ios_base.h

俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）的全部源代码。

    locale 		_M_ios_locale;

    void 
    _M_init();

  public:

    // 27.4.2.1.6  Class ios_base::Init
    // Used to initialize standard streams. In theory, g++ could use
    // -finit-priority to order this stuff correctly without going
    // through these machinations. 
    class Init 
    {
      friend class ios_base;
    public:
      Init();
      ~Init();
      
      static void
      _S_ios_create(bool __sync);
      
      static void
      _S_ios_destroy();

      // NB: Allows debugger applications use of the standard streams
      // from operator new. _S_ios_base_init must be incremented in
      // _S_ios_create _after_ initialization is completed.
      static bool
      _S_initialized() { return _S_ios_base_init; }

    private:
      static int 	_S_ios_base_init;
      static bool	_S_synced_with_stdio;
    };

    // [27.4.2.2] fmtflags state functions
    /**
     *  @brief  Access to format flags.
     *  @return  The format control flags for both input and output.
    */
    inline fmtflags 
    flags() const { return _M_flags; }

    /**
     *  @brief  Setting new format flags all at once.
     *  @param  fmtfl  The new flags to set.
     *  @return  The previous format control flags.
     *
     *  This function overwrites all the format flags with @a fmtfl.
    */
    inline fmtflags 
    flags(fmtflags __fmtfl)
    { 
      fmtflags __old = _M_flags; 
      _M_flags = __fmtfl; 
      return __old; 
    }

    /**
     *  @brief  Setting new format flags.
     *  @param  fmtfl  Additional flags to set.
     *  @return  The previous format control flags.
     *
     *  This function sets additional flags in format control.  Flags that
     *  were previously set remain set.
    */
    inline fmtflags 
    setf(fmtflags __fmtfl)
    { 
      fmtflags __old = _M_flags; 
      _M_flags |= __fmtfl; 
      return __old; 
    }

    /**
     *  @brief  Setting new format flags.
     *  @param  fmtfl  Additional flags to set.
     *  @param  mask  The flags mask for @a fmtfl.
     *  @return  The previous format control flags.
     *
     *  This function clears @a mask in the format flags, then sets
     *  @a fmtfl @c & @a mask.  An example mask is @c ios_base::adjustfield.
    */
    inline fmtflags 
    setf(fmtflags __fmtfl, fmtflags __mask)
    {
      fmtflags __old = _M_flags;
      _M_flags &= ~__mask;
      _M_flags |= (__fmtfl & __mask);
      return __old;
    }

    /**
     *  @brief  Clearing format flags.
     *  @param  mask  The flags to unset.
     *
     *  This function clears @a mask in the format flags.
    */
    inline void 
    unsetf(fmtflags __mask) { _M_flags &= ~__mask; }

    /**
     *  @brief  Flags access.
     *  @return  The precision to generate on certain output operations.
     *
     *  @if maint
     *  Be careful if you try to give a definition of "precision" here; see
     *  DR 189.
     *  @endif
    */
    inline streamsize 
    precision() const { return _M_precision; }

    /**
     *  @brief  Changing flags.
     *  @param  prec  The new precision value.
     *  @return  The previous value of precision().
    */
    inline streamsize 
    precision(streamsize __prec)
    { 
      streamsize __old = _M_precision; 
      _M_precision = __prec; 
      return __old; 
    }

    /**
     *  @brief  Flags access.
     *  @return  The minimum field width to generate on output operations.
     *
     *  "Minimum field width" refers to the number of characters.
    */
    inline streamsize 
    width() const { return _M_width; }

    /**
     *  @brief  Changing flags.
     *  @param  wide  The new width value.
     *  @return  The previous value of width().
    */
    inline streamsize 
    width(streamsize __wide)
    { 
      streamsize __old = _M_width; 
      _M_width = __wide; 
      return __old; 
    }

    // [27.4.2.4] ios_base static members
    /**
     *  @brief  Interaction with the standard C I/O objects.
     *  @param  sync  Whether to synchronize or not.
     *  @return  True if the standard streams were previously synchronized.
     *
     *  The synchronization referred to is @e only that between the standard
     *  C facilities (e.g., stdout) and the standard C++ objects (e.g.,
     *  cout).  User-declared streams are unaffected.  See
     *  http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#8 for more.
    */
    static bool 
    sync_with_stdio(bool __sync = true);

    // [27.4.2.3] ios_base locale functions
    /**
     *  @brief  Setting a new locale.
     *  @param  loc  The new locale.
     *  @return  The previous locale.
     *
     *  Sets the new locale for this stream, and
     *  [XXX does something with callbacks].
    */
    locale 
    imbue(const locale& __loc);

    /**
     *  @brief  Locale access
     *  @return  A copy of the current locale.
     *
     *  If @c imbue(loc) has previously been called, then this function
     *  returns @c loc.  Otherwise, it returns a copy of @c std::locale(),
     *  the global C++ locale.
    */
    inline locale 
    getloc() const { return _M_ios_locale; }

    /**
     *  @brief  Locale access
     *  @return  A reference to the current locale.
     *
     *  Like getloc above, but returns a reference instead of
     *  generating a copy.
    */
    inline const locale& 
    _M_getloc() const { return _M_ios_locale; }

    // [27.4.2.5] ios_base storage functions
    /**
     *  @doctodo
    */
    static int 
    xalloc() throw();

    /**
     *  @doctodo
    */
    inline long& 
    iword(int __ix)
    {
      _Words& __word = (__ix < _M_word_size) 
			? _M_word[__ix] : _M_grow_words(__ix);
      return __word._M_iword;
    }

