usr.bin/window/ttzapple.c

   1 /*      $NetBSD: ttzapple.c,v 1.8 2006/12/18 20:04:55 christos Exp $    */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Edward Wang at The University of California, Berkeley.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)ttzapple.c  8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: ttzapple.c,v 1.8 2006/12/18 20:04:55 christos Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <stdio.h>
  45 #include "ww.h"
  46 #include "tt.h"
  47 #include "char.h"
  48
  49 /*
  50 zz|zapple|perfect apple:\
  51         :am:pt:co#80:li#24:le=^H:nd=^F:up=^K:do=^J:\
  52         :ho=\E0:ll=\E1:cm=\E=%+ %+ :ch=\E<%+ :cv=\E>%+ :\
  53         :cl=\E4:ce=\E2:cd=\E3:rp=\E@%.%+ :\
  54         :so=\E+:se=\E-:\
  55         :dc=\Ec:DC=\EC%+ :ic=\Ei:IC=\EI%+ :\
  56         :al=\Ea:AL=\EA%+ :dl=\Ed:DL=\ED%+ :\
  57         :sf=\Ef:SF=\EF%+ :sr=\Er:SR=\ER%+ :cs=\E?%+ %+ :\
  58         :is=\E-\ET :
  59 */
  60
  61 #define NCOL            80
  62 #define NROW            24
  63 #define TOKEN_MAX       32
  64
  65 extern short gen_frame[];
  66
  67         /* for error correction */
  68 int zz_ecc;
  69 int zz_lastc;
  70
  71         /* for checkpointing */
  72 int zz_sum;
  73
  74 void    zz_checkpoint(void);
  75 void    zz_checksum(char *, int);
  76 void    zz_clear(void);
  77 void    zz_clreol(void);
  78 void    zz_clreos(void);
  79 void    zz_compress(int);
  80 void    zz_delchar(int);
  81 void    zz_delline(int);
  82 void    zz_end(void);
  83 void    zz_insline(int);
  84 void    zz_insspace(int);
  85 void    zz_move(int, int);
  86 void    zz_put_token(int, const char *, int);
  87 void    zz_putc(char);
  88 void    zz_reset(void);
  89 int     zz_rint(char *, int);
  90 void    zz_scroll_down(int);
  91 void    zz_scroll_up(int);
  92 void    zz_setmodes(int);
  93 void    zz_setscroll(int, int);
  94 void    zz_set_token(int, char *, int);
  95 void    zz_start(void);
  96 void    zz_write(const char *, int);
  97
  98 void
  99 zz_setmodes(int new)
 100 {
 101         if (new & WWM_REV) {
 102                 if ((tt.tt_modes & WWM_REV) == 0)
 103                         ttesc('+');
 104         } else
 105                 if (tt.tt_modes & WWM_REV)
 106                         ttesc('-');
 107         tt.tt_modes = new;
 108 }
 109
 110 void
 111 zz_insline(int n)
 112 {
 113         if (n == 1)
 114                 ttesc('a');
 115         else {
 116                 ttesc('A');
 117                 ttputc(n + ' ');
 118         }
 119 }
 120
 121 void
 122 zz_delline(int n)
 123 {
 124         if (n == 1)
 125                 ttesc('d');
 126         else {
 127                 ttesc('D');
 128                 ttputc(n + ' ');
 129         }
 130 }
 131
 132 void
 133 zz_putc(char c)
 134 {
 135         if (tt.tt_nmodes != tt.tt_modes)
 136                 zz_setmodes(tt.tt_nmodes);
 137         ttputc(c);
 138         if (++tt.tt_col == NCOL)
 139                 tt.tt_col = 0, tt.tt_row++;
 140 }
 141
 142 void
 143 zz_write(const char *p, int n)
 144 {
 145         if (tt.tt_nmodes != tt.tt_modes)
 146                 zz_setmodes(tt.tt_nmodes);
 147         ttwrite(p, n);
 148         tt.tt_col += n;
 149         if (tt.tt_col == NCOL)
 150                 tt.tt_col = 0, tt.tt_row++;
 151 }
 152
 153 void
 154 zz_move(int row, int col)
 155 {
 156         int x;
 157
 158         if (tt.tt_row == row) {
 159 same_row:
 160                 if ((x = col - tt.tt_col) == 0)
 161                         return;
 162                 if (col == 0) {
 163                         ttctrl('m');
 164                         goto out;
 165                 }
 166                 switch (x) {
 167                 case 2:
 168                         ttctrl('f');
 169                 case 1:
 170                         ttctrl('f');
 171                         goto out;
 172                 case -2:
 173                         ttctrl('h');
 174                 case -1:
 175                         ttctrl('h');
 176                         goto out;
 177                 }
 178                 if ((col & 7) == 0 && x > 0 && x <= 16) {
 179                         ttctrl('i');
 180                         if (x > 8)
 181                                 ttctrl('i');
 182                         goto out;
 183                 }
 184                 ttesc('<');
 185                 ttputc(col + ' ');
 186                 goto out;
 187         }
 188         if (tt.tt_col == col) {
 189                 switch (row - tt.tt_row) {
 190                 case 2:
 191                         ttctrl('j');
 192                 case 1:
 193                         ttctrl('j');
 194                         goto out;
 195                 case -2:
