1 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
2 // Free Software Foundation, Inc.
3 //
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)
8 // any later version.
9
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.
14
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,
18 // USA.
19
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.
28
29 #include <clocale>
30 #include <cstring>
31 #include <cstdlib> // For getenv, free.
32 #include <cctype>
33 #include <cwctype> // For towupper, etc.
34 #include <locale>
35 #include <ext/concurrence.h>
36
37 namespace
38 {
39 __gnu_cxx::__mutex&
get_locale_mutex()40 get_locale_mutex()
41 {
42 static __gnu_cxx::__mutex locale_mutex;
43 return locale_mutex;
44 }
45
46 using namespace std;
47
48 typedef char fake_locale_Impl[sizeof(locale::_Impl)]
49 __attribute__ ((aligned(__alignof__(locale::_Impl))));
50 fake_locale_Impl c_locale_impl;
51
52 typedef char fake_locale[sizeof(locale)]
53 __attribute__ ((aligned(__alignof__(locale))));
54 fake_locale c_locale;
55
56 typedef char fake_name_vec[sizeof(char*)]
57 __attribute__ ((aligned(__alignof__(char*))));
58 fake_name_vec name_vec[6 + _GLIBCXX_NUM_CATEGORIES];
59
60 typedef char fake_names[sizeof(char[2])]
61 __attribute__ ((aligned(__alignof__(char[2]))));
62 fake_names name_c[6 + _GLIBCXX_NUM_CATEGORIES];
63
64 typedef char fake_facet_vec[sizeof(locale::facet*)]
65 __attribute__ ((aligned(__alignof__(locale::facet*))));
66 fake_facet_vec facet_vec[_GLIBCXX_NUM_FACETS];
67
68 typedef char fake_cache_vec[sizeof(locale::facet*)]
69 __attribute__ ((aligned(__alignof__(locale::facet*))));
70 fake_cache_vec cache_vec[_GLIBCXX_NUM_FACETS];
71
72 typedef char fake_ctype_c[sizeof(std::ctype<char>)]
73 __attribute__ ((aligned(__alignof__(std::ctype<char>))));
74 fake_ctype_c ctype_c;
75
76 typedef char fake_collate_c[sizeof(std::collate<char>)]
77 __attribute__ ((aligned(__alignof__(std::collate<char>))));
78 fake_collate_c collate_c;
79
80 typedef char fake_numpunct_c[sizeof(numpunct<char>)]
81 __attribute__ ((aligned(__alignof__(numpunct<char>))));
82 fake_numpunct_c numpunct_c;
83
84 typedef char fake_num_get_c[sizeof(num_get<char>)]
85 __attribute__ ((aligned(__alignof__(num_get<char>))));
86 fake_num_get_c num_get_c;
87
88 typedef char fake_num_put_c[sizeof(num_put<char>)]
89 __attribute__ ((aligned(__alignof__(num_put<char>))));
90 fake_num_put_c num_put_c;
91
92 typedef char fake_codecvt_c[sizeof(codecvt<char, char, mbstate_t>)]
93 __attribute__ ((aligned(__alignof__(codecvt<char, char, mbstate_t>))));
94 fake_codecvt_c codecvt_c;
95
96 typedef char fake_moneypunct_c[sizeof(moneypunct<char, true>)]
97 __attribute__ ((aligned(__alignof__(moneypunct<char, true>))));
98 fake_moneypunct_c moneypunct_ct;
99 fake_moneypunct_c moneypunct_cf;
100
101 typedef char fake_money_get_c[sizeof(money_get<char>)]
102 __attribute__ ((aligned(__alignof__(money_get<char>))));
103 fake_money_get_c money_get_c;
104
105 typedef char fake_money_put_c[sizeof(money_put<char>)]
