locale_facets_nonio.tcc

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// Locale support -*- C++ -*-

// Copyright (C) 2007-2014 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/locale_facets_nonio.tcc
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{locale}
 */

#ifndef _LOCALE_FACETS_NONIO_TCC
#define _LOCALE_FACETS_NONIO_TCC 1

#pragma GCC system_header

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  template<typename _CharT, bool _Intl>
    struct __use_cache<__moneypunct_cache<_CharT, _Intl> >
    {
      const __moneypunct_cache<_CharT, _Intl>*
      operator() (const locale& __loc) const
      {
    const size_t __i = moneypunct<_CharT, _Intl>::id._M_id();
    const locale::facet** __caches = __loc._M_impl->_M_caches;
    if (!__caches[__i])
      {
        __moneypunct_cache<_CharT, _Intl>* __tmp = 0;
        __try
          {
        __tmp = new __moneypunct_cache<_CharT, _Intl>;
        __tmp->_M_cache(__loc);
          }
        __catch(...)
          {
        delete __tmp;
        __throw_exception_again;
          }
        __loc._M_impl->_M_install_cache(__tmp, __i);
      }
    return static_cast<
      const __moneypunct_cache<_CharT, _Intl>*>(__caches[__i]);
      }
    };

  template<typename _CharT, bool _Intl>
    void
    __moneypunct_cache<_CharT, _Intl>::_M_cache(const locale& __loc)
    {
      _M_allocated = true;

      const moneypunct<_CharT, _Intl>& __mp =
    use_facet<moneypunct<_CharT, _Intl> >(__loc);

      _M_decimal_point = __mp.decimal_point();
      _M_thousands_sep = __mp.thousands_sep();
      _M_frac_digits = __mp.frac_digits();

      char* __grouping = 0;
      _CharT* __curr_symbol = 0;
      _CharT* __positive_sign = 0;
      _CharT* __negative_sign = 0;     
      __try
    {
      _M_grouping_size = __mp.grouping().size();
      __grouping = new char[_M_grouping_size];
      __mp.grouping().copy(__grouping, _M_grouping_size);
      _M_grouping = __grouping;
      _M_use_grouping = (_M_grouping_size
                 && static_cast<signed char>(_M_grouping[0]) > 0
                 && (_M_grouping[0]
                 != __gnu_cxx::__numeric_traits<char>::__max));

      _M_curr_symbol_size = __mp.curr_symbol().size();
      __curr_symbol = new _CharT[_M_curr_symbol_size];
      __mp.curr_symbol().copy(__curr_symbol, _M_curr_symbol_size);
      _M_curr_symbol = __curr_symbol;

      _M_positive_sign_size = __mp.positive_sign().size();
      __positive_sign = new _CharT[_M_positive_sign_size];
      __mp.positive_sign().copy(__positive_sign, _M_positive_sign_size);
      _M_positive_sign = __positive_sign;

      _M_negative_sign_size = __mp.negative_sign().size();
      __negative_sign = new _CharT[_M_negative_sign_size];
      __mp.negative_sign().copy(__negative_sign, _M_negative_sign_size);
      _M_negative_sign = __negative_sign;

      _M_pos_format = __mp.pos_format();
      _M_neg_format = __mp.neg_format();

      const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__loc);
      __ct.widen(money_base::_S_atoms,
             money_base::_S_atoms + money_base::_S_end, _M_atoms);
    }
      __catch(...)
    {
      delete [] __grouping;
      delete [] __curr_symbol;
      delete [] __positive_sign;
      delete [] __negative_sign;
      __throw_exception_again;
    }
    }

_GLIBCXX_BEGIN_NAMESPACE_LDBL

  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
      {
    typedef char_traits<_CharT>           __traits_type;
    typedef typename string_type::size_type           size_type;    
    typedef money_base::part              part;
    typedef __moneypunct_cache<_CharT, _Intl>         __cache_type;
    
    const locale& __loc = __io._M_getloc();
    const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);

    __use_cache<__cache_type> __uc;
    const __cache_type* __lc = __uc(__loc);
    const char_type* __lit = __lc->_M_atoms;

    // Deduced sign.
    bool __negative = false;
    // Sign size.
    size_type __sign_size = 0;
    // True if sign is mandatory.
    const bool __mandatory_sign = (__lc->_M_positive_sign_size
                       && __lc->_M_negative_sign_size);
    // String of grouping info from thousands_sep plucked from __units.
    string __grouping_tmp;
    if (__lc->_M_use_grouping)
      __grouping_tmp.reserve(32);
    // Last position before the decimal point.
    int __last_pos = 0;
    // Separator positions, then, possibly, fractional digits.
    int __n = 0;
    // If input iterator is in a valid state.
    bool __testvalid = true;
    // Flag marking when a decimal point is found.
    bool __testdecfound = false;

