__gnu_cxx::stdio_sync_filebuf.3cxx

       Generated automatically by Doxygen for libstdc++ from the source code.

                                                    libstd__gnu_cxx::stdio_sync_filebuf<_CharT,_Traits>(3cxx)

template<typename_CharT,typename_Traits=std::char_traits<_CharT>>
       class __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >"Provides a layer of compatibility for C.

       This GNU extension provides extensions for working with standard C FILE*'s. It must be instantiated by
       the user with the type of character used in the file stream, e.g., stdio_filebuf<char>.

template<typename_CharT,typename_Traits>localestd::basic_streambuf<_CharT,_Traits>::_M_buf_locale[protected],[inherited]
       Current locale setting.

       Referenced by std::basic_filebuf<_CharT,_Traits>::basic_filebuf().

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::_M_in_beg[protected],[inherited]
       Start of get area.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::_M_in_cur[protected],[inherited]
       Current read area.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::_M_in_end[protected],[inherited]
       End of get area.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::_M_out_beg[protected],[inherited]
       Start of put area.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::_M_out_cur[protected],[inherited]
       Current put area.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::_M_out_end[protected],[inherited]
       End of put area.

template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::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

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::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

       Referenced by std::wbuffer_convert<_Codecvt,_Elem,_Tr>::underflow().

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::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

   template<typename_CharT,typename_Traits=std::char_traits<_CharT>>std::__c_file*__gnu_cxx::stdio_sync_filebuf<_CharT,_Traits>::file()[inline]Returns
           The underlying FILE*.

       This function can be used to access the underlying C file pointer. Note that there  is  no  way  for  the
       library to track what you do with the file, so be careful.

   template<typename_CharT,typename_Traits>voidstd::basic_streambuf<_CharT,_Traits>::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.

   template<typename_CharT,typename_Traits>localestd::basic_streambuf<_CharT,_Traits>::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.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::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

       Referenced by std::wbuffer_convert<_Codecvt,_Elem,_Tr>::underflow().

   template<typename_CharT,typename_Traits>virtualvoidstd::basic_streambuf<_CharT,_Traits>::imbue(constlocale&__loc)[inline],[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,  Betweeninvocationsofthisfunctionaclassderivedfromstreambufcansafelycacheresultsofcallstolocalefunctionsandtomembersoffacetssoobtained.Note
           Base class version does nothing.

       Reimplemented in std::basic_filebuf<_CharT,_Traits>, std::basic_filebuf<_CharT,encoding_char_traits<_CharT>>, std::basic_filebuf<_CharT,std::char_traits<_CharT>>, and std::basic_filebuf<char_type,traits_type>.

   template<typename_CharT,typename_Traits>streamsizestd::basic_streambuf<_CharT,_Traits>::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().

   template<typename_CharT,typename_Traits=std::char_traits<_CharT>>virtualint_type__gnu_cxx::stdio_sync_filebuf<_CharT,_Traits>::overflow(int_type__c=traits_type::eof())[inline],[protected],[virtual]
       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 someeffect 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,_Traits>.

   template<typename_CharT,typename_Traits=std::char_traits<_CharT>>virtualint_type__gnu_cxx::stdio_sync_filebuf<_CharT,_Traits>::pbackfail(int_type__c=traits_type::eof())[inline],[protected],[virtual]
       Tries to back up the input sequence.

       Parameters__c The character to be inserted back into the sequence.

       Returns
           eof() on failure, someothervalue 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,_Traits>.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::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

   template<typename_CharT,typename_Traits>voidstd::basic_streambuf<_CharT,_Traits>::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.

   template<typename_CharT,typename_Traits>char_type*std::basic_streambuf<_CharT,_Traits>::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

   template<typename_CharT,typename_Traits>localestd::basic_streambuf<_CharT,_Traits>::pubimbue(constlocale&__loc)[inline],[inherited]
       Entry point for imbue().

       Parameters__loc The new locale.

       Returns
           The previous locale.

       Calls the derived imbue(__loc).

   template<typename_CharT,typename_Traits>pos_typestd::basic_streambuf<_CharT,_Traits>::pubseekoff(off_type__off,ios_base::seekdir__way,ios_base::openmode__mode=ios_base::in|ios_base::out)[inline],[inherited]
       Alters the stream position.

