locale_facets.h

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

// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
// 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// 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: 22.1  Locales
//

#ifndef _LOCALE_FACETS_H
#define _LOCALE_FACETS_H 1

#pragma GCC system_header

#include <ctime>    // For struct tm
#include <cwctype>  // For wctype_t
#include <iosfwd>
#include <bits/ios_base.h>  // For ios_base, ios_base::iostate
#include <streambuf>

namespace std
{
  // NB: Don't instantiate required wchar_t facets if no wchar_t support.
#ifdef _GLIBCXX_USE_WCHAR_T
# define  _GLIBCXX_NUM_FACETS 28
#else
# define  _GLIBCXX_NUM_FACETS 14
#endif

  // 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);

  // Explicit specializations for required types.
  template<>
    void
    __convert_to_v(const char*, float&, ios_base::iostate&,
           const __c_locale&);

  template<>
    void
    __convert_to_v(const char*, double&, ios_base::iostate&,
           const __c_locale&);

  template<>
    void
    __convert_to_v(const char*, long double&, ios_base::iostate&,
           const __c_locale&);

  // NB: __pad is a struct, rather than a function, so it can be
  // partially-specialized.
  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);
    };

  // Used by both numeric and monetary facets.
  // Inserts "group separator" characters into an array of characters.
  // It's recursive, one iteration per group.  It moves the characters
  // in the buffer this way: "xxxx12345" -> "12,345xxx".  Call this
  // only with __glen != 0.
  template<typename _CharT>
    _CharT*
    __add_grouping(_CharT* __s, _CharT __sep,
           const char* __gbeg, size_t __gsize,
           const _CharT* __first, const _CharT* __last);

  // This template permits specializing facet output code for
  // ostreambuf_iterator.  For ostreambuf_iterator, sputn is
  // significantly more efficient than incrementing iterators.
  template<typename _CharT>
    inline
    ostreambuf_iterator<_CharT>
    __write(ostreambuf_iterator<_CharT> __s, const _CharT* __ws, int __len)
    {
      __s._M_put(__ws, __len);
      return __s;
    }

  // This is the unspecialized form of the template.
  template<typename _CharT, typename _OutIter>
    inline
    _OutIter
    __write(_OutIter __s, const _CharT* __ws, int __len)
    {
      for (int __j = 0; __j < __len; __j++, ++__s)
    *__s = __ws[__j];
      return __s;
    }


  // 22.2.1.1  Template class ctype
  // Include host and configuration specific ctype enums for ctype_base.
  #include <bits/ctype_base.h>

  // Common base for ctype<_CharT>.
  template<typename _CharT>
    class __ctype_abstract_base : public locale::facet, public ctype_base
    {
    public:
      // Types:
      typedef _CharT char_type;

      bool
      is(mask __m, char_type __c) const
      { return this->do_is(__m, __c); }

      const char_type*
      is(const char_type *__lo, const char_type *__hi, mask *__vec) const
      { return this->do_is(__lo, __hi, __vec); }

      const char_type*
      scan_is(mask __m, const char_type* __lo, const char_type* __hi) const
      { return this->do_scan_is(__m, __lo, __hi); }

      const char_type*
      scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
      { return this->do_scan_not(__m, __lo, __hi); }

      char_type
      toupper(char_type __c) const
      { return this->do_toupper(__c); }

      const char_type*
      toupper(char_type *__lo, const char_type* __hi) const
      { return this->do_toupper(__lo, __hi); }

      char_type
      tolower(char_type __c) const
      { return this->do_tolower(__c); }

      const char_type*
      tolower(char_type* __lo, const char_type* __hi) const
      { return this->do_tolower(__lo, __hi); }

      char_type
      widen(char __c) const
      { return this->do_widen(__c); }

      const char*
      widen(const char* __lo, const char* __hi, char_type* __to) const
      { return this->do_widen(__lo, __hi, __to); }

      char
      narrow(char_type __c, char __dfault) const
      { return this->do_narrow(__c, __dfault); }

      const char_type*
      narrow(const char_type* __lo, const char_type* __hi,
          char __dfault, char *__to) const
      { return this->do_narrow(__lo, __hi, __dfault, __to); }

    protected:
      explicit
      __ctype_abstract_base(size_t __refs = 0): facet(__refs) { }

      virtual
      ~__ctype_abstract_base() { }

      virtual bool
      do_is(mask __m, char_type __c) const = 0;

      virtual const char_type*
      do_is(const char_type* __lo, const char_type* __hi,
        mask* __vec) const = 0;

      virtual const char_type*
      do_scan_is(mask __m, const char_type* __lo,
         const char_type* __hi) const = 0;

      virtual const char_type*
      do_scan_not(mask __m, const char_type* __lo,
          const char_type* __hi) const = 0;

      virtual char_type
      do_toupper(char_type) const = 0;

      virtual const char_type*
      do_toupper(char_type* __lo, const char_type* __hi) const = 0;

      virtual char_type
      do_tolower(char_type) const = 0;

      virtual const char_type*
      do_tolower(char_type* __lo, const char_type* __hi) const = 0;

      virtual char_type
      do_widen(char) const = 0;

      virtual const char*
      do_widen(const char* __lo, const char* __hi,
           char_type* __dest) const = 0;

      virtual char
      do_narrow(char_type, char __dfault) const = 0;

      virtual const char_type*
      do_narrow(const char_type* __lo, const char_type* __hi,
        char __dfault, char* __dest) const = 0;
    };

  // NB: Generic, mostly useless implementation.
  template<typename _CharT>
    class ctype : public __ctype_abstract_base<_CharT>
    {
    public:
      // Types:
      typedef _CharT            char_type;
      typedef typename __ctype_abstract_base<_CharT>::mask mask;

      static locale::id         id;

      explicit
      ctype(size_t __refs = 0) : __ctype_abstract_base<_CharT>(__refs) { }

   protected:
      virtual
      ~ctype();

      virtual bool
      do_is(mask __m, char_type __c) const;

      virtual const char_type*
      do_is(const char_type* __lo, const char_type* __hi, mask* __vec) const;

      virtual const char_type*
      do_scan_is(mask __m, const char_type* __lo, const char_type* __hi) const;

      virtual const char_type*
      do_scan_not(mask __m, const char_type* __lo,
          const char_type* __hi) const;

      virtual char_type
      do_toupper(char_type __c) const;

      virtual const char_type*
      do_toupper(char_type* __lo, const char_type* __hi) const;

      virtual char_type
      do_tolower(char_type __c) const;

      virtual const char_type*
      do_tolower(char_type* __lo, const char_type* __hi) const;

      virtual char_type
      do_widen(char __c) const;

      virtual const char*
      do_widen(const char* __lo, const char* __hi, char_type* __dest) const;

      virtual char
      do_narrow(char_type, char __dfault) const;

      virtual const char_type*
      do_narrow(const char_type* __lo, const char_type* __hi,
        char __dfault, char* __dest) const;
    };

  template<typename _CharT>
    locale::id ctype<_CharT>::id;

