Пространства имён
Варианты
Действия

std::setlocale

Материал из cppreference.com

This page has been machine-translated from the English version of the wiki using Google Translate.

The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here.

Click here for the English version of this page

 
C++
 
Локализация библиотеки
Языки и граней
Original:
Locales and facets
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
locale
Персонаж классификации
Original:
Character classification
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Преобразования
Original:
Conversions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Facet классов категории базу
Original:
Facet category base classes
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Facet категорий
Original:
Facet categories
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Язык конкретных аспектов
Original:
Locale-specific facets
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Код аспекты преобразования
Original:
Code conversion facets
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
codecvt_utf8(C++11)
codecvt_utf16(C++11)
C локали
Original:
C locale
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
setlocale
localeconv
lconv
 
Заголовочный файл <clocale>
char* setlocale( int category, const char* locale);
setlocale функция устанавливает указанной локали системы или ее часть, как новый язык C. Изменения остаются в силе и влияет на выполнение всех зависящих от языка C библиотечных функций до следующего вызова setlocale. Если locale является нулевым указателем, setlocale запрашивает текущий стандарт C без изменения его.
Original:
The setlocale function installs the specified system locale or its portion as the new C locale. The modifications remain in effect and influences the execution of all locale-sensitive C library functions until the next call to setlocale. If locale is a null pointer, setlocale queries the current C locale without modifying it.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Содержание

[править] Параметры

category -
язык идентификатор категории, одна из <div class="t-tr-text">LC_xxx
Original:
LC_xxx
The text has been machine-translated via [http://translate.google.com Google Translate].
You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.
макросов. Может быть нулевым .
Original:
locale category identifier, one of the
LC_xxx
Original:
LC_xxx
The text has been machine-translated via [http://translate.google.com Google Translate].
You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.
</div> macros. May be null.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
locale -
Система конкретных идентификатор языка. Может быть "" для пользователей предпочтительный язык или "C" для минимального стандарта
Original:
system-specific locale identifier. Can be "" for the user-preferred locale or "C" for the minimal locale
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[править] Возвращаемое значение

Указатель на узкой нулем строку определения языка C после применения изменений, если таковые имеются, или нулевой указатель в случае неудачи.
Original:
Pointer to a narrow null-terminated string identifying the C locale after applying the changes, if any, or null pointer on failure.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[править] Notes

Во время запуска программы, эквивалент std::setlocale(LC_ALL, "C"); выполняется перед любым пользователем код запускается.
Original:
During program startup, the equivalent of std::setlocale(LC_ALL, "C"); is executed before any user code is run.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Хотя возвращение типа char*, изменения, то к символов неопределенное поведение.
Original:
Although the return type is char*, modifying the pointed-to characters is undefined behavior.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Потому что setlocale изменяет глобальное состояние которых влияет на выполнение локали-зависимых функций, это неопределенное поведение, чтобы вызвать его из одной нити, а другой поток выполняет любую из следующих функций: std::fprintf, std::isprint, std::iswdigit, std::localeconv, std::tolower, std::fscanf, std::ispunct, std::iswgraph, std::mblen, std::toupper, std::isalnum, std::isspace, std::iswlower, std::mbstowcs, std::towlower, std::isalpha, std::isupper, std::iswprint, std::mbtowc, std::towupper, std::isblank, std::iswalnum, std::iswpunct, std::setlocale, std::wcscoll, std::iscntrl, std::iswalpha, std::iswspace, std::strcoll, std::wcstod, std::isdigit, std::iswblank, std::iswupper, std::strerror, std::wcstombs, std::isgraph, std::iswcntrl, std::iswxdigit, std::strtod, std::wcsxfrm, std::islower, std::iswctype, std::isxdigit.
Original:
Because setlocale modifies global state which affects execution of locale-dependent functions, it is undefined behavior to call it from one thread, while another thread is executing any of the following functions: std::fprintf, std::isprint, std::iswdigit, std::localeconv, std::tolower, std::fscanf, std::ispunct, std::iswgraph, std::mblen, std::toupper, std::isalnum, std::isspace, std::iswlower, std::mbstowcs, std::towlower, std::isalpha, std::isupper, std::iswprint, std::mbtowc, std::towupper, std::isblank, std::iswalnum, std::iswpunct, std::setlocale, std::wcscoll, std::iscntrl, std::iswalpha, std::iswspace, std::strcoll, std::wcstod, std::isdigit, std::iswblank, std::iswupper, std::strerror, std::wcstombs, std::isgraph, std::iswcntrl, std::iswxdigit, std::strtod, std::wcsxfrm, std::islower, std::iswctype, std::isxdigit.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[править] Пример

#include <cstdio>
#include <clocale>
#include <ctime>
#include <cwchar>
 
int main()
{
    // the C locale will be UTF-8 enabled English;
    // decimal dot will be German
    // date and time formatting will be Japanese
    std::setlocale(LC_ALL, "en_US.UTF-8");
    std::setlocale(LC_NUMERIC, "de_DE");
    std::setlocale(LC_TIME, "ja_JP");
 
    wchar_t str[100];
    std::time_t t = std::time(NULL);
    std::wcsftime(str, 100, L"%A %c", std::localtime(&t));
    std::wprintf(L"Number: %.2f\nDate: %Ls\n", 3.14, str);
}

Вывод: 

Number: 3,14
Date: 月曜日 2011年12月19日 18時04分40秒

[править] См. также
локали категории std::setlocale
Original:
locale categories for std::setlocale
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(константа-макрос) [edit]
Набор полиморфных аспекты, которые инкапсулируют культурные различия
Original:
set of polymorphic facets that encapsulate cultural differences
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(класс) [edit]
C документация для setlocale
Источник — «http://ru.cppreference.com/mwiki/index.php?title=cpp/locale/setlocale&oldid=30885»