locale_facets.tcc

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	  if (++__beg != __end)
	    __c = *__beg;
	  else
	    __testeof = true;
        }

      // Digit grouping is checked. If grouping and found_grouping don't
      // match, then get very very upset, and set failbit.
      if (__found_grouping.size())
        {
          // Add the ending grouping if a decimal or 'e'/'E' wasn't found.
	  if (!__found_dec && !__found_sci)
	    __found_grouping += static_cast<char>(__sep_pos);

          if (!std::__verify_grouping(__lc->_M_grouping, 
				      __lc->_M_grouping_size,
				      __found_grouping))
	    __err |= ios_base::failbit;
        }

      // Finish up.
      if (__testeof)
        __err |= ios_base::eofbit;
      return __beg;
    }

  template<typename _ValueT>
    struct __to_unsigned_type
    { typedef _ValueT __type; };

  template<>
    struct __to_unsigned_type<long>
    { typedef unsigned long __type; };

#ifdef _GLIBCXX_USE_LONG_LONG
  template<>
    struct __to_unsigned_type<long long>
    { typedef unsigned long long __type; };
#endif

  template<typename _CharT, typename _InIter>
    template<typename _ValueT>
      _InIter
      num_get<_CharT, _InIter>::
      _M_extract_int(_InIter __beg, _InIter __end, ios_base& __io,
		     ios_base::iostate& __err, _ValueT& __v) const
      {
        typedef char_traits<_CharT>			     __traits_type;
	typedef typename __to_unsigned_type<_ValueT>::__type __unsigned_type;
	typedef __numpunct_cache<_CharT>                     __cache_type;
	__use_cache<__cache_type> __uc;
	const locale& __loc = __io._M_getloc();
	const __cache_type* __lc = __uc(__loc);
	const _CharT* __lit = __lc->_M_atoms_in;
	char_type __c = char_type();

	// NB: Iff __basefield == 0, __base can change based on contents.
	const ios_base::fmtflags __basefield = __io.flags()
	                                       & ios_base::basefield;
	const bool __oct = __basefield == ios_base::oct;
	int __base = __oct ? 8 : (__basefield == ios_base::hex ? 16 : 10);

	// True if __beg becomes equal to __end.
	bool __testeof = __beg == __end;

	// First check for sign.
	bool __negative = false;
	if (!__testeof)
	  {
	    __c = *__beg;
	    if (numeric_limits<_ValueT>::is_signed)
	      __negative = __c == __lit[__num_base::_S_iminus];
	    if ((__negative || __c == __lit[__num_base::_S_iplus])
		&& !(__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
		&& !(__c == __lc->_M_decimal_point))
	      {
		if (++__beg != __end)
		  __c = *__beg;
		else
		  __testeof = true;
	      }
	  }

	// Next, look for leading zeros and check required digits
	// for base formats.
	bool __found_zero = false;
	int __sep_pos = 0;
	while (!__testeof)
	  {
	    if (__lc->_M_use_grouping && __c == __lc->_M_thousands_sep
		|| __c == __lc->_M_decimal_point)
	      break;
	    else if (__c == __lit[__num_base::_S_izero] 
		     && (!__found_zero || __base == 10))
	      {
		__found_zero = true;
		++__sep_pos;
		if (__basefield == 0)
		  __base = 8;
		if (__base == 8)
		  __sep_pos = 0;
	      }
	    else if (__found_zero
		     && (__c == __lit[__num_base::_S_ix]
			 || __c == __lit[__num_base::_S_iX]))
	      {
		if (__basefield == 0)
		  __base = 16;
		if (__base == 16)
		  {
		    __found_zero = false;
		    __sep_pos = 0;
		  }
		else
		  break;
	      }
	    else
	      break;

	    if (++__beg != __end)
	      {
		__c = *__beg;
		if (!__found_zero)
		  break;
	      }
	    else
	      __testeof = true;
	  }
	
	// At this point, base is determined. If not hex, only allow
	// base digits as valid input.
	const size_t __len = (__base == 16 ? __num_base::_S_iend
			      - __num_base::_S_izero : __base);

	// Extract.
	string __found_grouping;
	if (__lc->_M_use_grouping)
	  __found_grouping.reserve(32);
	bool __testfail = false;
	const __unsigned_type __max = __negative ?
	  -numeric_limits<_ValueT>::min() : numeric_limits<_ValueT>::max();
	const __unsigned_type __smax = __max / __base;
	__unsigned_type __result = 0;
	const char_type* __q;
	const char_type* __lit_zero = __lit + __num_base::_S_izero;
	while (!__testeof)
	  {
	    // According to 22.2.2.1.2, p8-9, first look for thousands_sep
	    // and decimal_point.
	    if (__lc->_M_use_grouping && __c == __lc->_M_thousands_sep)
	      {
		// NB: Thousands separator at the beginning of a string
		// is a no-no, as is two consecutive thousands separators.
		if (__sep_pos)
		  {
		    __found_grouping += static_cast<char>(__sep_pos);
		    __sep_pos = 0;
		  }
		else
		  {
		    __testfail = true;
		    break;
		  }
	      }
	    else if (__c == __lc->_M_decimal_point)
	      break;
	    else if ((__q = __traits_type::find(__lit_zero, __len, __c)))
	      {
		int __digit = __q - __lit_zero;
		if (__digit > 15)
		  __digit -= 6;
		if (__result > __smax)
		  __testfail = true;
		else
		  {
		    __result *= __base;
		    __testfail |= __result > __max - __digit;
		    __result += __digit;
		    ++__sep_pos;
		  }
	      }
	    else
	      // Not a valid input item.	      
	      break;
	    
	    if (++__beg != __end)
	      __c = *__beg;
	    else
	      __testeof = true;
	  }

