std::mbsinit
De cppreference.com
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<tbody> </tbody>| Definido no cabeçalho <cwchar>
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int mbsinit( const std::mbstate_t* ps); |
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Se
ps não é um ponteiro nulo, a função mbsinit determina se o objeto pontiagudo para std::mbstate_t descreve o estado de conversão inicial. 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. The text has been machine-translated via Google Translate.
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Notas
Embora um zero inicializado std::mbstate_t sempre representa o estado inicial de conversão, pode haver outros valores de std::mbstate_t que também representam o estado inicial de conversão.
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.
The text has been machine-translated via Google Translate.
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Parâmetros
| ps | - | pointer to the std::mbstate_t object to examine |
Valor de retorno
0 se ps não é um ponteiro nulo e não reporesent o estado de conversão inicial, valor diferente de zero caso contrário.Original:
0 if ps is not a null pointer and does not reporesent the initial conversion state, nonzero value otherwise.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Exemplo
#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";
}
}
Saída:
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