libstdc++-v3/src/locale_init.cc

   1 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
   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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  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 <bits/atomicity.h>
  36 #include <bits/concurrence.h>
  37
  38 namespace __gnu_cxx
  39 {
  40   // Defined in globals.cc.
  41   extern std::locale            c_locale;
  42   extern std::locale::_Impl     c_locale_impl;
  43
  44   extern std::locale::facet* facet_vec[_GLIBCXX_NUM_FACETS];
  45   extern char* name_vec[6 + _GLIBCXX_NUM_CATEGORIES];
  46   extern char name_c[6 + _GLIBCXX_NUM_CATEGORIES][2];
  47
  48   extern std::ctype<char>                       ctype_c;
  49   extern std::collate<char>                     collate_c;
  50   extern std::numpunct<char>                    numpunct_c;
  51   extern std::num_get<char>                     num_get_c;
  52   extern std::num_put<char>                     num_put_c;
  53   extern std::codecvt<char, char, mbstate_t>    codecvt_c;
  54   extern std::moneypunct<char, false>           moneypunct_cf;
  55   extern std::moneypunct<char, true>            moneypunct_ct;
  56   extern std::money_get<char>                   money_get_c;
  57   extern std::money_put<char>                   money_put_c;
  58   extern std::__timepunct<char>                 timepunct_c;
  59   extern std::time_get<char>                    time_get_c;
  60   extern std::time_put<char>                    time_put_c;
  61   extern std::messages<char>                    messages_c;
  62 #ifdef  _GLIBCXX_USE_WCHAR_T
  63   extern std::ctype<wchar_t>                    ctype_w;
  64   extern std::collate<wchar_t>                  collate_w;
  65   extern std::numpunct<wchar_t>                 numpunct_w;
  66   extern std::num_get<wchar_t>                  num_get_w;
  67   extern std::num_put<wchar_t>                  num_put_w;
  68   extern std::codecvt<wchar_t, char, mbstate_t> codecvt_w;
  69   extern std::moneypunct<wchar_t, false>        moneypunct_wf;
  70   extern std::moneypunct<wchar_t, true>         moneypunct_wt;
  71   extern std::money_get<wchar_t>                money_get_w;
  72   extern std::money_put<wchar_t>                money_put_w;
  73   extern std::__timepunct<wchar_t>              timepunct_w;
  74   extern std::time_get<wchar_t>                 time_get_w;
  75   extern std::time_put<wchar_t>                 time_put_w;
  76   extern std::messages<wchar_t>                 messages_w;
  77 #endif
  78
  79   // And the caches....
  80   extern std::locale::facet* cache_vec[_GLIBCXX_NUM_FACETS];
  81   extern std::__numpunct_cache<char>            numpunct_cache_c;
  82   extern std::__moneypunct_cache<char>          moneypunct_cache_cf;
  83   extern std::__moneypunct_cache<char>          moneypunct_cache_ct;
  84   extern std::__timepunct_cache<char>           timepunct_cache_c;
  85 #ifdef  _GLIBCXX_USE_WCHAR_T
  86   extern std::__numpunct_cache<wchar_t>         numpunct_cache_w;
  87   extern std::__moneypunct_cache<wchar_t>       moneypunct_cache_wf;
  88   extern std::__moneypunct_cache<wchar_t>       moneypunct_cache_wt;
  89   extern std::__timepunct_cache<wchar_t>        timepunct_cache_w;
  90 #endif
  91 } // namespace __gnu_cxx
  92
  93 namespace std
  94 {
  95   using namespace __gnu_cxx;
  96
  97   locale::locale() throw()
  98   {
  99     _S_initialize();
 100     __glibcxx_mutex_define_initialized(lock);
 101     __glibcxx_mutex_lock(lock);
 102     _S_global->_M_add_reference();
 103     _M_impl = _S_global;
 104     __glibcxx_mutex_unlock(lock);
 105   }
 106
 107   locale
 108   locale::global(const locale& __other)
 109   {
 110     _S_initialize();
 111     __glibcxx_mutex_define_initialized(lock);
 112     __glibcxx_mutex_lock(lock);
 113     _Impl* __old = _S_global;
 114     __other._M_impl->_M_add_reference();
 115     _S_global = __other._M_impl;
 116     if (_S_global->_M_check_same_name()
 117         && (std::strcmp(_S_global->_M_names[0], "*") != 0))
 118       setlocale(LC_ALL, __other.name().c_str());
 119     __glibcxx_mutex_unlock(lock);
 120
 121     // Reference count sanity check: one reference removed for the
 122     // subsition of __other locale, one added by return-by-value. Net
 123     // difference: zero. When the returned locale object's destrutor
 124     // is called, then the reference count is decremented and possibly
 125     // destroyed.
 126     return locale(__old);
 127   }
 128
 129   const locale&
 130   locale::classic()
 131   {
 132     _S_initialize();
 133     return c_locale;
 134   }
 135
 136   void
 137   locale::_S_initialize_once()
 138   {
 139     // 2 references.
