Provided by: libstdc++6-4.5-doc_4.5.3-12ubuntu2_all bug

NAME

       __gnu_cxx::enc_filebuf< _CharT > -

SYNOPSIS

       Inherits std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >.

   Public Types
       typedef codecvt< char_type,
           char, __state_type > __codecvt_type"
       typedef __basic_file< char > __file_type
       typedef basic_filebuf
           < char_type, traits_type > __filebuf_type"
       typedef traits_type::state_type __state_type
       typedef basic_streambuf
           < char_type, traits_type > __streambuf_type"
       typedef _CharT char_type
       typedef traits_type::int_type int_type
       typedef traits_type::off_type off_type
       typedef traits_type::pos_type pos_type
       typedef traits_type::state_type state_type
       typedef encoding_char_traits
           < _CharT > traits_type"

   Public Member Functions
       enc_filebuf (state_type &__state)
       __filebuf_type * close ()
       streamsize in_avail ()
       bool is_open () const  throw ()
       __filebuf_type * open (const char *__s, ios_base::openmode __mode)
       __filebuf_type * open (const std::string &__s, ios_base::openmode __mode)
       int_type sbumpc ()
       int_type sgetc ()
       streamsize sgetn (char_type *__s, streamsize __n)
       int_type snextc ()
       int_type sputbackc (char_type __c)
       int_type sputc (char_type __c)
       streamsize sputn (const char_type *__s, streamsize __n)
       void stossc ()
       int_type sungetc ()

   Protected Member Functions
       void _M_allocate_internal_buffer ()
       bool _M_convert_to_external (char_type *, streamsize)
       void _M_create_pback ()
       void _M_destroy_internal_buffer ()  throw ()
       void _M_destroy_pback ()  throw ()
       pos_type _M_seek (off_type __off, ios_base::seekdir __way, __state_type __state)
       void _M_set_buffer (streamsize __off)
       bool _M_terminate_output ()
       void gbump (int __n)
       virtual void imbue (const locale &__loc)
       virtual int_type overflow (int_type __c=encoding_char_traits< _CharT >::eof())
       virtual int_type pbackfail (int_type __c=encoding_char_traits< _CharT >::eof())
       void pbump (int __n)
       virtual pos_type seekoff (off_type __off, ios_base::seekdir __way, ios_base::openmode
           __mode=ios_base::in|ios_base::out)
       virtual pos_type seekpos (pos_type __pos, ios_base::openmode
           __mode=ios_base::in|ios_base::out)
       virtual __streambuf_type * setbuf (char_type *__s, streamsize __n)
       void setg (char_type *__gbeg, char_type *__gnext, char_type *__gend)
       void setp (char_type *__pbeg, char_type *__pend)
       virtual streamsize showmanyc ()
       virtual int sync ()
       virtual int_type uflow ()
       virtual int_type underflow ()
       virtual streamsize xsgetn (char_type *__s, streamsize __n)
       virtual streamsize xsputn (const char_type *__s, streamsize __n)

           char_type * eback () const
           char_type * gptr () const
           char_type * egptr () const

           char_type * pbase () const
           char_type * pptr () const
           char_type * epptr () const

   Protected Attributes
       char_type * _M_buf
       bool _M_buf_allocated
       size_t _M_buf_size
       const __codecvt_type * _M_codecvt
       char * _M_ext_buf
       streamsize _M_ext_buf_size
       char * _M_ext_end
       const char * _M_ext_next
       __file_type _M_file
       __c_lock _M_lock
       ios_base::openmode _M_mode
       bool _M_reading
       __state_type _M_state_beg
       __state_type _M_state_cur
       __state_type _M_state_last
       bool _M_writing

           char_type _M_pback
           char_type * _M_pback_cur_save
           char_type * _M_pback_end_save
           bool _M_pback_init

