keyboard.c

#include "keyboard.h"
#include <fcntl.h>
#include <linux/input.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int fd;
struct input_event ie;

// sudo evtest -> check which eventX has the keyboard
void open_keyboard() {
  fd = open("/dev/input/event3", O_RDONLY | O_NONBLOCK);
  if (fd == -1) {
    printf("Need to run as root!\n");
    exit(1);
  }
}

// https://www.kernel.org/doc/Documentation/input/input.txt
void manage_input(Game *game) {
  int bytes = read(fd, &ie, sizeof(ie));
  if (bytes > 0 && ie.type == EV_KEY && ie.value == 1) {
    if (ie.code == KEY_F1) {
      game->options.health = !game->options.health;
      printf("f1 clicked: health status: %d\n", game->options.health);
    }
    if (ie.code == KEY_F2) {
      game->options.ammo = !game->options.ammo;
      printf("f2 clicked: ammo status: %d\n", game->options.ammo);
    }
  }
}