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/*
    SABRE Fighter Plane Simulator 
    Copyright (c) 1997 Dan Hammer
    Portions Donated By Antti Barck

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 1, or (at your option)
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifdef SABREWIN
int kbdin = 0;
#else
#include <stdio.h>
#include <ctype.h>
#include "pc_keys.h"
#include "kbdhit.h"
#include "vga.h"

/*
 Note: 12/14/97
 Use of vga_getkey for Version 0.2.2
 Replace with getchar() if strange
 or unexpected results are occurring
 */

// #define TESTME


KBHit kbhit;
int   kbdin = 0;

#ifdef TESTME
int main()
{
  char c;
  
  while(1)
    {
      if (c = kbhit.getch())
	{
	  printf("got char:\n");
	  printf("%c:%02x\n",c,(int)(unsigned char)c);
	  if (c== 'Q' || c=='q')
	    break;
	}
    }
  return (0);
}
#endif

KBHit::KBHit()
{

  tcgetattr(0,&oldios);
  newios = oldios;

  newios.c_lflag &= ~(ICANON | ECHO);
  newios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON);
  newios.c_cc[VMIN] = 0;	/* Making these 0 seems to have the */
  newios.c_cc[VTIME] = 0;	/* desired effect. */

  tcsetattr(0,TCSANOW,&newios);
  FD_ZERO(&rfds);
  FD_SET(0,&rfds);
}

int KBHit::kbdhit()
{
  struct timeval tv;
  tv.tv_sec = 0;
  tv.tv_usec = 0;
  FD_ZERO(&rfds);
  FD_SET(0,&rfds);
  return(select(1,&rfds,NULL,NULL,&tv));
}

int KBHit::getch()
{
  char c;
  if (kbdhit())
    {
      //      c = getchar();
      c = vga_getkey();
      if (c==ESC)
	{
	  //	  c = getchar();
	  c = vga_getkey();
	  if (c=='[')
	    c = vga_getkey();
	  else
	    {
	      putchar(c);
	      c = ESC;
	    }
	}
      tcflush(0,TCIFLUSH);
      kbdin = (int) c;
      return ((int)c);
    }
  else
    {
      kbdin = 0;
      return (0);
    }
}

KBHit::~KBHit()
{
  tcsetattr(0,TCSAFLUSH,&oldios);
}

#endif