Function LegacyFileCPToUTF8

Rapfi/core/utils.cpp:131–180

// -------------------------------------------------

std::string LegacyFileCPToUTF8(std::string str)
{
#if defined(_WIN32)
    if (str.empty())
        return {};

    int nCodePage = Config::DatabaseLegacyFileCodePage;
    // Use system's active code page if not specified
    if (nCodePage == 0)
        nCodePage = GetACP();
    int wideSize = MultiByteToWideChar(nCodePage, 0, str.c_str(), (int)str.length(), nullptr, 0);
    if (!wideSize)
        return {};  // error

    std::wstring wstr(wideSize + 1, '\0');
    if (!MultiByteToWideChar(nCodePage,
                             0,
                             str.c_str(),
                             (int)str.length(),
                             wstr.data(),
                             (int)wstr.size()))
        return {};  // error

    int utf8Size = WideCharToMultiByte(CP_UTF8,
                                       0,
                                       wstr.c_str(),
                                       (int)wstr.length(),
                                       nullptr,
                                       0,
                                       nullptr,
                                       nullptr);
    if (!utf8Size)
        return {};  // error

    std::string utf8str(utf8Size, '\0');
    if (!WideCharToMultiByte(CP_UTF8,
                             0,
                             wstr.c_str(),
                             (int)wstr.length(),
                             utf8str.data(),
                             (int)utf8str.size(),
                             nullptr,
                             nullptr))
        return {};  // error

    return utf8str;
#else
    return str;
#endif
}

std::string ConsoleCPToUTF8(std::string str)
{