// std::moneypunct 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, 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: 22.2.6.3.2  moneypunct virtual functions
//

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

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

namespace std
{
  // Construct and return valid pattern consisting of some combination of:
  // space none symbol sign value
  money_base::pattern
  money_base::_S_construct_pattern(char __precedes, char __space, char __posn)
  { 
    pattern __ret;

    // This insanely complicated routine attempts to construct a valid
    // pattern for use with monyepunct. A couple of invariants:

    // if (__precedes) symbol -> value
    // else value -> symbol
    
    // if (__space) space
    // else none

    // none == never first
    // space never first or last

    // Any elegant implementations of this are welcome.
    switch (__posn)
      {
      case 0:
      case 1:
	// 1 The sign precedes the value and symbol.
	__ret.field[0] = sign;
	if (__space)
	  {
	    // Pattern starts with sign.
	    if (__precedes)
	      {
		__ret.field[1] = symbol;
		__ret.field[3] = value;
	      }
	    else
	      {
		__ret.field[1] = value;
		__ret.field[3] = symbol;
	      }
	    __ret.field[2] = space;
	  }
	else
	  {
	    // Pattern starts with sign and ends with none.
	    if (__precedes)
	      {
		__ret.field[1] = symbol;
		__ret.field[2] = value;
	      }
	    else
	      {
		__ret.field[1] = value;
		__ret.field[2] = symbol;
	      }
	    __ret.field[3] = none;
	  }
	break;
      case 2:
	// 2 The sign follows the value and symbol.
	if (__space)
	  {
	    // Pattern either ends with sign.
	    if (__precedes)
	      {
		__ret.field[0] = symbol;
		__ret.field[2] = value;
	      }
	    else
	      {
		__ret.field[0] = value;
		__ret.field[2] = symbol;
	      }
	    __ret.field[1] = space;
	    __ret.field[3] = sign;
	  }
	else
	  {
	    // Pattern ends with sign then none.
	    if (__precedes)
	      {
		__ret.field[0] = symbol;
		__ret.field[1] = value;
	      }
	    else
	      {
		__ret.field[0] = value;
		__ret.field[1] = symbol;
	      }
	    __ret.field[2] = sign;
	    __ret.field[3] = none;
	  }
	break;
      case 3:
	// 3 The sign immediately precedes the symbol.
	if (__precedes)
	  {
	    __ret.field[0] = sign;
	    __ret.field[1] = symbol;	    
	    if (__space)
	      {
		__ret.field[2] = space;
		__ret.field[3] = value;
	      }
	    else
	      {
		__ret.field[2] = value;		
		__ret.field[3] = none;
	      }
	  }
	else
	  {
	    __ret.field[0] = value;
	    if (__space)
	      {
		__ret.field[1] = space;
		__ret.field[2] = sign;
		__ret.field[3] = symbol;
	      }
	    else
	      {
		__ret.field[1] = sign;
		__ret.field[2] = symbol;
		__ret.field[3] = none;
	      }
	  }
	break;
      case 4:
	// 4 The sign immediately follows the symbol.
	if (__precedes)
	  {
	    __ret.field[0] = symbol;
	    __ret.field[1] = sign;
	    if (__space)
	      {
		__ret.field[2] = space;
		__ret.field[3] = value;
	      }
	    else
	      {
		__ret.field[2] = value;
		__ret.field[3] = none;
	      }
	  }
	else
	  {
	    __ret.field[0] = value;
	    if (__space)
	      {
		__ret.field[1] = space;
		__ret.field[2] = symbol;
		__ret.field[3] = sign;
	      }
	    else
	      {
		__ret.field[1] = symbol;
		__ret.field[2] = sign;
		__ret.field[3] = none;
	      }
	  }
	break;
      default:
	__ret = pattern();
      }
    return __ret;
  }

  template<> 
    void
    moneypunct<char, true>::_M_initialize_moneypunct(__c_locale __cloc, 
						     const char*)
    {
      if (!_M_data)
	_M_data = new __moneypunct_cache<char, true>;