   Friends
       __gnu_cxx::__enable_if
           < __is_char< _CharT2 >
           ::__value, _CharT2 * >::__type __copy_move_a2 (istreambuf_iterator< _CharT2 >,
           istreambuf_iterator< _CharT2 >, _CharT2 *)"
       streamsize __copy_streambufs_eof (__streambuf_type *, __streambuf_type *, bool &)
       class basic_ios< char_type, traits_type >
       class basic_istream< char_type, traits_type >
       class basic_ostream< char_type, traits_type >
       __gnu_cxx::__enable_if
           < __is_char< _CharT2 >
           ::__value, istreambuf_iterator
           < _CharT2 > >::__type find (istreambuf_iterator< _CharT2 >, istreambuf_iterator<
           _CharT2 >, const _CharT2 &)"
       basic_istream< _CharT2,
           _Traits2 > & getline (basic_istream< _CharT2, _Traits2 > &, basic_string< _CharT2,
           _Traits2, _Alloc > &, _CharT2)"
       class ios_base
       class istreambuf_iterator< char_type, traits_type >
       basic_istream< _CharT2,
           _Traits2 > & operator>> (basic_istream< _CharT2, _Traits2 > &, _CharT2 *)"
       basic_istream< _CharT2,
           _Traits2 > & operator>> (basic_istream< _CharT2, _Traits2 > &, basic_string< _CharT2,
           _Traits2, _Alloc > &)"
       class ostreambuf_iterator< char_type, traits_type >
       locale pubimbue (const locale &__loc)
       locale getloc () const
       __streambuf_type * pubsetbuf (char_type *__s, streamsize __n)
       pos_type pubseekoff (off_type __off, ios_base::seekdir __way, ios_base::openmode
           __mode=ios_base::in|ios_base::out)
       pos_type pubseekpos (pos_type __sp, ios_base::openmode __mode=ios_base::in|ios_base::out)
       int pubsync ()
       char_type * _M_in_beg
       char_type * _M_in_cur
       char_type * _M_in_end
       char_type * _M_out_beg
       char_type * _M_out_cur
       char_type * _M_out_end
       locale _M_buf_locale

Detailed Description

   template<typename _CharT>class __gnu_cxx::enc_filebuf< _CharT >
       class enc_filebuf.

       Definition at line 40 of file enc_filebuf.h.

Member Typedef Documentation

   typedef basic_streambuf<char_type, traits_type> std::basic_filebuf< _CharT,
       encoding_char_traits< _CharT >  >::__streambuf_type [inherited]
       This is a non-standard type.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

       Definition at line 77 of file fstream.

   typedef _CharT std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::char_type
       [inherited] These are standard types. They permit a standardized way of referring to names
       of (or names dependant on) the template parameters, which are specific to the
       implementation.
       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

       Definition at line 71 of file fstream.

   typedef traits_type::int_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >
       >::int_type [inherited] These are standard types. They permit a standardized way of
       referring to names of (or names dependant on) the template parameters, which are specific
       to the implementation.
       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

       Definition at line 73 of file fstream.

   typedef traits_type::off_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >
       >::off_type [inherited] These are standard types. They permit a standardized way of
       referring to names of (or names dependant on) the template parameters, which are specific
       to the implementation.
       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

       Definition at line 75 of file fstream.

   template<typename _CharT > typedef traits_type::pos_type __gnu_cxx::enc_filebuf< _CharT
       >::pos_type These are standard types. They permit a standardized way of referring to names
       of (or names dependant on) the template parameters, which are specific to the
       implementation.
       Reimplemented from std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >.

       Definition at line 46 of file enc_filebuf.h.

   template<typename _CharT > typedef encoding_char_traits<_CharT> __gnu_cxx::enc_filebuf< _CharT
       >::traits_type These are standard types. They permit a standardized way of referring to
       names of (or names dependant on) the template parameters, which are specific to the
       implementation.
       Reimplemented from std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >.

       Definition at line 44 of file enc_filebuf.h.

Member Function Documentation

   void std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_create_pback ()
       [inline, protected, inherited] Initializes pback buffers, and moves normal buffers to
       safety. Assumptions: _M_in_cur has already been moved back
       Definition at line 172 of file fstream.

   void std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_destroy_pback ()  throw
       () [inline, protected, inherited] Deactivates pback buffer contents, and restores normal
       buffer. Assumptions: The pback buffer has only moved forward.
       Definition at line 189 of file fstream.

   void std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_set_buffer
       (streamsize__off) [inline, protected, inherited] This function sets the pointers of the
       internal buffer, both get and put areas. Typically:
       __off == egptr() - eback() upon underflow/uflow (read mode); __off == 0 upon overflow
       (write mode); __off == -1 upon open, setbuf, seekoff/pos (uncommitted mode).

       NB: epptr() - pbase() == _M_buf_size - 1, since _M_buf_size reflects the actual allocated
       memory and the last cell is reserved for the overflow char of a full put area.

       Definition at line 387 of file fstream.

   __filebuf_type* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::close ()
       [inherited]
       Closes the currently associated file. Returns:
           this on success, NULL on failure

       If no file is currently open, this function immediately fails.