    // The tentative returned string is stored here.
    string __res;
    __res.reserve(32);

    const char_type* __lit_zero = __lit + money_base::_S_zero;
    const money_base::pattern __p = __lc->_M_neg_format;
    for (int __i = 0; __i < 4 && __testvalid; ++__i)
      {
        const part __which = static_cast<part>(__p.field[__i]);
        switch (__which)
          {
          case money_base::symbol:
        // According to 22.2.6.1.2, p2, symbol is required
        // if (__io.flags() & ios_base::showbase), otherwise
        // is optional and consumed only if other characters
        // are needed to complete the format.
        if (__io.flags() & ios_base::showbase || __sign_size > 1
            || __i == 0
            || (__i == 1 && (__mandatory_sign
                     || (static_cast<part>(__p.field[0])
                     == money_base::sign)
                     || (static_cast<part>(__p.field[2])
                     == money_base::space)))
            || (__i == 2 && ((static_cast<part>(__p.field[3])
                      == money_base::value)
                     || (__mandatory_sign
                     && (static_cast<part>(__p.field[3])
                         == money_base::sign)))))
          {
            const size_type __len = __lc->_M_curr_symbol_size;
            size_type __j = 0;
            for (; __beg != __end && __j < __len
               && *__beg == __lc->_M_curr_symbol[__j];
             ++__beg, ++__j);
            if (__j != __len
            && (__j || __io.flags() & ios_base::showbase))
              __testvalid = false;
          }
        break;
          case money_base::sign:
        // Sign might not exist, or be more than one character long.
        if (__lc->_M_positive_sign_size && __beg != __end
            && *__beg == __lc->_M_positive_sign[0])
          {
            __sign_size = __lc->_M_positive_sign_size;
            ++__beg;
          }
        else if (__lc->_M_negative_sign_size && __beg != __end
             && *__beg == __lc->_M_negative_sign[0])
          {
            __negative = true;
            __sign_size = __lc->_M_negative_sign_size;
            ++__beg;
          }
        else if (__lc->_M_positive_sign_size
             && !__lc->_M_negative_sign_size)
          // "... if no sign is detected, the result is given the sign
          // that corresponds to the source of the empty string"
          __negative = true;
        else if (__mandatory_sign)
          __testvalid = false;
        break;
          case money_base::value:
        // Extract digits, remove and stash away the
        // grouping of found thousands separators.
        for (; __beg != __end; ++__beg)
          {
            const char_type __c = *__beg;
            const char_type* __q = __traits_type::find(__lit_zero, 
                                   10, __c);
            if (__q != 0)
              {
            __res += money_base::_S_atoms[__q - __lit];
            ++__n;
              }
            else if (__c == __lc->_M_decimal_point 
                 && !__testdecfound)
              {
            if (__lc->_M_frac_digits <= 0)
              break;

            __last_pos = __n;
            __n = 0;
            __testdecfound = true;
              }
            else if (__lc->_M_use_grouping
                 && __c == __lc->_M_thousands_sep
                 && !__testdecfound)
              {
            if (__n)
              {
                // Mark position for later analysis.
                __grouping_tmp += static_cast<char>(__n);
                __n = 0;
              }
            else
              {
                __testvalid = false;
                break;
              }
              }
            else
              break;
          }
        if (__res.empty())
          __testvalid = false;
        break;
          case money_base::space:
        // At least one space is required.
        if (__beg != __end && __ctype.is(ctype_base::space, *__beg))
          ++__beg;
        else
          __testvalid = false;
          case money_base::none:
        // Only if not at the end of the pattern.
        if (__i != 3)
          for (; __beg != __end
             && __ctype.is(ctype_base::space, *__beg); ++__beg);
        break;
          }
      }

    // Need to get the rest of the sign characters, if they exist.
    if (__sign_size > 1 && __testvalid)
      {
        const char_type* __sign = __negative ? __lc->_M_negative_sign
                                             : __lc->_M_positive_sign;
        size_type __i = 1;
        for (; __beg != __end && __i < __sign_size
           && *__beg == __sign[__i]; ++__beg, ++__i);
        
        if (__i != __sign_size)
          __testvalid = false;
      }

    if (__testvalid)
      {
        // Strip leading zeros.
        if (__res.size() > 1)
          {
        const size_type __first = __res.find_first_not_of('0');
        const bool __only_zeros = __first == string::npos;
        if (__first)
          __res.erase(0, __only_zeros ? __res.size() - 1 : __first);
          }

        // 22.2.6.1.2, p4
        if (__negative && __res[0] != '0')
          __res.insert(__res.begin(), '-');
        
        // Test for grouping fidelity.
        if (__grouping_tmp.size())
          {
        // Add the ending grouping.
        __grouping_tmp += static_cast<char>(__testdecfound ? __last_pos
                                           : __n);
        if (!std::__verify_grouping(__lc->_M_grouping,
                        __lc->_M_grouping_size,
                        __grouping_tmp))
          __err |= ios_base::failbit;
          }
        
        // Iff not enough digits were supplied after the decimal-point.
        if (__testdecfound && __n != __lc->_M_frac_digits)
          __testvalid = false;
      }