      if (!__cloc)
	{
	  // "C" locale
	  _M_data->_M_decimal_point = '.';
	  _M_data->_M_thousands_sep = ',';
	  _M_data->_M_grouping = "";
	  _M_data->_M_grouping_size = 0;
	  _M_data->_M_curr_symbol = "";
	  _M_data->_M_curr_symbol_size = 0;
	  _M_data->_M_positive_sign = "";
	  _M_data->_M_positive_sign_size = 0;
	  _M_data->_M_negative_sign = "";
	  _M_data->_M_negative_sign_size = 0;
	  _M_data->_M_frac_digits = 0;
	  _M_data->_M_pos_format = money_base::_S_default_pattern;
	  _M_data->_M_neg_format = money_base::_S_default_pattern;

	  for (size_t __i = 0; __i < money_base::_S_end; ++__i)
	    _M_data->_M_atoms[__i] = money_base::_S_atoms[__i];
	}
      else
	{
	  // Named locale.
	  _M_data->_M_decimal_point = *(__nl_langinfo_l(__MON_DECIMAL_POINT, 
							__cloc));
	  _M_data->_M_thousands_sep = *(__nl_langinfo_l(__MON_THOUSANDS_SEP, 
							__cloc));
	  _M_data->_M_grouping = __nl_langinfo_l(__MON_GROUPING, __cloc);
	  _M_data->_M_grouping_size = strlen(_M_data->_M_grouping);
	  _M_data->_M_positive_sign = __nl_langinfo_l(__POSITIVE_SIGN, __cloc);
	  _M_data->_M_positive_sign_size = strlen(_M_data->_M_positive_sign);

	  char __nposn = *(__nl_langinfo_l(__INT_N_SIGN_POSN, __cloc));
	  if (!__nposn)
	    _M_data->_M_negative_sign = "()";
	  else
	    _M_data->_M_negative_sign = __nl_langinfo_l(__NEGATIVE_SIGN, 
							__cloc);
	  _M_data->_M_negative_sign_size = strlen(_M_data->_M_negative_sign);

	  // _Intl == true
	  _M_data->_M_curr_symbol = __nl_langinfo_l(__INT_CURR_SYMBOL, __cloc);
	  _M_data->_M_curr_symbol_size = strlen(_M_data->_M_curr_symbol);
	  _M_data->_M_frac_digits = *(__nl_langinfo_l(__INT_FRAC_DIGITS, 
						      __cloc));
	  char __pprecedes = *(__nl_langinfo_l(__INT_P_CS_PRECEDES, __cloc));
	  char __pspace = *(__nl_langinfo_l(__INT_P_SEP_BY_SPACE, __cloc));
	  char __pposn = *(__nl_langinfo_l(__INT_P_SIGN_POSN, __cloc));
	  _M_data->_M_pos_format = _S_construct_pattern(__pprecedes, __pspace, 
							__pposn);
	  char __nprecedes = *(__nl_langinfo_l(__INT_N_CS_PRECEDES, __cloc));
	  char __nspace = *(__nl_langinfo_l(__INT_N_SEP_BY_SPACE, __cloc));
	  _M_data->_M_neg_format = _S_construct_pattern(__nprecedes, __nspace, 
							__nposn);
	}
    }

  template<> 
    void
    moneypunct<char, false>::_M_initialize_moneypunct(__c_locale __cloc, 
						      const char*)
    {
      if (!_M_data)
	_M_data = new __moneypunct_cache<char, false>;

