Namespace
Varianti

std::wcsncpy

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< cpp‎ | string‎ | wide

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C++
 
Stringhe libreria
Null-stringhe terminate
Original:
Null-terminated strings
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Byte stringhe
Multibyte stringhe
Stringhe larghe
Classi
Original:
Classes
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basic_string
char_traits
 
Stringhe larghe null-terminated
Funzioni
Original:
Functions
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Carattere manipolazione
Original:
Character manipulation
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Le conversioni in formati numerici
Original:
Conversions to numeric formats
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Della gestione delle stringhe
Original:
String manipulation
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Matrice manipolazione
Original:
Array manipulation
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wmemcpy
wmemmove
wmemcmp
wmemchr
wmemset
 
Elemento definito nell'header <cwchar>
wchar_t *wcsncpy( wchar_t *dest, const wchar_t *src, std::size_t count );
Copie a personaggi più count della stringa puntata da ampia src (incluso il carattere nullo di terminazione grandangolo) a matrice di caratteri gamma puntato da dest.
Original:
Copies at most count characters of the wide string pointed to by src (including the terminating null wide character) to wide character array pointed to by dest.
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Se count viene raggiunto prima della src intera stringa è stata copiata, la matrice risultante di caratteri estesi non è null-terminated.
Original:
If count is reached before the entire string src was copied, the resulting wide character array is not null-terminated.
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Se, dopo aver copiato il carattere nullo di terminazione larga da src, count non viene raggiunto, ulteriori caratteri null larghi vengono scritti dest fino al totale di caratteri count sono stati scritti.
Original:
If, after copying the terminating null wide character from src, count is not reached, additional null wide characters are written to dest until the total of count characters have been written.
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Se le stringhe si sovrappongono, il comportamento non è definito.
Original:
If the strings overlap, the behavior is undefined.
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Indice

[modifica] Parametri

dest -
puntatore alla matrice di caratteri estesi in cui copiare
Original:
pointer to the wide character array to copy to
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src -
puntatore alla stringa ampia da cui copiare
Original:
pointer to the wide string to copy from
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count -
il numero massimo di caratteri larghi da copiare
Original:
maximum number of wide characters to copy
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[modifica] Valore di ritorno

dest

[modifica] Note

Nell'uso tipico, count è la dimensione della matrice di destinazione.
Original:
In typical usage, count is the size of the destination array.
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[modifica] Esempio

#include <iostream>
#include <cwchar>
 
int main()
{
    wchar_t src[] = L"hi";
    wchar_t dest[6] = {L'a', L'b', L'c', L'd', L'e', L'f'};;
 
    std::wcsncpy(dest, src, 5); // this will copy hi and repeat \0 three times
 
    std::wcout << "The contents of dest are: ";
    for(wchar_t c : dest) {
        if(c)
            std::wcout << c << ' ';
        else
            std::wcout << "\\0" << ' ';
    }
    std::wcout << '\n';
}

Output: 

The contents of dest are: h i \0 \0 \0 f

[modifica] Vedi anche
copia una stringa larga ad un altro
Original:
copies one wide string to another
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(funzione) [modifica]
copia un certo numero di caratteri estesi tra due matrici non si sovrappongono
Original:
copies a certain amount of wide characters between two non-overlapping arrays
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(funzione) [modifica]
C documentation for wcsncpy
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/string/wide/wcsncpy&oldid=26835"