locale_facets.tcc

gcc3.2.1源代码

		  if (__name[__pos] != __c)
		    __matches[__i3] = __matches[--__nmatches];
		}
	    }
	  else
	    break;
	}

      if (__nmatches == 1)
	{
	  // Make sure found name is completely extracted.
	  __name = __names[__matches[0]];
	  const size_t __len = __traits_type::length(__name);
	  while (__pos < __len && __beg != __end && __name[__pos] == *__beg)
	    ++__beg, ++__pos;

	  if (__len == __pos)
	    __member = __matches[0];
	  else
	    __testvalid = false;
	}
      else
	__testvalid = false;
      if (!__testvalid)
	__err |= ios_base::failbit;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    do_get_time(iter_type __beg, iter_type __end, ios_base& __io,
		ios_base::iostate& __err, tm* __tm) const
    {
      _CharT __wcs[3];
      const char* __cs = "%X";
      locale __loc = __io.getloc();
      ctype<_CharT> const& __ctype = use_facet<ctype<_CharT> >(__loc);
      __ctype.widen(__cs, __cs + 3, __wcs);
      _M_extract_via_format(__beg, __end, __io, __err, __tm, __wcs);
      if (__beg == __end)
	__err |= ios_base::eofbit;
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    do_get_date(iter_type __beg, iter_type __end, ios_base& __io,
		ios_base::iostate& __err, tm* __tm) const
    {
      _CharT __wcs[3];
      const char* __cs = "%x";
      locale __loc = __io.getloc();
      ctype<_CharT> const& __ctype = use_facet<ctype<_CharT> >(__loc);
      __ctype.widen(__cs, __cs + 3, __wcs);
      _M_extract_via_format(__beg, __end, __io, __err, __tm, __wcs);
      if (__beg == __end)
	__err |= ios_base::eofbit;
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    do_get_weekday(iter_type __beg, iter_type __end, ios_base& __io, 
		   ios_base::iostate& __err, tm* __tm) const
    {
      typedef char_traits<_CharT> 		__traits_type;
      locale __loc = __io.getloc();
      __timepunct<_CharT> const& __tp = use_facet<__timepunct<_CharT> >(__loc);
      const char_type*  __days[7];
      __tp._M_days_abbreviated(__days);
      int __tmpwday;
      _M_extract_name(__beg, __end, __tmpwday, __days, 7, __err);

      // Check to see if non-abbreviated name exists, and extract.
      // NB: Assumes both _M_days and _M_days_abbreviated organized in
      // exact same order, first to last, such that the resulting
      // __days array with the same index points to a day, and that
      // day's abbreviated form.
      // NB: Also assumes that an abbreviated name is a subset of the name. 
      if (!__err)
	{
	  size_t __pos = __traits_type::length(__days[__tmpwday]);
	  __tp._M_days(__days);
	  const char_type* __name = __days[__tmpwday];
	  if (__name[__pos] == *__beg)
	    {
	      // Extract the rest of it.
	      const size_t __len = __traits_type::length(__name);
	      while (__pos < __len && __beg != __end 
		     && __name[__pos] == *__beg)
		++__beg, ++__pos;
	      if (__len != __pos)
		__err |= ios_base::failbit;
	    }
	  if (!__err)
	    __tm->tm_wday = __tmpwday;
	}
      if (__beg == __end)
	__err |= ios_base::eofbit;
      return __beg;
     }

  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    do_get_monthname(iter_type __beg, iter_type __end,
                     ios_base& __io, ios_base::iostate& __err, tm* __tm) const
    {
      typedef char_traits<_CharT> 		__traits_type;
      locale __loc = __io.getloc();
      __timepunct<_CharT> const& __tp = use_facet<__timepunct<_CharT> >(__loc);
      const char_type*  __months[12];
      __tp._M_months_abbreviated(__months);
      int __tmpmon;
      _M_extract_name(__beg, __end, __tmpmon, __months, 12, __err);

