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std::basic_streambuf::uflow

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< cpp‎ | io‎ | basic streambuf

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C++
 
Input / Output-Bibliothek
I / O-Manipulatoren
C-style I / O
Puffern
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(veraltet)
Streams
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Streams
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Abstraktionen
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Datei-I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
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Array I/O
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istrstream(veraltet)
ostrstream(veraltet)
strstream(veraltet)
Types
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Types
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streamoff
streamsize
fpos
Fehler Kategorie Schnittstelle
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_streambuf
Öffentliche Member-Funktionen
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Public member functions
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basic_streambuf::~basic_streambuf
Locales
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Locales
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basic_streambuf::pubimbue
basic_streambuf::getloc
Positionierung
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Positioning
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basic_streambuf::pubsetbuf
basic_streambuf::pubseekoff
basic_streambuf::pubseekpos
basic_streambuf::pubsync
Get area
Original:
Get area
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basic_streambuf::in_avail
basic_streambuf::snextc
basic_streambuf::sbumpc
basic_streambuf::sgetc
basic_streambuf::sgetn
Legen Bereich
Original:
Put area
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basic_streambuf::sputc
basic_streambuf::sputn
Putback
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Putback
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basic_streambuf::sputbackc
basic_streambuf::sungetc
Geschützt Member-Funktionen
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Protected member functions
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basic_streambuf::basic_streambuf
basic_streambuf::operator=(C++11)
basic_streambuf::swap(C++11)
Locales
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Locales
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basic_streambuf::imbue
Positionierung
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Positioning
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basic_streambuf::setbuf
basic_streambuf::seekoff
basic_streambuf::seekpos
basic_streambuf::sync
Get area
Original:
Get area
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basic_streambuf::showmanyc
basic_streambuf::underflow
basic_streambuf::uflow
basic_streambuf::xsgetn
basic_streambuf::eback
basic_streambuf::gptr
basic_streambuf::egptr
basic_streambuf::gbump
basic_streambuf::setg
Legen Bereich
Original:
Put area
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basic_streambuf::xsputn
basic_streambuf::overflow
basic_streambuf::pbase
basic_streambuf::pptr
basic_streambuf::epptr
basic_streambuf::pbump
basic_streambuf::setp
Putback
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Putback
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basic_streambuf::pbackfail
 
int_type uflow();
Stellt sicher, dass mindestens ein Zeichen verfügbar ist im Eingangsbereich durch die Aktualisierung der Zeiger auf den Eingangsbereich (falls erforderlich). Bei Erfolg gibt den Wert des Zeichens und setzt den Wert der get-Zeiger von einem Zeichen. Bei Ausfall kehrt traits::eof() .
Original:
Ensures that at least one character is available in the input area by updating the pointers to the input area (if needed). On success returns the value of that character and advances the value of the get pointer by one character. On failure returns traits::eof().
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Die Funktion kann zu aktualisieren gptr, egptr und eback Zeigern auf den Standort der neu geladenen Daten (sofern vorhanden) zu definieren. Bei Ausfall sorgt die Funktion, dass entweder gptr() == nullptr oder gptr() == egptr .
Original:
The function may update gptr, egptr and eback pointers to define the location of newly loaded data (if any). On failure, the function ensures that either gptr() == nullptr or gptr() == egptr.
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Die Basisklasse Version der Funktion nennt underflow. Die abgeleiteten Klassen können diese Funktion überschreiben, um Aktualisierungen der get-Bereich im Falle der Erschöpfung ermöglichen .
Original:
The base class version of the function calls underflow. The derived classes may override this function to allow updates to the get area in the case of exhaustion.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

(None)
Original:
(none)
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[Bearbeiten] Rückgabewert

Der Wert des Charakters, die von der get-Zeiger wurde darauf, bevor es durch ein vorverlegt wurde oder traits::eof() sonst .
Original:
The value of the character that was pointed to by the get pointer before it was advanced by one, or traits::eof() otherwise.
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Die Basisklasse Version der Funktion gibt den Wert von underflow zurückgegeben .
Original:
The base class version of the function returns the value returned by underflow.
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[Bearbeiten] Hinweis

Die öffentlichen Funktionen std::streambuf rufen Sie diese Funktion nur, wenn gptr() == nullptr oder gptr() >= egptr() .
Original:
The public functions of std::streambuf call this function only if gptr() == nullptr or gptr() >= egptr().
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[Bearbeiten] Beispiel

This section is incomplete
Reason: no example

[Bearbeiten] Siehe auch

[virtuell]
liest Zeichen aus dem dazugehörigen Eingang Sequenz an die get-Bereich
Original:
reads characters from the associated input sequence to the get area
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(virtuellen geschützten Member-Funktion) [edit]
[virtuell]
schreibt Zeichen auf die zugehörige Ausgangsscheibe Sequenz aus dem Bereich gebracht
Original:
writes characters to the associated output sequence from the put area
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(virtuellen geschützten Member-Funktion) [edit]
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