       If a put buffer area exists, overflow(eof) is called to flush all the characters. The file
       is then closed.

       If any operations fail, this function also fails.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::eback () const
       [inline, protected, inherited]
       Access to the get area. These functions are only available to other protected functions,
       including derived classes.

       · eback() returns the beginning pointer for the input sequence

       · gptr() returns the next pointer for the input sequence

       · egptr() returns the end pointer for the input sequence

       Definition at line 460 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::egptr () const
       [inline, protected, inherited]
       Access to the get area. These functions are only available to other protected functions,
       including derived classes.

       · eback() returns the beginning pointer for the input sequence

       · gptr() returns the next pointer for the input sequence

       · egptr() returns the end pointer for the input sequence

       Definition at line 466 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::epptr () const
       [inline, protected, inherited]
       Access to the put area. These functions are only available to other protected functions,
       including derived classes.

       · pbase() returns the beginning pointer for the output sequence

       · pptr() returns the next pointer for the output sequence

       · epptr() returns the end pointer for the output sequence

       Definition at line 513 of file streambuf.

   void std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::gbump (int__n) [inline,
       protected, inherited]
       Moving the read position. Parameters:
           n The delta by which to move.

       This just advances the read position without returning any data.

       Definition at line 476 of file streambuf.

   locale std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::getloc () const
       [inline, inherited]
       Locale access. Returns:
           The current locale in effect.

       If pubimbue(loc) has been called, then the most recent loc is returned. Otherwise the
       global locale in effect at the time of construction is returned.

       Definition at line 222 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::gptr () const
       [inline, protected, inherited]
       Access to the get area. These functions are only available to other protected functions,
       including derived classes.

       · eback() returns the beginning pointer for the input sequence

       · gptr() returns the next pointer for the input sequence

       · egptr() returns the end pointer for the input sequence

       Definition at line 463 of file streambuf.

   virtual void std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::imbue (const
       locale &) [protected, virtual, inherited]
       Changes translations. Parameters:
           loc A new locale.

       Translations done during I/O which depend on the current locale are changed by this call.
       The standard adds, Between invocations of this function a class derived from streambuf can
       safely cache results of calls to locale functions and to members of facets so obtained.

       Note:
           Base class version does nothing.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   streamsize std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::in_avail ()
       [inline, inherited]
       Looking ahead into the stream. Returns:
           The number of characters available.

       If a read position is available, returns the number of characters available for reading
       before the buffer must be refilled. Otherwise returns the derived showmanyc().

       Definition at line 262 of file streambuf.

   bool std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::is_open () const  throw ()
       [inline, inherited]
       Returns true if the external file is open.

       Definition at line 222 of file fstream.

   __filebuf_type* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::open (const
       char *__s, ios_base::openmode__mode) [inherited]
       Opens an external file. Parameters:
           s The name of the file.
           mode The open mode flags.

       Returns:
           this on success, NULL on failure

       If a file is already open, this function immediately fails. Otherwise it tries to open the
       file named s using the flags given in mode.

       Table 92, adapted here, gives the relation between openmode combinations and the
       equivalent fopen() flags. (NB: lines app, in|out|app, in|app, binary|app,
       binary|in|out|app, and binary|in|app per DR 596)
       +---------------------------------------------------------+ | ios_base Flag combination
       stdio equivalent | |binary in out trunc app |
       +---------------------------------------------------------+ | + w | | + + a | | + a | | +
       + w | | + r | | + + r+ | | + + + w+ | | + + + a+ | | + + a+ |
       +---------------------------------------------------------+ | + + wb | | + + + ab | | + +
       ab | | + + + wb | | + + rb | | + + + r+b | | + + + + w+b | | + + + + a+b | | + + + a+b |
       +---------------------------------------------------------+

   __filebuf_type* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::open (const
       std::string &__s, ios_base::openmode__mode) [inline, inherited]
       Opens an external file. Parameters:
           s The name of the file.
           mode The open mode flags.

       Returns:
           this on success, NULL on failure

       Definition at line 275 of file fstream.

   virtual int_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::overflow
       (int_type = _Traits::eof()) [protected, virtual, inherited]
       Consumes data from the buffer; writes to the controlled sequence. Parameters:
           c An additional character to consume.

