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std::basic_streambuf – cppreference.com

<metanoindex/>

<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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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

[virtuell]

zerstört sich die basic_streambuf Objekt

Original:

destructs the basic_streambuf object

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(virtuellen öffentlichen Member-Funktion) [edit]

Locales

Original:

Locales

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Beruft imbue()

Original:

invokes imbue()

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(öffentliche Elementfunktion) [edit]

erhält eine Kopie des zugehörigen locale

Original:

obtains a copy of the associated locale

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(öffentliche Elementfunktion) [edit]

Positionierung

Original:

Positioning

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Beruft setbuf()

Original:

invokes setbuf()

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(öffentliche Elementfunktion) [edit]

Beruft seekoff()

Original:

invokes seekoff()

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(öffentliche Elementfunktion) [edit]

Beruft seekpos()

Original:

invokes seekpos()

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(öffentliche Elementfunktion) [edit]

Beruft sync()

Original:

invokes sync()

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(öffentliche Elementfunktion) [edit]

Get area

Original:

Get area

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erhält die Anzahl der Zeichen sofort in der get-Bereich

Original:

obtains the number of characters immediately available in the get area

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(öffentliche Elementfunktion) [edit]

Fortschritte die Eingabesequenz, dann liest ein Charakter ohne Förderung wieder

Original:

advances the input sequence, then reads one character without advancing again

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(öffentliche Elementfunktion) [edit]

liest ein Zeichen aus der Eingabesequenz und fördert die Sequenz

Original:

reads one character from the input sequence and advances the sequence

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(öffentliche Elementfunktion) [edit]

stossc

(veraltet)

Fortschritte der Eingabesequenz, als ob durch den Aufruf

sbumpc()

und Verwerfen die Folge

Original:

advances the input sequence as if by calling

sbumpc()

and discarding the result

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(öffentliche Elementfunktion) [edit]

liest ein Zeichen aus der Eingabesequenz ohne dabei den Sequenz

Original:

reads one character from the input sequence without advancing the sequence

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(öffentliche Elementfunktion) [edit]

Beruft xsgetn()

Original:

invokes xsgetn()

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(öffentliche Elementfunktion) [edit]

Legen Bereich

Original:

Put area

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schreibt ein Zeichen der Put-Bereich und Fortschritte der nächste Zeiger

Original:

writes one character to the put area and advances the next pointer

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(öffentliche Elementfunktion) [edit]

Beruft xsputn()

Original:

invokes xsputn()

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(öffentliche Elementfunktion) [edit]

Putback

Original:

Putback

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stellt ein Zeichen wieder in der Eingabesequenz

Original:

puts one character back in the input sequence

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(öffentliche Elementfunktion) [edit]

bewegt den nächsten Zeiger in der Eingabesequenz zurück um eins

Original:

moves the next pointer in the input sequence back by one

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(öffentliche Elementfunktion) [edit]

Geschützt Member-Funktionen

Original:

Protected member functions

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konstruiert eine basic_streambuf Objekt

Original:

constructs a basic_streambuf object

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(geschützt Member-Funktion) [edit]

(C++11)

ersetzt eine basic_streambuf Objekt

Original:

replaces a basic_streambuf object

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(geschützt Member-Funktion) [edit]

(C++11)

Swaps zwei basic_streambuf Objekte

Original:

swaps two basic_streambuf objects

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Locales

Original:

Locales

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[virtuell]

ändert den zugehörigen Gebietsschema

Original:

changes the associated locale

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Positionierung

Original:

Positioning

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[virtuell]

ersetzt den Puffer mit benutzerdefinierten Array, sofern zulässig

Original:

replaces the buffer with user-defined array, if permitted

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[virtuell]

repositioniert der nächste Zeiger in der Eingangssequenz, Ausgangssequenz, oder beide, mit relativen Adressierung

Original:

repositions the next pointer in the input sequence, output sequence, or both, using relative addressing

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(virtuellen geschützten Member-Funktion) [edit]

[virtuell]

repositioniert der nächste Zeiger in der Eingangssequenz, Ausgangssequenz oder sowohl mit absoluten Adressierung

Original:

repositions the next pointer in the input sequence, output sequence, or both using absolute addressing

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(virtuellen geschützten Member-Funktion) [edit]

[virtuell]

synchronisiert die Puffer mit der zugehörigen Zeichenfolge

Original:

synchronizes the buffers with the associated character sequence

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(virtuellen geschützten Member-Funktion) [edit]

Get area

Original:

Get area

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[virtuell]

ermittelt die Anzahl der Zeichen für die Eingabe in dem zugehörigen Eingabesequenz, falls bekannt

Original:

obtains the number of characters available for input in the associated input sequence, if known

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(virtuellen geschützten Member-Funktion) [edit]

[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]

liest Zeichen aus dem dazugehörigen Eingang Sequenz an die get-Bereich und Fortschritte der nächste Zeiger

Original:

reads characters from the associated input sequence to the get area and advances the next pointer

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(virtuellen geschützten Member-Funktion) [edit]

[virtuell]

liest mehreren Zeichen der Eingabesequenz

Original:

reads multiple characters from the input sequence

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(virtuellen geschützten Member-Funktion) [edit]

liefert einen Zeiger auf den Anfang, aktuellen Charakter und Ende des get-Bereich

Original:

returns a pointer to the beginning, current character and the end of the get area

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(geschützt Member-Funktion) [edit]

Fortschritte der nächste Zeiger in der Eingabesequenz

Original:

advances the next pointer in the input sequence

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(geschützt Member-Funktion) [edit]

repositioniert der Anfang, nächsten und Endzeiger der Eingabesequenz

Original:

repositions the beginning, next, and end pointers of the input sequence

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(geschützt Member-Funktion) [edit]

Legen Bereich

Original:

Put area

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[virtuell]

writes multiple characters to the output sequence
(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]

liefert einen Zeiger auf den Anfang, aktuelle Zeichen und das Ende der Put-Bereich

Original:

returns a pointer to the beginning, current character and the end of the put area

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(geschützt Member-Funktion) [edit]

Fortschritte der nächste Zeiger der Ausgangssequenz

Original:

advances the next pointer of the output sequence

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(geschützt Member-Funktion) [edit]

repositioniert der Anfang, nächsten und Endzeiger der Ausgangssequenz

Original:

repositions the beginning, next, and end pointers of the output sequence

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(geschützt Member-Funktion) [edit]

Putback

Original:

Putback

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[virtuell]

stellt ein Zeichen wieder in der Eingangssequenz, gegebenenfalls Modifizierung der Eingabesequenz

Original:

puts a character back into the input sequence, possibly modifying the input sequence

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(virtuellen geschützten Member-Funktion) [edit]