Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_GetGamepadJoystick - Get the underlying joystick from a gamepad.
HEADER FILE
Defined in SDL3/SDL_gamepad.h
SYNOPSIS
#include "SDL3/SDL.h" SDL_Joystick * SDL_GetGamepadJoystick(SDL_Gamepad *gamepad);
DESCRIPTION
This function will give you a SDL_Joystick object, which allows you to use the SDL_Joystick functions with a SDL_Gamepad object. This would be useful for getting a joystick's position at any given time, even if it hasn't moved (moving it would produce an event, which would have the axis' value). The pointer returned is owned by the SDL_Gamepad . You should not call SDL_CloseJoystick () on it, for example, since doing so will likely cause SDL to crash.
FUNCTION PARAMETERS
gamepad the gamepad object that you want to get a joystick from.
RETURN VALUE
( SDL_Joystick *) Returns an SDL_Joystick object, or NULL on failure; call SDL_GetError () for more information.
AVAILABILITY
This function is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_GetGamepadJoystick(3)