gcc:

[official-gcc.git] / libstdc++-v3 / src / localename.cc

// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#include <clocale>
#include <cstring>
#include <locale>

namespace __gnu_cxx
{
  using namespace std;

  // Defined in globals.cc.
  extern locale::facet* facet_vec[_GLIBCPP_NUM_FACETS];
  extern char* name_vec[6 + _GLIBCPP_NUM_CATEGORIES];
  extern char name_c[6 + _GLIBCPP_NUM_CATEGORIES][2];

  extern std::ctype<char>                       ctype_c;
  extern std::collate<char>                     collate_c;
  extern numpunct<char>                         numpunct_c;
  extern num_get<char>                          num_get_c;
  extern num_put<char>                          num_put_c;
  extern codecvt<char, char, mbstate_t>         codecvt_c;
  extern moneypunct<char, false>                moneypunct_fc;
  extern moneypunct<char, true>                 moneypunct_tc;
  extern money_get<char>                        money_get_c;
  extern money_put<char>                        money_put_c;
  extern __timepunct<char>                      timepunct_c;
  extern time_get<char>                         time_get_c;
  extern time_put<char>                         time_put_c;
  extern std::messages<char>                    messages_c;
#ifdef  _GLIBCPP_USE_WCHAR_T
  extern std::ctype<wchar_t>                    ctype_w;
  extern std::collate<wchar_t>                  collate_w;
  extern numpunct<wchar_t>                      numpunct_w;
  extern num_get<wchar_t>                       num_get_w;
  extern num_put<wchar_t>                       num_put_w;
  extern codecvt<wchar_t, char, mbstate_t>      codecvt_w;
  extern moneypunct<wchar_t, false>             moneypunct_fw;
  extern moneypunct<wchar_t, true>              moneypunct_tw;
  extern money_get<wchar_t>                     money_get_w;
  extern money_put<wchar_t>                     money_put_w;
  extern __timepunct<wchar_t>                   timepunct_w;
  extern time_get<wchar_t>                      time_get_w;
  extern time_put<wchar_t>                      time_put_w;
  extern std::messages<wchar_t>                 messages_w;
#endif

  extern locale::facet* cache_vec[_GLIBCPP_NUM_FACETS];
  extern std::__numpunct_cache<char>            numpunct_cache_c;
#ifdef  _GLIBCPP_USE_WCHAR_T
  extern std::__numpunct_cache<wchar_t>         numpunct_cache_w;
#endif
} // namespace __gnu_cxx

namespace std
{
  using namespace __gnu_cxx;

  locale::_Impl::
  ~_Impl() throw()
  {
    for (size_t __i = 0; __i < _M_facets_size; ++__i)
      if (_M_facets[__i])
        _M_facets[__i]->_M_remove_reference();
    delete [] _M_facets;

    for (size_t __i = 0; __i < _M_facets_size; ++__i)
      if (_M_caches[__i])
        _M_caches[__i]->_M_remove_reference(); 
    delete [] _M_caches;

    for (size_t __i = 0; __i < _S_categories_size; ++__i)
      delete [] _M_names[__i];  
    delete [] _M_names;
  }

  // Clone existing _Impl object.
  locale::_Impl::
  _Impl(const _Impl& __imp, size_t __refs)
  : _M_references(__refs), _M_facets_size(__imp._M_facets_size)
  {
    try
      { 
        _M_facets = new const facet*[_M_facets_size]; 
        for (size_t __i = 0; __i < _M_facets_size; ++__i)
          _M_facets[__i] = 0;
      }
    catch(...) 
      {
        delete [] _M_facets;
        __throw_exception_again;
      }
    for (size_t __i = 0; __i < _M_facets_size; ++__i)
      {
        _M_facets[__i] = __imp._M_facets[__i];
        if (_M_facets[__i])
          _M_facets[__i]->_M_add_reference();
      }

    try 
      {
        _M_caches = new const facet*[_M_facets_size];
      }
    catch(...)
      {
        delete [] _M_caches;
        __throw_exception_again;
      }
    for (size_t __i = 0; __i < _M_facets_size; ++__i)
      {
        _M_caches[__i] = __imp._M_caches[__i];
        if (_M_caches[__i])
          _M_caches[__i]->_M_add_reference(); 
      }

    try 
      {
        _M_names = new char*[_S_categories_size];
      }
    catch(...)
      {
        delete [] _M_names;
        __throw_exception_again;
      }
    for (size_t __i = 0; __i < _S_categories_size; ++__i)
      {
        char* __new = new char[strlen(__imp._M_names[__i]) + 1];
        strcpy(__new, __imp._M_names[__i]);
        _M_names[__i] = __new;
      }
  }

