This class associates either or both of its input and output sequences with a sequence of characters, which can be initialized from, or made available as, a std::basic_string
. (Paraphrased from [27.7.1]/1.).
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This class associates either or both of its input and output sequences with a sequence of characters, which can be initialized from, or made available as, a std::basic_string
. (Paraphrased from [27.7.1]/1.).
For this class, open modes (of type ios_base::openmode
) have in
set if the input sequence can be read, and out
set if the output sequence can be written.
Definition at line 58 of file sstream.
typedef basic_streambuf<char_type, traits_type> std::basic_stringbuf< _CharT, _Traits, _Alloc >::__streambuf_type |
typedef _CharT std::basic_stringbuf< _CharT, _Traits, _Alloc >::char_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_streambuf< _CharT, _Traits >.
typedef traits_type::int_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::int_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_streambuf< _CharT, _Traits >.
typedef traits_type::off_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::off_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_streambuf< _CharT, _Traits >.
typedef traits_type::pos_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::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_streambuf< _CharT, _Traits >.
typedef _Traits std::basic_stringbuf< _CharT, _Traits, _Alloc >::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_streambuf< _CharT, _Traits >.
std::basic_stringbuf< _CharT, _Traits, _Alloc >::basic_stringbuf | ( | ios_base::openmode | __mode = ios_base::in | ios_base::out |
) | [inline, explicit] |
std::basic_stringbuf< _CharT, _Traits, _Alloc >::basic_stringbuf | ( | const __string_type & | __str, | |
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [inline, explicit] |
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.
Definition at line 458 of file streambuf.
Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), std::basic_filebuf< _CharT, _Traits >::underflow(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().
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.
Definition at line 464 of file streambuf.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::underflow(), std::basic_filebuf< _CharT, _Traits >::underflow(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().
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.
Definition at line 511 of file streambuf.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow().
void std::basic_streambuf< _CharT , _Traits >::gbump | ( | int | __n | ) | [inline, protected, inherited] |
Moving the read position.
n | The delta by which to move. |
Definition at line 474 of file streambuf.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().
locale std::basic_streambuf< _CharT , _Traits >::getloc | ( | ) | const [inline, inherited] |
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.
Definition at line 461 of file streambuf.
Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::underflow(), std::basic_filebuf< _CharT, _Traits >::underflow(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().
virtual void std::basic_streambuf< _CharT , _Traits >::imbue | ( | const locale & | ) | [inline, protected, virtual, inherited] |
Changes translations.
loc | A new locale. |
Reimplemented in std::basic_filebuf< _CharT, _Traits >, and std::basic_filebuf< _CharT, _Traits >.
streamsize std::basic_streambuf< _CharT , _Traits >::in_avail | ( | ) | [inline, inherited] |
basic_stringbuf< _CharT, _Traits, _Alloc >::int_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow | ( | int_type | = traits_type::eof() |
) | [inline, protected, virtual] |
Consumes data from the buffer; writes to the controlled sequence.
c | An additional character to consume. |
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).
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 80 of file sstream.tcc.
References std::basic_stringbuf< _CharT, _Traits, _Alloc >::_M_mode, std::basic_string< _CharT, _Traits, _Alloc >::assign(), std::basic_string< _CharT, _Traits, _Alloc >::capacity(), std::basic_string< _CharT, _Traits, _Alloc >::data(), std::basic_streambuf< _CharT, _Traits >::eback(), std::basic_streambuf< _CharT, _Traits >::epptr(), std::basic_streambuf< _CharT, _Traits >::gptr(), std::max(), std::basic_string< _CharT, _Traits, _Alloc >::max_size(), std::min(), std::ios_base::out, std::basic_streambuf< _CharT, _Traits >::pbase(), std::basic_streambuf< _CharT, _Traits >::pbump(), std::basic_streambuf< _CharT, _Traits >::pptr(), std::basic_string< _CharT, _Traits, _Alloc >::push_back(), std::basic_string< _CharT, _Traits, _Alloc >::reserve(), and std::basic_string< _CharT, _Traits, _Alloc >::swap().
basic_stringbuf< _CharT, _Traits, _Alloc >::int_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::pbackfail | ( | int_type | = traits_type::eof() |
) | [inline, protected, virtual] |
Tries to back up the input sequence.
c | The character to be inserted back into the sequence. |
gptr()
, eback()
, and pptr()
are the same as for underflow()
.Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 46 of file sstream.tcc.
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.
