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1283 mateusz.vi 1 
/* Sved, the SvarDOS editor
2 
 *
3 
 * Copyright (C) 2023 Mateusz Viste
4 
 *
5 
 * Sved is released under the terms of the MIT license.
6 
 *
7 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 
 * of this software and associated documentation files (the "Software"), to
9 
 * deal in the Software without restriction, including without limitation the
10 
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
11 
 * sell copies of the Software, and to permit persons to whom the Software is
12 
 * furnished to do so, subject to the following conditions:
13 
 *
14 
 * The above copyright notice and this permission notice shall be included in
15 
 * all copies or substantial portions of the Software.
16 
 *
17 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
23 
 * IN THE SOFTWARE.
24 
 */
1275 mateusz.vi 25 
 
1338 mateusz.vi 26 
#include <dos.h>      /* _dos_open(), _dos_read(), _dos_close(), ... */
27 
#include <fcntl.h>    /* O_RDONLY, O_WRONLY */
1275 mateusz.vi 28 
#include <string.h>
29 
 
1312 mateusz.vi 30 
#include "mdr\bios.h"
1275 mateusz.vi 31 
#include "mdr\cout.h"
1307 mateusz.vi 32 
#include "mdr\dos.h"
1275 mateusz.vi 33 
#include "mdr\keyb.h"
34 
 
1282 mateusz.vi 35 
#include "svarlang\svarlang.h"
36 
 
1326 mateusz.vi 37 
 
38 
/*****************************************************************************
39 
 * global variables and definitions                                          *
40 
 *****************************************************************************/
41 
 
1275 mateusz.vi 42 
/* preload the mono scheme (to be overloaded at runtime if color adapter present) */
1333 mateusz.vi 43 
static unsigned char SCHEME_TEXT   = 0x07,
44 
                     SCHEME_STBAR1 = 0x70,
45 
                     SCHEME_STBAR2 = 0x70,
46 
                     SCHEME_STBAR3 = 0xf0,
47 
                     SCHEME_SCROLL = 0x70,
48 
                     SCHEME_MSG    = 0x70,
49 
                     SCHEME_ERR    = 0xf0;
1327 mateusz.vi 50 
 
1326 mateusz.vi 51 
static unsigned char screenw, screenh;
1275 mateusz.vi 52 
 
1327 mateusz.vi 53 
static struct {
54 
    unsigned char from;
55 
    unsigned char to;
1342 mateusz.vi 56 
    unsigned char statusbar;
57 
} uidirty = {0, 0xff, 1}; /* make sure to redraw entire UI at first run */
1327 mateusz.vi 58 
 
1275 mateusz.vi 59 
#define SCROLL_CURSOR 0xB1
60 
 
61 
struct line {
1288 mateusz.vi 62 
  struct line far *prev;
63 
  struct line far *next;
1275 mateusz.vi 64 
  unsigned short len;
65 
  char payload[1];
66 
};
67 
 
1315 mateusz.vi 68 
struct file {
1288 mateusz.vi 69 
  struct line far *cursor;
1275 mateusz.vi 70 
  unsigned short xoffset;
1348 mateusz.vi 71 
  unsigned short cursorposx;
72 
  unsigned short cursorposy;
1328 mateusz.vi 73 
  unsigned short totlines;
74 
  unsigned short curline;
1330 mateusz.vi 75 
  char lfonly;   /* set if line endings are LF (CR/LF otherwise) */
76 
  char modflag;  /* non-zero if file has been modified since last save */
1332 mateusz.vi 77 
  char fname[128];
1275 mateusz.vi 78 
};
79 
 
80 
 
1326 mateusz.vi 81 
/*****************************************************************************
82 
 * functions                                                                 *
83 
 *****************************************************************************/
84 
 
1339 mateusz.vi 85 
static struct line far *line_calloc(unsigned short siz) {
1342 mateusz.vi 86 
  struct line far *res;
1339 mateusz.vi 87 
  unsigned int seg;
1341 mateusz.vi 88 
  if (_dos_allocmem((sizeof(struct line) + siz + 15) / 16, &seg) != 0) return(NULL);
1342 mateusz.vi 89 
  res = MK_FP(seg, 0);
90 
  _fmemset(res, 0, sizeof(struct line) + siz);
1339 mateusz.vi 91 
  return(MK_FP(seg, 0));
92 
}
93 
 
94 
 
95 
static void line_free(struct line far *ptr) {
96 
  _dos_freemem(FP_SEG(ptr));
97 
}
98 
 
99 
 
1348 mateusz.vi 100 
static int curline_resize(struct file far *db, unsigned short newsiz) {
1339 mateusz.vi 101 
  unsigned int maxavail;
102 
  struct line far *newptr;
103 
 
1341 mateusz.vi 104 
  /* try resizing the block (much faster) */
105 
  if (_dos_setblock((sizeof(struct line) + newsiz + 15) / 16, FP_SEG(db->cursor), &maxavail) == 0) return(0);
1339 mateusz.vi 106 
 
107 
  /* create a new block and copy data over */
108 
  newptr = line_calloc(newsiz);
1340 mateusz.vi 109 
  if (newptr == NULL) return(-1);
110 
  _fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);
111 
 
112 
  /* rewire the linked list */
113 
  db->cursor = newptr;
114 
  if (newptr->next) newptr->next->prev = newptr;
115 
  if (newptr->prev) newptr->prev->next = newptr;
116 
 
117 
  return(0);
1339 mateusz.vi 118 
}
119 
 
120 
 
1328 mateusz.vi 121 
/* adds a new line at cursor position into file linked list and advance cursor
1324 mateusz.vi 122 
 * returns non-zero on error */
1328 mateusz.vi 123 
static int line_add(struct file *db, const char far *line, unsigned short slen) {
1288 mateusz.vi 124 
  struct line far *l;
1275 mateusz.vi 125 
 
1339 mateusz.vi 126 
  l = line_calloc(slen);
1287 mateusz.vi 127 
  if (l == NULL) return(-1);
128 
 
