const char* SDL_GameControllerNameForIndex(int joystick_index)

for (int i = 0; i < SDL_NumJoysticks(); ++i)
{
    const char *name = SDL_GameControllerNameForIndex(i);
    if (name)
    {
        printf("Joystick %i has game controller name '%s'\n", i, name);
    }
    else
    {
        printf("Joystick %i has no game controller name.\n", i);
    }
}