typedef CharT char_type

typedef Traits traits_type

typedef Alloc allocator_type

typedef traits_type::int_type int_type

typedef traits_type::pos_type pos_type

typedef traits_type::off_type off_type

typedef basic_streambuf< char_type, traits_type > streambuf_type

typedef basic_string< char_type, Traits, Alloc > string_type

typedef string_type::size_type size_type

basic_stringbuf (ios_base::openmode __mode=ios_base::in|ios_base::out)

Starts with an empty string buffer. basic_stringbuf (const string_type &str, ios_base::openmode __mode=ios_base::in|ios_base::out)

Starts with an existing string buffer. string_type str () const

Copying out the string buffer. void str (const string_type &s)

Setting a new buffer. streamsize in_avail ()

Looking ahead into the stream. int_type snextc ()

Getting the next character. 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 sputbackc (char_type c)

Pushing characters back into the input stream. int_type sungetc ()

Moving backwards in 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.

void M_stringbuf_init (ios_base::openmode __mode)

virtual int_type underflow ()

Fetches more data from the controlled sequence. virtual int_type pbackfail (int_type c=traits_type::eof())

Tries to back up the input sequence. virtual int_type overflow (int_type c=traits_type::eof())

Consumes data from the buffer; writes to the controlled sequence. virtual streambuf_type * setbuf (char_type *s, streamsize n)

Manipulates the buffer. virtual pos_type seekoff (off_type __off, ios_base::seekdir __way, ios_base::openmode __mode=ios_base::in|ios_base::out)

virtual pos_type seekpos (pos_type sp, ios_base::openmode __mode=ios_base::in|ios_base::out)

void M_sync (char_type *__base, size_type __i, size_type __o)

void M_update_egptr ()

void gbump (int n)

Moving the read position. void setg (char_type *__gbeg, char_type *__gnext, char_type *__gend)

Setting the three read area pointers. void pbump (int n)

Moving the write position. void setp (char_type *__pbeg, char_type *__pend)

Setting the three write area pointers. virtual void imbue (const locale &)

Changes translations. virtual pos_type seekoff (off_type, ios_base::seekdir, ios_base::openmode=ios_base::in|ios_base::out)

Alters the stream positions. virtual pos_type seekpos (pos_type, ios_base::openmode=ios_base::in|ios_base::out)

Alters the stream positions. virtual int sync ()

Synchronizes the buffer arrays with the controlled sequences. virtual streamsize showmanyc ()

Investigating the data available. virtual streamsize xsgetn (char_type *s, streamsize n)

Multiple character extraction. virtual int_type uflow ()

Fetches more data from the controlled sequence. virtual streamsize xsputn (const char_type *s, streamsize n)

Multiple character insertion.

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.

ios_base::openmode M_mode

string_type M_string

class basic_ios< char_type, traits_type >

class basic_istream< char_type, traits_type >

class basic_ostream< char_type, traits_type >

class istreambuf_iterator< char_type, traits_type >

class ostreambuf_iterator< char_type, traits_type >

The actual work of input and output (for std::string).

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 63 of file sstream.

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 >.

Definition at line 67 of file sstream.

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 >.

Definition at line 72 of file sstream.

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 >.

Definition at line 74 of file sstream.

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 >.

Definition at line 73 of file sstream.

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 >.

Definition at line 68 of file sstream.

Starts with an empty string buffer.

Parameters: mode Whether the buffer can read, or write, or both.

The default constructor initializes the parent class using its own default ctor.

Definition at line 113 of file sstream.

Starts with an existing string buffer.

Parameters: str A string to copy as a starting buffer.

mode Whether the buffer can read, or write, or both.

This constructor initializes the parent class using its own default ctor.

Definition at line 126 of file sstream.

Access to the get area.

These functions are only available to other protected functions, including derived classes.

•

eback() returns the beginning pointer for the input sequence

•

gptr() returns the next pointer for the input sequence

•

egptr() returns the end pointer for the input sequence

Definition at line 452 of file streambuf.

Referenced by std::basic_filebuf< CharT, Traits >::imbue(), std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_destroy_pback(), std::basic_stringbuf< CharT, Traits, Alloc >::overflow(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), std::basic_filebuf< CharT, Traits >::seekoff(), std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sputbackc(), std::basic_filebuf< CharT, Traits >::underflow(), and std::basic_filebuf< CharT, Traits >::xsgetn().

Access to the get area.

These functions are only available to other protected functions, including derived classes.

•

eback() returns the beginning pointer for the input sequence

•

gptr() returns the next pointer for the input sequence

•

egptr() returns the end pointer for the input sequence

Definition at line 458 of file streambuf.

Referenced by std::copy_streambufs(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::in_avail(), std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_create_pback(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sbumpc(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), std::basic_filebuf< CharT, Traits >::seekoff(), std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sgetc(), std::basic_stringbuf< CharT, Traits, Alloc >::str(), std::basic_stringbuf< CharT, Traits, Alloc >::underflow(), std::basic_filebuf< CharT, Traits >::underflow(), and std::basic_streambuf< CharT, Traits >::xsgetn().

