#include <ext/stdio_filebuf.h>
Inheritance diagram for __gnu_cxx::stdio_filebuf< CharT, Traits >:
Public Types | |
typedef CharT | char_type |
typedef Traits | traits_type |
typedef traits_type::int_type | int_type |
typedef traits_type::pos_type | pos_type |
typedef traits_type::off_type | off_type |
Public Member Functions | |
stdio_filebuf (int __fd, std::ios_base::openmode __mode, bool __del, size_t size) | |
stdio_filebuf (std::c_file *__f, std::ios_base::openmode __mode, size_t size=static_cast< size_t >(BUFSIZ)) | |
virtual | ~stdio_filebuf () |
int | fd () |
bool | is_open () const throw () |
Returns true if the external file is open. | |
__filebuf_type * | open (const char *s, ios_base::openmode __mode) |
Opens an external file. | |
__filebuf_type * | close () throw () |
Closes the currently associated file. | |
locale | pubimbue (const locale &__loc) |
Entry point for imbue(). | |
locale | getloc () const |
Locale access. | |
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. | |
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) |
Entry points for derived buffer functions. | |
pos_type | pubseekpos (pos_type sp, ios_base::openmode __mode=ios_base::in|ios_base::out) |
Entry points for derived buffer functions. | |
int | pubsync () |
Entry points for derived buffer functions. | |
Protected Member Functions | |
virtual streamsize | showmanyc () |
Investigating the data available. | |
virtual int_type | underflow () |
Fetches more data from the controlled sequence. | |
virtual int_type | uflow () |
Fetches more data from the controlled sequence. | |
virtual int_type | pbackfail (int_type c=Traits::eof()) |
Tries to back up the input sequence. | |
virtual int_type | overflow (int_type c=Traits::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) |
Alters the stream positions. | |
virtual pos_type | seekpos (pos_type position, ios_base::openmode __mode=ios_base::in|ios_base::out) |
Alters the stream positions. | |
virtual int | sync () |
Synchronizes the buffer arrays with the controlled sequences. | |
virtual void | imbue (const locale &__loc) |
Changes translations. | |
virtual streamsize | xsgetn (char_type *s, streamsize n) |
Multiple character extraction. | |
virtual streamsize | xsputn (const char_type *s, streamsize n) |
Multiple character insertion. | |
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. | |
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. |
This GNU extension provides extensions for working with standard C FILE*'s and POSIX file descriptors. It must be instantiated by the user with the type of character used in the file stream, e.g., stdio_filebuf<char>.
Definition at line 52 of file stdio_filebuf.h.
|
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. |
|
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. |
|
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. |
|
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. |
|
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. |
|
Definition at line 120 of file stdio_filebuf.h. |
|
FILE* . The FILE* will not be automatically closed when the stdio_filebuf is closed/destroyed.
Definition at line 145 of file stdio_filebuf.h. |
|
Possibly closes the external data stream, in the case of the file descriptor constructor and Definition at line 115 of file stdio_filebuf.h. |
|
Closes the currently associated file.
If a "put buffer area" exists, If any operations fail, this function also fails. Definition at line 114 of file fstream.tcc. Referenced by std::basic_filebuf< CharT, Traits >::open(), and std::basic_filebuf< CharT, enc_char_traits< CharT > >::~basic_filebuf(). |
|
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 std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(). |
|
Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 605 of file streambuf. Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::in_avail(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), and std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(). |
|
Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 654 of file streambuf. Referenced by std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(). |
|
Definition at line 110 of file stdio_filebuf.h. |
|
Moving the read position.
|
|
Locale access.
loc is returned. Otherwise the global locale in effect at the time of construction is returned.
Definition at line 395 of file streambuf. Referenced by std::basic_ios< CharT, Traits >::copyfmt(), and std::basic_filebuf< CharT, Traits >::showmanyc(). |
|
Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 602 of file streambuf. Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::in_avail(), std::basic_streambuf< CharT, Traits >::sbumpc(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), and std::basic_stringbuf< CharT, Traits, Alloc >::underflow(). |
|
Changes translations.
Reimplemented from std::basic_streambuf< CharT, Traits >. Definition at line 509 of file fstream.tcc. |
|
Looking ahead into the stream.
showmanyc() .
|
|
Returns true if the external file is open.