  // Construct named _Impl.
  locale::_Impl::
  _Impl(const char* __s, size_t __refs) 
  : _M_references(__refs), _M_facets_size(_GLIBCPP_NUM_FACETS)
  {
    // Initialize the underlying locale model, which also checks to
    // see if the given name is valid.
    __c_locale __cloc;
    locale::facet::_S_create_c_locale(__cloc, __s);

    try
      { 
        _M_facets = new const facet*[_M_facets_size]; 
        for (size_t __i = 0; __i < _M_facets_size; ++__i)
          _M_facets[__i] = 0;
      }
    catch(...) 
      {
        delete [] _M_facets;
        __throw_exception_again;
      }

    try 
      {
        _M_caches = new const facet*[_M_facets_size];
        for (size_t __i = 0; __i < _M_facets_size; ++__i)
          _M_caches[__i] = 0;
      }
    catch(...)
      {
        delete [] _M_caches;
        __throw_exception_again;
      }

    // Name all the categories.
    try 
      {
        _M_names = new char*[_S_categories_size];
      }
    catch(...)
      {
        delete [] _M_names;
        __throw_exception_again;
      }
    size_t __len = strlen(__s);
    if (!strchr(__s, ';'))
      {
        for (size_t __i = 0; __i < _S_categories_size; ++__i)
          {
            _M_names[__i] = new char[__len + 1];
            strcpy(_M_names[__i], __s);
          }
      }
    else
      {
        const char* __beg = __s;
        for (size_t __i = 0; __i < _S_categories_size; ++__i)
          {
            __beg = strchr(__beg, '=') + 1;
            const char* __end = strchr(__beg, ';');
            if (!__end)
              __end = __s + __len;
            char* __new = new char[__end - __beg + 1];
            memcpy(__new, __beg, __end - __beg);
            __new[__end - __beg] = '\0';
            _M_names[__i] = __new;
          }
      }

    // Construct all standard facets and add them to _M_facets.  
    _M_init_facet(new std::ctype<char>(__cloc, 0, false));
    _M_init_facet(new codecvt<char, char, mbstate_t>(__cloc));
    _M_init_facet(new numpunct<char>(__cloc));
    _M_init_facet(new num_get<char>);
    _M_init_facet(new num_put<char>);
    _M_init_facet(new std::collate<char>(__cloc));
    _M_init_facet(new moneypunct<char, false>(__cloc, __s));
    _M_init_facet(new moneypunct<char, true>(__cloc, __s));
    _M_init_facet(new money_get<char>);
    _M_init_facet(new money_put<char>);
    _M_init_facet(new __timepunct<char>(__cloc, __s));
    _M_init_facet(new time_get<char>);
    _M_init_facet(new time_put<char>);
    _M_init_facet(new std::messages<char>(__cloc, __s));
        
#ifdef  _GLIBCPP_USE_WCHAR_T
    _M_init_facet(new std::ctype<wchar_t>(__cloc));
    _M_init_facet(new codecvt<wchar_t, char, mbstate_t>(__cloc));
    _M_init_facet(new numpunct<wchar_t>(__cloc));
    _M_init_facet(new num_get<wchar_t>);
    _M_init_facet(new num_put<wchar_t>);
    _M_init_facet(new std::collate<wchar_t>(__cloc));
    _M_init_facet(new moneypunct<wchar_t, false>(__cloc, __s));
    _M_init_facet(new moneypunct<wchar_t, true>(__cloc, __s));
    _M_init_facet(new money_get<wchar_t>);
    _M_init_facet(new money_put<wchar_t>);
    _M_init_facet(new __timepunct<wchar_t>(__cloc, __s));
    _M_init_facet(new time_get<wchar_t>);
    _M_init_facet(new time_put<wchar_t>);
    _M_init_facet(new std::messages<wchar_t>(__cloc, __s));
#endif    
    locale::facet::_S_destroy_c_locale(__cloc);
  }

