numeric_members.cc

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// std::numpunct implementation details, GNU version -*- C++ -*-

// Copyright (C) 2001, 2002, 2003, 2004 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// 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.

//
// ISO C++ 14882: 22.2.3.1.2  numpunct virtual functions
//

// Written by Benjamin Kosnik <[e-mail]>

#include <locale>
#include <bits/c++locale_internal.h>

namespace std
{
  template<> 
    void
    numpunct<char>::_M_initialize_numpunct(__c_locale __cloc)
    {
      if (!_M_data)
	_M_data = new __numpunct_cache<char>;

      if (!__cloc)
	{
	  // "C" locale
	  _M_data->_M_grouping = "";
	  _M_data->_M_grouping_size = 0;
	  _M_data->_M_use_grouping = false;

	  _M_data->_M_decimal_point = '.';
	  _M_data->_M_thousands_sep = ',';

	  for (size_t __i = 0; __i < __num_base::_S_oend; ++__i)
	    _M_data->_M_atoms_out[__i] = __num_base::_S_atoms_out[__i];

	  for (size_t __j = 0; __j < __num_base::_S_iend; ++__j)
	    _M_data->_M_atoms_in[__j] = __num_base::_S_atoms_in[__j];
	}
      else
	{
	  // Named locale.
	  _M_data->_M_decimal_point = *(__nl_langinfo_l(DECIMAL_POINT, 
							__cloc));
	  _M_data->_M_thousands_sep = *(__nl_langinfo_l(THOUSANDS_SEP, 
							__cloc));

	  // Check for NULL, which implies no grouping.
	  if (_M_data->_M_thousands_sep == '\0')
	    _M_data->_M_grouping = "";
	  else
	    _M_data->_M_grouping = __nl_langinfo_l(GROUPING, __cloc);
	  _M_data->_M_grouping_size = strlen(_M_data->_M_grouping);
	}

      // NB: There is no way to extact this info from posix locales.
      // _M_truename = __nl_langinfo_l(YESSTR, __cloc);
      _M_data->_M_truename = "true";
      _M_data->_M_truename_size = 4;
      // _M_falsename = __nl_langinfo_l(NOSTR, __cloc);
      _M_data->_M_falsename = "false";
      _M_data->_M_falsename_size = 5;
    }
 
  template<> 
    numpunct<char>::~numpunct()
    { delete _M_data; }
   
#ifdef _GLIBCXX_USE_WCHAR_T
  template<> 
    void
    numpunct<wchar_t>::_M_initialize_numpunct(__c_locale __cloc)
    {
      if (!_M_data)
	_M_data = new __numpunct_cache<wchar_t>;

      if (!__cloc)
	{
	  // "C" locale
	  _M_data->_M_grouping = "";
	  _M_data->_M_grouping_size = 0;
	  _M_data->_M_use_grouping = false;

	  _M_data->_M_decimal_point = L'.';
	  _M_data->_M_thousands_sep = L',';

	  // Use ctype::widen code without the facet...
	  for (size_t __i = 0; __i < __num_base::_S_oend; ++__i)
	    _M_data->_M_atoms_out[__i] =
	      static_cast<wchar_t>(__num_base::_S_atoms_out[__i]);

	  for (size_t __j = 0; __j < __num_base::_S_iend; ++__j)
	    _M_data->_M_atoms_in[__j] =
	      static_cast<wchar_t>(__num_base::_S_atoms_in[__j]);
	}
      else
	{
	  // Named locale.
	  // NB: In the GNU model wchar_t is always 32 bit wide.
	  union { char *__s; wchar_t __w; } __u;
	  __u.__s = __nl_langinfo_l(_NL_NUMERIC_DECIMAL_POINT_WC, __cloc);
	  _M_data->_M_decimal_point = __u.__w;

	  __u.__s = __nl_langinfo_l(_NL_NUMERIC_THOUSANDS_SEP_WC, __cloc);
	  _M_data->_M_thousands_sep = __u.__w;

	  if (_M_data->_M_thousands_sep == L'\0')
	    _M_data->_M_grouping = "";
	  else
	    _M_data->_M_grouping = __nl_langinfo_l(GROUPING, __cloc);
	  _M_data->_M_grouping_size = strlen(_M_data->_M_grouping);
	}

      // NB: There is no way to extact this info from posix locales.
      // _M_truename = __nl_langinfo_l(YESSTR, __cloc);
      _M_data->_M_truename = L"true";
      _M_data->_M_truename_size = 4;
      // _M_falsename = __nl_langinfo_l(NOSTR, __cloc);
      _M_data->_M_falsename = L"false";
      _M_data->_M_falsename_size = 5;
    }

  template<> 
    numpunct<wchar_t>::~numpunct()
    { delete _M_data; }
 #endif
}