joystick sdl example

example.c

// emcc example.c -o example.html -g -s ASYNCIFY=1 -s PTHREAD_POOL_SIZE=2 -s USE_SDL=2 -s EXIT_RUNTIME=1
// clang example.c -o example -lsdl2 -g -I"$(dirname $(which emcc))/cache/sysroot/include/SDL2" && ./example

#include <stdio.h>
#include <SDL.h>

void print_joys()
{
	int num_joy, i;
	num_joy = SDL_NumJoysticks();
	printf("%d joysticks found\n", num_joy);
	for (i = 0; i < num_joy; i++)
	{
		SDL_Joystick *joystick = SDL_JoystickOpen(i);
		printf("%s\n", SDL_JoystickName(joystick));
	}
}

int main()
{
	if (SDL_Init(SDL_INIT_EVERYTHING - SDL_INIT_HAPTIC) < 0)
	{
		fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
		exit(1);
	}
	atexit(SDL_Quit);

	print_joys();

	SDL_Event event;
	while (SDL_WaitEvent(&event) >= 0)
	{
		switch (event.type)
		{
		case SDL_JOYDEVICEADDED:
			printf("added!\n");
			print_joys();
			break;
		case SDL_JOYDEVICEREMOVED:
			printf("removed!\n");
			print_joys();
			break;

		case SDL_KEYDOWN:
			return 0;
			break;

		case SDL_QUIT:

			return 0;
			break;
		}
	}

	return 0;
}