  // 22.2.1.3  ctype<char> specialization.
  template<>
    class ctype<char> : public locale::facet, public ctype_base
    {
    public:
      // Types:
      typedef char      char_type;

    protected:
      // Data Members:
      __c_locale        _M_c_locale_ctype;
      bool          _M_del;
      __to_type         _M_toupper;
      __to_type         _M_tolower;
      const mask*       _M_table;
      mutable char      _M_widen_ok;
      mutable char      _M_widen[1 + static_cast<unsigned char>(-1)];
      mutable char      _M_narrow[1 + static_cast<unsigned char>(-1)];
      mutable char      _M_narrow_ok;   // 0 uninitialized, 1 init,
                        // 2 memcpy can't be used

    public:
      static locale::id        id;
      static const size_t      table_size = 1 + static_cast<unsigned char>(-1);

      explicit
      ctype(const mask* __table = 0, bool __del = false, size_t __refs = 0);

      explicit
      ctype(__c_locale __cloc, const mask* __table = 0, bool __del = false,
        size_t __refs = 0);

      inline bool
      is(mask __m, char __c) const;

      inline const char*
      is(const char* __lo, const char* __hi, mask* __vec) const;

      inline const char*
      scan_is(mask __m, const char* __lo, const char* __hi) const;

      inline const char*
      scan_not(mask __m, const char* __lo, const char* __hi) const;

      char_type
      toupper(char_type __c) const
      { return this->do_toupper(__c); }

      const char_type*
      toupper(char_type *__lo, const char_type* __hi) const
      { return this->do_toupper(__lo, __hi); }

      char_type
      tolower(char_type __c) const
      { return this->do_tolower(__c); }

      const char_type*
      tolower(char_type* __lo, const char_type* __hi) const
      { return this->do_tolower(__lo, __hi); }

      char_type
      widen(char __c) const
      {
    if (_M_widen_ok)
      return _M_widen[static_cast<unsigned char>(__c)];
    this->_M_widen_init();
    return this->do_widen(__c);
      }

      const char*
      widen(const char* __lo, const char* __hi, char_type* __to) const
      {
    if (_M_widen_ok == 1)
      {
        memcpy(__to, __lo, __hi - __lo);
        return __hi;
      }
    if (!_M_widen_ok)
      _M_widen_init();
    return this->do_widen(__lo, __hi, __to);
      }

      char
      narrow(char_type __c, char __dfault) const
      {
    if (_M_narrow[static_cast<unsigned char>(__c)])
      return _M_narrow[static_cast<unsigned char>(__c)];
    const char __t = do_narrow(__c, __dfault);
    if (__t != __dfault)
      _M_narrow[static_cast<unsigned char>(__c)] = __t;
    return __t;
      }

      const char_type*
      narrow(const char_type* __lo, const char_type* __hi,
         char __dfault, char *__to) const
      {
    if (__builtin_expect(_M_narrow_ok == 1, true))
      {
        memcpy(__to, __lo, __hi - __lo);
        return __hi;
      }
    if (!_M_narrow_ok)
      _M_narrow_init();
    return this->do_narrow(__lo, __hi, __dfault, __to);
      }

    protected:
      const mask*
      table() const throw()
      { return _M_table; }

      static const mask*
      classic_table() throw();

      virtual
      ~ctype();

      virtual char_type
      do_toupper(char_type) const;

      virtual const char_type*
      do_toupper(char_type* __lo, const char_type* __hi) const;

      virtual char_type
      do_tolower(char_type) const;

      virtual const char_type*
      do_tolower(char_type* __lo, const char_type* __hi) const;

      virtual char_type
      do_widen(char __c) const
      { return __c; }

      virtual const char*
      do_widen(const char* __lo, const char* __hi, char_type* __dest) const
      {
    memcpy(__dest, __lo, __hi - __lo);
    return __hi;
      }

      virtual char
      do_narrow(char_type __c, char) const
      { return __c; }

      virtual const char_type*
      do_narrow(const char_type* __lo, const char_type* __hi,
        char, char* __dest) const
      {
    memcpy(__dest, __lo, __hi - __lo);
    return __hi;
      }

    private:

      void _M_widen_init() const
      {
    char __tmp[sizeof(_M_widen)];
    for (size_t __i = 0; __i < sizeof(_M_widen); ++__i)
      __tmp[__i] = __i;
    do_widen(__tmp, __tmp + sizeof(__tmp), _M_widen);

    _M_widen_ok = 1;
    // Set _M_widen_ok to 2 if memcpy can't be used.
    if (memcmp(__tmp, _M_widen, sizeof(_M_widen)))
      _M_widen_ok = 2;
      }

      // Fill in the narrowing cache and flag whether all values are
      // valid or not.  _M_narrow_ok is set to 2 if memcpy can't
      // be used.
      void _M_narrow_init() const
      {
    char __tmp[sizeof(_M_narrow)];
    for (size_t __i = 0; __i < sizeof(_M_narrow); ++__i)
      __tmp[__i] = __i;
    do_narrow(__tmp, __tmp + sizeof(__tmp), 0, _M_narrow);

    _M_narrow_ok = 1;
    if (memcmp(__tmp, _M_narrow, sizeof(_M_narrow)))
      _M_narrow_ok = 2;
    else
      {
        // Deal with the special case of zero: renarrow with a
        // different default and compare.
        char __c;
        do_narrow(__tmp, __tmp + 1, 1, &__c);
        if (__c == 1)
          _M_narrow_ok = 2;
      }
      }
    };

  template<>
    const ctype<char>&
    use_facet<ctype<char> >(const locale& __loc);

#ifdef _GLIBCXX_USE_WCHAR_T
  // 22.2.1.3  ctype<wchar_t> specialization
  template<>
    class ctype<wchar_t> : public __ctype_abstract_base<wchar_t>
    {
    public:
      // Types:
      typedef wchar_t       char_type;
      typedef wctype_t      __wmask_type;

    protected:
      __c_locale        _M_c_locale_ctype;

      // Pre-computed narrowed and widened chars.
      bool                      _M_narrow_ok;
      char                      _M_narrow[128];
      wint_t                    _M_widen[1 + static_cast<unsigned char>(-1)];

      // Pre-computed elements for do_is.
      mask                      _M_bit[16];
      __wmask_type              _M_wmask[16];

    public:
      // Data Members:
      static locale::id     id;

      explicit
      ctype(size_t __refs = 0);

      explicit
      ctype(__c_locale __cloc, size_t __refs = 0);

    protected:
      __wmask_type
      _M_convert_to_wmask(const mask __m) const;

      virtual
      ~ctype();

      virtual bool
      do_is(mask __m, char_type __c) const;

      virtual const char_type*
      do_is(const char_type* __lo, const char_type* __hi, mask* __vec) const;

      virtual const char_type*
      do_scan_is(mask __m, const char_type* __lo, const char_type* __hi) const;

      virtual const char_type*
      do_scan_not(mask __m, const char_type* __lo,
          const char_type* __hi) const;

      virtual char_type
      do_toupper(char_type) const;

      virtual const char_type*
      do_toupper(char_type* __lo, const char_type* __hi) const;

      virtual char_type
      do_tolower(char_type) const;

      virtual const char_type*
      do_tolower(char_type* __lo, const char_type* __hi) const;

      virtual char_type
      do_widen(char) const;

      virtual const char*
      do_widen(const char* __lo, const char* __hi, char_type* __dest) const;

      virtual char
      do_narrow(char_type, char __dfault) const;

      virtual const char_type*
      do_narrow(const char_type* __lo, const char_type* __hi,
        char __dfault, char* __dest) const;

      // For use at construction time only.
      void
      _M_initialize_ctype();
    };

  template<>
    const ctype<wchar_t>&
    use_facet<ctype<wchar_t> >(const locale& __loc);
#endif //_GLIBCXX_USE_WCHAR_T

  // Include host and configuration specific ctype inlines.
  #include <bits/ctype_inline.h>

  template<typename _CharT>
    class ctype_byname : public ctype<_CharT>
    {
    public:
      typedef _CharT        char_type;

      explicit
      ctype_byname(const char* __s, size_t __refs = 0);

    protected:
      virtual
      ~ctype_byname() { };
    };

  template<>
    ctype_byname<char>::ctype_byname(const char*, size_t refs);

  template<>
    ctype_byname<wchar_t>::ctype_byname(const char*, size_t refs);