106 __attribute__ ((aligned(__alignof__(money_put<char>))));
107 fake_money_put_c money_put_c;
108
109 typedef char fake_timepunct_c[sizeof(__timepunct<char>)]
110 __attribute__ ((aligned(__alignof__(__timepunct<char>))));
111 fake_timepunct_c timepunct_c;
112
113 typedef char fake_time_get_c[sizeof(time_get<char>)]
114 __attribute__ ((aligned(__alignof__(time_get<char>))));
115 fake_time_get_c time_get_c;
116
117 typedef char fake_time_put_c[sizeof(time_put<char>)]
118 __attribute__ ((aligned(__alignof__(time_put<char>))));
119 fake_time_put_c time_put_c;
120
121 typedef char fake_messages_c[sizeof(messages<char>)]
122 __attribute__ ((aligned(__alignof__(messages<char>))));
123 fake_messages_c messages_c;
124
125 #ifdef _GLIBCXX_USE_WCHAR_T
126 typedef char fake_wtype_w[sizeof(std::ctype<wchar_t>)]
127 __attribute__ ((aligned(__alignof__(std::ctype<wchar_t>))));
128 fake_wtype_w ctype_w;
129
130 typedef char fake_wollate_w[sizeof(std::collate<wchar_t>)]
131 __attribute__ ((aligned(__alignof__(std::collate<wchar_t>))));
132 fake_wollate_w collate_w;
133
134 typedef char fake_numpunct_w[sizeof(numpunct<wchar_t>)]
135 __attribute__ ((aligned(__alignof__(numpunct<wchar_t>))));
136 fake_numpunct_w numpunct_w;
137
138 typedef char fake_num_get_w[sizeof(num_get<wchar_t>)]
139 __attribute__ ((aligned(__alignof__(num_get<wchar_t>))));
140 fake_num_get_w num_get_w;
141
142 typedef char fake_num_put_w[sizeof(num_put<wchar_t>)]
143 __attribute__ ((aligned(__alignof__(num_put<wchar_t>))));
144 fake_num_put_w num_put_w;
145
146 typedef char fake_wodecvt_w[sizeof(codecvt<wchar_t, char, mbstate_t>)]
147 __attribute__ ((aligned(__alignof__(codecvt<wchar_t, char, mbstate_t>))));
148 fake_wodecvt_w codecvt_w;
149
150 typedef char fake_moneypunct_w[sizeof(moneypunct<wchar_t, true>)]
151 __attribute__ ((aligned(__alignof__(moneypunct<wchar_t, true>))));
152 fake_moneypunct_w moneypunct_wt;
153 fake_moneypunct_w moneypunct_wf;
154
155 typedef char fake_money_get_w[sizeof(money_get<wchar_t>)]
156 __attribute__ ((aligned(__alignof__(money_get<wchar_t>))));
157 fake_money_get_w money_get_w;
158
159 typedef char fake_money_put_w[sizeof(money_put<wchar_t>)]
160 __attribute__ ((aligned(__alignof__(money_put<wchar_t>))));
161 fake_money_put_w money_put_w;
162
163 typedef char fake_timepunct_w[sizeof(__timepunct<wchar_t>)]
164 __attribute__ ((aligned(__alignof__(__timepunct<wchar_t>))));
165 fake_timepunct_w timepunct_w;
166
167 typedef char fake_time_get_w[sizeof(time_get<wchar_t>)]
168 __attribute__ ((aligned(__alignof__(time_get<wchar_t>))));
169 fake_time_get_w time_get_w;
170
171 typedef char fake_time_put_w[sizeof(time_put<wchar_t>)]
172 __attribute__ ((aligned(__alignof__(time_put<wchar_t>))));
173 fake_time_put_w time_put_w;
174
175 typedef char fake_messages_w[sizeof(messages<wchar_t>)]
176 __attribute__ ((aligned(__alignof__(messages<wchar_t>))));
177 fake_messages_w messages_w;
178 #endif
179
180 // Storage for "C" locale caches.