      // Check to see if non-abbreviated name exists, and extract.
      // NB: Assumes both _M_months and _M_months_abbreviated organized in
      // exact same order, first to last, such that the resulting
      // __months array with the same index points to a month, and that
      // month's abbreviated form.
      // NB: Also assumes that an abbreviated name is a subset of the name. 
      if (!__err)
	{
	  size_t __pos = __traits_type::length(__months[__tmpmon]);
	  __tp._M_months(__months);
	  const char_type* __name = __months[__tmpmon];
	  if (__name[__pos] == *__beg)
	    {
	      // Extract the rest of it.
	      const size_t __len = __traits_type::length(__name);
	      while (__pos < __len && __beg != __end 
		     && __name[__pos] == *__beg)
		++__beg, ++__pos;
	      if (__len != __pos)
		__err |= ios_base::failbit;
	    }
	  if (!__err)
	    __tm->tm_mon = __tmpmon;
	}
 
      if (__beg == __end)
	__err |= ios_base::eofbit;
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    do_get_year(iter_type __beg, iter_type __end, ios_base& __io, 
		ios_base::iostate& __err, tm* __tm) const
    {
      locale __loc = __io.getloc();
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc); 

      char_type __c = *__beg;
      size_t __i = 0;
      string __digits;
      while (__i < 4 && __beg != __end && __ctype.is(ctype_base::digit, __c))
	{
	  __digits += __ctype.narrow(__c, 0);
	  __c = *(++__beg);
	  ++__i;
	}
      if (__i == 2 || __i == 4)
	{
	  long __l;
	  __convert_to_v(__digits.c_str(), __l, __err, _S_c_locale);
	  if (!(__err & ios_base::failbit) && __l <= INT_MAX)
	    {
	      __l = __i == 2 ? __l : __l - 1900; 
	      __tm->tm_year = static_cast<int>(__l);
	    }
	}
      else
	__err |= ios_base::failbit;
      if (__beg == __end)
	__err |= ios_base::eofbit;
      return __beg;
    }

  template<typename _CharT, typename _OutIter>
    _OutIter
    time_put<_CharT, _OutIter>::
    put(iter_type __s, ios_base& __io, char_type, const tm* __tm, 
	const _CharT* __beg, const _CharT* __end) const
    {
      locale __loc = __io.getloc();
      ctype<_CharT> const& __ctype = use_facet<ctype<_CharT> >(__loc);
      while (__beg != __end)
	{
	  char __c = __ctype.narrow(*__beg, 0);
	  ++__beg;
	  if (__c == '%')
	    {
	      char __format;
	      char __mod = 0;
	      size_t __len = 1; 
	      __c = __ctype.narrow(*__beg, 0);
	      ++__beg;
	      if (__c == 'E' || __c == 'O')
		{
		  __mod = __c;
		  __format = __ctype.narrow(*__beg, 0);
		  ++__beg;
		}
	      else
		__format = __c;
	      __s = this->do_put(__s, __io, char_type(), __tm, __format, 
				 __mod);
	    }
	  else
	    {
	      *__s = __c;
	      ++__s;
	    }
	}
      return __s;
    }

  template<typename _CharT, typename _OutIter>
    _OutIter
    time_put<_CharT, _OutIter>::
    do_put(iter_type __s, ios_base& __io, char_type, const tm* __tm, 
	   char __format, char __mod) const
    { 
      locale __loc = __io.getloc();
      ctype<_CharT> const& __ctype = use_facet<ctype<_CharT> >(__loc);
      __timepunct<_CharT> const& __tp = use_facet<__timepunct<_CharT> >(__loc);

      // NB: This size is arbitrary. Should this be a data member,
      // initialized at construction?
      const size_t __maxlen = 64;
      char_type* __res =
	static_cast<char_type*>(__builtin_alloca(sizeof(char_type) * __maxlen));

      // NB: In IEE 1003.1-200x, and perhaps other locale models, it
      // is possible that the format character will be longer than one
      // character. Possibilities include 'E' or 'O' followed by a
      // format character: if __mod is not the default argument, assume
      // it's a valid modifier.
      char_type __fmt[4];
      __fmt[0] = __ctype.widen('%'); 
      if (!__mod)
	{
	  __fmt[1] = __format;
	  __fmt[2] = char_type();
	}
      else
	{
	  __fmt[1] = __mod;
	  __fmt[2] = __format;
	  __fmt[3] = char_type();
	}

      __tp._M_put(__res, __maxlen, __fmt, __tm);

      // Write resulting, fully-formatted string to output iterator.
      size_t __len = char_traits<char_type>::length(__res);
      for (size_t __i = 0; __i < __len; ++__i, ++__s)
	*__s = __res[__i];
      return __s;
    }


  // Generic version does nothing.
  template<typename _CharT>
    int
    collate<_CharT>::_M_compare(const _CharT*, const _CharT*) const
    { return 0; }

