locale_facets.tcc

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    { return __int_to_char(__bufend, __v, __lit, __flags, false); }

#ifdef _GLIBCXX_USE_LONG_LONG
  template<typename _CharT>
    inline int
    __int_to_char(_CharT* __bufend, long long __v, const _CharT* __lit,
		  ios_base::fmtflags __flags)
    {
      unsigned long long __ull = __v;
      const ios_base::fmtflags __basefield = __flags & ios_base::basefield;
      if (__builtin_expect(__basefield != ios_base::oct
			   && __basefield != ios_base::hex, true))
	__ull = __v < 0 ? -__v : __ull;
      return __int_to_char(__bufend, __ull, __lit, __flags, false);
    }

  template<typename _CharT>
    inline int
    __int_to_char(_CharT* __bufend, unsigned long long __v, 
		  const _CharT* __lit, ios_base::fmtflags __flags)
    { return __int_to_char(__bufend, __v, __lit, __flags, false); }
#endif

  // N.B. The last argument is currently unused (see libstdc++/20914).
  template<typename _CharT, typename _ValueT>
    int
    __int_to_char(_CharT* __bufend, _ValueT __v, const _CharT* __lit,
		  ios_base::fmtflags __flags, bool)
    {
      const ios_base::fmtflags __basefield = __flags & ios_base::basefield;
      _CharT* __buf = __bufend;

      if (__builtin_expect(__basefield != ios_base::oct
			   && __basefield != ios_base::hex, true))
	{
	  // Decimal.
	  do
	    {
	      *--__buf = __lit[(__v % 10) + __num_base::_S_odigits];
	      __v /= 10;
	    }
	  while (__v != 0);
	}
      else if (__basefield == ios_base::oct)
	{
	  // Octal.
	  do
	    {
	      *--__buf = __lit[(__v & 0x7) + __num_base::_S_odigits];
	      __v >>= 3;
	    }
	  while (__v != 0);
	}
      else
	{
	  // Hex.
	  const bool __uppercase = __flags & ios_base::uppercase;
	  const int __case_offset = __uppercase ? __num_base::_S_oudigits
	                                        : __num_base::_S_odigits;
	  do
	    {
	      *--__buf = __lit[(__v & 0xf) + __case_offset];
	      __v >>= 4;
	    }
	  while (__v != 0);
	}
      return __bufend - __buf;
    }

  template<typename _CharT, typename _OutIter>
    void
    num_put<_CharT, _OutIter>::
    _M_group_int(const char* __grouping, size_t __grouping_size, _CharT __sep,
		 ios_base&, _CharT* __new, _CharT* __cs, int& __len) const
    {
      _CharT* __p = std::__add_grouping(__new, __sep, __grouping,
					__grouping_size, __cs, __cs + __len);
      __len = __p - __new;
    }
  
  template<typename _CharT, typename _OutIter>
    template<typename _ValueT>
      _OutIter
      num_put<_CharT, _OutIter>::
      _M_insert_int(_OutIter __s, ios_base& __io, _CharT __fill,
		    _ValueT __v) const
      {
	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_out;
	const ios_base::fmtflags __flags = __io.flags();

	// Long enough to hold hex, dec, and octal representations.
	const int __ilen = 5 * sizeof(_ValueT);
	_CharT* __cs = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
							     * __ilen));

	// [22.2.2.2.2] Stage 1, numeric conversion to character.
	// Result is returned right-justified in the buffer.
	int __len = __int_to_char(__cs + __ilen, __v, __lit, __flags);
	__cs += __ilen - __len;

	// Add grouping, if necessary.
	if (__lc->_M_use_grouping)
	  {
	    // Grouping can add (almost) as many separators as the number
	    // of digits + space is reserved for numeric base or sign.
	    _CharT* __cs2 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
								  * (__len + 1)
								  * 2));
	    _M_group_int(__lc->_M_grouping, __lc->_M_grouping_size,
			 __lc->_M_thousands_sep, __io, __cs2 + 2, __cs, __len);
	    __cs = __cs2 + 2;
	  }

	// Complete Stage 1, prepend numeric base or sign.
	const ios_base::fmtflags __basefield = __flags & ios_base::basefield;
	if (__builtin_expect(__basefield != ios_base::oct
			     && __basefield != ios_base::hex, true))
	  {
	    // Decimal.
	    if (__v > 0)
	      {
		if (__flags & ios_base::showpos
		    && numeric_limits<_ValueT>::is_signed)
		  *--__cs = __lit[__num_base::_S_oplus], ++__len;
	      }
	    else if (__v)
	      *--__cs = __lit[__num_base::_S_ominus], ++__len;
	  }
	else if (__flags & ios_base::showbase && __v)
	  {
	    if (__basefield == ios_base::oct)
	      *--__cs = __lit[__num_base::_S_odigits], ++__len;
	    else
	      {
		// 'x' or 'X'
		const bool __uppercase = __flags & ios_base::uppercase;
		*--__cs = __lit[__num_base::_S_ox + __uppercase];
		// '0'
		*--__cs = __lit[__num_base::_S_odigits];
		__len += 2;
	      }
	  }