       Returns:
           eof() to indicate failure, something else (usually c, or not_eof())

       Informally, this function is called when the output buffer is full (or does not exist, as
       buffering need not actually be done). If a buffer exists, it is consumed, with some effect
       on the controlled sequence. (Typically, the buffer is written out to the sequence
       verbatim.) In either case, the character c is also written out, if c is not eof().

       For a formal definition of this function, see a good text such as Langer & Kreft, or
       [27.5.2.4.5]/3-7.

       A functioning output streambuf can be created by overriding only this function (no buffer
       area will be used).

       Note:
           Base class version does nothing, returns eof().

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   virtual int_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::pbackfail
       (int_type = _Traits::eof()) [protected, virtual, inherited]
       Tries to back up the input sequence. Parameters:
           c The character to be inserted back into the sequence.

       Returns:
           eof() on failure, some other value on success

       Postcondition:
           The constraints of gptr(), eback(), and pptr() are the same as for underflow().

       Note:
           Base class version does nothing, returns eof().

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pbase () const
       [inline, protected, inherited]
       Access to the put area. These functions are only available to other protected functions,
       including derived classes.

       · pbase() returns the beginning pointer for the output sequence

       · pptr() returns the next pointer for the output sequence

       · epptr() returns the end pointer for the output sequence

       Definition at line 507 of file streambuf.

   void std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pbump (int__n) [inline,
       protected, inherited]
       Moving the write position. Parameters:
           n The delta by which to move.

       This just advances the write position without returning any data.

       Definition at line 523 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pptr () const
       [inline, protected, inherited]
       Access to the put area. These functions are only available to other protected functions,
       including derived classes.

       · pbase() returns the beginning pointer for the output sequence

       · pptr() returns the next pointer for the output sequence

       · epptr() returns the end pointer for the output sequence

       Definition at line 510 of file streambuf.

   locale std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pubimbue (const locale
       &__loc) [inline, inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 205 of file streambuf.

   pos_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pubseekoff
       (off_type__off, ios_base::seekdir__way, ios_base::openmode__mode = ios_base::in |
       ios_base::out) [inline, inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 239 of file streambuf.

   pos_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pubseekpos
       (pos_type__sp, ios_base::openmode__mode = ios_base::in | ios_base::out) [inline,
       inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 244 of file streambuf.

   __streambuf_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pubsetbuf
       (char_type *__s, streamsize__n) [inline, inherited]
       Entry points for derived buffer functions. The public versions of pubfoo dispatch to the
       protected derived foo member functions, passing the arguments (if any) and returning the
       result unchanged.

       Definition at line 235 of file streambuf.

   int std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::pubsync () [inline,
       inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 249 of file streambuf.

   int_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::sbumpc () [inline,
       inherited]
       Getting the next character. Returns:
           The next character, or eof.

       If the input read position is available, returns that character and increments the read
       pointer, otherwise calls and returns uflow().

       Definition at line 294 of file streambuf.

   virtual pos_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::seekoff
       (off_type, ios_base::seekdir, ios_base::openmode = ios_base::in | ios_base::out)
       [protected, virtual, inherited]
       Alters the stream positions. Each derived class provides its own appropriate behavior.

       Note:
           Base class version does nothing, returns a pos_type that represents an invalid stream
           position.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   virtual pos_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::seekpos
       (pos_type, ios_base::openmode = ios_base::in | ios_base::out) [protected, virtual,
       inherited]
       Alters the stream positions. Each derived class provides its own appropriate behavior.

       Note:
           Base class version does nothing, returns a pos_type that represents an invalid stream
           position.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   virtual __streambuf_type* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >
       >::setbuf (char_type *__s, streamsize__n) [protected, virtual, inherited]
       Manipulates the buffer. Parameters:
           s Pointer to a buffer area.
           n Size of s.

       Returns:
           this

       If no file has been opened, and both s and n are zero, then the stream becomes unbuffered.
       Otherwise, s is used as a buffer; see
       http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25s02.html for more.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   void std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::setg (char_type *__gbeg,
       char_type *__gnext, char_type *__gend) [inline, protected, inherited]
       Setting the three read area pointers. Parameters:
           gbeg A pointer.
           gnext A pointer.
           gend A pointer.

       Postcondition:
           gbeg == eback(), gnext == gptr(), and gend == egptr()

       Definition at line 487 of file streambuf.

   void std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::setp (char_type *__pbeg,
       char_type *__pend) [inline, protected, inherited]
       Setting the three write area pointers. Parameters:
           pbeg A pointer.
           pend A pointer.