  // 22.2.1.5  Template class codecvt
  #include <bits/codecvt.h>

  // 22.2.2  The numeric category.
  class __num_base
  {
  public:
    // NB: Code depends on the order of _S_atoms_out elements.
    // Below are the indices into _S_atoms_out.
    enum
      {
        _S_ominus,
        _S_oplus,
        _S_ox,
        _S_oX,
        _S_odigits,
        _S_odigits_end = _S_odigits + 16,
        _S_oudigits = _S_odigits_end,
        _S_oudigits_end = _S_oudigits + 16,
        _S_oe = _S_odigits + 14,  // For scientific notation, 'e'
        _S_oE = _S_oudigits + 14, // For scientific notation, 'E'
    _S_oend = _S_oudigits_end
      };

    // A list of valid numeric literals for output.  This array
    // contains chars that will be passed through the current locale's
    // ctype<_CharT>.widen() and then used to render numbers.
    // For the standard "C" locale, this is
    // "-+xX0123456789abcdef0123456789ABCDEF".
    static const char* _S_atoms_out;

    // String literal of acceptable (narrow) input, for num_get.
    // "-+xX0123456789abcdefABCDEF"
    static const char* _S_atoms_in;

    enum
    {
      _S_iminus,
      _S_iplus,
      _S_ix,
      _S_iX,
      _S_izero,
      _S_ie = _S_izero + 14,
      _S_iE = _S_izero + 20,
      _S_iend = 26
    };

    // num_put
    // Construct and return valid scanf format for floating point types.
    static void
    _S_format_float(const ios_base& __io, char* __fptr, char __mod);
  };

  template<typename _CharT>
    struct __numpunct_cache : public locale::facet
    {
      const char*           _M_grouping;
      size_t                            _M_grouping_size;
      bool              _M_use_grouping;
      const _CharT*         _M_truename;
      size_t                            _M_truename_size;
      const _CharT*         _M_falsename;
      size_t                            _M_falsename_size;
      _CharT                _M_decimal_point;
      _CharT                _M_thousands_sep;

      // A list of valid numeric literals for output: in the standard
      // "C" locale, this is "-+xX0123456789abcdef0123456789ABCDEF".
      // This array contains the chars after having been passed
      // through the current locale's ctype<_CharT>.widen().
      _CharT                _M_atoms_out[__num_base::_S_oend];

      // A list of valid numeric literals for input: in the standard
      // "C" locale, this is "-+xX0123456789abcdefABCDEF"
      // This array contains the chars after having been passed
      // through the current locale's ctype<_CharT>.widen().
      _CharT                _M_atoms_in[__num_base::_S_iend];

      bool              _M_allocated;

      __numpunct_cache(size_t __refs = 0) : facet(__refs),
      _M_grouping(NULL), _M_grouping_size(0), _M_use_grouping(false),
      _M_truename(NULL), _M_truename_size(0), _M_falsename(NULL),
      _M_falsename_size(0), _M_decimal_point(_CharT()),
      _M_thousands_sep(_CharT()), _M_allocated(false)
      { }

      ~__numpunct_cache();

      void
      _M_cache(const locale& __loc);

    private:
      __numpunct_cache&
      operator=(const __numpunct_cache&);
      
      explicit
      __numpunct_cache(const __numpunct_cache&);
    };

  template<typename _CharT>
    __numpunct_cache<_CharT>::~__numpunct_cache()
    {
      if (_M_allocated)
    {
      delete [] _M_grouping;
      delete [] _M_truename;
      delete [] _M_falsename;
    }
    }

  template<typename _CharT>
    class numpunct : public locale::facet
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef basic_string<_CharT>  string_type;
      typedef __numpunct_cache<_CharT>  __cache_type;

    protected:
      __cache_type*         _M_data;

    public:
      static locale::id         id;

      explicit
      numpunct(size_t __refs = 0) : facet(__refs), _M_data(NULL)
      { _M_initialize_numpunct(); }

      explicit
      numpunct(__cache_type* __cache, size_t __refs = 0)
      : facet(__refs), _M_data(__cache)
      { _M_initialize_numpunct(); }

      explicit
      numpunct(__c_locale __cloc, size_t __refs = 0)
      : facet(__refs), _M_data(NULL)
      { _M_initialize_numpunct(__cloc); }

      char_type
      decimal_point() const
      { return this->do_decimal_point(); }

      char_type
      thousands_sep() const
      { return this->do_thousands_sep(); }

      string
      grouping() const
      { return this->do_grouping(); }

      string_type
      truename() const
      { return this->do_truename(); }

      string_type
      falsename() const
      { return this->do_falsename(); }

    protected:
      virtual
      ~numpunct();

      virtual char_type
      do_decimal_point() const
      { return _M_data->_M_decimal_point; }

      virtual char_type
      do_thousands_sep() const
      { return _M_data->_M_thousands_sep; }

      virtual string
      do_grouping() const
      { return _M_data->_M_grouping; }

      virtual string_type
      do_truename() const
      { return _M_data->_M_truename; }

      virtual string_type
      do_falsename() const
      { return _M_data->_M_falsename; }

      // For use at construction time only.
      void
      _M_initialize_numpunct(__c_locale __cloc = NULL);
    };

  template<typename _CharT>
    locale::id numpunct<_CharT>::id;

  template<>
    numpunct<char>::~numpunct();

  template<>
    void
    numpunct<char>::_M_initialize_numpunct(__c_locale __cloc);

#ifdef _GLIBCXX_USE_WCHAR_T
  template<>
    numpunct<wchar_t>::~numpunct();

  template<>
    void
    numpunct<wchar_t>::_M_initialize_numpunct(__c_locale __cloc);
#endif

  template<typename _CharT>
    class numpunct_byname : public numpunct<_CharT>
    {
    public:
      typedef _CharT            char_type;
      typedef basic_string<_CharT>  string_type;

      explicit
      numpunct_byname(const char* __s, size_t __refs = 0)
      : numpunct<_CharT>(__refs)
      {
    if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
      {
        __c_locale __tmp;
        this->_S_create_c_locale(__tmp, __s);
        this->_M_initialize_numpunct(__tmp);
        this->_S_destroy_c_locale(__tmp);
      }
      }

    protected:
      virtual
      ~numpunct_byname() { }
    };

_GLIBCXX_BEGIN_LDBL_NAMESPACE
  template<typename _CharT, typename _InIter>
    class num_get : public locale::facet
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef _InIter           iter_type;

      static locale::id         id;

      explicit
      num_get(size_t __refs = 0) : facet(__refs) { }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, bool& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }


      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, long& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, unsigned short& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, unsigned int& __v)   const
      { return this->do_get(__in, __end, __io, __err, __v); }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, unsigned long& __v)  const
      { return this->do_get(__in, __end, __io, __err, __v); }

#ifdef _GLIBCXX_USE_LONG_LONG
      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, long long& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, unsigned long long& __v)  const
      { return this->do_get(__in, __end, __io, __err, __v); }
#endif



      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, float& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, double& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, long double& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }

      iter_type
      get(iter_type __in, iter_type __end, ios_base& __io,
      ios_base::iostate& __err, void*& __v) const
      { return this->do_get(__in, __end, __io, __err, __v); }

    protected:
      virtual ~num_get() { }

      iter_type
      _M_extract_float(iter_type, iter_type, ios_base&, ios_base::iostate&,
               string& __xtrc) const;

      template<typename _ValueT>
        iter_type
        _M_extract_int(iter_type, iter_type, ios_base&, ios_base::iostate&,
               _ValueT& __v) const;


      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, bool&) const;


      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate&, long&) const;

