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 62 of file sstream.
typedef _CharT 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 basic_streambuf.
typedef traits_type::int_type 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 basic_streambuf.
typedef traits_type::off_type 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 basic_streambuf.
typedef traits_type::pos_type 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 basic_streambuf.
typedef _Traits 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 basic_streambuf.
basic_stringbuf | ( | ios_base::openmode | __mode = ios_base::in | ios_base::out |
) | [inline, explicit] |
basic_stringbuf | ( | const __string_type & | __str, | |
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [inline, explicit] |
Starts with an existing string buffer.
str | A string to copy as a starting buffer. | |
mode | Whether the buffer can read, or write, or both. |
Definition at line 113 of file sstream.
References basic_stringbuf::_M_stringbuf_init().
char_type* 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 465 of file streambuf.
References basic_streambuf::_M_in_beg.
Referenced by basic_filebuf::_M_destroy_pback(), basic_filebuf::imbue(), basic_stringbuf::overflow(), basic_stringbuf::seekoff(), basic_filebuf::seekoff(), basic_stringbuf::seekpos(), basic_streambuf::sputbackc(), basic_filebuf::underflow(), and basic_filebuf::xsgetn().
char_type* 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 471 of file streambuf.
References basic_streambuf::_M_in_end.
Referenced by basic_filebuf::_M_create_pback(), basic_stringbuf::_M_update_egptr(), basic_streambuf::in_avail(), basic_streambuf::sbumpc(), basic_stringbuf::seekoff(), basic_filebuf::seekoff(), basic_stringbuf::seekpos(), basic_streambuf::sgetc(), basic_stringbuf::showmanyc(), basic_streambuf::stossc(), basic_stringbuf::str(), basic_stringbuf::underflow(), basic_filebuf::underflow(), basic_streambuf::xsgetn(), and basic_filebuf::xsgetn().
void gbump | ( | int | __n | ) | [inline, protected, inherited] |
Moving the read position.
n | The delta by which to move. |
Definition at line 481 of file streambuf.
References basic_streambuf::_M_in_cur.
Referenced by basic_stringbuf::pbackfail(), basic_streambuf::sbumpc(), basic_stringbuf::seekpos(), basic_streambuf::sputbackc(), basic_streambuf::sungetc(), basic_streambuf::uflow(), basic_streambuf::xsgetn(), and basic_filebuf::xsgetn().
locale getloc | ( | ) | const [inline, inherited] |
Locale access.
loc
is returned. Otherwise the global locale in effect at the time of construction is returned.
Definition at line 228 of file streambuf.
References basic_streambuf::_M_buf_locale.
char_type* 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 468 of file streambuf.
References basic_streambuf::_M_in_cur.
Referenced by basic_filebuf::_M_create_pback(), basic_filebuf::_M_destroy_pback(), basic_stringbuf::_M_update_egptr(), basic_streambuf::in_avail(), basic_stringbuf::pbackfail(), basic_filebuf::pbackfail(), basic_stringbuf::seekoff(), basic_stringbuf::showmanyc(), basic_filebuf::showmanyc(), basic_streambuf::sputbackc(), basic_streambuf::sungetc(), basic_streambuf::xsgetn(), and basic_filebuf::xsgetn().
virtual void imbue | ( | const locale & | ) | [inline, protected, virtual, inherited] |
Changes translations.
loc | A new locale. |
Reimplemented in basic_filebuf.
Definition at line 559 of file streambuf.
Referenced by basic_streambuf::pubimbue().
streamsize in_avail | ( | ) | [inline, inherited] |
Looking ahead into the stream.
showmanyc()
.
Definition at line 268 of file streambuf.
References basic_streambuf::egptr(), basic_streambuf::gptr(), and basic_streambuf::showmanyc().
basic_stringbuf< _CharT, _Traits, _Alloc >::int_type overflow | ( | int_type | __c = traits_type::eof() |
) | [protected, virtual] |
Consumes data from the buffer; writes to the controlled sequence.
c | An additional character to consume. |
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).
Reimplemented from basic_streambuf.
Definition at line 86 of file sstream.tcc.
References basic_stringbuf::_M_mode, basic_stringbuf::_M_string, basic_stringbuf::_M_sync(), basic_string::assign(), basic_string::capacity(), basic_string::data(), basic_streambuf::eback(), basic_streambuf::epptr(), std::max(), basic_string::max_size(), std::min(), ios_base::out, basic_streambuf::pbase(), basic_streambuf::pptr(), basic_string::reserve(), basic_streambuf::sputc(), and basic_string::swap().
basic_stringbuf< _CharT, _Traits, _Alloc >::int_type pbackfail | ( | int_type | __c = traits_type::eof() |
) | [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 basic_streambuf.
Definition at line 52 of file sstream.tcc.
References basic_stringbuf::_M_mode, basic_streambuf::gbump(), basic_streambuf::gptr(), and ios_base::out.
char_type* 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 512 of file streambuf.
References basic_streambuf::_M_out_beg.