      if (!__cloc)
	{
	  // "C" locale
	  _M_data->_M_decimal_point = '.';
	  _M_data->_M_thousands_sep = ',';
	  _M_data->_M_grouping = "";
	  _M_data->_M_grouping_size = 0;
	  _M_data->_M_curr_symbol = "";
	  _M_data->_M_curr_symbol_size = 0;
	  _M_data->_M_positive_sign = "";
	  _M_data->_M_positive_sign_size = 0;
	  _M_data->_M_negative_sign = "";
	  _M_data->_M_negative_sign_size = 0;
	  _M_data->_M_frac_digits = 0;
	  _M_data->_M_pos_format = money_base::_S_default_pattern;
	  _M_data->_M_neg_format = money_base::_S_default_pattern;

	  for (size_t __i = 0; __i < money_base::_S_end; ++__i)
	    _M_data->_M_atoms[__i] = money_base::_S_atoms[__i];
	}
      else
	{
	  // Named locale.
	  _M_data->_M_decimal_point = *(__nl_langinfo_l(__MON_DECIMAL_POINT, 
							__cloc));
	  _M_data->_M_thousands_sep = *(__nl_langinfo_l(__MON_THOUSANDS_SEP, 
							__cloc));
	  _M_data->_M_grouping = __nl_langinfo_l(__MON_GROUPING, __cloc);
	  _M_data->_M_grouping_size = strlen(_M_data->_M_grouping);
	  _M_data->_M_positive_sign = __nl_langinfo_l(__POSITIVE_SIGN, __cloc);
	  _M_data->_M_positive_sign_size = strlen(_M_data->_M_positive_sign);

	  char __nposn = *(__nl_langinfo_l(__N_SIGN_POSN, __cloc));
	  if (!__nposn)
	    _M_data->_M_negative_sign = "()";
	  else
	    _M_data->_M_negative_sign = __nl_langinfo_l(__NEGATIVE_SIGN,
							__cloc);
	  _M_data->_M_negative_sign_size = strlen(_M_data->_M_negative_sign);

	  // _Intl == false
	  _M_data->_M_curr_symbol = __nl_langinfo_l(__CURRENCY_SYMBOL, __cloc);
	  _M_data->_M_curr_symbol_size = strlen(_M_data->_M_curr_symbol);
	  _M_data->_M_frac_digits = *(__nl_langinfo_l(__FRAC_DIGITS, __cloc));
	  char __pprecedes = *(__nl_langinfo_l(__P_CS_PRECEDES, __cloc));
	  char __pspace = *(__nl_langinfo_l(__P_SEP_BY_SPACE, __cloc));
	  char __pposn = *(__nl_langinfo_l(__P_SIGN_POSN, __cloc));
	  _M_data->_M_pos_format = _S_construct_pattern(__pprecedes, __pspace, 
							__pposn);
	  char __nprecedes = *(__nl_langinfo_l(__N_CS_PRECEDES, __cloc));
	  char __nspace = *(__nl_langinfo_l(__N_SEP_BY_SPACE, __cloc));
	  _M_data->_M_neg_format = _S_construct_pattern(__nprecedes, __nspace, 
							__nposn);
	}
    }

  template<> 
    moneypunct<char, true>::~moneypunct()
    { delete _M_data; }

  template<> 
    moneypunct<char, false>::~moneypunct()
    { delete _M_data; }

#ifdef _GLIBCXX_USE_WCHAR_T
  template<> 
    void
    moneypunct<wchar_t, true>::_M_initialize_moneypunct(__c_locale __cloc, 
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
							const char*)
#else
							const char* __name)
#endif
    {
      if (!_M_data)
	_M_data = new __moneypunct_cache<wchar_t, true>;

      if (!__cloc)
	{
	  // "C" locale
	  _M_data->_M_decimal_point = L'.';
	  _M_data->_M_thousands_sep = L',';
	  _M_data->_M_grouping = "";
	  _M_data->_M_grouping_size = 0;
	  _M_data->_M_curr_symbol = L"";
	  _M_data->_M_curr_symbol_size = 0;
	  _M_data->_M_positive_sign = L"";
	  _M_data->_M_positive_sign_size = 0;
	  _M_data->_M_negative_sign = L"";
	  _M_data->_M_negative_sign_size = 0;
	  _M_data->_M_frac_digits = 0;
	  _M_data->_M_pos_format = money_base::_S_default_pattern;
	  _M_data->_M_neg_format = money_base::_S_default_pattern;

