libstdc++
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Public Types | |
typedef _Codecvt::state_type | state_type |
typedef _Elem | char_type |
typedef _Tr | 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 |
Public Member Functions | |
wbuffer_convert (streambuf *__bytebuf=0, _Codecvt *__pcvt=new _Codecvt, state_type __state=state_type()) | |
wbuffer_convert (const wbuffer_convert &)=delete | |
locale | getloc () const |
streamsize | in_avail () |
wbuffer_convert & | operator= (const wbuffer_convert &)=delete |
locale | pubimbue (const locale &__loc) |
streambuf * | rdbuf () const noexcept |
streambuf * | rdbuf (streambuf *__bytebuf) noexcept |
int_type | sbumpc () |
int_type | sgetc () |
streamsize | sgetn (char_type *__s, streamsize __n) |
int_type | snextc () |
int_type | sputbackc (char_type __c) |
int_type | sputc (char_type __c) |
streamsize | sputn (const char_type *__s, streamsize __n) |
state_type | state () const noexcept |
int_type | sungetc () |
basic_streambuf * | pubsetbuf (char_type *__s, streamsize __n) |
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 () |
Protected Attributes | |
locale | _M_buf_locale |
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 |
virtual | int_type |
Buffer conversions.
Definition at line 321 of file locale_conv.h.
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inherited |
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inherited |
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inherited |
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inherited |
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inherited |
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inherited |
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inlineexplicit |
Default constructor.
__bytebuf | The underlying byte stream buffer. |
__pcvt | The facet to use for conversions. |
__state | Initial conversion state. |
Takes ownership of __pcvt
and will delete it in the destructor.
Definition at line 337 of file locale_conv.h.
References std::basic_streambuf< _Elem, _Tr >::setg(), and std::basic_streambuf< _Elem, _Tr >::setp().
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inlineprotectedinherited |
Access to the get area.
These functions are only available to other protected functions, including derived classes.
Definition at line 489 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_in_beg.
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inlineprotectedinherited |
Access to the get area.
These functions are only available to other protected functions, including derived classes.
Definition at line 495 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_in_end.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::underflow().
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inlineprotectedinherited |
Access to the put area.
These functions are only available to other protected functions, including derived classes.
Definition at line 542 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_out_end.
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inlineprotectedinherited |
Moving the read position.
__n | The delta by which to move. |
This just advances the read position without returning any data.
Definition at line 505 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_in_cur.
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inlineinherited |
Locale access.
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.
References std::basic_streambuf< _CharT, _Traits >::_M_buf_locale.
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inlineprotectedinherited |
Access to the get area.
These functions are only available to other protected functions, including derived classes.
Definition at line 492 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_in_cur.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::underflow().
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inlineprotectedvirtualinherited |
Changes translations.
__loc | A new locale. |
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.
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inlineinherited |
Looking ahead into the stream.
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.
References std::basic_streambuf< _CharT, _Traits >::egptr(), std::basic_streambuf< _CharT, _Traits >::gptr(), and std::basic_streambuf< _CharT, _Traits >::showmanyc().
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inlineprotectedinherited |
Access to the put area.
These functions are only available to other protected functions, including derived classes.
Definition at line 536 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_out_beg.
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inlineprotectedinherited |
Moving the write position.
__n | The delta by which to move. |
This just advances the write position without returning any data.
Definition at line 552 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_out_cur.
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inlineprotectedinherited |
Access to the put area.
These functions are only available to other protected functions, including derived classes.
Definition at line 539 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_out_cur.
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inlineinherited |
Entry point for imbue().
__loc | The new locale. |
Calls the derived imbue(__loc).
Definition at line 216 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_buf_locale, std::basic_streambuf< _CharT, _Traits >::getloc(), and std::basic_streambuf< _CharT, _Traits >::imbue().
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inlineinherited |
Alters the stream position.
__off | Offset. |
__way | Value for ios_base::seekdir. |
__mode | Value for ios_base::openmode. |
Calls virtual seekoff function.
Definition at line 258 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::seekoff().
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inlineinherited |
Alters the stream position.
__sp | Position |
__mode | Value for ios_base::openmode. |
Calls virtual seekpos function.
Definition at line 270 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::seekpos().
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inlineinherited |
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.
References std::basic_streambuf< _CharT, _Traits >::setbuf().
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inlineinherited |
Calls virtual sync function.
Definition at line 278 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::sync().
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inlineinherited |
Getting the next character.
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.
References std::basic_streambuf< _CharT, _Traits >::egptr(), std::basic_streambuf< _CharT, _Traits >::gbump(), std::basic_streambuf< _CharT, _Traits >::gptr(), and std::basic_streambuf< _CharT, _Traits >::uflow().