Referenced by basic_stringbuf::overflow(), basic_filebuf::overflow(), basic_stringbuf::seekoff(), basic_stringbuf::seekpos(), and basic_filebuf::xsputn().
void pbump | ( | int | __n | ) | [inline, protected, inherited] |
Moving the write position.
n | The delta by which to move. |
Definition at line 528 of file streambuf.
References basic_streambuf::_M_out_cur.
Referenced by basic_stringbuf::_M_sync(), basic_filebuf::overflow(), basic_stringbuf::seekpos(), basic_streambuf::sputc(), and basic_streambuf::xsputn().
Entry point for imbue().
loc | The new locale. |
Definition at line 211 of file streambuf.
References basic_streambuf::_M_buf_locale, and basic_streambuf::imbue().
pos_type pubseekoff | ( | off_type | __off, | |
ios_base::seekdir | __way, | |||
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [inline, inherited] |
Locale access.
loc
is returned. Otherwise the global locale in effect at the time of construction is returned.
Definition at line 245 of file streambuf.
References basic_streambuf::seekoff().
pos_type pubseekpos | ( | pos_type | __sp, | |
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [inline, inherited] |
Locale access.
loc
is returned. Otherwise the global locale in effect at the time of construction is returned.
Definition at line 250 of file streambuf.
References basic_streambuf::seekpos().
__streambuf_type* 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 241 of file streambuf.
References basic_streambuf::setbuf().
int pubsync | ( | ) | [inline, inherited] |
Locale access.
loc
is returned. Otherwise the global locale in effect at the time of construction is returned.
Definition at line 255 of file streambuf.
References basic_streambuf::sync().
Referenced by basic_istream::sync().
int_type sbumpc | ( | ) | [inline, inherited] |
Getting the next character.
uflow()
.
Definition at line 300 of file streambuf.
References basic_streambuf::egptr(), basic_streambuf::gbump(), and basic_streambuf::uflow().
Referenced by basic_istream::getline(), basic_istream::ignore(), istreambuf_iterator::operator++(), and std::operator>>().
basic_stringbuf< _CharT, _Traits, _Alloc >::pos_type seekoff | ( | off_type | __off, | |
ios_base::seekdir | __way, | |||
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [protected, virtual] |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
pos_type
that represents an invalid stream position. Reimplemented from basic_streambuf.
Definition at line 147 of file sstream.tcc.
References basic_stringbuf::_M_mode, basic_stringbuf::_M_update_egptr(), ios_base::cur, basic_streambuf::eback(), basic_streambuf::egptr(), ios_base::end, basic_streambuf::gptr(), ios_base::in, ios_base::out, basic_streambuf::pbase(), and basic_streambuf::pptr().
basic_stringbuf< _CharT, _Traits, _Alloc >::pos_type seekpos | ( | pos_type | __sp, | |
ios_base::openmode | __mode = ios_base::in | ios_base::out | |||
) | [protected, virtual] |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
pos_type
that represents an invalid stream position. Reimplemented from basic_streambuf.
Definition at line 194 of file sstream.tcc.
References basic_stringbuf::_M_mode, basic_stringbuf::_M_update_egptr(), basic_streambuf::eback(), basic_streambuf::egptr(), basic_streambuf::gbump(), ios_base::in, ios_base::out, basic_streambuf::pbase(), and basic_streambuf::pbump().
virtual __streambuf_type* 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++/27_io/howto.html#2 for more.
Reimplemented from basic_streambuf.
Definition at line 204 of file sstream.
References basic_stringbuf::_M_string, basic_stringbuf::_M_sync(), and basic_string::clear().
void setg | ( | char_type * | __gbeg, | |
char_type * | __gnext, | |||
char_type * | __gend | |||
) | [inline, protected, inherited] |
Setting the three read area pointers.
gbeg | A pointer. | |
gnext | A pointer. | |
gend | A pointer. |
Definition at line 492 of file streambuf.
References basic_streambuf::_M_in_beg, basic_streambuf::_M_in_cur, and basic_streambuf::_M_in_end.
Referenced by basic_filebuf::_M_create_pback(), basic_filebuf::_M_destroy_pback(), basic_filebuf::_M_set_buffer(), basic_stringbuf::_M_sync(), and basic_stringbuf::_M_update_egptr().
Setting the three write area pointers.
pbeg | A pointer. | |
pend | A pointer. |
Definition at line 538 of file streambuf.
References basic_streambuf::_M_out_beg, basic_streambuf::_M_out_cur, and basic_streambuf::_M_out_end.
Referenced by basic_filebuf::_M_set_buffer(), and basic_stringbuf::_M_sync().
int_type sgetc | ( | ) | [inline, inherited] |
Getting the next character.
underflow()
. Does not move the read position after fetching the character.
Definition at line 322 of file streambuf.
References basic_streambuf::egptr(), and basic_streambuf::underflow().
Referenced by std::__copy_streambufs(), basic_istream::get(), basic_istream::getline(), basic_istream::ignore(), and basic_istream::sentry::sentry().
streamsize sgetn | ( | char_type * | __s, | |
streamsize | __n | |||
) | [inline, inherited] |
Entry point for xsgetn.
s | A buffer area. | |
n | A count. |
Definition at line 341 of file streambuf.
