std::mbsinit — cppreference.com
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Si ps n'est pas un pointeur NULL, la fonction mbsinit détermine si l'objet pointé à std::mbstate_t décrit l'état de conversion initial .
Original:
If ps is not a null pointer, the mbsinit function determines whether the pointed-to std::mbstate_t object describes the initial conversion state.
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Notes
Bien qu'un initialisé à zéro std::mbstate_t représente toujours l'état de conversion initial, il peut y avoir d'autres valeurs de std::mbstate_t qui représentent également l'état de conversion initial .
Original:
Although a zero-initialized std::mbstate_t always represents the initial conversion state, there may be other values of std::mbstate_t that also represent the initial conversion state.
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Paramètres
| ps | - | pointeur vers l'objet std :: mbstate_t à examiner Original: pointer to the std::mbstate_t object to examine The text has been machine-translated via Google Translate. |
Retourne la valeur
0 si ps n'est pas un pointeur NULL et ne reporesent l'état initial de conversion, valeur différente de zéro autrement .
Original:
0 if ps is not a null pointer and does not reporesent the initial conversion state, nonzero value otherwise.
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Exemple
#include <clocale> #include <string> #include <iostream> #include <cwchar> int main() { // allow mbrlen() to work with UTF-8 multibyte encoding std::setlocale(LC_ALL, "en_US.utf8"); // UTF-8 narrow multibyte encoding std::string str = u8"水"; // or u8"\u6c34" or "\xe6\xb0\xb4" std::mbstate_t mb = std::mbstate_t(); (void)std::mbrlen(&str[0], 1, &mb); if (!std::mbsinit(&mb)) { std::cout << "After processing the first 1 byte of " << str << " the conversion state is not initial\n"; } (void)std::mbrlen(&str[1], str.size()-1, &mb); if (std::mbsinit(&mb)) { std::cout << "After processing the remaining 2 bytes of " << str << ", the conversion state is initial conversion state\n"; } }
Résultat :
After processing the first 1 byte of 水 the conversion state is not initial After processing the remaining 2 bytes of 水, the conversion state is initial conversion state
Voir aussi
informations sur l'état de conversion nécessaire pour parcourir les chaînes de caractères multi-octets Original: conversion state information necessary to iterate multibyte character strings The text has been machine-translated via Google Translate. (classe) [edit] | |