std::basic_stringbuf::setbuf
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| protected: virtual std::basic_streambuf<CharT, Traits>* setbuf( char_type* s, std::streamsize n ) |
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Wenn
s ein NULL-Zeiger ist und n Null ist, hat diese Funktion keine Wirkung .Original:
If
s is a null pointer and n is zero, this function has no effect.The text has been machine-translated via Google Translate.
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Ansonsten ist die Wirkung Implementierung definiert: einige Implementierungen nichts tun, während einige Implementierungen deaktivieren std::string Mitglied derzeit als Puffer verwendet und beginnen mit dem Benutzer gelieferten Zeichen Array der Größe
n, deren erstes Element ist, um durch s hingewiesen, da die Puffer und der Eingabe / Ausgabe-Zeichenfolge .Original:
Otherwise, the effect is implementation-defined: some implementations do nothing, while some implementations clear the std::string member currently used as the buffer and begin using the user-supplied character array of size
n, whose first element is pointed to by s, as the buffer and the input/output character sequence.The text has been machine-translated via Google Translate.
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Diese Funktion geschützt ist virtuell, kann es nur durch
pubsetbuf() oder von Elementfunktionen einer benutzerdefinierten Klasse von std::basic_stringbuf abgeleitet aufgerufen werden .Original:
This function is protected virtual, it may only be called through
pubsetbuf() or from member functions of a user-defined class derived from std::basic_stringbuf.The text has been machine-translated via Google Translate.
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Inhaltsverzeichnis |
[Bearbeiten] Parameter
| s | - | Zeiger auf das erste Byte in der vom Benutzer bereitgestellten Puffer oder null
Original: pointer to the first byte in the user-provided buffer or null The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| n | - | die Anzahl von Bytes in dem Benutzer bereitgestellten Puffer oder Null
Original: the number of bytes in the user-provided buffer or zero The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[Bearbeiten] Rückgabewert
*this, auf die Basisklasse
std::basic_streambuf geworfen .Original:
*this, cast to the base class
std::basic_streambuf.The text has been machine-translated via Google Translate.
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[Bearbeiten] Notes
Die veraltete Strompuffers std::strstreambuf oder boost.IOStreams Gerät
boost::basic_array kann zur Implementierung I / O Puffer über einen vom Benutzer bereitgestellten char-Array in tragbaren Weise werden .Original:
The deprecated stream buffer std::strstreambuf or the boost.IOStreams device
boost::basic_array may be used to implement I/O buffering over a user-provided char array in portable manner.The text has been machine-translated via Google Translate.
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[Bearbeiten] Beispiel
Test für die stringstream die setbuf Funktionalität
Original:
Test for the stringstream's setbuf functionality
The text has been machine-translated via Google Translate.
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#include <iostream> #include <sstream> int main() { std::ostringstream ss; char c[1024] = {}; ss.rdbuf()->pubsetbuf(c, 1024); ss << 3.14 << '\n'; std::cout << c << '\n'; }
Output:
3.14 (on GNU g++/libstdc++ and SunPro C++/roguewave) <nothing> (on MS Visual Studio 2010, SunPro C++/stlport4, CLang++/libc++)
[Bearbeiten] Siehe auch
| Beruft setbuf() Original: invokes setbuf() The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion of std::basic_streambuf)
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