1275 mateusz.vi 129 
  l->prev = db->cursor;
130 
  if (db->cursor) {
131 
    l->next = db->cursor->next;
132 
    db->cursor->next = l;
133 
    l->next->prev = l;
134 
  }
135 
  db->cursor = l;
1342 mateusz.vi 136 
  if (slen > 0) {
137 
    _fmemmove(l->payload, line, slen);
138 
    l->len = slen;
139 
  }
1287 mateusz.vi 140 
 
1328 mateusz.vi 141 
  db->totlines += 1;
142 
  db->curline += 1;
143 
 
1287 mateusz.vi 144 
  return(0);
1275 mateusz.vi 145 
}
146 
 
147 
 
1348 mateusz.vi 148 
static void ui_getstring(const char *query, char *s, unsigned short maxlen) {
149 
  unsigned short len = 0;
150 
  unsigned char y, x;
1332 mateusz.vi 151 
  int k;
152 
 
153 
  if (maxlen == 0) return;
154 
  maxlen--; /* make room for the nul terminator */
155 
 
156 
  y = screenh - 1;
157 
 
158 
  /* print query string */
1333 mateusz.vi 159 
  x = mdr_cout_str(y, 0, query, SCHEME_STBAR3, 40);
160 
  mdr_cout_char_rep(y, x++, ' ', SCHEME_STBAR3, screenw - x);
1332 mateusz.vi 161 
 
162 
  for (;;) {
163 
    mdr_cout_locate(y, x + len);
164 
    k = keyb_getkey();
165 
 
1345 mateusz.vi 166 
    switch (k) {
167 
      case 0x1b: /* ESC */
168 
        s[0] = 0;
169 
        return;
170 
      case '\r':
171 
        s[len] = 0;
172 
        return;
173 
      case 0x08: /* BKSPC */
174 
        if (len > 0) {
175 
          len--;
176 
          mdr_cout_char(y, x + len, ' ', SCHEME_STBAR3);
177 
        }
178 
        break;
179 
      default:
180 
        if ((k <= 0xff) && (k >= ' ') && (len < maxlen)) {
181 
          mdr_cout_char(y, x + len, k, SCHEME_STBAR3);
182 
          s[len++] = k;
183 
        }
1332 mateusz.vi 184 
    }
1345 mateusz.vi 185 
  }
1332 mateusz.vi 186 
 
187 
}
188 
 
189 
 
1324 mateusz.vi 190 
/* append a nul-terminated string to line at cursor position */
191 
static int line_append(struct file *f, const char far *buf, unsigned short len) {
192 
  if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */
1340 mateusz.vi 193 
  if (curline_resize(f, f->cursor->len + len) != 0) return(-1);
1337 mateusz.vi 194 
  _fmemmove(f->cursor->payload + f->cursor->len, buf, len);
1324 mateusz.vi 195 
  f->cursor->len += len;
196 
 
197 
  return(0);
198 
}
199 
 
200 
 
1315 mateusz.vi 201 
static void db_rewind(struct file *db) {
1275 mateusz.vi 202 
  if (db->cursor == NULL) return;
203 
  while (db->cursor->prev) db->cursor = db->cursor->prev;
1328 mateusz.vi 204 
  db->curline = 0;
1275 mateusz.vi 205 
}
206 
 
207 
 
1326 mateusz.vi 208 
static void ui_basic(const struct file *db) {
1302 mateusz.vi 209 
  const char *s = svarlang_strid(0); /* HELP */
1348 mateusz.vi 210 
  unsigned short helpcol = screenw - strlen(s);
1275 mateusz.vi 211 
 
1330 mateusz.vi 212 
  /* fill status bar with background (without modflag as it is refreshed by ui_refresh) */
1333 mateusz.vi 213 
  mdr_cout_char_rep(screenh - 1, 1, ' ', SCHEME_STBAR1, screenw - 1);
1313 mateusz.vi 214 
 
215 
  /* filename */
1330 mateusz.vi 216 
  {
217 
    const char *fn = db->fname;
218 
    if (*fn == 0) fn = svarlang_str(0, 1);
1333 mateusz.vi 219 
    mdr_cout_str(screenh - 1, 1, fn, SCHEME_STBAR1, screenw);
1321 mateusz.vi 220 
  }
1313 mateusz.vi 221 
 
222 
  /* eol type */
1330 mateusz.vi 223 
  {
224 
    const char *eoltype = "CRLF";
225 
    if (db->lfonly) eoltype = "LF";
1335 mateusz.vi 226 
    mdr_cout_str(screenh - 1, helpcol - 6, eoltype, SCHEME_STBAR1, 5);
1275 mateusz.vi 227 
  }
1313 mateusz.vi 228 
 
1335 mateusz.vi 229 
  mdr_cout_str(screenh - 1, helpcol, s, SCHEME_STBAR2, 40);
1275 mateusz.vi 230 
}
231 
 
232 
 
1331 mateusz.vi 233 
static void ui_msg(const char *msg1, const char *msg2, unsigned char attr) {
1312 mateusz.vi 234 
  unsigned short x, y, msglen, i;
1331 mateusz.vi 235 
  unsigned char msg2flag = 0;
236 
 
237 
  msglen = strlen(msg1);
238 
  if (msg2) {
239 
    msg2flag = 1;
240 
    i = strlen(msg2);
241 
    if (i > msglen) msglen = i;
242 
  }
243 
 
244 
  y = (screenh - 6) >> 1;
1312 mateusz.vi 245 
  x = (screenw - msglen - 4) >> 1;
1331 mateusz.vi 246 
  for (i = y+2+msg2flag; i >= y; i--) mdr_cout_char_rep(i, x, ' ', attr, msglen + 2);
247 
  x++;
1345 mateusz.vi 248 
 
1331 mateusz.vi 249 
  mdr_cout_str(y+1, x, msg1, attr, msglen);
250 
  if (msg2) mdr_cout_str(y+2, x, msg2, attr, msglen);
1312 mateusz.vi 251 
 
1327 mateusz.vi 252 
  if (uidirty.from > y) uidirty.from = y;
1331 mateusz.vi 253 
  if (uidirty.to < y+4) uidirty.to = y+4;
1312 mateusz.vi 254 
}
255 
 
256 
 
1342 mateusz.vi 257 
static unsigned char ui_confirm_if_unsaved(struct file *db) {
258 
  if (db->modflag == 0) return(0);
259 
 
