jfh@rpp386.cactus.org (John F. Haugh II) (02/20/90)
I wrote this a while ago and recently fixed something. I forget what
I fixed, but I know it made it work better with GNUPLOT. Save the
rest of this file as "therc.c" then follow the directions.
--
#include <stdio.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/comcrt.h>
#include <sys/machdep.h>
#include <sys/sysmacros.h>
/*
* Copyright 1988, 1990, John F. Haugh II
* All rights reserved.
*
* Recipient is free to use and distribute this code as they see fit,
* provided they do not restrict the rights of other recipients to use
* and distribute in a like manner. This code may be used for commercial
* uses provided the author is given credit. Distribution with
* commercial products requires credit be given the author in the
* documentation included with this software.
*
* Under no circumstances may this copyright notice be modified or
* removed. THIS COPYRIGHT IS INTENDED TO HAVE LEGAL SIGNIFICANCE.
* CONTACT AN ATTORNEY OR THE AUTHOR IF YOU HAVE ANY QUESTION REGARDING
* YOUR RIGHTS. It is the intent of this copyright to insure free use
* and distribution for all parties. PERSONS RESTRICTING THE RIGHTS OF
* OTHERS TO FREELY DISTRIBUTE THIS SOFTWARE WILL BE PROSECUTED.
*
* For more information or bug reports, you may contact the author at:
*
* John F. Haugh II
* 3220 Duval Rd, Apt 1513
* Austin, TX 78759
* (512) 832-8832
*
* UUCP: jfh@rpp386.cactus.org
*/
/*
* How to compile:
*
* first, select PIX_HORZ to suit your fancy. i suggest you use
* the square version only if drawing boxes and circles. plots
* look better if full-screen.
*
* then, pick your cc command from below:
*
* cc -o therc -M3 -Ox -s therc.c
* - or -
* cc -o therc -M2l -Ox -s therc.c
*
* How to use:
* therc [ from a file or pipe ]
* therc plotfile [ from a plot format file ]
*
* Pressing <DEL> (or whatever your interrupt key is) will produce the
* next screen. Pressing <QUIT> should cause an exit. Warning: this
* command is not for novice users. Resetting the screen can be quite
* involved! In particular, don't pipe GNUPLOT or anything else into
* this command since your characters you type will disappear!
*/
/*
* produces an almost square display
*/
#define PIX_SQUARE 550L
/*
* produces a full screen (but not square) display
*/
#define PIX_FULL 720L
#define PIX_VERT 348L
int PIX_HORZ = PIX_FULL;
int cur_x;
int cur_y;
int off_x;
int off_y;
int x_scale;
int y_scale;
int is_blank = 1;
int hflg;
char *malloc ();
#ifdef M_286
char far *scrmem;
#else
char *scrmem;