Definition at line 161 of file fstream. Referenced by std::basic_fstream< CharT, Traits >::is_open(), std::basic_ofstream< CharT, Traits >::is_open(), std::basic_ifstream< CharT, Traits >::is_open(), and std::basic_filebuf< CharT, enc_char_traits< CharT > >::is_open(). |
|
Opens an external file.
[Table 92 gives the relation between openmode combinations and the equivalent fopen() flags, but the table has not been copied yet.] Definition at line 83 of file fstream.tcc. References std::basic_filebuf< CharT, Traits >::close(). |
|
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).
Reimplemented from std::basic_streambuf< CharT, Traits >. Definition at line 253 of file fstream.tcc. |
|
Tries to back up the input sequence.
Reimplemented from std::basic_streambuf< CharT, Traits >. Definition at line 180 of file fstream.tcc. References std::basic_filebuf< CharT, Traits >::underflow(). |
|
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 std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(). |
|
Moving the write position.
|
|
Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 651 of file streambuf. Referenced by std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(). |
|
Entry point for imbue().
Definition at line 378 of file streambuf. Referenced by std::basic_ios< CharT, Traits >::imbue(). |
|
Entry points for derived buffer functions.
The public versions of |
|
Entry points for derived buffer functions.
The public versions of |
|
Entry points for derived buffer functions.
The public versions of |
|
Entry points for derived buffer functions.
The public versions of |
|
Getting the next character.
uflow() .
Definition at line 49 of file streambuf.tcc. References std::basic_streambuf< CharT, Traits >::gptr(), and std::basic_streambuf< CharT, Traits >::uflow(). Referenced by std::operator>>(). |
|
Alters the stream positions. Each derived class provides its own appropriate behavior.
Reimplemented from std::basic_streambuf< CharT, Traits >. Definition at line 430 of file fstream.tcc. References std::max(), and std::basic_filebuf< CharT, Traits >::sync(). Referenced by std::basic_filebuf< CharT, Traits >::seekpos(), and std::basic_filebuf< CharT, enc_char_traits< CharT > >::sync(). |
|
Alters the stream positions. Each derived class provides its own appropriate behavior.
Reimplemented from std::basic_streambuf< CharT, Traits >. Definition at line 492 of file fstream.tcc. References std::basic_filebuf< CharT, Traits >::seekoff(). |
|
Manipulates the buffer.
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 405 of file fstream.tcc. |
|
Setting the three read area pointers.
|
|
Setting the three write area pointers.
|
|
Getting the next character.
underflow() . Does not move the read position after fetching the character.
Definition at line 489 of file streambuf. Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::snextc(). |
|
Entry point for xsgetn.
|
|
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
Reimplemented from std::basic_streambuf< CharT, Traits >. Definition at line 159 of file fstream.tcc. References std::basic_streambuf< CharT, Traits >::getloc(). |
|
Getting the next character.
sbumpc() , and if that function returns traits::eof() , so does this function. Otherwise, sgetc() .
|
|
Pushing characters back into the input stream.
Definition at line 66 of file streambuf.tcc. References std::basic_streambuf< CharT, Traits >::pbackfail(). Referenced by std::operator>>(). |
|
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 Definition at line 104 of file streambuf.tcc. References std::basic_streambuf< CharT, Traits >::overflow(). Referenced by std::basic_stringbuf< CharT, Traits, Alloc >::overflow(). |
|
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. |
|
Moving backwards in the input stream.
Definition at line 83 of file streambuf.tcc. References std::basic_streambuf< CharT, Traits >::pbackfail(). |
|
Synchronizes the buffer arrays with the controlled sequences.
Reimplemented from std::basic_streambuf< CharT, Traits >. Definition at line 311 of file fstream. Referenced by std::basic_filebuf< CharT, Traits >::seekoff(), and std::basic_filebuf< CharT, enc_char_traits< CharT > >::sync(). |
|
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 from std::basic_streambuf< CharT, Traits >. |
|
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 >. Definition at line 453 of file fstream. Referenced by std::basic_filebuf< CharT, Traits >::pbackfail(). |
|
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. Reimplemented from std::basic_streambuf< CharT, Traits >. |
|
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. Reimplemented from std::basic_streambuf< CharT, Traits >. |