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std::setlocale

De cppreference.com
< cpp‎ | locale

 
 
Localizaciones biblioteca
Locales y facetas
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Locales and facets
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locale
Carácter clasificación
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Character classification
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Conversiones
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Conversions
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Facet clases categoría base
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Facet category base classes
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Categorías faceta
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Facet categories
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Específico de la localidad facetas
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Locale-specific facets
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Facetas código de conversión
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Code conversion facets
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codecvt_utf8(C++11)
codecvt_utf16(C++11)
C locale
Original:
C locale
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setlocale
localeconv
lconv
 
Defined in header <clocale>
char* setlocale( int category, const char* locale);
La función setlocale instala la configuración regional del sistema especificado o su porción como el nuevo entorno nacional C. Las modificaciones permanecerán vigentes e influye en la ejecución de todas las funciones de la biblioteca C sensibles al entorno local hasta la siguiente llamada a setlocale. locale Si es un puntero nulo, setlocale consulta el entorno nacional C actual sin modificarlo .
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.
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Contenido

[editar] Parámetros

category - . Puede ser nulo .
Original:
locale -
específica del sistema de identificador de configuración regional. Puede ser "" para la configuración regional preferido por el usuario o "C" para la configuración regional mínimo
Original:
system-specific locale identifier. Can be "" for the user-preferred locale or "C" for the minimal locale
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[editar] Valor de retorno

Puntero a una estrecha terminada en nulo cadena que identifica el entorno nacional C después de aplicar los cambios, si los hay, o un puntero nulo en caso de fallo .
Original:
Pointer to a narrow null-terminated string identifying the C locale after applying the changes, if any, or null pointer on failure.
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[editar] Notas

Durante el inicio del programa, el equivalente a std::setlocale(LC_ALL, "C"); se ejecuta antes de cualquier código de usuario que se ejecuta .
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During program startup, the equivalent of std::setlocale(LC_ALL, "C"); is executed before any user code is run.
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Aunque el tipo de retorno es char*, la modificación de los caracteres apuntados a un comportamiento no definido .
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Although the return type is char*, modifying the pointed-to characters is undefined behavior.
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Porque setlocale modifica mundial Estado que afecta a la ejecución de las funciones que dependen de la configuración regional, es un comportamiento indefinido para llamarlo de un hilo, mientras que otro hilo está ejecutando cualquiera de las siguientes funciones: 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 .
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[editar] Ejemplo

#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);
}

Output:

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

[editar] Ver también

categorías de entorno local para std::setlocale
Original:
locale categories for std::setlocale
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(macro constante) [edit]
conjunto de facetas polimórficos que encapsulan las diferencias culturales
Original:
set of polymorphic facets that encapsulate cultural differences
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(clase) [edit]
C documentation for setlocale