Definition at line 505 of file streambuf.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), std::basic_filebuf< _CharT, _Traits >::overflow(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos().
void std::basic_streambuf< _CharT , _Traits >::pbump | ( | int | __n | ) | [inline, protected, inherited] |
Moving the write position.
n | The delta by which to move. |
Definition at line 521 of file streambuf.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), std::basic_filebuf< _CharT, _Traits >::overflow(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos().
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.
Definition at line 508 of file streambuf.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), std::basic_filebuf< _CharT, _Traits >::overflow(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos().
locale std::basic_streambuf< _CharT , _Traits >::pubimbue | ( | const locale & | __loc | ) | [inline, inherited] |
pos_type std::basic_streambuf< _CharT , _Traits >::pubseekoff | ( | off_type | __off, | |
ios_base::seekdir | __way, | |||
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [inline, inherited] |
pos_type std::basic_streambuf< _CharT , _Traits >::pubseekpos | ( | pos_type | __sp, | |
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [inline, inherited] |
__streambuf_type* std::basic_streambuf< _CharT , _Traits >::pubsetbuf | ( | char_type * | __s, | |
streamsize | __n | |||
) | [inline, inherited] |
int std::basic_streambuf< _CharT , _Traits >::pubsync | ( | ) | [inline, inherited] |
int_type std::basic_streambuf< _CharT , _Traits >::sbumpc | ( | ) | [inline, inherited] |
basic_stringbuf< _CharT, _Traits, _Alloc >::pos_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff | ( | off_type | , | |
ios_base::seekdir | , | |||
ios_base::openmode | = ios_base::in | ios_base::out | |||
) | [inline, protected, virtual] |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
pos_type
that represents an invalid stream position. Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 149 of file sstream.tcc.
References std::basic_stringbuf< _CharT, _Traits, _Alloc >::_M_mode, std::ios_base::cur, std::basic_streambuf< _CharT, _Traits >::eback(), std::basic_streambuf< _CharT, _Traits >::egptr(), std::ios_base::end, std::basic_streambuf< _CharT, _Traits >::gbump(), std::basic_streambuf< _CharT, _Traits >::gptr(), std::ios_base::in, std::ios_base::out, std::basic_streambuf< _CharT, _Traits >::pbase(), std::basic_streambuf< _CharT, _Traits >::pbump(), and std::basic_streambuf< _CharT, _Traits >::pptr().
basic_stringbuf< _CharT, _Traits, _Alloc >::pos_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos | ( | pos_type | , | |
ios_base::openmode | = ios_base::in | ios_base::out | |||
) | [inline, protected, virtual] |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
pos_type
that represents an invalid stream position. Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 196 of file sstream.tcc.
References std::basic_stringbuf< _CharT, _Traits, _Alloc >::_M_mode, std::basic_streambuf< _CharT, _Traits >::eback(), std::basic_streambuf< _CharT, _Traits >::egptr(), std::basic_streambuf< _CharT, _Traits >::gbump(), std::basic_streambuf< _CharT, _Traits >::gptr(), std::ios_base::in, std::ios_base::out, std::basic_streambuf< _CharT, _Traits >::pbase(), std::basic_streambuf< _CharT, _Traits >::pbump(), and std::basic_streambuf< _CharT, _Traits >::pptr().
virtual __streambuf_type* std::basic_stringbuf< _CharT, _Traits, _Alloc >::setbuf | ( | char_type * | __s, | |
streamsize | __n | |||
) | [inline, protected, virtual] |
Manipulates the buffer.
s | Pointer to a buffer area. | |
n | Size of s. |
this
s
is used as a buffer; see http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25s02.html for more.
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 196 of file sstream.
References std::basic_string< _CharT, _Traits, _Alloc >::clear().
void std::basic_streambuf< _CharT , _Traits >::setg | ( | char_type * | __gbeg, | |
char_type * | __gnext, | |||
char_type * | __gend | |||
) | [inline, protected, inherited] |
void std::basic_streambuf< _CharT , _Traits >::setp | ( | char_type * | __pbeg, | |
char_type * | __pend | |||
) | [inline, protected, inherited] |
int_type std::basic_streambuf< _CharT , _Traits >::sgetc | ( | ) | [inline, inherited] |
streamsize std::basic_streambuf< _CharT , _Traits >::sgetn | ( | char_type * | __s, | |
streamsize | __n | |||
) | [inline, inherited] |
virtual streamsize std::basic_stringbuf< _CharT, _Traits, _Alloc >::showmanyc | ( | ) | [inline, protected, virtual] |
Investigating the data available.
