std::codecvt::encoding, std::codecvt::do_encoding
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<tbody> </tbody>| Dclar dans l'en-tte <locale>
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public: int encoding() const |
(1) | |
protected: int do_encoding() const |
(2) | |
1)
fonction de membre du public, appelle le
do_encoding fonction membre de la classe la plus drive .Original:
public member function, calls the member function
do_encoding of the most derived class.The text has been machine-translated via Google Translate.
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2)
si le codage reprsent par cette facette codecvt mappe chaque caractre interne de la mme, le nombre de caractres externes constant, le rendement de ce nombre. Si le codage est de longueur variable (par exemple UTF-8 ou UTF-16), retourne
0. Si le codage est dpendant de l'tat, -1 retour .Original:
if the encoding represented by this codecvt facet maps each internal character to the same, constant number of external characters, returns that number. If the encoding is variable-length (e.g. UTF-8 or UTF-16), returns
0. If the encoding is state-dependent, returns -1.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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Retourne la valeur
Le nombre exact de caractres
externT qui correspondent un caractre internT, s'il est constant. 0 si le nombre varie, -1 si l'encodage est dpendant de l'tat .Original:
The exact number of
externT characters that correspond to one internT character, if constant. 0 if the number varies, -1 if the encoding is state-dependent.The text has been machine-translated via Google Translate.
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La spcialisation non-conversion
std::codecvt<char, char, std::mbstate_t> retours 1Original:
The non-converting specialization
std::codecvt<char, char, std::mbstate_t> returns 1The text has been machine-translated via Google Translate.
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Exceptions
Exemple
#include <locale>
#include <iostream>
int main()
{
std::cout << "en_US.utf8 is a variable-length encoding, encoding() returns "
<< std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t>>(
std::locale("en_US.utf8")
).encoding() << '\n';
std::cout << "zh_CN.gb18030 is also variable-length, encoding() == "
<< std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t>>(
std::locale("zh_CN.gb18030")
).encoding() << '\n';
std::cout << "ru_RU.koi8r is a single-byte encoding encoding() == "
<< std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t>>(
std::locale("ru_RU.koi8r")
).encoding() << '\n';
}
Rsultat :
en_US.utf8 is a variable-length encoding, encoding() returns 0
zh_CN.gb18030 is also variable-length, encoding() == 0
ru_RU.koi8r is a single-byte encoding encoding() == 1
Voir aussi
MB_CUR_MAX |
nombre maximal d'octets dans un caractre multi-octets dans le courant C locale
( variable de macro ) Original: macro variable The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. Original: maximum number of bytes in a multibyte character in the current C locale ( variable de macro ) Original: macro variable The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[ virtuel ]Original: virtual The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
retourne le nombre de caractres maximum Externt qui pourraient tre transforms en un seul caractre Internt Original: returns the maximum number of externT characters that could be converted into a single internT character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre virtuelle protge) |