  // Generic version does nothing.
  template<typename _CharT>
    size_t
    collate<_CharT>::_M_transform(_CharT*, const _CharT*, size_t) const
    { return 0; }

  template<typename _CharT>
    int
    collate<_CharT>::
    do_compare(const _CharT* __lo1, const _CharT* __hi1, 
	       const _CharT* __lo2, const _CharT* __hi2) const
    { 
      const string_type __one(__lo1, __hi1);
      const string_type __two(__lo2, __hi2);
      return _M_compare(__one.c_str(), __two.c_str());
    }

 template<typename _CharT>
    typename collate<_CharT>::string_type
    collate<_CharT>::
    do_transform(const _CharT* __lo, const _CharT* __hi) const
    {
      size_t __len = (__hi - __lo) * 2;
      // First try a buffer perhaps big enough.
      _CharT* __c =
	static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __len));
      size_t __res = _M_transform(__c, __lo, __len);
      // If the buffer was not large enough, try again with the correct size.
      if (__res >= __len)
	{
	  __c =
	    static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * (__res + 1)));
	  _M_transform(__c, __lo, __res + 1);
	}
      return string_type(__c);
    }

 template<typename _CharT>
    long
    collate<_CharT>::
    do_hash(const _CharT* __lo, const _CharT* __hi) const
    { 
      unsigned long __val = 0;
      for (; __lo < __hi; ++__lo)
	__val = *__lo + ((__val << 7) | 
		       (__val >> (numeric_limits<unsigned long>::digits - 7)));
      return static_cast<long>(__val);
    }

  // Convert string to numeric value of type _Tv and store results.  
  // NB: This is specialized for all required types, there is no
  // generic definition.
  template<typename _Tv>
    void
    __convert_to_v(const char* __in, _Tv& __out, ios_base::iostate& __err, 
		   const __c_locale& __cloc, int __base = 10);

  // Convert numeric value of type _Tv to string and return length of string.
  // If snprintf is available use it, otherwise fall back to the unsafe sprintf
  // which, in general, can be dangerous and should be avoided.
  template<typename _Tv>
    int
    __convert_from_v(char* __out, const int __size, const char* __fmt,
		     _Tv __v, const __c_locale&, int __prec = -1);

  // Construct correctly padded string, as per 22.2.2.2.2
  // Assumes 
  // __newlen > __oldlen
  // __news is allocated for __newlen size
  // Used by both num_put and ostream inserters: if __num,
  // internal-adjusted objects are padded according to the rules below
  // concerning 0[xX] and +-, otherwise, exactly as right-adjusted
  // ones are.

  // NB: Of the two parameters, _CharT can be deduced from the
  // function arguments. The other (_Traits) has to be explicitly specified.
  template<typename _CharT, typename _Traits>
    struct __pad
    {
      static void
      _S_pad(ios_base& __io, _CharT __fill, _CharT* __news, 
	     const _CharT* __olds, const streamsize __newlen, 
	     const streamsize __oldlen, const bool __num);
    };

  template<typename _CharT, typename _Traits>
    void 
    __pad<_CharT, _Traits>::_S_pad(ios_base& __io, _CharT __fill, 
				   _CharT* __news, const _CharT* __olds, 
				   const streamsize __newlen, 
				   const streamsize __oldlen, const bool __num)
    {
      size_t __plen = static_cast<size_t>(__newlen - __oldlen);
      _CharT* __pads = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __plen));
      _Traits::assign(__pads, __plen, __fill); 

      _CharT* __beg;
      _CharT* __end;
      size_t __mod = 0;
      size_t __beglen; //either __plen or __oldlen
      ios_base::fmtflags __adjust = __io.flags() & ios_base::adjustfield;

      if (__adjust == ios_base::left)
	{
	  // Padding last.
	  __beg = const_cast<_CharT*>(__olds);
	  __beglen = __oldlen;
	  __end = __pads;
	}
      else if (__adjust == ios_base::internal && __num)
	{
	  // Pad after the sign, if there is one.
	  // Pad after 0[xX], if there is one.
	  // Who came up with these rules, anyway? Jeeze.
          locale __loc = __io.getloc();
	  const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc); 
	  const _CharT __minus = __ctype.widen('-');
	  const _CharT __plus = __ctype.widen('+');
	  bool __testsign = _Traits::eq(__olds[0], __minus)
	    		    || _Traits::eq(__olds[0], __plus);

	  bool __testhex = _Traits::eq(__ctype.widen('0'), __olds[0]) 
	    		   && (_Traits::eq(__ctype.widen('x'), __olds[1]) 
			       || _Traits::eq(__ctype.widen('X'), __olds[1]));
	  if (__testhex)
	    {
	      __news[0] = __olds[0]; 
	      __news[1] = __olds[1];
	      __mod += 2;
	      __news += 2;
	      __beg = __pads;
	      __beglen = __plen;
	      __end = const_cast<_CharT*>(__olds + __mod);
	    }
	  else if (__testsign)
	    {