std::wbuffer_convert< _Codecvt, _Elem, _Tr >(3cxx) | std::wbuffer_convert< _Codecvt, _Elem, _Tr >(3cxx) |
std::wbuffer_convert< _Codecvt, _Elem, _Tr > - Buffer conversions.
#include <locale_conv.h>
Inherits std::basic_streambuf< _CharT, _Traits >.
typedef _Codecvt::state_type state_type
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
typedef basic_streambuf< char_type, traits_type
> __streambuf_type
This is a non-standard type.
wbuffer_convert ()
Default constructor. wbuffer_convert (const
wbuffer_convert &)=delete
wbuffer_convert (streambuf *__bytebuf, _Codecvt
*__pcvt=new _Codecvt, state_type __state=state_type())
locale getloc () const
Locale access. streamsize in_avail ()
Looking ahead into the stream. wbuffer_convert & operator=
(const wbuffer_convert &)=delete
locale pubimbue (const locale &__loc)
Entry point for imbue(). streambuf * rdbuf () const
noexcept
streambuf * rdbuf (streambuf *__bytebuf)
noexcept
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 snextc ()
Getting the next character. int_type sputbackc (char_type
__c)
Pushing characters back into 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. state_type state
() const noexcept
The conversion state following the last conversion. int_type
sungetc ()
Moving backwards in the input stream.
basic_streambuf * 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)
Alters the stream position. pos_type pubseekpos (pos_type
__sp, ios_base::openmode
__mode=ios_base::in|ios_base::out)
Alters the stream position. int pubsync ()
Calls virtual sync function.
void __safe_gbump (streamsize __n)
void __safe_pbump (streamsize __n)
void gbump (int __n)
Moving the read position. virtual void imbue
(const locale &__loc
__attribute__((__unused__)))
Changes translations. virtual int_type overflow
(int_type __c __attribute__((__unused__))=traits_type::eof())
Consumes data from the buffer; writes to the controlled sequence.
_Wide_streambuf::int_type overflow (typename
_Wide_streambuf::int_type __out)
virtual int_type pbackfail (int_type __c
__attribute__((__unused__))=traits_type::eof())
Tries to back up the input sequence. void pbump (int __n)
Moving the write position. 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 basic_streambuf<
char_type, _Traits > * setbuf (char_type *,
streamsize)
Manipulates the buffer. void setg (char_type
*__gbeg, char_type *__gnext, char_type
*__gend)
Setting the three read area pointers. void setp
(char_type *__pbeg, char_type *__pend)
Setting the three write area pointers. virtual streamsize
showmanyc ()
Investigating the data available. void swap
(basic_streambuf &__sb)
int sync ()
Synchronizes the buffer arrays with the controlled sequences. virtual
int_type uflow ()
Fetches more data from the controlled sequence.
_Wide_streambuf::int_type underflow ()
Fetches more data from the controlled sequence. virtual
streamsize xsgetn (char_type *__s,
streamsize __n)
Multiple character extraction. virtual streamsize xsputn
(const char_type *__s, streamsize __n)
Multiple character insertion. streamsize xsputn (const
typename _Wide_streambuf::char_type *__s,
streamsize __n)
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.
locale _M_buf_locale
Current locale setting. char_type * _M_in_beg
Start of get area. char_type * _M_in_cur
Current read area. char_type * _M_in_end
End of get area. char_type * _M_out_beg
Start of put area. char_type * _M_out_cur
Current put area. char_type * _M_out_end
End of put area.
class std::wbuffer_convert< _Codecvt, _Elem, _Tr >"Buffer conversions.
Definition at line 387 of file locale_conv.h.
This is a non-standard type.
Definition at line 140 of file streambuf.
These are standard types. They permit a standardized way of referring to names of (or names dependent on) the template parameters, which are specific to the implementation.
Definition at line 131 of file streambuf.
These are standard types. They permit a standardized way of referring to names of (or names dependent on) the template parameters, which are specific to the implementation.
Definition at line 133 of file streambuf.
These are standard types. They permit a standardized way of referring to names of (or names dependent on) the template parameters, which are specific to the implementation.
Definition at line 135 of file streambuf.
These are standard types. They permit a standardized way of referring to names of (or names dependent on) the template parameters, which are specific to the implementation.
Definition at line 134 of file streambuf.
Definition at line 392 of file locale_conv.h.
These are standard types. They permit a standardized way of referring to names of (or names dependent on) the template parameters, which are specific to the implementation.
Definition at line 132 of file streambuf.
Default constructor.
Definition at line 395 of file locale_conv.h.
Constructor.
Parameters
Takes ownership of __pcvt and will delete it in the destructor.
Definition at line 406 of file locale_conv.h.
References std::basic_streambuf< _CharT, _Traits >::setg(), and std::basic_streambuf< _CharT, _Traits >::setp().
Definition at line 802 of file streambuf.
Definition at line 805 of file streambuf.
Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 489 of file streambuf.
Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 495 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::underflow().
Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 542 of file streambuf.
Moving the read position.
Parameters
This just advances the read position without returning any data.
Definition at line 505 of file streambuf.
Locale access.
Returns
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 233 of file streambuf.
Access to the get area. These functions are only available to other protected functions, including derived classes.
Definition at line 492 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::underflow().
Changes translations.
Parameters
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
Definition at line 583 of file streambuf.
Looking ahead into the stream.
Returns
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 291 of file streambuf.
Consumes data from the buffer; writes to the controlled sequence.
Parameters
Returns
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 definition 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
Definition at line 775 of file streambuf.
Definition at line 450 of file locale_conv.h.
Tries to back up the input sequence.
Parameters
Returns
Postcondition
Note
Definition at line 731 of file streambuf.
Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 536 of file streambuf.
Moving the write position.
Parameters
This just advances the write position without returning any data.
Definition at line 552 of file streambuf.
Access to the put area. These functions are only available to other protected functions, including derived classes.
Definition at line 539 of file streambuf.
Entry point for imbue().
Parameters
Returns
Calls the derived imbue(__loc).
Definition at line 216 of file streambuf.
Alters the stream position.
Parameters
Calls virtual seekoff function.
Definition at line 258 of file streambuf.
Alters the stream position.
Parameters
Calls virtual seekpos function.
Definition at line 270 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 246 of file streambuf.
Calls virtual sync function.
Definition at line 278 of file streambuf.
Definition at line 431 of file locale_conv.h.
Definition at line 434 of file locale_conv.h.
Getting the next character.
Returns
If the input read position is available, returns that character and increments the read pointer, otherwise calls and returns uflow().
Definition at line 323 of file streambuf.
Alters the stream positions. Each derived class provides its own appropriate behavior.
Note
Reimplemented in std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, std::basic_filebuf< _CharT, _Traits >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.
Definition at line 609 of file streambuf.
Alters the stream positions. Each derived class provides its own appropriate behavior.
Note
Reimplemented in std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, std::basic_filebuf< _CharT, _Traits >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.
Definition at line 621 of file streambuf.
Manipulates the buffer. Each derived class provides its own appropriate behavior. See the next-to-last paragraph of https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering for more on this function.
Note
Reimplemented in std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, std::basic_filebuf< _CharT, _Traits >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.
Definition at line 598 of file streambuf.
Setting the three read area pointers.
Parameters
Postcondition
Definition at line 516 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::wbuffer_convert().
Setting the three write area pointers.
Parameters
Postcondition
Definition at line 562 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::wbuffer_convert().
Getting the next character.
Returns
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 345 of file streambuf.
Entry point for xsgetn.
Parameters
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 364 of file streambuf.
Investigating the data available.
Returns
If it returns a positive value, then successive calls to 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
Note
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, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, std::basic_filebuf< _CharT, _Traits >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.
Definition at line 656 of file streambuf.
Getting the next character.
Returns
Calls sbumpc(), and if that function returns traits::eof(), so does this function. Otherwise, sgetc().
Definition at line 305 of file streambuf.
Pushing characters back into the input stream.
Parameters
Returns
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 379 of file streambuf.
Entry point for all single-character output functions.
Parameters
Returns
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 431 of file streambuf.
Entry point for all single-character output functions.
Parameters
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 457 of file streambuf.
The conversion state following the last conversion.
Definition at line 442 of file locale_conv.h.
Moving backwards in the input stream.
Returns
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 404 of file streambuf.
Definition at line 819 of file streambuf.
Synchronizes the buffer arrays with the controlled sequences.
Returns
Each derived class provides its own appropriate behavior, including the definition of failure.
Note
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 446 of file locale_conv.h.
Fetches more data from the controlled sequence.
Returns
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 707 of file streambuf.
Fetches more data from the controlled sequence.
Returns
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 definition 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 https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html
Note
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 460 of file locale_conv.h.
References std::basic_streambuf< _CharT, _Traits >::egptr(), and std::basic_streambuf< _CharT, _Traits >::gptr().
Multiple character extraction.
Parameters
Returns
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 std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, and std::basic_filebuf< _CharT, _Traits >.
Definition at line 45 of file streambuf.tcc.
References std::min().
Multiple character insertion.
Parameters
Returns
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 std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, and std::basic_filebuf< _CharT, _Traits >.
Definition at line 79 of file streambuf.tcc.
References std::min().
Definition at line 472 of file locale_conv.h.
Current locale setting.
Definition at line 199 of file streambuf.
Referenced by std::basic_filebuf< _CharT, _Traits >::basic_filebuf().
Start of get area.
Definition at line 191 of file streambuf.
Current read area.
Definition at line 192 of file streambuf.
End of get area.
Definition at line 193 of file streambuf.
Start of put area.
Definition at line 194 of file streambuf.
Current put area.
Definition at line 195 of file streambuf.
End of put area.
Definition at line 196 of file streambuf.
Generated automatically by Doxygen for libstdc++ from the source code.
libstdc++ |