	  // Use ctype::widen code without the facet...
	  for (size_t __i = 0; __i < money_base::_S_end; ++__i)
	    _M_data->_M_atoms[__i] =
	      static_cast<wchar_t>(money_base::_S_atoms[__i]);
	}
      else
	{
	  // Named locale.
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	  __c_locale __old = __uselocale(__cloc);
#else
	  // Switch to named locale so that mbsrtowcs will work.
	  char* __old = strdup(setlocale(LC_ALL, NULL));
	  setlocale(LC_ALL, __name);
#endif

	  union { char *__s; wchar_t __w; } __u;
	  __u.__s = __nl_langinfo_l(_NL_MONETARY_DECIMAL_POINT_WC, __cloc);
	  _M_data->_M_decimal_point = __u.__w;

	  __u.__s = __nl_langinfo_l(_NL_MONETARY_THOUSANDS_SEP_WC, __cloc);
	  _M_data->_M_thousands_sep = __u.__w;
	  _M_data->_M_grouping = __nl_langinfo_l(__MON_GROUPING, __cloc);
	  _M_data->_M_grouping_size = strlen(_M_data->_M_grouping);

	  const char* __cpossign = __nl_langinfo_l(__POSITIVE_SIGN, __cloc);
	  const char* __cnegsign = __nl_langinfo_l(__NEGATIVE_SIGN, __cloc);
	  const char* __ccurr = __nl_langinfo_l(__INT_CURR_SYMBOL, __cloc);

	  wchar_t* __wcs_ps = 0;
	  wchar_t* __wcs_ns = 0;
	  const char __nposn = *(__nl_langinfo_l(__INT_N_SIGN_POSN, __cloc));
	  try
	    {
	      mbstate_t __state;
	      size_t __len = strlen(__cpossign);
	      if (__len)
		{
		  ++__len;
		  memset(&__state, 0, sizeof(mbstate_t));
		  __wcs_ps = new wchar_t[__len];
		  mbsrtowcs(__wcs_ps, &__cpossign, __len, &__state);
		  _M_data->_M_positive_sign = __wcs_ps;
		}
	      else
		_M_data->_M_positive_sign = L"";
	      _M_data->_M_positive_sign_size = wcslen(_M_data->_M_positive_sign);
	      
	      __len = strlen(__cnegsign);
	      if (!__nposn)
		_M_data->_M_negative_sign = L"()";
	      else if (__len)
		{ 
		  ++__len;
		  memset(&__state, 0, sizeof(mbstate_t));
		  __wcs_ns = new wchar_t[__len];
		  mbsrtowcs(__wcs_ns, &__cnegsign, __len, &__state);
		  _M_data->_M_negative_sign = __wcs_ns;
		}
	      else
		_M_data->_M_negative_sign = L"";
	      _M_data->_M_negative_sign_size = wcslen(_M_data->_M_negative_sign);
	      
	      // _Intl == true.
	      __len = strlen(__ccurr);
	      if (__len)
		{
		  ++__len;
		  memset(&__state, 0, sizeof(mbstate_t));
		  wchar_t* __wcs = new wchar_t[__len];
		  mbsrtowcs(__wcs, &__ccurr, __len, &__state);
		  _M_data->_M_curr_symbol = __wcs;
		}
	      else
		_M_data->_M_curr_symbol = L"";
	      _M_data->_M_curr_symbol_size = wcslen(_M_data->_M_curr_symbol);
	    }
	  catch (...)
	    {
	      delete _M_data;
	      _M_data = 0;
	      delete __wcs_ps;
	      delete __wcs_ns;	      
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	      __uselocale(__old);
#else
	      setlocale(LC_ALL, __old);
	      free(__old);
#endif
	      __throw_exception_again;
	    } 
	  
