#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. | |
void | stossc () |
Tosses a character. | |
__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 __pos, 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.
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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. Reimplemented from std::basic_filebuf< _CharT, _Traits >. Definition at line 56 of file stdio_filebuf.h. |
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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. Reimplemented from std::basic_filebuf< _CharT, _Traits >. Definition at line 58 of file stdio_filebuf.h. |
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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. Reimplemented from std::basic_filebuf< _CharT, _Traits >. Definition at line 60 of file stdio_filebuf.h. |
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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. Reimplemented from std::basic_filebuf< _CharT, _Traits >. Definition at line 59 of file stdio_filebuf.h. |
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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. Reimplemented from std::basic_filebuf< _CharT, _Traits >. Definition at line 57 of file stdio_filebuf.h. |
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Definition at line 120 of file stdio_filebuf.h. References std::basic_filebuf< _CharT, _Traits >::is_open(). |
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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(). |
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Possibly closes the external data stream, in the case of the file descriptor constructor and Definition at line 115 of file stdio_filebuf.h. |
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Closes the currently associated file.
If a "put buffer area" exists, If any operations fail, this function also fails. Definition at line 121 of file fstream.tcc. Referenced by std::basic_filebuf< _CharT, _Traits >::open(). |
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Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 598 of file streambuf. Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(). |
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Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 604 of file streambuf. Referenced by std::basic_streambuf< char, char_traits< char > >::in_avail(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(). |
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Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 653 of file streambuf. Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(). |
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Definition at line 110 of file stdio_filebuf.h. |
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Moving the read position.
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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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Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 601 of file streambuf. Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), std::basic_streambuf< char, char_traits< char > >::in_avail(), std::basic_streambuf< _CharT, _Traits >::sbumpc(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(). |
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Changes translations.
Reimplemented from std::basic_streambuf< _CharT, _Traits >. Definition at line 511 of file fstream.tcc. References std::basic_streambuf< _CharT, _Traits >::eback(), std::basic_streambuf< _CharT, _Traits >::gptr(), std::basic_streambuf< _CharT, _Traits >::pbase(), and std::basic_streambuf< _CharT, _Traits >::pptr(). |
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Looking ahead into the stream.
showmanyc() .
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Returns true if the external file is open.
Definition at line 167 of file fstream. Referenced by std::basic_filebuf< _CharT, _Traits >::open(), std::basic_filebuf< _CharT, _Traits >::seekoff(), std::basic_filebuf< _CharT, _Traits >::setbuf(), std::basic_filebuf< _CharT, _Traits >::showmanyc(), and __gnu_cxx::stdio_filebuf< _CharT, _Traits >::stdio_filebuf(). |
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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(), std::basic_filebuf< _CharT, _Traits >::is_open(), std::basic_filebuf< _CharT, _Traits >::seekoff(), and std::basic_filebuf< _CharT, _Traits >::underflow(). |
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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).
Reimplemented from std::basic_streambuf< _CharT, _Traits >. Definition at line 255 of file fstream.tcc. References std::basic_filebuf< _CharT, _Traits >::int_type. |
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Tries to back up the input sequence.
Reimplemented from std::basic_streambuf< _CharT, _Traits >. Definition at line 182 of file fstream.tcc. References std::basic_filebuf< _CharT, _Traits >::char_type, std::basic_filebuf< _CharT, _Traits >::int_type, std::basic_filebuf< _CharT, _Traits >::seekoff(), and std::basic_filebuf< _CharT, _Traits >::underflow(). |
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Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 647 of file streambuf. Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(). |
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Moving the write position.
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Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 650 of file streambuf. Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), and std::basic_stringbuf< _CharT, _Traits, _Alloc >::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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Entry points for derived buffer functions.
The public versions of |
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Entry points for derived buffer functions.
The public versions of |
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Entry points for derived buffer functions.
The public versions of |
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Getting the next character.
uflow() .
Definition at line 49 of file streambuf.tcc. References std::basic_streambuf< _CharT, _Traits >::char_type, std::basic_streambuf< _CharT, _Traits >::gptr(), std::basic_streambuf< _CharT, _Traits >::int_type, and std::basic_streambuf< _CharT, _Traits >::uflow(). Referenced by std::operator>>(). |
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Alters the stream positions. Each derived class provides its own appropriate behavior.
Reimplemented from std::basic_streambuf< _CharT, _Traits >. Definition at line 432 of file fstream.tcc. References std::basic_filebuf< _CharT, _Traits >::is_open(), std::max(), std::basic_filebuf< _CharT, _Traits >::off_type, std::basic_filebuf< _CharT, _Traits >::pos_type, and std::basic_filebuf< _CharT, _Traits >::sync(). Referenced by std::basic_filebuf< _CharT, _Traits >::open(), std::basic_filebuf< _CharT, _Traits >::pbackfail(), and std::basic_filebuf< _CharT, _Traits >::seekpos(). |
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Alters the stream positions. Each derived class provides its own appropriate behavior.
Reimplemented from std::basic_streambuf< _CharT, _Traits >. Definition at line 494 of file fstream.tcc. References std::basic_filebuf< _CharT, _Traits >::off_type, and std::basic_filebuf< _CharT, _Traits >::seekoff(). |
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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 407 of file fstream.tcc. References std::basic_filebuf< _CharT, _Traits >::is_open(). |
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Setting the three read area pointers.
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Setting the three write area pointers.
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Getting the next character.
underflow() . Does not move the read position after fetching the character.
Definition at line 488 of file streambuf. Referenced by std::basic_streambuf< char, char_traits< char > >::snextc(). |
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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
Reimplemented from std::basic_streambuf< _CharT, _Traits >. Definition at line 168 of file fstream.tcc. References std::basic_filebuf< _CharT, _Traits >::is_open(). |
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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.
Definition at line 66 of file streambuf.tcc. References std::basic_streambuf< _CharT, _Traits >::int_type, and std::basic_streambuf< _CharT, _Traits >::pbackfail(). Referenced by std::operator>>(). |
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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 Definition at line 104 of file streambuf.tcc. References std::basic_streambuf< _CharT, _Traits >::int_type, and std::basic_streambuf< _CharT, _Traits >::overflow(). Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(). |
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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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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
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Moving backwards in the input stream.
Definition at line 83 of file streambuf.tcc. References std::basic_streambuf< _CharT, _Traits >::int_type, and std::basic_streambuf< _CharT, _Traits >::pbackfail(). |
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Synchronizes the buffer arrays with the controlled sequences.
Reimplemented from std::basic_streambuf< _CharT, _Traits >. Definition at line 322 of file fstream. Referenced by std::basic_filebuf< _CharT, _Traits >::seekoff(). |
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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.
Reimplemented from std::basic_streambuf< _CharT, _Traits >. |
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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< _CharT, _Traits >. Definition at line 453 of file fstream. Referenced by std::basic_filebuf< _CharT, _Traits >::open(), and std::basic_filebuf< _CharT, _Traits >::pbackfail(). |
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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. Reimplemented from std::basic_streambuf< _CharT, _Traits >. |
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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. Reimplemented from std::basic_streambuf< _CharT, _Traits >. |