181 typedef char fake_num_cache_c[sizeof(std::__numpunct_cache<char>)]
182 __attribute__ ((aligned(__alignof__(std::__numpunct_cache<char>))));
183 fake_num_cache_c numpunct_cache_c;
184
185 typedef char fake_money_cache_c[sizeof(std::__moneypunct_cache<char, true>)]
186 __attribute__ ((aligned(__alignof__(std::__moneypunct_cache<char, true>))));
187 fake_money_cache_c moneypunct_cache_ct;
188 fake_money_cache_c moneypunct_cache_cf;
189
190 typedef char fake_time_cache_c[sizeof(std::__timepunct_cache<char>)]
191 __attribute__ ((aligned(__alignof__(std::__timepunct_cache<char>))));
192 fake_time_cache_c timepunct_cache_c;
193
194 #ifdef _GLIBCXX_USE_WCHAR_T
195 typedef char fake_num_cache_w[sizeof(std::__numpunct_cache<wchar_t>)]
196 __attribute__ ((aligned(__alignof__(std::__numpunct_cache<wchar_t>))));
197 fake_num_cache_w numpunct_cache_w;
198
199 typedef char fake_money_cache_w[sizeof(std::__moneypunct_cache<wchar_t,true>)]
200 __attribute__ ((aligned(__alignof__(std::__moneypunct_cache<wchar_t,true>))));
201 fake_money_cache_w moneypunct_cache_wt;
202 fake_money_cache_w moneypunct_cache_wf;
203
204 typedef char fake_time_cache_w[sizeof(std::__timepunct_cache<wchar_t>)]
205 __attribute__ ((aligned(__alignof__(std::__timepunct_cache<wchar_t>))));
206 fake_time_cache_w timepunct_cache_w;
207 #endif
208 } // anonymous namespace
209
_GLIBCXX_BEGIN_NAMESPACE(std)210 _GLIBCXX_BEGIN_NAMESPACE(std)
211
212 locale::locale() throw() : _M_impl(0)
213 {
214 _S_initialize();
215 __gnu_cxx::__scoped_lock sentry(get_locale_mutex());
216 _S_global->_M_add_reference();
217 _M_impl = _S_global;
218 }
219
220 locale
global(const locale & __other)221 locale::global(const locale& __other)
222 {
223 _S_initialize();
224 _Impl* __old;
225 {
226 __gnu_cxx::__scoped_lock sentry(get_locale_mutex());
227 __old = _S_global;
228 __other._M_impl->_M_add_reference();
229 _S_global = __other._M_impl;
230 const string __other_name = __other.name();
231 if (__other_name != "*")
232 setlocale(LC_ALL, __other_name.c_str());
233 }
234
235 // Reference count sanity check: one reference removed for the
236 // subsition of __other locale, one added by return-by-value. Net
237 // difference: zero. When the returned locale object's destrutor
238 // is called, then the reference count is decremented and possibly
239 // destroyed.
240 return locale(__old);
241 }
242
243 const locale&
classic()244 locale::classic()
245 {
246 _S_initialize();
247 return reinterpret_cast<const locale&>(c_locale);
248 }
249
250 void
_S_initialize_once()251 locale::_S_initialize_once()
252 {
253 // 2 references.
254 // One reference for _S_classic, one for _S_global
255 _S_classic = new (&c_locale_impl) _Impl(2);
256 _S_global = _S_classic;
257 new (&c_locale) locale(_S_classic);
258 }
259
260 void
_S_initialize()261 locale::_S_initialize()
262 {
263 #ifdef __GTHREADS
264 if (__gthread_active_p())
265 __gthread_once(&_S_once, _S_initialize_once);
266 #endif
267 if (!_S_classic)
268 _S_initialize_once();
269 }
270
271 // Definitions for static const data members of locale::_Impl
272 const locale::id* const
