Langinfo.h in Visual Studio 2010

问题

How can I include into my Visual Studio 2010 C-project langinfo.h. I've tried #include <langinfo.h>, but it seems there is no such header file in the VS 2010 environment. I need to get the starting weekday for the locale, but I now the way only using this library. So, the question is how to solve my problem: how to include langinfo.h, or how to get the current locale starting weekday.

回答1:

I think, you should use GetLocaleInfoEx() function. For example, to get the starting day of a week these calls might be used:

# if defined(_WIN32_WINNT_VISTA) && WINVER >= _WIN32_WINNT_VISTA && defined(LOCALE_NAME_USER_DEFAULT)
    GetLocaleInfoEx(LOCALE_NAME_USER_DEFAULT, LOCALE_IFIRSTDAYOFWEEK, wsDay, 4)
# else
    GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_IFIRSTDAYOFWEEK, wsDay, 4)
# endif

More info about this function can be found at http://msdn.microsoft.com/en-us/library/dd318103%28v=vs.85%29.aspx

回答2:

Here is a small example program first_weekday.c, which gets the first day of the week. Furthermore, values and sizes of used variables are printed.
GetLocalInfoEx() stores the first day of the week in the variable week_1stday.
However, on Windows we have: 0:Monday, ... 6:Sunday (see: LOCALE_IFIRSTDAYOFWEEK).
Therefore a calculation is included here, in order to get 0:Sunday, 1:Monday, ...
The number for the first day of the week is stored then in first_weekday

#include <stdio.h>
#include <windows.h>

int main(
    )
{
    int       ret;
    int       first_weekday;
    DWORD     week_1stday;

    ret = GetLocaleInfoEx(LOCALE_NAME_USER_DEFAULT,
                          LOCALE_IFIRSTDAYOFWEEK | LOCALE_RETURN_NUMBER,
                          (LPWSTR) & week_1stday,
                          sizeof(week_1stday) / sizeof(WCHAR));
    /* 0:Monday, ..., 6:Sunday. */
    /* We need 1 for Monday, 0 for Sunday. */
    first_weekday = (week_1stday + 1) % 7;
    printf("ret = %d\n", ret);
    printf("sizeof(ret) = %Iu\n", sizeof(ret));
    printf("sizeof(week_1stday) = %Iu\n", sizeof(week_1stday));
    printf("sizeof(WCHAR) = %Iu\n", sizeof(WCHAR));
    printf("week_1stday = %lu\n", week_1stday);
    printf("first_weekday = %d\n", first_weekday);
    return 0;
}

See also:
GetLocaleInfoEx function
LOCALE_IFIRSTDAYOFWEEK

来源：https://stackoverflow.com/questions/11602425/langinfo-h-in-visual-studio-2010

标签

windows

visual-studio

localization

locale