class stdio_sync_filebuf.
Inherits std::basic_streambuf< _CharT, _Traits >.
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_type
std::__c_file *const file ()
streamsize in_avail ()
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)
stdio_sync_filebuf (std::__c_file *__f)
void stossc ()
int_type sungetc ()
template<> stdio_sync_filebuf< wchar_t >::int_type syncgetc ()
template<> stdio_sync_filebuf< char >::int_type syncgetc ()
template<> stdio_sync_filebuf< wchar_t >::int_type syncputc (int_type __c)
template<> stdio_sync_filebuf< char >::int_type syncputc (int_type __c)
template<> stdio_sync_filebuf< wchar_t >::int_type syncungetc (int_type __c)
template<> stdio_sync_filebuf< char >::int_type syncungetc (int_type __c)
template<> std::streamsize xsgetn (wchar_t *__s, std::streamsize __n)
template<> std::streamsize xsgetn (char *__s, std::streamsize __n)
template<> std::streamsize xsputn (const wchar_t *__s, std::streamsize __n)
template<> std::streamsize xsputn (const char *__s, std::streamsize __n)
void gbump (int __n)
virtual void imbue (const locale &)
virtual int_type overflow (int_type __c=traits_type::eof())
virtual int_type pbackfail (int_type __c=traits_type::eof())
void pbump (int __n)
virtual pos_type seekoff (off_type, ios_base::seekdir, ios_base::openmode=ios_base::in|ios_base::out)
virtual std::streampos seekoff (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)
virtual std::streampos seekpos (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)
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 ()
int_type syncgetc ()
int_type syncputc (int_type __c)
int_type syncungetc (int_type __c)
virtual int_type uflow ()
virtual int_type underflow ()
virtual std::streamsize xsgetn (char_type *__s, std::streamsize __n)
virtual std::streamsize xsputn (const char_type *__s, std::streamsize __n)
streamsize __copy_streambufs (__streambuf_type *__sbin, __streambuf_type *__sbout)
class basic_ios< char_type, traits_type >
class basic_istream< char_type, traits_type >
class basic_ostream< char_type, traits_type >
template<typename _CharT2 , typename _Traits2 , typename _Alloc > basic_istream< _CharT2, _Traits2 > & getline (basic_istream< _CharT2, _Traits2 > &, basic_string< _CharT2, _Traits2, _Alloc > &, _CharT2)
class istreambuf_iterator< char_type, traits_type >
template<typename _CharT2 , typename _Traits2 , typename _Alloc > basic_istream< _CharT2, _Traits2 > & operator>> (basic_istream< _CharT2, _Traits2 > &, basic_string< _CharT2, _Traits2, _Alloc > &)
template<typename _CharT2 , typename _Traits2 > basic_istream< _CharT2, _Traits2 > & operator>> (basic_istream< _CharT2, _Traits2 > &, _CharT2 *)
class ostreambuf_iterator< char_type, traits_type >
typedef basic_streambuf< char_type, traits_type > __streambuf_type
locale getloc () const
locale pubimbue (const locale &__loc)
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)
__streambuf_type * pubsetbuf (char_type *__s, streamsize __n)
int pubsync ()
char_type * eback () const
char_type * egptr () const
char_type * epptr () const
char_type * gptr () const
char_type * pbase () const
char_type * pptr () const
locale _M_buf_locale
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
Definition at line 51 of file stdio_sync_filebuf.h.
Locale access. Returns:
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.
Reimplemented in basic_filebuf< _CharT, _Traits >, basic_stringbuf< _CharT, _Traits, _Alloc >, and basic_filebuf< char_type, traits_type >.
Definition at line 144 of file streambuf.
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 55 of file stdio_sync_filebuf.h.
Locale access. Returns:
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.
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 57 of file stdio_sync_filebuf.h.
Locale access. Returns:
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.
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 59 of file stdio_sync_filebuf.h.
Locale access. Returns:
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.
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 58 of file stdio_sync_filebuf.h.
Locale access. Returns:
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.
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 56 of file stdio_sync_filebuf.h.
Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 465 of file streambuf.
Referenced by basic_filebuf< _CharT, _Traits >::imbue(), basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::pbackfail(), basic_filebuf< _CharT, _Traits >::pbackfail(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_filebuf< _CharT, _Traits >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputbackc(), basic_streambuf< char_type, traits_type >::sungetc(), basic_filebuf< _CharT, _Traits >::underflow(), and basic_filebuf< _CharT, _Traits >::xsgetn().
