1 /* @(#)ttzapple.c 8.1 (Berkeley) 6/6/93 */
2 /* $NetBSD: ttzapple.c,v 1.9 2009/04/14 08:50:06 lukem Exp $ */
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 zz|zapple|perfect apple:\
43 :am:pt:co#80:li#24:le=^H:nd=^F:up=^K:do=^J:\
44 :ho=\E0:ll=\E1:cm=\E=%+ %+ :ch=\E<%+ :cv=\E>%+ :\
45 :cl=\E4:ce=\E2:cd=\E3:rp=\E@%.%+ :\
47 :dc=\Ec:DC=\EC%+ :ic=\Ei:IC=\EI%+ :\
48 :al=\Ea:AL=\EA%+ :dl=\Ed:DL=\ED%+ :\
49 :sf=\Ef:SF=\EF%+ :sr=\Er:SR=\ER%+ :cs=\E?%+ %+ :\
57 extern short gen_frame[];
59 /* for error correction */
63 /* for checkpointing */
66 void zz_checkpoint(void);
67 void zz_checksum(char *, int);
71 void zz_compress(int);
76 void zz_insspace(int);
77 void zz_move(int, int);
78 void zz_put_token(int, const char *, int);
81 int zz_rint(char *, int);
82 void zz_scroll_down(int);
83 void zz_scroll_up(int);
84 void zz_setmodes(int);
85 void zz_setscroll(int, int);
86 void zz_set_token(int, char *, int);
88 void zz_write(const char *, int);
94 if ((tt.tt_modes & WWM_REV) == 0)
97 if (tt.tt_modes & WWM_REV)
127 if (tt.tt_nmodes != tt.tt_modes)
128 zz_setmodes(tt.tt_nmodes);
130 if (++tt.tt_col == NCOL)
131 tt.tt_col = 0, tt.tt_row++;
135 zz_write(const char *p, int n)
137 if (tt.tt_nmodes != tt.tt_modes)
138 zz_setmodes(tt.tt_nmodes);
141 if (tt.tt_col == NCOL)
142 tt.tt_col = 0, tt.tt_row++;
146 zz_move(int row, int col)
150 if (tt.tt_row == row) {
152 if ((x = col - tt.tt_col) == 0)
170 if ((col & 7) == 0 && x > 0 && x <= 16) {
180 if (tt.tt_col == col) {
181 switch (row - tt.tt_row) {
209 if (row == tt.tt_row + 1) {
211 * Do newline first to match the sequence
212 * for scroll down and return
218 if (row == NROW - 1) {
224 /* favor local motion for better compression */
225 if (row == tt.tt_row + 1) {
229 if (row == tt.tt_row - 1) {
245 ttputc(TOKEN_MAX + ' ');
253 zz_setscroll(0, NROW - 1);
261 zz_setscroll(0, NROW - 1);
262 tt.tt_modes = WWM_REV;
264 tt.tt_col = tt.tt_row = -10;
293 tt.tt_col = tt.tt_row = 0;
319 zz_scroll_down(int n)
322 if (tt.tt_row == NROW - 1)
344 zz_setscroll(int top, int bot)
349 tt.tt_scroll_top = top;
350 tt.tt_scroll_bot = bot;
356 zz_set_token(int t, char *s, int n)
358 if (tt.tt_nmodes != tt.tt_modes)
359 zz_setmodes(tt.tt_nmodes);
362 zz_setmodes(WWM_REV);
363 (void) sprintf(buf, "%02x=", t);
375 zz_put_token(int t, const char *s __unused, int n __unused)
377 if (tt.tt_nmodes != tt.tt_modes)
378 zz_setmodes(tt.tt_nmodes);
381 zz_setmodes(WWM_REV);
382 (void) sprintf(buf, "%02x>", t);
390 zz_rint(char *p, int n)
397 for (i = n, q = p; --i >= 0;) {
398 int c = (unsigned char) *p++;
406 case 1: /* start input ecc */
411 case 2: /* ack checkpoint */
416 case 3: /* nack checkpoint */
425 } else if (zz_ecc == 1) {
433 } else if (zz_lastc == c) {
446 zz_checksum(char *p, int n)
451 zz_sum = c << 1 | (c >> 11 & 1);
456 zz_compress(int flag)
461 tt.tt_checksum = zz_checksum;
467 static char x[] = { ctrl('['), 'V', 0, 0 };
469 zz_checksum(x, sizeof x);
471 ttputc(' ' + (zz_sum & 0x3f));
472 ttputc(' ' + (zz_sum >> 6 & 0x3f));
480 tt.tt_insspace = zz_insspace;
481 tt.tt_delchar = zz_delchar;
482 tt.tt_insline = zz_insline;
483 tt.tt_delline = zz_delline;
484 tt.tt_clreol = zz_clreol;
485 tt.tt_clreos = zz_clreos;
486 tt.tt_scroll_down = zz_scroll_down;
487 tt.tt_scroll_up = zz_scroll_up;
488 tt.tt_setscroll = zz_setscroll;
489 tt.tt_availmodes = WWM_REV;
494 tt.tt_start = zz_start;
495 tt.tt_reset = zz_reset;
497 tt.tt_write = zz_write;
498 tt.tt_putc = zz_putc;
499 tt.tt_move = zz_move;
500 tt.tt_clear = zz_clear;
501 tt.tt_setmodes = zz_setmodes;
502 tt.tt_frame = gen_frame;
503 tt.tt_padc = TT_PADC_NONE;
505 tt.tt_set_token = zz_set_token;
506 tt.tt_put_token = zz_put_token;
508 tt.tt_token_max = TOKEN_MAX;
509 tt.tt_set_token_cost = 2;
510 tt.tt_put_token_cost = 1;
511 tt.tt_compress = zz_compress;
512 tt.tt_checksum = zz_checksum;
513 tt.tt_checkpoint = zz_checkpoint;
514 tt.tt_reset = zz_reset;
515 tt.tt_rint = zz_rint;