 196                         ttctrl('k');
 197                 case -1:
 198                         ttctrl('k');
 199                         goto out;
 200                 }
 201                 if (col == 0) {
 202                         if (row == 0)
 203                                 goto home;
 204                         if (row == NROW - 1)
 205                                 goto ll;
 206                 }
 207                 ttesc('>');
 208                 ttputc(row + ' ');
 209                 goto out;
 210         }
 211         if (col == 0) {
 212                 if (row == 0) {
 213 home:
 214                         ttesc('0');
 215                         goto out;
 216                 }
 217                 if (row == tt.tt_row + 1) {
 218                         /*
 219                          * Do newline first to match the sequence
 220                          * for scroll down and return
 221                          */
 222                         ttctrl('j');
 223                         ttctrl('m');
 224                         goto out;
 225                 }
 226                 if (row == NROW - 1) {
 227 ll:
 228                         ttesc('1');
 229                         goto out;
 230                 }
 231         }
 232         /* favor local motion for better compression */
 233         if (row == tt.tt_row + 1) {
 234                 ttctrl('j');
 235                 goto same_row;
 236         }
 237         if (row == tt.tt_row - 1) {
 238                 ttctrl('k');
 239                 goto same_row;
 240         }
 241         ttesc('=');
 242         ttputc(' ' + row);
 243         ttputc(' ' + col);
 244 out:
 245         tt.tt_col = col;
 246         tt.tt_row = row;
 247 }
 248
 249 void
 250 zz_start(void)
 251 {
 252         ttesc('T');
 253         ttputc(TOKEN_MAX + ' ');
 254         ttesc('U');
 255         ttputc('!');
 256         zz_ecc = 1;
 257         zz_lastc = -1;
 258         ttesc('v');
 259         ttflush();
 260         zz_sum = 0;
 261         zz_setscroll(0, NROW - 1);
 262         zz_clear();
 263         zz_setmodes(0);
 264 }
 265
 266 void
 267 zz_reset(void)
 268 {
 269         zz_setscroll(0, NROW - 1);
 270         tt.tt_modes = WWM_REV;
 271         zz_setmodes(0);
 272         tt.tt_col = tt.tt_row = -10;
 273 }
 274
 275 void
 276 zz_end(void)
 277 {
 278         ttesc('T');
 279         ttputc(' ');
 280         ttesc('U');
 281         ttputc(' ');
 282         zz_ecc = 0;
 283 }
 284
 285 void
 286 zz_clreol(void)
 287 {
 288         ttesc('2');
 289 }
 290
 291 void
 292 zz_clreos(void)
 293 {
 294         ttesc('3');
 295 }
 296
 297 void
 298 zz_clear(void)
 299 {
 300         ttesc('4');
 301         tt.tt_col = tt.tt_row = 0;
 302 }
 303
 304 void
 305 zz_insspace(int n)
 306 {
 307         if (n == 1)
 308                 ttesc('i');
 309         else {
 310                 ttesc('I');
 311                 ttputc(n + ' ');
 312         }
 313 }
 314
 315 void
 316 zz_delchar(int n)
 317 {
 318         if (n == 1)
 319                 ttesc('c');
 320         else {
 321                 ttesc('C');
 322                 ttputc(n + ' ');
 323         }
 324 }
 325
 326 void
 327 zz_scroll_down(int n)
 328 {
 329         if (n == 1) {
 330                 if (tt.tt_row == NROW - 1)
 331                         ttctrl('j');
 332                 else
 333                         ttesc('f');
 334         } else {
 335                 ttesc('F');
 336                 ttputc(n + ' ');
 337         }
 338 }
 339
 340 void
 341 zz_scroll_up(int n)
 342 {
 343         if (n == 1)
 344                 ttesc('r');
 345         else {
 346                 ttesc('R');
 347                 ttputc(n + ' ');
 348         }
 349 }
 350
 351 void
 352 zz_setscroll(int top, int bot)
 353 {
 354         ttesc('?');
 355         ttputc(top + ' ');
 356         ttputc(bot + ' ');
 357         tt.tt_scroll_top = top;
 358         tt.tt_scroll_bot = bot;
 359 }
 360
 361 int zz_debug = 0;
 362
 363 void
 364 zz_set_token(int t, char *s, int n)
 365 {
 366         if (tt.tt_nmodes != tt.tt_modes)
 367                 zz_setmodes(tt.tt_nmodes);
 368         if (zz_debug) {
 369                 char buf[100];
 370                 zz_setmodes(WWM_REV);
 371                 (void) sprintf(buf, "%02x=", t);
 372                 ttputs(buf);
 373                 tt.tt_col += 3;
 374         }
 375         ttputc(0x80);
 376         ttputc(t + 1);
 377         s[n - 1] |= 0x80;
 378         ttwrite(s, n);
 379         s[n - 1] &= ~0x80;
 380 }
 381
 382 void
 383 zz_put_token(int t, const char *s __unused, int n __unused)
 384 {
 385         if (tt.tt_nmodes != tt.tt_modes)
 386                 zz_setmodes(tt.tt_nmodes);