       Parameters__off Offset.
           __way Value for ios_base::seekdir.
           __mode Value for ios_base::openmode.

       Calls virtual seekoff function.

   template<typename_CharT,typename_Traits>pos_typestd::basic_streambuf<_CharT,_Traits>::pubseekpos(pos_type__sp,ios_base::openmode__mode=ios_base::in|ios_base::out)[inline],[inherited]
       Alters the stream position.

       Parameters__sp Position
           __mode Value for ios_base::openmode.

       Calls virtual seekpos function.

   template<typename_CharT,typename_Traits>basic_streambuf*std::basic_streambuf<_CharT,_Traits>::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.

   template<typename_CharT,typename_Traits>intstd::basic_streambuf<_CharT,_Traits>::pubsync()[inline],[inherited]
       Calls virtual sync function.

   template<typename_CharT,typename_Traits>int_typestd::basic_streambuf<_CharT,_Traits>::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().

   template<typename_CharT,typename_Traits>virtualpos_typestd::basic_streambuf<_CharT,_Traits>::seekoff(off_type,ios_base::seekdir,ios_base::openmode=ios_base::in|ios_base::out)[inline],[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 in std::basic_filebuf<_CharT,_Traits>, std::basic_filebuf<_CharT,encoding_char_traits<_CharT>>,  std::basic_filebuf<_CharT,std::char_traits<_CharT>>, std::basic_filebuf<char_type,traits_type>, and std::basic_stringbuf<_CharT,_Traits,_Alloc>.

   template<typename_CharT,typename_Traits>virtualpos_typestd::basic_streambuf<_CharT,_Traits>::seekpos(pos_type,ios_base::openmode=ios_base::in|ios_base::out)[inline],[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 in std::basic_filebuf<_CharT,_Traits>, std::basic_filebuf<_CharT,encoding_char_traits<_CharT>>, std::basic_filebuf<_CharT,std::char_traits<_CharT>>,  std::basic_filebuf<char_type,traits_type>, and std::basic_stringbuf<_CharT,_Traits,_Alloc>.

   template<typename_CharT,typename_Traits>virtualbasic_streambuf<char_type,_Traits>*std::basic_streambuf<_CharT,_Traits>::setbuf(char_type*,streamsize)[inline],[protected],[virtual],[inherited]
       Manipulates  the  buffer.  Each derived class provides its own appropriate behavior. See the next-to-last
       paragraph of  https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering  for
       more on this function.

       Note
           Base class version does nothing, returns this.

       Reimplemented in std::basic_filebuf<_CharT,_Traits>, std::basic_filebuf<_CharT,encoding_char_traits<_CharT>>,  std::basic_filebuf<_CharT,std::char_traits<_CharT>>, std::basic_filebuf<char_type,traits_type>, and std::basic_stringbuf<_CharT,_Traits,_Alloc>.

   template<typename_CharT,typename_Traits>voidstd::basic_streambuf<_CharT,_Traits>::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()

       Referenced by std::wbuffer_convert<_Codecvt,_Elem,_Tr>::wbuffer_convert().

   template<typename_CharT,typename_Traits>voidstd::basic_streambuf<_CharT,_Traits>::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()

       Referenced by std::wbuffer_convert<_Codecvt,_Elem,_Tr>::wbuffer_convert().

   template<typename_CharT,typename_Traits>int_typestd::basic_streambuf<_CharT,_Traits>::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.

   template<typename_CharT,typename_Traits>streamsizestd::basic_streambuf<_CharT,_Traits>::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.

   template<typename_CharT,typename_Traits>virtualstreamsizestd::basic_streambuf<_CharT,_Traits>::showmanyc()[inline],[protected],[virtual],[inherited]
       Investigating the data available.

       Returns
           An estimate of the number of characters available in the input sequence, or -1.

       Ifitreturnsapositivevalue,thensuccessivecallstounderflow()willnotreturntraits::eof()untilatleastthatnumberofcharactershavebeensupplied.Ifshowmanyc()returns-1,thencallstounderflow()oruflow()willfail.[27.5.2.4.3]/1Note
           Base class version does nothing, returns zero.

           The standard adds that theintentionisnotonlythatthecalls[tounderfloworuflow]willnotreturneof()butthattheywillreturnimmediately.