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
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, _Traits >.
int_type std::basic_streambuf< _CharT , _Traits >::snextc | ( | ) | [inline, inherited] |
int_type std::basic_streambuf< _CharT , _Traits >::sputbackc | ( | char_type | __c | ) | [inline, inherited] |
Pushing characters back into the input stream.
c | The character to push back. |
int_type std::basic_streambuf< _CharT , _Traits >::sputc | ( | char_type | __c | ) | [inline, inherited] |
Entry point for all single-character output functions.
c | A character to output. |
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)
.
streamsize std::basic_streambuf< _CharT , _Traits >::sputn | ( | const char_type * | __s, | |
streamsize | __n | |||
) | [inline, inherited] |
void std::basic_streambuf< _CharT , _Traits >::stossc | ( | ) | [inline, inherited] |
Tosses a character.
Advances the read pointer, ignoring the character that would have been read.
void std::basic_stringbuf< _CharT, _Traits, _Alloc >::str | ( | const __string_type & | __s | ) | [inline] |
Setting a new buffer.
s | The string to use as a new sequence. |
Definition at line 144 of file sstream.
References std::basic_string< _CharT, _Traits, _Alloc >::assign(), std::basic_string< _CharT, _Traits, _Alloc >::data(), and std::basic_string< _CharT, _Traits, _Alloc >::size().
__string_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::str | ( | ) | const [inline] |
int_type std::basic_streambuf< _CharT , _Traits >::sungetc | ( | ) | [inline, inherited] |
Moving backwards in the input stream.
virtual int std::basic_streambuf< _CharT , _Traits >::sync | ( | void | ) | [inline, protected, virtual, inherited] |
Synchronizes the buffer arrays with the controlled sequences.
Reimplemented in std::basic_filebuf< _CharT, _Traits >, __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >, and std::basic_filebuf< _CharT, _Traits >.
virtual int_type std::basic_streambuf< _CharT , _Traits >::uflow | ( | ) | [inline, protected, virtual, inherited] |
Fetches more data from the controlled sequence.
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 in __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >.
basic_stringbuf< _CharT, _Traits, _Alloc >::int_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::underflow | ( | ) | [inline, protected, virtual] |
Fetches more data from the controlled sequence.
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
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 131 of file sstream.tcc.
References std::basic_stringbuf< _CharT, _Traits, _Alloc >::_M_mode, std::basic_streambuf< _CharT, _Traits >::egptr(), std::basic_streambuf< _CharT, _Traits >::gptr(), and std::ios_base::in.
virtual streamsize std::basic_streambuf< _CharT , _Traits >::xsgetn | ( | char_type * | __s, | |
streamsize | __n | |||
) | [protected, virtual, inherited] |
Multiple character extraction.
s | A buffer area. | |
n | Maximum number of characters to assign. |
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 >, __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >, and std::basic_filebuf< _CharT, _Traits >.
virtual streamsize std::basic_streambuf< _CharT , _Traits >::xsputn | ( | const char_type * | __s, | |
streamsize | __n | |||
) | [protected, virtual, inherited] |
Multiple character insertion.
s | A buffer area. | |
n | Maximum number of characters to write. |
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 >, __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >, and std::basic_filebuf< _CharT, _Traits >.
locale std::basic_streambuf< _CharT , _Traits >::_M_buf_locale [protected, inherited] |
Current locale setting.
Definition at line 187 of file streambuf.
Referenced by std::basic_filebuf< _CharT, _Traits >::basic_filebuf().
char_type* std::basic_streambuf< _CharT , _Traits >::_M_in_beg [protected, inherited] |
char_type* std::basic_streambuf< _CharT , _Traits >::_M_in_cur [protected, inherited] |
char_type* std::basic_streambuf< _CharT , _Traits >::_M_in_end [protected, inherited] |
ios_base::openmode std::basic_stringbuf< _CharT, _Traits, _Alloc >::_M_mode [protected] |
Place to stash in || out || in | out settings for current stringbuf.
Definition at line 77 of file sstream.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::underflow().
char_type* std::basic_streambuf< _CharT , _Traits >::_M_out_beg [protected, inherited] |
char_type* std::basic_streambuf< _CharT , _Traits >::_M_out_cur [protected, inherited] |
char_type* std::basic_streambuf< _CharT , _Traits >::_M_out_end [protected, inherited] |