 140     // One reference for _S_classic, one for _S_global
 141     _S_classic = new (&c_locale_impl) _Impl(2);
 142     _S_global = _S_classic;
 143     new (&c_locale) locale(_S_classic);
 144   }
 145
 146   void
 147   locale::_S_initialize()
 148   {
 149 #ifdef __GTHREADS
 150     if (__gthread_active_p())
 151       __gthread_once(&_S_once, _S_initialize_once);
 152 #endif
 153     if (!_S_classic)
 154       _S_initialize_once();
 155   }
 156
 157   // Definitions for static const data members of locale::_Impl
 158   const locale::id* const
 159   locale::_Impl::_S_id_ctype[] =
 160   {
 161     &std::ctype<char>::id,
 162     &codecvt<char, char, mbstate_t>::id,
 163 #ifdef _GLIBCXX_USE_WCHAR_T
 164     &std::ctype<wchar_t>::id,
 165     &codecvt<wchar_t, char, mbstate_t>::id,
 166 #endif
 167     0
 168   };
 169
 170   const locale::id* const
 171   locale::_Impl::_S_id_numeric[] =
 172   {
 173     &num_get<char>::id,
 174     &num_put<char>::id,
 175     &numpunct<char>::id,
 176 #ifdef _GLIBCXX_USE_WCHAR_T
 177     &num_get<wchar_t>::id,
 178     &num_put<wchar_t>::id,
 179     &numpunct<wchar_t>::id,
 180 #endif
 181     0
 182   };
 183
 184   const locale::id* const
 185   locale::_Impl::_S_id_collate[] =
 186   {
 187     &std::collate<char>::id,
 188 #ifdef _GLIBCXX_USE_WCHAR_T
 189     &std::collate<wchar_t>::id,
 190 #endif
 191     0
 192   };
 193
 194   const locale::id* const
 195   locale::_Impl::_S_id_time[] =
 196   {
 197     &__timepunct<char>::id,
 198     &time_get<char>::id,
 199     &time_put<char>::id,
 200 #ifdef _GLIBCXX_USE_WCHAR_T
 201     &__timepunct<wchar_t>::id,
 202     &time_get<wchar_t>::id,
 203     &time_put<wchar_t>::id,
 204 #endif
 205     0
 206   };
 207
 208   const locale::id* const
 209   locale::_Impl::_S_id_monetary[] =
 210   {
 211     &money_get<char>::id,
 212     &money_put<char>::id,
 213     &moneypunct<char, false>::id,
 214     &moneypunct<char, true >::id,
 215 #ifdef _GLIBCXX_USE_WCHAR_T
 216     &money_get<wchar_t>::id,
 217     &money_put<wchar_t>::id,
 218     &moneypunct<wchar_t, false>::id,
 219     &moneypunct<wchar_t, true >::id,
 220 #endif
 221     0
 222   };
 223
 224   const locale::id* const
 225   locale::_Impl::_S_id_messages[] =
 226   {
 227     &std::messages<char>::id,
 228 #ifdef _GLIBCXX_USE_WCHAR_T
 229     &std::messages<wchar_t>::id,
 230 #endif
 231     0
 232   };
 233
 234   const locale::id* const* const
 235   locale::_Impl::_S_facet_categories[] =
 236   {
 237     // Order must match the decl order in class locale.
 238     locale::_Impl::_S_id_ctype,
 239     locale::_Impl::_S_id_numeric,
 240     locale::_Impl::_S_id_collate,
 241     locale::_Impl::_S_id_time,
 242     locale::_Impl::_S_id_monetary,
 243     locale::_Impl::_S_id_messages,
 244     0
 245   };
 246
 247   // Construct "C" _Impl.
 248   locale::_Impl::
 249   _Impl(size_t __refs) throw()
 250   : _M_refcount(__refs), _M_facets_size(_GLIBCXX_NUM_FACETS)
 251   {
 252     _M_facets = new (&facet_vec) const facet*[_M_facets_size];
 253     _M_caches = new (&cache_vec) const facet*[_M_facets_size];
 254     for (size_t __i = 0; __i < _M_facets_size; ++__i)
 255       _M_facets[__i] = _M_caches[__i] = 0;
 256
 257     // Name all the categories.
 258     _M_names = new (&name_vec) char*[_S_categories_size];
 259     for (size_t __i = 0; __i < _S_categories_size; ++__i)
 260       {
 261         _M_names[__i] = new (&name_c[__i]) char[2];
 262         std::strcpy(_M_names[__i], locale::facet::_S_get_c_name());
 263       }
 264
 265     // This is needed as presently the C++ version of "C" locales
 266     // != data in the underlying locale model for __timepunct,
 267     // numpunct, and moneypunct. Also, the "C" locales must be
 268     // constructed in a way such that they are pre-allocated.
