Set the current mapping of a joystick or gamepad.
int SDL_SetGamepadMapping(SDL_JoystickID instance_id, const char *mapping);
|instance_id||the joystick instance ID|
|mapping||the mapping to use for this device, or NULL to clear the mapping|
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Details about mappings are discussed with SDL_AddGamepadMapping().
This function is available since SDL 3.0.0.