/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ident	"$Revision: 1.2 $"

#include <signal.h>
#include <termio.h>
#include <stdio.h>

/* gsi plotting output routines */
# define DOWN 012
# define UP 013
# define LEFT 010
# define RIGHT 040
# define BEL 007
# define ACK 006
# define CR 015
# define FF 014
# define VERTRESP 48
# define HORZRESP 60.
# define VERTRES 8.
# define HORZRES 6.
/* down is line feed, up is reverse line feed,
   left is backspace, right is space.  48 points per inch
   vertically, 60 horizontally */

int xnow, ynow;
struct termio ITTY, PTTY;
int OUTF;
float HEIGHT = 6.0, WIDTH = 6.0, OFFSET = 0.0;
int xscale, xoffset, yscale;
float botx = 0., boty = 0., obotx = 0., oboty = 0.;
float scalex = 1., scaley = 1.;

void
openpl (void)
{
	void reset();
		xnow = ynow = 0;
		OUTF = 1;
		printf("\r");
		ioctl(OUTF, TCGETA, &ITTY);
		signal (SIGINT, reset);
		PTTY = ITTY;
		PTTY.c_oflag &= ~(ONLCR|OCRNL|ONOCR|ONLRET);
		PTTY.c_cflag |= CSTOPB;
		ioctl(OUTF, TCSETAW, &PTTY);
		/* initialize constants */
		xscale  = 4096./(HORZRESP * WIDTH);
		yscale = 4096 /(VERTRESP * HEIGHT);
		xoffset = OFFSET * HORZRESP;
		return;
}

void
openvt(void)
{
	openpl();
}