  // Construct "C" _Impl.
  locale::_Impl::
  _Impl(facet**, size_t __refs, bool) 
  : _M_references(__refs), _M_facets_size(_GLIBCPP_NUM_FACETS)
  {
    // Initialize the underlying locale model.
    locale::facet::_S_c_name[0] = 'C';
    locale::facet::_S_c_name[1] = '\0';
    locale::facet::_S_create_c_locale(locale::facet::_S_c_locale, 
                                      locale::facet::_S_c_name);

    _M_facets = new (&facet_vec) const facet*[_M_facets_size];
    for (size_t __i = 0; __i < _M_facets_size; ++__i)
      _M_facets[__i] = 0;

    _M_caches = new (&cache_vec) const facet*[_M_facets_size];
    for (size_t __i = 0; __i < _M_facets_size; ++__i)
      _M_caches[__i] = 0;

    // Name all the categories.
    _M_names = new (&name_vec) char*[_S_categories_size];
    for (size_t __i = 0; __i < _S_categories_size; ++__i)
      {
        _M_names[__i] = new (&name_c[__i]) char[2];
        strcpy(_M_names[__i], locale::facet::_S_c_name);
      }

    // This is needed as presently the C++ version of "C" locales
    // != data in the underlying locale model for __timepunct,
    // numpunct, and moneypunct. Also, the "C" locales must be
    // constructed in a way such that they are pre-allocated.
    // NB: Set locale::facets(ref) count to one so that each individual
    // facet is not destroyed when the locale (and thus locale::_Impl) is
    // destroyed.
    _M_init_facet(new (&ctype_c) std::ctype<char>(0, false, 1));
    _M_init_facet(new (&codecvt_c) codecvt<char, char, mbstate_t>(1));

    // Safe to cache this.
    typedef __numpunct_cache<char> num_cache_c;
    num_cache_c* __npc = new (&numpunct_cache_c) num_cache_c(2);
    _M_init_facet(new (&numpunct_c) numpunct<char>(__npc, 1));

    _M_init_facet(new (&num_get_c) num_get<char>(1));
    _M_init_facet(new (&num_put_c) num_put<char>(1));
    _M_init_facet(new (&collate_c) std::collate<char>(1));
    _M_init_facet(new (&moneypunct_fc) moneypunct<char, false>(1));
    _M_init_facet(new (&moneypunct_tc) moneypunct<char, true>(1));
    _M_init_facet(new (&money_get_c) money_get<char>(1));
    _M_init_facet(new (&money_put_c) money_put<char>(1));
    _M_init_facet(new (&timepunct_c) __timepunct<char>(1));
    _M_init_facet(new (&time_get_c) time_get<char>(1));
    _M_init_facet(new (&time_put_c) time_put<char>(1));
    _M_init_facet(new (&messages_c) std::messages<char>(1));    

#ifdef  _GLIBCPP_USE_WCHAR_T
    _M_init_facet(new (&ctype_w) std::ctype<wchar_t>(1));
    _M_init_facet(new (&codecvt_w) codecvt<wchar_t, char, mbstate_t>(1));

    typedef __numpunct_cache<wchar_t> num_cache_w;
    num_cache_w* __npw = new (&numpunct_cache_w) num_cache_w(2);
    _M_init_facet(new (&numpunct_w) numpunct<wchar_t>(__npw, 1));

    _M_init_facet(new (&num_get_w) num_get<wchar_t>(1));
    _M_init_facet(new (&num_put_w) num_put<wchar_t>(1));
    _M_init_facet(new (&collate_w) std::collate<wchar_t>(1));
    _M_init_facet(new (&moneypunct_fw) moneypunct<wchar_t, false>(1));
    _M_init_facet(new (&moneypunct_tw) moneypunct<wchar_t, true>(1));
    _M_init_facet(new (&money_get_w) money_get<wchar_t>(1));
    _M_init_facet(new (&money_put_w) money_put<wchar_t>(1));
    _M_init_facet(new (&timepunct_w) __timepunct<wchar_t>(1));
    _M_init_facet(new (&time_get_w) time_get<wchar_t>(1));
    _M_init_facet(new (&time_put_w) time_put<wchar_t>(1));
    _M_init_facet(new (&messages_w) std::messages<wchar_t>(1));
#endif 

