#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>

/* Use this variable to remember original terminal attributes. */

struct termios saved_attributes;

void reset_input_mode()
{
  tcsetattr (STDIN_FILENO, TCSANOW, &saved_attributes);
}

void set_input_mode()
{
  struct termios tattr;
  char *name;

  /* Make sure stdin is a terminal. */
  if (!isatty (STDIN_FILENO))
    {
      fprintf (stderr, "Not a terminal.\n");
      exit (EXIT_FAILURE);
    }

  /* Save the terminal attributes so we can restore them later. */
  tcgetattr (STDIN_FILENO, &saved_attributes);
  atexit (reset_input_mode);

  /* Set the funny terminal modes. */
  tcgetattr (STDIN_FILENO, &tattr);
  tattr.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
  tattr.c_cc[VMIN] = 1;
  tcsetattr (STDIN_FILENO, TCSAFLUSH, &tattr);
}

void delay(unsigned int ms)
{
  usleep(ms * 1000);
}

char isKeyPressed()
{
  char key_handler = 0;
  read(STDIN_FILENO, &key_handler, 1);
  if (key_handler > 0)
  {
    return 1;
  }
  return 0;
}

//int main()
//{
//  set_input_mode();
//  while (isKeyPressed() == 0) {}
//  printf("ok");
//  reset_input_mode();
//}