	// Pad.
	const streamsize __w = __io.width();
	if (__w > static_cast<streamsize>(__len))
	  {
	    _CharT* __cs3 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
								  * __w));
	    _M_pad(__fill, __w, __io, __cs3, __cs, __len);
	    __cs = __cs3;
	  }
	__io.width(0);

	// [22.2.2.2.2] Stage 4.
	// Write resulting, fully-formatted string to output iterator.
	return std::__write(__s, __cs, __len);
      }

  template<typename _CharT, typename _OutIter>
    void
    num_put<_CharT, _OutIter>::
    _M_group_float(const char* __grouping, size_t __grouping_size,
		   _CharT __sep, const _CharT* __p, _CharT* __new,
		   _CharT* __cs, int& __len) const
    {
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 282. What types does numpunct grouping refer to?
      // Add grouping, if necessary.
      const int __declen = __p ? __p - __cs : __len;
      _CharT* __p2 = std::__add_grouping(__new, __sep, __grouping,
					 __grouping_size,
					 __cs, __cs + __declen);

      // Tack on decimal part.
      int __newlen = __p2 - __new;
      if (__p)
	{
	  char_traits<_CharT>::copy(__p2, __p, __len - __declen);
	  __newlen += __len - __declen;
	}
      __len = __newlen;
    }

  // The following code uses snprintf (or sprintf(), when
  // _GLIBCXX_USE_C99 is not defined) to convert floating point values
  // for insertion into a stream.  An optimization would be to replace
  // them with code that works directly on a wide buffer and then use
  // __pad to do the padding.  It would be good to replace them anyway
  // to gain back the efficiency that C++ provides by knowing up front
  // the type of the values to insert.  Also, sprintf is dangerous
  // since may lead to accidental buffer overruns.  This
  // implementation follows the C++ standard fairly directly as
  // outlined in 22.2.2.2 [lib.locale.num.put]
  template<typename _CharT, typename _OutIter>
    template<typename _ValueT>
      _OutIter
      num_put<_CharT, _OutIter>::
      _M_insert_float(_OutIter __s, ios_base& __io, _CharT __fill, char __mod,
		       _ValueT __v) const
      {
	typedef __numpunct_cache<_CharT>                __cache_type;
	__use_cache<__cache_type> __uc;
	const locale& __loc = __io._M_getloc();
	const __cache_type* __lc = __uc(__loc);

	// Use default precision if out of range.
	streamsize __prec = __io.precision();
	if (__prec < static_cast<streamsize>(0))
	  __prec = static_cast<streamsize>(6);

	const int __max_digits = numeric_limits<_ValueT>::digits10;

	// [22.2.2.2.2] Stage 1, numeric conversion to character.
	int __len;
	// Long enough for the max format spec.
	char __fbuf[16];

#ifdef _GLIBCXX_USE_C99
	// First try a buffer perhaps big enough (most probably sufficient
	// for non-ios_base::fixed outputs)
	int __cs_size = __max_digits * 3;
	char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));

	__num_base::_S_format_float(__io, __fbuf, __mod);
	__len = std::__convert_from_v(__cs, __cs_size, __fbuf, __v,
				      _S_get_c_locale(), __prec);

	// If the buffer was not large enough, try again with the correct size.
	if (__len >= __cs_size)
	  {
	    __cs_size = __len + 1;
	    __cs = static_cast<char*>(__builtin_alloca(__cs_size));
	    __len = std::__convert_from_v(__cs, __cs_size, __fbuf, __v,
					  _S_get_c_locale(), __prec);
	  }
#else
	// Consider the possibility of long ios_base::fixed outputs
	const bool __fixed = __io.flags() & ios_base::fixed;
	const int __max_exp = numeric_limits<_ValueT>::max_exponent10;

	// The size of the output string is computed as follows.
	// ios_base::fixed outputs may need up to __max_exp + 1 chars
	// for the integer part + __prec chars for the fractional part
	// + 3 chars for sign, decimal point, '\0'. On the other hand,
	// for non-fixed outputs __max_digits * 2 + __prec chars are
	// largely sufficient.
	const int __cs_size = __fixed ? __max_exp + __prec + 4
	                              : __max_digits * 2 + __prec;
	char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));