Locale access. Returns:
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 471 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::in_avail(), basic_streambuf< char_type, traits_type >::sbumpc(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_filebuf< _CharT, _Traits >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sgetc(), basic_stringbuf< _CharT, _Traits, _Alloc >::showmanyc(), basic_filebuf< _CharT, _Traits >::showmanyc(), basic_streambuf< char_type, traits_type >::stossc(), basic_stringbuf< _CharT, _Traits, _Alloc >::str(), basic_stringbuf< _CharT, _Traits, _Alloc >::underflow(), basic_filebuf< _CharT, _Traits >::underflow(), basic_streambuf< _CharT, _Traits >::xsgetn(), and basic_filebuf< _CharT, _Traits >::xsgetn().
Locale access. Returns:
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 518 of file streambuf.
Referenced by basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_streambuf< char_type, traits_type >::sputc(), basic_streambuf< _CharT, _Traits >::xsputn(), and basic_filebuf< _CharT, _Traits >::xsputn().
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.
Definition at line 83 of file stdio_sync_filebuf.h.
Moving the read position. Parameters:
This just advances the read position without returning any data.
Definition at line 481 of file streambuf.
Referenced by basic_stringbuf< _CharT, _Traits, _Alloc >::pbackfail(), basic_filebuf< _CharT, _Traits >::pbackfail(), basic_streambuf< char_type, traits_type >::sbumpc(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputbackc(), basic_streambuf< char_type, traits_type >::stossc(), basic_streambuf< char_type, traits_type >::sungetc(), basic_streambuf< char_type, traits_type >::uflow(), basic_streambuf< _CharT, _Traits >::xsgetn(), and basic_filebuf< _CharT, _Traits >::xsgetn().
Locale access. Returns:
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 228 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::pubimbue().
Locale access. Returns:
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 468 of file streambuf.
Referenced by basic_filebuf< _CharT, _Traits >::imbue(), basic_streambuf< char_type, traits_type >::in_avail(), basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::pbackfail(), basic_filebuf< _CharT, _Traits >::pbackfail(), basic_streambuf< char_type, traits_type >::sbumpc(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_filebuf< _CharT, _Traits >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sgetc(), basic_stringbuf< _CharT, _Traits, _Alloc >::showmanyc(), basic_filebuf< _CharT, _Traits >::showmanyc(), basic_streambuf< char_type, traits_type >::sputbackc(), basic_streambuf< char_type, traits_type >::stossc(), basic_streambuf< char_type, traits_type >::sungetc(), basic_streambuf< char_type, traits_type >::uflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::underflow(), basic_filebuf< _CharT, _Traits >::underflow(), basic_streambuf< _CharT, _Traits >::xsgetn(), and basic_filebuf< _CharT, _Traits >::xsgetn().
Changes translations. Parameters:
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:
Reimplemented in basic_filebuf< _CharT, _Traits >, and basic_filebuf< char_type, traits_type >.
Definition at line 559 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::pubimbue().
Looking ahead into the stream. Returns:
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 268 of file streambuf.
Consumes data from the buffer; writes to the controlled sequence. Parameters:
Returns:
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 definiton 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:
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 136 of file stdio_sync_filebuf.h.
Tries to back up the input sequence. Parameters:
Returns:
Postcondition:
Note:
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 111 of file stdio_sync_filebuf.h.
Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 512 of file streambuf.
Referenced by basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_filebuf< _CharT, _Traits >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_stringbuf< _CharT, _Traits, _Alloc >::str(), basic_filebuf< _CharT, _Traits >::sync(), and basic_filebuf< _CharT, _Traits >::xsputn().
Moving the write position. Parameters:
This just advances the write position without returning any data.
Definition at line 528 of file streambuf.
Referenced by basic_filebuf< _CharT, _Traits >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputc(), and basic_streambuf< _CharT, _Traits >::xsputn().
Locale access. Returns:
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 515 of file streambuf.
Referenced by basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_filebuf< _CharT, _Traits >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputc(), basic_stringbuf< _CharT, _Traits, _Alloc >::str(), basic_filebuf< _CharT, _Traits >::sync(), basic_streambuf< _CharT, _Traits >::xsputn(), and basic_filebuf< _CharT, _Traits >::xsputn().
Entry point for imbue(). Parameters:
Returns:
Calls the derived imbue(loc).
Definition at line 211 of file streambuf.
Locale access. Returns:
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 245 of file streambuf.
Locale access. Returns:
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 250 of file streambuf.
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 241 of file streambuf.
Locale access. Returns:
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 255 of file streambuf.
Referenced by basic_istream< _CharT, _Traits >::sync().
Getting the next character. Returns:
If the input read position is available, returns that character and increments the read pointer, otherwise calls and returns uflow().
Definition at line 300 of file streambuf.
Referenced by basic_istream< _CharT, _Traits >::getline(), basic_istream< _CharT, _Traits >::ignore(), istreambuf_iterator< _CharT, _Traits >::operator++(), std::operator>>(), and basic_streambuf< char_type, traits_type >::snextc().
Alters the stream positions. Each derived class provides its own appropriate behavior.