260 
  /* if file has been modified then ask for confirmation */
261 
  ui_msg(svarlang_str(0,4), svarlang_str(0,5), SCHEME_MSG);
262 
  if (keyb_getkey() == '\r') return(0);
263 
 
264 
  return(1);
265 
}
266 
 
267 
 
1348 mateusz.vi 268 
static void ui_help(void) {
1347 mateusz.vi 269 
#define MAXLINLEN 39
270 
  unsigned short i, offset;
271 
  offset = (screenw - MAXLINLEN) >> 1;
1335 mateusz.vi 272 
 
1347 mateusz.vi 273 
  for (i = 3; i < 25; i++) {
1337 mateusz.vi 274 
    const char *s = svarlang_str(8, i);
1335 mateusz.vi 275 
    if (s[0] == 0) break;
1347 mateusz.vi 276 
    mdr_cout_char_rep(i, offset, ' ', SCHEME_STBAR1, MAXLINLEN);
1335 mateusz.vi 277 
    if (s[0] == '.') continue;
1347 mateusz.vi 278 
    mdr_cout_locate(i, offset + 2 + mdr_cout_str(i, offset + 2, s, SCHEME_STBAR1, MAXLINLEN - 2));
1309 mateusz.vi 279 
  }
280 
 
281 
  keyb_getkey();
282 
#undef MAXLINLEN
283 
}
284 
 
285 
 
1327 mateusz.vi 286 
static void ui_refresh(const struct file *db) {
1318 mateusz.vi 287 
  unsigned char x;
1310 mateusz.vi 288 
  const struct line far *l;
1316 mateusz.vi 289 
  unsigned char y = db->cursorposy;
1275 mateusz.vi 290 
 
1288 mateusz.vi 291 
#ifdef DBG_REFRESH
1282 mateusz.vi 292 
  static char m = 'a';
293 
  m++;
294 
  if (m > 'z') m = 'a';
1288 mateusz.vi 295 
#endif
1282 mateusz.vi 296 
 
1310 mateusz.vi 297 
  /* rewind cursor line to first line that needs redrawing */
1327 mateusz.vi 298 
  for (l = db->cursor; y > uidirty.from; y--) l = l->prev;
1282 mateusz.vi 299 
 
1310 mateusz.vi 300 
  /* iterate over lines and redraw whatever needs to be redrawn */
301 
  for (; l != NULL; l = l->next, y++) {
302 
 
303 
    /* skip lines that do not need to be refreshed */
1327 mateusz.vi 304 
    if (y < uidirty.from) continue;
305 
    if (y > uidirty.to) break;
1282 mateusz.vi 306 
 
1318 mateusz.vi 307 
    x = 0;
1275 mateusz.vi 308 
    if (db->xoffset < l->len) {
1318 mateusz.vi 309 
      unsigned char i, limit;
310 
      if (l->len - db->xoffset < screenw) {
311 
        limit = l->len;
312 
      } else {
313 
        limit = db->xoffset + screenw - 1;
314 
      }
1333 mateusz.vi 315 
      for (i = db->xoffset; i < limit; i++) mdr_cout_char(y, x++, l->payload[i], SCHEME_TEXT);
1275 mateusz.vi 316 
    }
1282 mateusz.vi 317 
 
1318 mateusz.vi 318 
    /* write empty spaces until end of line */
1333 mateusz.vi 319 
    if (x < screenw - 1) mdr_cout_char_rep(y, x, ' ', SCHEME_TEXT, screenw - 1 - x);
1318 mateusz.vi 320 
 
1288 mateusz.vi 321 
#ifdef DBG_REFRESH
1333 mateusz.vi 322 
    mdr_cout_char(y, 0, m, SCHEME_STBAR1);
1288 mateusz.vi 323 
#endif
1282 mateusz.vi 324 
 
1275 mateusz.vi 325 
    if (y == screenh - 2) break;
326 
  }
1310 mateusz.vi 327 
 
1319 mateusz.vi 328 
  /* fill all lines below if empty (and they need to be redrawn) */
329 
  if (l == NULL) {
1327 mateusz.vi 330 
    while ((y < screenh - 1) && (y < uidirty.to)) {
1333 mateusz.vi 331 
      mdr_cout_char_rep(y++, 0, ' ', SCHEME_TEXT, screenw - 1);
1319 mateusz.vi 332 
    }
1318 mateusz.vi 333 
  }
1328 mateusz.vi 334 
 
1330 mateusz.vi 335 
  /* "file changed" flag */
336 
  {
337 
    char flg = ' ';
338 
    if (db->modflag) flg = '*';
1333 mateusz.vi 339 
    mdr_cout_char(screenh - 1, 0, flg, SCHEME_STBAR1);
1330 mateusz.vi 340 
  }
341 
 
1328 mateusz.vi 342 
  /* scroll bar */
343 
  for (y = 0; y < (screenh - 1); y++) {
1333 mateusz.vi 344 
    mdr_cout_char(y, screenw - 1, SCROLL_CURSOR, SCHEME_SCROLL);
1328 mateusz.vi 345 
  }
346 
 
347 
  /* scroll cursor */
348 
  if (db->totlines >= screenh) {
349 
    unsigned short topline = db->curline - db->cursorposy;
350 
    unsigned short col;
351 
    unsigned short totlines = db->totlines - screenh + 1;
352 
    if (db->totlines - screenh > screenh) {
353 
      col = topline / (totlines / (screenh - 1));
354 
    } else {
355 
      col = topline * (screenh - 1) / totlines;
356 
    }
357 
    if (col >= screenh - 1) col = screenh - 2;
1333 mateusz.vi 358 
    mdr_cout_char(col, screenw - 1, ' ', SCHEME_SCROLL);
1328 mateusz.vi 359 
  }
1275 mateusz.vi 360 
}
361 
 
362 
 
1327 mateusz.vi 363 
static void check_cursor_not_after_eol(struct file *db) {
1316 mateusz.vi 364 
  if (db->xoffset + db->cursorposx <= db->cursor->len) return;
1275 mateusz.vi 365 
 