Access to the put area.

These functions are only available to other protected functions, including derived classes.

•

pbase() returns the beginning pointer for the output sequence

•

pptr() returns the next pointer for the output sequence

•

epptr() returns the end pointer for the output sequence

Definition at line 505 of file streambuf.

Referenced by std::basic_stringbuf< CharT, Traits, Alloc >::overflow(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sputc(), std::basic_streambuf< CharT, Traits >::xsputn(), and std::basic_filebuf< CharT, Traits >::xsputn().

Moving the read position.

Parameters: n The delta by which to move.

This just advances the read position without returning any data.

Definition at line 468 of file streambuf.

Referenced by std::copy_streambufs(), std::basic_stringbuf< CharT, Traits, Alloc >::pbackfail(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sbumpc(), std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sputbackc(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sungetc(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::uflow(), std::basic_streambuf< CharT, Traits >::xsgetn(), and std::basic_filebuf< CharT, Traits >::xsgetn().

Locale access.

Returns: The current locale in effect.

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

Definition at line 215 of file streambuf.

Access to the get area.

These functions are only available to other protected functions, including derived classes.

•

eback() returns the beginning pointer for the input sequence

•

gptr() returns the next pointer for the input sequence

•

egptr() returns the end pointer for the input sequence

Definition at line 455 of file streambuf.

Referenced by std::copy_streambufs(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::in_avail(), std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_create_pback(), std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_destroy_pback(), std::basic_stringbuf< CharT, Traits, Alloc >::pbackfail(), std::basic_filebuf< CharT, Traits >::pbackfail(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), std::basic_filebuf< CharT, Traits >::showmanyc(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sputbackc(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sungetc(), and std::basic_streambuf< CharT, Traits >::xsgetn().

Changes translations.

Parameters: loc A new locale.

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

Note: Base class version does nothing.

Reimplemented in std::basic_filebuf< CharT, Traits >, and std::basic_filebuf< CharT, enc_char_traits< CharT > >.

Definition at line 546 of file streambuf.

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::pubimbue().

Looking ahead into the stream.

Returns: The number of characters available.

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

Definition at line 255 of file streambuf.

Consumes data from the buffer; writes to the controlled sequence.

Parameters: c An additional character to consume.

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

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

For a formal 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: Base class version does nothing, returns eof().

Reimplemented from std::basic_streambuf< CharT, Traits >.

Definition at line 76 of file sstream.tcc.

References std::basic_streambuf< CharT, Traits >::eback(), std::basic_streambuf< CharT, Traits >::epptr(), std::max(), std::min(), std::ios_base::out, std::basic_streambuf< CharT, Traits >::pbase(), std::basic_streambuf< CharT, Traits >::pptr(), and std::basic_streambuf< CharT, Traits >::sputc().

Tries to back up the input sequence.

Parameters: c The character to be inserted back into the sequence.

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

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

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

Reimplemented from std::basic_streambuf< CharT, Traits >.

Definition at line 47 of file sstream.tcc.

References std::basic_streambuf< CharT, Traits >::gbump(), and std::basic_streambuf< CharT, Traits >::gptr().

Access to the put area.

These functions are only available to other protected functions, including derived classes.

•

pbase() returns the beginning pointer for the output sequence

•

pptr() returns the next pointer for the output sequence

•

epptr() returns the end pointer for the output sequence

Definition at line 499 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(), std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(), and std::basic_filebuf< CharT, Traits >::xsputn().

Moving the write position.

Parameters: n The delta by which to move.

This just advances the write position without returning any data.

Definition at line 515 of file streambuf.

Referenced by std::basic_filebuf< CharT, Traits >::overflow(), std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sputc(), and std::basic_streambuf< CharT, Traits >::xsputn().

Access to the put area.

These functions are only available to other protected functions, including derived classes.

•

pbase() returns the beginning pointer for the output sequence

•

pptr() returns the next pointer for the output sequence

•

epptr() returns the end pointer for the output sequence

Definition at line 502 of file streambuf.

Referenced by std::basic_filebuf< CharT, Traits >::M_convert_to_external(), std::basic_filebuf< CharT, Traits >::M_terminate_output(), std::basic_stringbuf< CharT, Traits, Alloc >::overflow(), std::basic_filebuf< CharT, Traits >::overflow(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::sputc(), std::basic_stringbuf< CharT, Traits, Alloc >::str(), std::basic_filebuf< CharT, Traits >::sync(), std::basic_streambuf< CharT, Traits >::xsputn(), and std::basic_filebuf< CharT, Traits >::xsputn().

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 198 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 232 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 237 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 228 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 242 of file streambuf.

Getting the next character.

Returns: The next character, or eof.

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

Definition at line 287 of file streambuf.

Referenced by std::operator>>().

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.

Definition at line 572 of file streambuf.

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::pubseekoff().

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.

Definition at line 584 of file streambuf.

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::pubseekpos().

