libstdc++-v3/src/localename.cc

   1 // Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // As a special exception, you may use this file as part of a free software
  20 // library without restriction.  Specifically, if other files instantiate
  21 // templates or use macros or inline functions from this file, or you compile
  22 // this file and link it with other files to produce an executable, this
  23 // file does not by itself cause the resulting executable to be covered by
  24 // the GNU General Public License.  This exception does not however
  25 // invalidate any other reasons why the executable file might be covered by
  26 // the GNU General Public License.
  27
  28 #include <clocale>
  29 #include <cstring>
  30 #include <locale>
  31 #include <vector>
  32 #include <stdexcept>
  33
  34 namespace std
  35 {
  36   locale::_Impl::
  37   ~_Impl() throw()
  38   {
  39     __vec_facet::iterator it = _M_facets->begin();
  40     for (; it != _M_facets->end(); ++it)
  41       if (*it)
  42         (*it)->_M_remove_reference();
  43     delete _M_facets;
  44   }
  45
  46   // Clone existing _Impl object.
  47   locale::_Impl::
  48   _Impl(const _Impl& __imp, size_t __refs)
  49   : _M_references(__refs), _M_facets(0) // XXX
  50   {
  51     try
  52       {  _M_facets = new __vec_facet(*(__imp._M_facets)); }
  53     catch(...)
  54       {
  55         delete _M_facets;
  56         __throw_exception_again;
  57       }
  58
  59     for (size_t i = 0; i < _S_num_categories; ++i)
  60       _M_names[i] = __imp._M_names[i];
  61
  62     __vec_facet::iterator __it = _M_facets->begin();
  63     for (; __it != _M_facets->end(); ++__it)
  64       if (*__it)
  65         (*__it)->_M_add_reference();
  66   }
  67
  68   // Construct named _Impl, including the standard "C" locale.
  69   locale::_Impl::
  70   _Impl(string __str, size_t __refs)
  71   : _M_references(__refs), _M_facets(0)
  72   {
  73     // Initialize the underlying locale model, which also checks to
  74     // see if the given name is valid.
  75     __c_locale __cloc;
  76     locale::facet::_S_create_c_locale(__cloc, __str.c_str());
  77
  78     // This is needed as presently "C" locales != required data in
  79     // __timepunct, numpunct, and moneypunct.
  80     __c_locale __cloc_c = NULL;
  81     if (__str != "C" && __str != "POSIX")
  82       __cloc_c = __cloc;
  83
  84     // Allocate facet container.
  85     try
  86       {  _M_facets = new __vec_facet(_S_num_facets, NULL); }
  87     catch(...)
  88       {
  89         delete _M_facets;
  90         __throw_exception_again;
  91       }
  92
  93     // Name all the categories.
  94     for (size_t i = 0; i < _S_num_categories; ++i)
  95       _M_names[i] = __str;
  96
  97     // Construct all standard facets and add them to _M_facets.
  98     _M_init_facet(new std::collate<char>(__cloc));
  99     _M_init_facet(new std::ctype<char>(__cloc));
 100     _M_init_facet(new codecvt<char, char, mbstate_t>);
 101     _M_init_facet(new moneypunct<char, false>(__cloc_c));
 102     _M_init_facet(new moneypunct<char, true>(__cloc_c));
 103     _M_init_facet(new money_get<char>);
 104     _M_init_facet(new money_put<char>);
 105     _M_init_facet(new numpunct<char>(__cloc_c));
 106     _M_init_facet(new num_get<char>);
 107     _M_init_facet(new num_put<char>);
 108     _M_init_facet(new __timepunct<char>(__cloc_c, __str.c_str()));
 109     _M_init_facet(new time_get<char>);
 110     _M_init_facet(new time_put<char>);
 111     _M_init_facet(new std::messages<char>(__cloc, __str.c_str()));
 112
 113 #ifdef  _GLIBCPP_USE_WCHAR_T
 114     _M_init_facet(new std::collate<wchar_t>(__cloc));
 115     _M_init_facet(new std::ctype<wchar_t>(__cloc));
 116     _M_init_facet(new codecvt<wchar_t, char, mbstate_t>);
 117     _M_init_facet(new moneypunct<wchar_t, false>(__cloc_c));
 118     _M_init_facet(new moneypunct<wchar_t, true>(__cloc_c));
 119     _M_init_facet(new money_get<wchar_t>);
 120     _M_init_facet(new money_put<wchar_t>);
 121     _M_init_facet(new numpunct<wchar_t>(__cloc_c));
 122     _M_init_facet(new num_get<wchar_t>);
 123     _M_init_facet(new num_put<wchar_t>);
 124     _M_init_facet(new __timepunct<wchar_t>(__cloc_c, __str.c_str()));
 125     _M_init_facet(new time_get<wchar_t>);
 126     _M_init_facet(new time_put<wchar_t>);
 127     _M_init_facet(new std::messages<wchar_t>(__cloc, __str.c_str()));
 128 #endif
 129     locale::facet::_S_destroy_c_locale(__cloc);
 130   }
 131
 132   void
 133   locale::_Impl::
 134   _M_replace_categories(const _Impl* __imp, category __cat)
 135   {
 136     const string __none("*");
 137     category __mask;
 138     for (unsigned int __ix = 0; __ix < _S_num_categories; ++__ix)
 139       {
 140         __mask = 1 << __ix;
 141         if (__mask & __cat)
 142           {
 143             // Need to replace entry in _M_facets with other locale's info.
 144             _M_replace_category(__imp, _S_facet_categories[__ix]);
 145             // If both have names, go ahead and mangle.
 146             if (_M_names[__ix] != __none && __imp->_M_names[__ix] != __none)
 147               _M_names[__ix] = __imp->_M_names[__ix];
 148           }
 149       }
 150   }
 151
 152   void
 153   locale::_Impl::
 154   _M_replace_category(const _Impl* __imp, const locale::id* const* __idpp)
 155   {
 156     for (; *__idpp; ++__idpp)
 157       _M_replace_facet(__imp, *__idpp);
 158   }
 159
 160   void
 161   locale::_Impl::
 162   _M_replace_facet(const _Impl* __imp, const locale::id* __idp)
 163   {
 164     size_t __index = __idp->_M_index;
 165     if (__index == 0
 166         || __imp->_M_facets->size() <= __index
 167         || (*(__imp->_M_facets))[__index] == 0)
 168       __throw_runtime_error("no locale facet");
 169
 170     _M_install_facet(__idp, (*(__imp->_M_facets))[__index]);
 171   }
 172
 173   void
 174   locale::_Impl::
 175   _M_install_facet(const locale::id* __idp, facet* __fp)
 176   {
 177     if (__fp)
 178       {
 179         size_t& __index = __idp->_M_index;
 180         if (!__index)
 181           __index = ++locale::id::_S_highwater;  // XXX MT
 182
 183         if (__index >= _M_facets->size())
 184           _M_facets->resize(__index + 1, 0);  // might throw
 185
 186         facet*& __fpr = (*_M_facets)[__index];
 187         if (__fpr)
 188           {
 189             // Replacing an existing facet.
 190             // Order matters, here:
 191             __fp->_M_add_reference();
 192             __fpr->_M_remove_reference();
 193             __fpr = __fp;
 194           }
 195         else
 196           {
 197             // Installing a newly created facet into an empty
 198             // _M_facets container, say a newly-constructed,
 199             // swanky-fresh _Impl.
 200             (*_M_facets)[__index] = __fp;
 201           }
 202       }
 203   }
 204 } // namespace std