    // Iff valid sequence is not recognized.
    if (!__testvalid)
      __err |= ios_base::failbit;
    else
      __units.swap(__res);
    
    // Iff no more characters are available.
    if (__beg == __end)
      __err |= ios_base::eofbit;
    return __beg;
      }

#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
  template<typename _CharT, typename _InIter>
    _InIter
    money_get<_CharT, _InIter>::
    __do_get(iter_type __beg, iter_type __end, bool __intl, ios_base& __io,
         ios_base::iostate& __err, double& __units) const
    {
      string __str;
      __beg = __intl ? _M_extract<true>(__beg, __end, __io, __err, __str)
                     : _M_extract<false>(__beg, __end, __io, __err, __str);
      std::__convert_to_v(__str.c_str(), __units, __err, _S_get_c_locale());
      return __beg;
    }
#endif

  template<typename _CharT, typename _InIter>
    _InIter
    money_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, bool __intl, ios_base& __io,
       ios_base::iostate& __err, long double& __units) const
    {
      string __str;
      __beg = __intl ? _M_extract<true>(__beg, __end, __io, __err, __str)
                 : _M_extract<false>(__beg, __end, __io, __err, __str);
      std::__convert_to_v(__str.c_str(), __units, __err, _S_get_c_locale());
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    money_get<_CharT, _InIter>::
    do_get(iter_type __beg, iter_type __end, bool __intl, ios_base& __io,
       ios_base::iostate& __err, string_type& __digits) const
    {
      typedef typename string::size_type                  size_type;

      const locale& __loc = __io._M_getloc();
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);

      string __str;
      __beg = __intl ? _M_extract<true>(__beg, __end, __io, __err, __str)
                 : _M_extract<false>(__beg, __end, __io, __err, __str);
      const size_type __len = __str.size();
      if (__len)
    {
      __digits.resize(__len);
      __ctype.widen(__str.data(), __str.data() + __len, &__digits[0]);
    }
      return __beg;
    }

  template<typename _CharT, typename _OutIter>
    template<bool _Intl>
      _OutIter
      money_put<_CharT, _OutIter>::
      _M_insert(iter_type __s, ios_base& __io, char_type __fill,
        const string_type& __digits) const
      {
    typedef typename string_type::size_type           size_type;
    typedef money_base::part                          part;
    typedef __moneypunct_cache<_CharT, _Intl>         __cache_type;
      
    const locale& __loc = __io._M_getloc();
    const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);

    __use_cache<__cache_type> __uc;
    const __cache_type* __lc = __uc(__loc);
    const char_type* __lit = __lc->_M_atoms;

    // Determine if negative or positive formats are to be used, and
    // discard leading negative_sign if it is present.
    const char_type* __beg = __digits.data();

    money_base::pattern __p;
    const char_type* __sign;
    size_type __sign_size;
    if (!(*__beg == __lit[money_base::_S_minus]))
      {
        __p = __lc->_M_pos_format;
        __sign = __lc->_M_positive_sign;
        __sign_size = __lc->_M_positive_sign_size;
      }
    else
      {
        __p = __lc->_M_neg_format;
        __sign = __lc->_M_negative_sign;
        __sign_size = __lc->_M_negative_sign_size;
        if (__digits.size())
          ++__beg;
      }
       
    // Look for valid numbers in the ctype facet within input digits.
    size_type __len = __ctype.scan_not(ctype_base::digit, __beg,
                       __beg + __digits.size()) - __beg;
    if (__len)
      {
        // Assume valid input, and attempt to format.
        // Break down input numbers into base components, as follows:
        //   final_value = grouped units + (decimal point) + (digits)
        string_type __value;
        __value.reserve(2 * __len);

        // Add thousands separators to non-decimal digits, per
        // grouping rules.
        long __paddec = __len - __lc->_M_frac_digits;
        if (__paddec > 0)
          {
        if (__lc->_M_frac_digits < 0)
          __paddec = __len;
        if (__lc->_M_grouping_size)
          {
            __value.assign(2 * __paddec, char_type());
            _CharT* __vend = 
              std::__add_grouping(&__value[0], __lc->_M_thousands_sep,
                      __lc->_M_grouping,
                      __lc->_M_grouping_size,
                      __beg, __beg + __paddec);
            __value.erase(__vend - &__value[0]);
          }
        else
          __value.assign(__beg, __paddec);
          }

        // Deal with decimal point, decimal digits.
        if (__lc->_M_frac_digits > 0)
          {
        __value += __lc->_M_decimal_point;
        if (__paddec >= 0)
          __value.append(__beg + __paddec, __lc->_M_frac_digits);
        else
          {
            // Have to pad zeros in the decimal position.
            __value.append(-__paddec, __lit[money_base::_S_zero]);
            __value.append(__beg, __len);
          }
          }
  