#endif
int screenfd;
int savemode;
int scrdesc;
#define swap(a,b) { a ^= b; b ^= a; a ^= b; }
short bits[8] = {
0200, 0100, 040, 020, 010, 04, 02, 01
};
short dotted[16] = {
1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0
};
short solid[16] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
};
short longdashed[16] = {
1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0
};
short shortdashed[16] = {
1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0
};
short dotdashed[16] = {
1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0
};
short *line = solid;
#ifndef MAXPLT
#define MAXPLT 1024
#endif
int PLTSIZ = MAXPLT;
int blank = 1;
typedef char letter_t[12];
static letter_t letters[128] = {
/* */ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
/* ! */ {0x00,0x00,0x18,0x18,0x00,0x18,0x18,0x3c,0x3c,0x3c,0x18,0x00},
/* " */ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x22,0x63,0x63,0x63,0x00},
/* # */ {0x00,0x00,0x36,0x36,0x7f,0x36,0x36,0x36,0x7f,0x36,0x36,0x00},
/* $ */ {0x00,0x0c,0x0c,0x7e,0xc3,0x03,0x7e,0xc0,0xc3,0x7e,0x0c,0x0c},
/* % */ {0x00,0x00,0xc3,0x63,0x30,0x18,0x0c,0x06,0xc3,0xc1,0x00,0x00},
/* & */ {0x00,0x00,0x76,0xcc,0xcc,0xdc,0x76,0x38,0x6c,0x6c,0x38,0x00},
/* ' */ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x30,0x30,0x30,0x00},
/* ( */ {0x00,0x00,0x0c,0x18,0x30,0x30,0x30,0x30,0x18,0x0c,0x00,0x00},
/* ) */ {0x00,0x00,0x30,0x18,0x0c,0x0c,0x0c,0x0c,0x18,0x30,0x00,0x00},
/* * */ {0x00,0x00,0x00,0x00,0x66,0x3c,0xff,0x3c,0x66,0x00,0x00,0x00},
/* + */ {0x00,0x00,0x00,0x18,0x18,0x18,0xff,0x18,0x18,0x18,0x00,0x00},
/* , */ {0x00,0x00,0x60,0x30,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
/* - */ {0x00,0x00,0x00,0x00,0x00,0x00,0xfe,0x00,0x00,0x00,0x00,0x00},
/* . */ {0x00,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
/* / */ {0x00,0x00,0x80,0xc0,0x60,0x30,0x18,0x0c,0x06,0x03,0x01,0x00},
/* 0 */ {0x00,0x00,0x7e,0xc3,0xe3,0xf3,0xdb,0xcf,0xc7,0xc3,0x7e,0x00},
/* 1 */ {0x00,0x00,0x3f,0x0c,0x0c,0x0c,0x0c,0x0c,0x3c,0x1c,0x0c,0x00},
/* 2 */ {0x00,0x00,0x7f,0x63,0x30,0x18,0x0c,0x06,0x03,0x63,0x3e,0x00},
/* 3 */ {0x00,0x00,0x7e,0xc3,0x03,0x03,0x3e,0x03,0x03,0xc3,0x7e,0x00},
/* 4 */ {0x00,0x00,0x0f,0x06,0x06,0x7f,0x66,0x36,0x1e,0x0e,0x06,0x00},
/* 5 */ {0x00,0x00,0x7e,0xc3,0x03,0x03,0xfe,0xc0,0xc0,0xc0,0xff,0x00},
/* 6 */ {0x00,0x00,0x7e,0xc3,0xc3,0xc3,0xfe,0xc0,0xc0,0x60,0x3c,0x00},
/* 7 */ {0x00,0x00,0x18,0x18,0x18,0x18,0x0c,0x06,0x03,0x63,0x7f,0x00},
/* 8 */ {0x00,0x00,0x7e,0xc3,0xc3,0xc3,0x7e,0xc3,0xc3,0xc3,0x7e,0x00},