273 locale::_Impl::_S_id_ctype[] =
274 {
275 &std::ctype<char>::id,
276 &codecvt<char, char, mbstate_t>::id,
277 #ifdef _GLIBCXX_USE_WCHAR_T
278 &std::ctype<wchar_t>::id,
279 &codecvt<wchar_t, char, mbstate_t>::id,
280 #endif
281 0
282 };
283
284 const locale::id* const
285 locale::_Impl::_S_id_numeric[] =
286 {
287 &num_get<char>::id,
288 &num_put<char>::id,
289 &numpunct<char>::id,
290 #ifdef _GLIBCXX_USE_WCHAR_T
291 &num_get<wchar_t>::id,
292 &num_put<wchar_t>::id,
293 &numpunct<wchar_t>::id,
294 #endif
295 0
296 };
297
298 const locale::id* const
299 locale::_Impl::_S_id_collate[] =
300 {
301 &std::collate<char>::id,
302 #ifdef _GLIBCXX_USE_WCHAR_T
303 &std::collate<wchar_t>::id,
304 #endif
305 0
306 };
307
308 const locale::id* const
309 locale::_Impl::_S_id_time[] =
310 {
311 &__timepunct<char>::id,
312 &time_get<char>::id,
313 &time_put<char>::id,
314 #ifdef _GLIBCXX_USE_WCHAR_T
315 &__timepunct<wchar_t>::id,
316 &time_get<wchar_t>::id,
317 &time_put<wchar_t>::id,
318 #endif
319 0
320 };
321
322 const locale::id* const
323 locale::_Impl::_S_id_monetary[] =
324 {
325 &money_get<char>::id,
326 &money_put<char>::id,
327 &moneypunct<char, false>::id,
328 &moneypunct<char, true >::id,
329 #ifdef _GLIBCXX_USE_WCHAR_T
330 &money_get<wchar_t>::id,
331 &money_put<wchar_t>::id,
332 &moneypunct<wchar_t, false>::id,
333 &moneypunct<wchar_t, true >::id,
334 #endif
335 0
336 };
337
338 const locale::id* const
339 locale::_Impl::_S_id_messages[] =
340 {
341 &std::messages<char>::id,
342 #ifdef _GLIBCXX_USE_WCHAR_T
343 &std::messages<wchar_t>::id,
344 #endif
345 0
346 };
347
348 const locale::id* const* const
349 locale::_Impl::_S_facet_categories[] =
350 {
351 // Order must match the decl order in class locale.
352 locale::_Impl::_S_id_ctype,
353 locale::_Impl::_S_id_numeric,
354 locale::_Impl::_S_id_collate,
355 locale::_Impl::_S_id_time,
356 locale::_Impl::_S_id_monetary,
357 locale::_Impl::_S_id_messages,
358 0
359 };
360
361 // Construct "C" _Impl.
362 locale::_Impl::
_Impl(size_t __refs)363 _Impl(size_t __refs) throw()
364 : _M_refcount(__refs), _M_facets(0), _M_facets_size(_GLIBCXX_NUM_FACETS),
365 _M_caches(0), _M_names(0)
366 {
367 _M_facets = new (&facet_vec) const facet*[_M_facets_size];
368 _M_caches = new (&cache_vec) const facet*[_M_facets_size];
369 for (size_t __i = 0; __i < _M_facets_size; ++__i)
370 _M_facets[__i] = _M_caches[__i] = 0;
371
372 // Name the categories.
373 _M_names = new (&name_vec) char*[_S_categories_size];
374 _M_names[0] = new (&name_c[0]) char[2];
375 std::memcpy(_M_names[0], locale::facet::_S_get_c_name(), 2);
376 for (size_t __j = 1; __j < _S_categories_size; ++__j)
377 _M_names[__j] = 0;
378
379 // This is needed as presently the C++ version of "C" locales
380 // != data in the underlying locale model for __timepunct,
381 // numpunct, and moneypunct. Also, the "C" locales must be
382 // constructed in a way such that they are pre-allocated.
383 // NB: Set locale::facets(ref) count to one so that each individual
384 // facet is not destroyed when the locale (and thus locale::_Impl) is
385 // destroyed.