366 
  if (db->cursor->len < db->xoffset) {
1316 mateusz.vi 367 
    db->cursorposx = 0;
1275 mateusz.vi 368 
    db->xoffset = db->cursor->len;
1327 mateusz.vi 369 
    uidirty.from = 0;
370 
    uidirty.to = 0xff;
1275 mateusz.vi 371 
  } else {
1316 mateusz.vi 372 
    db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 373 
  }
374 
}
375 
 
376 
 
1327 mateusz.vi 377 
static void cursor_up(struct file *db) {
1275 mateusz.vi 378 
  if (db->cursor->prev != NULL) {
1328 mateusz.vi 379 
    db->curline -= 1;
1275 mateusz.vi 380 
    db->cursor = db->cursor->prev;
1316 mateusz.vi 381 
    if (db->cursorposy == 0) {
1327 mateusz.vi 382 
      uidirty.from = 0;
383 
      uidirty.to = 0xff;
1275 mateusz.vi 384 
    } else {
1316 mateusz.vi 385 
      db->cursorposy -= 1;
1275 mateusz.vi 386 
    }
387 
  }
388 
}
389 
 
390 
 
1327 mateusz.vi 391 
static void cursor_eol(struct file *db) {
1275 mateusz.vi 392 
  /* adjust xoffset to make sure eol is visible on screen */
1282 mateusz.vi 393 
  if (db->xoffset > db->cursor->len) {
394 
    db->xoffset = db->cursor->len - 1;
1327 mateusz.vi 395 
    uidirty.from = 0;
396 
    uidirty.to = 0xff;
1282 mateusz.vi 397 
  }
398 
 
399 
  if (db->xoffset + screenw - 1 <= db->cursor->len) {
400 
    db->xoffset = db->cursor->len - screenw + 2;
1327 mateusz.vi 401 
    uidirty.from = 0;
402 
    uidirty.to = 0xff;
1282 mateusz.vi 403 
  }
1316 mateusz.vi 404 
  db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 405 
}
406 
 
407 
 
1327 mateusz.vi 408 
static void cursor_down(struct file *db) {
1276 mateusz.vi 409 
  if (db->cursor->next != NULL) {
1328 mateusz.vi 410 
    db->curline += 1;
1276 mateusz.vi 411 
    db->cursor = db->cursor->next;
1316 mateusz.vi 412 
    if (db->cursorposy < screenh - 2) {
413 
      db->cursorposy += 1;
1276 mateusz.vi 414 
    } else {
1327 mateusz.vi 415 
      uidirty.from = 0;
416 
      uidirty.to = 0xff;
1276 mateusz.vi 417 
    }
418 
  }
419 
}
420 
 
421 
 
1327 mateusz.vi 422 
static void cursor_left(struct file *db) {
1316 mateusz.vi 423 
  if (db->cursorposx > 0) {
424 
    db->cursorposx -= 1;
1302 mateusz.vi 425 
  } else if (db->xoffset > 0) {
426 
    db->xoffset -= 1;
1327 mateusz.vi 427 
    uidirty.from = 0;
428 
    uidirty.to = 0xff;
1302 mateusz.vi 429 
  } else if (db->cursor->prev != NULL) { /* jump to end of line above */
1327 mateusz.vi 430 
    cursor_up(db);
431 
    cursor_eol(db);
1302 mateusz.vi 432 
  }
433 
}
434 
 
435 
 
1327 mateusz.vi 436 
static void cursor_home(struct file *db) {
1316 mateusz.vi 437 
  db->cursorposx = 0;
1282 mateusz.vi 438 
  if (db->xoffset != 0) {
439 
    db->xoffset = 0;
1327 mateusz.vi 440 
    uidirty.from = 0;
441 
    uidirty.to = 0xff;
1282 mateusz.vi 442 
  }
1276 mateusz.vi 443 
}
444 
 
445 
 
1327 mateusz.vi 446 
static void cursor_right(struct file *db) {
1316 mateusz.vi 447 
  if (db->cursor->len > db->xoffset + db->cursorposx) {
448 
    if (db->cursorposx < screenw - 2) {
449 
      db->cursorposx += 1;
1308 mateusz.vi 450 
    } else {
451 
      db->xoffset += 1;
1327 mateusz.vi 452 
      uidirty.from = 0;
453 
      uidirty.to = 0xff;
1308 mateusz.vi 454 
    }
455 
  } else {
1327 mateusz.vi 456 
    cursor_down(db);
457 
    cursor_home(db);
1308 mateusz.vi 458 
  }
459 
}
460 
 
461 
 
1327 mateusz.vi 462 
static void del(struct file *db) {
1316 mateusz.vi 463 
  if (db->cursorposx + db->xoffset < db->cursor->len) {
464 
    _fmemmove(db->cursor->payload + db->cursorposx + db->xoffset, db->cursor->payload + db->cursorposx + db->xoffset + 1, db->cursor->len - db->cursorposx - db->xoffset);
1292 mateusz.vi 465 
    db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */
1327 mateusz.vi 466 
    uidirty.from = db->cursorposy;
467 
    uidirty.to = db->cursorposy;
1330 mateusz.vi 468 
    db->modflag = 1;
1292 mateusz.vi 469 
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
470 
    struct line far *nextline = db->cursor->next;
471 
    if (db->cursor->next->len > 0) {
1340 mateusz.vi 472 
      if (curline_resize(db, db->cursor->len + db->cursor->next->len + 1) == 0) {
1337 mateusz.vi 473 
        _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
1292 mateusz.vi 474 
        db->cursor->len += db->cursor->next->len;
475 
      }
476 
    }
1340 mateusz.vi 477 
 
1292 mateusz.vi 478 
    db->cursor->next = db->cursor->next->next;
479 
    db->cursor->next->prev = db->cursor;
1340 mateusz.vi 480 
 
1339 mateusz.vi 481 
    line_free(nextline);
1327 mateusz.vi 482 
    uidirty.from = db->cursorposy;
483 
    uidirty.to = 0xff;
1328 mateusz.vi 484 
    db->totlines -= 1;
1330 mateusz.vi 485 
    db->modflag = 1;
1292 mateusz.vi 486 
  }
487 
}
488 
 