/* 9 */ {0x00,0x00,0x3c,0x06,0x03,0x03,0x7f,0xc3,0xc3,0xc3,0x7e,0x00},
/* : */ {0x00,0x00,0x00,0x18,0x18,0x00,0x00,0x00,0x18,0x18,0x00,0x00},
/* ; */ {0x00,0x00,0x30,0x18,0x18,0x00,0x00,0x00,0x18,0x18,0x00,0x00},
/* < */ {0x00,0x00,0x03,0x06,0x0c,0x18,0x30,0x18,0x0c,0x06,0x03,0x00},
/* = */ {0x00,0x00,0x00,0x00,0x3e,0x00,0x00,0x00,0x3e,0x00,0x00,0x00},
/* > */ {0x00,0x00,0x30,0x18,0x0c,0x06,0x03,0x06,0x0c,0x18,0x30,0x00},
/* ? */ {0x00,0x00,0x0c,0x0c,0x00,0x0c,0x0c,0x06,0x63,0x63,0x3e,0x00},
/* @ */ {0x00,0x00,0x3f,0x60,0x6e,0x6f,0x6f,0x6f,0x63,0x63,0x3e,0x00},
/* A */ {0x00,0x00,0x63,0x63,0x63,0x7f,0x63,0x63,0x36,0x1c,0x08,0x00},
/* B */ {0x00,0x00,0xfe,0x63,0x63,0x63,0x7e,0x63,0x63,0x63,0xfe,0x00},
/* C */ {0x00,0x00,0x1e,0x33,0x61,0x60,0x60,0x60,0x61,0x33,0x1e,0x00},
/* D */ {0x00,0x00,0xfc,0x66,0x63,0x63,0x63,0x63,0x63,0x66,0xfc,0x00},
/* E */ {0x00,0x00,0x7f,0x33,0x31,0x34,0x3c,0x34,0x31,0x33,0x7f,0x00},
/* F */ {0x00,0x00,0x78,0x30,0x30,0x34,0x3c,0x34,0x31,0x33,0x7f,0x00},
/* G */ {0x00,0x00,0x1d,0x33,0x63,0x6f,0x60,0x60,0x61,0x33,0x1e,0x00},
/* H */ {0x00,0x00,0x63,0x63,0x63,0x63,0x7f,0x63,0x63,0x63,0x63,0x00},
/* I */ {0x00,0x00,0x3c,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x3c,0x00},
/* J */ {0x00,0x00,0x3c,0x66,0x66,0x06,0x06,0x06,0x06,0x06,0x0f,0x00},
/* K */ {0x00,0x00,0x73,0x33,0x36,0x36,0x3c,0x36,0x36,0x36,0x73,0x00},
/* L */ {0x00,0x00,0x7f,0x33,0x31,0x30,0x30,0x30,0x30,0x30,0x78,0x00},
/* M */ {0x00,0x00,0x63,0x63,0x63,0x63,0x63,0x6b,0x7f,0x77,0x63,0x00},
/* N */ {0x00,0x00,0x63,0x63,0x63,0x67,0x6f,0x7f,0x7b,0x73,0x63,0x00},
/* O */ {0x00,0x00,0x3c,0x66,0xc3,0xc3,0xc3,0xc3,0xc3,0x66,0x3c,0x00},
/* P */ {0x00,0x00,0x78,0x30,0x30,0x30,0x3e,0x33,0x33,0x33,0x7e,0x00},
/* Q */ {0x00,0x07,0x06,0x36,0x6f,0x6b,0x63,0x63,0x63,0x63,0x3e,0x00},
/* R */ {0x00,0x00,0x73,0x33,0x33,0x36,0x3e,0x33,0x33,0x33,0x7e,0x00},
/* S */ {0x00,0x00,0x3e,0x63,0x63,0x06,0x1c,0x30,0xc3,0xc3,0x3e,0x00},
/* T */ {0x00,0x00,0x3c,0x18,0x18,0x18,0x18,0x18,0x99,0xdb,0xff,0x00},
/* U */ {0x00,0x00,0x3e,0x63,0x63,0x63,0x63,0x63,0x63,0x63,0x63,0x00},
/* V */ {0x00,0x00,0x18,0x3c,0x66,0xc3,0xc3,0xc3,0xc3,0xc3,0xc3,0x00},
/* W */ {0x00,0x00,0x66,0x66,0xff,0xdb,0xdb,0xc3,0xc3,0xc3,0xc3,0x00},
/* X */ {0x00,0x00,0xc3,0xc3,0x66,0x3c,0x18,0x3c,0x66,0xc3,0xc3,0x00},
/* Y */ {0x00,0x00,0x3c,0x18,0x18,0x18,0x3c,0x66,0xc3,0xc3,0xc3,0x00},
/* Z */ {0x00,0x00,0xff,0xc3,0x61,0x30,0x18,0x0c,0x86,0xc3,0xff,0x00},
/* [ */ {0x00,0x00,0x3c,0x30,0x30,0x30,0x30,0x30,0x30,0x30,0x3c,0x00},
/* \ */ {0x00,0x00,0x01,0x03,0x06,0x0c,0x18,0x30,0x60,0xc0,0x80,0x00},