      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
          unsigned short&) const;

      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         unsigned int&) const;

      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         unsigned long&) const;

#ifdef _GLIBCXX_USE_LONG_LONG
      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         long long&) const;

      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         unsigned long long&) const;
#endif

      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         float&) const;

      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         double&) const;

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      __do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
           double&) const;
#else
      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         long double&) const;
#endif

      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         void*&) const;

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      do_get(iter_type, iter_type, ios_base&, ios_base::iostate& __err,
         long double&) const;
#endif

    };

  template<typename _CharT, typename _InIter>
    locale::id num_get<_CharT, _InIter>::id;


  template<typename _CharT, typename _OutIter>
    class num_put : public locale::facet
    {
    public:
      // Types:

      typedef _CharT        char_type;
      typedef _OutIter      iter_type;

      static locale::id     id;

      explicit
      num_put(size_t __refs = 0) : facet(__refs) { }

      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill, bool __v) const
      { return this->do_put(__s, __f, __fill, __v); }


      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill, long __v) const
      { return this->do_put(__s, __f, __fill, __v); }

      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill,
      unsigned long __v) const
      { return this->do_put(__s, __f, __fill, __v); }

#ifdef _GLIBCXX_USE_LONG_LONG
      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill, long long __v) const
      { return this->do_put(__s, __f, __fill, __v); }

      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill,
      unsigned long long __v) const
      { return this->do_put(__s, __f, __fill, __v); }
#endif



      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill, double __v) const
      { return this->do_put(__s, __f, __fill, __v); }

      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill,
      long double __v) const
      { return this->do_put(__s, __f, __fill, __v); }

      iter_type
      put(iter_type __s, ios_base& __f, char_type __fill,
      const void* __v) const
      { return this->do_put(__s, __f, __fill, __v); }

    protected:
      template<typename _ValueT>
        iter_type
        _M_insert_float(iter_type, ios_base& __io, char_type __fill,
            char __mod, _ValueT __v) const;

      void
      _M_group_float(const char* __grouping, size_t __grouping_size,
             char_type __sep, const char_type* __p, char_type* __new,
             char_type* __cs, int& __len) const;

      template<typename _ValueT>
        iter_type
        _M_insert_int(iter_type, ios_base& __io, char_type __fill,
              _ValueT __v) const;

      void
      _M_group_int(const char* __grouping, size_t __grouping_size,
           char_type __sep, ios_base& __io, char_type* __new,
           char_type* __cs, int& __len) const;

      void
      _M_pad(char_type __fill, streamsize __w, ios_base& __io,
         char_type* __new, const char_type* __cs, int& __len) const;

      virtual
      ~num_put() { };


      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, bool __v) const;

      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, long __v) const;

      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, unsigned long) const;

#ifdef _GLIBCXX_USE_LONG_LONG
      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, long long __v) const;

      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, unsigned long long) const;
#endif

      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, double __v) const;

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      __do_put(iter_type, ios_base&, char_type __fill, double __v) const;
#else
      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, long double __v) const;
#endif

      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, const void* __v) const;

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      do_put(iter_type, ios_base&, char_type __fill, long double __v) const;
#endif

    };

  template <typename _CharT, typename _OutIter>
    locale::id num_put<_CharT, _OutIter>::id;

_GLIBCXX_END_LDBL_NAMESPACE

  template<typename _CharT>
    class collate : public locale::facet
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef basic_string<_CharT>  string_type;

    protected:
      // Underlying "C" library locale information saved from
      // initialization, needed by collate_byname as well.
      __c_locale            _M_c_locale_collate;

    public:
      static locale::id         id;

      explicit
      collate(size_t __refs = 0)
      : facet(__refs), _M_c_locale_collate(_S_get_c_locale())
      { }

      explicit
      collate(__c_locale __cloc, size_t __refs = 0)
      : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc))
      { }

      int
      compare(const _CharT* __lo1, const _CharT* __hi1,
          const _CharT* __lo2, const _CharT* __hi2) const
      { return this->do_compare(__lo1, __hi1, __lo2, __hi2); }

      string_type
      transform(const _CharT* __lo, const _CharT* __hi) const
      { return this->do_transform(__lo, __hi); }

      long
      hash(const _CharT* __lo, const _CharT* __hi) const
      { return this->do_hash(__lo, __hi); }

      // Used to abstract out _CharT bits in virtual member functions, below.
      int
      _M_compare(const _CharT*, const _CharT*) const;

      size_t
      _M_transform(_CharT*, const _CharT*, size_t) const;

  protected:
      virtual
      ~collate()
      { _S_destroy_c_locale(_M_c_locale_collate); }

      virtual int
      do_compare(const _CharT* __lo1, const _CharT* __hi1,
         const _CharT* __lo2, const _CharT* __hi2) const;

      virtual string_type
      do_transform(const _CharT* __lo, const _CharT* __hi) const;

      virtual long
      do_hash(const _CharT* __lo, const _CharT* __hi) const;
    };

  template<typename _CharT>
    locale::id collate<_CharT>::id;

  // Specializations.
  template<>
    int
    collate<char>::_M_compare(const char*, const char*) const;

  template<>
    size_t
    collate<char>::_M_transform(char*, const char*, size_t) const;

#ifdef _GLIBCXX_USE_WCHAR_T
  template<>
    int
    collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const;

  template<>
    size_t
    collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const;
#endif

  template<typename _CharT>
    class collate_byname : public collate<_CharT>
    {
    public:

      typedef _CharT               char_type;
      typedef basic_string<_CharT> string_type;

      explicit
      collate_byname(const char* __s, size_t __refs = 0)
      : collate<_CharT>(__refs)
      {
    if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
      {
        this->_S_destroy_c_locale(this->_M_c_locale_collate);
        this->_S_create_c_locale(this->_M_c_locale_collate, __s);
      }
      }

    protected:
      virtual
      ~collate_byname() { }
    };


  class time_base
  {
  public:
    enum dateorder { no_order, dmy, mdy, ymd, ydm };
  };

  template<typename _CharT>
    struct __timepunct_cache : public locale::facet
    {
      // List of all known timezones, with GMT first.
      static const _CharT*      _S_timezones[14];

      const _CharT*         _M_date_format;
      const _CharT*         _M_date_era_format;
      const _CharT*         _M_time_format;
      const _CharT*         _M_time_era_format;
      const _CharT*         _M_date_time_format;
      const _CharT*         _M_date_time_era_format;
      const _CharT*         _M_am;
      const _CharT*         _M_pm;
      const _CharT*         _M_am_pm_format;

      // Day names, starting with "C"'s Sunday.
      const _CharT*         _M_day1;
      const _CharT*         _M_day2;
      const _CharT*         _M_day3;
      const _CharT*         _M_day4;
      const _CharT*         _M_day5;
      const _CharT*         _M_day6;
      const _CharT*         _M_day7;

      // Abbreviated day names, starting with "C"'s Sun.
      const _CharT*         _M_aday1;
      const _CharT*         _M_aday2;
      const _CharT*         _M_aday3;
      const _CharT*         _M_aday4;
      const _CharT*         _M_aday5;
      const _CharT*         _M_aday6;
      const _CharT*         _M_aday7;

      // Month names, starting with "C"'s January.
      const _CharT*         _M_month01;
      const _CharT*         _M_month02;
      const _CharT*         _M_month03;
      const _CharT*         _M_month04;
      const _CharT*         _M_month05;
      const _CharT*         _M_month06;
      const _CharT*         _M_month07;
      const _CharT*         _M_month08;
      const _CharT*         _M_month09;
      const _CharT*         _M_month10;
      const _CharT*         _M_month11;
      const _CharT*         _M_month12;

