SDL_GetKeyName but for mouse and joystick input - c

Question

I want to make a game where any action can be bound to any input, be it from a keyboard, mouse, controller. Think of scrollwheel bound to jump.
To do this I must be able to present the current bindings in a human readable fashion to the user in a UI, such as "Jump: spacebar" and "shoot: left mouse button".
Currently, in my input routine, I am converting a SDL_KeyboardEvent to a human readable string with SDL_GetKeyName(event.key.keysym.sym).
I'm looking for a way to convert the following events into human readable text:
SDL_JoyAxisEvent
SDL_JoyBallEvent
SDL_JoyButtonEvent
SDL_JoyDeviceEvent
SDL_JoyHatEvent
SDL_MouseButtonEvent
SDL_MouseMotionEvent
SDL_MouseWheelEvent
I would expect the function to output something like "scrollup" or "X button" or "move up" or "left mouse button" or "select button". Currently I am manually implementing this, but it just seems so cumbersome. I've already looked at the docs but I couldn't find anything.
Sidenote: the documentation does not reveal whether a string from SDL_GetKeyName needs to be freed or not. I'm currently not freeing it.
My code currently:
SDL_WaitEvent(&event);
switch (event.type)
{
case SDL_QUIT:
quit = 1;
break;
case SDL_KEYDOWN:{
const char* a = SDL_GetKeyName(event.key.keysym.sym);
printf("Pressed down: %s\n", a);
break;
}
case SDL_KEYUP:{
const char* a = SDL_GetKeyName(event.key.keysym.sym);
printf("Released: %s\n", a);
break;
}
case SDL_MOUSEBUTTONUP:
case SDL_MOUSEBUTTONDOWN:
{
switch (event.button.button)
{
case SDL_BUTTON_LEFT:{
printf("LMB");
break;
}
case SDL_BUTTON_RIGHT:{
printf("RMB");
break;
}
case SDL_BUTTON_MIDDLE:{
printf("MMB");
break;
}
case SDL_BUTTON_X1:{
printf("X1");
break;
}
case SDL_BUTTON_X2:{
printf("X2");
break;
}
}
if (event.type == SDL_MOUSEBUTTONDOWN){
printf(" was clicked!\n");
} else {
printf(" was released!\n");
}
break;
}
case SDL_MOUSEMOTION:{
printf("Mouse moved to (%d, %d)\n", event.motion.x, event.motion.y);
break;
}
case SDL_MOUSEWHEEL:{
printf("Scrolled ");
if(event.wheel.y > 0){
printf("up\n");
}else if(event.wheel.y < 0){
printf("down\n");
}
if(event.wheel.x > 0){
printf("right\n");
}else if(event.wheel.x < 0){
printf("left\n");
}
break;
}
default:{
printf("Unsupported input method\n");
}
}