489 
 
1327 mateusz.vi 490 
static void bkspc(struct file *db) {
1302 mateusz.vi 491 
 
492 
  /* backspace is basically "left + del", not applicable only if cursor is on 1st byte of the file */
1316 mateusz.vi 493 
  if ((db->cursorposx == 0) && (db->xoffset == 0) && (db->cursor->prev == NULL)) return;
1302 mateusz.vi 494 
 
1327 mateusz.vi 495 
  cursor_left(db);
496 
  del(db);
1302 mateusz.vi 497 
}
498 
 
499 
 
1286 mateusz.vi 500 
/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need
501 
 * of argc and argv, saves some 330 bytes of binary size */
502 
static char *parseargv(void) {
503 
  char *tail = (void *)0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */
1348 mateusz.vi 504 
  unsigned short count = 0;
1286 mateusz.vi 505 
  char *argv[4];
506 
 
507 
  while (count < 4) {
508 
    /* jump to nearest arg */
509 
    while (*tail == ' ') {
510 
      *tail = 0;
511 
      tail++;
512 
    }
513 
 
514 
    if (*tail == '\r') {
515 
      *tail = 0;
516 
      break;
517 
    }
518 
 
519 
    argv[count++] = tail;
520 
 
521 
    /* jump to next delimiter */
522 
    while ((*tail != ' ') && (*tail != '\r')) tail++;
523 
  }
524 
 
525 
  /* check args now */
1321 mateusz.vi 526 
  if (count == 0) return("");
1286 mateusz.vi 527 
 
528 
  return(argv[0]);
529 
}
530 
 
531 
 
1346 mateusz.vi 532 
/* returns 0 on success, 1 on file not found, 2 on other error */
533 
static unsigned char loadfile(struct file *db, const char *fname) {
1324 mateusz.vi 534 
  char buff[512]; /* read one entire sector at a time (faster) */
535 
  char *buffptr;
536 
  unsigned int len, llen;
1287 mateusz.vi 537 
  int fd;
1324 mateusz.vi 538 
  unsigned char eolfound;
1287 mateusz.vi 539 
 
1339 mateusz.vi 540 
  bzero(db, sizeof(db));
541 
  memcpy(db->fname, fname, strlen(fname));
1321 mateusz.vi 542 
 
543 
  if (*fname == 0) goto SKIPLOADING;
544 
 
1287 mateusz.vi 545 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
1346 mateusz.vi 546 
    return(1);
1287 mateusz.vi 547 
  }
548 
 
1313 mateusz.vi 549 
  db->lfonly = 1;
550 
 
1324 mateusz.vi 551 
  /* start by adding an empty line */
1328 mateusz.vi 552 
  if (line_add(db, NULL, 0) != 0) {
1324 mateusz.vi 553 
    /* TODO ERROR HANDLING */
554 
  }
1287 mateusz.vi 555 
 
1324 mateusz.vi 556 
  for (eolfound = 0;;) {
557 
    unsigned short consumedbytes;
558 
 
559 
    if ((_dos_read(fd, buff, sizeof(buff), &len) != 0) || (len == 0)) break;
560 
    buffptr = buff;
561 
 
562 
    FINDLINE:
563 
 
564 
    /* look for nearest \n */
565 
    for (consumedbytes = 0;; consumedbytes++) {
566 
      if (consumedbytes == len) {
567 
        llen = consumedbytes;
568 
        break;
1323 mateusz.vi 569 
      }
1324 mateusz.vi 570 
      if (buffptr[consumedbytes] == '\r') {
571 
        llen = consumedbytes;
572 
        consumedbytes++;
573 
        db->lfonly = 0;
1320 mateusz.vi 574 
        break;
575 
      }
1324 mateusz.vi 576 
      if (buffptr[consumedbytes] == '\n') {
577 
        eolfound = 1;
578 
        llen = consumedbytes;
579 
        consumedbytes++;
580 
        break;
581 
      }
1287 mateusz.vi 582 
    }
1324 mateusz.vi 583 
 
584 
    /* consumedbytes is the amount of bytes processed from buffptr,
585 
     * llen is the length of line's payload (without its line terminator) */
586 
 
587 
    /* append content, if line is non-empty */
588 
    if ((llen > 0) && (line_append(db, buffptr, llen) != 0)) {
1339 mateusz.vi 589 
      goto IOERR;
1287 mateusz.vi 590 
    }
591 
 
1324 mateusz.vi 592 
    /* add a new line if necessary */
593 
    if (eolfound) {
1328 mateusz.vi 594 
      if (line_add(db, NULL, 0) != 0) {
1339 mateusz.vi 595 
        goto IOERR;
1324 mateusz.vi 596 
      }
597 
      eolfound = 0;
598 
    }
1287 mateusz.vi 599 
 
1324 mateusz.vi 600 
    /* anything left? process the buffer leftover again */
601 
    if (consumedbytes < len) {
602 
      len -= consumedbytes;
603 
      buffptr += consumedbytes;
604 
      goto FINDLINE;
605 
    }
606 
 
607 
  }
608 
 
1287 mateusz.vi 609 
  _dos_close(fd);
610 
 
1321 mateusz.vi 611 
  SKIPLOADING:
612 
 
1320 mateusz.vi 613 
  /* add an empty line at end if not present already, also rewind cursor to top of file */
1339 mateusz.vi 614 
  if ((db->cursor == NULL) || (db->cursor->len != 0)) line_add(db, NULL, 0);
615 
  db_rewind(db);
1320 mateusz.vi 616 
 
1346 mateusz.vi 617 
  return(0);
1339 mateusz.vi 618 
 
619 
  IOERR:
620 
  _dos_close(fd);
1346 mateusz.vi 621 
  return(2);
1287 mateusz.vi 622 
}
623 
 
624 
 
1332 mateusz.vi 625 
static int savefile(const struct file *db, const char *newfname) {
1311 mateusz.vi 626 
  int fd;
627 
  const struct line far *l;
628 
  unsigned bytes;
1313 mateusz.vi 629 
  unsigned char eollen;
630 
  unsigned char eolbuf[2];
1332 mateusz.vi 631 
  int errflag = 0;
1313 mateusz.vi 632 
 
1332 mateusz.vi 633 
  /* either create a new file if newfname provided, or... */
634 
  if (newfname) {
635 
    if (_dos_creatnew(newfname, _A_NORMAL, &fd) != 0) return(-1);
636 
  } else { /* ...open db->fname */
637 
    if (_dos_open(db->fname, O_WRONLY, &fd) != 0) return(-1);
1311 mateusz.vi 638 
  }
639 
 