    /**
     *  @doctodo
    */
    inline void*& 
    pword(int __ix)
    {
      _Words& __word = (__ix < _M_word_size) 
			? _M_word[__ix] : _M_grow_words(__ix);
      return __word._M_pword;
    }

    // Destructor
    /**
     *  Destroys local storage and
     *  [XXX does something with callbacks].
    */
    ~ios_base();

  protected:
    ios_base();

#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
  //50.  Copy constructor and assignment operator of ios_base
  private:
    ios_base(const ios_base&);

    ios_base& 
    operator=(const ios_base&);
#endif
  };
 
  // [27.4.5.1] fmtflags manipulators
  /// Calls base.setf(ios_base::boolalpha).
  inline ios_base& 
  boolalpha(ios_base& __base)
  {
    __base.setf(ios_base::boolalpha);
    return __base;
  }

  /// Calls base.unsetf(ios_base::boolalpha).
  inline ios_base& 
  noboolalpha(ios_base& __base)
  {
    __base.unsetf(ios_base::boolalpha);
    return __base;
  }

  /// Calls base.setf(ios_base::showbase).
  inline ios_base& 
  showbase(ios_base& __base)
  {
    __base.setf(ios_base::showbase);
    return __base;
  }

  /// Calls base.unsetf(ios_base::showbase).
  inline ios_base& 
  noshowbase(ios_base& __base)
  {
    __base.unsetf(ios_base::showbase);
    return __base;
  }

  /// Calls base.setf(ios_base::showpoint).
  inline ios_base& 
  showpoint(ios_base& __base)
  {
    __base.setf(ios_base::showpoint);
    return __base;
  }

  /// Calls base.unsetf(ios_base::showpoint).
  inline ios_base& 
  noshowpoint(ios_base& __base)
  {
    __base.unsetf(ios_base::showpoint);
    return __base;
  }

  /// Calls base.setf(ios_base::showpos).
  inline ios_base& 
  showpos(ios_base& __base)
  {
    __base.setf(ios_base::showpos);
    return __base;
  }

  /// Calls base.unsetf(ios_base::showpos).
  inline ios_base& 
  noshowpos(ios_base& __base)
  {
    __base.unsetf(ios_base::showpos);
    return __base;
  }

  /// Calls base.setf(ios_base::skipws).
  inline ios_base& 
  skipws(ios_base& __base)
  {
    __base.setf(ios_base::skipws);
    return __base;
  }
  
  /// Calls base.unsetf(ios_base::skipws).
  inline ios_base& 
  noskipws(ios_base& __base)
  {
    __base.unsetf(ios_base::skipws);
    return __base;
  }

  /// Calls base.setf(ios_base::uppercase).
  inline ios_base& 
  uppercase(ios_base& __base)
  {
    __base.setf(ios_base::uppercase);
    return __base;
  }

  /// Calls base.unsetf(ios_base::uppercase).
  inline ios_base& 
  nouppercase(ios_base& __base)
  {
    __base.unsetf(ios_base::uppercase);
    return __base;
  }

  /// Calls base.setf(ios_base::unitbuf).
  inline ios_base& 
  unitbuf(ios_base& __base)
  {
     __base.setf(ios_base::unitbuf);      
     return __base;
  }

  /// Calls base.unsetf(ios_base::unitbuf).
  inline ios_base& 
  nounitbuf(ios_base& __base)
  {
     __base.unsetf(ios_base::unitbuf);
     return __base;    
  }

  // [27.4.5.2] adjustfield anipulators
  /// Calls base.setf(ios_base::internal, ios_base::adjustfield).
  inline ios_base& 
  internal(ios_base& __base)
  {
     __base.setf(ios_base::internal, ios_base::adjustfield);
     return __base;    
  }

  /// Calls base.setf(ios_base::left, ios_base::adjustfield).
  inline ios_base& 
  left(ios_base& __base)
  {
    __base.setf(ios_base::left, ios_base::adjustfield);
    return __base;
  }
  
  /// Calls base.setf(ios_base::right, ios_base::adjustfield).
  inline ios_base& 
  right(ios_base& __base)
  {
    __base.setf(ios_base::right, ios_base::adjustfield);
    return __base;
  }
  
  // [27.4.5.3] basefield anipulators
  /// Calls base.setf(ios_base::dec, ios_base::basefield).
  inline ios_base& 
  dec(ios_base& __base)
  {
    __base.setf(ios_base::dec, ios_base::basefield);
    return __base;
  }
  
  /// Calls base.setf(ios_base::hex, ios_base::basefield).
  inline ios_base& 
  hex(ios_base& __base)
  {
    __base.setf(ios_base::hex, ios_base::basefield);
    return __base;
  }

  /// Calls base.setf(ios_base::oct, ios_base::basefield).
  inline ios_base& 
  oct(ios_base& __base)
  {
    __base.setf(ios_base::oct, ios_base::basefield);
    return __base;
  }
  
  // [27.4.5.4] floatfield anipulators
  /// Calls base.setf(ios_base::fixed, ios_base::floatfield).
  inline ios_base& 
  fixed(ios_base& __base)
  {
    __base.setf(ios_base::fixed, ios_base::floatfield);
    return __base;
  }

  /// Calls base.setf(ios_base::scientific, ios_base::floatfield).
  inline ios_base& 
  scientific(ios_base& __base)
  {
    __base.setf(ios_base::scientific, ios_base::floatfield);
    return __base;
  }

} // namespace std

#endif /* _CPP_BITS_IOSBASE_H */