      // Abbreviated month names, starting with "C"'s Jan.
      const _CharT*         _M_amonth01;
      const _CharT*         _M_amonth02;
      const _CharT*         _M_amonth03;
      const _CharT*         _M_amonth04;
      const _CharT*         _M_amonth05;
      const _CharT*         _M_amonth06;
      const _CharT*         _M_amonth07;
      const _CharT*         _M_amonth08;
      const _CharT*         _M_amonth09;
      const _CharT*         _M_amonth10;
      const _CharT*         _M_amonth11;
      const _CharT*         _M_amonth12;

      bool              _M_allocated;

      __timepunct_cache(size_t __refs = 0) : facet(__refs),
      _M_date_format(NULL), _M_date_era_format(NULL), _M_time_format(NULL),
      _M_time_era_format(NULL), _M_date_time_format(NULL),
      _M_date_time_era_format(NULL), _M_am(NULL), _M_pm(NULL),
      _M_am_pm_format(NULL), _M_day1(NULL), _M_day2(NULL), _M_day3(NULL),
      _M_day4(NULL), _M_day5(NULL), _M_day6(NULL), _M_day7(NULL),
      _M_aday1(NULL), _M_aday2(NULL), _M_aday3(NULL), _M_aday4(NULL),
      _M_aday5(NULL), _M_aday6(NULL), _M_aday7(NULL), _M_month01(NULL),
      _M_month02(NULL), _M_month03(NULL), _M_month04(NULL), _M_month05(NULL),
      _M_month06(NULL), _M_month07(NULL), _M_month08(NULL), _M_month09(NULL),
      _M_month10(NULL), _M_month11(NULL), _M_month12(NULL), _M_amonth01(NULL),
      _M_amonth02(NULL), _M_amonth03(NULL), _M_amonth04(NULL),
      _M_amonth05(NULL), _M_amonth06(NULL), _M_amonth07(NULL),
      _M_amonth08(NULL), _M_amonth09(NULL), _M_amonth10(NULL),
      _M_amonth11(NULL), _M_amonth12(NULL), _M_allocated(false)
      { }

      ~__timepunct_cache();

      void
      _M_cache(const locale& __loc);

    private:
      __timepunct_cache&
      operator=(const __timepunct_cache&);
      
      explicit
      __timepunct_cache(const __timepunct_cache&);
    };

  template<typename _CharT>
    __timepunct_cache<_CharT>::~__timepunct_cache()
    {
      if (_M_allocated)
    {
      // Unused.
    }
    }

  // Specializations.
  template<>
    const char*
    __timepunct_cache<char>::_S_timezones[14];

#ifdef _GLIBCXX_USE_WCHAR_T
  template<>
    const wchar_t*
    __timepunct_cache<wchar_t>::_S_timezones[14];
#endif

  // Generic.
  template<typename _CharT>
    const _CharT* __timepunct_cache<_CharT>::_S_timezones[14];

  template<typename _CharT>
    class __timepunct : public locale::facet
    {
    public:
      // Types:
      typedef _CharT            __char_type;
      typedef basic_string<_CharT>  __string_type;
      typedef __timepunct_cache<_CharT> __cache_type;

    protected:
      __cache_type*         _M_data;
      __c_locale            _M_c_locale_timepunct;
      const char*           _M_name_timepunct;

    public:
      static locale::id         id;

      explicit
      __timepunct(size_t __refs = 0);

      explicit
      __timepunct(__cache_type* __cache, size_t __refs = 0);

      explicit
      __timepunct(__c_locale __cloc, const char* __s, size_t __refs = 0);

      // FIXME: for error checking purposes _M_put should return the return
      // value of strftime/wcsftime.
      void
      _M_put(_CharT* __s, size_t __maxlen, const _CharT* __format,
         const tm* __tm) const;

      void
      _M_date_formats(const _CharT** __date) const
      {
    // Always have default first.
    __date[0] = _M_data->_M_date_format;
    __date[1] = _M_data->_M_date_era_format;
      }

      void
      _M_time_formats(const _CharT** __time) const
      {
    // Always have default first.
    __time[0] = _M_data->_M_time_format;
    __time[1] = _M_data->_M_time_era_format;
      }

      void
      _M_date_time_formats(const _CharT** __dt) const
      {
    // Always have default first.
    __dt[0] = _M_data->_M_date_time_format;
    __dt[1] = _M_data->_M_date_time_era_format;
      }

      void
      _M_am_pm_format(const _CharT* __ampm) const
      { __ampm = _M_data->_M_am_pm_format; }

      void
      _M_am_pm(const _CharT** __ampm) const
      {
    __ampm[0] = _M_data->_M_am;
    __ampm[1] = _M_data->_M_pm;
      }

      void
      _M_days(const _CharT** __days) const
      {
    __days[0] = _M_data->_M_day1;
    __days[1] = _M_data->_M_day2;
    __days[2] = _M_data->_M_day3;
    __days[3] = _M_data->_M_day4;
    __days[4] = _M_data->_M_day5;
    __days[5] = _M_data->_M_day6;
    __days[6] = _M_data->_M_day7;
      }

      void
      _M_days_abbreviated(const _CharT** __days) const
      {
    __days[0] = _M_data->_M_aday1;
    __days[1] = _M_data->_M_aday2;
    __days[2] = _M_data->_M_aday3;
    __days[3] = _M_data->_M_aday4;
    __days[4] = _M_data->_M_aday5;
    __days[5] = _M_data->_M_aday6;
    __days[6] = _M_data->_M_aday7;
      }

      void
      _M_months(const _CharT** __months) const
      {
    __months[0] = _M_data->_M_month01;
    __months[1] = _M_data->_M_month02;
    __months[2] = _M_data->_M_month03;
    __months[3] = _M_data->_M_month04;
    __months[4] = _M_data->_M_month05;
    __months[5] = _M_data->_M_month06;
    __months[6] = _M_data->_M_month07;
    __months[7] = _M_data->_M_month08;
    __months[8] = _M_data->_M_month09;
    __months[9] = _M_data->_M_month10;
    __months[10] = _M_data->_M_month11;
    __months[11] = _M_data->_M_month12;
      }

      void
      _M_months_abbreviated(const _CharT** __months) const
      {
    __months[0] = _M_data->_M_amonth01;
    __months[1] = _M_data->_M_amonth02;
    __months[2] = _M_data->_M_amonth03;
    __months[3] = _M_data->_M_amonth04;
    __months[4] = _M_data->_M_amonth05;
    __months[5] = _M_data->_M_amonth06;
    __months[6] = _M_data->_M_amonth07;
    __months[7] = _M_data->_M_amonth08;
    __months[8] = _M_data->_M_amonth09;
    __months[9] = _M_data->_M_amonth10;
    __months[10] = _M_data->_M_amonth11;
    __months[11] = _M_data->_M_amonth12;
      }

    protected:
      virtual
      ~__timepunct();

      // For use at construction time only.
      void
      _M_initialize_timepunct(__c_locale __cloc = NULL);
    };

  template<typename _CharT>
    locale::id __timepunct<_CharT>::id;

  // Specializations.
  template<>
    void
    __timepunct<char>::_M_initialize_timepunct(__c_locale __cloc);

  template<>
    void
    __timepunct<char>::_M_put(char*, size_t, const char*, const tm*) const;

#ifdef _GLIBCXX_USE_WCHAR_T
  template<>
    void
    __timepunct<wchar_t>::_M_initialize_timepunct(__c_locale __cloc);

  template<>
    void
    __timepunct<wchar_t>::_M_put(wchar_t*, size_t, const wchar_t*,
                 const tm*) const;
#endif