640 
  l = db->cursor;
641 
  while (l->prev) l = l->prev;
642 
 
1313 mateusz.vi 643 
  /* preset line terminators */
644 
  if (db->lfonly) {
645 
    eolbuf[0] = '\n';
646 
    eollen = 1;
647 
  } else {
648 
    eolbuf[0] = '\r';
649 
    eolbuf[1] = '\n';
650 
    eollen = 2;
651 
  }
652 
 
1311 mateusz.vi 653 
  while (l) {
1324 mateusz.vi 654 
    /* do not write the last empty line, it is only useful for edition */
655 
    if (l->len != 0) {
1332 mateusz.vi 656 
      errflag |= _dos_write(fd, l->payload, l->len, &bytes);
1324 mateusz.vi 657 
    } else if (l->next == NULL) {
658 
      break;
659 
    }
1332 mateusz.vi 660 
    errflag |= _dos_write(fd, eolbuf, eollen, &bytes);
1311 mateusz.vi 661 
    l = l->next;
662 
  }
663 
 
1332 mateusz.vi 664 
  errflag |= _dos_close(fd);
1330 mateusz.vi 665 
 
1332 mateusz.vi 666 
  return(errflag);
1311 mateusz.vi 667 
}
668 
 
669 
 
1327 mateusz.vi 670 
static void insert_in_line(struct file *db, const char *databuf, unsigned short len) {
1340 mateusz.vi 671 
  if (curline_resize(db, db->cursor->len + len) == 0) {
1317 mateusz.vi 672 
    unsigned short off = db->xoffset + db->cursorposx;
1330 mateusz.vi 673 
    db->modflag = 1;
1317 mateusz.vi 674 
    _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1);
675 
    db->cursor->len += len;
1327 mateusz.vi 676 
    uidirty.from = db->cursorposy;
677 
    uidirty.to = db->cursorposy;
1317 mateusz.vi 678 
    while (len--) {
679 
      db->cursor->payload[off++] = *databuf;
680 
      databuf++;
1327 mateusz.vi 681 
      cursor_right(db);
1317 mateusz.vi 682 
    }
683 
  }
684 
}
685 
 
686 
 
1342 mateusz.vi 687 
static void clear_file(struct file *db) {
688 
 
689 
  /* free the entire linked list of lines */
690 
  db_rewind(db);
691 
  while (db->cursor) {
692 
    struct line far *victim;
693 
    victim = db->cursor;
694 
    db->cursor = db->cursor->next;
695 
    line_free(victim);
696 
  }
697 
 
698 
  /* zero out the struct */
699 
  bzero(db, sizeof(struct file));
700 
}
701 
 
702 
 
1343 mateusz.vi 703 
/* recompute db->curline by counting nodes in linked list */
704 
static void recompute_curline(struct file *db) {
705 
  const struct line far *l = db->cursor;
706 
 
707 
  db->curline = 0;
708 
  while (l->prev != NULL) {
709 
    db->curline += 1;
710 
    l = l->prev;
711 
  }
712 
}
713 
 
714 
 
1347 mateusz.vi 715 
/* main returns nothing, ie. sved always exits with a zero exit code
716 
 * (this saves 20 bytes of executable footprint) */
717 
void main(void) {
1346 mateusz.vi 718 
  static struct file dbarr[1];
1286 mateusz.vi 719 
  const char *fname;
1346 mateusz.vi 720 
  struct file *db = dbarr;
1275 mateusz.vi 721 
 
1307 mateusz.vi 722 
  {
723 
    char nlspath[128], lang[8];
724 
    svarlang_autoload_pathlist("sved", mdr_dos_getenv(nlspath, "NLSPATH", sizeof(nlspath)), mdr_dos_getenv(lang, "LANG", sizeof(lang)));
725 
  }
1282 mateusz.vi 726 
 
1286 mateusz.vi 727 
  fname = parseargv();
728 
 
729 
  if (fname == NULL) {
1302 mateusz.vi 730 
    mdr_coutraw_puts(svarlang_str(1,0)); /* usage: sved file.txt */
1347 mateusz.vi 731 
    return;
1275 mateusz.vi 732 
  }
733 
 
1282 mateusz.vi 734 
  /* load file */
1346 mateusz.vi 735 
  {
736 
    unsigned char err = loadfile(db, fname);
737 
    if (err == 1) {
738 
      mdr_coutraw_puts(svarlang_str(0,11)); /* file not found */
1347 mateusz.vi 739 
      return;
1346 mateusz.vi 740 
    } else if (err != 0) {
741 
      mdr_coutraw_puts(svarlang_str(0,10)); /* ERROR */
1347 mateusz.vi 742 
      return;
1346 mateusz.vi 743 
    }
744 
  }
1282 mateusz.vi 745 
 
1333 mateusz.vi 746 
  if (mdr_cout_init(&screenw, &screenh)) {
747 
    /* load color scheme if mdr_cout_init returns a color flag */
748 
    SCHEME_TEXT = 0x17;
749 
    SCHEME_STBAR1 = 0x70;
750 
    SCHEME_STBAR2 = 0x78;
751 
    SCHEME_STBAR3 = 0xf0;
752 
    SCHEME_SCROLL = 0x70;
753 
    SCHEME_MSG = 0xf0;
754 
    SCHEME_ERR = 0x4f;
755 
  }
1275 mateusz.vi 756 
 
757 
  for (;;) {
758 
    int k;
759 
 
1327 mateusz.vi 760 
    check_cursor_not_after_eol(db);
1320 mateusz.vi 761 
    mdr_cout_locate(db->cursorposy, db->cursorposx);
1275 mateusz.vi 762 
 