        // Calculate length of resulting string.
        const ios_base::fmtflags __f = __io.flags() 
                                       & ios_base::adjustfield;
        __len = __value.size() + __sign_size;
        __len += ((__io.flags() & ios_base::showbase)
              ? __lc->_M_curr_symbol_size : 0);

        string_type __res;
        __res.reserve(2 * __len);
        
        const size_type __width = static_cast<size_type>(__io.width());  
        const bool __testipad = (__f == ios_base::internal
                     && __len < __width);
        // Fit formatted digits into the required pattern.
        for (int __i = 0; __i < 4; ++__i)
          {
        const part __which = static_cast<part>(__p.field[__i]);
        switch (__which)
          {
          case money_base::symbol:
            if (__io.flags() & ios_base::showbase)
              __res.append(__lc->_M_curr_symbol,
                   __lc->_M_curr_symbol_size);
            break;
          case money_base::sign:
            // Sign might not exist, or be more than one
            // character long. In that case, add in the rest
            // below.
            if (__sign_size)
              __res += __sign[0];
            break;
          case money_base::value:
            __res += __value;
            break;
          case money_base::space:
            // At least one space is required, but if internal
            // formatting is required, an arbitrary number of
            // fill spaces will be necessary.
            if (__testipad)
              __res.append(__width - __len, __fill);
            else
              __res += __fill;
            break;
          case money_base::none:
            if (__testipad)
              __res.append(__width - __len, __fill);
            break;
          }
          }
        
        // Special case of multi-part sign parts.
        if (__sign_size > 1)
          __res.append(__sign + 1, __sign_size - 1);
        
        // Pad, if still necessary.
        __len = __res.size();
        if (__width > __len)
          {
        if (__f == ios_base::left)
          // After.
          __res.append(__width - __len, __fill);
        else
          // Before.
          __res.insert(0, __width - __len, __fill);
        __len = __width;
          }
        
        // Write resulting, fully-formatted string to output iterator.
        __s = std::__write(__s, __res.data(), __len);
      }
    __io.width(0);
    return __s;    
      }

#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
  template<typename _CharT, typename _OutIter>
    _OutIter
    money_put<_CharT, _OutIter>::
    __do_put(iter_type __s, bool __intl, ios_base& __io, char_type __fill,
         double __units) const
    { return this->do_put(__s, __intl, __io, __fill, (long double) __units); }
#endif

  template<typename _CharT, typename _OutIter>
    _OutIter
    money_put<_CharT, _OutIter>::
    do_put(iter_type __s, bool __intl, ios_base& __io, char_type __fill,
       long double __units) const
    {
      const locale __loc = __io.getloc();
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
#ifdef _GLIBCXX_USE_C99
      // First try a buffer perhaps big enough.
      int __cs_size = 64;
      char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 328. Bad sprintf format modifier in money_put<>::do_put()
      int __len = std::__convert_from_v(_S_get_c_locale(), __cs, __cs_size,
                    "%.*Lf", 0, __units);
      // 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(_S_get_c_locale(), __cs, __cs_size,
                    "%.*Lf", 0, __units);
    }
#else
      // max_exponent10 + 1 for the integer part, + 2 for sign and '\0'.
      const int __cs_size =
    __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 3;
      char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
      int __len = std::__convert_from_v(_S_get_c_locale(), __cs, 0, "%.*Lf", 
                    0, __units);
#endif
      string_type __digits(__len, char_type());
      __ctype.widen(__cs, __cs + __len, &__digits[0]);
      return __intl ? _M_insert<true>(__s, __io, __fill, __digits)
                : _M_insert<false>(__s, __io, __fill, __digits);
    }

  template<typename _CharT, typename _OutIter>
    _OutIter
    money_put<_CharT, _OutIter>::
    do_put(iter_type __s, bool __intl, ios_base& __io, char_type __fill,
       const string_type& __digits) const
    { return __intl ? _M_insert<true>(__s, __io, __fill, __digits)
                : _M_insert<false>(__s, __io, __fill, __digits); }

_GLIBCXX_END_NAMESPACE_LDBL

  // NB: Not especially useful. Without an ios_base object or some
  // kind of locale reference, we are left clawing at the air where
  // the side of the mountain used to be...
  template<typename _CharT, typename _InIter>
    time_base::dateorder
    time_get<_CharT, _InIter>::do_date_order() const
    { return time_base::no_order; }

  // Expand a strftime format string and parse it.  E.g., do_get_date() may
  // pass %m/%d/%Y => extracted characters.
  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    _M_extract_via_format(iter_type __beg, iter_type __end, ios_base& __io,
              ios_base::iostate& __err, tm* __tm,
              const _CharT* __format) const
    {
      const locale& __loc = __io._M_getloc();
      const __timepunct<_CharT>& __tp = use_facet<__timepunct<_CharT> >(__loc);
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
      const size_t __len = char_traits<_CharT>::length(__format);