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inlineprotectedvirtualinherited |
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inlineprotectedvirtualinherited |
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inlineprotectedvirtualinherited |
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.
this
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inlineprotectedinherited |
Setting the three read area pointers.
__gbeg | A pointer. |
__gnext | A pointer. |
__gend | A pointer. |
eback()
, __gnext == gptr()
, and __gend == egptr()
Definition at line 516 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_in_beg, std::basic_streambuf< _CharT, _Traits >::_M_in_cur, and std::basic_streambuf< _CharT, _Traits >::_M_in_end.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::wbuffer_convert().
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inlineprotectedinherited |
Setting the three write area pointers.
__pbeg | A pointer. |
__pend | A pointer. |
pbase()
, __pbeg == pptr()
, and __pend == epptr()
Definition at line 562 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::_M_out_beg, std::basic_streambuf< _CharT, _Traits >::_M_out_cur, and std::basic_streambuf< _CharT, _Traits >::_M_out_end.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::wbuffer_convert().
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inlineinherited |
Getting the next character.
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.
References std::basic_streambuf< _CharT, _Traits >::egptr(), std::basic_streambuf< _CharT, _Traits >::gptr(), and std::basic_streambuf< _CharT, _Traits >::underflow().
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inlineinherited |
Entry point for xsgetn.
__s | A buffer area. |
__n | A count. |
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.
References std::basic_streambuf< _CharT, _Traits >::xsgetn().
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inlineprotectedvirtualinherited |
Investigating the data available.
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
eof()
but that they will return immediately. showmanyc
are es-how-many-see, not show-manic.
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inlineinherited |
Getting the next character.
Calls sbumpc()
, and if that function returns traits::eof()
, so does this function. Otherwise, sgetc()
.
Definition at line 305 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::sbumpc(), and std::basic_streambuf< _CharT, _Traits >::sgetc().
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inlineinherited |
Pushing characters back into the input stream.
__c | The character to push back. |
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.
References std::basic_streambuf< _CharT, _Traits >::eback(), std::basic_streambuf< _CharT, _Traits >::gbump(), and std::basic_streambuf< _CharT, _Traits >::gptr().
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inlineinherited |
Entry point for all single-character output functions.
__c | A character to output. |
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.
References std::basic_streambuf< _CharT, _Traits >::epptr(), std::basic_streambuf< _CharT, _Traits >::pbump(), and std::basic_streambuf< _CharT, _Traits >::pptr().
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inlineinherited |
Entry point for all single-character output functions.
__s | A buffer read area. |
__n | A count. |
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.
References std::basic_streambuf< _CharT, _Traits >::xsputn().
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inlinenoexcept |
The conversion state following the last conversion.
Definition at line 373 of file locale_conv.h.
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inlineinherited |
Moving backwards in the input stream.
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.
References std::basic_streambuf< _CharT, _Traits >::eback(), std::basic_streambuf< _CharT, _Traits >::gbump(), and std::basic_streambuf< _CharT, _Traits >::gptr().
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inlineprotectedvirtual |
Synchronizes the buffer arrays with the controlled sequences.
Each derived class provides its own appropriate behavior, including the definition of failure.
Reimplemented from std::basic_streambuf< _Elem, _Tr >.
Definition at line 377 of file locale_conv.h.
References std::basic_streambuf< _CharT, _Traits >::pubsync().
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protectedvirtualinherited |
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()
.
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inlineprotectedvirtualinherited |
Fetches more data from the controlled sequence.
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.
Definition at line 707 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::gbump(), std::basic_streambuf< _CharT, _Traits >::gptr(), and std::basic_streambuf< _CharT, _Traits >::underflow().
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inlineprotectedvirtual |
Fetches more data from the controlled sequence.
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
Reimplemented from std::basic_streambuf< _Elem, _Tr >.
Definition at line 391 of file locale_conv.h.
References std::basic_streambuf< _Elem, _Tr >::egptr(), and std::basic_streambuf< _Elem, _Tr >::gptr().
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protectedvirtualinherited |
Multiple character extraction.
__s | A buffer area. |
__n | Maximum number of characters to assign. |
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.
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protectedvirtualinherited |
Multiple character insertion.
__s | A buffer area. |
__n | Maximum number of characters to write. |
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.
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protectedinherited |
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protectedinherited |
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protectedinherited |
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protectedinherited |
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protectedinherited |
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protectedinherited |
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protectedinherited |
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protectedinherited |
Consumes data from the buffer; writes to the controlled sequence.
__c | An additional character to consume. |
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).