	// Digit grouping is checked. If grouping and found_grouping don't
	// match, then get very very upset, and set failbit.
	if (__found_grouping.size())
	  {
	    // Add the ending grouping.
	    __found_grouping += static_cast<char>(__sep_pos);

	    if (!std::__verify_grouping(__lc->_M_grouping,
					__lc->_M_grouping_size,
					__found_grouping))
	      __err |= ios_base::failbit;
	  }

	if (!__testfail && (__sep_pos || __found_zero 
			    || __found_grouping.size()))
	  __v = __negative ? -__result : __result;
	else
	  __err |= ios_base::failbit;

	if (__testeof)
	  __err |= ios_base::eofbit;
	return __beg;
      }

  // _GLIBCXX_RESOLVE_LIB_DEFECTS
  // 17.  Bad bool parsing
  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, bool& __v) const
    {
      if (!(__io.flags() & ios_base::boolalpha))
        {
	  // Parse bool values as long.
          // NB: We can't just call do_get(long) here, as it might
          // refer to a derived class.
	  long __l = -1;
          __beg = _M_extract_int(__beg, __end, __io, __err, __l);
	  if (__l == 0 || __l == 1)
	    __v = __l;
	  else
            __err |= ios_base::failbit;
        }
      else
        {
	  // Parse bool values as alphanumeric.
	  typedef __numpunct_cache<_CharT>              __cache_type;
	  __use_cache<__cache_type> __uc;
	  const locale& __loc = __io._M_getloc();
	  const __cache_type* __lc = __uc(__loc);

	  bool __testf = true;
	  bool __testt = true;
	  size_t __n;
	  bool __testeof = __beg == __end;
          for (__n = 0; !__testeof; ++__n)
            {
	      const char_type __c = *__beg;

	      if (__testf)
		if (__n < __lc->_M_falsename_size)
		  __testf = __c == __lc->_M_falsename[__n];
		else
		  break;

	      if (__testt)
		if (__n < __lc->_M_truename_size)
		  __testt = __c == __lc->_M_truename[__n];
		else
		  break;

	      if (!__testf && !__testt)
		break;
	      
	      if (++__beg == __end)
		__testeof = true;
            }
	  if (__testf && __n == __lc->_M_falsename_size)
	    __v = 0;
	  else if (__testt && __n == __lc->_M_truename_size)
	    __v = 1;
	  else
	    __err |= ios_base::failbit;

          if (__testeof)
            __err |= ios_base::eofbit;
        }
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, long& __v) const
    { return _M_extract_int(__beg, __end, __io, __err, __v); }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, unsigned short& __v) const
    { return _M_extract_int(__beg, __end, __io, __err, __v); }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, unsigned int& __v) const
    { return _M_extract_int(__beg, __end, __io, __err, __v); }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, unsigned long& __v) const
    { return _M_extract_int(__beg, __end, __io, __err, __v); }

#ifdef _GLIBCXX_USE_LONG_LONG
  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, long long& __v) const
    { return _M_extract_int(__beg, __end, __io, __err, __v); }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, unsigned long long& __v) const
    { return _M_extract_int(__beg, __end, __io, __err, __v); }
#endif

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
	   ios_base::iostate& __err, float& __v) const
    {
      string __xtrc;
      __xtrc.reserve(32);
      __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
      std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, double& __v) const
    {
      string __xtrc;
      __xtrc.reserve(32);
      __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
      std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, long double& __v) const
    {
      string __xtrc;
      __xtrc.reserve(32);
      __beg = _M_extract_float(__beg, __end, __io, __err, __xtrc);
      std::__convert_to_v(__xtrc.c_str(), __v, __err, _S_get_c_locale());
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    num_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, void*& __v) const
    {
      // Prepare for hex formatted input.
      typedef ios_base::fmtflags        fmtflags;
      const fmtflags __fmt = __io.flags();
      __io.flags(__fmt & ~ios_base::basefield | ios_base::hex);

      unsigned long __ul;
      __beg = _M_extract_int(__beg, __end, __io, __err, __ul);

      // Reset from hex formatted input.
      __io.flags(__fmt);

      if (!(__err & ios_base::failbit))
	__v = reinterpret_cast<void*>(__ul);
      return __beg;
    }

  // For use by integer and floating-point types after they have been
  // converted into a char_type string.
  template<typename _CharT, typename _OutIter>
    void
    num_put<_CharT, _OutIter>::
    _M_pad(_CharT __fill, streamsize __w, ios_base& __io,
	   _CharT* __new, const _CharT* __cs, int& __len) const
    {
      // [22.2.2.2.2] Stage 3.
      // If necessary, pad.
      __pad<_CharT, char_traits<_CharT> >::_S_pad(__io, __fill, __new, __cs,
						  __w, __len, true);
      __len = static_cast<int>(__w);
    }

  // Forwarding functions to peel signed from unsigned integer types and
  // either cast or compute the absolute value for the former, depending
  // on __basefield.
  template<typename _CharT>
    inline int
    __int_to_char(_CharT* __bufend, long __v, const _CharT* __lit,
		  ios_base::fmtflags __flags)
    {
      unsigned long __ul = __v;
      const ios_base::fmtflags __basefield = __flags & ios_base::basefield;
      if (__builtin_expect(__basefield != ios_base::oct
			   && __basefield != ios_base::hex, true))
	__ul = __v < 0 ? -__v : __ul;
      return __int_to_char(__bufend, __ul, __lit, __flags, false);
    }

  template<typename _CharT>
    inline int
    __int_to_char(_CharT* __bufend, unsigned long __v, const _CharT* __lit,
		  ios_base::fmtflags __flags)