           The standard adds that themorphemesofshowmanycarees-how-many-see,notshow-manic.

       Reimplemented in std::basic_filebuf<_CharT,_Traits>, std::basic_filebuf<_CharT,encoding_char_traits<_CharT>>,  std::basic_filebuf<_CharT,std::char_traits<_CharT>>, std::basic_filebuf<char_type,traits_type>, and std::basic_stringbuf<_CharT,_Traits,_Alloc>.

   template<typename_CharT,typename_Traits>int_typestd::basic_streambuf<_CharT,_Traits>::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().

   template<typename_CharT,typename_Traits>int_typestd::basic_streambuf<_CharT,_Traits>::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 thepreviouscharacter. If successful,
       the next character fetched from the input stream will be __c.

   template<typename_CharT,typename_Traits>int_typestd::basic_streambuf<_CharT,_Traits>::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).

       Referenced by std::wbuffer_convert<_Codecvt,_Elem,_Tr>::overflow().

   template<typename_CharT,typename_Traits>streamsizestd::basic_streambuf<_CharT,_Traits>::sputn(constchar_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.

   template<typename_CharT,typename_Traits>int_typestd::basic_streambuf<_CharT,_Traits>::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.

   template<typename_CharT,typename_Traits=std::char_traits<_CharT>>virtualint__gnu_cxx::stdio_sync_filebuf<_CharT,_Traits>::sync()[inline],[protected],[virtual]
       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,_Traits>.

   template<typename_CharT,typename_Traits=std::char_traits<_CharT>>virtualint_type__gnu_cxx::stdio_sync_filebuf<_CharT,_Traits>::uflow()[inline],[protected],[virtual]
       Fetches more data from the controlled sequence.

       Returns
           The first character from the pendingsequence.

       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.

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

   template<typename_CharT,typename_Traits=std::char_traits<_CharT>>virtualint_type__gnu_cxx::stdio_sync_filebuf<_CharT,_Traits>::underflow()[inline],[protected],[virtual]
       Fetches more data from the controlled sequence.

       Returns
           The first character from the pendingsequence.

       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 https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html

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

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

   template<typename_CharT,typename_Traits>streamsizestd::basic_streambuf<_CharT,_Traits>::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 in std::basic_filebuf<_CharT,_Traits>, std::basic_filebuf<_CharT,encoding_char_traits<_CharT>>, std::basic_filebuf<_CharT,std::char_traits<_CharT>>, and std::basic_filebuf<char_type,traits_type>.

       References std::min().

   template<typename_CharT,typename_Traits>streamsizestd::basic_streambuf<_CharT,_Traits>::xsputn(constchar_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 in std::basic_filebuf<_CharT,_Traits>, std::basic_filebuf<_CharT,encoding_char_traits<_CharT>>, std::basic_filebuf<_CharT,std::char_traits<_CharT>>, and std::basic_filebuf<char_type,traits_type>.

       References std::min().

       __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits > - Provides a layer of compatibility for C.

       #include <stdio_sync_filebuf.h>

       Inherits std::basic_streambuf<_CharT,_Traits>.

   PublicTypes
       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 traits_typePublicMemberFunctionsstdio_sync_filebuf (std::__c_file *__f)
       stdio_sync_filebuf (stdio_sync_filebuf &&__fb) noexcept
       std::__c_file * file ()
       locale getloc () const
           Locale access.
       streamsize in_avail ()
           Looking ahead into the stream.
       stdio_sync_filebuf & operator= (stdio_sync_filebuf &&__fb) noexcept
       locale pubimbue (const locale &__loc)
           Entry point for imbue().
       int_type sbumpc ()
           Getting the next character.
       int_type sgetc ()
           Getting the next character.
       streamsize sgetn (char_type *__s, streamsize __n)
           Entry point for xsgetn.
       int_type snextc ()
           Getting the next character.
       int_type sputbackc (char_type __c)
           Pushing characters back into the input stream.
       int_type sputc (char_type __c)
           Entry point for all single-character output functions.
       streamsize sputn (const char_type *__s, streamsize __n)
           Entry point for all single-character output functions.
       int_type sungetc ()
           Moving backwards in the input stream.
       void swap (stdio_sync_filebuf &__fb)

           basic_streambuf * pubsetbuf (char_type *__s, streamsize __n)
               Entry points for derived buffer functions.
           pos_type pubseekoff (off_type __off, ios_base::seekdir __way, ios_base::openmode
               __mode=ios_base::in|ios_base::out)
               Alters the stream position.
           pos_type pubseekpos (pos_type __sp, ios_base::openmode __mode=ios_base::in|ios_base::out)
               Alters the stream position.
           int pubsync ()
               Calls virtual sync function.