      ios_base::iostate __tmperr = ios_base::goodbit;
      size_t __i = 0;
      for (; __beg != __end && __i < __len && !__tmperr; ++__i)
    {
      if (__ctype.narrow(__format[__i], 0) == '%')
        {
          // Verify valid formatting code, attempt to extract.
          char __c = __ctype.narrow(__format[++__i], 0);
          int __mem = 0;
          if (__c == 'E' || __c == 'O')
        __c = __ctype.narrow(__format[++__i], 0);
          switch (__c)
        {
          const char* __cs;
          _CharT __wcs[10];
        case 'a':
          // Abbreviated weekday name [tm_wday]
          const char_type*  __days1[7];
          __tp._M_days_abbreviated(__days1);
          __beg = _M_extract_name(__beg, __end, __tm->tm_wday, __days1,
                      7, __io, __tmperr);
          break;
        case 'A':
          // Weekday name [tm_wday].
          const char_type*  __days2[7];
          __tp._M_days(__days2);
          __beg = _M_extract_name(__beg, __end, __tm->tm_wday, __days2,
                      7, __io, __tmperr);
          break;
        case 'h':
        case 'b':
          // Abbreviated month name [tm_mon]
          const char_type*  __months1[12];
          __tp._M_months_abbreviated(__months1);
          __beg = _M_extract_name(__beg, __end, __tm->tm_mon, 
                      __months1, 12, __io, __tmperr);
          break;
        case 'B':
          // Month name [tm_mon].
          const char_type*  __months2[12];
          __tp._M_months(__months2);
          __beg = _M_extract_name(__beg, __end, __tm->tm_mon, 
                      __months2, 12, __io, __tmperr);
          break;
        case 'c':
          // Default time and date representation.
          const char_type*  __dt[2];
          __tp._M_date_time_formats(__dt);
          __beg = _M_extract_via_format(__beg, __end, __io, __tmperr, 
                        __tm, __dt[0]);
          break;
        case 'd':
          // Day [01, 31]. [tm_mday]
          __beg = _M_extract_num(__beg, __end, __tm->tm_mday, 1, 31, 2,
                     __io, __tmperr);
          break;
        case 'e':
          // Day [1, 31], with single digits preceded by
          // space. [tm_mday]
          if (__ctype.is(ctype_base::space, *__beg))
            __beg = _M_extract_num(++__beg, __end, __tm->tm_mday, 1, 9,
                       1, __io, __tmperr);
          else
            __beg = _M_extract_num(__beg, __end, __tm->tm_mday, 10, 31,
                       2, __io, __tmperr);
          break;
        case 'D':
          // Equivalent to %m/%d/%y.[tm_mon, tm_mday, tm_year]
          __cs = "%m/%d/%y";
          __ctype.widen(__cs, __cs + 9, __wcs);
          __beg = _M_extract_via_format(__beg, __end, __io, __tmperr, 
                        __tm, __wcs);
          break;
        case 'H':
          // Hour [00, 23]. [tm_hour]
          __beg = _M_extract_num(__beg, __end, __tm->tm_hour, 0, 23, 2,
                     __io, __tmperr);
          break;
        case 'I':
          // Hour [01, 12]. [tm_hour]
          __beg = _M_extract_num(__beg, __end, __tm->tm_hour, 1, 12, 2,
                     __io, __tmperr);
          break;
        case 'm':
          // Month [01, 12]. [tm_mon]
          __beg = _M_extract_num(__beg, __end, __mem, 1, 12, 2, 
                     __io, __tmperr);
          if (!__tmperr)
            __tm->tm_mon = __mem - 1;
          break;
        case 'M':
          // Minute [00, 59]. [tm_min]
          __beg = _M_extract_num(__beg, __end, __tm->tm_min, 0, 59, 2,
                     __io, __tmperr);
          break;
        case 'n':
          if (__ctype.narrow(*__beg, 0) == '\n')
            ++__beg;
          else
            __tmperr |= ios_base::failbit;
          break;
        case 'R':
          // Equivalent to (%H:%M).
          __cs = "%H:%M";
          __ctype.widen(__cs, __cs + 6, __wcs);
          __beg = _M_extract_via_format(__beg, __end, __io, __tmperr, 
                        __tm, __wcs);
          break;
        case 'S':
          // Seconds. [tm_sec]
          // [00, 60] in C99 (one leap-second), [00, 61] in C89.
#ifdef _GLIBCXX_USE_C99
          __beg = _M_extract_num(__beg, __end, __tm->tm_sec, 0, 60, 2,
#else
          __beg = _M_extract_num(__beg, __end, __tm->tm_sec, 0, 61, 2,
#endif
                     __io, __tmperr);
          break;
        case 't':
          if (__ctype.narrow(*__beg, 0) == '\t')
            ++__beg;
          else
            __tmperr |= ios_base::failbit;
          break;
        case 'T':
          // Equivalent to (%H:%M:%S).
          __cs = "%H:%M:%S";
          __ctype.widen(__cs, __cs + 9, __wcs);
          __beg = _M_extract_via_format(__beg, __end, __io, __tmperr, 
                        __tm, __wcs);
          break;
        case 'x':
          // Locale's date.
          const char_type*  __dates[2];
          __tp._M_date_formats(__dates);
          __beg = _M_extract_via_format(__beg, __end, __io, __tmperr, 
                        __tm, __dates[0]);
          break;
        case 'X':
          // Locale's time.
          const char_type*  __times[2];
          __tp._M_time_formats(__times);
          __beg = _M_extract_via_format(__beg, __end, __io, __tmperr, 
                        __tm, __times[0]);
          break;
        case 'y':
        case 'C': // C99
          // Two digit year.
        case 'Y':
          // Year [1900).
          // NB: We parse either two digits, implicitly years since
          // 1900, or 4 digits, full year.  In both cases we can 
          // reconstruct [tm_year].  See also libstdc++/26701.
          __beg = _M_extract_num(__beg, __end, __mem, 0, 9999, 4,
                     __io, __tmperr);
          if (!__tmperr)
            __tm->tm_year = __mem < 0 ? __mem + 100 : __mem - 1900;
          break;
        case 'Z':
          // Timezone info.
          if (__ctype.is(ctype_base::upper, *__beg))
            {
              int __tmp;
              __beg = _M_extract_name(__beg, __end, __tmp,
                       __timepunct_cache<_CharT>::_S_timezones,
                          14, __io, __tmperr);