1327 mateusz.vi 763 
    if (uidirty.from != 0xff) {
764 
      ui_refresh(db);
765 
      uidirty.from = 0xff;
1282 mateusz.vi 766 
    }
1342 mateusz.vi 767 
    if (uidirty.statusbar) {
768 
      ui_basic(db);
769 
      uidirty.statusbar = 0;
770 
    }
1328 mateusz.vi 771 
#ifdef DBG_LINENUM
772 
      {
773 
        char ddd[10];
774 
        db->curline += 1;
775 
        ddd[0] = '0' + db->curline / 100;
776 
        ddd[1] = '0' + (db->curline % 100) / 10;
777 
        ddd[2] = '0' + (db->curline % 10);
778 
        db->curline -= 1;
779 
        ddd[3] = '/';
780 
        ddd[4] = '0' + db->totlines / 100;
781 
        ddd[5] = '0' + (db->totlines % 100) / 10;
782 
        ddd[6] = '0' + (db->totlines % 10);
783 
        ddd[7] = 0;
1333 mateusz.vi 784 
        mdr_cout_str(screenh - 1, 40, ddd, SCHEME_STBAR1, sizeof(ddd));
1328 mateusz.vi 785 
      }
786 
#endif
1275 mateusz.vi 787 
 
788 
    k = keyb_getkey();
1282 mateusz.vi 789 
 
1275 mateusz.vi 790 
    if (k == 0x150) { /* down */
1327 mateusz.vi 791 
      cursor_down(db);
1275 mateusz.vi 792 
 
793 
    } else if (k == 0x148) { /* up */
1327 mateusz.vi 794 
      cursor_up(db);
1275 mateusz.vi 795 
 
796 
    } else if (k == 0x14D) { /* right */
1327 mateusz.vi 797 
      cursor_right(db);
1275 mateusz.vi 798 
 
799 
    } else if (k == 0x14B) { /* left */
1327 mateusz.vi 800 
      cursor_left(db);
1275 mateusz.vi 801 
 
1282 mateusz.vi 802 
    } else if (k == 0x149) { /* pgup */
1334 mateusz.vi 803 
      unsigned char dist = db->cursorposy + screenh - 1;
804 
      while ((dist != 0) && (db->cursor->prev != NULL)) {
805 
        db->cursor = db->cursor->prev;
806 
        dist--;
807 
      }
808 
      if (dist != 0) {
809 
        db->cursorposy = 0;
810 
        db->cursorposx = 0;
811 
      } else {
812 
        dist = db->cursorposy;
813 
        while ((dist--) && (db->cursor->next)) db->cursor = db->cursor->next;
814 
      }
815 
      uidirty.from = 0;
816 
      uidirty.to = 0xff;
1343 mateusz.vi 817 
      recompute_curline(db);
1282 mateusz.vi 818 
 
819 
    } else if (k == 0x151) { /* pgdown */
1334 mateusz.vi 820 
      unsigned char dist = screenh + screenh - db->cursorposy - 3;
821 
      while ((dist != 0) && (db->cursor->next != NULL)) {
822 
        db->cursor = db->cursor->next;
823 
        dist--;
824 
      }
825 
      if (dist != 0) {
826 
        db->cursorposy = screenh - 2;
827 
        if (db->totlines <= db->cursorposy) db->cursorposy = db->totlines - 1;
828 
        db->cursorposx = 0;
829 
      } else {
830 
        dist = screenh - 2 - db->cursorposy;
831 
        while ((dist--) && (db->cursor->prev)) db->cursor = db->cursor->prev;
832 
      }
833 
      uidirty.from = 0;
834 
      uidirty.to = 0xff;
1343 mateusz.vi 835 
      recompute_curline(db);
1282 mateusz.vi 836 
 
837 
    } else if (k == 0x147) { /* home */
1327 mateusz.vi 838 
       cursor_home(db);
1282 mateusz.vi 839 
 
840 
    } else if (k == 0x14F) { /* end */
1327 mateusz.vi 841 
       cursor_eol(db);
1282 mateusz.vi 842 
 
1275 mateusz.vi 843 
    } else if (k == 0x1B) { /* ESC */
1342 mateusz.vi 844 
      if (ui_confirm_if_unsaved(db) == 0) break;
1275 mateusz.vi 845 
 
1289 mateusz.vi 846 
    } else if (k == 0x0D) { /* ENTER */
1328 mateusz.vi 847 
      unsigned short off = db->xoffset + db->cursorposx;
1289 mateusz.vi 848 
      /* add a new line */
1328 mateusz.vi 849 
      if (line_add(db, db->cursor->payload + off, db->cursor->len - off) == 0) {
1330 mateusz.vi 850 
        db->modflag = 1;
1328 mateusz.vi 851 
        db->cursor = db->cursor->prev; /* back to original line */
1289 mateusz.vi 852 
        /* trim the line above */
1328 mateusz.vi 853 
        db->cursor->len = off;
1289 mateusz.vi 854 
        /* move cursor to the (new) line below */
1343 mateusz.vi 855 
        db->curline -= 1;
1328 mateusz.vi 856 
        uidirty.from = db->cursorposy;
1327 mateusz.vi 857 
        uidirty.to = 0xff;
1328 mateusz.vi 858 
        cursor_down(db);
859 
        cursor_home(db);
1289 mateusz.vi 860 
      } else {
861 
        /* ERROR: OUT OF MEMORY */
862 
      }
863 
 
1292 mateusz.vi 864 
    } else if (k == 0x153) {  /* DEL */
1327 mateusz.vi 865 
      del(db);
1292 mateusz.vi 866 
 
1302 mateusz.vi 867 
    } else if (k == 0x008) { /* BKSPC */
1327 mateusz.vi 868 
      bkspc(db);
1302 mateusz.vi 869 
 
1308 mateusz.vi 870 
    } else if ((k >= 0x20) && (k <= 0xff)) { /* "normal" character */
1317 mateusz.vi 871 
      char c = k;
1327 mateusz.vi 872 
      insert_in_line(db, &c, 1);
1308 mateusz.vi 873 
 
1317 mateusz.vi 874 
    } else if (k == 0x009) { /* TAB */
1348 mateusz.vi 875 
      insert_in_line(db, "        ", 8);
1317 mateusz.vi 876 
 
1309 mateusz.vi 877 
    } else if (k == 0x13b) { /* F1 */
1326 mateusz.vi 878 
      ui_help();
1327 mateusz.vi 879 
      uidirty.from = 0;
880 
      uidirty.to = 0xff;
1309 mateusz.vi 881 
 