  // Include host and configuration specific timepunct functions.
  #include <bits/time_members.h>

  template<typename _CharT, typename _InIter>
    class time_get : public locale::facet, public time_base
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef _InIter           iter_type;
      typedef basic_string<_CharT>  __string_type;

      static locale::id         id;

      explicit
      time_get(size_t __refs = 0)
      : facet (__refs) { }

      dateorder
      date_order()  const
      { return this->do_date_order(); }

      iter_type
      get_time(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, tm* __tm)  const
      { return this->do_get_time(__beg, __end, __io, __err, __tm); }

      iter_type
      get_date(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, tm* __tm)  const
      { return this->do_get_date(__beg, __end, __io, __err, __tm); }

      iter_type
      get_weekday(iter_type __beg, iter_type __end, ios_base& __io,
          ios_base::iostate& __err, tm* __tm) const
      { return this->do_get_weekday(__beg, __end, __io, __err, __tm); }

      iter_type
      get_monthname(iter_type __beg, iter_type __end, ios_base& __io,
            ios_base::iostate& __err, tm* __tm) const
      { return this->do_get_monthname(__beg, __end, __io, __err, __tm); }

      iter_type
      get_year(iter_type __beg, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, tm* __tm) const
      { return this->do_get_year(__beg, __end, __io, __err, __tm); }

    protected:
      virtual
      ~time_get() { }

      virtual dateorder
      do_date_order() const;

      virtual iter_type
      do_get_time(iter_type __beg, iter_type __end, ios_base& __io,
          ios_base::iostate& __err, tm* __tm) const;

      virtual iter_type
      do_get_date(iter_type __beg, iter_type __end, ios_base& __io,
          ios_base::iostate& __err, tm* __tm) const;

      virtual iter_type
      do_get_weekday(iter_type __beg, iter_type __end, ios_base&,
             ios_base::iostate& __err, tm* __tm) const;

      virtual iter_type
      do_get_monthname(iter_type __beg, iter_type __end, ios_base&,
               ios_base::iostate& __err, tm* __tm) const;

      virtual iter_type
      do_get_year(iter_type __beg, iter_type __end, ios_base& __io,
          ios_base::iostate& __err, tm* __tm) const;

      // Extract numeric component of length __len.
      iter_type
      _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;

      // Extract day or month name, or any unique array of string
      // literals in a const _CharT* array.
      iter_type
      _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;

      // Extract on a component-by-component basis, via __format argument.
      iter_type
      _M_extract_via_format(iter_type __beg, iter_type __end, ios_base& __io,
                ios_base::iostate& __err, tm* __tm,
                const _CharT* __format) const;
    };

  template<typename _CharT, typename _InIter>
    locale::id time_get<_CharT, _InIter>::id;

  template<typename _CharT, typename _InIter>
    class time_get_byname : public time_get<_CharT, _InIter>
    {
    public:
      // Types:
      typedef _CharT            char_type;
      typedef _InIter           iter_type;

      explicit
      time_get_byname(const char*, size_t __refs = 0)
      : time_get<_CharT, _InIter>(__refs) { }

    protected:
      virtual
      ~time_get_byname() { }
    };

  template<typename _CharT, typename _OutIter>
    class time_put : public locale::facet
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef _OutIter          iter_type;

      static locale::id         id;

      explicit
      time_put(size_t __refs = 0)
      : facet(__refs) { }

      iter_type
      put(iter_type __s, ios_base& __io, char_type __fill, const tm* __tm,
      const _CharT* __beg, const _CharT* __end) const;

      iter_type
      put(iter_type __s, ios_base& __io, char_type __fill,
      const tm* __tm, char __format, char __mod = 0) const
      { return this->do_put(__s, __io, __fill, __tm, __format, __mod); }

    protected:
      virtual
      ~time_put()
      { }

      virtual iter_type
      do_put(iter_type __s, ios_base& __io, char_type __fill, const tm* __tm,
         char __format, char __mod) const;
    };

  template<typename _CharT, typename _OutIter>
    locale::id time_put<_CharT, _OutIter>::id;

  template<typename _CharT, typename _OutIter>
    class time_put_byname : public time_put<_CharT, _OutIter>
    {
    public:
      // Types:
      typedef _CharT            char_type;
      typedef _OutIter          iter_type;

      explicit
      time_put_byname(const char*, size_t __refs = 0)
      : time_put<_CharT, _OutIter>(__refs)
      { };

    protected:
      virtual
      ~time_put_byname() { }
    };


  class money_base
  {
  public:
    enum part { none, space, symbol, sign, value };
    struct pattern { char field[4]; };

    static const pattern _S_default_pattern;

    enum
    {
      _S_minus,
      _S_zero,
      _S_end = 11
    };

    // String literal of acceptable (narrow) input/output, for
    // money_get/money_put. "-0123456789"
    static const char* _S_atoms;

    // Construct and return valid pattern consisting of some combination of:
    // space none symbol sign value
    static pattern
    _S_construct_pattern(char __precedes, char __space, char __posn);
  };

  template<typename _CharT, bool _Intl>
    struct __moneypunct_cache : public locale::facet
    {
      const char*           _M_grouping;
      size_t                            _M_grouping_size;
      bool              _M_use_grouping;
      _CharT                _M_decimal_point;
      _CharT                _M_thousands_sep;
      const _CharT*         _M_curr_symbol;
      size_t                            _M_curr_symbol_size;
      const _CharT*         _M_positive_sign;
      size_t                            _M_positive_sign_size;
      const _CharT*         _M_negative_sign;
      size_t                            _M_negative_sign_size;
      int               _M_frac_digits;
      money_base::pattern       _M_pos_format;
      money_base::pattern           _M_neg_format;

      // A list of valid numeric literals for input and output: in the standard
      // "C" locale, this is "-0123456789". This array contains the chars after
      // having been passed through the current locale's ctype<_CharT>.widen().
      _CharT                _M_atoms[money_base::_S_end];

      bool              _M_allocated;

      __moneypunct_cache(size_t __refs = 0) : facet(__refs),
      _M_grouping(NULL), _M_grouping_size(0), _M_use_grouping(false),
      _M_decimal_point(_CharT()), _M_thousands_sep(_CharT()),
      _M_curr_symbol(NULL), _M_curr_symbol_size(0),
      _M_positive_sign(NULL), _M_positive_sign_size(0),
      _M_negative_sign(NULL), _M_negative_sign_size(0),
      _M_frac_digits(0),
      _M_pos_format(money_base::pattern()),
      _M_neg_format(money_base::pattern()), _M_allocated(false)
      { }

      ~__moneypunct_cache();

      void
      _M_cache(const locale& __loc);

    private:
      __moneypunct_cache&
      operator=(const __moneypunct_cache&);
      
      explicit
      __moneypunct_cache(const __moneypunct_cache&);
    };

  template<typename _CharT, bool _Intl>
    __moneypunct_cache<_CharT, _Intl>::~__moneypunct_cache()
    {
      if (_M_allocated)
    {
      delete [] _M_grouping;
      delete [] _M_curr_symbol;
      delete [] _M_positive_sign;
      delete [] _M_negative_sign;
    }
    }

  template<typename _CharT, bool _Intl>
    class moneypunct : public locale::facet, public money_base
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef basic_string<_CharT>  string_type;
      typedef __moneypunct_cache<_CharT, _Intl>     __cache_type;

    private:
      __cache_type*         _M_data;

    public:
      static const bool         intl = _Intl;
      static locale::id         id;

      explicit
      moneypunct(size_t __refs = 0) : facet(__refs), _M_data(NULL)
      { _M_initialize_moneypunct(); }

      explicit
      moneypunct(__cache_type* __cache, size_t __refs = 0)
      : facet(__refs), _M_data(__cache)
      { _M_initialize_moneypunct(); }