References basic_streambuf::xsgetn().
virtual streamsize 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 basic_streambuf.
Definition at line 172 of file sstream.
References basic_stringbuf::_M_mode, basic_stringbuf::_M_update_egptr(), basic_streambuf::egptr(), basic_streambuf::gptr(), and ios_base::in.
int_type snextc | ( | ) | [inline, inherited] |
Getting the next character.
sbumpc()
, and if that function returns traits::eof()
, so does this function. Otherwise, sgetc()
.
Definition at line 282 of file streambuf.
Referenced by std::__copy_streambufs(), basic_istream::get(), basic_istream::getline(), basic_istream::ignore(), and basic_istream::sentry::sentry().
Pushing characters back into the input stream.
c | The character to push back. |
Definition at line 355 of file streambuf.
References basic_streambuf::eback(), basic_streambuf::gbump(), and basic_streambuf::gptr().
Referenced by std::operator>>(), and basic_istream::putback().
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)
.
Definition at line 407 of file streambuf.
References basic_streambuf::epptr(), basic_streambuf::overflow(), basic_streambuf::pbump(), and basic_streambuf::pptr().
Referenced by std::__copy_streambufs(), basic_istream::get(), ostreambuf_iterator::operator=(), and basic_stringbuf::overflow().
streamsize sputn | ( | const char_type * | __s, | |
streamsize | __n | |||
) | [inline, inherited] |
Entry point for all single-character output functions.
s | A buffer read area. | |
n | A count. |
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.
References basic_streambuf::xsputn().
void 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
_GLIBCXX_DEPRECATED
to make this visible; see c++config.h. Definition at line 769 of file streambuf.
References basic_streambuf::egptr(), and basic_streambuf::uflow().
void str | ( | const __string_type & | __s | ) | [inline] |
Setting a new buffer.
s | The string to use as a new sequence. |
Definition at line 152 of file sstream.
References basic_stringbuf::_M_mode, basic_stringbuf::_M_string, basic_stringbuf::_M_stringbuf_init(), basic_string::assign(), basic_string::data(), and basic_string::size().
__string_type str | ( | ) | const [inline] |
Copying out the string buffer.
Definition at line 128 of file sstream.
References basic_stringbuf::_M_string, basic_streambuf::egptr(), and basic_streambuf::pptr().
Referenced by basic_stringstream::str(), basic_ostringstream::str(), and basic_istringstream::str().
int_type sungetc | ( | ) | [inline, inherited] |
Moving backwards in the input stream.
Definition at line 380 of file streambuf.
References basic_streambuf::gbump(), basic_streambuf::gptr(), and basic_streambuf::pbackfail().
Referenced by basic_istream::unget().
virtual int sync | ( | void | ) | [inline, protected, virtual, inherited] |
Synchronizes the buffer arrays with the controlled sequences.
Reimplemented in stdio_sync_filebuf, and basic_filebuf.
Definition at line 610 of file streambuf.
Referenced by basic_streambuf::pubsync().
virtual int_type 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 stdio_sync_filebuf.
Definition at line 683 of file streambuf.
References basic_streambuf::gbump().
Referenced by basic_streambuf::sbumpc(), basic_streambuf::stossc(), and basic_streambuf::xsgetn().
basic_stringbuf< _CharT, _Traits, _Alloc >::int_type underflow | ( | ) | [protected, virtual] |
Fetches more data from the controlled sequence.
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
Reimplemented from basic_streambuf.
Definition at line 129 of file sstream.tcc.
References basic_stringbuf::_M_mode, basic_stringbuf::_M_update_egptr(), basic_streambuf::egptr(), and ios_base::in.
streamsize 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 stdio_sync_filebuf, and basic_filebuf.
Definition at line 50 of file streambuf.tcc.
References std::copy(), basic_streambuf::egptr(), basic_streambuf::gbump(), basic_streambuf::gptr(), std::min(), and basic_streambuf::uflow().
Referenced by basic_streambuf::sgetn(), and basic_filebuf::xsgetn().
streamsize 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 stdio_sync_filebuf, and basic_filebuf.
Definition at line 84 of file streambuf.tcc.
References std::copy(), basic_streambuf::epptr(), std::min(), basic_streambuf::overflow(), basic_streambuf::pbump(), and basic_streambuf::pptr().
Referenced by basic_streambuf::sputn(), and basic_filebuf::xsputn().
locale _M_buf_locale [protected, inherited] |
Locale access.
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::basic_filebuf(), basic_streambuf::getloc(), and basic_streambuf::pubimbue().
Locale access.
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::eback(), and basic_streambuf::setg().
Locale access.
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::gbump(), basic_streambuf::gptr(), and basic_streambuf::setg().
Locale access.
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::egptr(), and basic_streambuf::setg().
char_type* _M_out_beg [protected, inherited] |
Locale access.
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::pbase(), and basic_streambuf::setp().
char_type* _M_out_cur [protected, inherited] |
Locale access.
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::pbump(), basic_streambuf::pptr(), and basic_streambuf::setp().
char_type* _M_out_end [protected, inherited] |
Locale access.
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::epptr(), and basic_streambuf::setp().