       Postcondition:
           pbeg == pbase(), pbeg == pptr(), and pend == epptr()

       Definition at line 533 of file streambuf.

   int_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::sgetc () [inline,
       inherited]
       Getting the next character. Returns:
           The next character, or eof.

       If the input read position is available, returns that character, otherwise calls and
       returns underflow(). Does not move the read position after fetching the character.

       Definition at line 316 of file streambuf.

   streamsize std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::sgetn (char_type
       *__s, streamsize__n) [inline, inherited]
       Entry point for xsgetn. Parameters:
           s A buffer area.
           n A count.

       Returns xsgetn(s,n). The effect is to fill s[0] through s[n-1] with characters from the
       input sequence, if possible.

       Definition at line 335 of file streambuf.

   virtual streamsize std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::showmanyc ()
       [protected, virtual, inherited]
       Investigating the data available. Returns:
           An estimate of the number of characters available in the input sequence, or -1.

       If it returns a positive value, then successive calls to underflow() will not return
       traits::eof() until at least that number of characters have been supplied. If showmanyc()
       returns -1, then calls to underflow() or uflow() will fail. [27.5.2.4.3]/1

       Note:
           Base class version does nothing, returns zero.

           The standard adds that the intention is not only that the calls [to underflow or
           uflow] will not return eof() but that they will return immediately.

           The standard adds that the morphemes of showmanyc are es-how-many-see, not show-manic.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   int_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::snextc () [inline,
       inherited]
       Getting the next character. Returns:
           The next character, or eof.

       Calls sbumpc(), and if that function returns traits::eof(), so does this function.
       Otherwise, sgetc().

       Definition at line 276 of file streambuf.

   int_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::sputbackc
       (char_type__c) [inline, inherited]
       Pushing characters back into the input stream. Parameters:
           c The character to push back.

       Returns:
           The previous character, if possible.

       Similar to sungetc(), but c is pushed onto the stream instead of the previous character.
       If successful, the next character fetched from the input stream will be c.

       Definition at line 350 of file streambuf.

   int_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::sputc (char_type__c)
       [inline, inherited]
       Entry point for all single-character output functions. Parameters:
           c A character to output.

       Returns:
           c, if possible.

       One of two public output functions.

       If a write position is available for the output sequence (i.e., the buffer is not full),
       stores c in that position, increments the position, and returns traits::to_int_type(c). If
       a write position is not available, returns overflow(c).

       Definition at line 402 of file streambuf.

   streamsize std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::sputn (const
       char_type *__s, streamsize__n) [inline, inherited]
       Entry point for all single-character output functions. Parameters:
           s A buffer read area.
           n A count.

       One of two public output functions.

       Returns xsputn(s,n). The effect is to write s[0] through s[n-1] to the output sequence, if
       possible.

       Definition at line 428 of file streambuf.

   void std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::stossc () [inline,
       inherited]
       Tosses a character. Advances the read pointer, ignoring the character that would have been
       read.

       See http://gcc.gnu.org/ml/libstdc++/2002-05/msg00168.html

       Definition at line 761 of file streambuf.

   int_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::sungetc () [inline,
       inherited]
       Moving backwards in the input stream. Returns:
           The previous character, if possible.

       If a putback position is available, this function decrements the input pointer and returns
       that character. Otherwise, calls and returns pbackfail(). The effect is to unget the last
       character gotten.

       Definition at line 375 of file streambuf.

   virtual int std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::sync (void)
       [protected, virtual, inherited]
       Synchronizes the buffer arrays with the controlled sequences. Returns:
           -1 on failure.

       Each derived class provides its own appropriate behavior, including the definition of
       failure.

       Note:
           Base class version does nothing, returns zero.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   virtual int_type std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::uflow ()
       [inline, protected, virtual, inherited]
       Fetches more data from the controlled sequence. Returns:
           The first character from the pending sequence.

       Informally, this function does the same thing as underflow(), and in fact is required to
       call that function. It also returns the new character, like underflow() does. However,
       this function also moves the read position forward by one.

       Definition at line 678 of file streambuf.

   virtual int_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::underflow ()
       [protected, virtual, inherited]
       Fetches more data from the controlled sequence. Returns:
           The first character from the pending sequence.

       Informally, this function is called when the input buffer is exhausted (or does not exist,
       as buffering need not actually be done). If a buffer exists, it is refilled. In either
       case, the next available character is returned, or traits::eof() to indicate a null
       pending sequence.

       For a formal definition of the pending sequence, see a good text such as Langer & Kreft,
       or [27.5.2.4.3]/7-14.

