gcc/libstdc++-v3/config/locale/gnu/numeric_members.cc

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

// Copyright (C) 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.

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

// Written by Benjamin Kosnik <bkoz@redhat.com>

#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_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];
	  _M_data->_M_atoms_out[__num_base::_S_oend] = char();

	  for (size_t i = 0; i < __num_base::_S_iend; ++i)
	    _M_data->_M_atoms_in[i] = __num_base::_S_atoms_in[i];
	  _M_data->_M_atoms_in[__num_base::_S_iend] = char();
	}
      else
	{
	  // Named locale.
	  _M_data->_M_decimal_point = *(__nl_langinfo_l(RADIXCHAR, __cloc));
	  _M_data->_M_thousands_sep = *(__nl_langinfo_l(THOUSEP, __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);
	}
      // 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_falsename = __nl_langinfo_l(NOSTR, __cloc);
      _M_data->_M_falsename = "false";
    }
 
  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_use_grouping = false;

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

#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	  __c_locale __old = __uselocale(_S_c_locale);
#endif
	  // Use ctype::widen code without the facet...
	  unsigned char uc;
	  for (size_t i = 0; i < __num_base::_S_oend; ++i)
	    {
	      uc = static_cast<unsigned char>(__num_base::_S_atoms_out[i]);
	      _M_data->_M_atoms_out[i] = btowc(uc);
	    }
	  _M_data->_M_atoms_out[__num_base::_S_oend] = wchar_t();

	  for (size_t i = 0; i < __num_base::_S_iend; ++i)
	    {
	      uc = static_cast<unsigned char>(__num_base::_S_atoms_in[i]);
	      _M_data->_M_atoms_in[i] = btowc(uc);
	    }
	  _M_data->_M_atoms_in[__num_base::_S_iend] = wchar_t();
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	  __uselocale(__old);
#endif
	}
      else
	{
	  // Named locale.
	  union __s_and_w { const char *__s; unsigned int __w; } __u;
	  __u.__s = __nl_langinfo_l(_NL_NUMERIC_DECIMAL_POINT_WC, __cloc);
	  _M_data->_M_decimal_point = static_cast<wchar_t>(__u.__w);

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

	  if (_M_data->_M_thousands_sep == L'\0')
	    _M_data->_M_grouping = "";
	  else
	    _M_data->_M_grouping = __nl_langinfo_l(GROUPING, __cloc);
	}
      // 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_falsename = __nl_langinfo_l(NOSTR, __cloc);
      _M_data->_M_falsename = L"false";
    }

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