	  _M_data->_M_frac_digits = *(__nl_langinfo_l(__INT_FRAC_DIGITS, 
						      __cloc));
	  char __pprecedes = *(__nl_langinfo_l(__INT_P_CS_PRECEDES, __cloc));
	  char __pspace = *(__nl_langinfo_l(__INT_P_SEP_BY_SPACE, __cloc));
	  char __pposn = *(__nl_langinfo_l(__INT_P_SIGN_POSN, __cloc));
	  _M_data->_M_pos_format = _S_construct_pattern(__pprecedes, __pspace, 
							__pposn);
	  char __nprecedes = *(__nl_langinfo_l(__INT_N_CS_PRECEDES, __cloc));
	  char __nspace = *(__nl_langinfo_l(__INT_N_SEP_BY_SPACE, __cloc));
	  _M_data->_M_neg_format = _S_construct_pattern(__nprecedes, __nspace, 
							__nposn);

#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	  __uselocale(__old);
#else
	  setlocale(LC_ALL, __old);
	  free(__old);
#endif
	}
    }

  template<> 
  void
  moneypunct<wchar_t, false>::_M_initialize_moneypunct(__c_locale __cloc,
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
						       const char*)
#else
                                                       const char* __name)
#endif
  {
    if (!_M_data)
      _M_data = new __moneypunct_cache<wchar_t, false>;

    if (!__cloc)
	{
	  // "C" locale
	  _M_data->_M_decimal_point = L'.';
	  _M_data->_M_thousands_sep = L',';
	  _M_data->_M_grouping = "";
          _M_data->_M_grouping_size = 0;
	  _M_data->_M_curr_symbol = L"";
	  _M_data->_M_curr_symbol_size = 0;
	  _M_data->_M_positive_sign = L"";
	  _M_data->_M_positive_sign_size = 0;
	  _M_data->_M_negative_sign = L"";
	  _M_data->_M_negative_sign_size = 0;
	  _M_data->_M_frac_digits = 0;
	  _M_data->_M_pos_format = money_base::_S_default_pattern;
	  _M_data->_M_neg_format = money_base::_S_default_pattern;

	  // Use ctype::widen code without the facet...
	  for (size_t __i = 0; __i < money_base::_S_end; ++__i)
	    _M_data->_M_atoms[__i] =
	      static_cast<wchar_t>(money_base::_S_atoms[__i]);
	}
      else
	{
	  // Named locale.
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	  __c_locale __old = __uselocale(__cloc);
#else
	  // Switch to named locale so that mbsrtowcs will work.
	  char* __old = strdup(setlocale(LC_ALL, NULL));
	  setlocale(LC_ALL, __name);
#endif

          union { char *__s; wchar_t __w; } __u;
	  __u.__s = __nl_langinfo_l(_NL_MONETARY_DECIMAL_POINT_WC, __cloc);
	  _M_data->_M_decimal_point = __u.__w;

	  __u.__s = __nl_langinfo_l(_NL_MONETARY_THOUSANDS_SEP_WC, __cloc);
	  _M_data->_M_thousands_sep = __u.__w;
	  _M_data->_M_grouping = __nl_langinfo_l(__MON_GROUPING, __cloc);
          _M_data->_M_grouping_size = strlen(_M_data->_M_grouping);

	  const char* __cpossign = __nl_langinfo_l(__POSITIVE_SIGN, __cloc);
	  const char* __cnegsign = __nl_langinfo_l(__NEGATIVE_SIGN, __cloc);
	  const char* __ccurr = __nl_langinfo_l(__CURRENCY_SYMBOL, __cloc);

	  wchar_t* __wcs_ps = 0;
	  wchar_t* __wcs_ns = 0;
	  const char __nposn = *(__nl_langinfo_l(__N_SIGN_POSN, __cloc));
	  try
            {
              mbstate_t __state;
              size_t __len;
              __len = strlen(__cpossign);
              if (__len)
                {
		  ++__len;
		  memset(&__state, 0, sizeof(mbstate_t));
		  __wcs_ps = new wchar_t[__len];
		  mbsrtowcs(__wcs_ps, &__cpossign, __len, &__state);
		  _M_data->_M_positive_sign = __wcs_ps;
		}
	      else
		_M_data->_M_positive_sign = L"";
              _M_data->_M_positive_sign_size = wcslen(_M_data->_M_positive_sign);
	      