 387         if (zz_debug) {
 388                 char buf[100];
 389                 zz_setmodes(WWM_REV);
 390                 (void) sprintf(buf, "%02x>", t);
 391                 ttputs(buf);
 392                 tt.tt_col += 3;
 393         }
 394         ttputc(t + 0x81);
 395 }
 396
 397 int
 398 zz_rint(char *p, int n)
 399 {
 400         int i;
 401         char *q;
 402
 403         if (!zz_ecc)
 404                 return n;
 405         for (i = n, q = p; --i >= 0;) {
 406                 int c = (unsigned char) *p++;
 407
 408                 if (zz_lastc == 0) {
 409                         switch (c) {
 410                         case 0:
 411                                 *q++ = 0;
 412                                 zz_lastc = -1;
 413                                 break;
 414                         case 1:         /* start input ecc */
 415                                 zz_ecc = 2;
 416                                 zz_lastc = -1;
 417                                 wwnreadstat++;
 418                                 break;
 419                         case 2:         /* ack checkpoint */
 420                                 tt.tt_ack = 1;
 421                                 zz_lastc = -1;
 422                                 wwnreadack++;
 423                                 break;
 424                         case 3:         /* nack checkpoint */
 425                                 tt.tt_ack = -1;
 426                                 zz_lastc = -1;
 427                                 wwnreadnack++;
 428                                 break;
 429                         default:
 430                                 zz_lastc = c;
 431                                 wwnreadec++;
 432                         }
 433                 } else if (zz_ecc == 1) {
 434                         if (c)
 435                                 *q++ = c;
 436                         else
 437                                 zz_lastc = 0;
 438                 } else {
 439                         if (zz_lastc < 0) {
 440                                 zz_lastc = c;
 441                         } else if (zz_lastc == c) {
 442                                 *q++ = zz_lastc;
 443                                 zz_lastc = -1;
 444                         } else {
 445                                 wwnreadec++;
 446                                 zz_lastc = c;
 447                         }
 448                 }
 449         }
 450         return q - (p - n);
 451 }
 452
 453 void
 454 zz_checksum(char *p, int n)
 455 {
 456         while (--n >= 0) {
 457                 int c = *p++ & 0x7f;
 458                 c ^= zz_sum;
 459                 zz_sum = c << 1 | (c >> 11 & 1);
 460         }
 461 }
 462
 463 void
 464 zz_compress(int flag)
 465 {
 466         if (flag)
 467                 tt.tt_checksum = 0;
 468         else
 469                 tt.tt_checksum = zz_checksum;
 470 }
 471
 472 void
 473 zz_checkpoint(void)
 474 {
 475         static char x[] = { ctrl('['), 'V', 0, 0 };
 476
 477         zz_checksum(x, sizeof x);
 478         ttesc('V');
 479         ttputc(' ' + (zz_sum & 0x3f));
 480         ttputc(' ' + (zz_sum >> 6 & 0x3f));
 481         ttflush();
 482         zz_sum = 0;
 483 }
 484
 485 int
 486 tt_zapple(void)
 487 {
 488         tt.tt_insspace = zz_insspace;
 489         tt.tt_delchar = zz_delchar;
 490         tt.tt_insline = zz_insline;
 491         tt.tt_delline = zz_delline;
 492         tt.tt_clreol = zz_clreol;
 493         tt.tt_clreos = zz_clreos;
 494         tt.tt_scroll_down = zz_scroll_down;
 495         tt.tt_scroll_up = zz_scroll_up;
 496         tt.tt_setscroll = zz_setscroll;
 497         tt.tt_availmodes = WWM_REV;
 498         tt.tt_wrap = 1;
 499         tt.tt_retain = 0;
 500         tt.tt_ncol = NCOL;
 501         tt.tt_nrow = NROW;
 502         tt.tt_start = zz_start;
 503         tt.tt_reset = zz_reset;
 504         tt.tt_end = zz_end;
 505         tt.tt_write = zz_write;
 506         tt.tt_putc = zz_putc;
 507         tt.tt_move = zz_move;
 508         tt.tt_clear = zz_clear;
 509         tt.tt_setmodes = zz_setmodes;
 510         tt.tt_frame = gen_frame;
 511         tt.tt_padc = TT_PADC_NONE;
 512         tt.tt_ntoken = 127;
 513         tt.tt_set_token = zz_set_token;
 514         tt.tt_put_token = zz_put_token;
 515         tt.tt_token_min = 1;
 516         tt.tt_token_max = TOKEN_MAX;
 517         tt.tt_set_token_cost = 2;
 518         tt.tt_put_token_cost = 1;
 519         tt.tt_compress = zz_compress;
 520         tt.tt_checksum = zz_checksum;
 521         tt.tt_checkpoint = zz_checkpoint;
 522         tt.tt_reset = zz_reset;
 523         tt.tt_rint = zz_rint;
 524         return 0;
 525 }