Manipulates the buffer.

Parameters: s Pointer to a buffer area.

n Size of s.

Returns: this

If no buffer has already been created, and both s and n are non-zero, then s is used as a buffer; see http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#2 for more.

Reimplemented from std::basic_streambuf< CharT, Traits >.

Definition at line 212 of file sstream.

Setting the three read area pointers.

Parameters: gbeg A pointer.

gnext A pointer.

gend A pointer.

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

Definition at line 479 of file streambuf.

Referenced by std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_create_pback(), std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_destroy_pback(), and std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_set_buffer().

Setting the three write area pointers.

Parameters: pbeg A pointer.

pend A pointer.

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

Definition at line 525 of file streambuf.

Referenced by std::basic_filebuf< CharT, enc_char_traits< CharT > >::M_set_buffer().

Getting the next character.

Returns: The next character, or eof.

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

Definition at line 309 of file streambuf.

Referenced by std::copy_streambufs().

Entry point for xsgetn.

Parameters: s A buffer area.

n A count.

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

Definition at line 328 of file streambuf.

Investigating the data available.

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

Note: Base class version does nothing, returns zero.

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

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

Reimplemented in std::basic_filebuf< CharT, Traits >, and std::basic_filebuf< CharT, enc_char_traits< CharT > >.

Definition at line 619 of file streambuf.

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::in_avail().

Getting the next character.

Returns: The next character, or eof.

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

Definition at line 269 of file streambuf.

Referenced by std::copy_streambufs().

Pushing characters back into the input stream.

Parameters: c The character to push back.

Returns: The previous character, if possible.

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

Definition at line 342 of file streambuf.

Referenced by std::operator>>().

Entry point for all single-character output functions.

Parameters: c A character to output.

Returns: c, if possible.

One of two public output functions.

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

Definition at line 394 of file streambuf.

Referenced by std::copy_streambufs(), and std::basic_stringbuf< CharT, Traits, Alloc >::overflow().

Entry point for all single-character output functions.

Parameters: s A buffer read area.

n A count.

One of two public output functions.

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

Definition at line 420 of file streambuf.

Referenced by std::copy_streambufs().

Setting a new buffer.

Parameters: s The string to use as a new sequence.

Deallocates any previous stored sequence, then copies s to use as a new one.

Definition at line 163 of file sstream.

References std::basic_string< CharT, Traits, Alloc >::assign().

Copying out the string buffer.

Returns: A copy of one of the underlying sequences.

Definition at line 141 of file sstream.

References std::basic_streambuf< CharT, Traits >::egptr(), and std::basic_streambuf< CharT, Traits >::pptr().

Moving backwards in the input stream.

Returns: The previous character, if possible.

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

Definition at line 367 of file streambuf.

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 in __gnu_cxx::stdio_sync_filebuf< CharT, Traits >, std::basic_filebuf< CharT, Traits >, and std::basic_filebuf< CharT, enc_char_traits< CharT > >.

Definition at line 597 of file streambuf.

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::pubsync().

Fetches more data from the controlled sequence.

Returns: The first character from the pending sequence.

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

Reimplemented in __gnu_cxx::stdio_sync_filebuf< CharT, Traits >.

Definition at line 670 of file streambuf.

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::sbumpc(), and std::basic_streambuf< CharT, Traits >::xsgetn().

Fetches more data from the controlled sequence.

Returns: The first character from the pending sequence.

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

For a formal 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: Base class version does nothing, returns eof().

Reimplemented from std::basic_streambuf< CharT, Traits >.

Definition at line 118 of file sstream.tcc.

References std::basic_streambuf< CharT, Traits >::egptr(), and std::ios_base::in.

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 __gnu_cxx::stdio_sync_filebuf< CharT, Traits >, std::basic_filebuf< CharT, Traits >, and std::basic_filebuf< CharT, enc_char_traits< CharT > >.

Definition at line 45 of file streambuf.tcc.

References std::copy(), std::basic_streambuf< CharT, Traits >::egptr(), std::basic_streambuf< CharT, Traits >::gbump(), std::basic_streambuf< CharT, Traits >::gptr(), std::min(), and std::basic_streambuf< CharT, Traits >::uflow().

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::sgetn().

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 __gnu_cxx::stdio_sync_filebuf< CharT, Traits >, std::basic_filebuf< CharT, Traits >, and std::basic_filebuf< CharT, enc_char_traits< CharT > >.

Definition at line 79 of file streambuf.tcc.

References std::copy(), std::basic_streambuf< CharT, Traits >::epptr(), std::min(), std::basic_streambuf< CharT, Traits >::overflow(), std::basic_streambuf< CharT, Traits >::pbump(), and std::basic_streambuf< CharT, Traits >::pptr().

Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::sputn().

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 181 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 169 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 170 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 171 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 172 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 173 of file streambuf.

Entry point for imbue().

Parameters: loc The new locale.

Returns: The previous locale.

Calls the derived imbue(loc).

Definition at line 174 of file streambuf.