    // This locale is safe to pre-cache, after all the facets have
    // been installed.
    _M_caches[numpunct<char>::id._M_id()] = __npc;
#ifdef  _GLIBCPP_USE_WCHAR_T
    _M_caches[numpunct<wchar_t>::id._M_id()] = __npw;
#endif
  }
  
  void
  locale::_Impl::
  _M_replace_categories(const _Impl* __imp, category __cat)
  {
    category __mask;
    for (size_t __ix = 0; __ix < _S_categories_size; ++__ix)
      {
        __mask = 1 << __ix;
        if (__mask & __cat)
          {
            // Need to replace entry in _M_facets with other locale's info.
            _M_replace_category(__imp, _S_facet_categories[__ix]);
            // If both have names, go ahead and mangle.
            if (strcmp(_M_names[__ix], "*") != 0 
                && strcmp(__imp->_M_names[__ix], "*") != 0)
              {
                delete [] _M_names[__ix];
                char* __new = new char[strlen(__imp->_M_names[__ix]) + 1];
                strcpy(__new, __imp->_M_names[__ix]);
                _M_names[__ix] = __new;
              }
          }
      }
  }

  void
  locale::_Impl::
  _M_replace_category(const _Impl* __imp, const locale::id* const* __idpp)
  {
    for (; *__idpp; ++__idpp)
      _M_replace_facet(__imp, *__idpp);
  }
  
  void
  locale::_Impl::
  _M_replace_facet(const _Impl* __imp, const locale::id* __idp)
  {
    size_t __index = __idp->_M_id();
    if ((__index > (__imp->_M_facets_size - 1)) || !__imp->_M_facets[__index])
      __throw_runtime_error("locale::_Impl::_M_replace_facet");
    _M_install_facet(__idp, __imp->_M_facets[__index]); 
  }

  void
  locale::_Impl::
  _M_install_facet(const locale::id* __idp, const facet* __fp)
  {
    if (__fp)
      {
        size_t __index = __idp->_M_id();

        // Check size of facet vector to ensure adequate room.
        if (__index > _M_facets_size - 1)
          {
            const size_t __new_size = __index + 4;

            // New facet array.
            const facet** __oldf = _M_facets;
            const facet** __newf;
            __newf = new const facet*[__new_size]; 
            for (size_t __i = 0; __i < _M_facets_size; ++__i)
              __newf[__i] = _M_facets[__i];
            for (size_t __i2 = _M_facets_size; __i2 < __new_size; ++__i2)
              __newf[__i2] = 0;

            // New cache array.
            const facet** __oldc = _M_caches;
            const facet** __newc;
            __newc = new const facet*[__new_size]; 
            for (size_t __i = 0; __i < _M_facets_size; ++__i)
              __newc[__i] = _M_caches[__i];
            for (size_t __i2 = _M_facets_size; __i2 < __new_size; ++__i2)
              __newc[__i2] = 0;

            _M_facets_size = __new_size;
            _M_facets = __newf;
            _M_caches = __newc;
            delete [] __oldf;
            delete [] __oldc;
          }

        __fp->_M_add_reference();
        const facet*& __fpr = _M_facets[__index];
        if (__fpr)
          {
            // Replacing an existing facet. Order matters.
            __fpr->_M_remove_reference();
            __fpr = __fp;
          }
        else
          {
            // Installing a newly created facet into an empty
            // _M_facets container, say a newly-constructed,
            // swanky-fresh _Impl.
            _M_facets[__index] = __fp;
          }

        // Ideally, it would be nice to only remove the caches that
        // are now incorrect. However, some of the caches depend on
        // multiple facets, and we only know about one facet
        // here. It's no great loss: the first use of the new facet
        // will create a new, correctly cached facet anyway.
        for (size_t __i = 0; __i < _M_facets_size; ++__i)
          {
            const facet* __cpr = _M_caches[__i];
            if (__cpr)
              {
                __cpr->_M_remove_reference();
                _M_caches[__i] = 0;
              }
          }
      }
  }
} // namespace std