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 locale::facet* facet_cache_vec[2 * _GLIBCPP_NUM_FACETS];
  extern char* facet_name[6 + _GLIBCPP_NUM_CATEGORIES];

  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 std::__locale_cache<numpunct<char> >   locale_cache_np_c;
#ifdef  _GLIBCPP_USE_WCHAR_T
  extern std::__locale_cache<numpunct<wchar_t> >    locale_cache_np_w;
#endif
} // namespace __gnu_cxx

namespace std
{
  using namespace __gnu_cxx;

  locale::_Impl::
  ~_Impl() throw()
  {
    // Clean up facets, then caches.  No cache refcounts for now.
    if (_M_facets)
      {
    for (size_t __i = 0; __i < _M_facets_size; ++__i)
      if (_M_facets[__i])
        _M_facets[__i]->_M_remove_reference();

    for (size_t __i = _M_facets_size; __i < 2*_M_facets_size; ++__i)
      if (_M_facets[__i])
        delete (__locale_cache_base*)_M_facets[__i];
      }
    delete [] _M_facets;

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

  // Clone existing _Impl object.
  locale::_Impl::
  _Impl(const _Impl& __imp, size_t __refs)
  : _M_references(__refs), _M_facets_size(__imp._M_facets_size) // XXX
  {
    _M_facets = 0;
    for (size_t __i = 0; __i < _S_categories_size
                     + _S_extra_categories_size; ++__i)
      _M_names[__i] = 0;
    try
      { 
    // Space for facets and matching caches
    _M_facets = new facet*[2*_M_facets_size]; 
    for (size_t __i = 0; __i < 2*_M_facets_size; ++__i)
      _M_facets[__i] = 0;
    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();
      }
    for (size_t __i = 0; 
         __i < _S_categories_size + _S_extra_categories_size; ++__i)
      {
        char* __new = new char[strlen(__imp._M_names[__i]) + 1];
        strcpy(__new, __imp._M_names[__i]);
        _M_names[__i] = __new;
      }
      }
    catch(...)
      {
    this->~_Impl();
    __throw_exception_again;    
      }
  }

  // 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);

    _M_facets = 0;
    for (size_t __i = 0; __i < _S_categories_size
                     + _S_extra_categories_size; ++__i)
      _M_names[__i] = 0;    
    try
      {
    // Space for facets and matching caches
    _M_facets = new facet*[2*_M_facets_size]; 
    for (size_t __i = 0; __i < 2*_M_facets_size; ++__i)
      _M_facets[__i] = 0;

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

    // 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>);
    _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>);
    _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);
      }
    catch(...)
      {
    locale::facet::_S_destroy_c_locale(__cloc);
    this->~_Impl();
    __throw_exception_again;
      }    
  }

  // 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);

    // Space for facets and matching caches
    _M_facets = new(&facet_cache_vec) facet*[2*_M_facets_size];
    for (size_t __i = 0; __i < 2*_M_facets_size; ++__i)
      _M_facets[__i] = 0;

    // Name all the categories.
    for (size_t __i = 0; 
     __i < _S_categories_size + _S_extra_categories_size; ++__i)
      {
    _M_names[__i]  = new (&facet_name[__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));
    _M_init_facet(new (&numpunct_c) numpunct<char>(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));
    _M_init_facet(new (&numpunct_w) numpunct<wchar_t>(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 

    // Initialize the static locale caches for C locale.

    locale ltmp(this);      // Doesn't bump refcount
    _M_add_reference();     // Bump so destructor doesn't trash us

    // These need to be built in static allocated memory.  There must
    // be a better way to do this!
    __locale_cache<numpunct<char> >* __lc =
      new (&locale_cache_np_c) __locale_cache<numpunct<char> >(ltmp, true);
    _M_facets[numpunct<char>::id._M_id() + _M_facets_size] =
      reinterpret_cast<locale::facet*>(__lc);
      
#ifdef  _GLIBCPP_USE_WCHAR_T
    __locale_cache<numpunct<wchar_t> >* __wlc =
      new (&locale_cache_np_w) __locale_cache<numpunct<wchar_t> >(ltmp, true);
    _M_facets[numpunct<wchar_t>::id._M_id() + _M_facets_size] =
      reinterpret_cast<locale::facet*>(__wlc);
#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)
          {
        char* __new = new char[strlen(__imp->_M_names[__ix]) + 1];
        strcpy(__new, __imp->_M_names[__ix]);
        delete [] _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("no locale facet");
    _M_install_facet(__idp, __imp->_M_facets[__index]); 
  }

  void
  locale::_Impl::
  _M_install_facet(const locale::id* __idp, 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)
      {
        facet** __old = _M_facets;
        facet** __new;
        const size_t __new_size = __index + 4;
        __new = new facet*[2 * __new_size]; 
        for (size_t __i = 0; __i < _M_facets_size; ++__i)
          __new[__i] = _M_facets[__i];
        for (size_t __i2 = _M_facets_size; __i2 < __new_size; ++__i2)
          __new[__i2] = 0;
        // Also copy caches and clear extra space
        for (size_t __i = 0; __i < _M_facets_size; ++__i)
          __new[__i + __new_size] = _M_facets[__i + _M_facets_size];
        for (size_t __i2 = _M_facets_size; __i2 < __new_size; ++__i2)
          __new[__i2 + __new_size] = 0;

        _M_facets_size = __new_size;
        _M_facets = __new;
        delete [] __old;
      }

    __fp->_M_add_reference();
    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;
      }
      }
  }
} // namespace std

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