       A functioning input streambuf can be created by overriding only this function (no buffer
       area will be used). For an example, see
       http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25.html

       Note:
           Base class version does nothing, returns eof().

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   virtual streamsize std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::xsgetn
       (char_type *__s, streamsize__n) [protected, virtual, inherited]
       Multiple character extraction. Parameters:
           s A buffer area.
           n Maximum number of characters to assign.

       Returns:
           The number of characters assigned.

       Fills s[0] through s[n-1] with characters from the input sequence, as if by sbumpc().
       Stops when either n characters have been copied, or when traits::eof() would be copied.

       It is expected that derived classes provide a more efficient implementation by overriding
       this definition.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

   virtual streamsize std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::xsputn
       (const char_type *__s, streamsize__n) [protected, virtual, inherited]
       Multiple character insertion. Parameters:
           s A buffer area.
           n Maximum number of characters to write.

       Returns:
           The number of characters written.

       Writes s[0] through s[n-1] to the output sequence, as if by sputc(). Stops when either n
       characters have been copied, or when sputc() would return traits::eof().

       It is expected that derived classes provide a more efficient implementation by overriding
       this definition.

       Reimplemented from std::basic_streambuf< _CharT, encoding_char_traits< _CharT > >.

Member Data Documentation

   char_type* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_buf [protected,
       inherited]
       Pointer to the beginning of internal buffer.

       Definition at line 109 of file fstream.

   locale std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::_M_buf_locale
       [protected, inherited]
       Current locale setting.

       Definition at line 188 of file streambuf.

   size_t std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_buf_size [protected,
       inherited] Actual size of internal buffer. This number is equal to the size of the put
       area + 1 position, reserved for the overflow char of a full area.
       Definition at line 116 of file fstream.

   char* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_ext_buf [protected,
       inherited] Buffer for external characters. Used for input when codecvt::always_noconv() ==
       false. When valid, this corresponds to eback().
       Definition at line 151 of file fstream.

   streamsize std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_ext_buf_size
       [protected, inherited] Size of buffer held by _M_ext_buf.
       Definition at line 156 of file fstream.

   const char* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_ext_next
       [protected, inherited] Pointers into the buffer held by _M_ext_buf that delimit a
       subsequence of bytes that have been read but not yet converted. When valid, _M_ext_next
       corresponds to egptr().
       Definition at line 163 of file fstream.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::_M_in_beg
       [protected, inherited] This is based on _IO_FILE, just reordered to be more consistent,
       and is intended to be the most minimal abstraction for an internal buffer.
       · get == input == read

       · put == output == write

       Definition at line 180 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::_M_in_cur
       [protected, inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 181 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::_M_in_end
       [protected, inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 182 of file streambuf.

   ios_base::openmode std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_mode
       [protected, inherited]
       Place to stash in || out || in | out settings for current filebuf.

       Definition at line 94 of file fstream.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::_M_out_beg
       [protected, inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 183 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::_M_out_cur
       [protected, inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 184 of file streambuf.

   char_type* std::basic_streambuf< _CharT, encoding_char_traits< _CharT >  >::_M_out_end
       [protected, inherited]
       Entry point for imbue(). Parameters:
           loc The new locale.

       Returns:
           The previous locale.

       Calls the derived imbue(loc).

       Definition at line 185 of file streambuf.

   char_type std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_pback [protected,
       inherited] Necessary bits for putback buffer management.
       Note:
           pbacks of over one character are not currently supported.

       Definition at line 137 of file fstream.

   char_type* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_pback_cur_save
       [protected, inherited] Necessary bits for putback buffer management.
       Note:
           pbacks of over one character are not currently supported.

       Definition at line 138 of file fstream.

   char_type* std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_pback_end_save
       [protected, inherited] Necessary bits for putback buffer management.
       Note:
           pbacks of over one character are not currently supported.

       Definition at line 139 of file fstream.

   bool std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_pback_init [protected,
       inherited] Necessary bits for putback buffer management.
       Note:
           pbacks of over one character are not currently supported.

       Definition at line 140 of file fstream.

   bool std::basic_filebuf< _CharT, encoding_char_traits< _CharT >  >::_M_reading [protected,
       inherited] _M_reading == false && _M_writing == false for uncommitted mode; _M_reading ==
       true for read mode; _M_writing == true for write mode;
       NB: _M_reading == true && _M_writing == true is unused.

       Definition at line 128 of file fstream.

Author

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