Function getDeviceName

src/SFML/Window/Win32/JoystickImpl.cpp:122–201

Get the joystick's name

// Get the joystick's name
sf::String getDeviceName(unsigned int index, JOYCAPS caps)
{
    // Give the joystick a default name
    static const sf::String joystickDescription = "Unknown Joystick";

    LONG                     result     = 0;
    HKEY                     rootKey    = nullptr;
    HKEY                     currentKey = nullptr;
    std::basic_string<TCHAR> subkey;

    subkey = REGSTR_PATH_JOYCONFIG;
    subkey += TEXT('\\');
    subkey += caps.szRegKey;
    subkey += TEXT('\\');
    subkey += REGSTR_KEY_JOYCURR;

    rootKey = HKEY_CURRENT_USER;
    result  = RegOpenKeyEx(rootKey, subkey.c_str(), 0, KEY_READ, &currentKey);

    if (result != ERROR_SUCCESS)
    {
        rootKey = HKEY_LOCAL_MACHINE;
        result  = RegOpenKeyEx(rootKey, subkey.c_str(), 0, KEY_READ, &currentKey);

        if (result != ERROR_SUCCESS)
        {
            sf::err() << "Unable to open registry for joystick at index " << index << ": "
                      << sf::priv::getErrorString(static_cast<DWORD>(result)) << std::endl;
            return joystickDescription;
        }
    }

    std::basic_ostringstream<TCHAR> indexString;
    indexString << index + 1;

    subkey = TEXT("Joystick");
    subkey += indexString.str();
    subkey += REGSTR_VAL_JOYOEMNAME;

    std::array<TCHAR, 256> keyData{};
    DWORD                  keyDataSize = sizeof(keyData);

    result = RegQueryValueEx(currentKey, subkey.c_str(), nullptr, nullptr, reinterpret_cast<LPBYTE>(keyData.data()), &keyDataSize);
    RegCloseKey(currentKey);

    if (result != ERROR_SUCCESS)
    {
        sf::err() << "Unable to query registry key for joystick at index " << index << ": "
                  << sf::priv::getErrorString(static_cast<DWORD>(result)) << std::endl;
        return joystickDescription;
    }

    subkey = REGSTR_PATH_JOYOEM;
    subkey += TEXT('\\');
    subkey.append(keyData.data(), keyDataSize / sizeof(TCHAR));

    result = RegOpenKeyEx(rootKey, subkey.c_str(), 0, KEY_READ, &currentKey);