/* ] */ {0x00,0x00,0x3c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x3c,0x00},
/* ^ */ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc6,0x6c,0x38,0x10},
/* _ */ {0xff,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
/* ` */ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x60,0x60,0x60},
/* a */ {0x00,0x00,0x76,0xcc,0xcc,0x7c,0x0c,0x78,0x00,0x00,0x00,0x00},
/* b */ {0x00,0x00,0xfc,0x66,0x66,0x66,0x6c,0x78,0x60,0x60,0xe0,0x00},
/* c */ {0x00,0x00,0x7c,0xc6,0xc0,0xc0,0xc6,0x7c,0x00,0x00,0x00,0x00},
/* d */ {0x00,0x00,0x3f,0x66,0x66,0x66,0x36,0x1e,0x06,0x06,0x07,0x00},
/* e */ {0x00,0x00,0x7c,0xc6,0xc0,0xfe,0xc6,0x7c,0x00,0x00,0x00,0x00},
/* f */ {0x00,0x00,0x3c,0x18,0x18,0x18,0x3c,0x18,0x19,0x1b,0x0e,0x00},
/* g */ {0x7c,0xc6,0x06,0x7e,0xc6,0xc6,0xc6,0x7b,0x00,0x00,0x00,0x00},
/* h */ {0x00,0x00,0xe6,0x66,0x66,0x66,0x76,0x6c,0x60,0x60,0xe0,0x00},
/* i */ {0x00,0x00,0x3c,0x18,0x18,0x18,0x18,0x38,0x00,0x18,0x18,0x00},
/* j */ {0x3c,0x66,0x66,0x06,0x06,0x06,0x06,0x0e,0x00,0x06,0x06,0x00},
/* k */ {0x00,0x00,0xe6,0x66,0x6c,0x78,0x6c,0x66,0x60,0x60,0xe0,0x00},
/* l */ {0x00,0x00,0x3c,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x38,0x00},
/* m */ {0x00,0x00,0xdb,0xdb,0xdb,0xdb,0xff,0xe6,0x00,0x00,0x00,0x00},
/* n */ {0x00,0x00,0x63,0x63,0x63,0x63,0x73,0xde,0x00,0x00,0x00,0x00},
/* o */ {0x00,0x00,0x7e,0xc3,0xc3,0xc3,0xc3,0x7e,0x00,0x00,0x00,0x00},
/* p */ {0xf0,0x60,0x60,0x7e,0x63,0x63,0x73,0xde,0x00,0x00,0x00,0x00},
/* q */ {0x0f,0x06,0x06,0x7e,0xc6,0xc6,0xce,0x7b,0x00,0x00,0x00,0x00},
/* r */ {0x00,0x00,0xf0,0x60,0x60,0x63,0x73,0xde,0x00,0x00,0x00,0x00},
/* s */ {0x00,0x00,0x3c,0x66,0x1c,0x38,0x66,0x3c,0x00,0x00,0x00,0x00},
/* t */ {0x00,0x00,0x0c,0x1b,0x18,0x18,0x18,0x7e,0x18,0x18,0x08,0x00},
/* u */ {0x00,0x00,0x7b,0xce,0xc6,0xc6,0xc6,0xc6,0x00,0x00,0x00,0x00},
/* v */ {0x00,0x00,0x10,0x38,0x6c,0xc6,0xc6,0xc6,0x00,0x00,0x00,0x00},
/* w */ {0x00,0x00,0x66,0xff,0xdb,0xdb,0xc3,0xc3,0x00,0x00,0x00,0x00},
/* x */ {0x00,0x00,0xc6,0x6c,0x38,0x38,0x6c,0xc6,0x00,0x00,0x00,0x00},
/* y */ {0x78,0x0c,0x06,0x7e,0xc6,0xc6,0xc6,0xc6,0x00,0x00,0x00,0x00},
/* z */ {0x00,0x00,0xfe,0x66,0x30,0x18,0xcc,0xfe,0x00,0x00,0x00,0x00},
/* { */ {0x00,0x00,0x0e,0x18,0x18,0x18,0x30,0x18,0x18,0x18,0x0e,0x00},
/* | */ {0x00,0x00,0x18,0x18,0x18,0x18,0x00,0x18,0x18,0x18,0x18,0x00},
/* } */ {0x00,0x00,0x70,0x18,0x18,0x18,0x0e,0x18,0x18,0x18,0x70,0x00},
/* ~ */ {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x6e,0x3b}
};
static string (s, xp, yp)