              // GMT requires special effort.
              if (__beg != __end && !__tmperr && __tmp == 0
              && (*__beg == __ctype.widen('-')
                  || *__beg == __ctype.widen('+')))
            {
              __beg = _M_extract_num(__beg, __end, __tmp, 0, 23, 2,
                         __io, __tmperr);
              __beg = _M_extract_num(__beg, __end, __tmp, 0, 59, 2,
                         __io, __tmperr);
            }
            }
          else
            __tmperr |= ios_base::failbit;
          break;
        default:
          // Not recognized.
          __tmperr |= ios_base::failbit;
        }
        }
      else
        {
          // Verify format and input match, extract and discard.
          if (__format[__i] == *__beg)
        ++__beg;
          else
        __tmperr |= ios_base::failbit;
        }
    }

      if (__tmperr || __i != __len)
    __err |= ios_base::failbit;
  
      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    _M_extract_num(iter_type __beg, iter_type __end, int& __member,
           int __min, int __max, size_t __len,
           ios_base& __io, ios_base::iostate& __err) const
    {
      const locale& __loc = __io._M_getloc();
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);

      // As-is works for __len = 1, 2, 4, the values actually used.
      int __mult = __len == 2 ? 10 : (__len == 4 ? 1000 : 1);

      ++__min;
      size_t __i = 0;
      int __value = 0;
      for (; __beg != __end && __i < __len; ++__beg, ++__i)
    {
      const char __c = __ctype.narrow(*__beg, '*');
      if (__c >= '0' && __c <= '9')
        {
          __value = __value * 10 + (__c - '0');
          const int __valuec = __value * __mult;
          if (__valuec > __max || __valuec + __mult < __min)
        break;
          __mult /= 10;
        }
      else
        break;
    }
      if (__i == __len)
    __member = __value;
      // Special encoding for do_get_year, 'y', and 'Y' above.
      else if (__len == 4 && __i == 2)
    __member = __value - 100;
      else
    __err |= ios_base::failbit;

      return __beg;
    }

  // Assumptions:
  // All elements in __names are unique.
  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    _M_extract_name(iter_type __beg, iter_type __end, int& __member,
            const _CharT** __names, size_t __indexlen,
            ios_base& __io, ios_base::iostate& __err) const
    {
      typedef char_traits<_CharT>       __traits_type;
      const locale& __loc = __io._M_getloc();
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);

      int* __matches = static_cast<int*>(__builtin_alloca(sizeof(int)
                              * __indexlen));
      size_t __nmatches = 0;
      size_t __pos = 0;
      bool __testvalid = true;
      const char_type* __name;

      // Look for initial matches.
      // NB: Some of the locale data is in the form of all lowercase
      // names, and some is in the form of initially-capitalized
      // names. Look for both.
      if (__beg != __end)
    {
      const char_type __c = *__beg;
      for (size_t __i1 = 0; __i1 < __indexlen; ++__i1)
        if (__c == __names[__i1][0]
        || __c == __ctype.toupper(__names[__i1][0]))
          __matches[__nmatches++] = __i1;
    }

      while (__nmatches > 1)
    {
      // Find smallest matching string.
      size_t __minlen = __traits_type::length(__names[__matches[0]]);
      for (size_t __i2 = 1; __i2 < __nmatches; ++__i2)
        __minlen = std::min(__minlen,
                  __traits_type::length(__names[__matches[__i2]]));
      ++__beg, ++__pos;
      if (__pos < __minlen && __beg != __end)
        for (size_t __i3 = 0; __i3 < __nmatches;)
          {
        __name = __names[__matches[__i3]];
        if (!(__name[__pos] == *__beg))
          __matches[__i3] = __matches[--__nmatches];
        else
          ++__i3;
          }
      else
        break;
    }

      if (__nmatches == 1)
    {
      // Make sure found name is completely extracted.
      ++__beg, ++__pos;
      __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;

