std::basic_streambuf – cppreference.com

std::basic_streambuf

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< cpp | io

<metanoindex/>

 
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
Original:
Streams
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Abstraktionen
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Datei-I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(veraltet)
ostrstream(veraltet)
strstream(veraltet)
Types
Original:
Types
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streamoff
streamsize
fpos
Fehler Kategorie Schnittstelle
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_streambuf
Öffentliche Member-Funktionen
Original:
Public member functions
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basic_streambuf::~basic_streambuf
Locales
Original:
Locales
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basic_streambuf::pubimbue
basic_streambuf::getloc
Positionierung
Original:
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
Original:
Putback
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basic_streambuf::sputbackc
basic_streambuf::sungetc
Geschützt Member-Funktionen
Original:
Protected member functions
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basic_streambuf::basic_streambuf
basic_streambuf::operator=(C++11)
basic_streambuf::swap(C++11)
Locales
Original:
Locales
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basic_streambuf::imbue
Positionierung
Original:
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
Original:
Putback
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basic_streambuf::pbackfail
 
<tbody> </tbody>
definiert in Header <streambuf>
template< class CharT, class Traits = std::char_traits<CharT>, class Allocator = std::allocator<CharT> > class basic_streambuf;
Die Klasse basic_streambuf steuert Eingang und Ausgang mit einem Zeichensequenz. Es enthält und den Zugriff auf die kontrollierte Zeichensequenz (die Puffer) und gegebenenfalls die zugehörige Zeichen-Sequenz (Datei, I / O-Strom, TCP-Socket, usw.) .
Original:
The class basic_streambuf controls input and output to a character sequence. It includes and provides access to the controlled character sequence (the buffer) and, optionally, the associated character sequence (file, I/O stream, TCP socket, etc).
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Es unterstützt die folgenden Einschränkungen:
Original:
It supports the following constraints:
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  • die kontrollierte Eingabesequenz kann nicht gelesen werden .
    Original:
    the controlled input sequence may not be readable.
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  • die kontrollierte Ausgabe Sequenz kann nicht beschreibbar sein .
    Original:
    the controlled output sequence may not be writeable.
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  • der Zeichendarstellung und Codieren in der gesteuerten Sequenz kann sich von den Zeichendarstellungen in der zugeordneten Sequenz (a std::codecvt Gebietsschema Facette kann notwendig sein, um die Konvertierung durchzuführen)
    Original:
    the character representation and encoding in the controlled sequence may be different from the character representations in the associated sequence (a std::codecvt locale facet may be necessary to perform the conversion)
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  • der gesteuerte Sequenz kann in der Lage sein, um die zugeordnete Sequenz direkt zuzugreifen .
    Original:
    the controlled sequence may be able to access the associated sequence directly.
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  • die kontrollierte Sequenz kann willkürliche Einschränkungen beim Lesen zu verhängen, Schreiben, Suchen oder ungetting Zeichen .
    Original:
    the controlled sequence may impose arbitrary limitations on reading, writing, seeking, or ungetting characters.
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Die gesteuerte Zeichensequenz (die Puffer) ist ein Array von CharT welche zu allen Zeiten, eine Subsequenz oder ein "Fenster" in die zugeordnete Zeichenfolge. Sein Zustand wird durch drei Zeiger beschrieben:
Original:
The controlled character sequence (the buffer) is an array of CharT which, at all times, represents a subsequence, or a "window" into the associated character sequence. Its state is described by three pointers:
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1)

Das Anfang Zeiger, zeigt immer auf der untersten Element des Puffers
Original:
The beginning pointer, always points at the lowest element of the buffer
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2)

Das nächste Zeiger, zeigt auf das Element, das der nächste Kandidat für das Lesen oder Schreiben ist
Original:
The next pointer, points at the element that is the next candidate for reading or writing
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3)

Das Endezeiger, weist ein über das Ende des Puffers .
Original:
The end pointer, points one past the end of the buffer.
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Wenn der nächste Zeiger kleiner ist als der Endzeiger in einer Ausgangssequenz, a Schreibposition verfügbar ist. Der nächste Zeiger dereferenziert und zugeordnet werden .
Original:
If the next pointer is less than the end pointer in an output sequence, a write position is available. The next pointer can be dereferenced and assigned to.
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Wenn der nächste Zeiger kleiner ist als der Endzeiger in einer Eingabesequenz, lesen a' Position verfügbar ist. Der nächste Zeiger dereferenziert und gelesen werden .
Original:
If the next pointer is less than the end pointer in an input sequence, a read position is available. The next pointer can be dereferenced and read from.
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Wenn der nächste Zeiger größer ist als der beginnenden Zeiger in einer Eingangsfolge, a' putback Position verfügbar ist, und der nächste Zeiger kann dekrementiert, aufgelöst werden, und übertragen auf, um ein Zeichen wieder in der Eingabesequenz .
Original:
If the next pointer is greater than the beginning pointer in an input sequence, a putback position is available, and the next pointer may be decremented, dereferenced, and assigned to, in order to put a character back into the input sequence.
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Ein Objekt kann basic_streambuf unterstützt einer Eingangssequenz (in welchem ​​Fall der Puffer durch den Beginn, nächsten und Endzeiger beschrieben heißt erhalten Bereich), eine Ausgangssequenz ( gelegt Bereich) oder eine Eingabe / Ausgangssequenz. In letzterem Fall werden sechs Zeigern verfolgt, die möglicherweise alle Elemente des gleichen Zeichen-Array oder zwei einzelne Arrays zeigen .
Original:
A basic_streambuf object may support an input sequence (in which case the buffer described by the beginning, next, and end pointers is called get area), an output sequence (put area), or an input/output sequence. In latter case, six pointers are tracked, which may all point to elements of the same character array or two individual arrays.
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Typische Umsetzung der std::basic_streambuf Basisklasse hält nur diese sechs CharT* Zeiger und eine Kopie des std::locale als Datenelemente. Die Puffer selbst von den abgeleiteten Klassen wie umgesetzt werden std::basic_filebuf oder std::basic_stringbuf .
Original:
Typical implementation of the std::basic_streambuf base class holds only these six CharT* pointers and a copy of std::locale as data members. The buffers themselves are implemented by the derived classes such as std::basic_filebuf or std::basic_stringbuf.
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This section is incomplete
Reason: Consistent terminology across the pages. Probably input/output sequence, get/put area, etc.
Zwei Convenience typedefs werden von der Standard-Bibliothek zur Verfügung gestellt
Original:
Two convenience typedefs are provided by the standard library
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definiert in Header <streambuf>
Type
Original:
Type
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 Definition
streambuf basic_streambuf<char>
wstreambuf basic_streambuf<wchar_t>
Die I / O Stream-Objekten std::basic_istream, std::basic_ostream und abgeleitet sind, ganz im Sinne des std::basic_streambuf umgesetzt .
Original:
The I/O stream objects std::basic_istream, std::basic_ostream, and derived, are implemented entirely in terms of std::basic_streambuf.
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Mitglied Typen

Mitglied Typ
Original:
Member type
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 Definition
char_type CharT[edit]
traits_type Traits[edit]
int_type Traits::int_type[edit]
pos_type Traits::pos_type[edit]
off_type Traits::off_type[edit]

Member-Funktionen