 269     // NB: Set locale::facets(ref) count to one so that each individual
 270     // facet is not destroyed when the locale (and thus locale::_Impl) is
 271     // destroyed.
 272     _M_init_facet(new (&ctype_c) std::ctype<char>(0, false, 1));
 273     _M_init_facet(new (&codecvt_c) codecvt<char, char, mbstate_t>(1));
 274
 275     typedef __numpunct_cache<char> num_cache_c;
 276     num_cache_c* __npc = new (&numpunct_cache_c) num_cache_c(2);
 277     _M_init_facet(new (&numpunct_c) numpunct<char>(__npc, 1));
 278
 279     _M_init_facet(new (&num_get_c) num_get<char>(1));
 280     _M_init_facet(new (&num_put_c) num_put<char>(1));
 281     _M_init_facet(new (&collate_c) std::collate<char>(1));
 282
 283     typedef __moneypunct_cache<char> money_cache_c;
 284     money_cache_c* __mpcf = new (&moneypunct_cache_cf) money_cache_c(2);
 285     _M_init_facet(new (&moneypunct_cf) moneypunct<char, false>(__mpcf, 1));
 286     money_cache_c* __mpct = new (&moneypunct_cache_ct) money_cache_c(2);
 287     _M_init_facet(new (&moneypunct_ct) moneypunct<char, true>(__mpct, 1));
 288
 289     _M_init_facet(new (&money_get_c) money_get<char>(1));
 290     _M_init_facet(new (&money_put_c) money_put<char>(1));
 291
 292     typedef __timepunct_cache<char> time_cache_c;
 293     time_cache_c* __tpc = new (&timepunct_cache_c) time_cache_c(2);
 294     _M_init_facet(new (&timepunct_c) __timepunct<char>(__tpc, 1));
 295
 296     _M_init_facet(new (&time_get_c) time_get<char>(1));
 297     _M_init_facet(new (&time_put_c) time_put<char>(1));
 298     _M_init_facet(new (&messages_c) std::messages<char>(1));
 299
 300 #ifdef  _GLIBCXX_USE_WCHAR_T
 301     _M_init_facet(new (&ctype_w) std::ctype<wchar_t>(1));
 302     _M_init_facet(new (&codecvt_w) codecvt<wchar_t, char, mbstate_t>(1));
 303
 304     typedef __numpunct_cache<wchar_t> num_cache_w;
 305     num_cache_w* __npw = new (&numpunct_cache_w) num_cache_w(2);
 306     _M_init_facet(new (&numpunct_w) numpunct<wchar_t>(__npw, 1));
 307
 308     _M_init_facet(new (&num_get_w) num_get<wchar_t>(1));
 309     _M_init_facet(new (&num_put_w) num_put<wchar_t>(1));
 310     _M_init_facet(new (&collate_w) std::collate<wchar_t>(1));
 311
 312     typedef __moneypunct_cache<wchar_t> money_cache_w;
 313     money_cache_w* __mpwf = new (&moneypunct_cache_wf) money_cache_w(2);
 314     _M_init_facet(new (&moneypunct_wf) moneypunct<wchar_t, false>(__mpwf, 1));
 315     money_cache_w* __mpwt = new (&moneypunct_cache_wt) money_cache_w(2);
 316     _M_init_facet(new (&moneypunct_wt) moneypunct<wchar_t, true>(__mpwt, 1));
 317
 318     _M_init_facet(new (&money_get_w) money_get<wchar_t>(1));
 319     _M_init_facet(new (&money_put_w) money_put<wchar_t>(1));
 320
 321     typedef __timepunct_cache<wchar_t> time_cache_w;
 322     time_cache_w* __tpw = new (&timepunct_cache_w) time_cache_w(2);
 323     _M_init_facet(new (&timepunct_w) __timepunct<wchar_t>(__tpw, 1));
 324
 325     _M_init_facet(new (&time_get_w) time_get<wchar_t>(1));
 326     _M_init_facet(new (&time_put_w) time_put<wchar_t>(1));
 327     _M_init_facet(new (&messages_w) std::messages<wchar_t>(1));
 328 #endif
 329
 330     // This locale is safe to pre-cache, after all the facets have
 331     // been created and installed.
 332     _M_caches[numpunct<char>::id._M_id()] = __npc;
 333     _M_caches[moneypunct<char, false>::id._M_id()] = __mpcf;
 334     _M_caches[moneypunct<char, true>::id._M_id()] = __mpct;
 335     _M_caches[__timepunct<char>::id._M_id()] = __tpc;
 336 #ifdef  _GLIBCXX_USE_WCHAR_T
 337     _M_caches[numpunct<wchar_t>::id._M_id()] = __npw;
 338     _M_caches[moneypunct<wchar_t, false>::id._M_id()] = __mpwf;
 339     _M_caches[moneypunct<wchar_t, true>::id._M_id()] = __mpwt;
 340     _M_caches[__timepunct<wchar_t>::id._M_id()] = __tpw;
 341 #endif
 342   }
 343 } // namespace std