Note:
Reimplemented in basic_filebuf< _CharT, _Traits >, basic_stringbuf< _CharT, _Traits, _Alloc >, and basic_filebuf< char_type, traits_type >.
Definition at line 585 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::pubseekoff().
Alters the stream positions. Each derived class provides its own appropriate behavior.
Note:
Reimplemented in basic_filebuf< _CharT, _Traits >, basic_stringbuf< _CharT, _Traits, _Alloc >, and basic_filebuf< char_type, traits_type >.
Definition at line 597 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::pubseekpos().
Maniuplates the buffer. Each derived class provides its own appropriate behavior. See the next-to-last paragraph of http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#2 for more on this function.
Note:
Reimplemented in basic_filebuf< _CharT, _Traits >, basic_stringbuf< _CharT, _Traits, _Alloc >, and basic_filebuf< char_type, traits_type >.
Definition at line 574 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::pubsetbuf().
Setting the three read area pointers. Parameters:
Postcondition:
Definition at line 492 of file streambuf.
Setting the three write area pointers. Parameters:
Postcondition:
Definition at line 538 of file streambuf.
Getting the next character. Returns:
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 322 of file streambuf.
Referenced by basic_istream< _CharT, _Traits >::get(), basic_istream< _CharT, _Traits >::getline(), basic_istream< _CharT, _Traits >::ignore(), sentry::sentry(), and basic_streambuf< char_type, traits_type >::snextc().
Entry point for xsgetn. Parameters:
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 341 of file streambuf.
Investigating the data available. Returns:
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:
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 @c showmanyc are
'es-how-many-see', not 'show-manic.
Reimplemented in basic_filebuf< _CharT, _Traits >, basic_stringbuf< _CharT, _Traits, _Alloc >, and basic_filebuf< char_type, traits_type >.
Definition at line 632 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::in_avail().
Getting the next character. Returns:
Calls sbumpc(), and if that function returns traits::eof(), so does this function. Otherwise, sgetc().
Definition at line 282 of file streambuf.
Referenced by basic_istream< _CharT, _Traits >::get(), basic_istream< _CharT, _Traits >::getline(), basic_istream< _CharT, _Traits >::ignore(), and sentry::sentry().
Pushing characters back into the input stream. Parameters:
Returns:
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 355 of file streambuf.
Referenced by std::operator>>(), and basic_istream< _CharT, _Traits >::putback().
Entry point for all single-character output functions. Parameters:
Returns:
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 407 of file streambuf.
Referenced by basic_istream< _CharT, _Traits >::get(), ostreambuf_iterator< _CharT, _Traits >::operator=(), and basic_stringbuf< _CharT, _Traits, _Alloc >::overflow().
Entry point for all single-character output functions. Parameters:
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 433 of file streambuf.
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
Note:
Definition at line 769 of file streambuf.
Moving backwards in the input stream. Returns:
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 380 of file streambuf.
Referenced by basic_istream< _CharT, _Traits >::unget().
Synchronizes the buffer arrays with the controlled sequences. Returns:
Each derived class provides its own appropriate behavior, including the definition of 'failure'.
Note:
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 155 of file stdio_sync_filebuf.h.
Fetches more data from the controlled sequence. Returns:
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 basic_streambuf< _CharT, _Traits >.
Definition at line 103 of file stdio_sync_filebuf.h.
Fetches more data from the controlled sequence. Returns:
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 definiton 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++/27_io/howto.html#6
Note:
Reimplemented from basic_streambuf< _CharT, _Traits >.
Definition at line 96 of file stdio_sync_filebuf.h.
Multiple character extraction. Parameters:
Returns:
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 basic_streambuf< _CharT, _Traits >.
Multiple character insertion. Parameters:
Returns:
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 basic_streambuf< _CharT, _Traits >.
Locale access. Returns:
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 194 of file streambuf.
Referenced by basic_filebuf< _CharT, _Traits >::basic_filebuf(), basic_streambuf< char_type, traits_type >::getloc(), and basic_streambuf< char_type, traits_type >::pubimbue().
Locale access. Returns:
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 182 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::eback(), and basic_streambuf< char_type, traits_type >::setg().
Locale access. Returns:
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 183 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::gbump(), basic_streambuf< char_type, traits_type >::gptr(), and basic_streambuf< char_type, traits_type >::setg().
Locale access. Returns:
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 184 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::egptr(), and basic_streambuf< char_type, traits_type >::setg().
Locale access. Returns:
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 185 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::pbase(), and basic_streambuf< char_type, traits_type >::setp().
Locale access. Returns:
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 186 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::pbump(), basic_streambuf< char_type, traits_type >::pptr(), and basic_streambuf< char_type, traits_type >::setp().
Locale access. Returns:
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 187 of file streambuf.
Referenced by basic_streambuf< char_type, traits_type >::epptr(), and basic_streambuf< char_type, traits_type >::setp().
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