char *s;
int *xp;
int *yp;
{
int i, j;
int c;
int mask;
int xpos = *xp;
int ypos = *yp;
int y;
int x;
y = (ypos * PIX_VERT) / y_scale;
x = (xpos * PIX_HORZ) / x_scale;
for (;*s;s++) {
c = *s;
if (c >= ' ' || c <= '~') {
for (i = 0;i < sizeof (letter_t);i++) {
mask = letters[c - ' '][i];
for (j = 7;j >= 0;j--)
if ((1 << j) & mask)
mdapoint (y + i, x + 7 - j, 0);
}
}
x += PIX_HORZ / 80;
}
}
getword ()
{
int i;
i = getchar () & 0377;
i |= ((getchar () & 0377) << 8);
return (i);
}
linemode (mode)
char *mode;
{
if (strcmp (mode, "dotted") == 0)
line = dotted;
else if (strcmp (mode, "solid") == 0)
line = solid;
else if (strcmp (mode, "longdashed") == 0)
line = longdashed;
else if (strcmp (mode, "shortdashed") == 0)
line = shortdashed;
else if (strcmp (mode, "dotdashed") == 0)
line = dotdashed;
else
line = solid;
}
draw (x, y)
{
draw2 (cur_x, cur_y, x, y);
}
draw2 (x1, y1, x2, y2)
{
int txo, txd, dx;
int tyo, tyd, dy;
int tmp;
int otx, tx, x;
int oty, ty, y;
int xs;
int ys;
txo = x1;
txd = x2;
tyo = y1;
tyd = y2;
if (txo > txd) {
tmp = txo; txo = txd; txd = tmp;
tmp = tyo; tyo = tyd; tyd = tmp;
}
dx = txd - txo;
dy = tyd - tyo;
xs = (x_scale * 2) / PIX_HORZ;
xs /= 2;
if (xs == 0)
xs = 1;
ys = y_scale / PIX_VERT;
ys /= 2;
if (ys == 0)
ys = 1;
if (dx == 0 || (dy > 0 && dy > dx) || (dy < 0 && - dy > dx)) {
if (dy > 0) { /* plot in y direction */
for (y = 0;y < dy;y += ys)
setpoint (((int) (txo + ((long) y * dx) / dy)),
y + tyo);
} else {
for (y = dy + 1;y <= 0;y += ys)
setpoint (((int) (txo + ((long) y * dx) / dy)),
y + tyo);
}
} else { /* plot in x direction */
for (x = 0;x < dx;x += xs)
setpoint (x + txo, ((int) (((long) x * dy) / dx + tyo)));
}
cur_x = x2;
cur_y = y2;
}
move (x, y)
{
cur_x = x;
cur_y = y;
}
point (x, y)
{
cur_x = x;
cur_y = y;
setpoint (x, y);
}
setpoint (x, y)
{
static int cur_point;
is_blank = 0;
if (++cur_point >= 32) /* increase spacing between dots ... */
cur_point = 0; /* ... so the line style is more ... */
if (! line[cur_point / 2]) /* ... obvious. adjust to suit ... */
return; /* ... you personal taste. */
mdapoint (y, x, 1);
}
label (s)
char *s;
{
int tx;
int ty;
short *saveline = line;
line = solid;
blank = 0;
tx = cur_x;
ty = cur_y;
string (s, &tx, &ty);
line = saveline;
}
erase ()
{
memset (scrmem, 0, 32768);
blank = 1;
}
space (ulx, uly, lrx, lry)
{
off_x = ulx;
off_y = uly;
x_scale = lrx - ulx;
y_scale = lry - uly;
}
mdapoint (y, x, scale)
int y;
int x;
int scale;
{
int page;
int line;
int column;
int bit;
int offset;
if (blank)
blank = 0;
if (scale) {
