/****************************/
/*  riflessi.c              */
/*                          */
/* richiede:                */
/*          kbhit.c         */
/*          my_rand.c       */
/*                          */
/*    GdA 14/09/09          */
/****************************/


#ifdef __cplusplus
  extern "C" {
#endif

#include <sys/time.h>


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

#ifndef STDIN_FILENO
  #define STDIN_FILENO 0
#endif

static struct termios termattr, save_termattr;
static int ttysavefd = -1;


void my_initrand(void);
float randfloat(void);

int main(int argc, char * argv[])
{
  unsigned char ch;

  struct timeval tt1;
  struct timezone ttz;
  double ts1, ts2, ts3, dt;

  float r;
  int rt, i, gotit;

  printf("Misura tempo di riflessi \n\n");
  printf("Dare Enter (Invia) dopo che viene visualizzato 'VAI'\n\n");
  printf("oppure Ctrl/C per interrompere il programma\n");

  /* inizializza random */
  my_initrand();
  
  for (i=0; i<10; i++) 
  {
    /* intervallo di attesa random (fra 1 e 3 secondi) */
    r = randfloat();
    rt = (int) ((r * 2. + 1) * 1000000);

    /* pausa e poi messaggio*/
    usleep(rt);
    printf ("\n   VAI \n");

    /* tempo iniziale     */
    gettimeofday(&tt1,&ttz);
    ts1= (double)(tt1.tv_sec)+(double)(tt1.tv_usec)/1000000;

    /* attesa                                            */
    set_tty_raw();         /* set up character-at-a-time */

    while (1)              /* wait here for a typed char */
    {
      gotit = 0;           /* diventa 1 se arriva Enter */
      usleep(1000);        /* 1/1000 di secondo */
      ch = kb_getc();      /* char typed by user? */
 
      if (0x0d == ch)      /* Enter */
      {
        gotit = 1;
        set_tty_cooked();  /*  restore normal TTY mode */
        gettimeofday(&tt1,&ttz);
        ts2= (double)(tt1.tv_sec)+(double)(tt1.tv_usec)/1000000;
        dt = ts2-ts1;
        /* printf ("\n \n ts1 %f, ts2 %f    dt = %f \n", ts1, ts2, dt); */
        printf ("\n %d)   %f s\n", i+1, dt);
      } 
      if (gotit) 
      { 
        gotit = 0; 
        break;
      }
      if (0x03 == ch)      /* might be control-C */
      {
        set_tty_cooked();  /* control-C, restore normal TTY mode */
        return 1;          /* and get out */
      }    
      echo(ch);            /* not control-C, echo it */
    }
  }
}

#ifdef __cplusplus
}
#endif