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 () | |
wbuffer_convert (streambuf *__bytebuf, _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 387 of file locale_conv.h.
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inherited |
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inherited |
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inherited |
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).
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inherited |
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inherited |
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inherited |
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inline |
Default constructor.
Definition at line 395 of file locale_conv.h.
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inlineexplicit |
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 406 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 487 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 493 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 540 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 503 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 231 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 490 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 289 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 534 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 550 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 537 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 214 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 256 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 268 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 244 of file streambuf.
References std::basic_streambuf< _CharT, _Traits >::setbuf().
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inlineinherited |
Calls virtual sync function.
Definition at line 276 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 321 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 514 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 560 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 343 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 362 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 303 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 377 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 429 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 455 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 442 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 402 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 446 of file locale_conv.h.
References std::basic_streambuf< _CharT, _Traits >::pubsync().
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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 705 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 460 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 |
Tries to back up the input sequence.
Consumes data from the buffer; writes to the controlled sequence.
__c | The character to be inserted back into the sequence. |
gptr()
, eback()
, and pptr()
are the same as for underflow()
.__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).