std::basic_filebuf::setbuf

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<metanoindex/>

Paramtres

Retourne la valeur

Notes

• GCC 4.6 libstdc + +

  Original:

  GCC 4.6 libstdc++

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setbuf() ne peut tre appele lorsque le std::basic_filebuf n'est pas associ un fichier (autrement n'a pas d'effet). Avec un tampon fourni par l'utilisateur, la lecture du fichier se lit n-1 octets la fois .

Original:

setbuf() may only be called when the std::basic_filebuf is not associated with a file (has no effect otherwise). With a user-provided buffer, reading from file reads n-1 bytes at a time.

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• Clang + + + 3.0 libc

  Original:

  Clang++3.0 libc++

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setbuf() peut tre appele aprs l'ouverture du fichier, mais avant tout d'E / S (autrement peut se bloquer). Avec un tampon fourni par l'utilisateur, la lecture du fichier se lit plus grands multiples de 4096 qui s'inscrivent dans la mmoire tampon .

Original:

setbuf() may be called after opening the file, but before any I/O (may crash otherwise). With a user-provided buffer, reading from file reads largest multiples of 4096 that fit in the buffer.

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• Visual Studio 2010

  Original:

  Visual Studio 2010

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setbuf() peut tre appel tout moment, mme aprs un certain I / O a eu lieu. Contenu actuel de la mmoire tampon, le cas chant, sont perdus .

Original:

setbuf() may be called at any time, even after some I/O took place. Current contents of the buffer, if any, are lost.

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Exemple

#include <fstream>
#include <iostream>
#include <string>
int main()
{
        int cnt=0;
        std::ifstream file;
        char buf[10241];
        file.rdbuf()->pubsetbuf(buf, sizeof buf);
        file.open("/usr/share/dict/words");
        for(std::string line; getline(file, line); )
                cnt++;
        std::cout << cnt << '\n';
}

Voir aussi