t450/common/subr.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <plot.h>
#include "con.h"

int xnow, ynow, OUTF;

int
xconv(int xp)
{
    /*
     * x position input is -2047 to +2047,
     * output must be 0 to PAGSIZ*HORZRES
     */
    xp += 2048;
    /* the computation is newx = xp*(PAGSIZ*HORZRES)/4096 */
    return (xoffset + xp / xscale);
}

int
yconv(int yp)
{
    /* see description of xconv */
    yp += 2048;
    return (yp / yscale);
}

void
inplot(void)
{
    spew(ESC);
    spew(PLOTIN);
}

void
outplot(void)
{
    spew(ESC);
    spew(PLOTOUT);
    (void) fflush(stdout);
}

void
spew(char ch)
{
    if (ch == UP) {
        (void) putc(ESC, stdout);
        ch = DOWN;
    }
    (void) putc(ch, stdout);
}

void
tobotleft(void)
{
    move(-2048, -2048);
}

void
reset(void)
{
    (void) signal(SIGINT, SIG_IGN);
    outplot();
    (void) ioctl(OUTF, TCSETAW, &ITTY);
    _exit(0);
}

float
dist2(int x1, int y1, int x2, int y2)
{
    float t, v;
    t = x2 - x1;
    v = y1 - y2;
    return (t * t + v * v);
}

void
swap(int *pa, int *pb)
{
    int t;
    t = *pa;
    *pa = *pb;
    *pb = t;
}

void
movep(int xg, int yg)
{
    int i;
    char ch;
    if ((xg == xnow) && (yg == ynow))
        return;
    /* if we need to go to left margin, just CR */
    if (xg < xnow / 2) {
        spew(CR);
        xnow = 0;
    }
    i = (int)((xg - xnow) / HORZRES);
    if (xnow < xg)
        ch = RIGHT;
    else ch = LEFT;
    xnow += i * HORZRES;
    i = abs(i);
    while (i--)
        spew(ch);
    i = abs(xg - xnow);
    inplot();
    while (i--)
        spew(ch);
    outplot();
    i = (int)((yg - ynow) / VERTRES);
    if (ynow < yg)
        ch = UP;
    else ch = DOWN;
    ynow += i * VERTRES;
    i = abs(i);
    while (i--)
        spew(ch);
    i = abs(yg - ynow);
    inplot();
    while (i--)
        spew(ch);
    outplot();
    xnow = xg; ynow = yg;
}

int
xsc(int xi)
{
    int xa;
    xa = (int)((xi - obotx) * scalex + botx);
    return (xa);
}

int
ysc(int yi)
{
    int ya;
    ya = (int)((yi - oboty) *scaley +boty);
    return (ya);
}