      explicit
      moneypunct(__c_locale __cloc, const char* __s, size_t __refs = 0)
      : facet(__refs), _M_data(NULL)
      { _M_initialize_moneypunct(__cloc, __s); }

      char_type
      decimal_point() const
      { return this->do_decimal_point(); }

      char_type
      thousands_sep() const
      { return this->do_thousands_sep(); }

      string
      grouping() const
      { return this->do_grouping(); }

      string_type
      curr_symbol() const
      { return this->do_curr_symbol(); }

      string_type
      positive_sign() const
      { return this->do_positive_sign(); }

      string_type
      negative_sign() const
      { return this->do_negative_sign(); }

      int
      frac_digits() const
      { return this->do_frac_digits(); }


      pattern
      pos_format() const
      { return this->do_pos_format(); }

      pattern
      neg_format() const
      { return this->do_neg_format(); }

    protected:
      virtual
      ~moneypunct();

      virtual char_type
      do_decimal_point() const
      { return _M_data->_M_decimal_point; }

      virtual char_type
      do_thousands_sep() const
      { return _M_data->_M_thousands_sep; }

      virtual string
      do_grouping() const
      { return _M_data->_M_grouping; }

      virtual string_type
      do_curr_symbol()   const
      { return _M_data->_M_curr_symbol; }

      virtual string_type
      do_positive_sign() const
      { return _M_data->_M_positive_sign; }

      virtual string_type
      do_negative_sign() const
      { return _M_data->_M_negative_sign; }

      virtual int
      do_frac_digits() const
      { return _M_data->_M_frac_digits; }

      virtual pattern
      do_pos_format() const
      { return _M_data->_M_pos_format; }

      virtual pattern
      do_neg_format() const
      { return _M_data->_M_neg_format; }

      // For use at construction time only.
       void
       _M_initialize_moneypunct(__c_locale __cloc = NULL,
                const char* __name = NULL);
    };

  template<typename _CharT, bool _Intl>
    locale::id moneypunct<_CharT, _Intl>::id;

  template<typename _CharT, bool _Intl>
    const bool moneypunct<_CharT, _Intl>::intl;

  template<>
    moneypunct<char, true>::~moneypunct();

  template<>
    moneypunct<char, false>::~moneypunct();

  template<>
    void
    moneypunct<char, true>::_M_initialize_moneypunct(__c_locale, const char*);

  template<>
    void
    moneypunct<char, false>::_M_initialize_moneypunct(__c_locale, const char*);

#ifdef _GLIBCXX_USE_WCHAR_T
  template<>
    moneypunct<wchar_t, true>::~moneypunct();

  template<>
    moneypunct<wchar_t, false>::~moneypunct();

  template<>
    void
    moneypunct<wchar_t, true>::_M_initialize_moneypunct(__c_locale,
                            const char*);

  template<>
    void
    moneypunct<wchar_t, false>::_M_initialize_moneypunct(__c_locale,
                             const char*);
#endif

  template<typename _CharT, bool _Intl>
    class moneypunct_byname : public moneypunct<_CharT, _Intl>
    {
    public:
      typedef _CharT            char_type;
      typedef basic_string<_CharT>  string_type;

      static const bool intl = _Intl;

      explicit
      moneypunct_byname(const char* __s, size_t __refs = 0)
      : moneypunct<_CharT, _Intl>(__refs)
      {
    if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
      {
        __c_locale __tmp;
        this->_S_create_c_locale(__tmp, __s);
        this->_M_initialize_moneypunct(__tmp);
        this->_S_destroy_c_locale(__tmp);
      }
      }

    protected:
      virtual
      ~moneypunct_byname() { }
    };

  template<typename _CharT, bool _Intl>
    const bool moneypunct_byname<_CharT, _Intl>::intl;

_GLIBCXX_BEGIN_LDBL_NAMESPACE
  template<typename _CharT, typename _InIter>
    class money_get : public locale::facet
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef _InIter           iter_type;
      typedef basic_string<_CharT>  string_type;

      static locale::id         id;

      explicit
      money_get(size_t __refs = 0) : facet(__refs) { }

      iter_type
      get(iter_type __s, iter_type __end, bool __intl, ios_base& __io,
      ios_base::iostate& __err, long double& __units) const
      { return this->do_get(__s, __end, __intl, __io, __err, __units); }

      iter_type
      get(iter_type __s, iter_type __end, bool __intl, ios_base& __io,
      ios_base::iostate& __err, string_type& __digits) const
      { return this->do_get(__s, __end, __intl, __io, __err, __digits); }

    protected:
      virtual
      ~money_get() { }

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      __do_get(iter_type __s, iter_type __end, bool __intl, ios_base& __io,
           ios_base::iostate& __err, double& __units) const;
#else
      virtual iter_type
      do_get(iter_type __s, iter_type __end, bool __intl, ios_base& __io,
         ios_base::iostate& __err, long double& __units) const;
#endif

      virtual iter_type
      do_get(iter_type __s, iter_type __end, bool __intl, ios_base& __io,
         ios_base::iostate& __err, string_type& __digits) const;

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      do_get(iter_type __s, iter_type __end, bool __intl, ios_base& __io,
         ios_base::iostate& __err, long double& __units) const;
#endif

      template<bool _Intl>
        iter_type
        _M_extract(iter_type __s, iter_type __end, ios_base& __io,
           ios_base::iostate& __err, string& __digits) const;     
    };

  template<typename _CharT, typename _InIter>
    locale::id money_get<_CharT, _InIter>::id;

  template<typename _CharT, typename _OutIter>
    class money_put : public locale::facet
    {
    public:

      typedef _CharT            char_type;
      typedef _OutIter          iter_type;
      typedef basic_string<_CharT>  string_type;

      static locale::id         id;

      explicit
      money_put(size_t __refs = 0) : facet(__refs) { }

      iter_type
      put(iter_type __s, bool __intl, ios_base& __io,
      char_type __fill, long double __units) const
      { return this->do_put(__s, __intl, __io, __fill, __units); }

      iter_type
      put(iter_type __s, bool __intl, ios_base& __io,
      char_type __fill, const string_type& __digits) const
      { return this->do_put(__s, __intl, __io, __fill, __digits); }

    protected:
      virtual
      ~money_put() { }

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      __do_put(iter_type __s, bool __intl, ios_base& __io, char_type __fill,
           double __units) const;
#else
      virtual iter_type
      do_put(iter_type __s, bool __intl, ios_base& __io, char_type __fill,
         long double __units) const;
#endif

      virtual iter_type
      do_put(iter_type __s, bool __intl, ios_base& __io, char_type __fill,
         const string_type& __digits) const;

      // XXX GLIBCXX_ABI Deprecated
#if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
      virtual iter_type
      do_put(iter_type __s, bool __intl, ios_base& __io, char_type __fill,
         long double __units) const;
#endif

      template<bool _Intl>
        iter_type
        _M_insert(iter_type __s, ios_base& __io, char_type __fill,
          const string_type& __digits) const;
    };

  template<typename _CharT, typename _OutIter>
    locale::id money_put<_CharT, _OutIter>::id;

_GLIBCXX_END_LDBL_NAMESPACE

  struct messages_base
  {
    typedef int catalog;
  };

  template<typename _CharT>
    class messages : public locale::facet, public messages_base
    {
    public:
      // Types:

      typedef _CharT            char_type;
      typedef basic_string<_CharT>  string_type;

    protected:
      // Underlying "C" library locale information saved from
      // initialization, needed by messages_byname as well.
      __c_locale            _M_c_locale_messages;
      const char*           _M_name_messages;

    public:
      static locale::id         id;

      explicit
      messages(size_t __refs = 0);

