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mirror of https://git.FreeBSD.org/src.git synced 2024-12-24 11:29:10 +00:00
freebsd/usr.bin/window/ttzapple.c
1994-05-27 12:33:43 +00:00

484 lines
8.5 KiB
C

/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)ttzapple.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include "ww.h"
#include "tt.h"
#include "char.h"
/*
zz|zapple|perfect apple:\
:am:pt:co#80:li#24:le=^H:nd=^F:up=^K:do=^J:\
:ho=\E0:ll=\E1:cm=\E=%+ %+ :ch=\E<%+ :cv=\E>%+ :\
:cl=\E4:ce=\E2:cd=\E3:rp=\E@%.%+ :\
:so=\E+:se=\E-:\
:dc=\Ec:DC=\EC%+ :ic=\Ei:IC=\EI%+ :\
:al=\Ea:AL=\EA%+ :dl=\Ed:DL=\ED%+ :\
:sf=\Ef:SF=\EF%+ :sr=\Er:SR=\ER%+ :cs=\E?%+ %+ :\
:is=\E-\ET :
*/
#define NCOL 80
#define NROW 24
#define TOKEN_MAX 32
extern short gen_frame[];
/* for error correction */
int zz_ecc;
int zz_lastc;
/* for checkpointing */
int zz_sum;
zz_setmodes(new)
{
if (new & WWM_REV) {
if ((tt.tt_modes & WWM_REV) == 0)
ttesc('+');
} else
if (tt.tt_modes & WWM_REV)
ttesc('-');
tt.tt_modes = new;
}
zz_insline(n)
{
if (n == 1)
ttesc('a');
else {
ttesc('A');
ttputc(n + ' ');
}
}
zz_delline(n)
{
if (n == 1)
ttesc('d');
else {
ttesc('D');
ttputc(n + ' ');
}
}
zz_putc(c)
char c;
{
if (tt.tt_nmodes != tt.tt_modes)
zz_setmodes(tt.tt_nmodes);
ttputc(c);
if (++tt.tt_col == NCOL)
tt.tt_col = 0, tt.tt_row++;
}
zz_write(p, n)
register char *p;
register n;
{
if (tt.tt_nmodes != tt.tt_modes)
zz_setmodes(tt.tt_nmodes);
ttwrite(p, n);
tt.tt_col += n;
if (tt.tt_col == NCOL)
tt.tt_col = 0, tt.tt_row++;
}
zz_move(row, col)
register row, col;
{
register x;
if (tt.tt_row == row) {
same_row:
if ((x = col - tt.tt_col) == 0)
return;
if (col == 0) {
ttctrl('m');
goto out;
}
switch (x) {
case 2:
ttctrl('f');
case 1:
ttctrl('f');
goto out;
case -2:
ttctrl('h');
case -1:
ttctrl('h');
goto out;
}
if ((col & 7) == 0 && x > 0 && x <= 16) {
ttctrl('i');
if (x > 8)
ttctrl('i');
goto out;
}
ttesc('<');
ttputc(col + ' ');
goto out;
}
if (tt.tt_col == col) {
switch (row - tt.tt_row) {
case 2:
ttctrl('j');
case 1:
ttctrl('j');
goto out;
case -2:
ttctrl('k');
case -1:
ttctrl('k');
goto out;
}
if (col == 0) {
if (row == 0)
goto home;
if (row == NROW - 1)
goto ll;
}
ttesc('>');
ttputc(row + ' ');
goto out;
}
if (col == 0) {
if (row == 0) {
home:
ttesc('0');
goto out;
}
if (row == tt.tt_row + 1) {
/*
* Do newline first to match the sequence
* for scroll down and return
*/
ttctrl('j');
ttctrl('m');
goto out;
}
if (row == NROW - 1) {
ll:
ttesc('1');
goto out;
}
}
/* favor local motion for better compression */
if (row == tt.tt_row + 1) {
ttctrl('j');
goto same_row;
}
if (row == tt.tt_row - 1) {
ttctrl('k');
goto same_row;
}
ttesc('=');
ttputc(' ' + row);
ttputc(' ' + col);
out:
tt.tt_col = col;
tt.tt_row = row;
}
zz_start()
{
ttesc('T');
ttputc(TOKEN_MAX + ' ');
ttesc('U');
ttputc('!');
zz_ecc = 1;
zz_lastc = -1;
ttesc('v');
ttflush();
zz_sum = 0;
zz_setscroll(0, NROW - 1);
zz_clear();
zz_setmodes(0);
}
zz_reset()
{
zz_setscroll(0, NROW - 1);
tt.tt_modes = WWM_REV;
zz_setmodes(0);
tt.tt_col = tt.tt_row = -10;
}
zz_end()
{
ttesc('T');
ttputc(' ');
ttesc('U');
ttputc(' ');
zz_ecc = 0;
}
zz_clreol()
{
ttesc('2');
}
zz_clreos()
{
ttesc('3');
}
zz_clear()
{
ttesc('4');