   ProtectedMemberFunctions
       void __safe_gbump (streamsize __n)
       void __safe_pbump (streamsize __n)
       void gbump (int __n)
           Moving the read position.
       virtual void imbue (const locale &__loc)
           Changes translations.
       virtual int_type overflow (int_type __c=traits_type::eof())
           Consumes data from the buffer; writes to the controlled sequence.
       virtual int_type pbackfail (int_type __c=traits_type::eof())
           Tries to back up the input sequence.
       void pbump (int __n)
           Moving the write position.
       virtual pos_type seekoff (off_type, ios_base::seekdir, ios_base::openmode=ios_base::in|ios_base::out)
           Alters the stream positions.
       virtual std::streamposseekoff (std::streamoff __off, std::ios_base::seekdir __dir,
           std::ios_base::openmode=std::ios_base::in|std::ios_base::out)
       virtual pos_type seekpos (pos_type, ios_base::openmode=ios_base::in|ios_base::out)
           Alters the stream positions.
       virtual std::streamposseekpos (std::streampos __pos, std::ios_base::openmode
           __mode=std::ios_base::in|std::ios_base::out)
       virtual basic_streambuf< char_type, _Traits > * setbuf (char_type *, streamsize)
           Manipulates the buffer.
       void setg (char_type *__gbeg, char_type *__gnext, char_type *__gend)
           Setting the three read area pointers.
       void setp (char_type *__pbeg, char_type *__pend)
           Setting the three write area pointers.
       virtual streamsize showmanyc ()
           Investigating the data available.
       void swap (basic_streambuf &__sb)
       virtual int sync ()
           Synchronizes the buffer arrays with the controlled sequences.
       int_type syncgetc ()
       stdio_sync_filebuf< char >::int_type syncgetc ()
       stdio_sync_filebuf< wchar_t >::int_type syncgetc ()
       int_type syncputc (int_type __c)
       stdio_sync_filebuf< char >::int_type syncputc (int_type __c)
       stdio_sync_filebuf< wchar_t >::int_type syncputc (int_type __c)
       int_type syncungetc (int_type __c)
       stdio_sync_filebuf< char >::int_type syncungetc (int_type __c)
       stdio_sync_filebuf< wchar_t >::int_type syncungetc (int_type __c)
       virtual int_type uflow ()
           Fetches more data from the controlled sequence.
       virtual int_type underflow ()
           Fetches more data from the controlled sequence.
       std::streamsizexsgetn (char *__s, std::streamsize __n)
       virtual std::streamsizexsgetn (char_type *__s, std::streamsize __n)
       virtual streamsize xsgetn (char_type *__s, streamsize __n)
           Multiple character extraction.
       std::streamsizexsgetn (wchar_t *__s, std::streamsize __n)
       std::streamsizexsputn (const char *__s, std::streamsize __n)
       virtual std::streamsizexsputn (const char_type *__s, std::streamsize __n)
       virtual streamsize xsputn (const char_type *__s, streamsize __n)
           Multiple character insertion.
       std::streamsizexsputn (const wchar_t *__s, std::streamsize __n)

           char_type * eback () const
               Access to the get area.
           char_type * gptr () const
               Access to the get area.
           char_type * egptr () const
               Access to the get area.

           char_type * pbase () const
               Access to the put area.
           char_type * pptr () const
               Access to the put area.
           char_type * epptr () const
               Access to the put area.

   ProtectedAttributes
       locale _M_buf_locale
           Current locale setting.
       char_type * _M_in_beg
           Start of get area.
       char_type * _M_in_cur
           Current read area.
       char_type * _M_in_end
           End of get area.
       char_type * _M_out_beg
           Start of put area.
       char_type * _M_out_cur
           Current put area.
       char_type * _M_out_end
           End of put area.