      return __beg;
    }

  template<typename _CharT, typename _InIter>
    _InIter
    time_get<_CharT, _InIter>::
    _M_extract_wday_or_month(iter_type __beg, iter_type __end, int& __member,
                 const _CharT** __names, size_t __indexlen,
                 ios_base& __io, ios_base::iostate& __err) const
    {
      typedef char_traits<_CharT>       __traits_type;
      const locale& __loc = __io._M_getloc();
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);

      int* __matches = static_cast<int*>(__builtin_alloca(2 * sizeof(int)
                              * __indexlen));
      size_t __nmatches = 0;
      size_t* __matches_lengths = 0;
      size_t __pos = 0;

      if (__beg != __end)
    {
      const char_type __c = *__beg;
      for (size_t __i = 0; __i < 2 * __indexlen; ++__i)
        if (__c == __names[__i][0]
        || __c == __ctype.toupper(__names[__i][0]))
          __matches[__nmatches++] = __i;
    }

      if (__nmatches)
    {
      ++__beg, ++__pos;

      __matches_lengths
        = static_cast<size_t*>(__builtin_alloca(sizeof(size_t)
                            * __nmatches));
      for (size_t __i = 0; __i < __nmatches; ++__i)
        __matches_lengths[__i]
          = __traits_type::length(__names[__matches[__i]]);
    }

      for (; __beg != __end; ++__beg, ++__pos)
    {
      size_t __nskipped = 0;
      const char_type __c = *__beg;
      for (size_t __i = 0; __i < __nmatches;)
        {
          const char_type* __name = __names[__matches[__i]];
          if (__pos >= __matches_lengths[__i])
        ++__nskipped, ++__i;
          else if (!(__name[__pos] == __c))
        {
          --__nmatches;
          __matches[__i] = __matches[__nmatches];
          __matches_lengths[__i] = __matches_lengths[__nmatches];
        }
          else
        ++__i;
        }
      if (__nskipped == __nmatches)
        break;
    }

      if ((__nmatches == 1 && __matches_lengths[0] == __pos)
      || (__nmatches == 2 && (__matches_lengths[0] == __pos
                  || __matches_lengths[1] == __pos)))
    __member = (__matches[0] >= __indexlen
            ? __matches[0] - __indexlen : __matches[0]);
      else
    __err |= ios_base::failbit;

      return __beg;
    }

  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
    {
      const locale& __loc = __io._M_getloc();
      const __timepunct<_CharT>& __tp = use_facet<__timepunct<_CharT> >(__loc);
      const char_type*  __times[2];
      __tp._M_time_formats(__times);
      __beg = _M_extract_via_format(__beg, __end, __io, __err, 
                    __tm, __times[0]);
      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
    {
      const locale& __loc = __io._M_getloc();
      const __timepunct<_CharT>& __tp = use_facet<__timepunct<_CharT> >(__loc);
      const char_type*  __dates[2];
      __tp._M_date_formats(__dates);
      __beg = _M_extract_via_format(__beg, __end, __io, __err, 
                    __tm, __dates[0]);
      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;
      const locale& __loc = __io._M_getloc();
      const __timepunct<_CharT>& __tp = use_facet<__timepunct<_CharT> >(__loc);
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
      const char_type* __days[14];
      __tp._M_days_abbreviated(__days);
      __tp._M_days(__days + 7);
      int __tmpwday;
      ios_base::iostate __tmperr = ios_base::goodbit;

      __beg = _M_extract_wday_or_month(__beg, __end, __tmpwday, __days, 7,
                       __io, __tmperr);
      if (!__tmperr)
    __tm->tm_wday = __tmpwday;
      else
    __err |= ios_base::failbit;

      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;
      const locale& __loc = __io._M_getloc();
      const __timepunct<_CharT>& __tp = use_facet<__timepunct<_CharT> >(__loc);
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
      const char_type*  __months[24];
      __tp._M_months_abbreviated(__months);
      __tp._M_months(__months + 12);
      int __tmpmon;
      ios_base::iostate __tmperr = ios_base::goodbit;

      __beg = _M_extract_wday_or_month(__beg, __end, __tmpmon, __months, 12,
                       __io, __tmperr);
      if (!__tmperr)
    __tm->tm_mon = __tmpmon;
      else
    __err |= ios_base::failbit;

      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
    {
      const locale& __loc = __io._M_getloc();
      const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
      int __tmpyear;
      ios_base::iostate __tmperr = ios_base::goodbit;

      __beg = _M_extract_num(__beg, __end, __tmpyear, 0, 9999, 4,
                 __io, __tmperr);
      if (!__tmperr)
    __tm->tm_year = __tmpyear < 0 ? __tmpyear + 100 : __tmpyear - 1900;
      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 __fill, const tm* __tm,
    const _CharT* __beg, const _CharT* __end) const
    {
      const locale& __loc = __io._M_getloc();
      ctype<_CharT> const& __ctype = use_facet<ctype<_CharT> >(__loc);
      for (; __beg != __end; ++__beg)
    if (__ctype.narrow(*__beg, 0) != '%')
      {
        *__s = *__beg;
        ++__s;
      }
    else if (++__beg != __end)
      {
        char __format;
        char __mod = 0;
        const char __c = __ctype.narrow(*__beg, 0);
        if (__c != 'E' && __c != 'O')
          __format = __c;
        else if (++__beg != __end)
          {
        __mod = __c;
        __format = __ctype.narrow(*__beg, 0);
          }
        else
          break;
        __s = this->do_put(__s, __io, __fill, __tm, __format, __mod);
      }
    else
      break;
      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
    {
      const locale& __loc = __io._M_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 = 128;
      char_type __res[__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.
      return std::__write(__s, __res, char_traits<char_type>::length(__res));
    }


