/***********************
 *
 *  KbdInput.cc - KbdInput class code
 *
 ***********************/

#include "KbdInput.hh"

#include <stdio.h>
#include <stdlib.h>
// #include <sgtty.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>

void dopexit(int);

struct termios KbdInput::raw;
struct termios KbdInput::hold;

KbdInput::KbdInput()
{
  rawInputIsOn = 0;
  signal(SIGINT, dopexit);
  fcntl(0, F_SETFL, O_NONBLOCK);   
  tcgetattr(0,&raw);
  tcgetattr(0,&hold);
  cfmakeraw(&raw);
  tcsetattr(0,TCSANOW,&KbdInput::raw);
  rawInputIsOn = 1;
}

KbdInput::~KbdInput()
{
  fcntl(0, F_SETFL, 0);
  tcsetattr(0,TCSANOW,&KbdInput::hold);
  rawInputIsOn = 0;
}

char
KbdInput::nextChar()
{
  if (!rawInputIsOn) On();
  char thechar = getchar();
  return ( (thechar == -1) ? 0 : thechar );
}

void
KbdInput::Off()
{
  fcntl(0, F_SETFL, 0);
  tcsetattr(0,TCSANOW,&KbdInput::hold);
  rawInputIsOn = 0;
}

void
KbdInput::On()
{
  fcntl(0, F_SETFL, O_NONBLOCK);   
  tcsetattr(0,TCSANOW,&KbdInput::raw);
  rawInputIsOn = 1;
}

void
dopexit(int signal)
{
  fcntl(0, F_SETFL, 0);
  tcsetattr(0,TCSANOW,&KbdInput::hold);
  exit(signal);
}