if (strcmp(__env, "C") == 0
260 || strcmp(__env, "POSIX") == 0)
262 __str += _S_categories[__i];
267 __str += _S_categories[__i];
273 __str.erase(__str.end() - 1);
274 _M_impl = new _Impl(__str.c_str(), 1);
276 // ... otherwise either an additional instance of
277 // the "C" locale or LANG.
278 else if (strcmp(__res, "C") == 0)
279 (_M_impl = _S_classic)->_M_add_reference();
281 _M_impl = new _Impl(__res, 1);
287 __throw_runtime_error("attempt to create locale from NULL name");
290 locale::locale(const locale& __base, const char* __s, category __cat)
292 // NB: There are complicated, yet more efficient ways to do
293 // this. Building up locales on a per-category way is tedious, so
294 // let's do it this way until people complain.
296 _M_coalesce(__base, __add, __cat);
299 locale::locale(const locale& __base, const locale& __add, category __cat)
300 { _M_coalesce(__base, __add, __cat); }
302 locale::~locale() throw()
303 { _M_impl->_M_remove_reference(); }
306 locale::operator==(const locale& __rhs) const throw()
308 string __name = this->name();
309 return (_M_impl == __rhs._M_impl
310 || (__name != "*" && __name == __rhs.name()));
314 locale::operator=(const locale& __other) throw()
316 __other._M_impl->_M_add_reference();
317 _M_impl->_M_remove_reference();
318 _M_impl = __other._M_impl;
323 locale::global(const locale& __other)
327 _Impl* __old = _S_global;
328 __other._M_impl->_M_add_reference();
329 _S_global = __other._M_impl;
330 if (_S_global->_M_check_same_name()
331 && (strcmp(_S_global->_M_names[0], "*") != 0))
332 setlocale(LC_ALL, __other.name().c_str());
334 // Reference count sanity check: one reference removed for the
335 // subsition of __other locale, one added by return-by-value. Net
336 // difference: zero. When the returned locale object's destrutor
337 // is called, then the reference count is decremented and possibly
339 return locale(__old);
346 if (_M_impl->_M_check_same_name())
347 __ret = _M_impl->_M_names[0];
350 __ret += _S_categories[0];
352 __ret += _M_impl->_M_names[0];
354 __i < _S_categories_size + _S_extra_categories_size;
358 __ret += _S_categories[__i];
360 __ret += _M_impl->_M_names[__i];
369 // Locking protocol: singleton-called-before-threading-starts
374 // 26 Standard facets, 2 references.
375 // One reference for _S_classic, one for _S_global
376 _S_classic = new (&c_locale_impl) _Impl(0, 2, true);
377 _S_global = _S_classic;
378 new (&c_locale) locale(_S_classic);
382 // Just call destructor, so that locale_impl_c's memory is
383 // not deallocated via a call to delete.
385 _S_classic->~_Impl();
386 _S_classic = _S_global = 0;
387 __throw_exception_again;
394 locale::_M_coalesce(const locale& __base, const locale& __add,
397 __cat = _S_normalize_category(__cat);
398 _M_impl = new _Impl(*__base._M_impl, 1);
401 { _M_impl->_M_replace_categories(__add._M_impl, __cat); }
404 _M_impl->_M_remove_reference();
405 __throw_exception_again;
410 locale::_S_normalize_category(category __cat)
413 if (__cat == none || (__cat & all) && !(__cat & ~all))
417 // NB: May be a C-style "LC_ALL" category; convert.
435 #ifdef _GLIBCPP_HAVE_LC_MESSAGES
444 __throw_runtime_error("bad locale category");
451 locale::facet::_S_c_locale;
453 char locale::facet::_S_c_name[2];
459 facet(size_t __refs) throw() : _M_references(__refs ? 1 : 0)
464 _M_add_reference() throw()
465 { __atomic_add(&_M_references, 1); }
469 _M_remove_reference() throw()
471 if (__exchange_and_add(&_M_references, -1) == 1)
483 // Definitions for static const data members of time_base
486 __timepunct<char>::_S_timezones[14] =
488 "GMT", "HST", "AKST", "PST", "MST", "CST", "EST", "AST", "NST", "CET",
489 "IST", "EET", "CST", "JST"
492 #ifdef _GLIBCPP_USE_WCHAR_T
495 __timepunct<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[] = "0123456789eEabcdfABCDF";
509 __num_base::_S_format_float(const ios_base& __io, char* __fptr, char __mod,
512 bool __incl_prec = false;
513 ios_base::fmtflags __flags = __io.flags();
515 // [22.2.2.2.2] Table 60
516 if (__flags & ios_base::showpos)
518 if (__flags & ios_base::showpoint)
520 // As per [22.2.2.2.2.11]
521 if (__flags & ios_base::fixed || __prec > 0)
529 ios_base::fmtflags __fltfield = __flags & ios_base::floatfield;
530 // [22.2.2.2.2] Table 58
531 if (__fltfield == ios_base::fixed)
533 else if (__fltfield == ios_base::scientific)
534 *__fptr++ = (__flags & ios_base::uppercase) ? 'E' : 'e';
536 *__fptr++ = (__flags & ios_base::uppercase) ? 'G' : 'g';
542 __num_base::_S_format_int(const ios_base& __io, char* __fptr, char __mod,
545 ios_base::fmtflags __flags = __io.flags();
547 // [22.2.2.2.2] Table 60
548 if (__flags & ios_base::showpos)
550 if (__flags & ios_base::showbase)
554 // For long long types.
558 ios_base::fmtflags __bsefield = __flags & ios_base::basefield;
559 if (__bsefield == ios_base::hex)
560 *__fptr++ = (__flags & ios_base::uppercase) ? 'X' : 'x';
561 else if (__bsefield == ios_base::oct)