386 _M_init_facet(new (&ctype_c) std::ctype<char>(0, false, 1));
387 _M_init_facet(new (&codecvt_c) codecvt<char, char, mbstate_t>(1));
388
389 typedef __numpunct_cache<char> num_cache_c;
390 num_cache_c* __npc = new (&numpunct_cache_c) num_cache_c(2);
391 _M_init_facet(new (&numpunct_c) numpunct<char>(__npc, 1));
392
393 _M_init_facet(new (&num_get_c) num_get<char>(1));
394 _M_init_facet(new (&num_put_c) num_put<char>(1));
395 _M_init_facet(new (&collate_c) std::collate<char>(1));
396
397 typedef __moneypunct_cache<char, false> money_cache_cf;
398 typedef __moneypunct_cache<char, true> money_cache_ct;
399 money_cache_cf* __mpcf = new (&moneypunct_cache_cf) money_cache_cf(2);
400 _M_init_facet(new (&moneypunct_cf) moneypunct<char, false>(__mpcf, 1));
401 money_cache_ct* __mpct = new (&moneypunct_cache_ct) money_cache_ct(2);
402 _M_init_facet(new (&moneypunct_ct) moneypunct<char, true>(__mpct, 1));
403
404 _M_init_facet(new (&money_get_c) money_get<char>(1));
405 _M_init_facet(new (&money_put_c) money_put<char>(1));
406
407 typedef __timepunct_cache<char> time_cache_c;
408 time_cache_c* __tpc = new (&timepunct_cache_c) time_cache_c(2);
409 _M_init_facet(new (&timepunct_c) __timepunct<char>(__tpc, 1));
410
411 _M_init_facet(new (&time_get_c) time_get<char>(1));
412 _M_init_facet(new (&time_put_c) time_put<char>(1));
413 _M_init_facet(new (&messages_c) std::messages<char>(1));
414
415 #ifdef _GLIBCXX_USE_WCHAR_T
416 _M_init_facet(new (&ctype_w) std::ctype<wchar_t>(1));
417 _M_init_facet(new (&codecvt_w) codecvt<wchar_t, char, mbstate_t>(1));
418
419 typedef __numpunct_cache<wchar_t> num_cache_w;
420 num_cache_w* __npw = new (&numpunct_cache_w) num_cache_w(2);
421 _M_init_facet(new (&numpunct_w) numpunct<wchar_t>(__npw, 1));
422
423 _M_init_facet(new (&num_get_w) num_get<wchar_t>(1));
424 _M_init_facet(new (&num_put_w) num_put<wchar_t>(1));
425 _M_init_facet(new (&collate_w) std::collate<wchar_t>(1));
426
427 typedef __moneypunct_cache<wchar_t, false> money_cache_wf;
428 typedef __moneypunct_cache<wchar_t, true> money_cache_wt;
429 money_cache_wf* __mpwf = new (&moneypunct_cache_wf) money_cache_wf(2);
430 _M_init_facet(new (&moneypunct_wf) moneypunct<wchar_t, false>(__mpwf, 1));
431 money_cache_wt* __mpwt = new (&moneypunct_cache_wt) money_cache_wt(2);
432 _M_init_facet(new (&moneypunct_wt) moneypunct<wchar_t, true>(__mpwt, 1));
433
434 _M_init_facet(new (&money_get_w) money_get<wchar_t>(1));
435 _M_init_facet(new (&money_put_w) money_put<wchar_t>(1));
436
437 typedef __timepunct_cache<wchar_t> time_cache_w;
438 time_cache_w* __tpw = new (&timepunct_cache_w) time_cache_w(2);
439 _M_init_facet(new (&timepunct_w) __timepunct<wchar_t>(__tpw, 1));
440
441 _M_init_facet(new (&time_get_w) time_get<wchar_t>(1));
442 _M_init_facet(new (&time_put_w) time_put<wchar_t>(1));
443 _M_init_facet(new (&messages_w) std::messages<wchar_t>(1));
444 #endif
445
446 // This locale is safe to pre-cache, after all the facets have
447 // been created and installed.
448 _M_caches[numpunct<char>::id._M_id()] = __npc;
449 _M_caches[moneypunct<char, false>::id._M_id()] = __mpcf;
450 _M_caches[moneypunct<char, true>::id._M_id()] = __mpct;
451 _M_caches[__timepunct<char>::id._M_id()] = __tpc;
452 #ifdef _GLIBCXX_USE_WCHAR_T
453 _M_caches[numpunct<wchar_t>::id._M_id()] = __npw;
454 _M_caches[moneypunct<wchar_t, false>::id._M_id()] = __mpwf;
455 _M_caches[moneypunct<wchar_t, true>::id._M_id()] = __mpwt;
456 _M_caches[__timepunct<wchar_t>::id._M_id()] = __tpw;
457 #endif
458 }
459
460 _GLIBCXX_END_NAMESPACE
461