Definition at line 52 of file stdio_filebuf.h.
typedef _CharT __gnu_cxx::stdio_filebuf< _CharT, _Traits >::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_filebuf< _CharT, _Traits >.
Definition at line 56 of file stdio_filebuf.h.
typedef traits_type::int_type __gnu_cxx::stdio_filebuf< _CharT, _Traits >::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_filebuf< _CharT, _Traits >.
Definition at line 58 of file stdio_filebuf.h.
typedef traits_type::off_type __gnu_cxx::stdio_filebuf< _CharT, _Traits >::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_filebuf< _CharT, _Traits >.
Definition at line 60 of file stdio_filebuf.h.
typedef traits_type::pos_type __gnu_cxx::stdio_filebuf< _CharT, _Traits >::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_filebuf< _CharT, _Traits >.
Definition at line 59 of file stdio_filebuf.h.
typedef _Traits __gnu_cxx::stdio_filebuf< _CharT, _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 std::basic_filebuf< _CharT, _Traits >.
Definition at line 57 of file stdio_filebuf.h.
__gnu_cxx::stdio_filebuf< _CharT, _Traits >::stdio_filebuf | ( | ) | [inline] |
deferred initialization
Definition at line 67 of file stdio_filebuf.h.
__gnu_cxx::stdio_filebuf< _CharT, _Traits >::stdio_filebuf | ( | int | __fd, | |
std::ios_base::openmode | __mode, | |||
size_t | __size = static_cast<size_t>(BUFSIZ) | |||
) | [inline] |
fd | An open file descriptor. | |
mode | Same meaning as in a standard filebuf. | |
size | Optimal or preferred size of internal buffer, in chars. |
Definition at line 129 of file stdio_filebuf.h.
References std::basic_filebuf< _CharT, _Traits >::is_open().
__gnu_cxx::stdio_filebuf< _CharT, _Traits >::stdio_filebuf | ( | std::__c_file * | __f, | |
std::ios_base::openmode | __mode, | |||
size_t | __size = static_cast<size_t>(BUFSIZ) | |||
) | [inline] |
f | An open FILE* . | |
mode | Same meaning as in a standard filebuf. | |
size | Optimal or preferred size of internal buffer, in chars. Defaults to system's BUFSIZ . |
FILE*
. The FILE*
will not be automatically closed when the stdio_filebuf is closed/destroyed.
Definition at line 145 of file stdio_filebuf.h.
References std::basic_filebuf< _CharT, _Traits >::is_open().
__gnu_cxx::stdio_filebuf< _CharT, _Traits >::~stdio_filebuf | ( | ) | [inline, virtual] |
Closes the external data stream if the file descriptor constructor was used.
Definition at line 124 of file stdio_filebuf.h.
__filebuf_type* std::basic_filebuf< _CharT , _Traits >::close | ( | ) | throw () [inherited] |
Closes the currently associated file.
this
on success, NULL on failure
If a "put buffer area" exists, overflow(eof)
is called to flush all the characters. The file is then closed.
If any operations fail, this function also fails.
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 478 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 484 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 531 of file streambuf.
Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow().
int __gnu_cxx::stdio_filebuf< _CharT, _Traits >::fd | ( | ) | [inline] |
Definition at line 110 of file stdio_filebuf.h.
std::__c_file* __gnu_cxx::stdio_filebuf< _CharT, _Traits >::file | ( | ) | [inline] |
Definition at line 120 of file stdio_filebuf.h.
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 494 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 481 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_filebuf< _CharT , _Traits >::imbue | ( | const locale & | ) | [protected, virtual, inherited] |
Changes translations.
loc | A new locale. |
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
streamsize std::basic_streambuf< _CharT , _Traits >::in_avail | ( | ) | [inline, inherited] |
bool std::basic_filebuf< _CharT , _Traits >::is_open | ( | ) | const throw () [inline, inherited] |
Returns true if the external file is open.
Definition at line 248 of file fstream.
Referenced by __gnu_cxx::stdio_filebuf< _CharT, _Traits >::stdio_filebuf().
__filebuf_type* std::basic_filebuf< _CharT , _Traits >::open | ( | const char * | __s, | |
ios_base::openmode | __mode | |||
) | [inherited] |
Opens an external file.
s | The name of the file. | |
mode | The open mode flags. |
this
on success, NULL on failureTable 92, adapted here, gives the relation between openmode combinations and the equivalent fopen() flags. (NB: lines in|out|app and binary|in|out|app per DR 596) +---------------------------------------------------------+ | ios_base Flag combination stdio equivalent | |binary in out trunc app | +---------------------------------------------------------+ | + "w" | | + + "a" | | + + "w" | | + "r" | | + + "r+" | | + + + "w+" | | + + + "a+" | +---------------------------------------------------------+ | + + "wb" | | + + + "ab" | | + + + "wb" | | + + "rb" | | + + + "r+b" | | + + + + "w+b" | | + + + + "a+b" | +---------------------------------------------------------+
virtual int_type std::basic_filebuf< _CharT , _Traits >::overflow | ( | int_type | = _Traits::eof() |
) | [protected, virtual, inherited] |
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 std::basic_streambuf< _CharT, _Traits >.
virtual int_type std::basic_filebuf< _CharT , _Traits >::pbackfail | ( | int_type | = _Traits::eof() |
) | [protected, virtual, inherited] |
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 >.
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 525 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 541 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 528 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] |
virtual pos_type std::basic_filebuf< _CharT , _Traits >::seekoff | ( | off_type | , | |
ios_base::seekdir | , | |||
ios_base::openmode | = ios_base::in | ios_base::out | |||
) | [protected, virtual, inherited] |
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 >.
virtual pos_type std::basic_filebuf< _CharT , _Traits >::seekpos | ( | pos_type | , | |
ios_base::openmode | = ios_base::in | ios_base::out | |||
) | [protected, virtual, inherited] |
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 >.
virtual __streambuf_type* std::basic_filebuf< _CharT , _Traits >::setbuf | ( | char_type * | __s, | |
streamsize | __n | |||
) | [protected, virtual, inherited] |
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 std::basic_streambuf< _CharT, _Traits >.
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_filebuf< _CharT , _Traits >::showmanyc | ( | ) | [protected, virtual, inherited] |
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.
See http://gcc.gnu.org/ml/libstdc++/2002-05/msg00168.html
_GLIBCXX_DEPRECATED
to make this visible; see c++config.h. int_type std::basic_streambuf< _CharT , _Traits >::sungetc | ( | ) | [inline, inherited] |
Moving backwards in the input stream.
virtual int std::basic_filebuf< _CharT , _Traits >::sync | ( | void | ) | [protected, virtual, inherited] |
Synchronizes the buffer arrays with the controlled sequences.
Reimplemented from std::basic_streambuf< _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 >.
virtual int_type std::basic_filebuf< _CharT , _Traits >::underflow | ( | ) | [protected, virtual, inherited] |
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< _CharT, _Traits >.
virtual streamsize std::basic_filebuf< _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 from std::basic_streambuf< _CharT, _Traits >.
virtual streamsize std::basic_filebuf< _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 from std::basic_streambuf< _CharT, _Traits >.
locale std::basic_streambuf< _CharT , _Traits >::_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 207 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] |
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] |