y = (y * PIX_VERT) / y_scale;
x = (x * PIX_HORZ) / x_scale;
}
if (y < 0)
y = 0;
else if (y >= PIX_VERT)
y = PIX_VERT-1;
if (x < 0)
x = 0;
else if (x >= PIX_HORZ)
x = PIX_HORZ-1;
y = (PIX_VERT-1) - y; /* invert y axis */
page = y & 03;
line = y / 4;
column = x / 8;
bit = 1 << (7 - (x & 07));
offset = (page * 8192) + line * 90 + column;
scrmem[offset] |= bit;
}
cleanup (sig)
int sig;
{
signal (sig, cleanup);
if (sig != SIGINT) {
ioctl(screenfd, MODESWITCH | savemode, 0);
exit (0);
}
}
main (argc, argv)
int argc;
char **argv;
{
int c;
char buffer[BUFSIZ];
int x1, y1;
int x2, y2;
int plots = 0;
char *file = (char *) 0;
if (argc > 1 && argv[1][0] == '-') {
if (argv[1][1] == 's' || argv[1][1] == 'S') {
PIX_HORZ = PIX_SQUARE;
file = argv[2];
} else {
fprintf (stderr, "usage: therc [ plotfile ]\n");
exit (1);
}
} else
file = argv[1];
if (file != (char *) 0) {
if (! freopen (file, "r", stdin)) {
perror (file);
exit (1);
}
}
signal (SIGINT, SIG_IGN);
signal (SIGQUIT, SIG_IGN);
signal (SIGTERM, SIG_IGN);
if ((screenfd = open("/dev/mono",1)) < 0) {
perror("/dev/mono");
exit(1);
}
if ((savemode = ioctl(screenfd, MCA_GET, 0)) < 0) {
printf("Cannot get current adapter mode\n");
close(screenfd);
exit(1);
}
if (ioctl(screenfd, SW_HGC_P0, 0) < 0) {
printf("Cannot switch modes on monitor\n");
close(screenfd);
exit(1);
}
ioctl(screenfd, MODESWITCH | savemode, 0);
ioctl(screenfd, SW_HGC_P0, 0);
if ((scrdesc = ioctl(screenfd, MAPMONO, (char *)0) ) < 0) {
ioctl(screenfd, savemode, 0);
printf("Cannot get screen descriptor to B800\n");
close(screenfd);
exit(1);
}
#ifdef M_286
scrmem = sotofar (scrdesc, 0);
#else
scrmem = (char *) scrdesc;
#endif
signal (SIGINT, cleanup);
signal (SIGQUIT, cleanup);
signal (SIGTERM, cleanup);
while ((c = getchar ()) != EOF) {
switch (c) {
case 'm':
x1 = getword ();
y1 = getword ();
move (x1, y1);
break;
case 'n':
x1 = getword ();
y1 = getword ();
draw (x1, y1);
break;
case 'p':
x1 = getword ();
y1 = getword ();
point (x1, y1);
break;
case 'l':
x1 = getword ();
y1 = getword ();
x2 = getword ();
y2 = getword ();
draw2 (x1, y1, x2, y2);
break;
case 't':
gets (buffer);
label (buffer);
break;
case 'e':
if (! blank)
pause ();
erase ();
break;
case 'f':
gets (buffer);
linemode (buffer);
break;
case 's':
x1 = getword ();
y1 = getword ();
x2 = getword ();
y2 = getword ();
space (x1, y1, x2, y2);
break;
}
}
write (2, "", 6);
pause ();
ioctl(screenfd, MODESWITCH | savemode, 0);
}
--
John F. Haugh II UUCP: ...!cs.utexas.edu!rpp386!jfh
Ma Bell: (512) 832-8832 Domain: jfh@rpp386.cactus.org