      // Non-standard.
      explicit
      messages(__c_locale __cloc, const char* __s, size_t __refs = 0);

      /*
       *  @brief  Open a message catalog.
       *
       *  This function opens and returns a handle to a message catalog by
       *  returning do_open(s, loc).
       *
       *  @param  s  The catalog to open.
       *  @param  loc  Locale to use for character set conversions.
       *  @return  Handle to the catalog or value < 0 if open fails.
      */
      catalog
      open(const basic_string<char>& __s, const locale& __loc) const
      { return this->do_open(__s, __loc); }

      // Non-standard and unorthodox, yet effective.
      /*
       *  @brief  Open a message catalog.
       *
       *  This non-standard function opens and returns a handle to a message
       *  catalog by returning do_open(s, loc).  The third argument provides a
       *  message catalog root directory for gnu gettext and is ignored
       *  otherwise.
       *
       *  @param  s  The catalog to open.
       *  @param  loc  Locale to use for character set conversions.
       *  @param  dir  Message catalog root directory.
       *  @return  Handle to the catalog or value < 0 if open fails.
      */
      catalog
      open(const basic_string<char>&, const locale&, const char*) const;

      /*
       *  @brief  Look up a string in a message catalog.
       *
       *  This function retrieves and returns a message from a catalog by
       *  returning do_get(c, set, msgid, s).
       *
       *  For gnu, @a set and @a msgid are ignored.  Returns gettext(s).
       *  For default, returns s. For ieee, returns catgets(c,set,msgid,s).
       *
       *  @param  c  The catalog to access.
       *  @param  set  Implementation-defined.
       *  @param  msgid  Implementation-defined.
       *  @param  s  Default return value if retrieval fails.
       *  @return  Retrieved message or @a s if get fails.
      */
      string_type
      get(catalog __c, int __set, int __msgid, const string_type& __s) const
      { return this->do_get(__c, __set, __msgid, __s); }

      /*
       *  @brief  Close a message catalog.
       *
       *  Closes catalog @a c by calling do_close(c).
       *
       *  @param  c  The catalog to close.
      */
      void
      close(catalog __c) const
      { return this->do_close(__c); }

    protected:
      virtual
      ~messages();

      /*
       *  @brief  Open a message catalog.
       *
       *  This function opens and returns a handle to a message catalog in an
       *  implementation-defined manner.  This function is a hook for derived
       *  classes to change the value returned.
       *
       *  @param  s  The catalog to open.
       *  @param  loc  Locale to use for character set conversions.
       *  @return  Handle to the opened catalog, value < 0 if open failed.
      */
      virtual catalog
      do_open(const basic_string<char>&, const locale&) const;

      /*
       *  @brief  Look up a string in a message catalog.
       *
       *  This function retrieves and returns a message from a catalog in an
       *  implementation-defined manner.  This function is a hook for derived
       *  classes to change the value returned.
       *
       *  For gnu, @a set and @a msgid are ignored.  Returns gettext(s).
       *  For default, returns s. For ieee, returns catgets(c,set,msgid,s).
       *
       *  @param  c  The catalog to access.
       *  @param  set  Implementation-defined.
       *  @param  msgid  Implementation-defined.
       *  @param  s  Default return value if retrieval fails.
       *  @return  Retrieved message or @a s if get fails.
      */
      virtual string_type
      do_get(catalog, int, int, const string_type& __dfault) const;

      /*
       *  @brief  Close a message catalog.
       *
       *  @param  c  The catalog to close.
      */
      virtual void
      do_close(catalog) const;

      // Returns a locale and codeset-converted string, given a char* message.
      char*
      _M_convert_to_char(const string_type& __msg) const
      {
    // XXX
    return reinterpret_cast<char*>(const_cast<_CharT*>(__msg.c_str()));
      }

      // Returns a locale and codeset-converted string, given a char* message.
      string_type
      _M_convert_from_char(char*) const
      {
#if 0
    // Length of message string without terminating null.
    size_t __len = char_traits<char>::length(__msg) - 1;

    // "everybody can easily convert the string using
    // mbsrtowcs/wcsrtombs or with iconv()"

    // Convert char* to _CharT in locale used to open catalog.
    // XXX need additional template parameter on messages class for this..
    // typedef typename codecvt<char, _CharT, _StateT> __codecvt_type;
    typedef typename codecvt<char, _CharT, mbstate_t> __codecvt_type;

    __codecvt_type::state_type __state;
    // XXX may need to initialize state.
    //initialize_state(__state._M_init());

    char* __from_next;
    // XXX what size for this string?
    _CharT* __to = static_cast<_CharT*>(__builtin_alloca(__len + 1));
    const __codecvt_type& __cvt = use_facet<__codecvt_type>(_M_locale_conv);
    __cvt.out(__state, __msg, __msg + __len, __from_next,
          __to, __to + __len + 1, __to_next);
    return string_type(__to);
#endif
#if 0
    typedef ctype<_CharT> __ctype_type;
    // const __ctype_type& __cvt = use_facet<__ctype_type>(_M_locale_msg);
    const __ctype_type& __cvt = use_facet<__ctype_type>(locale());
    // XXX Again, proper length of converted string an issue here.
    // For now, assume the converted length is not larger.
    _CharT* __dest = static_cast<_CharT*>(__builtin_alloca(__len + 1));
    __cvt.widen(__msg, __msg + __len, __dest);
    return basic_string<_CharT>(__dest);
#endif
    return string_type();
      }
     };

  template<typename _CharT>
    locale::id messages<_CharT>::id;

  // Specializations for required instantiations.
  template<>
    string
    messages<char>::do_get(catalog, int, int, const string&) const;

#ifdef _GLIBCXX_USE_WCHAR_T
  template<>
    wstring
    messages<wchar_t>::do_get(catalog, int, int, const wstring&) const;
#endif

   template<typename _CharT>
    class messages_byname : public messages<_CharT>
    {
    public:
      typedef _CharT            char_type;
      typedef basic_string<_CharT>  string_type;

      explicit
      messages_byname(const char* __s, size_t __refs = 0);

    protected:
      virtual
      ~messages_byname()
      { }
    };

  // Include host and configuration specific messages functions.
  #include <bits/messages_members.h>


  // Subclause convenience interfaces, inlines.
  // NB: These are inline because, when used in a loop, some compilers
  // can hoist the body out of the loop; then it's just as fast as the
  // C is*() function.

  template<typename _CharT>
    inline bool
    isspace(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::space, __c); }

  template<typename _CharT>
    inline bool
    isprint(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::print, __c); }

  template<typename _CharT>
    inline bool
    iscntrl(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::cntrl, __c); }

  template<typename _CharT>
    inline bool
    isupper(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::upper, __c); }

  template<typename _CharT>
    inline bool 
    islower(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::lower, __c); }

  template<typename _CharT>
    inline bool
    isalpha(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::alpha, __c); }

  template<typename _CharT>
    inline bool
    isdigit(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::digit, __c); }

  template<typename _CharT>
    inline bool
    ispunct(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::punct, __c); }

  template<typename _CharT>
    inline bool
    isxdigit(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::xdigit, __c); }

  template<typename _CharT>
    inline bool
    isalnum(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::alnum, __c); }

  template<typename _CharT>
    inline bool
    isgraph(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).is(ctype_base::graph, __c); }

  template<typename _CharT>
    inline _CharT
    toupper(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).toupper(__c); }

  template<typename _CharT>
    inline _CharT
    tolower(_CharT __c, const locale& __loc)
    { return use_facet<ctype<_CharT> >(__loc).tolower(__c); }
} // namespace std

#endif

---