	      __len = strlen(__cnegsign);
	      if (!__nposn)
		_M_data->_M_negative_sign = L"()";
	      else if (__len)
		{ 
		  ++__len;
		  memset(&__state, 0, sizeof(mbstate_t));
		  __wcs_ns = new wchar_t[__len];
		  mbsrtowcs(__wcs_ns, &__cnegsign, __len, &__state);
		  _M_data->_M_negative_sign = __wcs_ns;
		}
	      else
		_M_data->_M_negative_sign = L"";
              _M_data->_M_negative_sign_size = wcslen(_M_data->_M_negative_sign);

	      // _Intl == true.
	      __len = strlen(__ccurr);
	      if (__len)
		{
		  ++__len;
		  memset(&__state, 0, sizeof(mbstate_t));
		  wchar_t* __wcs = new wchar_t[__len];
		  mbsrtowcs(__wcs, &__ccurr, __len, &__state);
		  _M_data->_M_curr_symbol = __wcs;
		}
	      else
		_M_data->_M_curr_symbol = L"";
              _M_data->_M_curr_symbol_size = wcslen(_M_data->_M_curr_symbol);
	    }
          catch (...)
	    {
	      delete _M_data;
              _M_data = 0;
	      delete __wcs_ps;
	      delete __wcs_ns;	      
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	      __uselocale(__old);
#else
	      setlocale(LC_ALL, __old);
	      free(__old);
#endif
              __throw_exception_again;
	    }

	  _M_data->_M_frac_digits = *(__nl_langinfo_l(__FRAC_DIGITS, __cloc));
	  char __pprecedes = *(__nl_langinfo_l(__P_CS_PRECEDES, __cloc));
	  char __pspace = *(__nl_langinfo_l(__P_SEP_BY_SPACE, __cloc));
	  char __pposn = *(__nl_langinfo_l(__P_SIGN_POSN, __cloc));
	  _M_data->_M_pos_format = _S_construct_pattern(__pprecedes, __pspace, 
	                                                __pposn);
	  char __nprecedes = *(__nl_langinfo_l(__N_CS_PRECEDES, __cloc));
	  char __nspace = *(__nl_langinfo_l(__N_SEP_BY_SPACE, __cloc));
	  _M_data->_M_neg_format = _S_construct_pattern(__nprecedes, __nspace, 
	                                                __nposn);

#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
	  __uselocale(__old);
#else
	  setlocale(LC_ALL, __old);
	  free(__old);
#endif
	}
    }

  template<> 
    moneypunct<wchar_t, true>::~moneypunct()
    {
      if (_M_data->_M_positive_sign_size)
	delete [] _M_data->_M_positive_sign;
      if (_M_data->_M_negative_sign_size
          && wcscmp(_M_data->_M_negative_sign, L"()") != 0)
	delete [] _M_data->_M_negative_sign;
      if (_M_data->_M_curr_symbol_size)
	delete [] _M_data->_M_curr_symbol;
      delete _M_data;
    }

  template<> 
    moneypunct<wchar_t, false>::~moneypunct()
    {
      if (_M_data->_M_positive_sign_size)
	delete [] _M_data->_M_positive_sign;
      if (_M_data->_M_negative_sign_size
          && wcscmp(_M_data->_M_negative_sign, L"()") != 0)
	delete [] _M_data->_M_negative_sign;
      if (_M_data->_M_curr_symbol_size)
	delete [] _M_data->_M_curr_symbol;
      delete _M_data;
    }
#endif
}