tt.tt_col = tt.tt_row = 0;
}
zz_insspace(n)
{
if (n == 1)
ttesc('i');
else {
ttesc('I');
ttputc(n + ' ');
}
}
zz_delchar(n)
{
if (n == 1)
ttesc('c');
else {
ttesc('C');
ttputc(n + ' ');
}
}
zz_scroll_down(n)
{
if (n == 1)
if (tt.tt_row == NROW - 1)
ttctrl('j');
else
ttesc('f');
else {
ttesc('F');
ttputc(n + ' ');
}
}
zz_scroll_up(n)
{
if (n == 1)
ttesc('r');
else {
ttesc('R');
ttputc(n + ' ');
}
}
zz_setscroll(top, bot)
{
ttesc('?');
ttputc(top + ' ');
ttputc(bot + ' ');
tt.tt_scroll_top = top;
tt.tt_scroll_bot = bot;
}
int zz_debug = 0;
zz_set_token(t, s, n)
char *s;
{
if (tt.tt_nmodes != tt.tt_modes)
zz_setmodes(tt.tt_nmodes);
if (zz_debug) {
char buf[100];
zz_setmodes(WWM_REV);
(void) sprintf(buf, "%02x=", t);
ttputs(buf);
tt.tt_col += 3;
}
ttputc(0x80);
ttputc(t + 1);
s[n - 1] |= 0x80;
ttwrite(s, n);
s[n - 1] &= ~0x80;
}
/*ARGSUSED*/
zz_put_token(t, s, n)
char *s;
{
if (tt.tt_nmodes != tt.tt_modes)
zz_setmodes(tt.tt_nmodes);
if (zz_debug) {
char buf[100];
zz_setmodes(WWM_REV);
(void) sprintf(buf, "%02x>", t);
ttputs(buf);
tt.tt_col += 3;
}
ttputc(t + 0x81);
}
zz_rint(p, n)
char *p;
{
register i;
register char *q;
if (!zz_ecc)
return n;
for (i = n, q = p; --i >= 0;) {
register c = (unsigned char) *p++;
if (zz_lastc == 0) {
switch (c) {
case 0:
*q++ = 0;
zz_lastc = -1;
break;
case 1: /* start input ecc */
zz_ecc = 2;
zz_lastc = -1;
wwnreadstat++;
break;
case 2: /* ack checkpoint */
tt.tt_ack = 1;
zz_lastc = -1;
wwnreadack++;
break;
case 3: /* nack checkpoint */
tt.tt_ack = -1;
zz_lastc = -1;
wwnreadnack++;
break;
default:
zz_lastc = c;
wwnreadec++;
}
} else if (zz_ecc == 1) {
if (c)
*q++ = c;
else
zz_lastc = 0;
} else {
if (zz_lastc < 0) {
zz_lastc = c;
} else if (zz_lastc == c) {
*q++ = zz_lastc;
zz_lastc = -1;
} else {
wwnreadec++;
zz_lastc = c;
}
}
}
return q - (p - n);
}
zz_checksum(p, n)
register char *p;
register n;
{
while (--n >= 0) {
register c = *p++ & 0x7f;
c ^= zz_sum;
zz_sum = c << 1 | c >> 11 & 1;
}
}
zz_compress(flag)
{
if (flag)
tt.tt_checksum = 0;
else
tt.tt_checksum = zz_checksum;
}
zz_checkpoint()
{
static char x[] = { ctrl('['), 'V', 0, 0 };
zz_checksum(x, sizeof x);
ttesc('V');
ttputc(' ' + (zz_sum & 0x3f));
ttputc(' ' + (zz_sum >> 6 & 0x3f));
ttflush();
zz_sum = 0;
}
tt_zapple()
{
tt.tt_insspace = zz_insspace;
tt.tt_delchar = zz_delchar;
tt.tt_insline = zz_insline;
tt.tt_delline = zz_delline;
tt.tt_clreol = zz_clreol;
tt.tt_clreos = zz_clreos;
tt.tt_scroll_down = zz_scroll_down;
tt.tt_scroll_up = zz_scroll_up;
tt.tt_setscroll = zz_setscroll;
tt.tt_availmodes = WWM_REV;
tt.tt_wrap = 1;
tt.tt_retain = 0;
tt.tt_ncol = NCOL;
tt.tt_nrow = NROW;
tt.tt_start = zz_start;
tt.tt_reset = zz_reset;
tt.tt_end = zz_end;
tt.tt_write = zz_write;
tt.tt_putc = zz_putc;
tt.tt_move = zz_move;
tt.tt_clear = zz_clear;
tt.tt_setmodes = zz_setmodes;
tt.tt_frame = gen_frame;
tt.tt_padc = TT_PADC_NONE;
tt.tt_ntoken = 127;
tt.tt_set_token = zz_set_token;
tt.tt_put_token = zz_put_token;
tt.tt_token_min = 1;
tt.tt_token_max = TOKEN_MAX;
tt.tt_set_token_cost = 2;
tt.tt_put_token_cost = 1;
tt.tt_compress = zz_compress;
tt.tt_checksum = zz_checksum;
tt.tt_checkpoint = zz_checkpoint;
tt.tt_reset = zz_reset;
tt.tt_rint = zz_rint;
return 0;
}