	__num_base::_S_format_float(__io, __fbuf, __mod);
	__len = std::__convert_from_v(__cs, 0, __fbuf, __v,
				      _S_get_c_locale(), __prec);
#endif

	// [22.2.2.2.2] Stage 2, convert to char_type, using correct
	// numpunct.decimal_point() values for '.' and adding grouping.
	const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
	
	_CharT* __ws = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
							     * __len));
	__ctype.widen(__cs, __cs + __len, __ws);
	
	// Replace decimal point.
	const _CharT __cdec = __ctype.widen('.');
	const _CharT __dec = __lc->_M_decimal_point;
	const _CharT* __p = char_traits<_CharT>::find(__ws, __len, __cdec);
	if (__p)
	  __ws[__p - __ws] = __dec;
	
	// Add grouping, if necessary.
	// N.B. Make sure to not group things like 2e20, i.e., no decimal
	// point, scientific notation.
	if (__lc->_M_use_grouping
	    && (__p || __len < 3 || (__cs[1] <= '9' && __cs[2] <= '9'
				     && __cs[1] >= '0' && __cs[2] >= '0')))
	  {
	    // Grouping can add (almost) as many separators as the
	    // number of digits, but no more.
	    _CharT* __ws2 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
								  * __len * 2));
	    
	    streamsize __off = 0;
	    if (__cs[0] == '-' || __cs[0] == '+')
	      {
		__off = 1;
		__ws2[0] = __ws[0];
		__len -= 1;
	      }
	    
	    _M_group_float(__lc->_M_grouping, __lc->_M_grouping_size,
			   __lc->_M_thousands_sep, __p, __ws2 + __off,
			   __ws + __off, __len);
	    __len += __off;
	    
	    __ws = __ws2;
	  }

	// Pad.
	const streamsize __w = __io.width();
	if (__w > static_cast<streamsize>(__len))
	  {
	    _CharT* __ws3 = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
								  * __w));
	    _M_pad(__fill, __w, __io, __ws3, __ws, __len);
	    __ws = __ws3;
	  }
	__io.width(0);
	
	// [22.2.2.2.2] Stage 4.
	// Write resulting, fully-formatted string to output iterator.
	return std::__write(__s, __ws, __len);
      }
  
  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill, bool __v) const
    {
      const ios_base::fmtflags __flags = __io.flags();
      if ((__flags & ios_base::boolalpha) == 0)
        {
          const long __l = __v;
          __s = _M_insert_int(__s, __io, __fill, __l);
        }
      else
        {
	  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* __name = __v ? __lc->_M_truename
	                             : __lc->_M_falsename;
	  int __len = __v ? __lc->_M_truename_size
	                  : __lc->_M_falsename_size;

	  const streamsize __w = __io.width();
	  if (__w > static_cast<streamsize>(__len))
	    {
	      _CharT* __cs
		= static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT)
							* __w));
	      _M_pad(__fill, __w, __io, __cs, __name, __len);
	      __name = __cs;
	    }
	  __io.width(0);
	  __s = std::__write(__s, __name, __len);
	}
      return __s;
    }

  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill, long __v) const
    { return _M_insert_int(__s, __io, __fill, __v); }

  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill,
           unsigned long __v) const
    { return _M_insert_int(__s, __io, __fill, __v); }

#ifdef _GLIBCXX_USE_LONG_LONG
  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill, long long __v) const
    { return _M_insert_int(__s, __io, __fill, __v); }

  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill,
           unsigned long long __v) const
    { return _M_insert_int(__s, __io, __fill, __v); }
#endif

  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill, double __v) const
    { return _M_insert_float(__s, __io, __fill, char(), __v); }

  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill,
	   long double __v) const
    { return _M_insert_float(__s, __io, __fill, 'L', __v); }

  template<typename _CharT, typename _OutIter>
    _OutIter
    num_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type __fill,
           const void* __v) const
    {
      const ios_base::fmtflags __flags = __io.flags();
      const ios_base::fmtflags __fmt = ~(ios_base::basefield
					 | ios_base::uppercase
					 | ios_base::internal);
      __io.flags(__flags & __fmt | (ios_base::hex | ios_base::showbase));

      __s = _M_insert_int(__s, __io, __fill,
			  reinterpret_cast<unsigned long>(__v));
      __io.flags(__flags);
      return __s;
    }

  template<typename _CharT, typename _InIter>
    template<bool _Intl>
      _InIter
      money_get<_CharT, _InIter>::
      _M_extract(iter_type __beg, iter_type __end, ios_base& __io,
		 ios_base::iostate& __err, string& __units) const