Public Types | |
typedef char_traits< char > | Traits |
typedef basic_streambuf< char, Traits > | Base |
typedef char | char_type |
typedef char_traits< char > | traits_type |
typedef traits_type::int_type | int_type |
typedef traits_type::pos_type | pos_type |
typedef traits_type::off_type | off_type |
typedef ctype< char_type > | ctype_type |
typedef basic_streambuf< char_type, traits_type > | streambuf_type |
typedef traits_type::state_type | state_type |
Public Member Functions | |
strstreambuf (streamsize initial_capacity=0) | |
strstreambuf (void *(*alloc)(size_t), void(*__free)(void *)) | |
strstreambuf (char *__get, streamsize n, char *__put=0) | |
strstreambuf (signed char *__get, streamsize n, signed char *__put=0) | |
strstreambuf (unsigned char *__get, streamsize n, unsigned char *__put=0) | |
strstreambuf (const char *__get, streamsize n) | |
strstreambuf (const signed char *__get, streamsize n) | |
strstreambuf (const unsigned char *__get, streamsize n) | |
virtual | ~strstreambuf () |
void | freeze (bool=true) |
char * | str () |
int | pcount () const |
locale | pubimbue (const locale &__loc) |
Entry point for imbue(). | |
locale | getloc () const |
Locale access. | |
streambuf_type * | 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) |
pos_type | pubseekpos (pos_type sp, ios_base::openmode __mode=ios_base::in|ios_base::out) |
int | pubsync () |
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. | |
Protected Member Functions | |
virtual int_type | overflow (int_type c=Traits::eof()) |
virtual int_type | pbackfail (int_type c=Traits::eof()) |
virtual int_type | underflow () |
Fetches more data from the controlled sequence. | |
virtual Base * | setbuf (char *__buf, streamsize n) |
Maniuplates the buffer. | |
virtual pos_type | seekoff (off_type __off, ios_base::seekdir __dir, ios_base::openmode __mode=ios_base::in|ios_base::out) |
virtual pos_type | seekpos (pos_type position, ios_base::openmode __mode=ios_base::in|ios_base::out) |
void | M_pback_create () |
void | M_pback_destroy () throw () |
void | M_in_cur_move (off_type n) |
void | M_out_cur_move (off_type n) |
off_type | M_out_buf_size () |
basic_streambuf () | |
Base constructor. | |
char_type * | eback () const |
Access to the get area. | |
char_type * | gptr () const |
char_type * | egptr () const |
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. | |
char_type * | pbase () const |
Access to the put area. | |
char_type * | pptr () const |
char_type * | epptr () const |
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 int_type | pbackfail (int_type=traits_type::eof()) |
Tries to back up the input sequence. | |
virtual streamsize | xsputn (const char_type *s, streamsize n) |
Multiple character insertion. | |
virtual int_type | overflow (int_type=traits_type::eof()) |
Consumes data from the buffer; writes to the controlled sequence. | |
Protected Attributes | |
char_type * | M_buf |
size_t | M_buf_size |
size_t | M_buf_size_opt |
bool | M_buf_unified |
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 |
ios_base::openmode | M_mode |
locale | M_buf_locale |
bool | M_buf_locale_init |
char_type | M_pback [S_pback_size] |
char_type * | M_pback_cur_save |
char_type * | M_pback_end_save |
bool | M_pback_init |
fpos< state_type > | M_pos |
Static Protected Attributes | |
static const size_t | S_pback_size |
Private Member Functions | |
char * | M_alloc (size_t) |
void | M_free (char *) |
void | M_setup (char *__get, char *__put, streamsize n) |
Private Attributes | |
bool | M_dynamic: 1 |
bool | M_frozen: 1 |
bool | M_constant: 1 |
Friends | |
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 > |
Definition at line 62 of file strstream.
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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. |
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Base constructor. Only called from derived constructors, and sets up all the buffer data to zero, including the pointers described in the basic_streambuf class description. Note that, as a result,
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Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 599 of file streambuf. Referenced by overflow(), pbackfail(), seekoff(), str(), underflow(), and ~strstreambuf(). |
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Moving the read position.
Definition at line 615 of file streambuf. Referenced by pbackfail(). |
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Locale access.
loc is returned. Otherwise the global locale in effect at the time of construction is returned.
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Changes translations.
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Looking ahead into the stream.
showmanyc() .
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Consumes data from the buffer; writes to the controlled sequence.
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).
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Tries to back up the input sequence.
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Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 648 of file streambuf. Referenced by overflow(), pcount(), and seekoff(). |
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Moving the write position.
Definition at line 664 of file streambuf. Referenced by overflow(), and seekoff(). |
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Entry point for imbue().
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Entry points for derived buffer functions.
The public versions of |
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Getting the next character.
uflow() . |
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Alters the stream positions. Each derived class provides its own appropriate behavior.
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Alters the stream positions. Each derived class provides its own appropriate behavior.
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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.
Reimplemented from std::basic_streambuf< char, char_traits< char > >. Definition at line 225 of file strstream.cc. |
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Setting the three read area pointers.
Definition at line 626 of file streambuf. Referenced by M_setup(), overflow(), seekoff(), strstreambuf(), and underflow(). |
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Setting the three write area pointers.
Definition at line 674 of file streambuf. Referenced by M_setup(), overflow(), seekoff(), and strstreambuf(). |
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Getting the next character.
underflow() . Does not move the read position after fetching the character.
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Entry point for xsgetn.
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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
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Getting the next character.
sbumpc() , and if that function returns traits::eof() , so does this function. Otherwise, sgetc() .
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Pushing characters back into the input stream.
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Entry point for all single-character 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 |
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Entry point for all single-character output functions.
Returns xsputn(s,n). The effect is to write s[0] through s[n-1] to the output sequence, if possible. |
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Moving backwards in the input stream.
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Synchronizes the buffer arrays with the controlled sequences.
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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.
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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 std::basic_streambuf< char, char_traits< char > >. Definition at line 213 of file strstream.cc. References std::basic_streambuf< char, char_traits< char > >::eback(), std::basic_streambuf< char, char_traits< char > >::egptr(), std::basic_streambuf< char, char_traits< char > >::gptr(), std::basic_streambuf< char, char_traits< char > >::pptr(), and std::basic_streambuf< char, char_traits< char > >::setg(). |
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Multiple character extraction.
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. |
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Multiple character insertion.
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. |