  // Inhibit implicit instantiations for required instantiations,
  // which are defined via explicit instantiations elsewhere.
#if _GLIBCXX_EXTERN_TEMPLATE
  extern template class moneypunct<char, false>;
  extern template class moneypunct<char, true>;
  extern template class moneypunct_byname<char, false>;
  extern template class moneypunct_byname<char, true>;
  extern template class _GLIBCXX_NAMESPACE_LDBL money_get<char>;
  extern template class _GLIBCXX_NAMESPACE_LDBL money_put<char>;
  extern template class __timepunct<char>;
  extern template class time_put<char>;
  extern template class time_put_byname<char>;
  extern template class time_get<char>;
  extern template class time_get_byname<char>;
  extern template class messages<char>;
  extern template class messages_byname<char>;

  extern template
    const moneypunct<char, true>&
    use_facet<moneypunct<char, true> >(const locale&);

  extern template
    const moneypunct<char, false>&
    use_facet<moneypunct<char, false> >(const locale&);

  extern template
    const money_put<char>&
    use_facet<money_put<char> >(const locale&);

  extern template
    const money_get<char>&
    use_facet<money_get<char> >(const locale&);

  extern template
    const __timepunct<char>&
    use_facet<__timepunct<char> >(const locale&);

  extern template
    const time_put<char>&
    use_facet<time_put<char> >(const locale&);

  extern template
    const time_get<char>&
    use_facet<time_get<char> >(const locale&);

  extern template
    const messages<char>&
    use_facet<messages<char> >(const locale&);

  extern template
    bool
    has_facet<moneypunct<char> >(const locale&);

  extern template
    bool
    has_facet<money_put<char> >(const locale&);

  extern template
    bool
    has_facet<money_get<char> >(const locale&);

  extern template
    bool
    has_facet<__timepunct<char> >(const locale&);

  extern template
    bool
    has_facet<time_put<char> >(const locale&);

  extern template
    bool
    has_facet<time_get<char> >(const locale&);

  extern template
    bool
    has_facet<messages<char> >(const locale&);

#ifdef _GLIBCXX_USE_WCHAR_T
  extern template class moneypunct<wchar_t, false>;
  extern template class moneypunct<wchar_t, true>;
  extern template class moneypunct_byname<wchar_t, false>;
  extern template class moneypunct_byname<wchar_t, true>;
  extern template class _GLIBCXX_NAMESPACE_LDBL money_get<wchar_t>;
  extern template class _GLIBCXX_NAMESPACE_LDBL money_put<wchar_t>;
  extern template class __timepunct<wchar_t>;
  extern template class time_put<wchar_t>;
  extern template class time_put_byname<wchar_t>;
  extern template class time_get<wchar_t>;
  extern template class time_get_byname<wchar_t>;
  extern template class messages<wchar_t>;
  extern template class messages_byname<wchar_t>;

  extern template
    const moneypunct<wchar_t, true>&
    use_facet<moneypunct<wchar_t, true> >(const locale&);

  extern template
    const moneypunct<wchar_t, false>&
    use_facet<moneypunct<wchar_t, false> >(const locale&);

  extern template
    const money_put<wchar_t>&
    use_facet<money_put<wchar_t> >(const locale&);

  extern template
    const money_get<wchar_t>&
    use_facet<money_get<wchar_t> >(const locale&);

  extern template
    const __timepunct<wchar_t>&
    use_facet<__timepunct<wchar_t> >(const locale&);

  extern template
    const time_put<wchar_t>&
    use_facet<time_put<wchar_t> >(const locale&);

  extern template
    const time_get<wchar_t>&
    use_facet<time_get<wchar_t> >(const locale&);

  extern template
    const messages<wchar_t>&
    use_facet<messages<wchar_t> >(const locale&);

  extern template
    bool
    has_facet<moneypunct<wchar_t> >(const locale&);

  extern template
    bool
    has_facet<money_put<wchar_t> >(const locale&);

  extern template
    bool
    has_facet<money_get<wchar_t> >(const locale&);

  extern template
    bool
    has_facet<__timepunct<wchar_t> >(const locale&);

  extern template
    bool
    has_facet<time_put<wchar_t> >(const locale&);

  extern template
    bool
    has_facet<time_get<wchar_t> >(const locale&);

  extern template
    bool
    has_facet<messages<wchar_t> >(const locale&);
#endif
#endif

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif