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      std::setlocale

      De cppreference.com

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      <metanoindex/>

       
      C++
       
      Biblioteca localizações
      Localidades e facetas
      Original:
      Locales and facets
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      Classificação de caracteres
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      Character classification
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      Conversões
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      Conversions
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      Facet classes base da categoria
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      Facet category base classes
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      Categorias faceta
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      Facet categories
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      Específicos da localidade facetas
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      Locale-specific facets
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      Facetas de conversão de código
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      Code conversion facets
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      (C++11)
      (C++11)
      C localidade
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      C locale
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      <tbody> </tbody>
      Definido no cabeçalho <clocale>
      char* setlocale( int category, const char* locale);
      A função setlocale instala a localidade do sistema especificado ou a sua parte como a localidade C novo. As modificações continuam em vigor e influencia a execução de todos os sensíveis à localidade funções de biblioteca C até a próxima chamada para setlocale. Se locale é um ponteiro nulo, setlocale consulta a localidade C atual, sem modificá-lo.
      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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      Parâmetros

      category -
      localidade identificador categoria, uma das macros
      LC_xxx
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      LC_xxx
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      . Pode ser nulo .
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      locale category identifier, one of the
      LC_xxx
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      LC_xxx
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       macros. May be null.
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      locale -
      específico do sistema identificador de localidade. Pode ser "" para a localidade do usuário preferencial ou "C" para a localidade mínimo
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      system-specific locale identifier. Can be "" for the user-preferred locale or "C" for the minimal locale
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      Valor de retorno

      Ponteiro para uma string terminada em null estreita identificação da localidade C depois de aplicar as alterações, se houver, ou ponteiro nulo em caso de falha.
      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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      Notas

      Durante a inicialização do programa, o equivalente a std::setlocale(LC_ALL, "C"); é executada antes de qualquer código de usuário é executado.
      Original:
      During program startup, the equivalent of std::setlocale(LC_ALL, "C"); is executed before any user code is run.
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      Embora o tipo de retorno é char*, modificando os personagens apontados é um comportamento indefinido.
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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 o estado global, que afeta a execução da localidade funções dependentes, é um comportamento indefinido para chamá-lo a partir de um fio, enquanto outro segmento é a execução de qualquer das seguintes funções: 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.
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      Exemplo

      #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);
}

      Saída: 

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

      Veja também
      categorias locais para std::setlocale
      Original:
      locale categories for std::setlocale
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      (macro constante) [edit]
      conjunto de aspectos polimórficos que encapsulam as diferenças culturais
      Original:
      set of polymorphic facets that encapsulate cultural differences
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      (classe) [edit]
      Documentação C para setlocale
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