Function wstr_to_utf8

common/str.h:161–189

}

astr_t wstr_to_utf8(const wstr_t &aWstr)
{
#if defined(_MSC_VER)
    int size = ::WideCharToMultiByte(
        CP_UTF8, 0, &aWstr[0], (int)aWstr.size(), nullptr, 0, nullptr, nullptr);
    astr_t result = "";

    if (size > 0)
    {
        result.resize(size + 1);
        ::WideCharToMultiByte(
            CP_UTF8, 0, &aWstr[0], (int)aWstr.size(), &result[0], size, nullptr, nullptr);
        result.resize(size); // result[size] = 0;
    }
#else
    mbstate_t state{};
    astr_t result{};
    auto p = aWstr.data();
    const auto size = wcsrtombs(nullptr, &p, 0, &state);
    if (size > 0)
    {
        result.resize(size + 1);
        wcsrtombs(&result[0], &p, size, &state);
        result.resize(size);
    }
#endif

    return result;
}

wstr_t wstr_from_utf8(const astr_t &aStr)
{