1342 mateusz.vi 882 
    } else if (k == 0x13c) { /* F2 (new file) */
1348 mateusz.vi 883 
      if (ui_confirm_if_unsaved(db) == 0) {
884 
        clear_file(db);
885 
        /* add a single empty line */
886 
        line_add(db, NULL, 0);
887 
      }
1342 mateusz.vi 888 
      uidirty.from = 0;
889 
      uidirty.to = 0xff;
890 
      uidirty.statusbar = 1;
891 
 
1345 mateusz.vi 892 
    } else if (k == 0x13d) { /* F3 (load file) */
893 
      char fname[25];
894 
 
895 
      /* display a warning if unsaved changes are pending */
896 
      if (db->modflag != 0) ui_msg(svarlang_str(0,4), svarlang_str(0,8), SCHEME_MSG);
897 
 
898 
      /* ask for filename */
899 
      ui_getstring(svarlang_str(0,7), fname, sizeof(fname));
900 
      if (fname[0] != 0) {
1346 mateusz.vi 901 
        unsigned char err;
1345 mateusz.vi 902 
        clear_file(db);
1346 mateusz.vi 903 
        err = loadfile(db, fname);
904 
        if (err != 0) {
905 
          if (err == 1) {
906 
            ui_msg(svarlang_str(0,11), NULL, SCHEME_ERR); /* file not found */
907 
          } else {
908 
            ui_msg(svarlang_str(0,10), NULL, SCHEME_ERR);  /* ERROR */
909 
          }
910 
          mdr_bios_tickswait(44); /* 3s */
911 
          clear_file(db);
912 
        }
1345 mateusz.vi 913 
      }
914 
      uidirty.from = 0;
915 
      uidirty.to = 0xff;
916 
      uidirty.statusbar = 1;
917 
 
1332 mateusz.vi 918 
    } else if ((k == 0x13f) || (k == 0x140)) { /* F5 or F6 */
919 
      int saveres;
920 
 
921 
      if ((k == 0x140) || (db->fname[0] == 0)) { /* save as... */
922 
        char fname[25];
923 
        ui_getstring(svarlang_str(0,6), fname, sizeof(fname));
924 
        if (*fname == 0) continue;
925 
        saveres = savefile(db, fname);
926 
        if (saveres == 0) memcpy(db->fname, fname, sizeof(fname));
927 
      } else {
928 
        saveres = savefile(db, NULL);
929 
      }
930 
 
931 
      if (saveres == 0) {
1330 mateusz.vi 932 
        db->modflag = 0;
1333 mateusz.vi 933 
        ui_msg(svarlang_str(0, 2), NULL, SCHEME_MSG);
1322 mateusz.vi 934 
        mdr_bios_tickswait(11); /* 11 ticks is about 600 ms */
935 
      } else {
1333 mateusz.vi 936 
        ui_msg(svarlang_str(0, 3), NULL, SCHEME_ERR);
1322 mateusz.vi 937 
        mdr_bios_tickswait(36); /* 2s */
938 
      }
1311 mateusz.vi 939 
 
1332 mateusz.vi 940 
      ui_refresh(db);
1342 mateusz.vi 941 
      uidirty.statusbar = 1;
1332 mateusz.vi 942 
 
1314 mateusz.vi 943 
    } else if (k == 0x144) { /* F10 */
1330 mateusz.vi 944 
      db->modflag = 1;
1320 mateusz.vi 945 
      db->lfonly ^= 1;
1342 mateusz.vi 946 
      uidirty.statusbar = 1;
1314 mateusz.vi 947 
 
1325 mateusz.vi 948 
    } else if (k == 0x174) { /* CTRL+ArrRight - jump to next word */
949 
      /* if currently cursor is on a non-space, then fast-forward to nearest space or EOL */
950 
      for (;;) {
951 
        if (db->xoffset + db->cursorposx == db->cursor->len) break;
952 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') break;
1327 mateusz.vi 953 
        cursor_right(db);
1325 mateusz.vi 954 
      }
955 
      /* now skip to next non-space or end of file */
956 
      for (;;) {
1327 mateusz.vi 957 
        cursor_right(db);
1325 mateusz.vi 958 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
959 
        if ((db->cursor->next == NULL) && (db->cursorposx + db->xoffset == db->cursor->len)) break;
960 
      }
961 
 
962 
    } else if (k == 0x173) { /* CTRL+ArrLeft - jump to prev word */
1327 mateusz.vi 963 
      cursor_left(db);
1325 mateusz.vi 964 
      /* if currently cursor is on a space, then fast-forward to nearest non-space or start of line */
965 
      for (;;) {
966 
        if ((db->xoffset == 0) && (db->cursorposx == 0)) break;
967 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1327 mateusz.vi 968 
        cursor_left(db);
1325 mateusz.vi 969 
      }
970 
      /* now skip to next space or start of file */
971 
      for (;;) {
1327 mateusz.vi 972 
        cursor_left(db);
1325 mateusz.vi 973 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') {
1327 mateusz.vi 974 
          cursor_right(db);
1325 mateusz.vi 975 
          break;
976 
        }
977 
        if ((db->cursorposx == 0) && (db->xoffset == 0)) break;
978 
      }
979 
 
1333 mateusz.vi 980 
#ifdef DBG_UNHKEYS
1282 mateusz.vi 981 
    } else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */
982 
      char buff[4];
983 
      const char *HEX = "0123456789ABCDEF";
984 
      buff[0] = HEX[(k >> 8) & 15];
985 
      buff[1] = HEX[(k >> 4) & 15];
986 
      buff[2] = HEX[k & 15];
1333 mateusz.vi 987 
      mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", SCHEME_STBAR1, 17);
988 
      mdr_cout_str(screenh - 1, 17, buff, SCHEME_STBAR1, 3);
1275 mateusz.vi 989 
      keyb_getkey();
990 
      break;
1333 mateusz.vi 991 
#endif
1275 mateusz.vi 992 
    }
993 
  }
994 
 
995 
  mdr_cout_close();
996 
 
1320 mateusz.vi 997 
  /* no need to free memory, DOS will do it for me */
1275 mateusz.vi 998 
 
1347 mateusz.vi 999 
  return;
1275 mateusz.vi 1000 
}